CN1136910A - Collapsible seating apparatus - Google Patents

Abstract

The present invention provides a collapsible baby buggy including, as principal elements, front legs rear legs arm rest members, push bars and side bars which are symmetrical in relation to the longitudinal direction of the baby buggy. These side members are folded up longitudinally without a change in their width. A tension spring and a compression spring are arranged in series in the longitudinal direction of a rear leg. A slider is hinged to the side bars and is movable up and down in the longitudinal direction of the rear leg. A pedal frame is movable up and down in the longitudinal direction of the rear leg. The tension spring is fixed between the slider and the pedal frame, whereas the compression spring is sandwiched between the pedal frame and a bottom member of the rear leg.

Description

Collapsible seating apparatus

The present invention relates to resemble baby stroller, wheelchair, baby' chair, or the such Collapsible seating apparatus of pushchair used of the elderly, its framework can be longitudinally folding easily or be launched.

Some Foldable baby strollers commonly used are designed to only fold its (this baby stroller is commonly called two fold-types) by the mode at longitudinal folding its foreleg and back leg.

With reference to Figure 108 and 109, a kind of habitual fold mechanism that is usually used in this baby stroller will be described here.Figure 108 is the side view when fold mechanism launches fully, and Figure 109 is the side view when fold mechanism is in folded state.In these figure, each element of mechanism all is symmetrically distributed, thereby, only the element that shows one side among the figure is explained.

In Figure 108, the upper end of foreleg 81 and back leg 82 is hinged by the pivot pin 84 that is fixed on the handrail element 83.Front-wheel 85 is installed to the lower end of foreleg 81, and trailing wheel 86 is installed to the lower end of back leg 82.

Carriage 87 is hinged on the axial center of back leg 82 by pin 88.In obtuse angle L shaped of carriage 87, that is, its shape is as the mark that flys in circles.One side of carriage 87 (in this case, refer to long limit) 82 extends upward from pin 88 along back leg, and its another side (in this case, referring to minor face) is from oblique the stretching out in upper end edge back upper place on long limit.The minor face that is designed to the carriage 87 of extension 87b is hinged on the bar 89 with pin 90.Depression bar 89 usefulness pins 91 are hinged to the rear end of handrail element 83 because this structure arranged, and when foreleg 81 and back leg 82 opened, depression bar 89 pivoted motion backward was limited.

The front end of side lever 92 is hinged on certain point on the foreleg 81 with pin 93.The rear end of side lever 92 is hinged on the carriage 87 with pin 90.Because this structure is in the width that the expansion action of foreleg 81 and back leg 82 is limited in being scheduled to.

Open-close lock 94 can vertically slide along depression bar 89, and it is assemblied in the upper end of carriage 87 extension 87b.One is positioned at open-close locks the stepped portion 94a of 94 lower ends and combines with the stepped portion 87a that is positioned at carriage 87 tops, thereby pins carriage 87.

The one flexible member (not shown) of opening a locking 94 downward pulling force is positioned at depression bar 89.One cannelure 95 (seeing Figure 109) is arranged on the depression bar 89.One vertically is fixed on the inboard subordinate lock of open-close lock 96 cooperates with cannelure 95.Because this structure, the open-close lock is flexiblely pushed to carriage 87, and carriage keeps stepped portion 94a and 87a to combine successively.Upwards draw back-locking 94 if overcome the elastic force of flexible member, carriage 87 can unclamp.

Open-close lock 94 links to each other with the operating knob (not shown) that is configured in depression bar 89 tops with the metallic cable (not shown) usually, and by the mode manipulation operations button of pushing, open-close lock 94 is pulled up.

The Foldable baby stroller of GENERAL TYPE can longitudinally be folded up in the mode shown in Figure 109.The steps include: to be pulled upwardly open-close lock 94 to unclamp carriage 87; Upwards lift depression bar 89 with around lower pin 88 by the direction of arrow A indication rotating bracket 87 a little; Depress depression bar 89 then so that carriage 87 begins rotation by the direction of arrow A indication, follow the rotation of carriage 87, foreleg 81 pivots by means of the direction of side lever 92 by the arrow B indication simultaneously, depression bar 89 is brought to stand up position, finally is folded shown in Figure 109 thereby handrail element 83 is folded whole framework.

According to foregoing description, carriage 87 pivoted motions and related elements pivoted motion subsequently cause baby stroller by longitudinal folding.Yet the pivoted motion subsequently of pivoted motion and related elements is motion activated by carriage, and the motion of carriage produces this whole operation that will depend on the user by the depressing action of depression bar 89.

In addition, the pivot point of depression bar 89 (pivot pin 90) is positioned on the circumference of carriage 87 pivot point (pivot pin 88), thereby the pivoted motion of carriage 87 has a dead point.When the pivot pin 90 of depression bar 89 was positioned at the dead point, carriage 87 will oppositely not pivot, even depression bar 89 is depressed.If depression bar 89 was depressed before its frame pivot pin nail 90 arrives the dead point, carriage 87 can return the position before it, and this can stop baby stroller folding.

Owing to these reasons, when the operation baby stroller, need the user that certain skill is arranged.When retracting depression bar 89 with trailing wheel 86 as fulcrum, depression bar 89 must fold, and then, depresses depression bar 89, turning support 87.Thereby, the operation that folding baby stroller need bother.

These problems are not limited to aforesaid baby stroller, at a lot of other tools such as wheelchair with have in the pushchair for the elderly's use of similar framework and also can run into.

In view of these shortcomings of the prior art, special the present invention proposed, the objective of the invention is for a Collapsible seating apparatus is provided, it can longitudinal folding easily framework, has wherein discarded the general fold mechanism that produces pivoted motion and rotation with carriage fully.

According to the present invention, the framework of collapsible seat tool comprises: foreleg and be hinged to the back leg of handrail element rear end respectively; Be hinged to the depression bar of handrail element rear end respectively; Along back leg length direction slider slidably, and slider is hinged to the lower end of depression bar; One end is hinged to slider, and the other end is hinged to the side lever on the foreleg;

Collapsible seat tool of the present invention also comprises: keep slider to be positioned at top dead centre so that keep the seat tool to be in first holding device of extended configuration; Keep slider to be positioned at lower dead center so that keep the seat tool to be in second holding device of folded state.

Second holding device of collapsible seat tool of the present invention includes and flexibly promotes the folded spring that slider makes progress.

First holding device of collapsible seat tool of the present invention includes and flexibly promotes the downward stretching, extension spring of slider.

Collapsible seat tool of the present invention also comprises: a folded spring that flexiblely upwards promotes slider; Flexiblely promote one of slider downwards and stretch spring; Be exclusively used in and store motive force to folding and stretch storage facility in the spring; Be exclusively used in and discharge storage facility and be stored to folding and stretch motive force in the spring and transmission and be released the releasing device of power to the slider.

According to this Collapsible seating apparatus, wherein storage facility has the mechanism of a storage motive force, and motive force makes folding by artificial pressure or stretches the spring deflection and produces.

According to this Collapsible seating apparatus, wherein first device and second device comprise the motor that moves up or down slider respectively.

One of according to this Collapsible seating apparatus, seat tool wherein is baby stroller at least, in the pushchair that wheelchair, perambulator and the elderly use.

The collapsible seat of the present invention tool also comprises: there is predetermined length to be connected in left and right slider, left and right foreleg respectively, and the side lever between the left and right back leg; One pedal frame, it is assemblied in left and right back leg on one of them, and the longitudinal direction along back leg slides below slider; One extension spring and a compression spring; They are vertically arranged along the back leg of band pedal frame; The upper end of extension spring is fixed on the slider clamping block; The lower end of extension spring is fixed on the pedal frame clamping block, and the compression spring is clamped between the clamping block of pedal frame and back leg bottom; Block on one, it is contained in back leg top so that stop moving upward of slider; Lock pin on one, it releasably is configured in the top of back leg, so that stop slider to be moved down by the place that last block blocks from it; Block once, it is contained in bottom of back leg so that stop pedal frame to move down; Lock pin once, it releasably is configured in the bottom of back leg, so that stop pedal frame to be moved up by the place that block down blocks from its.

The collapsible seat of the present invention tool also comprises: a foreleg sleeve, and it rotatably is contained in a certain precalculated position of foreleg bottom; One first bevel gear, it is attached on the excircle of foreleg sleeve; One second bevel gear, it rotatably is contained in the outside of foreleg and meshes with first bevel gear; The connecting rod that one swinging block that links to each other with second bevel gear and is hinged together swinging block and side lever; One foreleg side lever, it a bit is hinged and its two ends all are connected on the left and right foreleg sleeve at certain; One slider connecting rod, it is hinged and two-end-point is hinged on the left and right slider at central point; One rear leg link, it is hinged and two-end-point is hinged to a left side, the top of right rear leg at central point; Slider connecting rod and rear leg link are hinged on the both sides of their intermediate connection points; One pedal frame, it is assemblied in left and right back leg on one of them, and below slider along the longitudinal sliding motion of back leg; One slider clamping block, the upper end of extension spring is fixed thereon; One pedal frame clamping block, the lower end of extension spring is fixed thereon, and the compression spring is clamped between the clamping block of pedal frame and back leg bottom; Block on one, its top that is assemblied in back leg moves upward to stop slider; Lock pin on one, it releasably is configured in the top of back leg, so that stop slider to be moved down by the place that last block blocks from it; Block once, it is contained in bottom of back leg so that stop pedal frame to move downward; Lock pin once, it releasably is configured in the bottom of back leg, so that stop pedal frame to be moved up by the place that block down blocks from its.

According to this collapsible seat tool, left and right depression bar is connected in together on top, and the upper end of left and right depression bar is foldably connected to the housing two ends of operating knob respectively.

According to this collapsible seat tool, it also comprises: have predetermined length to be connected to the side lever of left and right slider, left and right foreleg and left and right back leg; One pedal, it is protruding from slider, and is configured in left and right back leg on one of them; One compression spring, it vertically disposes along back leg, and is clamped between the clamping block of the clamping block of slider and back leg bottom; Block on one, its top that is contained in back leg moves up to stop slider; Block once, its bottom that is contained in back leg moves down to stop slider; With a lock pin, it releasably disposes, so that stop slider to be moved up by the place that following block blocks from it.

Collapsible seating apparatus also comprises a foreleg sleeve, and it is rotatably installed in a precalculated position of foreleg bottom; One first bevel gear, it is connected on the excircle of foreleg sleeve; One second bevel gear, it rotatably is configured in the foreleg outside, and meshes with first bevel gear; Be connected in the swinging block on second bevel gear; With with swinging block and the hinged connecting rod of side lever; One slider connecting rod, it is hinged in the center, and two ends are hinged on the left and right slider; One rear leg link, it is hinged in the center, and two ends are hinged to the top of left and right sides back leg, slider connecting rod and rear leg link are hinged on the both sides of their intermediate connection points; One pedal, it is protruding from the slider that is configured in one of left and right back leg; One compression spring, it vertically disposes along back leg, and is sandwiched between the clamping block of the clamping block of slider and back leg bottom; One is contained in the last block that back leg top stops slider to move up; One is contained in the following block that the back leg bottom stops slider to move down; With a lock pin, it releasably is configured in the lower end of back leg, so that stop slider to be moved up by the place that following block blocks from it.

This Collapsible seating apparatus also comprises: the side lever that has predetermined length respectively left and right foreleg, left and right back leg and left and right slider to be connected together; At least one energy is at the motor of forward and reverse rotation, and it is placed on the top of one of left and right back leg; One vertically is connected to screw rod on the electric machine rotational axis at back leg; One sliding members, it is being contained in the mode that back leg vertically moves on the slider; With the internal thread of sliding members, the external screw thread of itself and screw rod is combined together.

Collapsible seating apparatus also comprises: a foreleg sleeve, and it rotatably is assemblied in a precalculated position of foreleg bottom; One first bevel gear, it is connected on the excircle of foreleg sleeve; One second bevel gear, it rotatably is configured in the foreleg outside, and meshes with first bevel gear, is connected in the swinging block on second bevel gear; The connecting rod that swinging block and side lever are hinged together; One slider connecting rod, it is hinged in the center, and two ends are hinged on the left and right slider; One rear leg link, it is hinged in the center, and two ends are hinged to the top of left and right back leg, slider connecting rod and rear leg link are hinged on the both sides of their intermediate connection points; The motor of at least one energy forward and reverse rotation, it is placed on one of them top of left and right at least back leg; One vertically is connected to screw rod on the electric machine rotational axis at back leg; One sliding members, it is being contained in the mode that back leg vertically moves on the slider; Internal thread with sliding members: the external screw thread of itself and screw rod is combined together.

This Collapsible seating apparatus also comprises; One pedal frame, it is assemblied in left and right back leg on one of them, and below slider along the back leg longitudinal sliding motion; First and second extension springs; They be configured in abreast the band pedal frame back leg vertically, wherein the upper end of first extension spring is contained on the clamping block of back leg upper end, and the other end is contained on the clamping block of pedal frame, and second upper end of stretching spring is contained on the slider clamping block, and the lower end is contained on the clamping block of pedal frame.

Collapsible seating apparatus also comprises: one first bevel gear, and it is connected on the excircle of foreleg sleeve; One second bevel gear: it rotatably is configured in the foreleg outside, and meshes with first bevel gear; Be connected in the swinging block on second bevel gear; With swinging block and the side lever connecting rod that is hinged together; One a certain point articulated and two ends are contained in the side lever on the left and right foreleg sleeve; One slider connecting rod, it is hinged in the center, and two ends are hinged on the left and right slider; One rear leg link: it is hinged in the center, and two ends are hinged to the top of left and right back leg, and slider connecting rod and rear leg link are hinged on the both sides of their intermediate connection points; One pedal frame, it is configured in left and right back leg on one of them, and below slider along the back leg longitudinal sliding motion; First and second extension springs, they be configured in abreast the band pedal frame back leg vertically, wherein the upper end of first extension spring is contained on the clamping block that is positioned at the back leg upper end, and the other end is contained on the clamping block of pedal frame, the upper end of second extension spring is contained on the slider clamping block, and its lower end is contained on the clamping block of pedal frame; One is contained in the last block that back leg top stops slider to move up; Lock pin on one, it releasably is configured in back leg top, so that stop slider to be moved down by the position that last block blocks from it; One is contained in the following block that the back leg bottom stops pedal frame to move down; Lock pin once, it releasably is configured in the bottom of back leg, so that stop pedal frame to be moved up by the position that block down blocks from it.

Collapsible seating apparatus also comprises: predetermined length is arranged respectively with left and right foreleg, the side lever that left and right back leg and left and right slider connect together; One pedal frame, it is assemblied on one of left and right back leg, and below slider along the back leg longitudinal sliding motion; First and second extension springs, they are configured in the longitudinal direction of the back leg of band pedal frame abreast, wherein the upper end of first extension spring is contained on the clamping block that is positioned at the back leg upper end, and the other end is contained on the clamping block of pedal frame, second upper end of stretching spring is contained on the clamping block of slider, and its lower end is contained on the clamping block of pedal frame; One is contained in the last block of back leg top to stop slider to move up; Lock pin on one, it releasably is configured to back leg top, so that stop slider to be moved down by the place that last block blocks from it; One is contained in the following block of back leg bottom to stop slider to move down; With a lock pin, it releasably is configured to the back leg bottom, is moved up by the place that following block blocks from it to prevent pedal frame.

According to this Collapsible seating apparatus, extension spring and compression spring are set at the back leg the inside, and the clamping block of slider and the clamping block of pedal frame all reach the back leg the inside by the elongated longitudinally guide hole of back leg.

According to this Collapsible seating apparatus, last lock pin and following lock pin are supported by flexible member respectively, so that stretch out from the hole of back leg upper and lower; But also comprise: two swivel plates, they are rotatably fixing with respect to the slider coaxial line, and can turn back to their home position with resiliencely, and two swivel plates are linked on two operating knobs that are arranged in depression bar top with metallic cable separately respectively; Lay respectively at the projection on the swivel plate,, thereby cause that each projection on the swivel plate depresses in the upper and lower lock pin, make it to arrive under the back leg surface a bit because the operation of depressing each operating knob causes each swivel plate to rotatablely move.

According to this Collapsible seating apparatus, wherein extension spring and compression spring all are arranged on the outside of back leg.

According to this Collapsible seating apparatus, extension spring and compression spring comprise coil spring respectively.

According to this collapsible seat tool, it is characterized in that compressing spring and comprise air spring.

According to this collapsible seat tool, remove extension spring after, framework can manually be folded up.

According to this Collapsible seating apparatus, remove the compression spring after, framework can manually be trailed.

According to this Collapsible seating apparatus, lock pin is supported by flexible member, so that extend out to the side of back leg bottom; And also comprise: a swivel plate, it rotatably is contained on the slider, and can flexiblely return its initial position, and swivel plate is linked on the operating knob that is configured in depression bar top with metallic cable; Projection on the swivel plate because the action of depressing operating knob causes the swivel plate spinning movement, thereby causes that the projection on the swivel plate depresses lock pin, makes it to arrive under the back leg surface a bit.

According to this Collapsible seating apparatus, an extension spring of vertically placing along back leg is clamped between the clamping block on clamping block on the slider and back leg top.

According to this Collapsible seating apparatus, one in extension spring and the compression spring is set at the back leg the inside.

According to this Collapsible seating apparatus, one that wherein compresses in spring and the extension spring is set at the back leg outside.

According to this Collapsible seating apparatus, at least one bag in extension spring and the compression spring is coil spring.

According to this Collapsible seating apparatus, the sliding members of being linked on the slider is arranged along the back leg periphery, sliding members reaches the back leg the inside in the elongated guide hole longitudinally along back leg, and the screw rod that slidably its upper and lower is bearing in the back leg the inside screws in the internal thread that places the sliding members in the back leg.

According to this Collapsible seating apparatus, screw rod is placed to the back leg outside.

According to this Collapsible seating apparatus, stop assembly is configured in the upper and lower of back leg, moves up and down in the precalculated position to stop slider.

According to this Collapsible seating apparatus, the switch that starts or stops motor is set at the top of depression bar.

According to this Collapsible seating apparatus, last lock pin and following lock pin are supported by flexible member respectively, so that stretch out the hole of bottom, back leg side; It also comprises: two swivel plates, and they are rotatably fixing with respect to the slider coaxial line, and can flexiblely turn back to their home position, and two swivel plates are linked on two operating knobs that are distributed in depression bar top with metallic cable separately respectively; Lay respectively at the projection on the swivel plate,, thereby cause that each projection on the swivel plate depresses lock pin or time lock pin, make it to arrive under the back leg surface a bit because the action of depressing each operating knob causes each swivel plate spinning movement.

According to the present invention, when slider was positioned at top dead centre, side lever promoted foreleg forward, and leg is opened.Simultaneously, depression bar recedes around the pin joint of itself and armrest rear end, and handrail is in the position of level of approximation, and like this, a seat tool is unfolded.First holding device makes a tool remain on deployed condition.

If push away slider artificially downwards, the slider part that is hinged on side lever and the depression bar vertically moves down along back leg.As a result, foreleg is pulled to back leg, and like this, leg is closed up, and simultaneously, the rear portion of handrail is downward-sloping, and depression bar is brought to stand up position, so that the foldable base tool.Second holding device keeps the seat tool to be in folded state.

On the contrary, if upwards promote slider artificially, the seat tool will be trailed.

According to the present invention, when first holding device is released from extended configuration, the folded spring slider that moves up, like this, a seat tool is got up by auto-folder.Folded spring keeps the seat tool to be in folding dog attitude.

According to the present invention, when second holding device is released from folded state, stretches spring and move down slider, the seat tool is launched automatically like this, stretches spring and keeps the seat tool to be in extended configuration.

According to the present invention, storage facility is respectively each folded spring and stretches spring and store motive force.When releasing device discharged the motive force of folded spring storage, the seat tool was by auto-folder.On the other hand, when releasing device discharged the motive force that stretches the spring storage, a seat tool was launched automatically.

According to the present invention, artificial depressing moved to make folding and stretch spring and is in deflected, thereby motive force is stored in wherein.

According to the present invention, slider can use driven by motor.When motor stopped, the seat tool remained on and stretches or folded state.

According to the present invention, the seat tool is used for the pushchair that baby stroller, wheelchair seat for children or the elderly use.

According to the present invention, when slider was positioned at top dead centre, it contacted with last block there, and side lever promotes foreleg forward.Like this, leg is opened.Simultaneously, depression bar recedes around the pin joint of itself and handrail element rear end, and a seat tool is trailed.

At this extended configuration, last lock pin stops slider to move down.In addition, utilize the elastic force of extension spring and compression spring, pedal frame is pushed to the following end in contact with slider.Pedal frame stops the following end in contact of mobile and maintenance and slider.

If push away pedal frame downwards along back leg, with till following block contacts, extension spring is stretched downwards up to it, and the compression spring is simultaneously to lower compression.At this moment, all stored elastic energy in extension spring and the compression spring.Especially, have one to promote the downward pulling force of slider in the extension spring, and have one to promote the restoring force that pedal frame makes progress in the compression spring.Although there is these power, pedal frame still can not move up because of the following prevention of lock pin, and slider can not move down because of the prevention of last lock pin.

If last lock pin is released, slider is owing to the pulling force of extension spring vertically moves down along back leg.Up to the last end in contact of pedal frame till, slider stops to move.Simultaneously, left and right slider is linked together by side lever, therefore, does not have the slider of pedal frame can move down and arrive dead-centre position too.

Along with moving down of left and right slider, because the effect of side lever separately, left and right foreleg is folding towards back leg.Simultaneously, the part that is hinged of left and right depression bar lower end moves down, the result, and the hinge portion between depression bar and the left and right handrail also moves down, and the handrail element is that pivot rotates with the part that is hinged to the back leg upper end, so that the rear portion of handrail element is downward-sloping.By this way, the seat tool is folded.Finally, the whole framework of seat tool and is laterally remained unchanged by longitudinal folding.

In addition, if lock pin is released down, because the restoring force of compression spring, pedal frame is forced to move down.Simultaneously, pedal frame upwards promotes slider, so that slider returns, up to till last block contacts, slider stops to move then.At this moment, last lock pin can stop slider to move down again.

Because slider moves up, left and right handrail element and the left and right depression bar opposite program of operation when being folded with the seat tool is operated.Left and right foreleg, handrail element and depression bar turn back to their deployed condition.

According to the present invention, a Collapsible seating apparatus can be made into to make it can not only be vertically and can be laterally folded and launch.

When slider is positioned at top dead centre, it contacts with last block at this, and side lever promotes foreleg forward, and like this, leg is opened.Simultaneously depression bar recedes around its pin joint with handrail element rear end, the result, and a seat tool is unfolded, and simultaneously, foreleg side lever, slider connecting rod and rear leg link are also stretched out, and by this way, a tool is also by horizontal spreading.

When whole seat tool launched in the above described manner, last lock pin stoped slider to move down.In addition, though the elastic force of extension spring and compression spring upwards pushes away pedal frame, it still keeps in touch with the lower end of slider.

If pedal frame is stepped and depresses along back leg, with till following block contacts, extension spring will be stretched downwards up to it.Simultaneously, the compression spring also is pressed downward and contracts.At this moment, extension spring and compression spring have been stored elastic energy therein.Especially, extension spring has one to promote the downward pulling force of slider, and the compression spring has one to promote the restoring force that pedal frame makes progress.Although there is these power, pedal frame can not move up because of the following obstruction of lock pin, and slider can not move down because of the obstruction of last lock pin.

At this moment, only mobile pedal frame, slider remains on original position.Foreleg side lever, slider connecting rod and rear leg link keep deployed condition.

If last lock pin is released, slider is owing to the pulling force of extension spring vertically moves down along back leg.Slider connecting rod and rear leg link part about they are connected each other is folding with opposite direction, and slider connecting rod and rear leg link are hinged part central point bending separately, and remove with symmetrical manner each other.As a result, back leg is by laterally folded.

Along with moving down of left and right slider, by means of the side lever that is hinged to respectively on the left and right slider, left and right foreleg is drawn close to back leg.When left and right foreleg and its during being hinged part and being in a straight line of handrail element, they just have been folded.

Combine with these operations, owing to be hinged to the effect of the left and right connecting rod on the left and right side lever, the hinged end of left and right swinging block is around axially rotating down.As a result, left and right second bevel gear that is connected on the swinging block rotates with identical direction.Along with the rotation of left and right second bevel gear, about first bevel gear also begin to rotate, the left and right sides foreleg sleeve that is connected in relative to one another on first bevel gear rotates backward.The foreleg side lever that two ends are connected on the left and right foreleg sleeve is folded in its hinged place, and the foreleg of seat tool is by laterally folded.

By this way, the seat tool is both by longitudinal folding, and the while, the front and back leg was also by laterally folded along with left and right slider moves down.

Then, when lock pin was released instantly, because the restoring force of compression spring, pedal frame was caused to move upwardly.Pedal frame upwards promotes position slider thereon.

Slider moves on to till last block contacts always.Along with moving up of slider, slider connecting rod and rear leg link turn back to their extended configuration, and simultaneously, side lever is that pivot rotates with its part that is hinged to foreleg, so that promote foreleg forward.At this moment, by means of the connecting rod that is hinged on the side lever, swinging block rotates with opposite direction.As a result, first bevel gear rotates so that turn back to their home position, and second bevel gear also rotates, so that antero-lateral rod returns its extended configuration.By this way, the seat tool is simultaneously not only vertically but also laterally returning extended configuration.

According to the present invention, when slider is positioned at top dead centre, it contacts with last block there, and side lever promotes foreleg forward, and leg is opened, and simultaneously, depression bar recedes around the part that it is hinged to handrail element rear end, and the handrail element is brought to the position of level of approximation.By this way, the seat tool has been unfolded.

At this extended configuration, the compression spring upwards pushes away slider, thereby, the slider mobile state that keeps up.

If promote slider with foot-operated frame plate downwards along back leg, because left and right slider connects together with side lever, another slider also moves down along back leg.Side lever is hinged to respectively on the left and right slider, and these left and right side levers also are hinged to respectively on the left and right foreleg because such structure arranged, when left and right slider when back leg moves down, left and right foreleg is drawn close to back leg.Left and right foreleg and left and right back leg rotate around the hinge portion of upper end, so that the front and back leg closes up.

Push away downwards by pedal, slider arrives lower dead center, and it contacts with following block there, and in this lower dead center, lock pin has pinned slider and moved up to prevent it.Even slider is compressed the thrust that spring makes progress, it also remains on lower dead center, and the front and back leg also keeps closing up.

Then, if the lock pin of slider locking is released, because the effect of compression spring restoring force, slider is forced to vertically move up along back leg.Two sliders that connect together with side lever move together, up to left and right slider with till last block contacts.As a result, left and right side lever promotes left and right foreleg forward, so that leg is opened.

According to the present invention, a Collapsible seating apparatus is made into to make it can not only be vertically and can be laterally folded or stretch.

When slider is positioned at top dead centre, it contacts with last block there, and side lever promotes foreleg forward, and leg is opened.Simultaneously, depression bar recedes around the hinge portion of itself and handrail element rear end, the result, and when the handrail element was horizontal substantially, a seat tool was trailed.Simultaneously, foreleg side lever, slider connecting rod and rear leg link are also trailed.By this way, the seat tool also laterally is being unfolded.

At this state, because the compression spring upwards moves slider, so slider remains on top dead centre.

If pedal pushes away one of slider downwards, slider connecting rod and rear leg link around they be hinged each other about part folding with opposite direction, slider connecting rod and rear leg link are hinged part central point bending separately, and remove with symmetrical manner each other, along with this motion, another slider also moves down, the result, and back leg is by laterally folded.By this way, the back leg of seat tool is by laterally folded.Along with moving down of left and right slider, left and right foreleg is drawn close to back leg by means of the side lever that is hinged to respectively on the left and right slider.When left and right foreleg with the hinged member of itself and handrail element point-blank the time, left and right foreleg just is folded.The seat tool is by longitudinal folding.

In addition, along with moving downward of left and right slider, separately hinge portion also moves down between left and right side lever and the connecting rod, causes the swinging block rotation, and first bevel gear rotates with equidirectional, and second bevel gear rotates along with the rotation of first bevel gear.The foreleg side lever is folded at hinge portion, and the foreleg of seat tool is by laterally folded.

When the slider that moves down contacts with following block, with lock pin slider is locked in lower dead center, so that it can not move up.Though slider is compressed the spring restoring force and upwards promotes, they still remain on lower dead center.

By this way, the seat tool is by longitudinal folding, because slider moves down, forward and backward leg is also simultaneously by laterally folded.Because slider pins with lock pin, whole seat tool remains on lock-out state.Then, if the lock pin that engages with slider is released, under the effect of compression spring restoring force, slider is forced in vertically moving up of back leg.Slider moves to till last block contacts.Along with moving up of slider, slider connecting rod and rear leg link are returned their extended configuration.In addition, side lever is that axle rotates around the hinge portion of itself and foreleg, so that promote foreleg forward.Simultaneously, under the effect that is hinged to the connecting rod on the side lever, swinging block rotates with the direction opposite with aforesaid direction of rotation.As a result, first bevel gear rotates with the direction that turns back to their home positions, and second bevel gear also rotates simultaneously, and the foreleg side lever returns its extended configuration.By this way, the seat tool is not only vertically but also laterally turning back to extended configuration.

According to the present invention, when slider was positioned at top dead centre, side lever promoted foreleg forward, and leg is opened.Simultaneously depression bar recedes around its hinge portion with armrest rear end, and when roughly being in level with convenient handrail, a tool is trailed.

When screw rod rotated owing to the starting of motor, the sliding members that drives an internal thread hole that screws with screw rod vertically moved along back leg.Be connected in also vertically the moving down of slider on the sliding members at back leg.

Along with moving down of slider, be hinged to part vertically the moving up or down that is hinged to depression bar on the part of side lever and the slider on the slider at back leg.As a result, foreleg is drawn close towards back leg, perhaps promotes foreleg forward.By this way, forward and backward leg is opened or is closed up.Simultaneously, the handrail element recedes or returns horizontal level, and depression bar is upright forward or recede.

By this way, move by the vertical of slider of following the motor rotation, the seat tool is folded or launches by vertical and horizontal.

According to the present invention, a Collapsible seating apparatus is made into to make it can not only be vertically and can laterally be folded and launch.

When slider was positioned at top dead centre, side lever promoted foreleg forward, and leg is opened.Simultaneously, depression bar recedes around the hinge portion of itself and handrail element rear end.When the handrail element was in the position of level of approximation, the seat tool was unfolded.

When screw rod rotated owing to the startup of motor, drive one vertically moved along back leg with the sliding members of the internal thread hole that screw rod screws.The slider that is connected on the sliding members also vertically moves down at back leg.

Because the moving down of slider, slider connecting rod and rear leg link around they be hinged each other about part folding with opposite direction, slider connecting rod and rear leg link are hinged part around separately central point bending, and remove with symmetrical manner each other.Combination therewith, another slider also moves down, and the back leg lateral dimension reduces.By this way, the back leg of seat tool is by laterally folded.

In addition, along with moving down of left and right slider, by means of the side lever that is hinged on the left and right slider, left and right foreleg is drawn close to back leg.When left and right foreleg and its with the hinge portion of handrail element in line the time, they are folded, the seat tool is by longitudinal folding.

In addition, along with moving down of left and right slider, separately hinge portion moves down between left and right side lever and the connecting rod, swinging block will rotate, because the rotation of swinging block, first bevel gear rotates with identical direction, and second bevel gear rotates with the rotation of first bevel gear.The foreleg side lever is hinged part at it and is folded, and the foreleg of seat tool is by laterally folded.

If motor is with the rightabout rotation of direction of rotation when slider moves down, slider just vertically moves up along back leg.

Along with moving up of slider, slider connecting rod and rear leg link are returned their extended configuration, and side lever is that pivot rotates with the end points that they are hinged on the foreleg, so that promote foreleg forward.Simultaneously, by means of the connecting rod that is hinged on the side lever, swinging block is to rotate in the opposite direction with such rotation side.As a result, first bevel gear rotates with the direction of returning their home positions, and second bevel gear rotates with the rotation of first bevel gear.By this way, the seat tool is not only vertically but also laterally returning extended configuration.

Move by means of the vertical of the slider that is caused by the motor rotation, the seat tool can vertically also can laterally be folded or be unfolded.

According to the present invention, can obtain a two-way folding seat tool.When the seat tool was unfolded, last lock pin stoped slider to move down.In addition, though pedal frame is upwards pushed away by first and second extension springs, it is still slack and keep contacting with slider.

When pedal frame is depressed along back leg, when it contacted with following block, first and second extension springs were stretched downwards.At this moment, first and second extension springs upwards push away pedal frame, and it is downward to promote slider that they have also stored pulling force.Yet following lock pin stops pedal frame to move up, and stops slider to move up and go up lock.

In addition, this moment only can mobile pedal frame, and slider is in the lock state.Foreleg side lever, slider connecting rod and back leg keep extended configuration like this.

If last lock pin is released, slider moves down by means of first extension spring, so that slider connecting rod and rear leg link are folded.By this way, left and right back leg is by laterally folded.

In addition, when slider moved down, by means of the side lever that is hinged on the slider, left and right foreleg was drawn close to back leg.When left and right foreleg and its hinge portion with the handrail element were positioned on the straight line, they were folded, and the seat tool is just by longitudinal folding.

In addition, when left and right swinging block by means of being hinged to left and right connecting rod on the left and right side lever when rotating, second bevel gear that is connected on the swinging block begins to rotate, along with the rotation of second bevel gear, left and right first bevel gear also rotates.The left and right foreleg sleeve that is connected in respectively on first bevel gear rotates backward, and the foreleg side lever that is fixedly connected between the foreleg sleeve is folded at its hinge portion, and the seat tool is by longitudinal folding.

Among these rear leg link and slider connecting rod that left and right back leg is connected together, the two ends of rear leg link are hinged to the top of left and right back leg, and the two ends of slider connecting rod are hinged on the left and right slider.Thereby, when slider when back leg vertically moves down, two hinged ends of slider connecting rod also move down, the result, the slider connecting rod is hinged to the rear leg link center at it and is folded.So that back leg is by laterally folded.

By this way, along with moving down of left and right slider, the framework of seat tool is not only laterally but also vertically be folded.

If following lock pin is released, pedal frame vertically moves up at back leg, and the pulling force by means of first extension spring upwards pushes away slider simultaneously.

Slider moves up, and contacts with last block up to it.Along with moving up of slider, slider connecting rod and rear leg link turn back to their initial, expanded condition, and side lever is that pivot rotates with the hinge portion of itself and foreleg, so that promote foreleg forward.

By means of the connecting rod that is hinged on the side lever, swinging block is to rotate in the opposite direction with such rotation side.As a result, first bevel gear rotates with the direction of returning their initial positions.Simultaneously, second bevel gear rotates, so that the foreleg side lever returns its deployed condition.

Along with moving up of slider, the slider connecting rod two ends that are hinged on the slider also move up, and are linked the deployed condition that the slider connecting rod that is in folded state on the rear leg link is got back to it.By this way, the seat tool returns its initial, expanded condition, and promptly it can be laterally again can be in vertical expansion.

On the other hand, under unidirectional-folding type seat tool situation, left and right slider, left and right foreleg and left and right back leg are fixed together by the side lever that predetermined length is arranged respectively.The seat tool does not move with slider and parts laterally folded or that launch, and therefore, such seat tool framework only can be longitudinal folding or launch.

Fig. 1 is the perspective view of Foldable baby stroller first embodiment; Fig. 2 is the side view of Foldable baby stroller under extended configuration among Fig. 1; Fig. 3 is the side view of Foldable baby stroller under folded state among Fig. 1; Fig. 4 A is the top view (not having indicator board) of slider; Fig. 4 B is the side view of slider; Fig. 4 C is the front view of slider, and Fig. 4 D is the longitudinal sectional view along the C-C line direction of arrow among Fig. 4 A; Fig. 4 E is the perspective view of slider; Fig. 5 A is the perspective view of the back leg of band pedal frame; Fig. 5 B is the side view along the direction pedal frame shown in the D-D line among Fig. 5 A; Fig. 6 A is the back leg profile of symmetry axis longitudinally of band pedal frame; Fig. 6 B is the profile along two swivel plates of E-E line slider among Fig. 6 A.Fig. 6 C is the perspective view with the sheet spring of going up lock pin or following lock pin; Fig. 6 D goes up lock pin or the part perspective view of back leg when lock pin reaches in the hole on back leg surface down.Fig. 7 is the plane of the elongated guide hole of back leg front surface of band pedal frame.Fig. 8 is the longitudinal sectional view of back leg frame when slider and pedal frame all move to top dead centre.Fig. 9 leaves top dead centre and pedal frame when moving to lower dead center, the longitudinal sectional view of back leg frame when slider.Figure 10 is when slider and pedal frame all move to lower dead center, the longitudinal sectional view of back leg frame.Figure 11 is the perspective view of Foldable baby stroller second embodiment when being in extended configuration.Figure 12 is the perspective view when the Foldable baby stroller shown in Figure 11 is in folded state.Figure 13 is the side view when the Foldable baby stroller shown in Figure 11 is in extended configuration.Figure 14 is the side view when the Foldable baby stroller shown in Figure 11 is in folded state.Figure 15 is the front view of Foldable baby stroller shown in Figure 11 when being in extended configuration.Figure 16 is the front view of Foldable baby stroller shown in Figure 11 when being in folded state.Figure 17 is the rearview of Foldable baby stroller shown in Figure 11 when being in extended configuration.Figure 18 is the rearview of baby stroller shown in Figure 11 when being in folded state.Figure 19 A and 19B are mounted in the collapsible Connection Element on depression bar top and the side view of casing component; The collapsible Connection Element that Figure 19 C is mounted in depression bar top is in the plane under the folded state.Figure 19 D and 19E are the side views that is installed to the pull rope device on depression bar top in housing; Figure 20 A is the top view (not having indicator board) of slider.Figure 20 B is the side view of slider.Figure 20 C is the front view of slider.Figure 20 D is along the longitudinal sectional view of C-C line direction among Figure 20 A.Figure 20 E is the perspective view of slider.Figure 21 A is the perspective view of band pedal frame back leg.Figure 21 B is the side view along the pedal frame shown in the D-D line direction among Figure 21 A.Figure 22 A is the back leg cutaway view of symmetry axis longitudinally of band pedal frame.Figure 22 B is the cross-sectional figure along two swivel plates of the slider shown in the E-E line among Figure 22 A.Figure 22 C is the perspective view with the sheet spring of going up lock pin or following lock pin; Figure 22 D goes up lock pin or the part perspective view of back leg when lock pin reaches in the hole on back leg surface down.Figure 23 is the floor map of the elongated guide hole of back leg front surface of band pedal frame.Figure 24 is the longitudinal sectional view of back leg framework when slider and pedal frame all move to top dead centre; Figure 25 be as shown in figure 24 when slider all moves to top dead centre with pedal frame slider be connected the rearview of hinge and back leg side lever.Figure 26 leaves top dead centre and pedal frame when moving to lower dead center, the longitudinal sectional view of back leg frame when slider; Figure 27 is positioned at top dead centre and pedal frame when being positioned at lower dead center as shown in figure 26 when slider, and slider connects the rearview of hinge and back leg side lever; Figure 28 is when slider and pedal frame move to lower dead center, the longitudinal sectional view of back leg frame; Figure 29 is when slider and pedal frame are positioned at lower dead center, and slider connects the rearview of hinge and back leg side lever; Figure 30 is the perspective view that Foldable baby stroller is in the 3rd embodiment of extended configuration.Figure 31 be when Foldable baby stroller is in extended configuration as shown in figure 30 framework one side side view; Figure 32 is the side view that Foldable baby stroller shown in Figure 30 is in a side of folded state; Figure 33 is a Foldable baby stroller shown in Figure 30 front view when being in extended configuration; Figure 34 is a Foldable baby stroller shown in Figure 30 rearview when being in extended configuration; Figure 35 A is the perspective view of slider; Figure 35 B is the side view of slider; Figure 35 C is the top view of slider; Figure 35 D is the longitudinal sectional view that shows the internal structure of back leg along C-C line among Figure 35 C; Figure 36 is when slider moves to top dead centre, the longitudinal sectional view of back leg structure; Figure 37 is slider part rearview when being positioned at top dead centre; Figure 38 is when slider moves to lower dead center, the longitudinal sectional view of back leg structure; Figure 39 is slider part rearview when being positioned at lower dead center; Figure 40 is the schematically showing of another embodiment that replaces the compression spring with extension spring, and when slider is positioned at top dead centre the back leg structure chart; Figure 41 also is the schematically showing of another embodiment that replaces the compression spring with extension spring, and when slider is positioned at top dead centre the back leg structure chart; Figure 42 is the perspective view of Foldable baby stroller the 4th embodiment when being in extended configuration; Figure 43 is a baby stroller shown in Figure 42 perspective view when being in folded state; Figure 44 is a Foldable baby handcart shown in Figure 42 side view when being in extended configuration; Figure 45 is a Foldable baby handcart shown in Figure 42 side view when being in folded state; Figure 46 is a Foldable baby handcart shown in Figure 42 front view when being in extended configuration; Figure 47 is a Foldable baby handcart shown in Figure 42 front view when being in folded state; Figure 48 is a Foldable baby handcart shown in Figure 42 rearview when being in extended configuration; Figure 49 is a Foldable baby handcart shown in Figure 42 rearview when being in folded state; Figure 50 A and 50B are provided to the housing on depression bar top and the side view of shell structure; Figure 51 A is the perspective view of slider; Figure 51 B is the side view of slider; Figure 51 C is the top view of slider; Figure 51 D is that it roughly expresses the internal structure of back leg along the longitudinal sectional view of C-C line among Figure 51; Figure 52 is when slider moves to top dead centre, shows the longitudinal sectional view of back leg structure; Figure 53 is the partial rear view of back leg shown in Figure 52; Figure 54 is when slider moves to lower dead center, the longitudinal sectional view of expression back leg structure; Figure 55 is the partial rear view of back leg shown in Figure 54; Figure 56 is the schematically showing of another embodiment that replaces the compression spring with extension spring, and slider shows the back leg structure chart when being positioned at top dead centre; Figure 57 also is the schematically showing of another embodiment that replaces the compression spring with extension spring, and slider is represented the schematic diagram of back leg structure when being positioned at lower dead center; Figure 58 is the perspective view of Foldable baby stroller the 5th embodiment when being in extended configuration; Figure 59 is the side view that Foldable baby stroller shown in Figure 58 is in extended configuration; Figure 60 is the side view that Foldable baby stroller shown in Figure 58 is in folded state; Figure 61 is the front view that Foldable baby stroller shown in Figure 58 is in extended configuration; Figure 62 A is when slider is positioned at top dead centre, the longitudinal sectional view of back leg, and Figure 62 B is when slider is positioned at lower dead center, the longitudinal sectional view of back leg; Figure 63 A is the partial enlarged drawing of slider and back leg when slider is positioned at top dead centre; Figure 63 B is when slider is positioned at lower dead center, the partial enlarged drawing of back leg (slider is not shown); Figure 63 C is the drawing in side sectional elevation along Figure 63 A C-C line back leg; Figure 64 is the perspective view that Foldable baby stroller is in the 6th embodiment of extended configuration; Figure 65 is the perspective view that Foldable baby stroller shown in Figure 64 is in folded state; Figure 66 is the side view that Foldable baby stroller shown in Figure 64 is in extended configuration; Figure 68 is the front view that the Foldable baby stroller shown in Figure 64 is in extended configuration; Figure 69 is the front view that the Foldable baby stroller shown in Figure 64 is in folded state; Figure 70 is the rearview that the Foldable baby stroller shown in Figure 64 is in extended configuration; Figure 71 is the rearview that the Foldable baby stroller shown in Figure 64 is in folded state; Figure 72 A and 72B are shell structure and the side view that is contained in the collapsible Connection Element in depression bar top; Figure 73 A is when slider is positioned at top dead centre, the longitudinal sectional view of expression back leg structure and slider; Figure 73 B is when slider is positioned at lower dead center, the longitudinal sectional view of expression back leg structure and slider; Figure 74 A is when slider is positioned at top dead centre, the partial enlarged drawing of back leg and slider; Figure 74 B is when slider is positioned at lower dead center, the partial enlarged drawing of back leg; (slider is not shown) Figure 74 C is the cross-sectional schematic diagram of back leg along C-C line among Figure 74 A; Figure 75 is the perspective view that the Foldable baby stroller of four fold-types is in the 7th embodiment of extended configuration; Figure 76 is the perspective view that the Foldable baby stroller of four fold-types shown in Figure 75 is in folded state; Figure 77 is the side view that the Foldable baby stroller of four fold-types shown in Figure 75 is in extended configuration; Figure 78 is the side view that the Foldable baby stroller of four fold-types shown in Figure 75 is in folded state; Figure 79 is the front view that the Foldable baby stroller of four fold-types shown in Figure 75 is in extended configuration; Figure 80 is the front view that the Foldable baby stroller of four fold-types shown in Figure 75 is in folded state; Figure 81 is the rearview that the Foldable baby stroller of four fold-types shown in Figure 75 is in extended configuration; Figure 82 is the rearview that the Foldable baby stroller of four fold-types shown in Figure 75 is in folded state; Figure 83 A and 83B are shell structure and the side view that is contained in the collapsible Connection Element on depression bar top; Figure 83 C is the collapsible Connection Element that the is contained in depression bar top plane when being in folded state; Figure 83 D and 83E are the side views that is installed to the pull rope device on depression bar top at housing; Figure 84 A is the perspective view that the back leg of slider and pedal frame is housed; Figure 84 B is the back leg schematic cross section of cutting open along D-D line among Figure 84 A; Figure 85 A is that top view (no indicator board) Figure 85 B of slider is the side view of slider; Figure 85 C is the front view of slider, and Figure 85 D is the cutaway view along C-C line among Figure 85 A; Figure 85 E is the perspective view of slider; Figure 86 is the fragmentary, perspective view of the back leg of band slider and pedal frame; Figure 87 A is a cutaway view of cutting two swivel plates of slider along E-E line among Figure 86 open; Figure 87 B is the perspective view with the sheet spring of going up lock pin or following lock pin; Figure 87 C is the fragmentary, perspective view that the back leg surface holes of last lock pin or following lock pin is stretched out the place; Figure 88 is the plane that shows the elongated guide hole of the back leg front surface of being with pedal frame; Figure 89 is when slider and pedal frame move to top dead centre, shows the longitudinal sectional view of back leg structure; Figure 90 connects hinge corresponding to the slider that Figure 89 shows to be connected rearview with the state of back leg side lever with the back leg connecting rod; Figure 91 moves to lower dead center and slider when leaving top dead centre when pedal frame, shows the longitudinal sectional view of back leg structure; Figure 92 is the rearview corresponding to the state of connection between the slider connection hinge of Figure 91 demonstration and the back leg connection hinge and back leg side lever; Figure 93 is when slider and pedal frame all move to lower dead center, the longitudinal sectional view of expression back leg structure; Figure 94 shows that corresponding to Figure 93 slider connects the rearview that hinge and back leg connect the state of connection between the hinge and back leg side lever; Figure 95 is folded into the perspective view that two-part baby stroller is in this embodiment of extended configuration; Figure 96 is the side view that the baby stroller of two fold-types shown in Figure 95 is in extended configuration; Figure 97 is the side view that the baby stroller of two fold-types shown in Figure 95 is in folded state; Figure 98 is the side view that Foldable baby stroller is in the 8th embodiment of extended configuration; Figure 99 is the side view that the Foldable baby stroller shown in Figure 98 is in folded state; Figure 100 is the enlarged drawing at the baby stroller major part shown in Figure 98; Figure 101 is the enlarged drawing at the major part shown in Figure 99; Figure 102 A is the schematic diagram that a tool is in extended configuration; Figure 102 B is the schematic diagram that a tool is in folded state; Figure 103 A is the schematic diagram that a tool is in extended configuration; Figure 103 B is the schematic diagram that a tool is in folded state; Figure 104 A is the schematic diagram that a tool is in extended configuration; Figure 104 B is the schematic diagram that a tool is in folded state; Figure 105 A is the schematic diagram that a tool is in extended configuration; Figure 105 B is the schematic diagram that a tool is in folded state; Figure 106 is according to the 9th embodiment of the present invention, the perspective view of the pushchair that the elderly uses; Figure 107 A is presented at the pushchair of extended configuration; Figure 107 B shows the process of pushchair jackknife action; Figure 107 C shows the pushchair that is in folded state; Figure 108 is the side view that the Foldable baby stroller used in the prior art is in extended configuration; Figure 109 is the side view that baby stroller of the prior art is in folded state.

The present invention will do concise and to the point description from embodiment 1 to embodiment 9 to a plurality of embodiment, and their detailed explanations are provided subsequently.

There is different structures to come mobile slider from first embodiment to the, eight embodiment so that a folding or stretching, extension seat tool.In other words, first and second embodiment use two kinds of springs, promptly compress spring and extension spring.When the seat tool is stretched out, promote slider to moving down, two springs have all stored potential energy.Folding and the stretching, extension of seat tool is finished by discharging these required potential energy.Embodiment 1 relates to and is folded into two-part seat tool, and its framework can be longitudinal folding and be stretched.On the other hand, embodiment 2 relates to and is folded into tetrameric seat tool, and its framework is can vertical and horizontal folding and stretch.

Embodiment 3 and embodiment 3 use a kind of compression spring.The seat tool folds by depressing slider, and potential energy is stored in the compression spring as a result.The seat tool launches by discharging these energy, and embodiment 3 relates to and is folded into two-part seat tool, and embodiment 4 relates to and is folded into tetrameric seat tool.

Embodiment 5 and embodiment 6 use electro-motor to come mobile slider so that the foldable base tool.Embodiment 5 relates to and is folded into two-part seat tool, and embodiment 6 relates to and is folded into tetrameric seat tool.

In addition, two extension springs of embodiment 7 utilizations are stored in potential energy in two springs by depressing slider when the seat tool launches, and the folding and expansion of seat tool is finished by discharging required energy.The seat tool of this embodiment comprises two kinds: i.e. two fold-types and four fold-types.

Embodiment 8 is characterised in that the folding of a tool and launches to realize by manual slider.

Referring to figs. 1 through Figure 10, will describe embodiment 1 in detail.

In order to make the notion of inventing shown in the figure more clear, seat and associated annex have all omitted.

As shown in Figure 1, this Foldable baby handcart comprises foreleg 2, and back leg 3, handrail 4, depression bar 5 and side lever 6 all these assemblies are and are symmetrically arranged.Because the right and left all has these assemblies, the structure that is positioned at side member on one side will at first be described.

In Fig. 2, the upper end of foreleg 2 and back leg 3 is hinged with pivot pin 30.Pin 30 is fixed on the handrail 4 on both sides, and handrail 4 has a rectangle U shape cross section and is positioned at the length direction of baby stroller.Foreleg 2 and back leg 3 all center on pin 30 and are the vertical rotation of pivot at baby stroller.Foreleg and back leg all have wheel 11.

There is the Connection Element 41 of rectangle U shape cross section to be installed to the upper end of foreleg 2.The upper end of back leg 3 is sandwiched between the dual-side of Connection Element 41, and the upper end of Connection Element 41 and back leg 3 is hinged by pin 30.If without Connection Element 41, the top of foreleg 2 and back leg 3 can be directly hinged by pin 30.

In this embodiment, foreleg 2 is made by pipe, and back leg 3 is made by the pipe fitting with rectangular cross section.Back leg 3 disposes in such a way, and promptly the axis of bearing pin 30 is vertical with the broadside surfaces of back leg 3.The shape of pipe is not limited to this embodiment.The element of other shape also is available.

Depression bar 5 usefulness pins 31 are hinged to the rear end of handrail 4.Depression bar 5 is made by pipe or analog.As shown in Figure 1, depression bar 5 extends from the rear end of left and right handrail 4, and the top of depression bar 5 takes the shape of the letter U substantially.The curved portion of depression bar 5 links together by being positioned at baby stroller top middle casing 22.Two action button 22a are arranged, 22b on the housing 22.Spacing by pin 30 on the adjustment handrail 4 and 31 can tilt depression bar 5 with desirable angle to the back lower place.

One slider 7 is shown in Fig. 4 A to 4E, and it is slidably installed around the upper periphery of back leg 3.

The identical structure of left and right slider 7,7 will at first be described.Shown in perspective view 4E, slider 7 has biside plate 7a, 7a, and they are with symmetrical manner layout parallel to each other.Shown in Fig. 4 B, biside plate 7a, 7a are linked together by base plate 7b parallel to each other and top board 7c, thereby form a cuboid hole 70, and back leg 3 is slidably by hole 70.

If not being the rectangular cross section pipe, do not make back leg 3.By side plate 7a, 7a, the cross section of the internal cavity 70 that base plate 7b and top board 7e limit corresponds to the cross section of back leg 3 and changes.

Shown in Fig. 4 C, side plate 7a has a cuboid groove 7d and comprises the groove 7f of wedge-like portion 7e.And these grooves 7d and 7f are near the edge of base plate 7b.Remainder around groove 7d forms an expandable part 7g, and an oblique extension 7h along top extension convergent forms in the relative top of side plate 7a with respect to wedge-shaped impression 7f.The extension 7h of side plate 7a is separated each other by top board 7c, and a recessed edge 7k forms between extension 7h and extension 7g.

One through hole 32a is on the top of extension 7h, and a pivot pin 32 that connects depression bar 5 and slider 7 is fixed by through hole 32a.

Shown in Fig. 4 E, the top of two extension 7h, 7h connects together by indicator board 72.Indicator board 72 is fixed on by screw supports part 7i, 7i to be positioned at the screwed hole 72a of extension 7h, 7h outside, among the 72a.

Metallic cable clamping block 75 is installed in the inner surface of indicator board 72, and shown in Fig. 4 D, clamping block 75 is two and keeps the end of rope 23a, 23b to give security that this will be described subsequently.Lockhole 75a is arranged to pin the shell of rope 23a, 23b on each clamping block 75.To allow rope 23a, the metal wire in the 23b passes through one through hole 75b after lockhole 75a.

One thrust 7j is in side plate 7a bottom, exceeds outside the base plate 7b so that stretch out downwards, is drilled with a through hole 34a on the projection with fixed pivot axi pin 34.As shown in Figure 2, side lever 6 is hinged to the top of foreleg 2 by pivot pin 33.The rear end of side lever 6 is connected on the pivot pin 34 of projection 7j.As a result, side lever 6 restriction forelegs 2 and back leg 3 so that they separate each other.And as described in subsequently, if slider 7 vertically moves along back leg 3, side lever 6 can cause foreleg 2 folding.

Shown in Fig. 4 A or 4E, slider 7 is provided with under the situation of pedal frame 9, and a clamping block 17 vertically is installed in the center at base plate 7b edge, and an elongated hole 73 vertically is arranged at the center at top board 7C edge, and it is positioned at the direction that back leg inserts slider 7.Shown in Fig. 4 D, a groove 74 is tapers, aligns with hole 73, and to the corresponding end of top board 7C, so that the darkest part is positioned at and elongated hole 73 rightabout top board ends, the most shallow part is close to elongated hole 73 from the inner end of elongated hole 73.This has guaranteed a space, and cone tank 74 outermost end on its top board 7C that coexists at least and the maximum ledge of the last lock pin 16a between back leg 3 surfaces are equally big.Lock pin 16 will be described subsequently on one, its in the process that slider 7 moves upward along back leg 3 by cone tank 74, thereby last lock pin 16a is compressed below the arrival back leg 3 a bit.Reach moment of elongated hole 73 at last lock pin, last lock pin 16a stretches out from the surface of back leg 3.Last lock pin 16a is locked to the inner end of elongated hole 73, will stop slider 7 to move down like this.(seeing Fig. 6 A)

Last block 14 with rectangular cross section is installed in a side on the top of left and right back leg 3, shown in Fig. 1 or 2.Block is fixed on the back leg 3 with screw or pin 14a or analog on this, and the expandable part 7g of slider 7 is directed keeping slidably contact with the same block 14.When the recessed edge 7K of slider 7 contacted with last block 14, slider 7 will stop to move upward.

Shaft supporting part 47 is fixed on the axle of the lower end of left and right back leg 3 with support wheel 11, and shown in Fig. 5 A, once retainer is fixed on the back leg 3 with screw or pin 15a, the last end in contact of its lower end and shaft supporting part 47.

In Fig. 1, side lever 8a is fixed on the foreleg sleeve 43, and sleeve 43 is fixed on the left and right foreleg 2.Similar at this, a side lever 8 is connected a left side, and between the right slider 7, a side lever 86 is connected between the following block 15 that is fixed in left and right back leg 3 lower ends.Side lever 8,8a and 8b layout parallel to each other.Thereby can guarantee the symmetry and the rigidity of left and right sides.

The fold mechanism of this embodiment will be described in detail, and concentrate on especially on the left back leg 3 (to be called back leg after this) when seeing baby stroller from back to front.The main strength of fold mechanism is provided by left back leg 3, operates so conveniently.Certainly, right rear leg 3 also can provide main strength.

Shown in Fig. 5 A, slider is at the top of back leg 3, and pedal frame 9 is installed so that can longitudinal sliding motion on back leg 3 around back leg 3.

Projection 9a comprises the part 9b that splays, and 9b is in the upside of pedal frame, and the part of splaying 9b is corresponding to the tapering part 7e of slider 7.When pedal frame 9 is up mobile, the tapering part 7e each other slidably contact of part 9b of splaying of pedal frame 9 with slider 7.As a result, by the interlocking of these tapering parts, pedal frame 9 stop motions.

On the other hand, when pedal frame 9 when back leg 3 moves down, the lower end of pedal frame 9 and the last end in contact that is fixed on the following block 15 of back leg 3 bottoms, pedal 9c is contained in the outer surface of pedal frame 9 so that outwards give prominence to.When whole pedal frame need move down, the user can be placed on their pin on the pedal 9c and depress pedal frame 9.

One pins the center that element 19 is vertically fixed in inner bottom plating 9d edge, and inner bottom plating 9d is clamped between the projection 9a of pedal frame 9.Shown in Fig. 5 B, the upper end that a locking bar 19b who stretches out from clamping block 19 lower ends is used for pinning the compression spring 13 that will describe subsequently.

Fig. 6 A is back leg 3 cutaway view of symmetry axis longitudinally of band pedal frame 9.Among the figure, slider 7 keeps in touch at the same block 14 of top dead centre, and pedal frame is in lower dead center block 15 contacts down together.

Fig. 7 is the plane of front surface of the back leg 3 of band pedal frame 9.Until roughly being the position at center, the lower end is provided with an elongated guide hole 10 from the upper end of back leg 3 front surfaces.

In Fig. 6 A, the clamping block 17 of slider 7 and the clamping block 19 of pedal frame 9 reach the inside of back leg 3 by elongated guide hole 10.The clamping block 17 of slider 7 is installed in the upper end 12a of extension spring 12, and the clamping block 19 of pedal frame 9 is installed in the lower end 12b of extension spring, extension spring is fixed with general fashion, and promptly the end of spring 12 is hooked to the groove 17a last (Fig. 4 d) of clamping block separately and pins on the groove 19a of element 19.

In conjunction with aforesaid structure, slider 7 and pedal frame 9 are linked together by extension spring 12.

The upper end of compression spring 13 is fixed on the locking bar 9b that stretches out from pinning element 19 lower ends of pedal frame 9 and goes up (seeing Fig. 5 A).The lower end of compression spring 13 contacts with the bottom 3C of back leg 3.Like this, compression spring 13 is clamped between the bottom 3C of pedal frame 9 and back leg 3.Be fixed on the locking bar its upper end by a locking bar (not shown) being provided again and the lower end of compression spring 13 being resembled in the same way, and it is kept upright on the 3C of the bottom of back leg 3.

Although helical spring is as extension spring 12 and compression spring 13 in above structure, other plants a flexible member, also can be used to compress spring 13 as gas spring, in gas spring, a piston rod moves around under the effect of compression pressure in gassiness piston/cylinder.

Extension spring 12 and compression spring 13 are contained in the back leg 3 with above-mentioned configuration mode.Yet spring 12,13 can place the outside of back leg 3, and in this case, though do not illustrate in the drawings, the clamping block 17 of slider 7 and the clamping block 19 of pedal frame 9 can be placed on the outside of back leg 3.One ledge is arranged on the outside of back leg 3 lower ends, and extension spring 12 is between the clamping block of slider 7 and pedal frame 9.Compression spring 13 or gas spring can place between the ledge of the clamping block of pedal frame 9 and back leg 3.

Hole 3a (seeing Fig. 6 D) is positioned at the side of back leg 3, when slider is positioned at the same block 14 of top dead centre and keeps in touch, so that hole 3a aims at the inner end of the elongated hole 73 of the top board 7c of slider 7.As shown in Figure 6A, a spring cavity 44a is positioned at back leg 3 the insides corresponding to hole 3a, and a folding sheet spring 45a places in this spring cavity 44a.Shown in Fig. 6 C, on the sheet spring 45a lock pin 16a is housed, last lock pin 16a stretches out hole 3a under sheet spring 45a supporting with resilience.

On the other hand, when pedal frame was positioned at lower dead center and block 15 keeps in touch down together, the hole 3b on the side of back leg 3 aimed at the top edge of pedal frame 9.As shown in Figure 6A, as spring cavity 44a.One spring cavity 44b is positioned at back leg 3 the insides corresponding to hole 3b.Once lock pin 16b is contained on the sheet spring 45b, and shown in Fig. 6 C, and lock pin 16b stretches out hole 3b under sheet spring 45b supporting with resilience, shown in Fig. 6 D.

Two extension 7h of slider 7 are equipped with two swivel plates 20 and 21 that supported by bolster 78 respectively, shown in Fig. 6 B.Swivel plate 20 and 21 independently rotates and returns the home position by means of the torque spring (not shown).One excircle otch 20b and 21b arranged respectively on the swivel plate 20 and 21.On excircle otch 20b and 21b, pin 25a and 25b fix the rope 23a that is centered around on swivel plate 20 and 21 circumference and the initiating terminal of 23b with the direction opposite with direction of rotation for metallic cable 23a and 23b.In addition, swivel plate 20 and 21 has a projection 20a and a 21a respectively.As shown in Figure 6A.

Metallic cable 23a and 23b are connected respectively on the operating knob 22a and 22b on depression bar 5 tops, as shown in Figure 6A by the depression bar internal cavity.The internal structure of operating knob 22a and 22b is omitted in the drawings.Yet the end of metallic cable 23a and 23b is locked on the excircle of pulley (not shown), and along with depressing of operating knob 22a and 22b, these pulleys will rotate. Metallic cable 23a and 23b are stretched, and as the stretch result of action of metallic cable 23a and 23b, swivel plate 20 and swivel plate 21 have one will rotate around bolster 78 among both.There is one also can rotate among swivel plate 20 and 21 projection 20a and the 21a.Corresponding upward lock pin 16a or following lock pin 16b are depressed, and be more subsurface thereby lock pin enters back leg 3.

When slider 7 (representing with imaginary line Fig. 6 A) when low spot upwards moves lofty perch, the cone tank 74 of slider 7 top board 7e inner surfaces is depressed lock pin 16a, thereby lock pin is reached under the surface of back leg 3 a bit.As shown in Figure 6A, thereby moving upward of slider 7 can be stoped by last lock pin 16a.

According to this embodiment, the operation with Foldable baby handcart of said structure will be described later.

Fig. 8 is slider 7 and the pedal frame 9 that is positioned at top dead centre, and the state of slider and pedal frame is corresponding to the state of seat tool shown in Figure 2 among this figure.Side lever 6 promotes foreleg 2 forward, causes leg to open.Simultaneously, depression bar 5 recedes around the pivot pin 31 that is fixed on handrail 4 rear ends, and baby stroller is just trailed.

Be in the baby stroller of extended configuration as shown in Figure 8, last block 14 stops slider 7 to move up.Last lock pin 16a stretches out the outside so that engage (seeing Fig. 6 A) with the elongated hole 73 of slider 7, and keep in touch the inner end of last lock pin 16a and elongated hole 73, and like this, slider 7 can not upwards can not move down.

Though pedal frame 9 since the screen resilience of extension spring 12 and compression spring 13 be caused to move upwardly, when the following end in contact of it and slider 7, just slack.

In Fig. 8, when pedal frame 9 is positioned at top dead centre, following lock pin 16b is depressed by the inwall of pedal frame 9.Thereby following lock pin can not stop moving down of pedal frame 9.

If pedal frame 9 down pushes away along back leg, with till block 15 contacts down, as shown in Figure 9, the following lock pin 16b that the top edge of pedal frame 9 stretches out with the screen resilience that discharges by means of the sheet spring 45b that is in compressive state is connected up to it.At this moment, pedal frame 9 can not move up and be in the lock state.

Under this state, extension spring 12 downward extension elongations, and compression spring 13 shrinks to lower compression.At this moment, elastic potential energy is stored in extension spring 12 and compresses 13 li on spring.Especially, extension spring 12 has one to force the downward pulling force of slider, and compression spring 13 has a restoring force that forces pedal frame 9 to make progress.Following lock pin 16b stops pedal frame 9 to move up, and stops slider 7 to move down and go up lock pin 16a, and by this way, pedal frame 9 and slider 7 are in the lock state.

When depress operating knob 22a and 22b wherein any, when causing swivel plate 20 to rotate, the projection 20a of swivel plate 20 depresses lock pin 16a.Slider 7 discharges from lock-out state.At this moment, the pulling force of extension spring 12 discharges.Slider 7 moves down along back leg 3.As shown in figure 10, when the lower end of slider 7 contacted with the top edge of pedal frame 9, it just stopped to move.Left and right slider 7 is connected together by side lever 8 in whole operation, thereby does not have pedal frame 9 sliders 7 also can move down.

Along with moving down of left and right slider 7, left and right foreleg 2 is folding towards two back legs 3 by means of two side levers 6, as shown in Figure 3.Simultaneously, the hinge portion between slider 7 and the depression bar 5 (two pivot pins 32) moves down, and causes the hinge portion (two pivot pins 31) between depression bar 5 and the left and right handrail 4 also to move down.Cause the hinge portion (two pivot pin 30) of two handrails 4 between handrail 4 and back leg 3 upper ends to rotate.The rear portion of handrail 4 is downward-sloping.Like this, the whole framework of baby stroller is only longitudinal folding, as shown in Figure 3.

When another button caused swivel plate 21 rotations moving in depressing operating knob 22a and 22b, as shown in figure 10, the projection 21a of swivel plate 21 pressed down lock pin 16b, so that pedal frame 9 can discharge from lock-out state.At this moment, the restoring force of compression spring 13 is released, and pedal frame moves up.Simultaneously, pedal frame 9 promotes sliders 7 and upwards moves, and causes slider 2 to contact with last block 14 and enters lock-out state.At this moment, last lock pin can stop slider 7 to move downward again.

Along with slider 7 moves up, left and right handrail 4 and left and right depression bar 5 are to operate with their folding movement opposite way.As a result, left and right foreleg 2, left and right handrail 4 and left and right depression bar 5 turn back to extended configuration as shown in Figure 2 again.

In said structure, can be in the back leg 3 without extension spring 12.When pedal frame 9 when moving down into lower dead center, be not applied in downward power on the slider 7, thereby framework can not fold.Yet manually folding if framework is designed to, baby stroller does not need extension spring 12.

In said structure, if compression spring 13 is removed from back leg.When pedal frame has moved to lower dead center and when lock-out state discharges, the restoring force that makes progress will can not be applied on the pedal frame 9.Because this point, slider 7 does not move up, thereby framework can not trail.Yet if framework is designed to manual expansion, baby stroller does not just need to compress spring 13.

With reference to Figure 11 to 29, second embodiment is described as follows:

For making principle of the present invention more clear in the drawings, seat and relevant annex all have been omitted in the drawings.

As shown in figure 11, this Foldable baby handcart comprises foreleg 2, back leg 3, handrail element 3, depression bar 5 and side lever 6.All these elements have constituted half of and right one side of something in a left side of baby stroller.Because these elements all have at two sides of handcart, and the formation of the side members of handcart at first only is described with a side.

In Figure 13, the upper end of foreleg 2 and back leg is articulated on the pivot pin 30.Pivot pin is fixed in the both sides of handrail element 4, and handrail element 4 has a rectangle U shape cross section, and is positioned at the longitudinal direction of baby stroller.Foreleg 2 and back leg 3 are the longitudinal direction rotation of pivot at baby stroller with pin 30, and foreleg 2 and back leg 3 all are equipped with wheel 11.

Connection Element 41 is a rectangle U shape cross section, and it is fixed in the upper end of foreleg 2.The upper end of back leg 3 is clamped in the both sides of Connection Element 41, and the upper end of Connection Element 41 and back leg 3 is hinged with pivot pin 30.If without Connection Element 41, the upper end of foreleg 2 and back leg 3 is just directly hinged with pin 30.

In the present embodiment, foreleg 2 is made by a pipe, and back leg 3 is that the pipe fitting of rectangle is made by a cross section.The layout of back leg 3 should make the axle of pin 30 on the normal direction of its broadside side.The shape of pipe fitting not only is confined in the present embodiment to be adopted, and this element also can adopt other shape.

Depression bar 5 is fixed on the rear end of handrail element 4 by pin, and depression bar 5 is made by pipe or analog.Depression bar 5 recedes by desired angle by pin 30 on the adjusting handrail element and 31 spacing.As shown in figure 13, one sleeve 5b is fixed on the upper end of depression bar 5 with a screw or a pin, and in the outer circumference of sleeve 5b to an elongated guide hole 5c is arranged, the screw or the pin that are fixed on the folding rod 5a fit on the sleeve 5b, its head is engaged on the elongated guide hole 5c, like this, folding rod 5a is rotated in a circumferential direction along depression bar.

As shown in figure 15, the sub-assembly of depression bar 5 and folding rod 5a is configured in the both sides with respect to baby stroller lengths of frame direction center line.Left and right folding rod 5a is hinged to respectively on the Connection Element 60, and Connection Element 60 is positioned at the both sides of button housing 22, and button housing 22 is configured in the upper end of cart frame longitudinal center by pin 60c.Like this, can be by the framework that folds back along depression bar 5 rotation left and right sides folding rod 5a, as shown in figure 12.

With reference to Figure 19 A-19C, the foldable structure of Connection Element 60 is explained.Housing 61 (illustrating with imaginary line) is contained in the button housing 22, and for each Connection Element 60, element 60 is to be made of inner member 60a that is combined into collapsible shape and outer member 60b.Inner member 60a is fixed on the housing 61, and outer member 60b is fixed on the folding rod 5a.Inner member 60a and outer member 60b are hinged to folding structure in the cardinal principle horizontal direction by pin 60c.

On inner member 60a, open a through hole 60d, same, a patchhole 60e is externally arranged on the element 60b.Left and right connecting rod 62a and 62b that the back will illustrate insert among through hole 60d and the 60e simultaneously.Because left and right bar 62a and 62b insert through hole 60b, 60e, inner member 60a and outer member 60b just are lockable, like this, and just folded interior and outer member again.

When left and right bar 62a and 62b are moved to the center of housing 61, inside and outside the element 60a and the 60b that are positioned at button housing both sides are just discharged from lock-out state, thereby folding rod 5a just can become and can freely fold 3 in general horizontal direction with respect to button housing 22.

Button housing 22 is made of a horizontal mobile mechanism and haulage gear, and horizontal mobile mechanism comprises left and right bar 62a, the 62b shown in Figure 19 A and the 19B, and haulage gear comprises the metallic cable 23a shown in Figure 19 D and the 19E, 23b.For making diagram clear, Figure 19 A to 19E has represented each mechanism respectively.But, these mechanisms are installed in the housing 61 entirely.

Shown in Figure 19 A and 19B, elongated hole 61a (illustrating with imaginary line) is positioned at the center of housing 61 substantially.Two operating knob 22a and 22b place the lower position of housing 61, and they can turn round the downward restoring force of compression spring 22c, 22d among 22a and the 22b and vertically move by being included in separately operation.One lock pin element 63a and pivot pin element 63b are arranged in juxtaposition, and protrude upward along operating knob 22a and 22b separately.

In housing 61, the horizontal slideway 61b in upper and lower is arranged, and guide runner 64a and 64b place respectively in the horizontal slideway 61b, and can be along the slideway horizontal slip.Above-mentioned bar 62a and 62b are separately fixed at the outer ledge of guide runner 64a and 64b.As previously shown, bar 62a and 62b enter among the patchhole 60e on the left and right outer member 60b by the through hole 60d on the left and right inner member 60a.

Lock pin element 63a on the close operating knob 22a in the corner that makes guide runner 64a has opened an oblique elongated hole 65a on it, similarly, also opened an oblique elongated hole 65b, so that the corner of guide runner 64b is near the lock pin element 63a on the operating knob 22b.Establish a guide finger 69 among the elongated hole 61a on housing 61, similarly, vertically establishing guide finger 69 among elongated hole 65a and the 65b.Guide finger 69 can also enter in the groove that is located at lock pin element 63a top.Guide runner 64a and 64b are respectively by spring 59a, and 59b utilizes its rightabout tractive force of the front end with bar 62a and 62b that has to push.As explained above, the horizontal mobile mechanism that is positioned on left and right operating knob 22a and the 22b is symmetrically distributed on the Center Length direction of baby stroller framework.From Figure 19 B as can be seen, for example, if click left operating knob 22a, the guide finger 69 that is located on the lock pin element 63a moves up along the elongated hole 61a that is positioned on the housing 61, and similarly, guide finger 69 and then moves in the oblique elongated hole 65 that is arranged on the left guide runner 64a.Like this, guide runner 64a moves right along horizontal slideway 61b.Along with moving right of guide runner, the left bar 62a that is fixed on the left guide runner 64a also moves right, thereby the patchhole 60c of the front end of left bar 62a on being arranged in left outer member 60b shifts out, and like this, left Connection Element 60 just becomes collapsible.

Along with left operating knob 22a is pressed down, this a series of operation makes right slideway 64b and right bar 62b move in the mode of sample equally.Therefore, only by pushing left operating knob 22a, it acts on left and right sides Connection Element 60, and two bar 62a, 62b are inwardly moved.Like this, just can be generally along the folding simultaneously left and right sides folding rod 5a5a (seeing Figure 19 C) of horizontal direction.

Right operating knob 22b, right guide runner 64b, right bar 62b are structurally identical with its corresponding left side.Right operating knob 22b and left operating knob are operated by same mode.Thereby, no matter be that left operating knob is pressed, still right operating knob 22b is pressed, and left and right connecting rod 62a and 62b all move inward.

It is in order to draw two metallic cable 23a and 23b respectively that operating knob 22a, 22b are provided with separately.

Shown in Figure 19 D, 19E, for making pulley 66a and 66b separately along their central shaft 67a and 67b rotation, they are arranged side by side in housing 61.Metallic cable lock pin 23c and 23d are used for the front end of metallic cable 23a and 23b is separately fixed at above it, and the metallic cable lock pin is separately fixed on the outer rim of pulley 66a, 66b.In addition, lock pin 68a and 68b are fixed on the excircle of pulley 66a and 66b.These lock pins 68a and 68b combine with pin 63a and 63b rotationally, pin 63a and 63b stretch out from operating knob 22a and 22b, like this, each pulley 66a, 66b just can move upward and rotate around central shaft 67a, 67b along with operating knob 22a, 22b, so metallic cable 23a, 23b just have been pulled.

Metallic cable 23a, 23b pass the inside of folding rod 5a and depression bar 5, and are drawn by the slider 7 that the back will be described.Like this, trailed metallic cable is respectively on two swivel plates 20 that place slider 7 and 21.The traction of corresponding metal rope 23a, 23b is caused by the action of depressing of operating knob 22a, 22b.As previously mentioned, no matter be operating knob 22a pressurized, or operating knob 22b pressurized, left and right bar 62a and 62b all move inward simultaneously, like this, just can fold left and right folding rod 5a and 5a in the same way, as shown in figure 12.

Shown in Figure 20 A to 20E, slider 7 is disposed at the periphery on back leg 3 tops in a movable manner.The identical construction of left and right slider 7 will at first be illustrated.Shown in perspective view 20E, slider 7 is made of biside plate 7a, and side plate 7a is arranged in parallel with symmetrical manner.Shown in Figure 20 B, side plate 7a is connected with the top board 7C that base plate 7b reaches with base plate is parallel to each other, and forms hole 70 in the rectangle, so that can pass back leg 3 in the mode of sliding.

If back leg 3 is not to be made by the rectangular tube with rectangular cross section, the shape of cross section in interior hole 70 according to the shape of back leg 3 cross sections by slider 7a, base plate 7b, top board correspondingly changes and forms.

Shown in Figure 20 C, rectangular recess 7d is arranged on the side plate 7a, comprise the groove 7f of wedge-like portion 7e.And the edge of groove 7d, 7f and base plate 7b is close.Remainder around groove 7d forms an expandable part 7g.The one oblique extension 7h along top extension convergent forms in the relative top of side plate 7a with respect to wedge-shaped impression 7f.The extension 7h of side plate 7a is spaced apart by top board 7c.Form a recessed edge 7k between extension 7h and expandable part 7g, open a through hole 32a on the top of extension 7h, like this, pivot pin 32 just can link together depression bar 5 and slider 7 by through hole 32a.

Shown in Figure 20 E, the top of two extension 7h is connected together by indicator board 72.This indicator board is connected by screw with support section 7i, and 7i is located at the outside of extension 7h, and screw 72a is arranged on it.

Shown in Figure 20 D, metallic cable clamping block 75 is contained in the inner surface of indicator board 72.This metallic cable clamping block 75 is to be provided with for the end of fixing above-mentioned metallic cable 23a and 23b.On each metallic cable clamping block 75, open a lockhole 75a, so that pin the shell of metallic cable 23a and 23b.And offer a through hole 75b at the inner face of lockhole 75a, so that the wire among each metallic cable 23a and the 23b passes through.

Establish a ledge 7j in the bottom of side plate 7a,, offer a through hole 34a on the ledge 7j downwards, to place a pin 34 so that stretch out outside the base plate 7b.As shown in figure 13, side lever 6 is hinged to the top of foreleg 2 by a pin 33, and the rear end of side lever 6 links to each other with pin 34 on the ledge 7j.Like this, side lever 6 just can support foreleg 2 and back leg 3, so that they keep certain intervals mutually.In addition, will illustrate in the back that if slider 7 is vertically moved along back leg 3, then side lever 6 just can make foreleg 2 fold up.

The special construction of the slider 7 on one back leg 3 (back is called back leg 3) has the pedal frame 9 that the back will illustrate.Except structure above-mentioned, shown in Figure 20 A or 20E, a clamping block 17 is established at its length direction center in edge around base plate 7b, and opens an elongated hole 73 around the edge of top board 7c at its length direction center, goes so that back leg 3 can be inserted in the slider 7.Shown in Figure 20 D,, offer a wedge-shaped slot 74 at the inner surface of top board 7c along the straight line at elongated hole 73 places.

Wedge-shaped slot 74 is to make wedge shape from the inner end of elongated hole 73 to top board 7c opposite end to form, so that its deepest part is in the relative direction of top board edge and elongated hole 73, and its shallow portion is just fitted with elongated hole.The outermost end that so just can guarantee the wedge-shaped slot 74 on the top board 7c is the same roomy with the maximum extension elongation of last lock pin 16a at least with the distance between back leg 3 surfaces.Lock pin 16a will be explained below on one, and in the process that slider 7 moves up along back leg 3, last lock pin 16a at first passes wedge-shaped slot 74, and like this, last lock pin 16a just can be pressed into the position that is lower than back leg 3 surfaces.When elongated hole 73 moved, last lock pin just stretched out from the surface of back leg 3 at last lock pin 16a.Last lock pin 16a is promptly pinned by the inner end of elongated hole 73, will stop slider 7 to move down (seeing Figure 22 A).

One cross section is the last block 14 of rectangle, shown in Figure 11 or 12, is attached on one side, top of left and right sides back leg 3.It is fixed on above the back leg 3 by a screw or pin and analog.Shown in Figure 21 A, last block 14 is fixed on the back leg 3, is slidably so that make between the long limit of expandable part 7g on itself and the slider 7.When slide block device 7 when back leg 3 moves up, it is mobile under the situation with last block 14 sliding-contacts that the expandable part 7g above the slider 7 just can keep.In the recessed edge 7k contact on slider 7 of moving up of slider 7 till the block 14.

A supporting part 47 is fixed in each terminal bottom of left and right back leg 3, and shown in Figure 21 b, it is used for the axle of support wheel 11.Once block 15 is fixed on the back leg 3 by a screw or pin, and its lower end is contacted with the upper end of axle supporting 47.

Shown in Figure 15 or 16, foreleg sleeve 43 is installed in rotation on the precalculated position of left and right foreleg 2,2 bottoms.Especially, one pin or screw 43b (seeing Figure 16) are fixed on predetermined foreleg bottom and its head is reached the outside, open an elongated hole 43a at foreleg sleeve 43 upper edge hoops, the head of screw 43b is fixed in the above, like this, foreleg sleeve 43 just can rotate in the length range of elongated hole 43a.

In addition, as shown in figure 15, left and right foreleg sleeve 43,43 is connected together by a foreleg side lever 54, and foreleg side lever 54 is made of left and right side rod element 54a and the central side rod element 54b that is clipped between them.Left and right side rod element 54a, 54a and central side rod element 54b are hinged together by two pin 54c.Left and right foreleg sleeve 43,43 is rotation backward in the opposite direction, and like this, side lever 54 just can fold back into U-shaped (seeing Figure 12) along left and right sides pin 54c.

In Figure 15, the first bevel gear 50a, 50a are assemblied in respectively on the excircle of foreleg sleeve 43,43.The following describes among the first bevel gear 50a, the 50a.The second bevel gear 50b that is meshed with the first bevel gear 50a is fixed on the outside of foreleg 2, so that it rotates (seeing Figure 13) around pin 51a.Swinging block 51 stretches out from the second bevel gear 50b.

In addition, as shown in figure 13, two ends curved a L shaped connecting rod 52 rotatably be hooked near swinging block 51 front ends through hole 51b and between the through hole 66 of certain point on the side lever 6.

According to this structure, as shown in figure 14, when longitudinal direction moved down, swinging block 51 was driven by connecting rod 52 and rotates (direction shown in arrow among Figure 13) along clockwise direction the left and right slider 7,7 that will illustrate when the back along back leg 3,3, and connecting rod 52 can be seen from the baby stroller side.Like this, the second bevel gear 50b just inwardly rotates in the back of framework along the first bevel gear 50a, the result, and left and right foreleg sleeve 43,43 rotates backward respectively.Foreleg sleeve 43 rotation backward makes foreleg side lever 54 be folded into U-shaped.Like this, baby stroller just can be by laterally folded.

In addition, (Figure 17 is a rearview) as shown in figure 17, left and right back leg 3,3 is connected as a single entity by back leg side lever 55, and back leg side lever 55 is made of left and right side rod element 55a, 55a.These side lever elements 55a, 55a are hinged together in a certain end by a pin 55b, so that it can be along upwards folding on the center longitudinal direction of the axle of baby stroller.The two ends of the side lever element 55a that is hinged and left and right following block 15,15 are hinged rotationally, and following block 15,15 is fixed on the bottom of back leg 3,3 by pin 55C.

In addition, as shown in figure 17, left and right slider 7,7 is connected together by a slider connecting rod 56, and this slider connecting rod 56 is made of two V-arrangement folding rod 56a, 56a.The hinge point that these folding rods 56a, 56a arrange them up.Folding rod 56a, 56a are hinged to rotationally along the central longitudinal between the back leg 3,3 by a pin 56b.The two ends of folding rod 56a, the 56a that is hinged link to each other with left and right slider 7,7 respectively, so that it rotates respectively around pin 56c, and can make slider connecting rod 56 the longitudinal direction of baby stroller along its center hinge portion move up and turn to folding, as shown in figure 18.

Left and right back leg 3,3 connects together by the top of rear leg link 57 at slider 7,7.As slider connecting rod 56, this rear leg link 57 is made of left and right V-arrangement folding rod 57a, 57a.These folding rods 57a, 57a are rotatably linked together by pin 57b, and the two ends of connected folding rod 57a are hinged with left and right last block 14,14 respectively, be fixed on the left and right back leg 3,3 by pin 57c, 57c and go up block 14, can make rear leg link 57 folding in the same plane of the longitudinal direction of baby stroller like this.For making rear leg link 57 opposite with the folding direction of slider connecting rod 56, left and right folding rod 57a, 57a should arrange their hinge portion down.

Slider connecting rod 56 and rear leg link 57 are connected together at two hinge portions by two pins 58,58, and make them when being folded, and its center hinge portion is removed mutually.

By means of this structure, as shown in figure 17, when the baby stroller horizontal spreading, the slider 7 that will be explained below places top dead centre, and deployment slider connecting rod 56 and rear leg link 57 make it on same straight line, on the other hand, left and right slider 7,7 will be explained below, when baby stroller when laterally folded, slider 7 is to being displaced downwardly to lower dead center.As shown in figure 18, slider connecting rod 56 and rear leg link 57 are folded up by pin 58,58, and it is mobile that center hinge portion 56b and 57b can be staggered on the longitudinal direction of baby stroller mutually.

Fold mechanism in the present embodiment will be described in detail, and particularly be located at the pedal frame that will illustrate in the back 9 on the left back leg 3, and the major impetus of fold mechanism can make easy to operate from left back leg 3 like this.Certainly, major impetus also can derive from right rear leg 3.

Shown in Figure 21 A, slider 7 places the top of back leg 3, and is equipped with pedal frame 9 on back leg 3, and makes them can be along back leg 3 longitudinal sliding motions.Projection 9a, 9a comprise wedge- like portion 9b, 9b, 9b be positioned at pedal frame 9 above, and wedge- like portion 9b, 9b are corresponding with wedge- like portion 7e, 7e on the slider 7.When pedal frame 9 moves up, the slip that cooperatively interacts of wedge-like portion 7e, the 7e on the wedge-like portion 9b on the pedal frame 9,9b and the slider 7, the result, these wedge-like portion interlockings, pedal frame 9 promptly is braked.

On the other hand, when pedal frame 9 when back leg 3 moves down, the lower end of pedal frame 9 will touch the upper end of the following block 15 that is fixed on back leg 3 bottoms.Adorn a pedal 9c at the outer surface of pedal frame 9, and stretch out.When whole pedal frame 9 was moved down, the user can depress pedal frame 9 with riding on pedal 9c.

Shown in Figure 21 B, a clamping block 19 is vertically fixed on the center edge by the inner bottom surface 9d of two projection 9a on the pedal frame 9,9a clamping.The locking bar 19b bottom of clamping block 19 since then stretches out, and pins the upper end of compression spring 13 with it, and compression spring 3 will be explained below.

Figure 22 b is the longitudinal sectional view along the center, has expressed the structure of the back leg 3 that has pedal frame 9.In the drawings, slider 7 is placed in the last block 14 contacted positions that are positioned at top dead centre, and pedal frame 9 places the following block 15 contacted positions with lower dead center.

Figure 23 is a floor map, has shown the preceding structure of the back leg 3 that pedal frame 9 is housed.At the front surface of back leg 3 along center position from the upper end of back leg 3 to the lower end, have an elongated guide hole 10.

In Figure 22 A, clamping block 17 on the slider 7 and the clamping block 19 on the pedal frame 9 extend into the inside of back leg 3 by elongated guide hole 10.Clamping block 17 on the slider 7 is fixed the upper end 12a of extension spring 12, and the clamping block 19 on the pedal frame 9 is fixed the lower end 12b of same extension spring.The two ends of this extension spring 12 are hooked on the groove 17a that is located on the clamping block 17 respectively and are located on the groove 19a on the clamping block 19.(shown in Figure 21 A)

With reference to above-mentioned structure, slider 7 and pedal frame 9 are connected together by extension spring 12.

The upper end of compression spring 13 is contained in locking bar 19b and goes up (seeing Figure 21 A), and stretch out the lower end of the clamping block 19 of locking bar 19b from the pedal frame 9.The lower end of compression spring 13 and the bottom 3c of back leg 3 join.For making compression spring 13 keep vertical at 3c place, the bottom of back leg 3, can establish a locking bar (not shown) at 3c place, the bottom of back leg 3 with the same quadrat method that the upper end of compression spring 13 is fixed on the locking bar, fixed thereon the lower end of compression spring 13.

Although in the superincumbent structure, extension spring 12 all is a coil spring with compression spring 13 usefulness, but other flexible member, also can be used as compression spring 13 as gas spring, under the situation of using gases spring, move around under the Compressed Gas effect of piston rod in gassiness piston/cylinder.

In said structure, extension spring 12 and compression spring 13 all are contained in the back leg 3.Yet spring 12,13 also can be contained in the outside of back leg 3.In this case, although it is not shown, clamping block 17 on the slider 7 and the clamping block 19 on the footrest frame 9 should be installed in the outside of back leg 3, extension also should be contained in the outside of the bottom of back leg 3, and extension spring 12 is contained between the clamping block 17 and the clamping block 19 on the pedal frame 9 on the slider, and compression spring 13 or gas spring can be contained between the extension of clamping block 19 on the pedal frame 9 and back leg.

Open a hole 3a (seeing Figure 22 D) in the side of back leg 3, shown in Figure 22 A, and be positioned at top dead centre when slider 7, and when contacting with last block 14, the inner terminal of the elongated hole 73 on the top board 7c of this hole 3a and slider 7 (seeing Figure 20 A) is on same the straight line.3a is corresponding with the hole, opens a spring cavity 44a in the inside of back leg 3, and pleated sheet spring 45a is contained in the spring cavity 44a.Shown in Figure 22 C, last lock pin 16a is contained on the sheet spring 45a, and when flexibly being supported by sheet spring 45a, last lock pin 16a can stretch out from the 3a of hole.

On the other hand, shown in Figure 21 D, open a hole 3b in the side of back leg 3, when pedal frame 9 is positioned at lower dead center and contacts with following block 15, the top of this hole and pedal frame 9 is on same the straight line, shown in Figure 21 A, with respect to spring cavity 44a, establish a spring cavity 44b in the inside of back leg 3 corresponding to hole 3b, and pleated sheet spring 45b is placed among the spring cavity 44b.Shown in Figure 22 C, on sheet spring 45b, be fixed with lock pin 16b.In addition, when lock pin 16b was pushed by sheet spring 45b elasticity, lock pin 16b just stretched out from the 3b of hole, shown in Figure 22 D.Adorn two swivel plates 20 and 21 on the extension on the slider 7 respectively, they are supported by bolster 78, shown in Figure 22 B.This swivel plate 20 and 21 rotates and gets back to original position respectively by the torsion spring (not shown).Circumferential slot 20b and 21b outside having respectively on swivel plate 20 and 21, oppositely around on the excircle of groove 20b and 21b, and with pin 23a, 23b is fixed on metallic cable 23a on swivel plate 20 and 21 peripheries and the front end of 23b metallic cable 23a and 23b.In addition, be respectively equipped with projection 20a and 21a on the swivel plate 20 and 21, shown in Figure 22 A.

Metallic cable 23a and 23b connect together with two operating knob 22a and 22b respectively by the endoporus on the depression bar 5, and button 22a and 22b are located at the top of depression bar 5.Shown in Figure 22 A.Omitted the internal structure of operating knob 22a and 22b among the figure.But, the end of metallic cable 23a and 23b can be locked in (not shown) on the excircle of pulley, these pulleys can be along with each operating knob 22a and being pushed of 22b and rotate, like this, metallic cable 23a and 23b can be pulled, when traction metallic cable 23a and 23b, swivel plate 20 or 21 both for a moment rotate around bolster 78.A rotation among swivel plate 20 and 21 projection 20a and the 21a is also pressed corresponding last lock pin 16a or lock pin down, is located under back leg 3 surfaces a bit.(illustrate with imaginary line among Figure 22 A) when slider 7 moves from the bottom up, wedge-shaped slot 74 parts on slider 7 top board 7c inner surfaces down press lock pin 16a, and lock pin 16a is reached be lower than back leg 3 surfaces a bit, shown in Figure 22 A.Thereby upward lock pin 16a just can not stop slider 7 to move up.

Now, the operating process that has the Foldable baby stroller of aforementioned structure according to present embodiment explanation.

Figure 24 has shown at the slider 7 of top dead centre and pedal frame 9.The slider of representing among this figure and the state of pedal frame are corresponding to the seat tool state of representing among Figure 11.Side lever 6 promotes foreleg 2 forward, so that leg opens.Simultaneously, along the pin 31 that is fixed in handrail element 4 rear ends, depression bar 5 recedes.Baby stroller just has been unfolded like this.

In the deployed condition of baby stroller, foreleg side lever 54 also is unfolded, as shown in figure 15, and similarly, as shown in figure 25, back leg side lever 55, the rear leg link 57 between slider connecting rod 56 and the left and right pin 58,58 also has been unfolded.

As shown in figure 24, in the deployed condition of baby stroller, last block 14 stops moving up of sliders 7, and goes up lock pin 16a and reach the outside and cooperate (seeing Figure 22 A) with elongated hole 73 on the slider 7.After last lock pin 16a entered into the inner terminal of elongated hole 73, slider just can not move down.

Although pedal frame 9 moves up by means of the elastic force of extension spring 12 and compression spring 13, when the following end in contact of itself and slider 7, be prevented from.

In Figure 24, when pedal frame 9 was positioned at top dead centre, the inner wall surface of pedal frame 9 was promptly depressed down lock pin 16b.Therefore, following lock pin 16b just no longer stops pedal frame to move down.If press down pedal frame 9 until contacting with following block 15 along back leg 3, as shown in figure 26, following lock pin 16b is promptly extend out to the outside of pedal frame 9 by the effect of the screen resilience of sheet spring 45b under compressive state.At this moment, moving up of pedal frame 9 promptly hindered and kept lock-out state.

At this state, compression spring 13 is pressed downward when contracting, and extension spring 12 is stretched downwards.At this moment, in extension spring 12 and compression spring 13, all stored elastic potential energy.Especially, extension spring 12 has tractive force and impels slider 7 to move down.And compression spring 13 has screen resilience and impels pedal frame to move up.Moving up of pedal frame 9 by lock pin 16b braking down.Simultaneously, slider 7 moves down by last lock pin 16a braking.Like this, pedal frame 9 and slider 7 promptly are placed in lock-out state.

In addition, under this state, slider 7 keeps static, thereby back leg side lever 55, slider connecting rod 56 and rear leg link 57 also keep deployed condition, as shown in figure 27.

When depressing one of operating knob 22a or 22b, when causing swivel plate 20 to rotate, the projection 20a extruding of swivel plate 20 is lock pin 16a down, and like this, slider 7 promptly is released from lock-out state.Meanwhile, the tractive force of extension spring 12 is released, and slider 7 promptly moves down along back leg 3.As shown in figure 28, move when contacting with the top of pedal frame 9 when the lower end of slider 7, slider 7 enters halted state.

Along with moving down of left and right slider 7,7, slider connecting rod 56 and rear leg link 57 be promptly around 58,58 rotations of left and right pin, and connecting rod 56 and 57 center hinge portion 56b and 57b remove mutually along the longitudinal direction of baby stroller as a result.When moving therewith, keep motionless slider 7 also to move down at another side, the result, back leg is promptly by laterally folded.Along with the folding movement of back leg, rear leg link 55 also is folded at its hinge portion 55b, and like this, the back leg 3 of baby stroller is just by laterally folded.

On the other hand, along with left and right slider 7,7 moves down, left and right foreleg 2,2 is folding to back leg 3,3 by side lever 6,6.Simultaneously, the front end of swinging block 51 rotates around its rotating shaft by connecting rod 52, as shown in figure 14.See that from the outside the second bevel gear 50b that is fixed in swinging block 51 turns clockwise.Along with the rotation of the left and right second bevel gear 5b, 50b, the left and right first bevel gear 50a, 50a are also by direction rotation as shown in figure 16.The left and right foreleg sleeve 43,43 that is fixed on the first bevel gear 50a, the 50a rotates backward in opposite direction, the result, the foreleg side lever 54 that two ends are fixed on the sleeve 43,43 is folded along left and right pin 54c, 54c, thereby causes left and right foreleg 2,2 by laterally folded.

In addition, along with moving down of left and right slider 7,7, left and right foreleg 2,2 is folding to back leg 3,3 respectively by side lever 6,6, as shown in figure 12.As a result, baby stroller is by longitudinal folding.

Like this, the left and right foreleg 2,2 of baby stroller, by laterally folded, simultaneously, baby stroller is also by longitudinal folding along with moving down of left and right slider 7,7 for left and right back leg 3,3.The whole framework of baby stroller is folded as shown in figure 12, and promptly the framework of baby stroller longitudinally and laterally all is folded.

When swivel plate 21 rotated owing to be depressed one of operating knob 22a or 22b, as shown in figure 28, the projection 21a of swivel plate 21 will depress lock pin 16b down, and like this, pedal frame 9 is promptly discharged from lock-out state.At this moment, the screen resilience of compression spring 13 also is released, and causes pedal frame 9 to move up.Simultaneously, pedal frame 9 upwards promotes slider 7, and the result causes slider 7 to get back to last block 14 contacted positions and keeps inactive state.At this moment, last lock pin 16a stops slider 7 to move down once more.

Along with moving up of pedal frame, slider 56 and rear leg link 57 are got back to their original deployed conditions, and back leg side lever 55 also is unfolded.Simultaneously, left and right side lever 6,6 pushes away foreleg 2,2 forward around hinge portion (pin 33) rotation of itself and foreleg 2,2.Simultaneously, left and right handrail element 4,4 and left and right depression bar 5,5 are finished and above-mentioned folding operation reverse operating.As a result, left and right foreleg 2,2 handrail elements 4,4 and depression bar 5,5 are got back to its deployed condition as shown in figure 11.

Simultaneously, left and right swinging block 51,51 rotates in the opposite direction by means of the left and right connecting rod 52,52 that is hinged on the left and right side lever 6,6.As a result, the left and right second bevel gear 50b, 50b get back to the direction rotation of its origin-location along them.Similarly, the left and right first bevel gear 50a, 50a rotation causes foreleg side lever 54,54 to get back to their original deployed conditions once more.

Like this, baby stroller vertically is unfolded simultaneously horizontal reaching as shown in figure 11.

In the superincumbent structure, under the situation that extension spring 12 is removed from back leg 3, even when pedal frame 9 has been moved downward to lower dead center, tractive force can not act on the slider 7 yet downwards, thereby framework can not be folded.But, if the baby stroller framework is designed under the manually folding situation, baby stroller has not just needed extension spring 12.

In said structure, if compression spring 13 is removed from back leg 3, even discharge from locking-in state after bottom dead center when pedal frame 9 is moved to it, also the screen resilience that can not make progress acts on the pedal 9 in addition.For this reason, slider 7 can not move up, and therefore its framework can not trailed yet.Yet if this framework is designed to manual expansion, baby stroller just no longer needs to compress spring 13.

With reference to Figure 30 to 41, the 3rd embodiment will be described in detail.

In order to make among the figure notion of the present invention more clear, seat and associated annex have all omitted.

As shown in figure 30, this Foldable baby handcart comprises foreleg 2, back leg 3, handrail 4, depression bar 5 and side lever 6.All these assemblies are left-right symmetry and distribute.Because the right and left all has these assemblies, the structure that is positioned at side member on one side will at first be described.

In Figure 31, a Connection Element 26 usefulness pivot pins 35 are fixed on the upper end of back leg 3, and pivot pin 35 rotatably is contained on the handrail 4.Connection Element 26 rotatably is hinged on the upper end of foreleg 2 by pivot pin 30, on foreleg 2 and the back leg 3 wheel 13 is housed all.

In this embodiment, foreleg 2 is made by pipe, and back leg 2 is made by the pipe of square-section.Back leg 3 arranges that by this way promptly the axis of pivot 25 is vertical with the broadside surfaces of back leg 3.The shape of pipe is not confined to this embodiment especially, and the element with other shape also is available.

The rear end of handrail 4 rotatably is hinged on the depression bar sleeve 25, and depression bar sleeve 25 is fixed on the depression bar 5 by pin 31.Depression bar 5 is made by pipe and analog.As shown in figure 33, depression bar extends from the rear end of left and right handrail 4,4, and the top of depression bar 5 takes the shape of the letter U substantially.The sweep of depression bar 5 links together by being positioned at the middle housing 24 in baby stroller top.One operating knob 22 is arranged on the housing 24, and this operating knob will be described in the back.Spacing by pin 35 on the adjustment handrail 4 and 31 can make depression bar 5 tilt to the back lower place with desirable angle.

Shown in Figure 35 A to 35D, a slider is installed around the periphery of left and right back leg 3,3, and left and right slider 7,7 identical structures will at first be described.Shown in perspective view 35A, slider 7,7 has two cuboid side plate 7a, 7a, they are with symmetrical manner layout parallel to each other, shown in Figure 35 B, biside plate 7a, 7a are connected together by base plate 7b parallel to each other and top board 7c, thereby form a cuboid hole 7i, back leg 3 is slidably by hole 7i.

If back leg 3 is not to be made by rectangular cross-sectioned tube, the cross section of hole 7i can be corresponding to the shape of the cross section of back leg 3 and is changed.

Shown in Figure 35 D, a through hole 32a is arranged at the top at the edge of close side plate 7a, and the pivot pin 32 that connects depression bar 5 and slider 7 is fixed by through hole 32a.(seeing Figure 35 A)

Shown in Figure 35 D, a jut 7d stretches out with the lower surface of base plate 7b.The pin 34 of one hinged side lever 6 one ends is fixed by the through hole 34a on the jut 7d.(seeing Figure 35 A)

Have the slider 7 that compresses spring 12 and also comprise following subsidiary component.The compression spring will be described subsequently.Shown in Figure 35 A, from the protruding pedal 27 of one of biside plate 7a, 7a, the user presses pedal 27 to cause slider 7 to be depressed with their pin.

One clamping block 17 is contained in the upper end (being the left end of base plate 7d among Figure 35 D) of base plate 7d shown in Figure 35 D, and a projection 17a stretches out (being the left end that pins element 17 Figure 35 D) from the lower end of clamping block 17.The upper end of compression spring 12 described later is fixed on the projection 17a.

One along top board 7c center longitudinally elongated slot 7e be used for holding lock pin 16 downwards by back legs 3, lock pin 16 will be explained below, shown in Figure 35 C.In the bottom surface of top board 7c one continuous cone tank 7f is arranged, it aligns with elongated slot 7e.

Shown in Figure 35 D, lock pin 16 along cone tank 7f by the time, lock pin 16 overcomes the elastic force of sheet spring 38 and is depressed, the sheet spring will be described later, so that it is more subsurface to reach back leg.One elongated cuts 7g is positioned at the center lengthwise position of top board 7c substantially, its align with elongated slot 7e (seeing Figure 35 C), certain any lock pin 16 is by behind the cone tank 7f down to keep being depressed into the surface, and when reaching elongated cuts 7g place, lock pin 16 protrudes upward by means of the elastic force of sheet spring 38.

Metallic cable locking element 37 roughly is positioned at the center of top board 7c upper surface, shown in Figure 35 D, the end of a through hole 37a with the overcoat of pinning metallic cable 23 is arranged on the metallic cable latch fitting 37, and metallic cable 23 will be described subsequently.(seeing Figure 35 B)

Two hole 7j, 7j lay respectively at the corresponding position of biside plate 7a, 7a, are used for fixing subsequently the bolster 20a of the swivel plate 20 that will be described.

Shown in Figure 35 A, the top of biside plate 7a, 7a is connected together by indicator board 29.Indicator board 29 is fixed on the outside that is positioned at biside plate 7a, 7a and has on two support section 7h, the 7h of two screw 29a, 29a.

Shown in Figure 35 B, comprising 3 li of back legs that compress spring 12, an elongated guide hole 19 is arranged in upper end from back leg 3 to the longitudinal centre line of lower end.When slider 7 moves in the mode of sliding in the periphery of back leg 3, when the projection of the clamping block 17 on the slider 7 base plate 7b kept level inwards simultaneously, clamping block 17 can move in the back leg the inside.

As shown in figure 30, last block 14 usefulness screws or pin 14a are fixed on a side on each left and right back leg 3,3 top.The top dead centre of slider 7 is exactly slider 7 and last block position contacting.As shown in figure 31.

Following block 15 usefulness screws or pin 15a are fixed on the neighboring of each left and right back leg 3,3 bottom, and the lower dead center of slider 7 is exactly slider 7 and following block position contacting as shown in figure 30, shown in figure 32.

As shown in figure 30, side lever 8a two ends are fixed on the two foreleg sleeves 28,28, and foreleg sleeve 28 is fixed on the bottom of left and right foreleg 2,2, so that the left and right side parts are coupled together (seeing Figure 33).Equally, a side lever 9 is connected left and right going up between the block 14,14 (seeing Figure 39), and a side lever 10 is connected between the left and right slider 7,7, these side lever 8,9,10 layouts parallel to each other, thus guaranteed the symmetry and the rigidity of left and right side member.

The fold mechanism of present embodiment will be described in detail, and when seeing baby stroller from back to front, concentrate on especially on a left side, the back leg 3,3 (being called back leg after this), the main strength of fold mechanism is provided by left back leg 3, operate so conveniently, certainly, right rear leg 3 also can provide main strength.

In Figure 36, slider 7 slidably assembles around the neighboring of back leg 3, and the clamping block 17 that is attached on the slider 7 reaches back leg 3 the insides along elongated guide hole 19.Clamping block 17 has a projection 17a who stretches out downwards, and on the other hand, the clamping block 18 that is attached to back leg 3 bottoms has a projection 18a who protrudes upward.Compression spring 12 is clamped between clamping block 17 and 18 in the mode that is installed on projection 17a and the 18a.

Although coil spring also is available as compression spring 12 as other flexible member of gas spring in said structure.In gas spring, a piston rod moves around under the pressure effect of Compressed Gas in the gassy piston/cylinder.

Compression spring 12 is contained in 3 li of back legs with top configuration mode, yet the compression spring also can place the outside of back leg 3.In this case, though do not illustrate in the drawings, the clamping block 17 on the slider 7 can reach the outside of back leg 3.Following clamping block 18 also can place the outside of back leg lower end, and compression spring 12 or gas spring can place between them.

Figure 38 shows the slider 7 that contacts with following block 15.In this state, lock pin 16 is aimed at the elongated cuts 7g of slider 7, thereby lock pin 16 reaches in the elongated cuts 7g from the back leg side.One spring cavity 39 is in back leg 3 the insides corresponding to elongated cuts 7g.Folding sheet spring 38 is located at 39 li of spring cavitys, and lock pin 16 is contained on the sheet spring 38, and this lock pin 16 stretches out hole 3a under the supporting of sheet spring 38 screen resiliences.

Correspondingly, when slider 7 is positioned at lower dead center and during with following block 15 contacts, as shown in figure 38, when lock pin 16 was aimed at the elongated cuts 7g of sliders 7, lock pin 16 reached the outside under sheet spring 38 supporting with resilience.As a result, lock pin 16 has pinned the inner of elongated cuts 7g, thereby slider 7 overcomes the restoring force of compression spring 12 and is locked in lower dead center.

Swivel plate 20 is supported by the bolster between slider 7 biside plate 7a, 7a.As shown in figure 38, swivel plate 20 is configured to by means of the rotation of torsion spring (not shown) and returns the home position.The end of metallic cable 23 links to each other with swivel plate 20, metallic cable 23 is connected on the operating knob 22 on depression bar top by the internal cavity of depression bar 5, the internal structure of operating knob 22 is omitted in the drawings, the end of metallic cable 23 is on the excircle of pulley or analog, along with operating knob 22 is depressed, pulley will rotate, so that the pulling metallic cable, because the action of metallic cable, swivel plate 20 will rotate around bolster 20a.The projection 21 of stretching out from the circumference of swivel plate 20 also can be rotated and be depressed lock pin 16, and then, lock pin 16 is forced into back leg 3 surfaces down a bit, and lock pin 16 is deviate from from the elongated cuts 7g of slider 7.

After lock pin 16 the deviating from from elongated cuts 7g, cause slider 7 to be compressed spring 12 restoring forces and upwards promote, and move up, when slider 7 contacts with last block, will stop to move towards last block 14.

According to present embodiment, the operation with Foldable baby handcart of said structure will be described below:

Figure 36 is the slider 7 that is positioned at top dead centre and 14 contacts of the same block.The state of sliding prop 7 is corresponding to the state of seat tool shown in Figure 31 in this figure.Side lever 6 promotes foreleg 2 forward, causes leg to open.Simultaneously, depression bar 5 recedes and fixes by being hinged to pivot pin 32 on the slider 7 and the pivot pin 31 that is hinged on handrail 4 rear ends, and like this, baby stroller is trailed.When baby stroller was in deployed condition, even compression spring 12 has the residue restoring force, last block 14 also can stop slider 7 to move upward.

Figure 37 is the partial rear view corresponding to 36, and this figure has shown the side lever 9 that connects left and right upward block 14,14 and connected left and right slider 7 to the relation of the position between the side lever 10 together.From then on see among the figure, and block 14,14 keeps in touch on the slider 7,7 same two.

As shown in figure 38, the user depresses the action of pedal 27, causes slider 7 to move to following block 15 along back leg 3 and contacts, and slider 7 is locked in lower dead center by lock pin 16.

With reference to Figure 35 D, as previously described, the inner surface of slider 7 top board 7c has cone tank 7f.Thereby from the process that top dead centre moves down, cone tank 7f depresses lock pin 16 makes it arrive back leg 3 surfaces down a bit at slider 7, thereby slider 7 can pass through lock pin.

The pressing action of pedal 27 causes slider 7 to move down, and the device 7,7 of horizontally slipping is simultaneously to moving down, as shown in figure 39, because slider connects together by side lever 10.

At this moment, as shown in figure 38, depression bar 5 and side lever 6 usefulness pivot pins 32 and 34 rotatably are hinged on the left and right slider 7,7.Because moving down of hinge portion (pivot pin 32) between slider 7 and the depression bar 5, hinge portion (pivot pin 31, the 32 and 35) rotation of depression bar 5 between slider 7, depression bar 5 and handrail 4 is so that erect, simultaneously, handrail 4 sharply tilts downwards.

Shown in figure 32, hinge portion between slider 7 and side lever 6 (pivot pin 34) is when moving down, the foreleg 2 that is hinged to side lever 6 other ends with pivot pin 33 is around the hinged place of foreleg 2 and back leg 3 (pivot pin 30) rotation, so that foreleg is folding towards back leg.By this way, baby stroller is just by longitudinal folding, shown in figure 32.

Then, the traction of metallic cable 23 causes the rotation of swivel plate 20, and as shown in figure 38, projection 21 is depressed lock pin 16, and depressing of lock pin 16 causes slider 7 to be thrown off from lock-out state, and be final, and the restoring force of compression spring 12 is released simultaneously.As shown in figure 36, slider 7 moves up along back leg 3, and stops at the top dead centre of block 4 contacts.

Along with moving up of slider 7, the point (pivot pin 32 and 34) that depression bar 5 and side lever 6 are hinged on the slider 7 also moves up.Opposite with aforesaid folding operation, depression bar 5 is downward-sloping, and handrail 4 turns back to level.In addition, foreleg is promoted towards the direction of launching, and whole baby stroller has just trailed as shown in Figure 31.

Figure 40 and 41 is variations of present embodiment, and these accompanying drawings are corresponding to Figure 36 and 38.In the above-described embodiments, compression spring 12 is clamped between the clamping block 18 of the clamping block 17 of slider 7 and back leg 3.One extension spring 12a is used for replacing compression spring 12, and the two ends of extension spring 12a are connected between the clamping block 14b on the clamping block 17b of slider 7 lower ends and back leg 3 tops.In this case, even all the other structures of baby stroller are identical with the 3rd embodiment, also can obtain this embodiment obtainable identical good effect:

Under the situation shown in Figure 40 and 41, the clamping block 14b that pins the back leg 3 of extension spring 12 upper ends is placed on 14 li of blocks, and clamping block 14b is designed to reach back leg 3 the insides by the elongated guide hole 19 of back leg 3.Extension spring 12a is connected between these clamping blocks 17b and the 14b.According to general knowledge, two hook ends of extension spring 12a are connected in the hole of clamping block 17b and 14b.

Owing to use such extension spring 12a, when slider 7 is positioned at top dead centre and contact with last block, extension spring 12a contraction, as shown in figure 40.As a result, baby stroller keeps stretching, as shown in figure 31.On the other hand, as shown in figure 41, because the pressing action of pedal 27, slider 7 moves down along back leg 3, up to it with till following block 15 contacts.Slider 7 is pinned by lock pin 16, and baby stroller is folded, shown in figure 32.Simultaneously, the pulling force that makes progress is stored among the extension spring 12a.Subsequently, when lock pin 16 was released, the pulling force of extension spring 12a was applied on the slider 7, and slider 7 moves up, and baby stroller turns back to extended configuration, as shown in figure 31.

In another variation of this embodiment, the extension spring 12a that is positioned at back leg 3 the insides among the embodiment is placed in the outside of back leg 3.In this case, though do not illustrate in the drawings, the clamping block 17b of slider 7 is designed to reach the outside, and clamping block 14b is placed in the outside of block 14.Extension spring 12a or gas spring are hooked between these clamping blocks 17b and the 14b.

With reference to Figure 42 to Figure 57, various details the 4th embodiment.

In order to make the notion of inventing among the figure more clear, seat and associated annex have all omitted.

As shown in figure 42, this Foldable baby handcart comprises foreleg 2, back leg 3, handrail 4, depression bar 5 and side lever 6, and all these assemblies are left-right symmetry and distribute.Because all there are these assemblies on left and right both sides, the structure that is positioned at side member on one side will at first be described.

In Figure 44, a Connection Element 26 usefulness pivot pins 35 are fixed on the upper end of back leg 3, and pivot pin 35 rotatably is contained on the handrail 4.Connection Element 26 is hinged on the upper end of foreleg 2 rotationally by pin 30.Wheel 13 all is housed on foreleg 2 and the back leg 3.

In the present embodiment, foreleg 2 is made by round tube, and back leg 3 is made by the pipe fitting of square-section.Back leg 3 arranges that by this way promptly the axis of pivot 35 is vertical with the broadside surfaces of back leg 3.The shape of pipe is not limited to this embodiment, and the element of other shape also is available.

Depression bar 5 is hinged to the rear end of handrail 4 by pivot pin 31.Depression bar 5 is made by pipe and analog.By adjusting the spacing of handrail 4 upper pins 31 and 35, depression bar 5 recedes with desirable angle.As shown in figure 43, a sleeve 5b links on the depression bar 5 with screw or pin 5h, and elongated guide hole 5c is arranged on the excircle of sleeve 5b.The screw or the stem knob 5d that are fixed on the folding bar 5a engage with elongated guide hole 5c.Folding rod 5a can rotate at the circumferencial direction of depression bar 5.

Shown in Fig. 4 b, the assembly of depression bar 5 and folding rod 5a is set at the both sides with respect to baby stroller framework longitudinal center, and left and right folding rod 5a, 5a are hinged to the both sides that are positioned at button box 24 respectively.Button box 24 usefulness pivot pin 60c are configured in the top of framework longitudinal center.Around depression bar 5,5 rotation left and right collapsible rod 5a, 5a separately, thereby make the framework that folds back become possibility, as shown in figure 43.

With reference to Figure 50 A and 50B, the fold mechanism of Connection Element 60 will be described, and a housing 61 is arranged on 24 li of button boxes, and each Connection Element 60 comprises inner member 60a and the outer member 60b that foldably is fitted together.Inner member 60a is connected on the housing 61, and outer member 60b is connected on the folding bar 5a, inner member 60a and outer member 60b with pivot pin 60c with big activation in the horizontal direction folding mode couple together.

One through hole 60d inleakage element 60a, outer member 60b also is provided with a jack 60e.Left and right bar 62a described later and 62b can insert in through hole 60d and the 60e simultaneously, and left and right bar inserts through hole 60d and 60e will cause the outer member 60b of inner member 60a to be lockable, and make folding inside and outside element become impossible.

When left and right bar 62a and 62b move on to the center of housing 61, the inner member 60a and the outer member 60b that are positioned at the button box both sides discharge from lock-out state, and two folding rod 5a, 5a become and freely fold with respect to the direction of button box 24 with the cardinal principle level.

One elongated hole 61a (being illustrated by the broken lines) roughly is positioned at the center of housing 61, as Figure 50 A and 50B.One operating knob 22 is configured in the bottom of housing 61.Operating knob 22 can vertically move by containing the downward restoring force of compression spring 22a within it.One lock pin element 63 stretches out up from operating knob 22.

A pair of guide runner 64a and 64b are configured in 61 li of housings respectively in this manner, and promptly they can be along the horizontal slip of passage up and down in the housing.Aforesaid bar 62a and 62b flatly link the outward flange of guide runner 64a and 64b respectively.Bar 62a and 62b internally the through hole 60d on the element 60a by and enter in the jack 60e of outer member 60b.

Stretch out an oblique elongated hole 65a from angle, stretch out an oblique elongated hole 65b from angle near the guide runner 64b of operating knob 22b longitudinal center near the guide runner 64a of operating knob 22a longitudinal center.One guide pin 69 is contained in the elongated hole 61a of housing 61, also is contained in 63 li of lock pin elements.

According to said structure, from Figure 50 B, can obviously see, if overcoming the restoring force of compression spring, operating knob 22 upwards presses, the guide pin 69 that is contained in 63 li of lock pin elements moves up along the elongated hole 61a of housing 61, and guide pin 69 is followed the oblique elongated hole 65a of left guide runner 64a, result simultaneously, guide runner 64a moves right along horizontal channel 61b, subsequently, guide pin 69 moves along the oblique elongated hole 65b of right guide runner 64b, causes the dextrad guide pad to move horizontally left.At last, left and right bar 62a and 62b inwardly move, and the front end of left and right bar 62a and 62b shifts out in the jack 60e of left outer member 60b.Like this, left side Connection Element 60 becomes collapsible.

Shown in Figure 50 A and 50B, the front end of metallic cable 23 is fixed on the metallic cable lock pin 23a, and this metallic cable lock pin 23 is locked to the end of right guide runner 64a.Correspondingly, if operating knob 22 is pressed up, right guide runner 64a moves right, and metallic cable 23 is pulled.

Metallic cable passes the inside of folding rod 5a and depression bar 5, and is guided so that can make swivel plate 20 rotations that are contained on the slider 7 by slider 7.When operating knob 22 was upwards pressed, left and right bar 62a and 62b moved inward, and like this, left and right folding rod 5a is resembled fold up shown in Figure 43.

Slider 7,7 is slidably installed around the periphery on left and right back leg 3,3 tops, shown in Figure 51 A to 51D.Left and right slider 7,7 identical structures will at first be described, and shown in perspective view 51A, slider has biside plate 7a, 7a, and they are with symmetrical manner layout parallel to each other.Shown in Figure 51 B, biside plate 7a, 7a are linked together by base plate 7b parallel to each other and top board 7c, thereby form a cuboid hole 7i, and back leg 3 is slidably by hole 7i.

If back leg 3 is not to be made by rectangular cross-sectioned tube, the cross section of hole 7i can be corresponding to the shape of back leg 3 cross sections and is changed.

Shown in Figure 51 D, the edge upper part of close side plate 7a has a through hole 32a, and the pivot pin 32 that connects depression bar 5 and slider 7 is fixed by through hole 32a.(seeing Figure 51 A)

Shown in Figure 51 D, a jut 7d stretches out from the lower surface of base plate 7b, and the pivot pin 34 of hinged side lever 6 one ends is fixed by the through hole 34a on the jut 7d.(seeing Figure 51 A)

The following describes the peculiar structure that has the slider 7 that compresses spring 12.The compression spring will be described subsequently.Except that the structure that the front has been mentioned, shown in Figure 51 A, from the protruding pedal 27 of one of biside plate 7a, 7a, the user presses pedal 27 to cause slider 7 to be depressed with their pin, one clamping block 17 is contained in the upper end (promptly using the left end of base plate 7d among the 51D) of base plate 7d, shown in Figure 51 D.One projection 17a stretches out (right-hand member that is clamping block 17 Figure 51 D) from the lower end of clamping block 17.The upper end of compression spring 12 described later is fixed on the projection 17a.

One elongated slot along top board 7c longitudinal center bottom (a left back leg part in Figure 51 C) is used for holding lock pin downwards by back leg 3.Lock pin 16 will be explained below, shown in Figure 51 C.In the bottom surface of top board 7c one continuous cone tank 7f is arranged, it aligns with elongated slot 7e.

Shown in Figure 51 D, lock pin 16 along cone tank 7f by the time, lock pin overcomes the elastic force of sheet spring 38 and depresses, the sheet spring will be described later, so that it is more subsurface to reach back leg in the represented mode of arrow 16a.One elongated cuts 7g roughly is positioned at the longitudinal center place of top board 7c, its align with elongated slot 7e (seeing Figure 51 C).Certain any lock pin 16 is by behind the cone tank 7f down to keep being depressed into the surface, and when coming elongated cuts 7g place, lock pin 16 protrudes upward by means of the elastic force of sheet spring 38.

Metallic cable latch fitting 37 roughly is positioned at the center of top board 7c upper surface shown in Figure 51 D, has a through hole 37a on the metallic cable latch fitting 37 to pin the outer casing end of metallic cable 23, and metallic cable 23 will be described (seeing Figure 51 B) subsequently.Two hole 7j, 7j lay respectively at the last corresponding position of biside plate 7a, 7a with symmetrical manner, are used for fixing subsequently the bolster 20a of the swivel plate 20 that will be described.

Shown in Figure 51, the top of biside plate 7a, 7a is connected together by indicator board 29.Indicator board 29 is fixed on the outside that is positioned at biside plate 7a and has on two support section 7h, the 7h of two screw 29a, 29a.

Shown in Figure 51 B, comprising 3 li of back legs that compress spring 12, when the periphery of slider 7 at back leg 3 moves in the mode of sliding, when the projection of the clamping block 17 on the slider 7 base plate 7b kept level inwards simultaneously, clamping block 17 can move in back leg 3 the insides.

As shown in figure 42, last block 14 usefulness screws or pin 14a are fixed on a side on each left and right back leg 3,3 top.The top dead centre of slider 7 is exactly slider 7 and last block 14 position contacting, as shown in figure 44.

Following block 15 usefulness screws or pin 15a are fixed on the neighboring of each left and right back leg 3,3 bottom, as shown in figure 42.The lower dead center of slider 7 be exactly slider 7 with following block 15 position contacting as shown in figure 45.

Shown in Fig. 4 b, two foreleg sleeves 43,43 are pivotally mounted to scheduled lower position on the left and right foreleg 2,2, and especially, a pin or screw 43b (seeing Figure 44) install to the scheduled lower position of foreleg 2.Elongated guide hole 43a is positioned at the circumferencial direction of foreleg sleeve 43, and the head of screw 43b places this.Foreleg sleeve 43 is rotatable at the length range of elongated guide hole 43a.

Left and right foreleg sleeve 43,43 usefulness foreleg side levers 54 connect together.Foreleg side lever 54 is made up of left and right side lever part 54a, 54a and the middle side lever part 54b that is clamped between them. Side lever part 54a, 54a and middle side lever part 54b are hinged together each other by two pin 54c, 54c.When left and right foreleg sleeve 43,43 rotated backward with opposite direction, side lever 54 folded back into U-shaped (seeing Figure 43) around left and right pin 54c, 54c.

Around the assembling of two foreleg sleeves, 43,43 excircles, one of two first bevel gear 50a, 50a will be given and being illustrated respectively for two first bevel gear 50a, 50a.Be contained in the outside of foreleg 2 with the second bevel gear 50b of first bevel gear engagement, so that can be around pin 51a rotation (seeing Figure 44), a swinging block 51 stretches out from the second bevel gear 50b.

As shown in figure 44, two ends are curved L shaped connecting rod 52 and are hooked on rotationally between the through hole 6b near somewhere on the through hole 51b of swinging block 51 front ends and the side lever 6.

As shown in figure 45, this structure is arranged, when left and right slider 7,7 during along vertically the moving down of back leg 3,3, slider 7 will be described in the back.Hinge portion between side lever 6 and the connecting rod 52 (through hole 6a place) moves down.Simultaneously, look from the side of baby stroller, swinging block 51 rotates (direction of arrow shown in Figure 44) in a clockwise direction by means of connecting rod 52.As a result, when the second bevel gear 50b on being fixed on swinging block 51 rotated, second bevel gear was by the interior rear rotation of first bevel gear to framework.As shown in figure 47, so that a left side, RAT sleeve 43,43 rotates backward jointly.The rotation backward of foreleg sleeve 43 causes foreleg side lever 54 to be folded into U-shaped at left and right pivot pin 54c, 54c place, thereby baby stroller is by laterally folded.

In addition, can see that left and right slider 7,7 is linked together by slider connecting rod 56 according to backsight Figure 48.This slider connecting rod 56 is made up of two V-arrangement folding rod 56a, 56a.Described folding rod 56a, 56a arrange their hinge portion up.Described folding rod 56a, the 56a longitudinal center place between two back legs 3,3 is hinged rotationally each other with pin 50b.The opposite end of folding rod 56a, the 56a that is hinged is connected respectively on the left and right slider 7,7, so that respectively to rotate around the such mode of pin 56c, promptly the center hinge portion by slider connecting rod 56 moves up at the longitudinal center place of baby stroller, make slider connecting rod 56 folding, as shown in figure 49.

Left and right back leg 3,3 is linked together by the rear leg link 57 that is positioned at two sliders, 7,7 tops, and as slider connecting rod 56, this rear leg link 57 also is made up of left and right V-arrangement folding rod 57a, 57a.Two folding rod 57a, 57a rotatably connect together with pin 57b.The opposite end of two connected folding rod 57a, 57a is hinged to left and right going up on the block 14,14 respectively, last block is contained on the left and right back leg 3,3 with pin 57c by this way, be rear leg link 57 with the plane of baby stroller vertical consistency in can fold, in order to fold rear leg link 57 in the direction opposite with slider connecting rod 56 folding directions, left and right collapsible rod 57a, 57a arrange their hinge portion down.

Slider connecting rod 56 and rear leg link 57 are linked together with two pins 58,58 by this way at two pin joints, promptly be separated from each other along with their center hinge contact and folding they.

According to this structure, when slider 7 (back will be described) when being positioned at top dead centre, baby stroller is horizontal spreading as shown in Figure 48 just.Therefore, slider connecting rod 56 and rear leg link 57 are trailed so that each other point-blank.On the other hand, when left and right slider 7,7 (back will be described) when being displaced downwardly to lower dead center, baby stroller is just laterally folded as shown in Figure 49.Separate the vertical of baby stroller with center hinge contact 56b and 57b by two pins 58,58, slider connecting rod 56 and rear leg link 57 are folded.

The fold mechanism of this embodiment will be described in detail, and concentrate on especially on the left back leg 3 of band pedal frame 9 (will describe subsequently).The main strength of fold mechanism is provided by left back leg 3, and this is for easy to operate consideration.Certainly, mainly strength also can be provided by right rear leg 3.

Among Figure 52, slider 7 slidably assembles around the neighboring of back leg 3, and the pinning element 17 that is contained on the slider 7 reaches back leg 3 the insides along elongated guide hole 19.Pin element 17 a projection 17a who stretches out is downwards arranged.On the other hand, the clamping block 18 that is attached to back leg 3 bottoms has a projection 18a who protrudes upward, and compression spring 12 is clipped between clamping block 17 and 18 in the mode that is installed on projection 17a and the 18a.

Although coil spring also can adopt as the flexible member of gas spring as compression spring 12 in said structure.In gas spring, a piston rod moves around under the pressure effect of Compressed Gas in gassiness piston/cylinder.

Compression spring 12 is contained in 3 li of back legs with top configuration mode, yet the compression spring also can place the outside of back leg 3.In this case, though do not have shown in the figure, the clamping block 17 of slider 7 also can reach the outside of back leg 3.Following clamping block 18 also can place the outside of back leg 3 lower ends.Compression spring 12 or gas spring can place between them.

Figure 54 shows the slider 7 that contacts with following block 15.In this state, lock pin 16 is aimed at the elongated cuts 7g of slider 7, thereby lock pin reaches in the elongated cuts 7g with the back leg side, and a spring cavity 39 is positioned at back leg 3 the insides corresponding to elongated cuts 7g, and folding sheet spring 38 is placed on 39 li of spring cavitys.Lock pin 16 is contained on the sheet spring 38, this lock pin 16 stretches out hole 3a under sheet spring 38 supporting with resilience side.

Correspondingly, when slider 7 is positioned at lower dead center and during with following block 15 contacts, shown in Figure 54, when lock pin 16 was aimed at the elongated cuts 7g of sliders 7, lock pin 16 reached the outside under sheet spring 38 supporting with resilience.As a result, lock pin 16 has pinned the inner of elongated cuts 7g, thereby slider 7 overcomes the restoring force of compression spring 12 and is locked in lower dead center.

Swivel plate 20 is supported by the bolster 20a between slider biside plate 7a, 7a.Shown in Figure 52 or 54.Swivel plate 20 is configured to by means of the rotation of torsion spring (not shown) and returns the home position.The end of metallic cable 23 links to each other with swivel plate, and metallic cable 23 is connected on the operating knob 22 on depression bar top by the internal cavity of depression bar 5.

The internal structure of operating knob 22 is omitted in the drawings, and the end of metallic cable 23 is around the excircle of pulley or analog, along with depressing of operating knob 22, pulley will rotate, so that metallic cable is stretched in traction, because the action of metallic cable 23, swivel plate 20 will rotate around bolster 20a.The projection 21 of stretching out from the circumference of swivel plate 20 also can be rotated and be depressed lock pin 16.Then, lock pin 16 is forced into back leg 3 surfaces down a bit, and lock pin 16 is deviate from from the elongated cuts 7g of slider 7.

Lock pin 16 deviating from from elongated cuts 7g causes slider 7 to be compressed upwards promoting and moving up towards last block 14 of spring 12 restoring forces.When slider 7 contacts with last block 14, will stop to move.

According to present embodiment, the operation with Foldable baby stroller of said structure will be described below:

Figure 52 is the slider 7 that is positioned at top dead centre and 14 contacts of the same block.The state of slider is corresponding to the state of seat tool shown in Figure 44 in this figure.Side lever 6 promotes foreleg 2 forward, causes leg to open.Simultaneously, depression bar 5 recedes and fixes by being hinged to pin 32 on the slider 7 and the pin 31 that is hinged on handrail 4 rear ends.Like this, baby stroller is trailed.When baby stroller was in deployed condition, even compression spring 12 has the residue restoring force, last block 14 also can stop slider 7 to move up.

Along with the expansion of baby stroller, foreleg side lever 54 is stretched out fully, as shown in figure 46.Slider connecting rod 56 and rear leg link 57 hinged left and right pins 58,58 are also trailed, shown in Figure 53.

Shown in Figure 54, the user depresses the action of pedal 27, causes slider 7 to move to following block 15 along back leg 3 and contacts, and slider 7 is locked in lower dead center by lock pin 16.

With reference to Figure 51 D, as previously described, the inner surface of slider 7 top board 7c has cone tank 7f, thereby, from the process that top dead centre moves down, cone tank 7f depresses lock pin 16 makes it arrive back leg 3 surfaces down a bit at slider 7, thereby slider 7 can pass through lock pin.

At this moment, shown in Figure 54, depression bar 5 and side lever 6 usefulness pins 32 and 34 rotatably are hinged on the left and right slider 7.Because the hinge portion (pin 32) between slider 7 and the depression bar 5 moves down, hinge portion ( pin 31,32, the 35) rotation of depression bar 5 between slider 7, depression bar 5 and handrail 4 is so that erect, and simultaneously, handrail 4 sharply tilts downwards.

As shown in figure 45, the hinge portion between slider 7 and side lever 6 (pin 34) is when moving down, and the foreleg 2 that is hinged to side lever 6 other ends with pin 33 rotates around the hinged place of foreleg 2 and back leg 3 (pin 30), so that foreleg 2 is folding towards back leg 3.By this way, baby stroller is just by longitudinal folding, shown in figure 32.

On the other hand, along with moving downward of left and right slider 7,7, by side lever 6, left and right foreleg 2 is folding towards two back legs 3.Simultaneously, the rotating shaft around swinging block rotates the leading end of swinging block 51 by means of connecting rod 52.As shown in figure 45.Being connected in the second bevel gear 50b on the swinging block 51 looks from the outside and is rotated in a clockwise direction.Along with the rotation of the left and right second bevel gear 50b, 50b, the left and right first bevel gear 50a, 50a rotate as shown in figure 47 like that.Be connected in the left side on two first bevel gear 50a, the 50a, right front sleeve 43,43 rotates backward with opposite direction.The foreleg side lever 54 that two ends are fixed on the sleeve 43 is folding around left and right pin 54c, 54c, so that left and right foreleg 2,2 is by laterally folded.

Combine with the jackknife action of baby stroller, the slider connecting rod 56 that two ends are hinged on the slider 7 is folded up along pivot pin 51a and 57a around the left and right pin of the pin joint one of its rear leg link 57 58,58.When slider 7 moves down shown in Figure 55, cause left and right back leg 3,3 by laterally folded.

By this way, the whole framework of baby stroller has just been folded up as shown in figure 43 like that, and promptly framework is not only vertically but also laterally be folded.

Then, the traction of metallic cable causes the rotation of swivel plate 20, and shown in Figure 54, projection 21 is depressed lock pin 16, and depressing of lock pin 16 causes slider 7 to be thrown off from lock-out state.Finally, the restoring force of compression spring 12 is released simultaneously.Shown in Figure 52, slider 7 moves up along back leg 3, and stops at the top dead centre that contacts with last block 4.

Simultaneously, along with moving up of slider 7, by means of connecting rod 52, the first and second bevel gear 50a, 50b rotates together with opposite direction, thereby causes foreleg side lever 54 again by strong expansion.Corresponding to the action of stretching out of foreleg side lever 54, back leg side lever 55 is also stretched out, and simultaneously, slider connecting rod 56 and rear leg link 57 are trailed again.As a result, the whole framework of baby stroller is in horizontal and vertical expansion, as shown in figure 42.

Figure 56 and 57 is variations of this embodiment, and these are corresponding to Figure 52 and 54.In the above-described embodiments, compression spring 12 is clipped between the clamping block 18 of the clamping block 17 of slider 7 and back leg 3.One extension spring 12a is used for replacing compression spring 12, and the two ends of extension spring 12a are connected between the clamping block 14 on the clamping block 17b of slider 7 lower ends and back leg 3 tops.In this case, even all the other structures of baby stroller are identical with the 4th embodiment, also can obtain by this embodiment obtainable identical good effect.

Under the situation shown in Figure 56 and 57, the clamping block 14b that pins the back leg 3 of extension spring 12 upper ends is located in the block, and clamping block 14b is designed to reach back leg 3 the insides by the elongated guide hole 19 of back leg 3.Extension spring 12a is connected between these clamping blocks 17b and the 14b.According to universal experience, two hook ends of extension spring 12a are connected in the hole of clamping block 17b and 14b.

Owing to use such extension spring 12a, when slider 7 was positioned at top dead centre and contact with last block, extension spring 12a contraction was shown in Figure 56.As a result, baby stroller keeps stretching, as shown in figure 44.On the other hand, shown in Figure 57, because the pressing action of pedal 27, slider 7 moves down along back leg 3, up to it with till following block 15 contacts.Slider 7 is pinned by lock pin 16, and baby stroller is folded, as shown in figure 45.Simultaneously, the pulling force that makes progress is stored among the extension spring 12a.

Subsequently, when lock pin 16 was released, the pulling force of extension spring 12a was applied on the slider 7, and slider 7 moves up, and baby stroller turns back to extended configuration, as shown in figure 44.

In another variation of this embodiment, the extension spring 12a that is positioned at back leg 3 the insides among the embodiment is placed in the outside of back leg 3.In this case, though do not illustrate in the drawings, the clamping block 17b of slider 7 is designed to reach the outside, and clamping block 14b is placed in the outside of block 14.Extension spring 12a or gas spring are hooked between these clamping blocks 17b and the 14b.

With reference to Figure 58 to Figure 63, below the 5th embodiment will be described.

In order to make notion of the present invention shown in the figure more clear, seat and associated annex have all omitted.

Shown in Figure 58, this Foldable baby handcart comprises foreleg 2, back leg 3, handrail 4, depression bar 5 and side lever 6.All these assemblies are left and right symmetrical distribution.Because all there are these assemblies on left and right both sides, the structure that is positioned at side member on one side will at first be described.

In Figure 59, a Connection Element 26 usefulness pivot pins 35 are fixed on the upper end of back leg 3, and pivot pin 35 rotatably is contained on the handrail 4.Connection Element 26 rotatably is hinged on the upper end of foreleg 2 by pivot pin 30.On foreleg 2 and the back leg 3 wheel 37 is housed all.

In this embodiment, foreleg 2 is made by round tube, and back leg 3 is made by the pipe fitting of rectangular cross section.It is essential that back leg is made hollow, so that screw rod 9 (will describe subsequently) can insert 3 li of back legs.It is that oval pipe is made that back leg 3 should preferentially be selected cross section for use.

The rear end of handrail 4 rotatably is hinged on the depression bar sleeve 25, and depression bar sleeve 25 is fixed on the depression bar 5 by pin 31.Depression bar 5 is made by pipe and analog.Shown in Figure 58, press cash 5 to extend from the rear end of left and right handrail 4,4, the top of depression bar 5 roughly takes the shape of the letter U.The curved portion of depression bar 5 links together by being positioned at the middle housing 24 in baby stroller top.One operating knob 22 is arranged on the housing 24, and this operating knob will be described in the back.Spacing by pin 35 on the adjustment handrail 4 and 31 can make depression bar 5 tilt to the back lower place with desirable angle.

Shown in Figure 58, the two ends of side lever 10 are fixed on the foreleg sleeve 28,28, and the foreleg sleeve is fixed on the bottom of left and right foreleg 2,2, so that the left and right side parts are connected together.Equally, a side lever 11 is linked on block housing parts 26b and one between the block 21, and the block housing parts is fixed on the top of back leg 3, and it will be described in the back, and last block 21 usefulness pins 21 are fixed on the top of another back leg 3.In addition, a side lever 12 connects together left and right slider 7,7.These side lever 10,11,12 layouts parallel to each other, thereby, the symmetry and the rigidity of left and right sides member guaranteed.

Two sliders 7,7 are slidably installed around the periphery of left and right back leg 3,3.

Slider 7 has a tubular portion 7a, and its interior shape has the cross section of an approximate ellipsoidal corresponding to the outer shape of back leg 3, shown in Figure 63 A and 63B.A pair of jut 7b, 7b parallel to each other is located at the two sides of tubular portion 7a along the longitudinal axis of slider 7.On two jut 7b, 7b, two through hole 32a, 32a are arranged.By inserting pin in each through hole 32a and depression bar 5 is hinged on the slider 7.

A support 7c is fixed on relative vertical side, side of stretching out with jut 7b.One pin 34 is inserted among the through hole 34a that props up on the support 7c and is used for an end of side lever 6 is hinged on the slider 7.

Above structure is to being contained in the left and right slider the 7, the 7th on the left and right back leg 3,3, and is identical.One back leg 3 (will describe subsequently) of band screw 9 is called as back leg 3 after this.The slider 7 that is contained on these back leg 3 peripheries has one below with the additional structure of describing.

Shown in Figure 63 c, a maintainance block 7d installs along the longitudinal center in the support 7c of slider 7, so that in the face of tubular portion 7a.One guide pad 7e installs on this assurance piece 7d in the mode that can reach in the tubular portion 7a.In addition, a sliding members 8 is fixed on the guide end of guide pad 7e.

Guide pad 7e is connected on the slider that is contained in back leg 3 outsides with the sliding members 8 that is positioned at 7 li of sliders.The vertical passage of one vertical elongated guide hole 16 as guide pad 7e arranged on the back leg 3.(Figure 62 A or 62B)

Shown in Figure 63 C, sliding members 8 is positioned in the tubular portion 7A of slider 7 (seeing Figure 62 A or 62B).The inner surface of sliding members 8 has an internal thread 8a, and screw rod 9 is at vertical screw-in sliding members 8 of back leg 3.

Screw rod 9 vertically is configured in 3 li of back legs, and shown in Figure 62 A or 62B, it is rotatably mounted that its upper and lower side is positioned at the bearing 14 of 3 li of same back legs, and the upper end of screw rod 9 is directly connected on the rotating shaft 13a of motor 13 with joint sleeve 15.

As previously mentioned, Connection Element 26 (Figure 59) is installed into the upper end of back leg 3, and the space 26a of a placement motor is arranged at the bottom of this Connection Element 26.Motor 13 is screwed at space 26a place, and motor 13 is equipped with a reducing gear 13b.The torque of motor 13 is delivered to rotating shaft 13b after converting suitable rotary speed to.One battery or dry cell are used as the power source of motor 13.For this reason, a dry cell box 20 is connected in the side of depression bar 5, and a lead (not shown) plug is used for being connected to motor 13 for 5 li to depression bar.

Switch 23 is contained on the housing 24 that is configured in depression bar 5 tops.The lead (not shown) of linking on the switch 23 is also filled in depression bar 5 the insides.Switch 23 should preferentially be designed to allow motor 13 to rotate at both direction.

Because said structure is arranged, when the driving of motor 13 caused screw rod 9 rotations, the internal thread 8a that sliding members is 8 li is and then rotation also.As a result, the guide pad 7e of slider 7 straight line under elongated guide hole 16 guiding of back leg 3 moves, and slider 7 moves at the longitudinal direction of back leg 3, because the conversion of switch 23 action.Slider 7 can the longitudinal direction of back leg 3 on or move down.

One block shell 26b is contained in the bottom of Connection Element 26 with pin 36,36.Shown in Figure 62 A or 62B.Stop assembly 17 is configured in this block shell 26b on one, to stop moving up of slider 7.One limit switch 17 is used in the stop assembly, shown in Figure 63 A or 63B.One is installed in the limit switch 17 toward multiblock 19, to guarantee its action.

Two spaced apart, point-blank elongated hole 19a, 19a are each other arranged on the multiblock 19, shown in Figure 63 B, on multiblock 19, an outstanding conical surface 19b who aligns with two elongated hole 19a, 19a is arranged, stretch out a projection 19d from side toward multiblock 19.One dog hole 19c is arranged in this projection 19d.Two pins 27,27 that separate each other at the moving direction of slider 7 are fixed on block shell 26b the inside, shown in Figure 63 A.Two pins 27,27 are contained in respectively in two elongated hole 19A, the 19A of multiblock 19.When toward multiblock 19 when slider 7 moves, stretch out block shell 26b toward the lower end of multiblock 19, and pin 28a is fixed on the slider 7 at block shell 26b, extension spring 28 is connected to pin 28a and toward between the dog hole 19c of multiblock 19.

By means of such structure, guide by two pins 27,27 toward multiblock 19.When the pulling force of extension spring 28 is applied on multiblock 19, reach outside the block shell 26b toward the lower end of multiblock 19.As a result, slider moves up, and the 7f end (Figure 63 A) of slider 7 is upwards pressed toward multiblock 19.Then, the pulling force that overcomes extension spring 28 toward multiblock 19 moves up.When slider moved down again, past multiblock 19 was owing to the pulling force that is subjected to extension spring 28 is protruding towards slider 7 again.

Limit switch 17 is linked in the power circuit of motor 13, so that send the signal that begins or stop to motor 13.For this reason, a switch element 17a is configured in certain position, in this position, when the go together outstanding conical surface 19b contact of multiblock 19 or when throwing off, switch element 17a just is closed or disconnects of switch element 17a.

When slider 7 moved up, shown in Figure 63 A, the switch element 17a of limit switch was from throwing off toward the outstanding conical surface 17a of multiblock 19.As a result, be subjected to thrust toward multiblock 19, so that stretch out in shell its lower end, power circuit is disconnected, and motor 13 is disconnected successively.This position is the top dead centre of slider 7.In addition, shown in Figure 63 B, when slider 7 moved down, the switch element 17a of limit switch 17 contacted with the outstanding conical surface 17 of past multiblock 19, is pushed in the shell toward multiblock.This pushing action causes power circuit to be switched on, and motor 13 begins rotation.

Another limit switch 18 is installed in the bottom of back leg 3, shown in Figure 62 A or 62B.When sliding members 8 moved down owing to the rotation of screw rod 9, the tapered edges 8b that is positioned at sliding members 8 inferior horn ends contacted with the switch element 18a of limit switch 18, and limit switch 18 is opened or shuts.Limit switch 18 is also received in the power circuit of motor 13, it be designed to send beginning or the signal that stops to motor 13.When sliding members 8 contacted with the switch element 18a of limit switch 18 with tapering point 18b, power circuit was disconnected, and slider 7 stops to move down, and this position is the lower dead center of slider.

According to this embodiment, the operation with Foldable baby stroller of said structure will be described below.

Figure 62 A shows the slider 7 that is parked in top dead centre after the longitudinal direction of back leg 3 moves up.At this moment, the following end in contact of the 7f of slider 7 end and past multiblock 19, and promote gradually toward multiblock 19 upwards.Thereby limit switch 17 is disconnected, and motor 13 stops the rotation.

The slider state that shows at this figure is corresponding to the seat tool that launches shown in Figure 59.Side lever 6 promotes foreleg 2 forward, so that leg opens.Simultaneously, depression bar 5 recedes, and the pin 31 that is hinged to the pin 32 on the slider 7 and is hinged to handrail 4 rear ends supporting, and baby stroller is unfolded.

When motor was activated, screw rod 6 began rotation, shown in Figure 62 B, and the result, sliding members 8 moves down, and slider 7 also moves down at the longitudinal direction of back leg 3.When slider 7 arrived lower dead center, limit switch 18 was disconnected, and motor 13 stops the rotation.

At this moment, shown in Figure 62, left and right slider 7,7 usefulness depression bars 5 are fixed together, thereby when slider 7 moved down, another slider 7 also moved down at the longitudinal direction of back leg 3.Move downward therewith and interrelate, depression bar 5, handrail 4 and side lever 6 rotate around hinge portion ( pin 31,32 and 35).Depression bar 5 erects, and handrail 4 is sharply downward-sloping.

In addition, shown in Figure 60, the hinge portion between slider 7 and side lever 6 (pin 34) moves down, and the foreleg 2 that is hinged to side lever 6 other ends with pin 33 rotates around the pin joint (pin 30) of foreleg 2 and back leg 3, so that foreleg 2 is folding towards back leg 3.By this way, baby stroller is by longitudinal folding.

When motor 13 reverse rotations, the direction rotation that the screw rod direction of rotation when screw rod 9 moves down to cause slider 7 is opposite.Along with sliding members 8 moves up, slider 7 also moves up.When slider 7 reaches top dead centre shown in Figure 62 A, toward multiblock 19 with the 7f end in contact of aforesaid the same manner with slider 7.As a result, be pushed upwardly toward multiblock 19, limit switch 17 is disconnected, and motor 13 is disconnected successively.

Interrelate with moving up of slider 7, slider 7 also moves up with the hinge portion (pin 32 and 34) of depression bar 5 and side lever 6.In the mode opposite with the aforementioned operation mode, depression bar 5 recedes, and handrail 4 turns back to level.In addition, foreleg is subjected to thrust forward, and leg is opened as a result.By this way, the whole framework of baby stroller is trailed shown in Figure 59 like that.

In the above-described embodiments, motor 13, screw rod 9, sliding members 9 and stop assembly 17,18 only are installed in the back leg 3.Yet present embodiment is not limited to such example.Certainly, mobile slider 7 power source up and down also can be provided by two back legs 3,3 respectively.

To accompanying drawing 74, will describe the sixth embodiment of the present invention in detail with reference to accompanying drawing 64 below.

In order to make notion of the present invention shown in the figure more clear, seat and associated annex have all omitted.

Shown in Figure 64, this Foldable baby handcart comprises foreleg 2, back leg 3, handrail 4, depression bar 5 and side lever 6.All these parts all are and are symmetrical set.Because the right and left all has these parts, the structure that is positioned at side member on one side will at first be described.

In Figure 66, a Connection Element 26 usefulness pivot pins 35 are fixed on the upper end of back leg, and pivot pin 35 is contained on the handrail 4 rotationally.Connection Element 26 is hinged on the upper end of foreleg 2 rotationally by pivot pin 30, on foreleg 2 and the back leg 3 wheel 37 is housed all.

In the present embodiment, foreleg 2 can be made by round tube.Back leg 3 must be made hollow, so that the screw rod 9 that the back will be described can insert in this back leg 3, for example, back leg 3 is preferably made by the pipe with oval cross section.

The rear end of handrail 4 is hinged on the depression bar sleeve 25 rotationally, and the depression bar sleeve is fixed on the depression bar 5 by pin 31.This depression bar 5 is made by round tube or analog.Shown in Figure 68, depression bar 5 extends from the rear end of left and right handrail element 4,4, and its top roughly curves the U-shaped shape.The sweep of depression bar 5 links together by the box 24 of the center upper portion of baby stroller.Box 24 is provided with the switch 23 that will be described later.By pivot pin 35 on the adjustment handrail element 4 and the spacing between the pivot 31, depression bar 5 is tilted to the back lower place with desirable angle.

One sleeve 5b is positioned at the upper end of depression bar 5, thus folding rod 5a and depression bar 5 is linked together.The sleeve 5b that is positioned at depression bar 5 upper ends has elongated pilot hole 5c at its outer surface.Screw that stretches out from folding rod 5a or the head of pin 5d are meshed with the elongated guide hole, so folding rod 5a can rotate at the circumferencial direction of depression bar 5.

Shown in Figure 68, the assembly of depression bar 5 and folding rod 5a is set at the both sides with respect to baby stroller framework longitudinal center.Left and right folding rod 5a, 5a are hinged to respectively on the Connection Element 60,60 at button box 24 two ends, and button box 24 usefulness pivot pin 60c are arranged on the top of framework longitudinal center.As a result, depression bar 5,5 rotation folding rod 5a, 5a around separately make the framework that folds back become possibility, shown in Figure 65.

Describe as follows with reference to Figure 72 A and 72B to the foldable structure of Connection Element 60.One housing 61 is arranged in the button box 24.Each of Connection Element 60,60 comprises inside 60a and the outer member 60b that foldably is fitted together.Inner member 60b is connected on the housing 61, and outer member 60b is also connected on the folding depression bar 5a.Inner member 60a and outer member 60b couple together in the mode that can fold on the direction of approximate horizontal with pivot pin 60c.

One through hole 60d inleakage element 60a, and be shaped on a patchhole 60e on the outer member 60b.Left and right bar 62a that will be explained below and 62b can insert among through hole 60d and the 60e simultaneously.Left and right bar 62a and 62b insert through hole 60d and 60e will cause inner member 60a and outer member 60b to be lockable, and it is impossible that folded interior and outer member are become.

When left and right bar 62a and 62b are moved to the center of housing 61, the inner member 60a and the outer member 60b that are positioned at the button box both sides are discharged from lock-out state, and folding rod 5a, 5a can freely be folded with respect to the direction of button box 24 with approximate horizontal.

One elongated hole 61a (being illustrated by the broken lines) roughly is positioned at the center of housing 61, as Figure 72 A and 72B.One action button 22 is arranged on the bottom of housing 61, and it can vertically move by the downward screen resilience that is contained in housing 61 internal compression spring 22a.One lock pin element 63 stretches out up from operation ammonium button 22.

A pair of guide runner 64a and 64b are configured in respectively in the housing 61 by this way, and promptly they can be along the upper and lower groove horizontal slip in the housing 61.Aforesaid bar 62a flatly is connected with the outward flange of guide runner 64a and 64b respectively with 62b.Bar 62a and 62b pass the through hole 60d on the inner member 60a and enter among the jack 60e on the outer member 60b.

Stretch out an oblique elongated hole 65a from angle, stretch out an oblique elongated hole 65b from angle near the guide runner 64b of action button 22b longitudinal center near the guide runner 64a of action button 22a longitudinal center.One guide pin 69 is contained among the elongated hole 61a of housing 61, also matches with lock pin element 63 simultaneously.

According to said structure, from Figure 72 B, can see significantly, if overcoming the screen resilience of compression spring 22a, action button 22 upwards presses, the guide pin 69 that is contained in the lock pin element 63 moves up along the elongated hole 61a of housing 61, the oblique elongated hole 65a of left side guide runner 64a also moves with guide pin, and result left side guide runner 64a along continuous straight runs moves right.Simultaneously, guide pin 69 is along with the oblique elongated hole 65b on the right guide runner 64b moves, and the result is moved to the left right guide runner 64b along continuous straight runs.At last, left and right bar 62a, 62b move inwards, and the front end of left and right bar 62a, 62b shifts out in the jack 60e of left outer member 60b.Like this, left Connection Element 60 becomes collapsible.

Shown in Figure 72 A and 72B, be arranged in the box 24 on housing 61 tops and also be provided with a switch 23.The lead (not shown) that links to each other with switch stretches in folding rod 5a and the depression bar 5, and the lead that joins with motor 13 will be explained below.Motor 13 can be controlled in the both direction rotation.

Shown in Figure 68, foreleg sleeve 43,43 is pivotally mounted to the scheduled lower position of left and right foreleg 2,2.Especially, a pin or screw 43b (seeing Figure 66) install to lower position predetermined on the foreleg 2.Elongated guide hole 43a is positioned at the circumferencial direction of foreleg sleeve 43, and the head of screw 43b is placed in one.Foreleg sleeve 43 is rotatable in the length range of elongated guide hole 43a.

Left and right foreleg sleeve 43,43 usefulness foreleg side levers 54 link together.Foreleg side lever 54 is made up of left and right side lever part 54a, 54a and the middle side lever part 54b that is clipped between them. Side lever part 54a, 54a and middle side lever part 54b are hinged together each other by two pin 54c, 54c.When left and right foreleg sleeve 43,43 rotated backward with opposite direction, side lever 54 folded back into U-shaped (seeing Figure 65) around left and right pin 54c, 54c.

The first bevel gear 50a, 50a assemble around the excircle direction of two foreleg sleeves 43,43 respectively.One of the first bevel gear 50a, 50a are described now.Be contained in the outside of foreleg 2 with the second bevel gear 50b of first bevel gear engagement, so that can rotate (seeing Figure 66) around pin 51a.One swinging block 51 stretches out from the second bevel gear 50b.Shown in Figure 66, a connecting rod 52 is hung in rotationally near between the through hole 51b and the through hole 6b on the side lever 6 of swinging block 51 front ends.

Figure 67 shows a kind of like this structure, and when left and right slider 7,7 during along vertically the moving down of back leg 3,3, the hinge portion between side lever 6 and the connecting rod 52 (through hole 6a place) will move down, and slider 7 will be described in the back.Simultaneously, look from the side of baby stroller, swinging block 51 rotates (direction of arrow shown in Figure 66) in a clockwise direction by means of connecting rod 52.As a result, shown in Figure 69, during the second bevel gear 50b on being fixed on swinging block 51 rotation, the first bevel gear 50a is to the interior rear rotation of framework, so that left and right sleeve 43,43 rotates backward jointly with opposite directions.The result that foreleg sleeve 43 rotates backward causes foreleg side lever 54 to be folded into U-shaped at left and right pivot pin 54c, 54c place, thereby makes baby stroller by laterally folded.

In addition, can see that left and right slider 7,7 is connected together by slider connecting rod 56 with rearview 70.This slider connecting rod 56 is made up of two U-shaped folding rod 56a, 56a.The hinge portion of folding rod 56a, 56a is provided with up, and the longitudinal center place of pivot pin 56b (accompanying drawing 71) between two back legs 3,3 is hinged rotationally each other with folding rod 56a, 56a.The opposite end of folding rod 56a, the 56a that is hinged is connected respectively on the left and right slider 7,7, so that respectively to rotate around the such mode of pin 56c, promptly when wherein hinge portion moved up at the longitudinal center place of baby stroller, slider connecting rod 56 was collapsible, shown in Figure 71.

Left and right back leg 3,3 is linked together by the rear leg link 57 that is positioned at two sliders, 7,7 tops, and as slider connecting rod 56, this rear leg link 57 also is made of left and right U-shaped folding rod 57a, 57a.Two folding rod 57a, 57a are pivotally connected to together by pin 57b, connecting rod 57 is hinged on and stops between housing 26b and the overhead gage 21, stop that housing 26b is fixed on the back leg 3 and will be described hereinafter, last block 21 (shown in Figure 64) is fixed on another back leg 3 by pin 21a, its mode makes that rear leg link 57 can fold when rear leg link 57 is in the plane of baby stroller vertical consistency.In order to fold rear leg link 57 in the direction opposite with slider connecting rod 56 folding directions, left and right collapsible rod 57a, 57a all arrange their hinge portion down.

Slider connecting rod 56 and rear leg link 57 are linked together with pin 58,58 by this way at two pin joints, promptly be separated from each other along with their center hinge contact and folding they.

According to this structure, when slider 7 was positioned at top dead centre, baby stroller is horizontal spreading as shown in Figure 70 just, and slider 7 will be described later.Therefore, slider connecting rod 56 and rear leg link 57 are trailed so that drive on straight line each other.On the other hand, when left and right slider 7,7 (back will be described) when being displaced downwardly to bottom dead center position, baby stroller is just laterally folded like that shown in Figure 71.In vertically the separating of baby stroller, slider connecting rod 56 and rear leg link 57 have been folded by two pins 58,58 and center hinge contact 56b and 57b.

Slider 7,7 is slidably installed round the periphery of left and right back leg 3,3.

Slider 7 has a tubular portion 7a, and its interior shape has the cross section of approximate ellipsoidal corresponding to the outer shape of back leg 3, shown in Figure 74 A to 74C.A pair of bossing 7b, 7b parallel to each other is attached to the two sides of tubular portion 7a along the longitudinal axis of slider 7.On two jut 7b, 7b, two through hole 32a, 32a are arranged.By inserting pin to each through hole 32a, 32a and depression bar 5 is hinged on the slider 7,7.

Support 7C is fixed on the relative vertical side surface in the side of stretching out with jut 7b, 7b.One pin 34 is inserted among the through hole 34a that props up on the support 7C and is used for an end of side lever 6 is hinged on the slider 7.

Above structure is to being contained in the left and right slider the 7, the 7th on the left and right back leg 3,3, and is identical.A back leg 3 (will describe subsequently) of band screw rod 9 is called as back leg 3 after this.The slider 7 that is contained on these back leg 3 peripheries has the additional structure that will illustrate below.Shown in Figure 74 C, a maintainance block 7d installs along the longitudinal center in the support 7C of slider 7, so that in the face of tubular portion 7a.One guide pad 7e installs on this maintainance block 7d in the mode that can reach in the tubular portion 7a.In addition, a sliding members 8 is fixed on the guide end of guide pad 7e.

Guide pad 7e is connected on the slider that is contained in back leg 3 outsides with the sliding members 8 that is positioned at 7 li of sliders.The longitudinal guide (as Figure 73 A or 73B shown in) of one vertical elongated guide hole 16 as guide pad 7e arranged on the back leg 3.

Shown in Figure 74 C, sliding members 8 is positioned in the tubular portion 7a of slider 7 (seeing Figure 73 A or 73B).The inner surface of sliding members 8 is shaped on internal thread 8a, and external threaded 9 is along in vertical screw-in sliding members 8 of back leg 3.

Screw rod 9 longitudinally is arranged on 3 li of back legs, and shown in Figure 73 A or 73B, its upper and lower end is rotatably mounted by the bearing that is provided with on the same back leg 3 14,14.The upper end of screw rod 9 is directly connected on the rotating shaft 13a of motor 13 by sleeve 15.

As previously mentioned, Connection Element 26 (shown in Figure 65) is installed into the upper end of back leg 3, and the bottom of this Connection Element 26 is provided with the space 26a of a placement motor.Motor 13 is screwed at space 26a place.Reducing gear 13b is housed on the motor 13, and the torque of motor 13 is delivered to rotating shaft 13b after being converted into suitable rotating speed.Battery or dry cell can be used as the power source of motor 13.For this reason, a battery case 20 is fixed on the side of depression bar 5, and a lead (not shown) plug is used for connecting motor 13 for 5 li at depression bar.

Switch 23 is contained on the box 24 that is arranged on depression bar 5 tops.Link lead plug on the switch 23 in depression bar 5 the insides.Switch 23 should preferentially be designed to allow motor 13 to rotate at both direction.

Because said structure, when the driving of motor 13 caused screw rod 9 rotations, the internal thread 8a that sliding members is 8 li also and then rotated.As a result, the guide pad 7e of slider 7 moves at the elongated guide hole 16 guiding lower edge of back leg 3 straight lines, and slider 7 moves at the longitudinal direction of back leg 3 like this because the conversion of switch 23 moves, slider 7 can on the longitudinal direction of back leg 3 on or move down.

One block housing 26b is installed to the bottom of Connection Element 26 with pin 36,36, shown in Figure 73 A or 73B.Block 17 is set among the block housing 26b on one, and is mobile with what stop slider 7 to make progress.One limit switch 17 is used as this stop assembly 17, shown in Figure 73 A or 73B.One past multiblock 19 is arranged on wherein, to guarantee the action of limit switch 17.

On multiblock 19, two isolated and be in a straight line each other elongated hole 19a, 19a are arranged, shown in Figure 74 B.Be provided with the outstanding conical surface 19b that is in a straight line with elongated hole 19a, 19a toward multiblock 19, also be extended with a projection 19d from side toward multiblock 19.In this projection 19d, be provided with a dog hole 19c.Be fixed in the block housing 26b, shown in Figure 74 A at the direction of motion of slider 7 two pins 27,27 that are provided with that separate each other.Two pins 27,27 are contained in respectively in two elongated hole 19A, the 19A of multiblock 19.When toward multiblock 19 when slider 7 moves, stretch out from block housing 26b toward the lower end of multiblock 19.And pin 28a is fixed in block housing 26 on the slider 7, and extension spring 28 is connected to pin 28a and toward between the dog hole 19c of multiblock 19.

By such structure, past multiblock 19 is by 27,27 guiding of pin.When the pulling force of extension spring 28 is applied on multiblock 19, reach outside the block housing 26b toward the lower end of multiblock 19.As a result, slider 7 upwards moves, and the 7f end (shown in Figure 74 A) of slider 7 is upwards pressed toward multiblock 19.Then, the pulling force that overcomes extension spring 28 toward multiblock 19 moves up.When slider 7 moved down again, past multiblock 19 was owing to the pulling force that is subjected to extension spring 28 just stretches out towards slider 7 outsides.

According to this embodiment, the operation with Foldable baby handcart of said structure will be described as follows.

Figure 73 A shows the slider 7 that stops at top dead centre after moving on the longitudinal direction of back leg 3.At this moment, the following end in contact of the 7f of slider 7 end and past multiblock 19, and promote gradually toward multiblock 19 upwards.As a result, limit switch 17 is disconnected, and motor 13 stops the rotation.

The slider state that shows at this figure is corresponding to the seat tool of the expansion shown in Figure 66.Side lever 6 promotes foreleg 2 forward, so that leg opens.Simultaneously, depression bar 5 recedes, and is hinged to the pin 32 on the slider 7 and the pin 31 that is hinged on the handrail 4 supports, and thus, baby stroller is unfolded.Meanwhile, foreleg side lever 54, slider connecting rod 56 and rear leg link 57 are unfolded, so baby stroller laterally is being unfolded.

Shown in Figure 73 B, when motor 13 is switched on, screw rod 9 rotations.As a result, sliding members 8 moves down, and slider 7 vertically moves down along back leg 3.When slider 7 reached lower dead center, limit switch 18 was disconnected, and motor 13 stops operating.

The result that slider 7 moves down also moves down the hinge portion (pin 34) between slider 7 and the side lever 6.The foreleg 2 that is hinged to side lever 6 other ends with pin 33 rotates around the pin joint (pin 30) of foreleg 2 and back leg 3, so that foreleg 2 is folding towards back leg 3.By this way, baby stroller is by longitudinal folding, shown in Figure 67.

On the other hand, along with left and right slider 7,7 moves down, left and right foreleg 2,2 is folding to back leg 3,3 by side lever 6,6.Simultaneously, the front end of swinging block 51 rotates along its rotating shaft by connecting rod 52, shown in Figure 67.See from the outside, be fixed in swinging block 51 the second bevel gear 50b, turn clockwise.Rotation along with the left and right second bevel gear 50b50b, the left and right first bevel gear 50a, 50a also rotate, the left and right foreleg sleeve 43,43 that is fixed on the first bevel gear 50a, the 50a rotates in opposite direction, the result, the foreleg side lever 54 that two ends are fixed on the sleeve 43,43 is folded along left and right pin 54c, 54c, thereby causes left and right foreleg 2,2 by laterally folded.

Shown in Figure 71, folding movement along with baby stroller, the slider connecting rod 56 that its two ends are hinged on the slider 7,7 is folding towards centrally-pivoted axle pin 56a and 57a round left and right pivot pin 58,58, left and right pivot pin 58,58 is hinged on the rear leg link 57, and slider 7,7 is moved down.As a result, left and right back leg 3,3 is by laterally folded.

By this way, the whole framework of baby stroller is folded up as shown in Figure 65, and like this, framework is folded up at horizontal and vertical both direction.

When motor 13 reverse rotations, the direction rotation that the screw rod direction of rotation when screw rod 9 moves down to cause slider 7 is opposite.Along with sliding members 8 moves up, slider 7 also moves up.When slider 7 reaches top dead centre shown in Figure 73 A, toward multiblock 9 with the 7f end in contact of aforesaid the same manner with slider 7.As a result, be pushed upwardly toward multiblock 19, limit switch 17 is disconnected, and motor 13 also is disconnected power supply then.

Relevant with moving up of slider 7, slider 7 also moves up with the hinge portion (pin 32 and 34) of depression bar 5 and side lever 6.Opposite with the aforementioned operation mode, depression bar 5 recedes, and handrail 4 turns back to level.In addition, foreleg 2 is subjected to thrust forward, and leg is opened as a result.By this way, the whole framework of baby stroller is trailed as shown in Figure 66.

Along with moving that the slider 7,7 through connecting rod 52,52 makes progress, the first bevel gear 50a and the second bevel gear 50b rotate towards opposite direction, cause foreleg side lever 54 effectively to be trailed once more thus.Corresponding to this expansion action of foreleg side lever 54, back leg side lever 55 also is unfolded.Meanwhile, slider connecting rod 56 and rear leg link 57 are trailed once more, and the result is unfolded the whole framework of baby stroller on horizontal and vertical both direction, shown in Figure 64.

In the above-described embodiments, motor 13, screw rod 19, sliding members 8 and stop assembly 17,18 only are contained in the back leg 3.Yet present embodiment is not limited to illustrated embodiment.Certainly, the power source that moves up or down of slider 7 also can be provided by two back legs 3,3 respectively.

The 7th embodiment

With reference to Figure 75 to Figure 97, the 7th embodiment will be illustrated below.

Accompanying drawing 95 to 97 shows two fold-type baby strollers of present embodiment, adopts same label to represent with components identical in the four fold-type baby strollers of representing among Figure 75 to 94.

With reference to above-mentioned accompanying drawing, the side member that is positioned at four fold-type baby strollers, one side of present embodiment will be illustrated below.Shown in Figure 77, Connection Element 41 is a rectangle U shape cross section, and it is fixed in the upper end of foreleg 2.The upper end of back leg 3 is clamped in the both sides of Connection Element 41, and the upper end of Connection Element 41 and back leg 3 is hinged as pivot pin 30.Foreleg 2 and back leg 3 can be around being in baby stroller pivot pin 30 rotations longitudinally.Foreleg 2 is made by pipe, and back leg 3 is made by the pipe fitting with rectangular cross section.Element with other shape also is available.The bottom of foreleg 2 and back leg 3 is equipped with wheel 11 respectively.

The bottom of depression bar 5 is hinged rotationally with the rear end of handrail 4 by pin 31.This depression bar 5 is made by round tube or analog.By adjusting the spacing between handrail 4 head lamp brush guard pivot pins 30 and the pivot pin 31, depression bar 5 can desirable angle recede.

One end of side lever 6 is hinged to the upper end of foreleg 2 by pivot pin 33.The other end of side lever 6 is connected on the protruding 7j of slider 7 by pivot pin 34.This side lever 6 remains on open configuration with foreleg 2 and back leg 3.Stretching degree depends on the distance between pivot pin 33 and 34 between foreleg 2 and the back leg 3.

In Figure 77, a sleeve 56 usefulness screws or pin 5h are connected on the depression bar 5.On the excircle of sleeve 5b, have elongated guide hole 5c.The head 5d of screw or pin 5h is connected to the bottom of folding rod 5a and meshes with elongated guide hole 5c, and therefore, folding rod 5a can rotate on the circumferencial direction of depression bar 5.

Shown in Figure 79, the assembly of depression bar 5 and folding rod 5a is set at the both sides with respect to baby stroller framework longitudinal center.Left and right folding rod 5a, 5a are hinged to the both sides that are positioned at the button box of installing on baby stroller longitudinal center top 22 respectively, the result, around left and right folding rod 5a, the 5a of depression bar 5,5 separately, make the rearward possibility that is folded into of framework, by swivel becket shown in Figure 76.

Referring to accompanying drawing 83A to 83C, will the foldable structure of Connection Element 60 be illustrated below.One housing 61 (shown in the dotted line) is fixed in the button box 22.Each of Connection Element 60,60 is formed by inner member 60a that foldably is fitted together and outer member 60b.Inner member 60a is connected with housing 61, and outer member 60b links to each other with folding rod 5a.Inner member 60a and outer member 60b couple together in the folding in the horizontal direction mode of big activation by bearing pin 60c.

One through hole 60d is through inner member 60a, and also is provided with a jack 60e among the outer member 60b.Left and right bar 62a that the back will be described and 62b can insert among through hole 60d and the 60e simultaneously, and left and right bar inserts among through hole 60d and the 60e and will cause inner member 60a and outer member 60b to be lockable, and it is impossible that folding inside and outside element become.When left and right bar 62a and 62b move on to the central authorities of housing 61, the inner member 60a and the outer member 60b that are positioned at the button box dual-side are released from lock-out state, and two folding rod 5a, 5a become and can freely fold with respect to the direction of button box 22 with approximate horizontal.

Button box 22 is made up of a horizontal displacement mechanism and a haulage gear, and horizontal displacement mechanism comprises left and right bar 62a and the 62b shown in Figure 83 A and 83B, and haulage gear comprises metallic cable 23a and the 23b shown in Figure 83 D and 83E.Clearer for what show, show each position of mechanism respectively from Figure 19 A to 19E.These mechanisms all are contained in the housing 61.

One elongated hole 61a (shown in the dotted line) is positioned at the approximate center of housing 61, shown in Figure 83 A to 83B. Two action button 22a and 22b are arranged on the bottom of housing 61, and they can be by being contained in compression spring 22c among operating knob 22a and the 22b respectively with the downward restoring force of 22d and vertical moving.

One lock pin element 63a and pin element 63b are set on the side of upwards raised sides of action button 22a and 22b.

Make horizontal channel, upper and lower 61b on housing 61, guide runner 64a and 64b are configured in 61 li of housings respectively by this way, and promptly they can be along housing internal upper part and lower passage horizontal slip.Aforesaid bar 62a and 62b flatly are connected to the outer ledge of guide runner 64a and 64b respectively.As previously mentioned, bar 62a and 62b are internally among the jack 60e of through hole 60d across and into outer member 60b on the element 60a.

Extend an oblique elongated hole 65a from angle, stretch out an oblique elongated hole 65b from angle near the guide runner 64b of the lock pin element 63a on the action button 22b near the guide runner 64a of the lock pin element 63a on the action button 22a.One guide pin 69 is meshed with elongated hole 61a on the housing 61, also is meshed with vertical elongated hole 65a and 65b simultaneously.Guide pin 69 is also held by the groove that make on lock pin element 63a top.Guide runner 64a and 64b are drawn by spring 59a and 59b respectively, and spring has pulling force on the rightabout of bar 62a and 62b front end.

As previously mentioned, the horizontal mobile mechanism of left and right action button 22a and 22b is arranged on around the longitudinal center of baby stroller framework symmetrically.Can see from Figure 83 B, when left action button 22a is depressed, the guide pin 69 that is meshed with lock pin element 63a moves up along the elongated hole 61a on the housing 61, simultaneously, guide pin 69 servo-actuated in the oblique elongated hole 65 of left guide runner 64a, as a result, guide runner 64a moves right along horizontal channel 61b.Along with moving right of guide runner, the left bar 62a that is connected with left guide runner 64a also moves right, and the front end of left subsequently bar 62a shifts out from the jack 60e of left outer member 60b, and like this, left Connection Element 60 becomes collapsible.

After left action button 22a was depressed, right sliding shoe 64b and right bar 62b finished above-mentioned sequence of operations process in the same way.Like this, after pushing left action button 22a simply, two bar 62a and 62b be motion inwardly, and left and right Connection Element 60,60 produces folding movement.As a result, they on horizontal direction simultaneously left, right folding bar 5a, 5a folding (seeing Figure 83 C).

Right action button 22b, right guide runner 64b, right bar 62b have identical structure with its parts in the left side.The mode of operation of right action button 22b is also identical with left action button 22a.Like this, no matter be that left action button 22a or right action button 22b are depressed, left bar 62a and two bars of right bar 62b are inwardly motion all.

Independent action button 22a and the 22b that is provided with draws two metallic cable 23a and 23b respectively.

Pulley 66a and 66b are set at the side of housing 61, and it can be respectively around its central shaft 67a and 67b rotation, as Figure 83 D and 83E.Metallic cable lock pin 23c and 23d fix with the front end of metallic cable 23a and 23b respectively and join with the circumferential outer surface of slide block 66a and 66b respectively.Particularly, but lock pin 68a and 68b also the circumferential outer surface of pulley 66a and 66b join.This lock pin 68a and 68b are meshed rotationally with from the outstanding pin element 63b of action button 22a and 22b.As a result, along with moving up of action button 22a and 22b, around central shaft 67a and 67b rotation, therefore, metallic cable 23a and 23b can be pulled respectively for pulley 66a and 66b.

This metallic cable 23a and 23b pass the inside of folding rod 5a and depression bar 5, and are guided by slider 7 described later, and slider is shown in Figure 86.These slidably metal wire 23a or 23b swivel plate 20 and 21 that slider 7 is provided with rotate.The action that action button 22a or 22b are depressed makes metallic cable 23a or 23b be pulled.As previously mentioned, no matter depress action button 22a and still depress action button 22b, left and right bar 62a and 62b be inwardly motion simultaneously, and left and right folding rod 5a, 5a can be folded in the mode shown in Figure 76.

Slider 7,7 is slidably installed around the periphery on left and right back leg 3,3 tops.Left and right slider 7,7 symmetrical structures will be illustrated earlier.Shown in Figure 85 E, slider 7 is provided with biside plate 7a, 7a, and they are with symmetrical manner layout parallel to each other.Shown in Figure 85 B, biside plate 7a, 7a link one together by base plate 7b parallel to each other and top board 7c, thereby form the hole 70 of a cuboid, and back leg 3 is slidably by hole 70.

If back leg 3 is not made by rectangular section tube, also will be corresponding to the shape of back leg 3 cross sections and changes in the cross section in the hole of that side plate 70,70 by slider 7, top board 7c and the made limit of base plate 7b.

Shown in Figure 85 C, comprise that the rectangular channel 7f of conical section 7e forms on the angle of base plate 7b, comprise that the extension 7g of rectangular channel makes at the diagonal place with respect to conical section 7e.Cornu section 7h forms at the opposite position of side plate 7a upside to upper process and with respect to groove 7f from top board 7c.One recessed side forms between projection section 7h and extension 7g.

Be shaped on a through hole 32a on the top of projection section 7h, a pivot pin 32 couples together slider 7 and depression bar 5 by the supporting in this hole.

Shown in Figure 85 E, the upside of two projection section 7h, 7h is instructed to plate 72 and connects together.This indicator board 72 is screwed in screw 72a, 72a on the supporter of the outside of 7h, the 7h of projection making.

Shown in Figure 85 D, two metallic cable latch segments 75 are installed on the inner surface of indicator board 72.It is to be used for fixing the two metallic cable 23a that will be described later, the end of 23b that this metallic cable latch segment 75 is set.On each metallic cable latch segment 75, be shaped on a lockhole 75a, be used for locking each outer tube of metallic cable 23a, 23b, in this lockhole 75a, also be shaped on a through hole 75b, so that allow the wire among each metallic cable 23a, 23b pass.

The bottom of side plate 7a is shaped on a thrust 7j, and it stretches out base plate 7b and stretches out downwards, is drilled with the through hole 34a of supporting pivot pin 34 on this projection 7j.Shown in Figure 77, side lever 6 is hinged to the top of foreleg 2 by pivot pin 33, and the rear end of this side lever 6 is connected with the pivot pin 34 of projection 7j.Therefore, side lever 6 can keep foreleg 2 and back leg 3, so that they separate each other at certain intervals.Further content will be described later, if slider 7 moves at certain vertical upper edge back leg 3, side lever 6 can make foreleg 2 folding.

Have a pedal frame 9 on the back leg 3, it will be referenced back leg 3 and describe in the back.The special construction that is contained in the slider 7 on the back leg 3 will be illustrated in the back.Shown in Figure 85 A or 85E, a lock dog 17 is fixed on the central authorities of the inner surface of gripper shoe 17b, and gripper shoe 17b is arranged between the top edge of extension 7g, 7g of slider 7 both sides.Sidepiece at lock dog 17 is shaped on groove 71a, and the hook 13a of second extension spring, 13 1 sides that will be described later can be hooked onto among this groove 17a.

Elongated otch 73 is inserted into slider 7 with back leg 3 direction forms in top board 7c edge longitudinal center.Shown in Figure 85 D, also be shaped at the inner surface place of top board 7c and crack 74.This cracks 74 for wedge shape and be in straight line with otch 73, this straight line is towards the opposite ends of top board 7c from the inner end of elongated cuts 73, relative with elongated cuts 73 in the position, deep at top board edge so that crack, its most shallow position is then near elongated cuts 73.Interval between the outermost end of the key joint 74 of top board 7c and back leg 3 outer surfaces is greater than the maximum protrusion distance of lock pin 16a at least.The last lock pin 16a that will be described later will at first pass wedge shape at slider 7 and crack 74 when back leg 3 moves up, further extend then to arrive the more following of back leg 32.The last lock pin 16a of motion enters elongated cuts 73 and surperficial outstanding from back leg 3.Go up lock pin 16a like this and just be locked in the inner end of elongated cuts 73, can prevent that thus slider 7 from moving down (seeing Figure 86).

Axle supporting 47 is contained in the bottom of left and right back leg 3,3, is used for the axle of support wheel 11, shown in Figure 84.The bottom that is positioned at the following block 15 on the back leg 3 links together with axle supporting 47 by screw or pin 15a.

Shown in Figure 79 or 80, foreleg sleeve 43,43 is loaded on the predetermined bottom of left and right foreleg 2,2 rotationally.Particularly have a pin or screw 43b to be connected the lower position (seeing Figure 80) that should be scheduled to of foreleg 2, its head stretches out outwardly.Elongated guide hole 43b is around making on foreleg sleeve 43, and the head of screw 43b is positioned at wherein.As a result, foreleg sleeve 43 can rotate in the length range of elongated guide hole 43a.

Further, shown in Figure 79, left and right foreleg sleeve 43,43 links together by foreleg side lever 54.Form by left and right side rod element 54a, 54a and clamping central side rod element 54b therebetween by leg side lever 54. Side lever element 54a, 54a and central side rod element 54b are hinged each other by two pin 54c, 54c.When left and right foreleg sleeve 43,43 rotates backward with opposite direction, side lever 54 can be roughly backward direction be folded into U-shaped (seeing Figure 76) around left and right pivot pin 54c, 54c.

The first bevel gear 50a, 50a are assemblied in respectively on the excircle of foreleg sleeve 43,43.The following describes among the first bevel gear 50a, the 50a.The second bevel gear 50b that is meshed with the first bevel gear 50a is fixed on the outside of foreleg 2, so that it can be around pin 51a rotation, shown in Figure 77.One swinging block 51 stretches out from the second bevel gear 50b place.

With further reference to Figure 77, two ends are curved L shaped connecting rod 52 and are hooked on rotationally between the through hole 6b that make at certain some place on the through hole 51b that makes at swinging block 51 front end places and the side lever 6.

Shown in Figure 78, according to this structure, the left and right slider 7,7 that will illustrate when the back is when the longitudinal direction of back leg 3,3 moves down, and swinging block 51 drives clockwise directions by connecting rod 52 and rotates (direction shown in arrow among Figure 77), and connecting rod 52 can be seen from the side of baby stroller.Shown in Figure 80, when the first bevel gear 50a promoted the second bevel gear 50b and inwardly rotates in the back of framework, left and right foreleg sleeve 43,43 rotated backward toward each other.The result that foreleg sleeve 43 rotates backward makes foreleg side lever 54 be folded into U-shaped around pivot pin 54c, 54c, thereby makes baby stroller by laterally folded.

With further reference to Figure 81 (Figure 81 is a rearview), left and right back leg 3,3 is coupled together by back leg side lever 55.This postero lateral arm 55 is made of left and right side rod element 55a, 55a, and these side lever elements 55a, 55a are hinged together in the one end by a pin 55b, so that it can be upwards folding along longitudinal center's direction of baby stroller axle.The two ends of side lever element 55a, the 55a that is hinged are hinged with left and right following block 15,15 rotationally, and following block 15,15 is fixed on the bottom of back leg 3 by pin 15c, 15c.

In addition, shown in Figure 81, left and right slider 7,7 is connected together by a slider connecting rod 56, and this slider connecting rod 56 is made of two V-arrangement folding rod 56a, 56a.The hinge point that these folding rods 56a, 56a arrange them up.Folding rod 56a, 56a are by a pin 50b vertically hinged each other rotationally along the central point between the back leg 3,3.The two ends of folding rod 56a, the 56a that is hinged are connected with left and right slider 7,7 respectively, so that it rotates around nail 56c respectively, and can make slider connecting rod 56 the longitudinal direction of baby stroller along its center hinge portion move up and turn to folding, shown in Figure 82.

Left and right back leg 3,3 connects together by the top of rear leg link 57 at slider 7,7, shown in Figure 81.As slider connecting rod 56, this rear leg link 57 is made of left and right V-arrangement folding rod 57a, 57a.These folding rods 57a, 57a are rotatably connected to together by pin 57b, and the two ends of these connected folding rod 57a, 57a and left and right last block 14,14 are hinged, be fixed on the left and right back leg 3,3 by pin 57c, 57c and go up block 14,14, rear leg link 57 can be folded in the same plane of baby stroller longitudinal direction.For making rear leg link 57 opposite with the folding direction of slider connecting rod 56, left and right folding rod 57a, 57a should arrange their hinge portion down.

Slider connecting rod 56 and rear leg link 57 are connected together at two hinge portions by pin 58,58, and when being folded, its center hinge portion can stagger mobile mutually.

By this structure, shown in Figure 81, when the baby stroller horizontal spreading, the slider 7 that will be explained below is positioned at the top dead centre place.For this reason, slider connecting rod 56 is unfolded with rear leg link 57 and is in each other on the same straight line.On the other hand, the left and right slider 7,7 that will be described later baby stroller when laterally folded to being displaced downwardly to lower dead center, shown in Figure 82.Slider connecting rod 56 and rear leg link 57 are folded up by pin 58,58, and can make the center be hinged part 56b and 57b can stagger mobile on the longitudinal direction of baby stroller mutually.

Fold mechanism in the present embodiment will be described in detail, and the pedal frame 9 that particularly is located on the left back leg 3 will be illustrated in the back.

Shown in Figure 84, slider 7 places the top of back leg 3, and pedal frame 9 is housed on back leg 3, makes them can be along back leg 3 longitudinal sliding motions.Projection 9a, 9a are included in wedge-like portion 9b, the 9b of the upside formation of pedal frame 9, and this wedge- like portion 9b, 9b are corresponding to wedge-like portion 7e, the 7e of slip 7.When pedal frame 9 moves up, wedge-like portion 7e, the 7e of the wedge-like portion 9b on the pedal frame 9,9b and slider 7 slip that cooperatively interacts, the result, these wedge-like portion interlockings, pedal frame 9 promptly is braked.

On the other hand, when pedal frame 9 when back leg 3 moves down, the lower end of pedal frame 9 will contact with the upper end of the following block 15 that is fixed on back leg 3 bottoms.One pedal 9c is installed, so that it stretches out on the outer surface of pedal frame 9.When whole pedal frame 9 was moved down, the user can depress pedal frame 9 with riding on pedal 9c.

Figure 88 shows the front surface of the back leg 3 that pedal frame 9 is housed.Be provided with an elongated guide hole 10 in the front surface of back leg 3, this hole is provided with along the center from back leg upper end to lower end.

Shown in Figure 84 A and 84B, on the inner surface of clamping block 19, be provided with two groove 19a and 19b with separating each other, clamping block 19 is arranged on the central authorities of the basal surface of pedal 9, so that stretch out towards the inside of back leg 3.Clamping block 18 is fixed on the upper end of back leg 3, and groove 18a makes on the inner surface top of clamping block 18.Equally, as mentioned above, groove 17a is arranged on the clamping block 17 interior (Figure 85 D) of slider 7.

Shown in Figure 86, the upper end of first extension spring 12 hook 12a is hooked on the groove 18a that is arranged in back leg 3 upper end clamping blocks 18, among the groove 19a of its lower end tenaculum 12b clasp joint on the clamping block 19 of pedal frame 9.

It is other and lack end hook 13a on the second a little extension springs 13 than it and be hooked among the groove 17a on the clamping block 17 of slider 7 to be arranged in first extension spring 12, and the following end hook 13b clasp joint of second extension spring 13 is in the groove 19a of the clamping block 19 of pedal frame 9.

Like this, first extension spring 12 and second extension spring 13 are arranged side by side in the back leg 3, and the pulling force that spring action produced when slider 7 and pedal frame 9 moved will be described hereinafter.

Although the compression spring 12 in said structure can adopt coil spring, the flexible member of other form also is available.

In said structure, first spring 12 and second spring 13 all are contained in the inside of back leg.Certainly, these two springs, perhaps one of them also can be contained in the outside of back leg 3.

Have a hole 3a (seeing Figure 87 C) in the side of back leg 3, when slider 7 was positioned at top dead centre and contacts with last block 14, this hole 3a can be on same the straight line, shown in Figure 86 with the inner terminal of elongated hole 73 on the top board 7c of slider 7.3a is corresponding with the hole, also is provided with a spring cavity 44a in the inside of back leg 3, and a pleated sheet spring 45 places this spring cavity 44a.Shown in Figure 87 B, last lock pin 16a is installed on the sheet spring 45a, and when being subjected to the resiliency supported of sheet spring 45a, lock pin 16a can stretch out from the 3a of hole on this.

On the other hand, shown in Figure 86, have a hole 3b (seeing Figure 87 C) in the side of back leg 3, when pedal frame 9 was positioned at lower dead center and contacts with following block 15, the upper edge of this hole 3a and pedal frame 9 was on same straight line.44a is the same with spring cavity, also is provided with a spring cavity 44b in the inside of back leg 3 corresponding to hole 3b, and a pleated sheet spring 45b is contained among this spring cavity 44b.Once lock pin 16b is contained on the sheet spring 45b, shown in Figure 87 B.When being subjected to the resiliency supported of sheet spring 45b, lock pin 16b can stretch out from the 3a of hole on this, shown in Figure 87 C.

Outstanding position 7h, 7h on slider 7 are equipped with two swivel plates 20 and 21 respectively, and they are supported by bolster 78, shown in Figure 87 A.This swivel plate 20 and 21 rotates by the torsion spring (not shown) respectively and resets. Circumferential slot 20b and 21b outside on swivel plate 20 and 21, being respectively equipped with.Oppositely on the excircle of groove 20b and 21b, and the metallic cable 23a that joins with the periphery of pin 25a and 25b and swivel plate 20 and 21 and the front end of 23b are fixed metallic cable 23a and 23b.In addition, swivel plate 20 and 21 is respectively equipped with projection 20a and 21a (Figure 86).

Metallic cable 23a is connected with 22b with two action button 22a respectively by the endoporus on the depression bar 5 with 23b, and button 22a and 22b are located at the top of depression bar 5.If one among action button 22a, the 22b is depressed, metallic cable 23a or 23b are pulled.Relevant with press push button, swivel plate 20 and 21 can rotate around bolster 78.Also can rotate one of among swivel plate 20 and 21 jut 20a and the 21a, go up accordingly lock pin 16a or down lock pin 16b be depressed, the extension of this lock pin can reach the back leg lower surface a bit.Shown in Figure 86, when slider 7 moves from the bottom up, (illustrate with imaginary line among Figure 86), wedge-shaped slot 74 parts on slider 7 top board 7c inner surfaces down press lock pin 16a, and make lock pin 16a reach back leg 3 lower surfaces a bit.Like this, last lock pin 16a just can not stop moving up of slider 7.

Operating process with folding baby stroller of four fold-types of present embodiment said structure will be illustrated.

Figure 89 shows slider 7 and the pedal frame 9 that is positioned at top dead centre.The slider of representing among this figure and the state of pedal frame are corresponding to expression seat tool state among Figure 75.Side lever 6 promotes foreleg 2 forward, so that leg opens.Simultaneously, along the pin 31 that is fixed in handrail element 4 rear ends, the depression bar 5 that recedes, baby stroller just has been unfolded like this.

In the deployed condition of baby stroller, foreleg side lever 54 also launches as Figure 79 illustrates.Similarly, the slider connecting rod 57 between back leg side lever 55, the left and right pin 58,58 also has been unfolded, shown in Figure 90.At this state, last block 14 stops moving up of sliders 7, and goes up lock pin 16a and reach the outside and cooperate with elongated hole 73 on the slider 7, shown in Figure 89.After last lock pin 16a entered into the inner terminal of elongated hole 73, slider 7 just can not move down.

In Figure 89, when pedal frame 9 was positioned at top dead centre, following lock pin 16b was kept depressing by the inner wall surface of pedal frame 9.Therefore lock pin 16b moves down with regard to no longer hindering pedal frame 9 down.If press down pedal frame 9 along back leg 3, with till following block 15 contacts, shown in Figure 91, following lock pin 16b is promptly owing to extend out to the outward flange of pedal frame 9 under the screen resilience effect of sheet spring 45b under compressive state until it.At this moment, the motion that makes progress of pedal frame 9b is prevented from and keeps lock-out state.

Under this state, stretch spring 12 and second extension spring 13 is all trailed downwards for first.Simultaneously, elastic potential energy is stored in two springs 12 and 13.Especially, the tractive force that extension spring 12 has impels pedal frame 9 to move up, and the tractive force that extension spring 13 has impels slider 7 to move down.But the motion that pedal frame 9 makes progress is by lock pin 16b braking down, and slider 7 downward motions are braked by last lock pin 16a.

Further shown in Figure 90, slider 7 keeps inactive state, thereby back leg side lever 55, slider connecting rod 56 and rear leg link 57 also keep deployed condition, shown in Figure 90.

When depressing one of action button 22a or 22b, when causing swivel plate 20 to rotate, shown in Figure 91, the projection 20a of swivel plate 20 will push lock pin 16a, so slider 7 is released from lock-out state.Meanwhile, the tractive force of extension spring 12 is released, and slider 7 just moves down along back leg 3.Shown in Figure 93, when the lower end of slider 7 moves to when contacting with the top edge of pedal frame 9, slider 7 just enters halted state.

Along with being contained in moving down of slider 7 on the back leg 3, on the back leg 3 pedal frame is housed, slider connecting rod 56 and rear leg link 57 can be rotated around left and right pin 58,58, shown in Figure 94.Connecting rod 56 and 57 center hinge portion 56b and 57b are along removing mutually on the baby stroller longitudinal direction as a result.When moving therewith, keep motionless slider 7 also to move down at opposite side, the result, back leg is by laterally folded.Along with the folding movement of back leg, rear leg link 55 also is folded at its hinge point 55b, and the back leg 3,3 of baby stroller is just by laterally folded like this.

On the other hand, along with left and right slider 7,7 moves down, left and right foreleg 2,2 is folding to back leg 3,3 by side lever 6,6, shown in Figure 78.Simultaneously, the front end of swinging block 51 rotates around its rotating shaft by connecting rod 52.Shown in Figure 80, along with the rotation of the left and right second bevel gear 50b, 50b, the left and right first bevel gear 50a, 50a also rotate thereupon.The left and right foreleg sleeve 43,43 that is fixed on the first bevel gear 50a, the 50a rotates backward along opposite direction, the result, the foreleg side lever 54 that two ends are fixed on the sleeve 43,43 is folded around left and right pin 54c, 54c, thereby causes left and right foreleg 2,2 by laterally folded.

In addition, along with moving down of left and right slider 7,7, left and right foreleg 2,2 is folding to back leg 3,3 respectively by side lever 6,6, shown in Figure 76.As a result, baby stroller vertically is being folded.

Like this, along with 7,7 downward the moving of left and right slider, the left and right foreleg 2,2 of baby stroller, left and right back leg 3,3 be by laterally folded, simultaneously, and also by longitudinal folding.The whole framework of baby stroller is folded up as shown in Figure 76, and promptly the framework of baby stroller longitudinally and laterally all is folded.

When swivel plate 21 rotated owing to one of action button 22a and 22b are depressed, shown in Figure 93, the projection 21a of swivel plate 21 will depress down lock pin 16b, thereby pedal frame 9 is promptly discharged from lock-out state.Meanwhile, the tractive force of second extension spring 13 is released, and causes pedal frame 9 to move up.Simultaneously, pedal frame 9 upwards promotes slider 7, and the result causes slider 7 to get back to last block 14 straight position contacting and keeps inactive state.At this moment, last lock pin 16a can prevent that slider 7 from moving down once more.

Along with the motion that pedal frame makes progress, slider connecting rod 56 and rear leg link 57 are got back to their original deployed conditions, and back leg side lever 55 also has been unfolded.Simultaneously, left and right side lever 6,6 rotates around the hinge point (pin 33) of itself and foreleg 2,2, to promote foreleg 2,2 forward.Simultaneously, left and right handrail element 4,4 and left and right depression bar 5,5 are finished and the rightabout operation of above-mentioned folding operation.As a result, left and right foreleg 2,2, handrail element 4,4 and the deployed condition of pressing cash 5,5 to get back to shown in Figure 75.

Simultaneously, left and right swinging block 51,51 rotates in the opposite direction by the left and right connecting rod 52,52 that is hinged on the left and right side lever 6,6.As a result, the left and right second bevel gear 50b, 50b rotate with the direction of getting back to original position.Simultaneously, the left and right first bevel gear 50a, 50a rotate, and make foreleg side lever 54,54 get back to their original deployed conditions once more.

Like this, the baby stroller quilt is as shown in Figure 75 simultaneously in horizontal and vertical expansion.

In above-mentioned structure, if second extension spring 13 is removed, be moved downward to lower dead center even work as pedal frame 9 from back leg 3, do not have downward tractive force yet and act on the slider 7, thereby framework can not be folded.But, if manually folding if the baby stroller framework is designed to, baby stroller has just no longer needed second extension spring 13.

In addition, in said structure, if the first compression spring 13 is removed from back leg 3, even pedal frame 9 is discharged the back and is moved to its lower dead center from lock-out state, also not having tractive force upwards acts on the pedal frame 9, therefore slider 7 can not move up, and framework can not be folded yet.Certainly, manually folding if this framework is designed to, baby stroller has just no longer needed first extension spring 12.

The two fold-type baby strollers of this embodiment will be illustrated.See accompanying drawing 95 to 97, the side member of baby stroller both sides, promptly foreleg 2, back leg 3, handrail element 4, depression bar 5, side lever 6 and other element that they are connected together and the element in the aforesaid four fold-type baby strollers have same 26S Proteasome Structure and Function.

Be contained in slider 7 on the back leg 3 shown in Figure 85, pedal frame 9 is shown in Figure 84.Figure 83 shows the internal structure that is arranged on the button box 22 on the coupling part, depression bar 5,5 middle part.Figure 83 shows lock pin 16a and following lock pin 16b.First and second extension springs 12 and 13 that are contained in back leg 3 inner sides are shown in Figure 86.These elements have identical 26S Proteasome Structure and Function with the employed element of four fold-type baby strollers.

This two foldings baby stroller go-cart can not be by laterally folded, and depression bar 5 also is designed to not collapsible like this.Be fixed on the continuous element at the Connection Element that baby stroller transversely is provided with.

Shown in Figure 96, the top of foreleg 2 and back leg 3 is hinged on the handrail element 4 by pin 30.The rear portion of handrail element 4 is hinged on the depression bar 5 by pin 31, vertically is hinged on the slider 7 by pivot pin 32 and the lower end edge back leg 3 of depression bar 5 slides.One end of side lever 6 is hinged on the slider 7 by pin 34, and the other end is hinged with on the foreleg 2 by pin 33.Like this, framework is arranged symmetrically along the longitudinal axis of baby stroller.Left and right slider 7,7, side lever 8,8a and the 8b of left and right foreleg 2,2, left and right back leg 3,3 scheduled length link together, and such two fold-type baby strollers can be designed to shown in Figure 95.

By depressing pedal frame 9 and action button 22a or 22b, two fold-type baby strollers can vertically be folded or launch along it, the same with the mode of launching with regard to being folded as figure four fold-type baby strollers fully, the framework of four fold-type baby strollers is except laterally being folded and launching.

The 8th embodiment

Referring to accompanying drawing 98 to 102, a kind of the 8th embodiment of Foldable baby stroller will be illustrated.

This Foldable baby stroller has with the basic the same framework of the baby stroller of the 6th embodiment.The difference of the baby stroller of this embodiment and the 6th embodiment only is that slider 7 is driven by motor 13, and in the present embodiment, slider 7 is by manual drives.Stress the 8th embodiment and other those contents of the 6th embodiment phase region below.

In the accompanying drawings, parts identical with the 6th embodiment adopt same numbering to represent, have been omitted about their explanation.Figure 98 is the side view of Foldable baby stroller when deployed condition of present embodiment.Figure 99 is the side view of Foldable baby stroller when folded state.Figure 100 is the zoomed-in view of the critical component of baby stroller among Figure 98.Figure 101 is the zoomed-in view of the critical component of baby stroller among Figure 99.

Slider 7,7 slidably is installed in the outer circumference of left and right back leg 3,3.The cooperation slide block 71 that is fixed on the slider 7 assembles slidably with the depression bar 5 that is hinged on the slider 7.For realizing the purpose of assembling, cooperating formation one assembling part 71a on the slide block 71.On the other hand, for realizing the purpose of assembling, on slider 7, assemble with protrusion 72 with the whole formation one of slider.Cooperate with protrusion 72 to form two assembly unit part 72a and 72b, be used to be installed in assembling part 71a.

This assembling is constituting on assembling with protrusion member 72 direction backward with the assembly unit part 72a on the parts, and assembly unit part 72a can make baby stroller remain on deployed condition.In other words, when baby stroller is unfolded, depression bar 5 is with respect to back leg during with wide-angle tilt, the assembly unit part 72a that forms in this position be installed in cooperate slide block 71 assembling with on the part 71a.Another assembly unit part 72b is constituting with forwards making progress of protrusion 72 with respect to assembling, and it can make baby stroller remain on folded state.In other words, when baby stroller is folded, depression bar 5 is with respect to back leg 3 during with small angle inclination, the assembly unit part 72b that forms in this position can be installed in cooperate slide block 71 assembling with on the part 71a.

Assembling part 71a.Each of assembly unit part 72a and 72b is looked from the side, and its shape is just as crank, shown in Figure 100 and 101.Because assembly unit part 72a has crank shape, is close on these assembly unit part 72 backward directions and forms a projection 72a1 again.Because the effect of this projection can make bigger power be applied on the slide block, and cooperate the assembling of slide block 71 can not cross projection 72a1 with part 71a.As a result, can prevent that baby stroller is folded and remains on deployed condition.

Cooperate slide block 71 to be inlaid in that corresponding assembly unit partly promotes on the setting-in direction by extension spring 73 it on, extension spring 73 is arranged on the inside of depression bar 5.Convertible ground can be connected with the release rope 74 in being arranged on depression bar 5 in an opposite side that cooperates slide block 71 to be pushed side.This release rope 74 is designed to like this, and when the switch that is contained in depression bar 5 upper switches boxes is depressed, this rope will cooperate slide block 71 partly to throw off from assembly unit.

Slider 7 is installed on the pedal frame of not looking out (has two control handles), cooperates slider 71 when assembly unit is partly thrown off with box lunch, and the user can manual in vertical direction mobile slider.

The operation of Foldable baby stroller with present embodiment of said structure will be described below.

Figure 98 and 100 shows the baby stroller that slider 7 contacts with block 21 and be unfolded when remaining on top dead center position.Particularly, when side lever 6 promotes foreleg 2 forward, leg is opened.Meanwhile, the pin 31 that depression bar 5 is hinged on the pin 32 on the slider 7 and is hinged on handrail 4 rear portions supports and recedes, and like this, baby stroller has been unfolded.

In the time will folding baby stroller, the switch that is provided with on the switch enclosure 24 on depression bar 5 tops is depressed.Corresponding this is depressed action, and rope 74 tractions cooperate slide block 71, makes to cooperate slide block 71 and slider 7 to throw off.Cooperating slide block 71 by under the state of throwing off, when depressing pedal frame with hand or pin, slider 7 is manually shifted to the below.To depress action relevant with this, and depression bar 5, handrail 4 and side lever 6 rotate around hinge portion ( pivot pin 31,31 and 35) separately, the result, and depression bar 5 stretches out to the upper right side, and square neck is oblique down gradually for while handrail element 4.

The result that the hinge portion of slider 7 and side lever 6 (pin 34) moves downward makes the foreleg 2 that is hinged on the side lever 6 by pin 33 rotate around the hinge portion (pin 30) that foreleg 2 is hinged on the back leg 3, and the result makes foreleg 2 folding towards back leg 3.Like this, the baby stroller quilt is longitudinal folding.

Be the baby stroller after the unfolded, the switch that is positioned at depression bar 5 upper switches boxes 24 is used aforesaid way and depresses.Metallic cable 74 traction cooperates slide blocks 71, so that itself and slider 7 disengagements.When cooperating slide block 71 to be maintained at disengaged condition, upwards lift pedal frame with hand or pin, slider 7 is manually shifted to the top.With slider 7 make progress mobile relevant, slider 7 is hinged to hinge portion on the depression bar 5 (pivot pin 32 and 34) moves up with side lever 6.Opposite with the mode of folding operation, depression bar 5 recedes, and handrail 4 remains on level once more.Foreleg 2 is pushed opening direction, and the result makes whole baby stroller by such expansion the shown in Figure 98.

The embodiment of other variation represents in sketch.

Figure 102 to 105 is sketch (back with reference to), and it has represented the basic principle of the framework of Foldable baby stroller of the present invention with the lines of sketch.In these accompanying drawings, the sketch of the baby stroller that launches with symbol (A) expression is with the sketch of the folding baby stroller of symbol (B) expression.

The characteristics of first, second baby stroller and the 7th embodiment are that foreleg 2 and back leg 3 are hinged on the handrail element 4 by pin 30 in the top.They belong to the pattern of the baby stroller shown in the sketch 102.Three, the characteristics of the 4th, the 5th, the 6th baby stroller and the 8th embodiment are that foreleg 2 and back leg 3 are hinged on the handrail element 4 by pin 30 in the top and the upper end of back leg 3 is to be hinged on the handrail element 4 by pin 35, and pin 35 is arranged near the pin 30.

Certainly, the baby stroller of the present invention that can be used is not limited to the type of the baby stroller of above-mentioned first to the 8th embodiment disclosure.In other words, the present invention can be used to the baby stroller of any pattern, as long as its framework comprises: be hinged to foreleg 2 and back leg 3 on the handrail element 4 in the top, handrail element 4 is hinged on the rear portion of depression bar 5, depression bar 5 is hinged on the slider 7 in its lower end, slider 7 can be along the vertically moving of back leg 3, and side lever 6 one ends and slider 7 are hinged, and an end and foreleg 2 are hinged.

Equally, the connection between foreleg and the back leg also is not limited to structure above-mentioned, and like this, foreleg 2 and back leg 3 can be hinged on the handrail element 4, shown in Figure 102 by common pivot pin in the top.Foreleg 2 also can intersected with each otherly be hinged on the handrail element 4, shown in Figure 103 by different pins with back leg 3.Convertible ground, foreleg 2 can not intersect each other with back leg 3 yet and is hinged on the handrail element 4 by different pins, shown in Figure 104.Further, the upper end of foreleg 2 can be hinged on back leg 3 tops by pin certain a bit on, and this back leg 3 topmost is hinged on the handrail element 4 by different pins at it, shown in Figure 105.Any in these patterns (shown in Figure 102 to 105), foreleg 2 and back leg 3 are hinged on the handrail element 4 in fact in the top.

Different instructions for uses can be adopted the baby stroller of different embodiment.

The seat tool of first to the 8th embodiment introduction all is a baby stroller.Yet application of the present invention is not limited on the baby stroller.In other words, the present invention can be applicable to the seat tool of any pattern, as long as its framework comprises: be hinged to foreleg 2 and back leg 3 on the handrail element 4 in the top, handrail element 4 is hinged on the rear portion of depression bar 5, depression bar 5 is hinged on the slider 7 in its lower end, can be on the slider 7 along the vertically moving of back leg 3, side lever 6 one ends and slider 7 are hinged, and an end and foreleg 2 are hinged.

For example, the present invention can be used for patient or disabled person's wheelchair, transports patient so that the server can promote wheelchair.Further, when using motor as driving, the present invention can also be used for electric wheelchair.The present invention also can be used for the pushchair that handicapped the elderly uses, the crutch of using when walking to substitute.This pattern pushchair have a seat, when the elderly feels tired on foot, can sit down.The pushchair of this pattern has the inner space of storing luggage usually.And the present invention also can be used for being known as the seat for children of hanger, and by hanging over the side of restaurant desk, it can make perambulator sit securely.

The 9th embodiment

Figure 106 to 107 illustrates the 9th embodiment, and seat of the present invention tool is used on the pushchair that the elderly uses.

Figure 106 is the perspective view of the elderly of present embodiment with folding pushchair.Figure 107 is the side view of the elderly with the pushchair framework.Figure 107 A shows the pushchair of deployed condition.The state that Figure 107 B shows pushchair when being tending towards launching.Figure 107 C illustrates the pushchair of folded state.

The element that this collapsible pushchair is arranged on a side comprises foreleg 2, back leg 3, handrail 4, depression bar 5 and side lever 6, and the element of framework left and right side is identical.The structure that is positioned at the side member of framework one side will be illustrated.The side member bindiny mechanism that is positioned at both sides is identical with the mechanism of previous embodiment, and relevant here its explanation has been omitted.

In the accompanying drawings, the upper end of back leg 3 is hinged on the handrail element 4 rotationally by pin 35, and the upper end of foreleg 2 is hinged to the top of back leg 3 rotationally by pin 30.Foreleg 2 and back leg 3 are equipped with wheel 37 respectively.The rear end of handrail element 4 is hinged on the depression bar sleeve 25 that is sleeved on depression bar 5 bottoms rotationally by pin 31.This depression bar 5 is made by pipe 5, and the one end is by bending.As shown in Figure 4, the part that depression bar 5 is directly bent is connected to each other, to form U-shaped roughly.Depression bar 5 can be with replace the walk crutch of usefulness of the elderly when in evil case.

Slider 7 is slidably installed round the periphery of left and right back leg 3,3.Depression bar auxiliary element 5A is connected on the depression bar sleeve 25 that is set in depression bar 5 bottoms rotationally.The lower end of this depression bar auxiliary element 5A is hinged on the slider 7 by pin 32.One end of side lever 6 is hinged on the slider 7, and the other end is hinged on the foreleg 2.

In first to the 8th embodiment, adopted a Connection Element on the depression bar 5.And in the present embodiment, a rotating depression bar auxiliary element 5A is equipped with in the lower end of depression bar 5.As a result, depression bar 5 becomes collapsible and can be folded into two-section.Because depression bar can be rolled over, whole framework can be folded quite for a short time (Figure 107 C).

As the slider of the 8th embodiment, slider can manually be moved, or adopts the same mode of the 5th or the 6th embodiment, by motorized motions.Further, can be in the first, second, third, fourth or the 7th embodiment, slider is moved by spring.Therefore, be used for the explanation of the mechanism of mobile slider, even the seat tool remains on first covering device of deployed condition and make a tool remain on second covering device of folded state, for for purpose of brevity, relevant its explanation has just been omitted.

A lid 4A who can be used as the seat trails between two handrail elements 4.When the elderly feels tired after walking, can oneself be sitting on the lid 4A that is used as the seat.This seat lid 4A can be opened and closed, space of storing luggage just be arranged on this lid 4A below.Except the top in this space, this space is centered on by a bag shape container 4B, and therefore, luggage can be placed in this space.

Another kind of embodiment variant

Among the embodiment that mentions in front, slider can be moved (embodiment 1 to 4 and 7) by spring, or moves (embodiment 5 and 7) by motor, or by manually moving (embodiment 8).Yet, can also can adopt other device in other embodiments.For example, slider can be moved by the moment of torsion or the cylinder of electronic wheel.

In the foregoing embodiments, the seat tool can fold and launch ( embodiment 1,2 and 7) by spring; The seat tool also can manually launch and fold (embodiment 3 and 4) with spring; The seat tool can fold and launch (embodiment 5 and 6) by motor; And it can also manually fold and launch (embodiment 8).Yet, in making folding and other embodiment that launches of a tool, also can adopt other compound mode of drive unit.

For example, the seat tool can be launched by manually folding by spring; It also can be launched by spring and be folded by motor; It also can be launched by motor and be folded by spring; It also can be launched by motor and be folded by manual; And it also can manually launch and be folded by motor.

In the aforementioned embodiment, the seat tool can be launched and folding by spring, and what launch to adopt is compression spring and folding that adopt is extension spring (embodiment 1 and 2); The seat tool can be launched and folding (embodiment 7) by extension spring.In a further embodiment, the seat tool can be launched and be folded by the compression spring by extension spring; Or by compression spring expansion and folding.In these cases, compression spring or extension spring can adopt torsion spring or coil spring.

In the foregoing embodiments, in first, second and the 7th embodiment, first holding device that makes a tool remain on deployed condition is to go up lock pin 16a, and second holding device that makes a tool remain on folded state is lock pin 16b down.In the 3rd and the 4th embodiment, first holding device is a lock pin 16, and second holding device is compression spring 12.In the 5th and the 6th embodiment, making a tool expansion and the first and second folding holding devices is motors 13.In the 8th embodiment, first and second holding devices are to cooperate slide block 71 with slider 7 is fitted together.Certainly, first and second holding devices are not limited to these elements, and other machinery also can be used as holding device, launch or folded state as long as it can remain on the seat tool.

In the 3rd and the 4th embodiment, the seat tool is manually launched and is folded by spring.The seat tool is remained on the spring 12 of second holding device of folded state for simultaneously collapsible seat tool.In a further embodiment, the seat tool can be launched and be folded by manual by spring, and first holding device that the seat tool is remained on deployed condition can be used as the spring that launches the seat tool simultaneously.

In the aforementioned embodiment, the energy storage device of storing motive force is to promote the spring (referring to folded spring) of the downward movement of slider and promote the spring (referring to launching spring) that slider moves up to be folded into purpose, these springs are used to store manual force (this this power is because the action of extruding downwards causes, as embodiment 1,2 and 7) in hand gear.Certainly, also can adopt other device in other embodiments.For example, it also is available adopting the device of the storage motive force of motor or Electric Motor Wheel torque.

Effect of the present invention

As previously mentioned, the seat tool can be folded by moving down slip (7), keeps by second Device can make a tool remain on folded state. On the contrary, when slider (7) is moved upward, seat Tool can be unfolded. This tool can remain on deployed condition by first holding device. With This mode, the present invention has adopted Novel slide device to substitute traditional slip cap to realize Rotatablely move or change movement. According to this carriage, there is not traditional slip cap rotation fortune Dead point when moving, therefore, it is certain also not need the user to possess when expansion or foldable base tool Technical merit. In other words, adopt this carriage, make the folding and expansion of framework Become a kind of shirtsleeve operation.

According to a third aspect of the present invention, when first holding device is thrown off, slider is logical Cross the effect of folded spring and move down, a seat tool is automatically folded thus. This tool can Remain on folded state by folded spring. By this way, the auto-folder function of seat tool Can realize.

According to a fourth aspect of the present invention, thrown off when second holding device, slider exists Move up under the effect of expansion spring, therefore, a seat tool can be by Automatic-expanding. By launching The spring base tool can be maintained at deployed condition. In such a way, the Automatic-expanding function of seat tool Can realize.

According to the 5th or the 6th aspect of the present invention, motive force can be respectively by storing dress Put and be stored in folded spring and the expansion spring. Releasing device discharges and is stored in folded spring In motive force, thus the seat tool automatically folded. Releasing device discharges and is stored in the expansion bullet Motive force in the spring, therefore the seat tool can automatically be launched. In such a way, the seat tool from Moving folding and launch function and can realize.

According to a sixth aspect of the invention, during the manual depression slider, folded spring and exhibition Open spring and be in bending state, so that motive force is stored in the spring. Like this, manually storage Depositing motive force becomes and is easy to.

According to a seventh aspect of the present invention, slider can be by motor removing. When motor stops During rotation, the seat tool can be maintained at one of expansion or folded state. So just do not need to use The person manually stores motive force, and therefore, the use of seat tool is more convenient.

According to the 9th to the 16 aspect of the present invention, be contained in back leg by depressing easily On pedal frame to bottom dead center position, slider is unlocked, and is contained in the stretching on one of back leg The storage power of spring and Compress Spring is released, and causes slider vertically moving at back leg. Motion is relevant therewith, and left and right foreleg, left and right back leg hold up mistake element and depression bar folded.

For the baby stroller after the unfolded, pedal frame is upwards promoted from the next, and is sliding Moving device upwards promotes, consequence, and the storage power of Compress Spring is discharged easily by pedal frame. With The motion that this slider makes progress is corresponding, left and right foreleg, left and right back leg, handrail element Be unfolded with depression bar. In the Foldable baby stroller of this pattern, slider and foot-operated Frame is designed to free lock pin by the pressing operation button, and action button is arranged on depression bar 5 Top, by depressing pedal frame and action button, the user is folding baby at an easy rate Handcart. Correspondingly, press easily an action button just to launch baby stroller.

As previously mentioned, do not use traditional rotation sliding in the Foldable baby stroller of the present invention Cover. Be to substitute sliding sleeve, the carriage that the present invention adopts is slider, extension spring and Under the effect of compression storage power, this slider can move along back leg. Like this, the user does not need Carry out troublesome operations traditional, that need certain technical capability. Baby stroller is adopting Be unfolded and fold after the aforementioned shirtsleeve operation.

According to the 17 to the 25 aspect of the present invention, depress easily be located at after During leg place pedal frame, slider is disengaged locking, owing to be contained in the upper extension spring of one of back leg With the result of the storage power effect of Compress Spring, slider vertically moves downward along back leg. With When the downward movement of slider is identical, left and right foreleg, left and right back leg, handrail element and Depression bar is folded. Correspondingly, along with the downward motion of slider, side lever and connecting rod rotate, and be front The leg sleeve rotates through first and second bevel gears, and foreleg side lever and a folding tool that makes can be by horizontal strokes To folding up.

In order to launch folded baby stroller, pedal frame is upwards pushed away from bottom dead center position Moving, after the pedal frame release, to store under the power effect at Compress Spring, slider is also made progress Promote. When slider moves up, left and right foreleg, left and right back leg, handrail Element and depression bar have been unfolded. Correspondingly, along with the movement that slider makes progress, side lever and company Bar rotates, and the foreleg sleeve is through first and second bevel-gear rotatings. The straight line of foreleg side lever launches So that the seat tool is by horizontal spreading.

In the Foldable baby stroller of this pattern, slider and pedal frame are designed to Remove locking by the pressing operation button, action button is arranged on the top of depression bar, by To the once-through operation action of pedal frame and action button, the user can be simultaneously horizontal and vertical To the folding baby handcart. Equally, by pressing operation button easily, baby stroller Also can be unfolded horizontal and vertical.

As previously mentioned, Foldable baby stroller of the present invention does not use traditional rotation Support set. For substituting this support set, the carriage that the present invention adopts is slider, does Be the result of extension spring and the effect of Compress Spring storage power, slider can move along back leg. Like this, the user needn't carry out operation traditional, that need the trouble of certain technical capability. After aforementioned shirtsleeve operation, baby stroller can folded or expansion.

The 26 to the 32 aspect according to the present invention is when being located at riding on the back leg After frame was depressed, slider vertically moved down back leg, left and right back leg, left and right Foreleg, handrail and depression bar are folded.

For the baby stroller of unfolded, by slider being removed locking, the compression bullet The result of the storage power of spring (or tractive force of stiff spring) effect makes slider from lower dead center The position moves up. The motion that makes progress with slider interrelates, left and right foreleg, left and right Back leg, handrail element and depression bar are unfolded.

In the Foldable baby stroller of this pattern, slider is designed to by pressing The action button that is contained in depression bar top is removed locking, this just so that the user by depressing pin Stepping on frame comes the folding baby handcart to become possibility. Equally, by pressing operation button easily, Baby stroller can be unfolded.

As previously mentioned, Foldable baby handcart of the present invention does not adopt traditional rotation Support set. For substituting this support set, the carriage that the present invention adopts is slider, Compress Spring is stored under the effect of power (or stiff spring tractive force), and slider can move along back leg Moving. As a result, the user needn't carry out trouble traditional, the certain technical merit of needs again Operation, baby stroller just can be adopted aforementioned shirtsleeve operation mode and folded and expansion.

According to the 33 to the 3rd nineteen aspect of the present invention, be contained in back leg by depressing Pedal frame, slider can vertically moving downward along back leg. Along with slider moves down, Left and right foreleg, left and right back leg, handrail element and depression bar are folded. Correspondingly, Along with slider moves down, side lever and connecting rod move, and the foreleg sleeve is through first and second umbrellas Gear rotates. The jackknife action of foreleg side lever so that the seat tool by laterally folded.

For the baby stroller of unfolded, after slider is unlocked, at Compress Spring Under the effect of restoring force (or extension spring tractive force), slider upwards moves from bottom dead center position Moving. With the synchronized movement that slider makes progress, side lever and connecting rod rotate, and the foreleg sleeve is through first With second bevel-gear rotating. The foreleg side lever by the generate straight line so that the seat tool also by horizontal spreading.

In the Foldable baby stroller of this pattern, this slider is designed to by by press-fiting Button on depression bar top is removed locking, and the user jumps off pedal frame with regard to the Foldable baby hand Go-cart. Equally, baby stroller also can be unfolded because of the pressing operation button.

As previously mentioned, Foldable baby stroller of the present invention does not adopt traditional rotation to prop up Support set. For substituting support set, the carriage that the present invention adopts is slider, at the compression bullet Spring screen resilience (or extension spring tractive force) effect is lower, and slider can move along back leg. As a result, The user needn't carry out loaded down with trivial details operation traditional, the certain technical merit of needs, and adopts Aforementioned shirtsleeve operation mode, baby stroller just can be unfolded and fold.

According to the 40 to the 44 aspect of the present invention, by the rotation of screw rod, sliding Moving device can be along back leg vertically move up or down employed motor with rotating Be contained on the back leg. As a result, slider can move up or down, the slip of joining with side lever The hinge portion of device and depression bar be also along vertically the moving up or down of back leg, thus the foreleg quilt Push back leg to or be pushed forward. Foreleg and back leg just are opened or closed like this. Simultaneously, The handrail element is by towards rear-inclined or get back to level, and depression bar stretches out or backwards towards vertical direction Tilt. By this way, baby stroller can be by or expansion longitudinal folding at it.

As previously mentioned, Foldable baby stroller of the present invention does not adopt traditional rotary type to prop up Support set. For substituting this support set, the carriage that the present invention adopts is slider, by behaviour Vertical motor switch, slider can move up or down along back leg. As a result, the user needn't Carry out loaded down with trivial details operation traditional, that need certain technical ability, only adopt aforementioned shirtsleeve operation, Baby stroller just can be unfolded and fold.

According to the 45 to the 4th nineteen aspect of the present invention, by the rotation of screw, Slider can longitudinally move down, and the motor of screw turns is contained on the back leg. Slider The result who moves down, left and right foreleg, left and right back leg, handrail element and depression bar are rolled over Folded. Simultaneously, along with slider moves down, side lever and connecting rod rotate, and the foreleg sleeve is through first With second bevel-gear rotating. The jackknife action of foreleg side lever so that the seat tool by laterally folded Come.

When motor is reversed driving, screw rod carries out described rotation when slider moves down Backward rotation, slider moves up from bottom dead center position. Like this, along with slider makes progress Mobile, side lever and connecting rod move, and the foreleg sleeve is by first and bevel-gear rotating. Before The leg side lever be unfolded in line so that the seat tool by horizontal spreading.

As previously mentioned, institute of the present invention folding baby handcart does not adopt traditional rotary type to prop up Support set. For substituting this support set, the carriage that the present invention adopts is slider, by behaviour Make the switch of motor, slider moves up or down along back leg. As a result, the user needn't Carry out loaded down with trivial details operation traditional, the certain technical ability of needs, and adopt aforementioned shirtsleeve operation side Formula, baby stroller will be unfolded or be folding.

The 50 to the 55 aspect according to the present invention is four fold type and two fold-type babies Common first of handcart stretches under the effect of spring and the second extension spring pulling force, forms sliding The slider of moving device moves along back leg, and four fold type baby stroller is all horizontal and vertical Collapsible and launch, and two fold-type baby strollers are only longitudinal folding at it and launch.

In the baby stroller of four fold type and two fold-types, be arranged in a back leg by depressing On pedal frame, slider is unlocked, and is located at drawing of second extension spring on the back leg Power makes slider vertically move down along back leg. Along with the downward movement of slider, left and right Foreleg, left and right back leg, handrail element and depression bar are folded.

Under the situation of four fold type baby stroller, the foreleg side lever is along with slider moves down And folded, such as the Connection Element of slider connecting rod and rear leg link class by at its hinge portion The place is folding. As a result, foreleg and back leg are by synchronously laterally folded.

For the baby stroller of unfolded, and do not consider that it is four fold type or two fold-types, When unclamping pedal frame, because the pulling force effect of first extension spring, pedal frame is by from lower dead center The position upwards promotes. Simultaneously, slider also moves up, subsequently, left and right foreleg, about Back leg, handrail element and depression bar are unfolded.

In the situation of four fold type baby's handcart, the foreleg side lever along with slider upwards Mobile and be unfolded, such as the Connection Element of slider connecting rod and rear leg link class in its articulated section The position is launched again. As a result, foreleg and back leg can be simultaneously at horizontal spreadings.

As previously mentioned, Foldable baby stroller of the present invention does not adopt traditional rotary type to prop up Support set. Be to substitute this support set, the carriage that the present invention adopts is slider, along with the The pulling force of one and second extension spring, slider moves up or down along back leg. As a result, The user needn't carry out loaded down with trivial details operation traditional, the certain technical ability of needs, and adopts aforementioned Shirtsleeve operation mode, baby stroller just can be unfolded and fold.

Claims (35)

1. a Collapsible seating apparatus comprises a framework, and it comprises:

Foreleg and back leg, their upper end are hinged on respectively on the handrail element;

Depression bar is hinged on the rear portion of handrail element respectively;

Slider can and be hinged on the bottom of depression bar along the longitudinal sliding motion of back leg;

End in the two ends of side lever is hinged on the slider, and the other end is hinged on the foreleg.

2. collapsible seat tool as claimed in claim 1 also comprises:

First holding device is used for slider is fixed on the position, so that the seat tool is remained on deployed condition; With

Second holding device is used for slider is fixed on upper/lower positions, so that the seat tool is remained on folded state.

3. the collapsible seat tool that limits as claim 2 is characterized in that: second holding device comprises and is used for the folding spring of using that slider is flexibly upwards promoted.

4. the collapsible seat tool that limits as claim 2 is characterized in that: first holding device comprises that one is used for expansion spring that slider is flexibly promoted downwards.

5. as the Collapsible seating apparatus of claim 2 qualification, also comprise:

One folding use spring, is used for flexibly upwards promotion of slider;

One launches to use spring, is used for slider is flexibly promoted downwards;

One energy storage device, the motive force that is used for storing folded spring respectively and launches spring;

One releasing device is used for discharging respectively that to be stored in energy storage device folding and launch the motive force of spring, and the power that discharges is passed to slider.

6. as the collapsible seat tool of claim 5 qualification, it is characterized in that: energy storage device has a mechanism, and this mechanism is used to store the motive force that folded spring is produced by Manual pressure with launching spring bending.

7. as the collapsible seat tool of claim 2 qualification, it is characterized in that: first device and second device comprise the motor that slider is moved up and/or down.

8. as the collapsible seat tool that claim 1 limited, it is characterized in that: the seat tool is baby stroller, wheelchair at least, and baby' chair and old man are with one in the pushchair.

9. Collapsible seating apparatus as claimed in claim 1 also comprises:

Side lever with predetermined length, it links together with left and right slider, left and right foreleg and left and right back leg respectively;

Be contained in the pedal frame on one of left and right back leg, it along back leg vertically stretch out in slider below;

One extension spring and a compression spring be arranged on the pedal frame back leg vertically on;

The lock dog of one slider is fixed on the upper end of extension spring;

One pedal frame lock dog is fixed on the lower end of extension spring, and the compression spring is crushed between pedal frame lock dog and the minimum bottom of back leg;

Block is connected the top of back leg on one, in case the sliding stop device moves up;

Lock pin releasably is arranged on the top of back leg on one, in case the sliding stop device moves down from the position of being blocked by last block;

Once block is connected the bottom of back leg, moves down to prevent pedal frame; With

Once lock pin releasably is arranged on the bottom of back leg, moves up from the position of being blocked by following block to prevent pedal frame.

10. collapsible seat tool as claimed in claim 1 also comprises:

One foreleg sleeve, it is fixed in the pre-position of foreleg bottom round foreleg, the periphery of first bevel gear and foreleg sleeve is joined, the outside that one second bevel gear is rotatably mounted to foreleg is used for being meshed with first bevel gear, one swinging block is connected on second bevel gear, and a connecting rod is connected rotationally with the swinging block that has side lever;

One foreleg side lever is hinged more thereon, and its two ends are separately fixed on the left and right foreleg sleeve;

One slider connecting rod is hinged in the central, and its two ends are hinged on the left and right slider;

One rear leg link is hinged connection in the central; And its two ends are hinged on the top of left and right back leg respectively;

One slider connecting rod and rear leg link a bit are hinged on together both sides, connecting rod center;

One pedal frame be set at that one of left and right back leg is gone up and along back leg vertically stretch out slider below;

One extension spring and compression spring are by the vertical setting along back leg;

One slider lock dog is fixed on the upper end of extension spring;

One pedal frame lock dog is fixed on the lower end of extension spring, and the compression spring is crushed between pedal frame lock dog and the back leg bottom;

Block is fixed in the top of back leg on one, in case the sliding stop device moves up;

Lock pin releasably is arranged on the top of back leg on one, in case the sliding stop device moves down from the position of being blocked by last block;

Once block is fixed on the bottom of back leg, moves down to prevent pedal frame; With

Once lock pin releasably is arranged on the bottom of back leg, moves up from the position of being blocked by following block to prevent pedal frame.

11. as the Collapsible seating apparatus that claim 10 limited, it is characterized in that: the upper end of left and right depression bar is connected to one another at together, and the upper end of left and right depression bar foldably links together with the two ends of the box of adorning action button respectively.

12. collapsible seat tool as claimed in claim 1 also comprises:

One side lever has predetermined length and links together with left and right slider, left and right foreleg and left and right back leg respectively;

It is last and protruding from slider that pedal frame is arranged on one of left and right back leg;

One compression spring longitudinally is arranged on the back leg and is sandwiched in the lock dog that is fixed in slider and is fixed between the lock dog of back leg;

Block is connected the top of back leg on one, in case the sliding stop device moves up;

Once block is connected the bottom of back leg, in case the sliding stop device moves down; With

One lock pin releasably assembles, in case the sliding stop device moves up from the position of being blocked by following block.

13. collapsible seat tool as claimed in claim 1 also comprises:

One foreleg sleeve, also be fixed in the pre-position of foreleg bottom round foreleg, the excircle of first bevel gear and foreleg sleeve joins, the outside that one second bevel gear is rotatably mounted to foreleg is used for being meshed with first bevel gear, one swinging block is connected on second bevel gear, and a connecting rod is rotatably connected to the swinging block that has side lever;

One foreleg side lever certain point thereon is hinged, and its two ends are separately fixed on the left and right foreleg sleeve;

One slider connecting rod is hinged in the central, and its two ends are hinged on the left and right slider;

One rear leg link is hinged connection in the central, and its two ends are hinged on the top of left and right back leg respectively, a bit being hinged on together of slider connecting rod and both sides, rear leg link center;

One pedal frame is protruding and be set on one of left and right back leg from slider;

One compression spring longitudinally is arranged on the back leg, and is sandwiched in and is fixed in the lock dog on the slider and is fixed between the lock dog of back leg bottom;

Block is fixed on the top of back leg on one, in case the sliding stop device moves up;

Once block is fixed on the top of back leg, in case the sliding stop device moves down;

One lock pin releasably is arranged on the bottom of back leg, in case the position that block blocks under the sliding stop device quilt moves up.

14. Collapsible seating apparatus as claimed in claim 1 also comprises:

One side lever, it has predetermined length and links together with left and right foreleg, left and right back leg and left and right slider respectively;

At least one motor can forward and reversely rotate, and it is arranged on the top of one of left and right back leg at least;

One screw shaft is connected to back leg longitudinally on the machine shaft;

One sliding members, with along back leg vertically movably mode be fixed on slider; With

Be shaped on negative thread on the sliding members, and be screwed in screw shaft.

15. Collapsible seating apparatus as claimed in claim 1 also comprises:

One foreleg sleeve, it is fixed in the pre-position of foreleg bottom round foreleg, the periphery of first bevel gear and foreleg sleeve is joined, the outside that one second bevel gear is rotatably mounted to foreleg is used for being meshed with first bevel gear, one swinging block is connected on second bevel gear, and a connecting rod is rotatably connected to the swinging block that has side lever;

One foreleg side lever certain point thereon is hinged, and its two ends are fixed on respectively on the left and right foreleg sleeve;

One back leg slider connecting rod is hinged in the central, and its two ends are hinged on the left and right slider;

One rear leg link is hinged connection in the central, and its two ends are hinged on the top of left and right back leg respectively, a bit being hinged on together of slider connecting rod and both sides, rear leg link center;

At least one can forward and reverse rotation motor be arranged on the top of one of left and right back leg;

One screw shaft links together in the rotating shaft vertical and motor of back leg;

One sliding members is being connected along the mode of back leg longitudinal sliding motion on the slider; With

The negative thread of sliding members is screwed in screw shaft.

16. Collapsible seating apparatus as claimed in claim 1 also comprises:

One pedal frame is arranged on one of left and right back leg, and vertically stretches out along back leg below slider,

First and second extension springs be arranged side by side the back leg that has pedal frame vertically on, wherein first extension spring is fixed on the lock dog element that is loaded on back leg top in the top, and the other end is fixed on the lock dog of pedal frame, second stretches and draws spring to be fixed in the top on the slider lock dog, and its lower end is connected with the lock dog of pedal frame.

17. collapsible seat tool as claimed in claim 1 also comprises:

The periphery of one first bevel gear and foreleg sleeve is joined;

One second bevel gear is fixed on the foreleg outside and is used for being meshed with first bevel gear;

One swinging block is connected on second bevel gear; One connecting rod is connected to swinging block on the side lever rotationally,

Certain a bit is hinged one cross bar at it, and its two ends and left and right foreleg sleeve link together;

One slider connecting rod is hinged therein to be hinged on the left and right slider with its two ends;

One rear leg link is hinged connection in the central, and its two ends are hinged on the top of left and right back leg; Slider connecting rod and rear leg link be a bit being hinged on together of heart both sides therein; One pedal frame is set at one of left and right back leg, and vertically stretches out along back leg below slider;

First and second extension springs be arranged on abreast the back leg that has pedal frame vertically on, wherein, first extension spring is fixed on the lock dog element that is loaded on back leg top in the top, and the other end is fixed on the lock dog of pedal frame, second extension spring is fixed on the slider lock dog in the top, and its lower end is fixed on the lock dog of pedal frame;

On one block be fixed in back leg top in case the sliding stop device move up;

Lock pin releasably is arranged on the top of back leg on one, in case the sliding stop device moves down from the position of being blocked by last block;

Once block is fixed on the bottom of back leg, moves down to prevent pedal frame;

Once lock pin releasably is arranged on the bottom of back leg, moves up from the position of being blocked by following block to prevent pedal frame.

18. Collapsible seating apparatus as claimed in claim 1 also comprises:

One side lever, it has predetermined length and links together with left and right slider, left and right foreleg and left and right back leg respectively;

One pedal frame is arranged on one of left and right back leg, and below slider vertically stretching out along back leg;

First and second extension springs be arranged side by side the back leg that has pedal frame vertically on, wherein, first extension spring is fixed on the lock dog element that is loaded on back leg top in the top, and the other end is fixed on the pedal frame lock dog, second extension spring is fixed on the slider lock dog in the top, and its lower end is connected with the lock dog of pedal frame;

Block is fixed in the top of back leg on one, in case the sliding stop device moves up;

Lock pin releasably is arranged on the top of back leg on one, in case the sliding stop device moves down from the position of being blocked by last block;

Once block is fixed on the bottom of back leg, moves down to prevent pedal frame; With

Once lock pin releasably is arranged on the bottom of back leg, moves up from the position of being blocked by following block to prevent pedal frame.

19. the collapsible seat tool as one of claim 9 and 10 are limited is characterized in that: extension spring and compression spring are set in the back leg, and the lock dog of slider and the lock dog of pedal frame are passed in the elongated hole that forms on the back leg, stretch out from the inside of back leg.

20. the collapsible seat tool as claim 9 and 10 limits is characterized in that: go up lock pin and following lock pin and supported by flexible member respectively, so that stretch out from the boring of back leg upper and lower, further comprise:

Two swivel plates, they rotatably coaxial line be fixed on the slider and can under resilient force, get back to original position, by the corresponding metal rope, swivel plate is connected with two action buttons that are arranged on depression bar top respectively; With

Protrusion forms on two swivel plates respectively, and when each action button was depressed, swivel plate rotated, and makes each protrusion of swivel plate depress lock pin or lock pin down, makes the extension of lock pin reach a bit of back leg lower face.

21. the collapsible seat tool as one of claim 9 and 10 are limited is characterized in that: extension spring and compression spring are set at the outside of back leg.

22. the collapsible seat tool as one of claim 9 and 10 are limited is characterized in that: extension spring and compression spring all comprise coil spring.

23. as the collapsible seat tool that claim 9,10,12,13,16, one of 17 and 18 is limited, it is characterized in that: the compression spring can be gas spring.

24. as the Collapsible seating apparatus that claim 9,10,16, one of 17 and 18 is limited, it is characterized in that: after removing extension spring, framework can manually be folded.

25. as the collapsible seat tool that claim 9,10,16, one of 17 and 18 is limited, it is characterized in that: after removing the compression spring, framework can manually be launched.

26. as the collapsible seat tool that one of claim 12 and 13 are limited, it is characterized in that: lock pin is supported by flexible member, so that it is protruding from back leg lower side surface; And also comprise:

One swivel plate is rotatably mounted on the slider and also can gets back to original position under resilient force, and by metallic cable, swivel plate can be connected with the action button that is contained in depression bar top; With

One protrusion is made on swivel plate, and when action button was depressed, the rotation of swivel plate made the protrusion of swivel plate depress lock pin, make the extension of lock pin reach the back leg lower face a bit.

27. the collapsible seat tool as one of claim 12 and 13 are limited is characterized in that: an extension spring longitudinally is arranged on the back leg and is sandwiched in the lock dog that is fixed in slider and is fixed between the lock dog on back leg top.

28. as the collapsible seat tool that one of claim 12 and 13 are limited, it is characterized in that: one of compression spring and extension spring are arranged on the inside of back leg.

29. as the collapsible seat tool that one of claim 12 and 13 are limited, it is characterized in that: one of compression spring and extension spring are arranged on the outside of back leg.

30. as the collapsible seat tool that one of claim 12 and 13 are limited, it is characterized in that: one of compression spring and extension spring are coil spring.

31. the collapsible seat tool that is limited as one of claim 14 and 15, it is characterized in that: be fixed on of the periphery setting of the sliding members of slider along back leg, sliding members extend out to the back leg outside along the elongated guide hole that vertically forms at back leg, screw shaft is supported slidably and is screwed in the negative thread that is arranged on the sliding members in the back leg by the inboard of back leg at an upper portion thereof and at a lower portion thereof.

32. as the collapsible seat tool that one of claim 14 and 15 are limited, it is characterized in that: screw shaft is arranged on the back leg outside.

33. as the collapsible seat tool that one of claim 14 and 15 are limited, it is characterized in that: stop assembly is arranged on the upper and lower of back leg, moves up or down to prevent the slider that reaches the precalculated position.

34. the collapsible seat tool as one of claim 14 and 15 are limited is characterized in that: be used to start and the switch that stops motor is arranged on the top of depression bar.

35. the collapsible seat tool as one of claim 17 and 18 are limited is characterized in that: upward lock pin and following lock pin are supported by flexible member respectively and are stretched out from the hole of boring system at back leg upper and lower side surface; And also comprise:

Two swivel plates, they rotationally coaxial line be fixed on the slider and can under resilient force, get back to original position, by the corresponding metal rope, swivel plate is connected with two action buttons that are arranged on depression bar top respectively; With

Protrusion constitutes on two swivel plates respectively, and when each action button was depressed, swivel plate rotated, and makes each protrusion of swivel plate depress lock pin or lock pin down, makes the prolongation of lock pin reach a bit of back leg lower face.

Images