CN1689883A - Foldable baby carriage - Google Patents

Abstract

A stroller includes two right and left front legs (2) respectively having front wheels (1) mounted on the lower ends thereof, two right and left rear legs (4) respectively not only having their upper portions supported rotatably on the substantially central portions of said front legs but also having rear wheels (3) mounted on the rear ends thereof, two right and left hand-push frames (5) respectively rotatable in their peripheral direction, each hand-push frame including an upper portion curved in an inverted-L shape to form a horizontal portion (5a) and a vertically extending lower portion, said lower portion of said hand-push frame can be slid in parallel to said front leg, a first open/close link (6) formed in an X shape, a second open/close link (7) and a connecting portion (9) connecting said horizontal portions of said two hand-push frames together through their joint portions (8) and cooperating with said horizontal portions of said two hand-push frames in forming a grip portion.

Description

Pushchair

Technical field

The present invention relates to a kind of pushchair, when without it, it can easily be folded into compact size.

Background technology

The pushchair of folded form is called as perambulator or baby stroller, its basic structure is based on the similar principles of the folded seat of tube frame type: promptly, can fold and launch to have the front baffle and the rear frame of castor mounted thereto, also can fold and launch the right side and the left side of front baffle and rear frame, thereby reduce its width dimensions, and, this folding or contraction state at this pushchair, upper end preceding and rear frame forms the shape of a picture L, it can be used as the handle that carries of this pushchair, make when the upper and lower train of user, during city motor bus or analogue, the user can carry this pushchair by this L shaped part is placed on she or he the arm.

In this structure, the height dimension of this pushchair is based on such height: when using, an adult uses this pushchair of hand push easily, simultaneously she or he hand is placed on being placed on the L shaped handle on the arm of forming on the upper end of framework.Therefore, when it is folded up, the height dimension of this pushchair remains unchanged, when carrying this pushchair, the castor kiss the earth of pushchair framework, thus make that carrying this pushchair has any problem, make the user when carrying this pushchair, have to keep arm higher, therefore, when carrying this pushchair for a long time, make the performance depreciation that carries of this pushchair.

In order to address this problem, a kind of structure is for example disclosed in Japanese Patent No.2572278, in this structure, reduced the height dimension of pushchair, the centre portion that its front baffle is made at it is folding.

Yet, according to this structure,, at first remove a locking press button that is located on the handle for folding pushchair, then folding handles folds protector again.In other words, this operation is very difficult.

In addition, because can not be locked in this pushchair its folded state, even under the deployed condition of this pushchair, can not automatically activate fold locking mechanisms, must use hand-operated locking press button this pushchair locking, this has just increased because unforeseeable accident may appear in the error of operation.

Also have, except the folding and expansion of this pushchair is operated pretty troublesome, and beyond its structure is very complicated, when this pushchair is in its state of folding up, its front baffle stretches out forward with the shape of broken line, it seems that by the viewpoint that reduces pushchair size in a longitudinal direction this is not preferred; In other words, on practicality, this structure is bad.

In addition, although the toe board self structure of this pushchair is complicated,, this toe board is difficult to fold, and if this toe board is made easy folding, its intensity is just too low; In other words, on practicality, this structure is bad.

Summary of the invention

The objective of the invention is to solve the above-mentioned technical matters of in traditional pushchair, finding.Therefore, the purpose of this invention is to provide a kind of toe board that is used for pushchair, it simple in structure, folding easily, and, the intensity height.Another object of the present invention provides a kind of pushchair, it not only can be mounted thereto above-mentioned toe board, and, when folding up, can reduce its frame size by simple slide, and, in folding and expansion operation, can automatically its be locked and automatically unblank.

Another object of the present invention provides a kind of pushchair, and when folding pushchair, by being easy to operation, it is compact that framework is become, also have, and when fold or launching to operate, the operation that automatically locks and unblank.Specifically, handle portion includes the operating mechanism of a lever locked can sliding in housing, be rotatably installed in a pine oil lever locked in the housing, make easily to stop folding operation, and can easily remove prevention folding operation.Also have, the hand push framework comprises that one makes the locking pin mechanism of stretching out/withdraw and operating mechanism and make and lock the release mechanism that mechanism that pin stretches out/withdraw couples together, thereby can be by being installed in the Sliding Control that operating mechanism in the handle portion carries out the hand push framework, to simplify operation folding and that launch.

According to a first aspect of the present invention, a kind of pushchair is provided, it comprises:

Two right sides and left front leg, they have the front-wheel on the lower end that is installed in them respectively;

Two right sides and left back leg, they not only have the top on the centre portion basically that rotatably is supported on described foreleg respectively, and the trailing wheel on the rear end that is installed in them is arranged;

Two right sides and left hand push framework, they can rotate on their peripheral direction respectively, each hand push framework comprises a top and bottom of vertically stretching that bending to down of a horizontal component of formation is L shaped, the described bottom of described hand push framework is inserted and is respectively fixed to the top of described foreleg and basically in the upper bracket and lower bracket on the centre portion, and they are made them can be parallel to described foreleg slip by the mode that described upper bracket and lower bracket support;

Be made into X-shaped and be rotatably installed in the described upper bracket of described two forelegs and the rear portion of described two back legs between the first opening/closing attaching parts, a pin is supporting the centre portion of the intersection of the described first opening/closing attaching parts;

Be made into X-shaped and be rotatably installed in the lower end of described two hand push frameworks and the second opening/closing attaching parts between the centre portion basically of described two back legs, a pin is supporting the centre portion of the intersection of the described second opening/closing attaching parts; And

A connecting bridge, it links together the blank area of the described horizontal component of described two hand push frameworks by them, and with the described horizontal component cooperation of described two hand push frameworks, form a handle portion.

According to a second aspect of the present invention, according to the described pushchair of a first aspect of the present invention, it also comprises:

Be separately fixed at two handrail base parts on described two forelegs and be connected to a handrail on the bottom of described two handrail base parts by the rotating shaft pin obliquely,

Wherein, when folding described pushchair, described handrail base part and described handrail are folded up, thereby can automatically be folded described pushchair.

According to a third aspect of the present invention, also comprise: a deformable protective ring is installed between described two forelegs according to the described pushchair of a first aspect of the present invention.

According to a fourth aspect of the present invention, also comprise: a deformable protective ring is installed between described two forelegs according to the described pushchair of a second aspect of the present invention.

According to a fifth aspect of the present invention, also comprise to the described pushchair of fourth aspect according to of the present invention first: a deformable sun shade is installed between two sun shade strut bars, these two sun shade strut bars are located at respectively on the upper end of described vertical part of described two hand push frameworks, and are stretched on the direction forward of described pushchair by the there.

According to a sixth aspect of the present invention, a kind of pushchair is provided, it comprises:

Two right sides and left front leg, they have the front-wheel on the lower end that is installed in them respectively;

Two right sides and left back leg, they not only have the top on the centre portion basically that rotatably is supported on described foreleg respectively, and the trailing wheel on the rear end that is installed in them is arranged;

Two right sides and left hand push framework, they can rotate on their peripheral direction respectively, each hand push framework comprises a top and bottom of vertically stretching that bending to down of a horizontal component of formation is L shaped, the described bottom of described hand push framework is inserted and is respectively fixed to the top of described foreleg and basically in the upper bracket and lower bracket on the centre portion, they are made them can be parallel to described foreleg slip by the mode of described upper and lower stent support;

Be made into X-shaped and be rotatably installed in the described upper bracket of described two forelegs and the rear portion of described two back legs between the first opening/closing attaching parts, a pin is supporting the centre portion of the intersection of the described first opening/closing attaching parts;

Be made into X-shaped and be rotatably installed in the lower end of described two hand push frameworks and the second opening/closing attaching parts between the centre portion basically of described two back legs, a pin is supporting the centre portion of the intersection of the described second opening/closing attaching parts; And

A connecting bridge, it links together the blank area of the described horizontal component of described two hand push frameworks by them, and with the described horizontal component cooperation of described two hand push frameworks, form a handle portion,

Comprise an operating mechanism at described connecting bridge,

Described operating mechanism comprises:

A housing, it comprises:

Parts can be deposited in a space in this space;

Be slidably disposed on a lever locked in the described housing;

A fastening ratchet, its thickness is bigger, and is arranged on the leading section of described lever locked;

Can be rotatably set in a pine oil lever locked in the described housing;

A pressures partially that in the part of described pine oil lever locked, forms, this pressures partially is exposed to the outside of described housing;

A function part that in another part of described pine oil lever locked, forms, it can be facing to described fastening ratchet pressurization; And

A handle that is arranged in the parts that integrally form with described pine oil lever locked unclamps the fastening part of line,

When described lever locked can not be slided, described fastening ratchet can not rotate the described function part of described pine oil lever locked, thereby prevents the described pressures partially rotation of described pine oil lever locked, and making described handle unclamp the fastening part of line can not rotate, and

If described lever locked is slided, described fastening ratchet is moved, thereby the described function part of described pine oil lever locked can be rotated, make the described pressures partially of described pine oil lever locked to rotate, therefore, making described handle unclamp the fastening part of line also can rotate.

According to a seventh aspect of the present invention, a kind of pushchair is provided, it comprises:

Two right sides and left front leg, they have the front-wheel on the lower end that is installed in them respectively;

Two right sides and left back leg, they not only have the top on the centre portion basically that rotatably is supported on described foreleg respectively, and the trailing wheel on the rear end that is installed in them is arranged;

Two right sides and left hand push framework, they can rotate on their peripheral direction respectively, each hand push framework comprises a top and bottom of vertically stretching that bending to down of a horizontal component of formation is L shaped, the described bottom of described hand push framework is injected and is respectively fixed to the top of described foreleg and basically in the upper bracket and lower bracket on the centre portion, they are made them can be parallel to described foreleg slip by the mode of described upper and lower stent support;

Be made into X-shaped and be rotatably installed in the described upper bracket of described two forelegs and the rear portion of described two back legs between the first opening/closing attaching parts, a pin is supporting the centre portion of the intersection of the described first opening/closing attaching parts;

Be made into X-shaped and be rotatably installed in the lower end of described two hand push frameworks and the second opening/closing attaching parts between the centre portion basically of described two back legs, a pin is supporting the centre portion of the intersection of the described second opening/closing attaching parts; And

A connecting bridge, it links together the blank area of the described horizontal component of described two hand push frameworks by them, and with the described horizontal component cooperation of described two hand push frameworks, form a handle portion,

Comprise an operating mechanism in described connecting bridge, described operating mechanism comprises:

A spring is used for being pressed onto latched position one side in following described lever locked of normal condition, and in front end one side of the motion of the described fastening ratchet of described lever locked; And

An extendible portion that in described housing, forms and a near engagement groove that the front end of described extendible portion, forms with stretching out,

Wherein, if described lever locked is slided, just make the described fastening ratchet motion of described lever locked, move upward on the described extendible portion, then, engage with described engagement groove, and, if further make the described pressures partially rotation of described pine oil lever locked, described spring makes described fastening ratchet motion, move upward to once more on the described extendible portion, then, automatically be withdrawn into latched position one side.

According to a eighth aspect of the present invention, according to the described pushchair of a sixth aspect of the present invention, wherein, in described hand push framework, comprise a mechanism that makes the locking pin stretch out and withdraw, when the top that keeps described connecting bridge and described hand push framework is in line, this mechanism can engage with described upper bracket, and, if because the pine oil lock operation of described connecting bridge makes described hand push framework rotation, this mechanism can remove it and the engaging of described upper bracket, wherein, in described hand push framework, also comprise a release mechanism, be used for described operating mechanism is connected in the described mechanism that the locking pin is stretched out and withdraw.

According to a ninth aspect of the present invention, according to the described pushchair of a seventh aspect of the present invention, wherein, in described hand push framework, comprise a mechanism that makes the locking pin stretch out and withdraw, when the top that keeps described connecting bridge and described hand push framework is in line, this mechanism can engage with described upper bracket, and, if because the operation that unlocks of described connecting bridge makes described hand push framework rotation, this mechanism can remove it and the engaging of described upper bracket, wherein, in described hand push framework, also comprise a release mechanism, be used for described operating mechanism is connected in the described mechanism that the locking pin is stretched out and withdraw.

According to a tenth aspect of the present invention, a kind of pushchair is provided, it comprises:

Two right sides and left front leg, they have the front-wheel on the lower end that is installed in them respectively;

Two right sides and left back leg, they not only have the top on the centre portion basically that rotatably is supported on described foreleg respectively, and the trailing wheel on the rear end that is installed in them is arranged;

Two right sides and left hand push framework, they can rotate on their peripheral direction respectively, each hand push framework comprises a top and bottom of vertically stretching that bending to down of a horizontal component of formation is L shaped, the described bottom of described hand push framework is injected and is respectively fixed to the top of described foreleg and basically in the upper bracket and lower bracket on the centre portion, they are made them can be parallel to described foreleg slip by the mode of described upper and lower stent support;

Be made into X-shaped and be rotatably installed in the described upper bracket of described two forelegs and the rear portion of described two back legs between the first opening/closing attaching parts, a pin is supporting the centre portion of the intersection of the described first opening/closing attaching parts;

Be made into X-shaped and be rotatably installed in the lower end of described two hand push frameworks and the second opening/closing attaching parts between the centre portion basically of described two back legs, a pin is supporting the centre portion of the intersection of the described second opening/closing attaching parts; And

A connecting bridge, it links together the blank area of the described horizontal component of described two hand push frameworks by them, and with the described horizontal component cooperation of described two hand push frameworks, form a handle portion, and

An operating mechanism that is arranged in the described connecting bridge, can with manual manipulation it, the rotation of described hand push framework pinning, and remove described locking,

A kind of toe board, it comprises:

Two toe board hold-down arms, they are joined to one another at their cores separately, and they are only in that upwards the heart is partially folded therein upward; And

A lockout mechanism is used for described two toe board hold-down arms are locked in horizontality, also comprises a pine oil lockout mechanism, is used for removing the described locking of described two toe board hold-down arms.

According to a eleventh aspect of the present invention, according to the described pushchair of a tenth aspect of the present invention, wherein, the structure of described lockout mechanism made make that when described two hold-down arms were remained on described horizontality, a fastening ratchet that is provided with can move in the gap that produces in mobile block near connecting bridge.

According to a twelveth aspect of the present invention, according to the described pushchair of a eleventh aspect of the present invention, wherein, when described two hold-down arms were remained on described horizontality, described pine oil lockout mechanism can make described fastening ratchet by near the described gap withdrawal that produces described connecting bridge.

According to a thirteenth aspect of the present invention, a kind of pushchair is provided, it comprises:

Two right sides and left front leg, they have the front-wheel on the lower end that is installed in them respectively;

Two right sides and left back leg, they not only have the top on the centre portion basically that rotatably is supported on described foreleg respectively, and the trailing wheel on the rear end that is installed in them is arranged;

Two right sides and left hand push framework, they can rotate on their peripheral direction respectively, each hand push framework comprises a top and bottom of vertically stretching that bending to down of a horizontal component of formation is L shaped, the described bottom of described hand push framework is inserted and is respectively fixed to the top of described foreleg and basically in the upper bracket and lower bracket on the centre portion, they are made them can be parallel to described foreleg slip by the mode of described upper and lower stent support;

Be made into X-shaped and be rotatably installed in the described upper bracket of described two forelegs and the rear portion of described two back legs between the first opening/closing attaching parts, a pin is supporting the centre portion of the intersection of the described first opening/closing attaching parts;

Be made into X-shaped and be rotatably installed in the lower end of described two hand push frameworks and the second opening/closing attaching parts between the centre portion basically of described two back legs, a pin is supporting the centre portion of the intersection of the described second opening/closing attaching parts; And

A connecting bridge, it links together the blank area of the described horizontal component of described two hand push frameworks by them, and with the described horizontal component cooperation of described two hand push frameworks, form a handle portion, and

An operating mechanism that is arranged in the described connecting bridge, can with manual manipulation it, the rotation of described hand push framework pinning, and remove described locking;

Be fixed to a mechanism that makes the locking pin stretch out and withdraw in described hand push framework the inside, its mode makes when the top that keeps described connecting bridge and described hand push framework is in line, this mechanism can engage with described upper bracket, and, if because the pine oil lock operation of described connecting bridge makes described hand push framework rotation, it and the engaging of described upper bracket can be removed by this mechanism; And

Be arranged on a release mechanism in the described hand push framework, be used for described operating mechanism is connected in the described mechanism that the locking pin is stretched out and withdraw; And

A kind of toe board, it comprises:

Two toe board hold-down arms, they are joined to one another at their cores separately, and they are only in that upwards the heart is partially folded therein upward; And

A lockout mechanism is used for described two toe board hold-down arms are locked in horizontality, also comprises a pine oil lockout mechanism, is used for removing the described locking of described two toe board hold-down arms.

According to a fourteenth aspect of the present invention, according to the described pushchair of a thirteenth aspect of the present invention, wherein, the structure of described lockout mechanism made make that when described two hold-down arms were remained on described horizontality, a fastening ratchet that is provided with can move in the gap that produces in mobile block near connecting bridge.

According to a fifteenth aspect of the present invention, according to the described pushchair of a fourteenth aspect of the present invention, wherein, when described two hold-down arms were remained on described horizontality, described pine oil lockout mechanism can make described fastening ratchet by near the described gap withdrawal that produces described connecting bridge.

According to a sixteenth aspect of the present invention, according to the described pushchair of a tenth aspect of the present invention, wherein, described toe board is installed on the bottom of described two forelegs, its mode makes the two ends of described toe board to rotate.

According to a seventeenth aspect of the present invention, according to the described pushchair of a eleventh aspect of the present invention, wherein, described toe board is installed on the bottom of described two forelegs, its mode makes the two ends of described toe board to rotate.

According to a eighteenth aspect of the present invention, according to the described pushchair of a twelveth aspect of the present invention, wherein, described toe board is installed on the bottom of described two forelegs, its mode makes the two ends of described toe board to rotate.

According to a nineteenth aspect of the present invention, according to the described pushchair of a thirteenth aspect of the present invention, wherein, described toe board is installed on the bottom of described two forelegs, its mode makes the two ends of described toe board to rotate.

According to a twentieth aspect of the present invention, according to the described pushchair of a fourteenth aspect of the present invention, wherein, described toe board is installed on the bottom of described two forelegs, its mode makes the two ends of described toe board to rotate.

According to the 20 one side of the present invention, according to the described pushchair of a fifteenth aspect of the present invention, wherein, described toe board is installed on the bottom of described two forelegs, its mode makes the two ends of described toe board to rotate.

According to the 22 aspect of the present invention, according to the described pushchair of a tenth aspect of the present invention, it also comprises:

Be used for operating a release mechanism of described lockout mechanism and pine oil lockout mechanism.

According to the 23 aspect of the present invention, according to the described pushchair of a eleventh aspect of the present invention, it also comprises:

Be used for operating a release mechanism of described lockout mechanism and pine oil lockout mechanism.

According to the 24 aspect of the present invention, according to the described pushchair of a twelveth aspect of the present invention, it also comprises:

Be used for operating a release mechanism of described lockout mechanism and pine oil lockout mechanism.

According to the 25 aspect of the present invention, a kind of pushchair is provided, it comprises:

Two right sides and left front leg, they have the front-wheel on the lower end that is installed in them respectively;

Two right sides and left back leg, they not only have the top on the centre portion basically that rotatably is supported on described foreleg respectively, and the trailing wheel on the rear end that is installed in them is arranged;

Two right sides and left hand push framework, they can rotate on their peripheral direction respectively, each hand push framework comprises a top and bottom of vertically stretching that bending to down of a horizontal component of formation is L shaped, the described bottom of described hand push framework is inserted and is respectively fixed to the top of described foreleg and basically in the upper bracket and lower bracket on the centre portion, they are made them can be parallel to described foreleg slip by the mode of described upper and lower stent support;

Be made into X-shaped and be rotatably installed in the described upper bracket of described two forelegs and the rear portion of described two back legs between the first opening/closing attaching parts, a pin is supporting the centre portion of the intersection of the described first opening/closing attaching parts;

Be made into X-shaped and be rotatably installed in the lower end of described two hand push frameworks and the second opening/closing attaching parts between the centre portion basically of described two back legs, a pin is supporting the centre portion of the intersection of the described second opening/closing attaching parts; And

A connecting bridge, it links together the blank area of the described horizontal component of described two hand push frameworks by them, and with the described horizontal component cooperation of described two hand push frameworks, form a handle portion;

An operating mechanism that is arranged in the described connecting bridge, can with manual manipulation it, the spin locking of described hand push framework, and remove described locking;

Be fixed to a mechanism that makes the locking pin stretch out and withdraw in described hand push framework the inside, its mode makes when the top that keeps described connecting bridge and described hand push framework is in line, this mechanism can engage with described upper bracket, and, if because the pine oil lock operation of described connecting bridge makes described hand push framework rotation, this mechanism can remove it and the engaging of described upper bracket; And

Be arranged on a release mechanism in the described hand push framework, be used for described operating mechanism is connected in the described mechanism that the locking pin is stretched out and withdraw; And

A kind of toe board, it comprises:

Two toe board hold-down arms, they are joined to one another at their cores separately, and they are only in that upwards the heart is partially folded therein upward;

An auxiliary release mechanism is used for operating described lockout mechanism and pine oil lockout mechanism; And

A lockout mechanism, be used for described two toe board hold-down arms are locked in horizontality, also comprise a pine oil lockout mechanism, be used for removing the described locking of described two toe board hold-down arms, the motion on the vertical direction of the operation of the described auxiliary release mechanism of described toe board and described two hand push frameworks interrelates.

According to the 26 aspect of the present invention, according to the described pushchair in the 25 aspect of the present invention, wherein, the structure of described lockout mechanism made make that when described two hold-down arms were remained on described horizontality, a fastening ratchet that is provided with can move in the gap that produces in mobile block near connecting bridge.

According to the 27 aspect of the present invention, according to the described pushchair in the 26 aspect of the present invention, wherein, when described two hold-down arms were remained on described horizontality, described pine oil lockout mechanism can make described fastening ratchet by near the described gap withdrawal that produces described connecting bridge.

Description of drawings

Fig. 1 is according to the lateral plan of pushchair of the present invention and front elevation; Specifically, Fig. 1 (a1 and a2) is its lateral plan and front elevation, the state of its expansion is shown, and Fig. 1 (b1 and b2) is its lateral plan and front elevation, and its folding state is shown;

Fig. 2 is the explanatory diagram at the pushchair of its folded state, shows the state that a user carries this pushchair, holds this car on her arm;

Fig. 3 is the lateral plan of this pushchair in its deployed condition;

Fig. 4 is the lateral plan of this pushchair at its folded state;

Fig. 5 is the enlarged drawing of the part of the pushchair shown in Fig. 3;

Fig. 6 is the exploded perspective illustration that is exaggerated part of this pushchair;

Fig. 7 is the enlarged drawing on the top of the hand push framework that uses in this pushchair; Specifically, the relation of the position between each parts on the top of the lock-out state assistant push framework that shows at it of Fig. 7 (a); And the relation of the position between each parts on the top of the unlocking condition assistant push framework that Fig. 7 (b) shows at it;

Fig. 8 is the forward section-drawing that is located at a steering unit of in-to-in of a connecting bridge, and this connecting bridge is used for the top of above-mentioned hand push framework;

Fig. 9 is the explanatory diagram of the order of operation of above-mentioned steering unit; Specifically, Fig. 9 (a) shows its lock-out state; Fig. 9 (b) shows the state that elastic pressure that securing rod 34 overcomes spring slides into disengaged position; Fig. 9 (c) shows and can trigger the state of locking the bar 35 that unclamps that makes of operating; And Fig. 9 (d) shows the state that fastening ratchet 39 disengagements are engaged with extendible portion 43;

Figure 10 is the section-drawing that is located near the serviceability of a mechanism that the locking pin is stretched out and withdraw the core of vertical bottom of hand push framework; Specifically, Figure 10 (a) shows at its serviceability of when locking; Figure 10 (b) shows when unblanking its serviceability;

Figure 11 is the transparent view of the toe board of center folded form;

Figure 12 is the forward direction section-drawing that is used for pinning a lockout mechanism of this toe board;

Figure 13 (a)-(d) is respectively the explanatory diagram of the order of operation of above-mentioned lockout mechanism;

Figure 14 is used for second of the lockout mechanism of center folded form toe board and pine oil lockout mechanism

The forward direction section-drawing of embodiment;

Figure 15 is the part enlarged drawing of second embodiment that gets along arrow B shown in Figure 14;

Figure 16 is the forward direction section-drawing of toe board, shows its central folding overlapping state; And

Figure 17 is the part enlarged drawing of the toe board got along arrow C shown in Figure 16.

Now, will describe in detail according to the preferred embodiments of the present invention with reference to accompanying drawing.

The specific embodiment

Fig. 1 (a1, a2) is lateral plan and a front elevation according to the general structure of an embodiment of pushchair of the present invention to (b1, b2).More particularly, Fig. 1 (a1, a2) shows the deployed condition of this pushchair, and Fig. 1 (b1, b2) shows the folded state of this pushchair.

Pushchair shown in Fig. 1 comprises and is generally two right sides and left front leg 2, each leg comprises a front-wheel 1 in its lower end, this car also comprises two right sides and left back leg 4, each leg comprises a trailing wheel 3 in its rear end, this car also comprises two hand push frameworks 5, they are supported on respectively on their forelegs 2 separately, its mode makes them can be parallel to foreleg 2 and slides, and can on their peripheral directions separately, rotate, this car also comprises the first opening/closing attaching parts 6, this part can be rotatably set between the rear portion of the upper fixing element of two forelegs 2 and two back legs 4, its mode makes its two parts intersect each other at their core, thereby formation X-shaped, a pin is supporting its core that intersects, this car also comprises the second opening/closing attaching parts 7, this part can be rotatably set in the lower end and basically between the core of two back legs 4 of two hand push frameworks 5, its mode makes its two parts intersect each other at their core, thereby the formation X-shaped, a pin is supporting its core that intersects.

Foreleg 2, back leg 4 and hand push framework 5 are made by lightweight hollow aluminum pipe, steel pipe or analogue respectively.

The shape that two forelegs 2 are done to be in line respectively, or make respectively in their bottom to crooked; While two back legs 4 are made the part bending respectively.And, respectively two front-wheels 1 and two trailing wheels 3 are installed on the bottom of their relevant preceding and back legs 2 and 4.

Front-wheel 1 and trailing wheel 3 comprise two castors respectively, and they have a hill holder, can brake by stepping on this hill holder; And, respectively preceding and trailing wheel 1 and 3 top installation end are injected before their relevant formation in the tube end with back leg 2 and 4, then, be fixed on these tube ends with screw or analogue.

Respectively two hand push frameworks 5 being made is rectilinear form on the whole, and the upper bend separately of handle push framework 5 becomes L shaped respectively, thereby forms right and left horizontal component 5a; In its deployed condition, these right sides are connected to respectively on the connecting bridge 9 at the center of being located at by their relevant connecting bridges 8 point-blank with left horizontal component 5a, and these parts can be used as a handle portion, can use this handle portion of hand push.

Folded state or storage configuration at hand push framework 5, not only can make two horizontal component 5a rotate about 90 degree to start with connecting bridge 8, thereby provide a handle portion that can grasp, and can make these two horizontal components along their relevant forelegs 2 to lower slider, thereby reduce their height dimensions separately, and therefore reduce the height dimension of pushchair.

Except above-mentioned basic frame structure, the two ends of the toe board 10 of center folded form are connected on the lower end separately of two forelegs 2, the structure of toe board is made the core that makes it can only be folded on the direction that makes progress, and, two base parts of handrail of folded form and protective ring 11 are fixed on the top separately of two forelegs 2; And stretch out on the direction forward of pushchair the upper end of the bottom that sun shade strut bar 12 is stretched by the in the vertical direction of two hand push frameworks 5 respectively, and its mode can fold and launch for them.

Can make the stow-away arm rest and the protective ring 11 of folded form fold up and launch.Such as will be discussed below, the reason of making is like this: the protector 11c that is arranged on the core of protective ring 11 is made such as elastoplast or analogue by elastomeric material.Certainly, if child grows, and, therefore do not need to be installed in an annular mounting portion 11c2 on the protector 11c, this protector 11c is located at the core of protective ring 11, therefore, and can be mounting portion 11c2 by removing on the handrail 11b, thereby only stay handrail 11b in protective ring 11, thereby have only handrail 11b to be used as this folding handrail and protective ring 11.

A sun shade 16 is installed between two sun shade strut bars 12, and sun shade 16 is made such as cloth or analogue by deformable material.Like this, because the space between two sun shade strut bars 12 is covered by deformable material, so, even when pushchair is folded up, make two distances between the sun shade strut bar 12 narrower, do not worry that also sun shade 16 can disturb the folding operation of pushchair.

Also have, as shown in Fig. 1 (a), infant seat 14 making by cloth and be installed on foreleg 2 and the back leg 4 by the sack 15 that mesh material is made, thus can fully satisfy requirement for pushchair.By the way, this infant seat 14 and sack 15 are not shown in Fig. 1 (b), in order that see other parts of pushchair easily.

In said structure, be used as at pushchair under the state of baby stroller, as shown in Fig. 1 (a), respectively the first and second opening/ closing attaching partss 6 and 7 are launched, be X-shaped, thereby guarantee enough width, be used for making the baby to sit this wherein.Under this state, two hand push frameworks 5 are risen to their upper positions separately, simultaneously, the horizontal component 5a of handle push framework 5, connecting bridge 8 and connecting bridge 9 are arranged to linear fashion, thereby can use the handle of the part of such straight line setting with hand as it, push away this pushchair, and make its motion, front-wheel 1 is contacted with ground with trailing wheel 3.

For pushchair thus running condition fold up, if operation is located at mechanism's (this mechanism will be discussed in the back) that lock of connecting bridge 9 unclamps, can forward two hand push frameworks 5 to state that they can slide and rotate then.

When the horizontal component 5a that makes hand push framework 5 about connecting bridge 9 rotates the angle of about 90 degree, with hand push framework 5 to lower slider, thereby close two opening/ closing attaching partss 6 and 7, the feasible size that as shown in Fig. 1 (b), on Width, reduces pushchair, and front-wheel 1 and trailing wheel 3 received that this pushchair presents compact collapsed shape under together the state; Simultaneously, the height dimension of pushchair shortened with hand push framework 5 to the cooresponding amount of lower slider.At this state, can automatically pin pushchair.

By the way, at this folded state of pushchair, as shown in Fig. 1 (b), this figure is the front elevation of pushchair, and is folding at the center in vertical direction toe board 10, and protective ring 11 is receded.In addition, protector (annular section of front end) 11c is the centre portion of this protective ring 11, and this part is made such as elastoplast or analogue by elastomeric material.Yet protector 11c also can have other foldable structure; For example, can fit together, thereby produce a handle, can fold into the 3rd to this handle the core members of making by rigid material with by the outer cover that elastomeric material is made.In other words, if this part (protector 11c) flexibly is out of shape, thereby reduce its width, so, protective ring 11 correspondingly is reduced to the width that protector 11c reduces to its width, simultaneously, automatically recedes.Also have,, just can change into sun shade 16 its storage configuration if two sun shade strut bars 12 are folded up.

Therefore, as shown in FIG. 2, if hypothesis is of a size of L (Fig. 1 (a)) at the pushchair of deployed condition, so, its size will be reduced to 0.7-0.8L.Therefore, when under folded state, carrying this pushchair, even when the user carries handle to the horizontal component 5a of the L shaped bending of falling of framework 5 as one on she or he arm, when carrying this pushchair, as long as the user has adult common height, the user just can carry this pushchair with the front end of pushchair and move, and also can not run into ground even the user does not improve his or his arm.Perhaps, even when the user pushes away this pushchair forward by the front the user, the wheel of pushchair is rolled, when this pushchair is moved forward, perhaps, when the user draws this pushchair forward by the back the user, the wheel of pushchair is rolled, when this pushchair was moved, the user can easily make this pushchair move, and this is because less in the size of the pushchair of folded state.

Below with reference to Fig. 3-6 foreleg 2, back leg 4 and hand push framework 5 are described.

In these figure, upper bracket 17 and lower bracket 18 are respectively fixed to the top of each foreleg 2 and basically on the neighboring separately of centre portion by screw B (see figure 6).Make each the base portion 11a of protective ring 11 and the outward flange matched together of upper bracket 17, respectively base portion 11a and upper bracket 17 are fastened on the foreleg 2 together with screw B simultaneously, its mode makes base portion 11a cover the outward flange of foreleg 2.

Form two patchhole 17a in upper bracket 17, they pass upper bracket 17 respectively and stretch, and foreleg 2 and hand push framework 5 can inject respectively and pass these holes.Specifically, front side patchhole 17a is passed on the top of the foreleg 2 of insertion, and with screw B it is fixed to the upper; On the other hand, the function of rear side patchhole 17a is the sliding guide that is used for hand push framework 5.

With the inwall 17b of the contacted upper bracket 17 of hand push framework 5 sides in form locking pin hole a 21 ' (see figure 5) and can make a locking pin 53 that is arranged on hand push framework 5 the insides pass this hole (this is discussed below).

The carriage 19 of a U-shaped is installed on the rear end of upper bracket 17, simultaneously by a rotating shaft pin P an end of the first opening/closing attaching parts 6 rotatably axle journal be installed on the carriage 19.In addition, by a rotating shaft pin P the other end of the first opening/closing attaching parts 6 rotatably axle journal be installed in (see figure 3) on the carriage 20, with screw thread this carriage 20 is screwed on the back leg 4.

Lower bracket 18 (see figure 6)s comprise a side protector 18a and leg-of-mutton rack body 18b who is made by synthetic resin, and this main body is arranged on the inside of side protector 18a, becomes one with it.And leg-of-mutton rack body 18b comprises two patchholes of upward opening in its upper side respectively, thereby can inject two patchholes that pass rack body 18b to foreleg 2 and hand push framework 5 respectively; Therefore, can be fixed to foreleg 2 on the leg-of-mutton rack body 18b with screw B, hand push framework 5 can slide in leg-of-mutton rack body 18b simultaneously.

Therefore, the structure of rack body 18b make not only can handle push framework 5 the lower side and the mode matched together of rear side can slide on the vertical direction of foreleg 2, and a rotating shaft pin P that can be by passing side protector 18a stretching, extension the leading section side of back leg 4 rotatably axle journal be installed on the rack body 18b rear portion.

By the way, in rack body 18b, be a locking pin hole (this is discussed below) in the hole 21 of the insertion position of hand push framework 5 upward opening.In other words, this locking pin hole 21 and locking pin hole 21 above-mentioned ' handle push framework 5 is positioned at dipping of it and its raised position respectively if use, so, locking pin 53 (this is discussed below) stretches out, thereby can remain on two states to pushchair, that is, in folded state and deployed condition.

A housing parts 7a ' (seeing the part of irising out of Fig. 5) is inserted into and is fixed to screw thread on the front end of (columniform) bottom of hand push framework 5, this bottom is stretched out by lower bracket 18, and housing parts 7a ' has the shape of the housing parts that is similar to (Japan) kokeshi toy.Also be provided with a rotating body 7 forming head ', it can not rotate on the axial direction of housing parts 7a ', but can rotate on its peripheral direction.In addition, with a part 7b ' who stretches out of rotating body 7 ' integrally form.Its mode for it rotating body 7 ' stretch out in the radial direction.Also have, the bottom of a U-shaped spare 7c ' is fixed to screw thread on the front end of sponson 7b ', and its mode makes it to rotate on its peripheral direction; By a rotating shaft pin P one end of the second opening/closing attaching parts 7 is connected between the front end of two openings of U-shaped spare 7c '.

Because such structure even hand push framework 5 to lower slider, makes it rotate the angle of about 90 degree simultaneously, can easily make 7 withdrawals of the second opening/closing attaching parts, and without any difficulty.

In addition, by a rotating shaft pin P rear end of the second opening/closing attaching parts 7 is installed on the carriage 20 similarly, this carriage is positioned on the middle basically sweep of back leg 4.

The leading section of back leg 4 stretches out in the anterior side of foreleg 2, and the external part of the leading section of a rubber cap 22 that is used to protect and back leg 4 is assembled together.

The side surface that stretches out the end of the leading section of back leg 4 is connected on the attaching parts 23 of tubulose by a rotating shaft pin P, this attaching parts 23 is used for making handrail 11b to tilt.

Protective ring 11 comprises two base part 11a above-mentioned, they are respectively fixed on their relevant forelegs 2, the rotating shaft pin P that is correlated with by them is connected to two handrail 11b on the bottom of two base part 11a respectively obliquely, protective ring 11 also comprises two front end annular mounting portion 11c2, they form the part of protector 11c respectively, and will with the front end matched together separately of two handrail 11b, protective ring 11 also comprises front end annular section above-mentioned (protector) 11c, this part is made by elastomeric material above-mentioned, and will with the front end matched together of front end annular mounting portion 11c2, protective ring 11 also comprises two attaching partss 23 above-mentioned.By their rotating shaft pin P separately the upper end separately of two attaching partss 23 is connected on the inside separately of two handrail 11b obliquely.

When each protector (leading section annular section) 11c was only made by elastomeric material, the thickness of protector 11c increased, thereby has improved its stiffness, then, with pin protector 11c was fastened on the front end annular mounting portion 11c2.In addition, can subsequently, can cover the outside face of this protector 11c in the centre portion in the cross section of physical member reeve protector 11c with elastomeric material.In addition, also can be with a steel wire or stainless steel flat plate spare as the part in the centre portion in the cross section of injecting protector 11c; Perhaps, can be fastened to firm part on the front end annular mounting portion 11c2 with a pin; Perhaps, can be fastened to a coil spring on the front end annular mounting portion 11c2, thereby can utilize helical spring deformable character, perhaps, can be connected to a planar spring on the front end annular mounting portion 11c2.

Certainly, when pushchair is used for baby that a health growing, can save protector 11c.In other words, in this case, can be respectively remove two front ends annular mounting portion 11c2 by on their relevant handrail 11b, and, can be placed on cap or similarity piece respectively on the front end of their relevant handrail 11b, replace front end annular mounting portion 11c2.

A rubber legs 24 is fitted on the outward flange of lower end of each attaching parts 23, under its deployed condition shown in Fig. 3 and 5, foreleg 2 contacts that this rubber legs 24 is relevant with them respectively, thus support the load that is applied on the handrail 11b.

In addition, under its folded state, because two attaching partss 23 respectively with the upper end of back leg 4 upward to the motion that rotatablely moves, so, two handrail 11b recede respectively, with their relevant rotating shaft pin P starting point, thereby automatically folded on the side of base part 11a as it.In other words, in the folding operation of pushchair, do not need just can automatically fold up handrail 11b with hand rising handrail 11b.Therefore, can make the size of pushchair after folding on its longitudinal direction compacter.

By the way, in the superincumbent description, though represent screw and pin with label B and P indistinction ground, certainly, they can be different on diameter and length, according to being installed, hole size determines, these screws and pin can inject these holes, and, particularly, can replace screw B such as rivet or similarity piece with other connecting element, this depends on their installation site.

Below with reference to a kind of lockout mechanism and a kind of pine oil lockout mechanism that Fig. 7 to 10 describe to launch and the pushchair of folding said structure is used.By the way, Fig. 7 to 9 shows the top of each hand push framework and its operating mechanism respectively, and Figure 10 shows one the locking pin is stretched out and retraction mechanism, and this mechanism can connect use with operating mechanism.

At first, in Fig. 7, a support handle 30 of being made by elastomeric material is fitted on each the horizontal component 5a in two hand push frameworks 5, and its mode stretches upwards the top of the vertical part of each hand push framework 5 for it.

In addition, a lid making with elastomeric material 31 covers the neighboring of each connecting bridge 8.By the way, the structure of connecting bridge 8 is identical or similar with the structure of known traditionally pushchair, therefore, has omitted the description to it here.

Structure referring to connecting bridge 9, the inside that is shaped as the housing of holding easily 32 at its that made by synthetic resin is combined with an operating mechanism, be used for locking connecting bridge 9, and remove this locking, a securing rod 34 is arranged on the top of housing 32, it can about direction on slide, and the core in the bottom of housing 32 is provided with the pine oil lever locked 35 of a flip-over type with stretching out basically.

Now above-mentioned connecting bridge 9 will be described in more detail.

As shown in figs. 8 and 9, housing 32 is arranged in this connecting bridge 9; And housing 32 comprises a space, and this space forms by two plastic mold plastics are screwed in together with screw thread, can deposit a physical member in this space.Core in the inner space that forms like this is provided with a pivot shaft 36, and it and housing 32 integrally form, and, in a centre hole 36 that in pine oil lever locked 35, forms ' rotatably equipped this pivot shaft 36.The structure of pine oil lever locked 35 is made the outside that the pressures partially 35a that makes it and 35b are exposed to a perforate that forms in the housing 32 respectively; Therefore, the user can press these pressures partiallies 35a or 35b by the outside of housing 32.In addition, in this pine oil lever locked 35, with centre hole 36 ' as its center, form a function part 35c on the side relative with 35b with pressures partially 35a, it can carry out the operation (this is discussed below) to fastening ratchet 39 pressurizations.Also have, pine oil lever locked 35 comprises a disk 37, and it is with centre hole 36 ' integrally form, and with this hole concentric; A plurality of positions (in Fig. 8, two positions) at the circumference of this disk 37 are provided with fastening part 37a, the 37b that unclamps line.When a corresponding end that unclamps line 38 is fastened to they relevant fasteningly unclamp the part 37a of line, when 37b is last, promptly, at state shown in Figure 8, if pressurize facing to the pressures partially 35a of pivot shaft 36 on this clockwise direction to pine oil lever locked 35, thereby rotate pine oil lever locked 35 in the clockwise direction, the fastening part 37a that unclamps line and 37b just will draw their relevant lines 38 that unclamps respectively.

As mentioned above, equipped with housing 32 by the lever locked 34 that the synthetic resin material identical with housing 32 is injection molded, its mode makes lever locked 34 to slide on the left and right directions in Fig. 7.Specifically, Fig. 7 (a) shows the position that lever locked 34 is located at the leftmost side on the housing 32, in this position, pine oil lever locked 35 is remained on its state that is lockable (lock-out state), at this state, stops joystick 35 rotations.On the other hand, Fig. 7 (b) shows the state that a lever locked 34 is moved to the left a little by the position shown in Fig. 7 (a) on housing 32.At this state, pine oil lever locked 35 can be rotated, and therefore, pine oil lever locked 35 is maintained at its state that unlocks (unlocking condition).

The structure of lever locked 34 and its associated components will be described below.Be provided with a fastening ratchet 39 in lever locked 34 on the direction of slip at it on the front end of this lever locked 34, a thin centre portion 41 of lever locked 34 is crossed in its position.About the shape of this fastening ratchet 39, it perpendicular to the thickness on the direction of the direction of slip of lever locked 34 significantly than the thickness of this centre portion 41 big (in Fig. 8, approximately twice).In addition, extension spring 40 makes lever locked 34 accumulation of energys in lock-out state one side shown in Fig. 7 (a) usually.

On the other hand, in housing 32 those sides, specifically, in its side relative with pine oil lever locked 35, form the part 42 of the band ladder of a fastening usefulness, its mode makes it that bigger thickness be arranged, and towards the big part of the thickness of lever locked 34, that is, towards the fastening ratchet 39 of lever locked 34; At direction of slip (in Fig. 8, left and right directions), an extendible portion 43 stretches in the part of the heavy gauge of lever locked 34 or the extended line of fastening ratchet 39, and extendible portion 43 is begun by the opposite direction of housing 32, and reaches the position near fastening ratchet 39; Near the front end of this extendible portion 43, form an engagement groove 43 ', fastening ratchet 39 can engage in this groove.

Yet, centre portion 41 and fastening ratchet 39 can be unlike in the said structure like that and lever locked 34 integrally forms, but, for example also can be installed on the front end of lever locked 34 the planar spring that is formed from steel or by the molded item that amilan, aldehyde resin or analogue (they are called engineering plastics) are made.In this case, can freely select the elastic acting force of centre portion 41 and fastening ratchet 39, this so that make the demand can eliminated to the part 42 of the band ladder of fastening usefulness.

The control step of lever locked 34 and pine oil lever locked 35 is described below with reference to Fig. 9 (a)-(d).

Fig. 9 (a) is similar to the lock-out state that Fig. 8 shows connecting bridge 9.

In other words, lever locked 34 is remained on latched position (Fig. 7 (a)), and pine oil lever locked 35 is remained on the state shown in Fig. 8.Therefore, not in the clockwise direction to the pressures partially 35a of pine oil lever locked 35 pressurization, unclamp line 38 and remain on their extended configuration respectively and make.Here, even the user attempts the pressures partially 35a pressurization suddenly in the clockwise direction to pine oil lever locked 35, because between the part 42 of the band ladder of the fastening ratchet 39 of heavy gauge and fastening usefulness without any space movably, so the function part 35c of pine oil lever locked 35 can not rotate, thereby make and to pressurize and allow pressures partially 35a rotate in the clockwise direction.Therefore, remain on the state that can not draw them unclamping line 38.

Then, make lever locked 34 slide to its lockset position of coupler (Fig. 7 (b)) if overcome the spring pressure of spring 40, change to the state shown in Fig. 9 (b) by the state shown in Fig. 9 (a), therefore, the front end of fastening ratchet 39 will contact with extendible portion 43, and this front end is moved upward on this extendible portion 43.

If lever locked 34 further overcomes the lockset position of coupler slip (Fig. 7 (b)) of the spring pressure of spring 40 towards it, fastening ratchet 39 is moved upward on the extendible portion 43, after this, as shown in Fig. 9 (c), it join near the engagement groove 43 of the formation front end of extendible portion 43 ' in.At this state, the that part of of oriented manipulation part 35c no longer is the fastening ratchet 39 of heavy gauge, but the centre portion 41 of the little thickness of lever locked 34, therefore, between the centre portion 41 of this function part 35c of pine oil lever locked 35 and lever locked 34, enough movably spaces are arranged, therefore, can pressurize to pressures partially 35a, and this part is rotated in the clockwise direction.Therefore,, and this part is rotated in the clockwise direction, therefore, can make integrally formed disk 37 rotations of pressures partially 35a therewith, thereby can spur right and line 38 is unclamped on a left side if to pressures partially 35a pressurization.

Also have, when the pressures partially 35a pressurization to pine oil lever locked 35, and when this part was rotated in the clockwise direction, the function part 35c short time of pine oil lever locked 35 contacted with centre portion 41; And, owing to further press pressures partially 35a in the clockwise direction, as shown in Fig. 9 (d), function part 35c raises centre portion 41, and therefore makes the fastening ratchet 39 that integrally forms with this centre portion 41 by engagement groove 43 ' upwards rising.If fastening ratchet 39 is lifted to be higher than extendible portion 43 because the spring pressure of spring 40, lever locked 34 just will be on the direction of the arrow line shown in Fig. 9 (d) by immediately toward pulling back, thereby make fastening ratchet 39 above extendible portion 43.Yet at this state, function part 35c still stops fastening ratchet 39 to return, and therefore, fastening ratchet 39 can not return fully at the state shown in Fig. 9 (a).

After pulling out right fully and a left side unclamp line 38, then right and a left side are being unclamped the stage that line 38 unclamps, when pressures partially 35b pressurization to pine oil lever locked 35, and therefore pine oil lever locked 35 is rotated in the counterclockwise direction, thereby the function part 35c that makes pine oil lever locked 35 can make fastening ratchet 39 turn back to the position shown in Fig. 9 (a) during toward swivel motion.

Yet, when unclamping two application forces that unclamp line 38 when very strong, even because still can not allow pine oil lever locked 35 rotate in the counterclockwise direction to its pressures partially 35b pressurization, so, even to pressures partially 35b pressurization, fastening ratchet 39 can not return the position shown in Fig. 9 (a).

Now, Figure 10 shows a kind of stretching out and retraction mechanism, be used for making locking pin 53 to stretch out and withdraw, this locking pin 53 is arranged in two hand push frameworks 5 each, stretching out and withdrawing of locking pin is to interrelate with pulling of having described with reference to figure 8 of unclamping line and the operation of loosening, that is, be with because the pulling of the clickwise of pine oil lever locked 35 is right and the operation of line 38 is unclamped on a left side and because the left-hand revolution of pine oil lever locked 35 loosens the operation of a right and left side unclamping line 38 interrelates.

The locking pin here stretch out with retraction mechanism be such mechanism: by upwards shake hands push framework 5 and make it rotate about 90 the degree angles, this mechanism will make be arranged on the locking pin stretch out with retraction mechanism in locking pin 53 stretch out, therefore it is injected the lock hole 21 ' (see figure 5) that forms in upper bracket 17, thereby pushchair is fixed to its deployed condition (seeing Fig. 1 (a)), perhaps, withdraw downwards by making hand push framework 5, and make it rotate the angle of about 90 degree, this mechanism will make be arranged on this locking pin stretch out with retraction mechanism in locking pin 53 stretch out, therefore it is injected lock hole 21 (see figure 5)s that form in lower bracket 18, thereby pushchair is fixed to its folded state (seeing Fig. 1 (b)).

Below, in Figure 10, will describe a kind of situation: in the case, the locking pin stretches out the position that moves to the lower bracket 18 that remains on folded state with retraction mechanism.Yet, this operation itself with stretch out at the locking pin that to move to the situation of position of the upper bracket 18 that remains on deployed condition identical with retraction mechanism, difference just lock hole 21 ' the position for rotated angles of about 90 degree with respect to lock hole 21.

Refer again to Figure 10, this figure is arranged near the core of vertical part of bottom of hand push framework locking pin to stretch out section-drawing with retraction mechanism, shows the operation of this mechanism; Specifically, Figure 10 (a) shows the operation of locking pin 53 lockings, and Figure 10 (b) shows the operation of the locked state of the pin 53 of unblanking or unlock.

In Figure 10, the locking pin stretches out with retraction mechanism and comprises a fixedly block 50, the shape of this block is divided into two sections resulting shapes by the cooresponding cylindrical block of the handle and the internal diameter of hand push framework 5, and this block is fixed to the inside of hand push framework 5, the locking pin stretches out with retraction mechanism and also comprises a sliding block 51, it can slide along hand push framework 5, the position of its reduction is limited by the part 50a of a band ladder that forms on the lower side of fixing block 50, the locking pin stretches out and also comprises with retraction mechanism and can put in hole 52, and can be by a locking pin 53 of this hole withdrawal, hole 52 forms in hand push framework 5, and its mode makes the direction of slip of it and sliding block 51 stretch with meeting at right angles.

Form the hole 50b and the 51a of two fracture shapes on the top separately of two blocks 50 and 51, the other end of unclamping line 38 is connected to the bottom in the hole of sliding block 51, in a compression coil spring 54 inserting hole 50b and 51a, because the spring pressure of this compression coil spring 54 pulls to the fixedly part 50a of the band ladder of block 50 to sliding block 51 usually.

Locking pin 53 comprises a pin leading section 53a, and is included in the flange 53c of the bevelled slidingsurface 53b that the rear portion of pin leading section 53a forms; Because exert pressure in the rear portion of the flange 53c of 55 pairs of lockings of the spring of inserting hole 50c pin 53, make locking pin 53 under normal circumstances be in its direction of stretching out of leaving hole 52, fixedly leaving this hole 50c in the block 50, make it vertical with the longitudinal direction of hand push framework 5.

On the other hand, on the lower side of sliding block 51, leave the hole 51b of a lengthening, this hole makes the leading section 53a of locking pin 53 can stretch out the amount of the movement travel that equals sliding block 51, simultaneously, that side forms an inclined surface 51c who guides sponson on the back of the body surface of sliding block 51, and this surface can engage with the slidingsurface 53b of locking pin 53.

In said structure, do not drawing under the state that unclamps line 38, as shown in Figure 10 (a), because the pressure of compression coil spring 54, sliding block 51 contacts with the fixing part 50a of the band ladder of block 50, and inclined surface 51c is maintained at the position of its reduction, the result, the leading section 53a of locking pin 53 is protruding by hole 52, and further or stretch into the lock hole 21 that in upper bracket 17, forms ' in, perhaps stretch in the lock hole 21 that in lower bracket 18, forms.This has limited the motion on the vertical direction of hand push framework 5.Locking pin 53 put in lock hole 21 ' in and with the state of this lock hole 21 ' engage under, hand push framework 5 is positioned at its raised position, therefore, pushchair is remained on or is locked in its deployed condition.On the other hand, locking pin 53 put in the lock hole 21 and with state that this lock hole 21 engages under, hand push framework 5 is positioned at the position of its reduction, therefore, pushchair is remained on or is locked in its folded state.

By means of above-mentioned trigger action, if as represented, upwards draw and unclamp line 38 by the arrow (1) among Figure 10 (b), the spring pressure that will make sliding block 51 overcome compression coil spring 54 upwards raises, the result, the leading section 53a of locking pin 53 withdraws as represented by the arrow (2) among Figure 10 (b) along bevelled surface 51c, enter in the hand push framework 5, no longer can see.

In this case, hand push framework 5 slides own become possibility, as represented by the arrow (3) among Figure 10 (b).At this moment, even stop trigger action, the leading section 53a of locking pin 53 may only contact with the inner peripheral wall of lower bracket 18.

As can by top see, at folded state, locking pin 53 affacts in lower bracket 18 on the locking pin hole 21 that forms, in deployed condition, locking pin 53 act on similarly the locking pin hole 21 that forms in the upper bracket 17 ' on.

In the mode of mentioning in the above, if because up or down slide and rotary manipulation, locking pin 53 or with the locking pin hole 21 that in upper bracket 17, forms ' engage, perhaps engage with the locking pin hole 21 that in lower bracket 18, forms, so, because the spring pressure of compression coil spring 55 can make locking pin 53 automatically stretch out, and makes locking pin 53 be fixed to the position of locking pin hole.Therefore,, when pushchair forwards folded state to by deployed condition, or when opposite, can automatically be locked in folded state to pushchair if carry out the pine oil lock operation one time, or deployed condition.

Below with reference to Figure 11-13 a kind of locking and unlocking mechanism are described, it be used for the center folded form toe board locking and unblank.

At first, figure 11 illustrates the profile of toe board 10.This toe board 10 is by synthetic resin, die casting aluminium or similar material are made, it comprises an oblong stretcher 60 basically, a hold-down arm 61 that comprises also that bottom with an end of stretcher 60 integrally forms and stretch by its, also comprise another hold-down arm 63, it is arranged on the other end side of stretcher 60, and only with a rotating shaft pin 62 on the lower surface of the centre portion basically by being located at stretcher 60 upwards folding upward, also comprise two carriages 611 and 631, they integrally form with the end separately of two hold-down arms 61 and 63 respectively, and can be fixed on the neighboring separately of two forelegs 2.

In addition, as illustrated in Figure 12, the inside of this toe board 10 comprises a mobile block 64, it is arranged on hold-down arm 61 1 sides, and, compression coil spring 65 on the direction of another hold-down arm 63 1 sides to this block stress, also comprise a fastening ratchet 67, it is located at the other end one side of mobile block 64 and therefrom stretches out, and can make it move to the upper surface of another hold-down arm 63, thereby another hold-down arm 63 is locked in horizontality, also comprise a Rotating Plates 69, by a pin 68 it rotatably is supported on lower surface one side of mobile block 64, also comprise a pine oil locking press button 70, it integrally is arranged on the end of lower surface of Rotating Plates 69, and an end of lower surface stretches out thus, also comprise a locking pawl 691, it is arranged on the top of the other end of Rotating Plates 69, and stretch out on top thus, this locking pawl can contact with the other end surface of mobile block 64, thereby limits the motion of mobile block 64.

In addition, in a side of the fastening ratchet 67 of mobile block 64, between hold-down arm 61 and Rotating Plates 69, be provided with second compression coil spring 65 ', therefore, under normal condition, apply an application force, this power is separated from each other hold-down arm 61 and Rotating Plates 69.

Form one and engage recess 64a on the end sides of mobile block 64, it can hold locking pawl 691 therein.

Also have, a contact block 71 is set on the lower surface of hold-down arm 63 with stretching out, it can contact with Rotating Plates 69, thereby Rotating Plates 69 is rotated.

Deployed condition at the toe board 10 shown in Figure 11 and 12, as the arrow line (1) among Figure 13 (a) is shown, if an external force F is applied on the pine oil locking press button 70, Rotating Plates 69 is rotated on the direction of the arrow line (2) of Figure 13 (a).As a result, make locking pawl 691 motions, and therefore because the pressure of Rotating Plates 69, overcome the application force of compression coil spring 65, mobile block 64 is moved on the direction of the arrow line (3) of Figure 13 (a), thereby make fastening ratchet 67 motions, and therefore can make hold-down arm 63 rotations.By the way, by carrying out this operation to pressing down pine oil locking press button 70 with hand.Because remove fastening ratchet 67, and hold-down arm 63 is rotated, if hold-down arm 63 rotates a bit in the counterclockwise direction a little, just will stop mobile block 64 to left movement, if pine oil locking press button 70 is unclamped with hand, because second compression coil spring 65 ' application force, will apply application force to Rotating Plates 69 by its inside, therefore, as shown in Figure 13 (b), make locking pawl 691 motions of Rotating Plates 69, enter among the joint recess 64a (seeing Figure 12), thereby can keep the unlocking condition or the state that unlocks.

Then, if because folding operation makes toe board 10 upwards fold into certain angle in the centre, as shown in Figure 13 (c), contact block 71 just will contact with Rotating Plates 69, thereby Rotating Plates 69 is rotated in the clockwise direction, thereby Rotating Plates 69 is separated with mobile block 64.

In addition, as shown in Figure 13 (d), in above-mentioned angle because second compression coil spring 65 ' application force, make Rotating Plates 69 to be applied application force, thereby make Rotating Plates 69 return its level attitude by its inside.In this process, because spring pressure travels forward mobile block 64, therefore, the front end of the fastening ratchet 67 of mobile block 64 and the rotating curved surface collision of hold-down arm 63.

Therefore,, so, can make toe board return its horizontal side, and it still keep the state of unlocking if carry out the operation that makes toe board 10 return its level attitude by this state, that is, and at unlocking condition; If make toe board return horizontality, so, because spring pressure can make mobile block 64 travel forward once more, thereby the fastening ratchet 67 of mobile block 64 is moved on the hold-down arm 63, as illustrated in Figure 12, make and to lock toe board once more.

Therefore, in operation, when folding toe board, the lock-out state that the user can be only need remove toe board with hand once, when launching toe board, the user does not need to pin toe board with hand once more.

Yet when folding above-mentioned toe board 10, the lock-out state that need remove it with hand once.In order to realize this operation, in fact, the user must be moved on to the front of pushchair by the back, squats down, and with hand pine oil locking press button 70 is pressurizeed; That is this operation quite trouble of getting up.

Therefore, hope is fully automatically removed the locking-in state of toe board 10 and toe board 10 is pinned.Now, Figure 14 to 17 shows such realization of fully automatically unblanking and locking of toe board 10.

Describe second embodiment of toe board 10 below with reference to Figure 14 to 17, in this embodiment, can fully automatically realize unblanking and locking of toe board 10.By the way, in these figure, do not draw and the identical or similar parts of the parts that in above-mentioned first embodiment, adopt, perhaps, represent them, and will only describe the fresh content of present embodiment with other label with identical label.

In Figure 14-17, be provided with a sliding block 80 in the inside of the toe board 10 that stepped plate 60 is set, its structure is made the top that the fastening ratchet 80a of front end that a compression coil spring 81 makes it is positioned at the rotation end of another hold-down arm 63.In addition, sliding block 80 is connected on the end that unclamps line 82.

Along foreleg 2 other end that unclamps line 82 is pulled out, and this other end is connected on the cam 83 (it is discussed below), that side is installed to this cam on the foreleg 2 in the bottom of lower bracket 18.

The do not draw remainder of structure of second embodiment, still, they are with shown in Figure 12 identical, and their function is also with shown in Figure 12 identical.In other words, they comprise by a pin and rotatably being supported on the Rotating Plates of lower surface one side of sliding block 80, integrally be located on the end of lower surface of Rotating Plates and a pine oil locking press button stretching out of an end of lower surface thus, and locking pawl, it is located at the top of the other end of Rotating Plates, and stretch out on top thus, and this locking pawl can contact with the other end surface of sliding block 80, thus the motion of limit slippage block 80.

In addition, the side at the fastening ratchet 80a of sliding block 80 is provided with second compression coil spring between hold-down arm 61 and Rotating Plates 69, and it applies an application force under normal condition, and hold-down arm 61 and Rotating Plates 69 are separated from each other.Form one and engage recess on the end sides of mobile block 80, it can hold locking pawl therein.

Also have, a contact block is set on the lower surface of hold-down arm 63 with stretching out, this block can contact with Rotating Plates 69, thereby Rotating Plates 69 is rotated.

On the other hand, the cam front surface of cam 83 can engage with cam bottom pin 84, and this pin is located on the bottom of hand push framework 5, and is stretched out by this bottom, and therefore when pin 84 moves up and down bottom the cam, cam can rotate.

Deployed condition at pushchair, promptly, as shown in Figure 14 and 15, at the rising state of hand push framework 5, the front portion of cam 83 is rotated up, unclamp line 82 and unclamp thereby make, the result, make sliding block 80 move to another hold-down arm 63 1 sides, make the upper bond of its fastening ratchet 80a and the round end of another hold-down arm 63, thereby be locked in the central folding overlapping state of toe board 10.

State thus, if reduce by means of folding operation handle push framework 5, as shown in Figure 16 and 17, the bottom of cam 83 is rotated down, unclamp line 82 thereby upwards draw, this acting force of the spring that makes sliding block 80 overcome compression coil spring 81 is return, thereby the round end of the fastening ratchet 80a that makes sliding block 80 and a hold-down arm 63 separates, and makes to remove locking to the central folding overlapping state of toe board 10.

Therefore, as illustrated in Figure 16, realize that by means of folding operation it is possible that the center of toe board 10 folds.

With previously described embodiment relatively, according to present embodiment because can automatically realize removing locking by means of folding operation to toe board 10, so, can further simplify the folding of toe board 10 and launch operation.

Can be expressly understood by top description, not only can obtain simple in structure, the folding and high toe board of intensity easily, and the pushchair that this toe board is installed on it can be withdrawn its hand push framework when folding by simple slide, and, when folding and expansion, can automatically its be locked and unblank, therefore, it uses easily.

Claims (5)

1. a pushchair comprises an operating mechanism in its handle portion, be used for locking folding operation and remove such locking,

Described operating mechanism comprises:

A housing, it comprises:

Parts can be deposited in a space in this space;

Be slidably disposed on a lever locked in the described housing;

A fastening ratchet, its thickness is bigger, and is arranged on the leading section of described lever locked;

Can be rotatably set in a pine oil lever locked in the described housing;

A pressures partially that in the part of described pine oil lever locked, forms, this pressures partially is exposed to the outside of described housing;

A function part that in another part of described pine oil lever locked, forms, it can be facing to described fastening ratchet pressurization; And

A handle that is arranged in the parts that integrally form with described pine oil lever locked unclamps the fastening part of line,

When described lever locked can not be slided, described fastening ratchet can not rotate the described function part of described pine oil lever locked, thereby prevents the described pressures partially rotation of described pine oil lever locked, and making described handle unclamp the fastening part of line can not rotate, and

If described lever locked can be slided, described fastening ratchet is moved, thereby the described function part of described pine oil lever locked can be rotated, make the described pressures partially of described pine oil lever locked to rotate, therefore, making described handle unclamp the fastening part of line also can rotate.

2. a pushchair comprises an operating mechanism in its handle portion, is used for locking folding operation and removes such locking, and described operating mechanism comprises:

A spring is used for being pressed onto latched position one side in following described lever locked of normal condition, and in front end one side of the motion of the described fastening ratchet of described lever locked; And

An extendible portion that in described housing, forms and a near engagement groove that the front end of described extendible portion, forms with stretching out,

Wherein, if described lever locked is slided, just make the described fastening ratchet motion of described lever locked, move upward on the described extendible portion, then, engage with described engagement groove, and, if further make the described pressures partially rotation of described pine oil lever locked, described spring makes described fastening ratchet motion, move upward to once more on the described extendible portion, then, automatically be withdrawn into latched position one side.

3. toe board, it comprises:

Two toe board hold-down arms, they are joined to one another at their cores separately, and they are only in that upwards the heart is partially folded therein upward; And

A lockout mechanism is used for described two toe board hold-down arms are locked in horizontality, also comprises a pine oil lockout mechanism, is used for removing the described locking of described two toe board hold-down arms.

4. according to the toe board described in the claim 3, it is characterized in that, the structure of described lockout mechanism made make that when described two hold-down arms were remained on described horizontality, a fastening ratchet that is provided with can move in the gap that produces in mobile block near connecting bridge.

5. according to the toe board described in the claim 3, it is characterized in that when described two hold-down arms were remained on described horizontality, described pine oil lockout mechanism can make described fastening ratchet by the described gap withdrawal that produces near described connecting bridge.

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