CN211731518U - Automatic folding children's shallow - Google Patents

Abstract

The utility model discloses an automatic folding children's shallow, including the collateral branch frame that two symmetries set up, every collateral branch frame includes the folding first four-bar linkage of interlock and the four-bar linkage of second, and first four-bar linkage is including rotating preceding connecting rod, back foot bar, lower connecting rod and the back connecting rod that connects in proper order, and the four-bar linkage of second is including rotating preceding foot bar, back foot bar, first connecting rod and the second connecting rod that connect in proper order, be provided with the extension spring between preceding foot bar and the back foot bar, tie point between first connecting rod and the second connecting rod has the dead point position, during folding, preceding connecting rod rotates and draws close to the back foot bar, orders about after the dead point position is crossed to the tie point, preceding connecting rod rotates under the effort of extension spring and draws close to the back foot bar. The utility model discloses children have set up the extension spring between foot bar and the back foot bar in the front, worked as after the dead point was crossed to the tie point, the front foot bar can be moved close to the rotation of back foot bar automatically under the extension spring effort, and it is convenient to receive the car, simple structure moreover, realizes easily.

Description

Automatic folding children's shallow

Technical Field

The utility model relates to a children's shallow especially relates to an automatic folding children's shallow.

Background

For carrying convenience, the existing stroller is generally foldable. Most children's shallow comprises frame and cloth cover, and the frame is connected by many connecting rods and is formed, and the cloth cover is hung and is established and form seat and back on the frame. The frame generally includes two side supports arranged symmetrically, a plurality of cross bars are arranged between the two side supports, each side support includes at least one quadrangle, when one corner of the quadrangle is locked, the frame is in an unfolded state, and when the locking mechanism is unlocked, the side supports can be folded.

In order to improve the convenience of use, some carts may be automatically folded. For example, CN204055890U discloses a stroller, wherein the stroller frame comprises a front frame and a rear frame disposed across each other, a push rod having a lower portion pivotally connected to an upper portion of the rear frame, an upper link having an upper portion pivotally connected to the push rod, and a lower link having a lower portion pivotally connected to the rear frame, the rear frame having a pivot connected to a sliding member slidably disposed on the front frame along a length extending direction of the front frame, two of the lower portions of the upper link and the upper portion of the lower link and the upper portion of the front frame being pivotally connected, and the third portion being pivotally connected to one of the two or a total of the three portions being pivotally connected.

Also, CN205365713U is an automatic folding baby stroller, comprising a seat assembly, the front end and the rear end of the seat component are respectively connected with the front wheel component and the rear wheel component, the backrest is connected with the seat component through a shaft and is arranged above the seat component, seat subassembly below be equipped with the main gear box, the main gear box both ends are equipped with drive assembly, drive assembly power take off end is connected with rear wheel subassembly and link rod subassembly one end respectively, the link rod subassembly other end and front wheel subassembly pin joint, the drive assembly top is equipped with the riser subassembly, be equipped with the hand protector subassembly between riser subassembly and front wheel subassembly, hand protector subassembly one end and front wheel subassembly pin joint, the hand protector subassembly other end rigid coupling is on the riser subassembly, the riser subassembly top is connected the gearbox joint subassembly, go up gearbox joint subassembly top and connect the handle subassembly, go up and be equipped with the hand (hold) gearbox in the gearbox joint subassembly, the main gear box provide power prior to the hand (hold) gearbox.

For another example, CN203739943U discloses a foldable stroller, comprising a stroller frame having an unfolded state and a folded state, a front wheel, a rear wheel, and a locking mechanism for locking the stroller frame in the unfolded state, wherein the stroller frame at least comprises a support rod extending along the vertical direction, and a sliding member slidably disposed on the support rod along the length direction of the support rod, when the locking mechanism is locked, the sliding member and the support rod are fixed to each other, and the stroller frame is in the unfolded state; when the locking mechanism is locked, the sliding part can slide along the length direction of the support rod and can drive the cart frame to fold, a driving device which can unlock the locking mechanism and drive the sliding part to slide up and down along the length direction of the support rod is arranged between the sliding part and the support rod, and a boosting device which is used for driving the wheel body of the front wheel or the rear wheel to rotate is further arranged on the cart frame.

The stroller disclosed in CN205365713U and CN203739943U are relatively complex, although they can achieve automatic folding. The stroller disclosed in CN204055890U is relatively simplified in structure, but has more limitations on the structure of the frame.

SUMMERY OF THE UTILITY MODEL

The utility model provides an automatic folding children's shallow has solved current children's shallow structure complicacy, is difficult to realize automatic folding problem.

The utility model provides an automatic folding children's shallow, includes the collateral branch frame that two symmetries set up, every collateral branch frame includes the folding first four link mechanism of interlock and the four link mechanism of second, and first four link mechanism is including rotating preceding connecting rod, back foot bar, lower connecting rod and the back connecting rod of connecting in proper order, and the four link mechanism of second is including rotating preceding foot bar, back foot bar, first connecting rod and the second connecting rod of connecting in proper order, be provided with the extension spring between preceding foot bar and the back foot bar, tie point between first connecting rod and the second connecting rod has the dead point position, and during folding, preceding connecting rod rotates and draws close to the back foot bar, orders about after the dead point position is crossed to the tie point, preceding connecting rod rotates under the effort of extension spring and draws close to the back foot bar.

Preferably, the top of the front connecting rod is rotatably connected with a hand push rod, and the hand push rod and the front connecting rod are basically in the same straight line and are rotatably connected, so that the length of the folded cart can be further reduced.

More preferably, the first four-bar linkage mechanism is provided with a locking mechanism, when the hand push rod is folded and closed to the front connecting rod, the locking mechanism is driven to unlock, unlocking is realized during folding, and the operation of folding the vehicle is simplified.

More preferably, the connection point between the hand push rod and the front connecting rod is superposed with the connection point between the rear connecting rod and the front connecting rod, so that the structure of the trolley is simplified, and the length of the trolley is increased and reduced to the maximum extent.

Preferably, the lower connecting rod and the first connecting rod are integrally formed, and linkage of the two four-bar linkage mechanisms is realized.

More preferably, in the deployed state, a connection point between the first link and the second link is located below the dead point position.

The utility model provides a linkage mode of another kind two four bar linkage, the children's shallow includes the trace, trace one end is rotated with preceding connecting rod and is connected, and the other end rotates with first connecting rod or second connecting rod to be connected.

Preferably, the two ends of the tension spring are respectively connected with the rotating shaft between the second connecting rod and the front foot rod and the rotating shaft between the first connecting rod and the rear foot rod, so that a connecting piece of the spring is not required to be additionally arranged, and the frame structure is simplified.

Preferably, after the folding is completed, the front foot bar and the rear foot bar are in an upright state.

Preferably, in the folded state, the connection point between the lower link and the rear link is close to the bottom of the rear foot bar.

The utility model discloses children have set up the extension spring between foot bar and the back foot bar in the front, worked as after the dead point was crossed to the tie point, the front foot bar can be moved close to the rotation of back foot bar automatically under the extension spring effort, and it is convenient to receive the car, simple structure moreover, realizes easily.

Drawings

Fig. 1 is a schematic structural view of the stroller in the unfolded state.

Fig. 2 is a schematic structural view of the first folding state of the stroller of the present invention.

Fig. 3 is a schematic structural view of the second folding state of the stroller of the present invention.

Fig. 4 is a schematic structural view of the third folding state of the stroller of the present invention.

Detailed Description

As shown in fig. 1 and 4, the stroller comprises two symmetrically-arranged side brackets 1, each side bracket comprises a front leg 11, a rear leg 12, a front connecting rod 13, a rear connecting rod 14, a first connecting rod 15, a second connecting rod 16, a lower connecting rod 17 and a hand push rod 18, a front wheel 110 is mounted at the bottom of the front leg 11, and a rear wheel 120 is mounted at the bottom of the rear leg 12. In the unfolded state, the front leg 11 and the rear leg 12 are separated, and in the folded state, the front leg 11 and the rear leg 12 are drawn together and kept in an upright state.

As shown in FIG. 1, the top of the rear leg bar 12 has a T-shaped connecting member 121, and both ends of the T-shaped connecting member 121 are rotatably connected to the top of the front leg bar 11 and the bottom of the front link 13, respectively. A first connecting rod 15 and a second connecting rod 16 are arranged between the front foot rod 11 and the rear foot rod 12, one end of the first connecting rod 15 is rotatably connected with the rear foot rod 12, the other end of the first connecting rod 15 is rotatably connected with the second connecting rod 16, one end of the second connecting rod 16 is rotatably connected with the front foot rod 11, and the other end of the second connecting rod 16 is rotatably connected with the first connecting rod 15. The connecting point 19 between the first link 15 and the second link 16 has a dead point position, which is a position where the connecting point is located when the angle between the first link 15 and the second link 16 is 180 degrees, or a position where the extension length of the extension spring 2 is the maximum.

The top of the rear connecting rod 14 is rotatably connected with the front connecting rod 13, the bottom of the rear connecting rod is rotatably connected with the lower connecting rod 17, one end of the lower connecting rod 17 is rotatably connected with the rear foot rod 12, and the other end of the lower connecting rod 17 is rotatably connected with the rear connecting rod 14. In the present embodiment, the front link 13, the rear leg bar 12, the lower link 17 and the rear link 14 form a first four-bar linkage, the front leg bar 11, the rear leg bar 12, the first link 15 and the second link 16 form a second four-bar linkage, and in order to realize the linkage folding of the two four-bar linkages, the first link 15 and the lower link 17 are integrally provided in the present embodiment. When the first four-bar linkage is folded, the second four-bar linkage is folded accordingly.

Of course, the linkage between the two four-bar linkages can be realized by other methods, such as the structure disclosed in CN207328552U, the stroller includes a linkage rod, one end of the linkage rod is connected to the front bar, and the other end of the linkage rod is connected to the connection point 19.

The utility model discloses an improvement lies in being provided with extension spring 20 between preceding foot pole 11 and the back foot pole 12, and pivot 151 between first connecting rod 15 and the back foot pole 12 is connected to extension spring 20 one end, and second connecting rod 16 and pivot 161 between preceding foot pole 11 are connected to the other end, and the position of certainly connecting can take place the transform, so set up need not to set up the pin of connecting the extension spring again on the foot pole in addition.

During the folding process, the front foot bar 11 and the rear foot bar 12 are firstly opened, the tension spring 20 is extended, and after the connecting point 19 passes through the dead point position, the tension spring 20 pulls the front foot bar 11 to rotate and draw close to the rear foot bar 12. Of course, folding can be achieved without setting a dead point position, but folding is too fast, and safety hazards are caused.

In order to maintain the frame in the unfolded state, one of the connection points of the first four-bar linkage is provided with a locking mechanism, and the locking mechanism can adopt a conventional structure, such as a locking mechanism formed by matching a bolt and a pin slot, wherein the bolt is connected with a release mechanism through a pull wire.

In order to simplify the folding operation, the top end of the front link 13 is provided with a push rod 18 rotatably connected thereto, and when the push rod 18 is rotatably folded toward the front link 13, the rotating joint tears the pull wire to unlock the locking mechanism, and the locking structure and the unlocking structure can refer to the unlocking mechanism of the stroller disclosed in CN106627714A, which will not be described in detail herein. In order to minimize the folded length of the stroller, the connection point of the front link 13 to the handle bar 18 coincides with the connection point of the front link 13 to the rear link 14.

Of course, a push rod may be provided on the top of the rear link 13, but this is not conducive to automatic folding of the stroller. Because the front connecting rod 13 is inclined, the unlocking mechanism can rotate to move close to the rear foot rod 12 by means of the gravity of the unlocking mechanism, so that the first four-bar linkage mechanism is folded, the connecting point 19 is driven to cross a dead point position in the folding process, the front foot rod 11 rotates to move close to the rear foot rod 12 by means of the pulling force of the spring 20, and finally the whole folding process is completed. If the hand bar is provided on the top of the rear link 14, the automatic folding of the cart is prevented instead because the direction of gravity is opposite to the folding direction of the rear link 14.

The working principle of the utility model is as follows:

as shown in fig. 1, in the unfolded state, the connection point 19 is located below the dead point position, and the tension spring 20 is stretched, but the front leg bar 11 cannot be drawn toward the rear leg bar 12 due to the locking mechanism provided at the connection point of the front link 13 and the rear leg bar 12.

As shown in fig. 2, when the rotary handle 18 is folded toward the front link 13, the joint unlocks the locking mechanism, the front link 13 is rotated toward the rear foot 12 by its own weight or external force, and since the lower link 17 and the first link 15 are integrally formed, the connection point 19 is driven to move upward, and the tension spring 20 is extended, that is, the tension spring 20 provides resistance to folding until the connection point 19 passes over the dead point position.

After the dead point is crossed, the front leg rod 11 will automatically draw close to the rear leg rod 12 due to the tension of the tension spring 20, and the cart is automatically folded. In the folded state, the connecting point of the lower link 17 and the rear link 14 is close to the bottom of the rear leg 12, all the links are drawn toward the rear leg 12, and the front leg 11 and the rear leg 12 are kept in the upright state for easy transportation.

Claims (10)

1. The utility model provides an automatic folding children's shallow, includes the collateral branch frame that two symmetries set up, every collateral branch frame includes first four link mechanism and the four link mechanism of second of interlock folding, and first four link mechanism is including rotating preceding connecting rod, back foot bar, lower connecting rod and the back connecting rod of connecting in proper order, and four link mechanism of second is including rotating preceding foot bar, back foot bar, first connecting rod and the second connecting rod of connecting in proper order, its characterized in that, be provided with the extension spring between preceding foot bar and the back foot bar, tie point between first connecting rod and the second connecting rod has the dead point position, and during folding, preceding connecting rod rotates and draws close to the back foot bar, orders about the tie point crosses behind the dead point position, and preceding connecting rod rotates under the effort of extension spring and draws close to the back foot bar.

2. The stroller as recited in claim 1, wherein a push bar is pivotally connected to a top portion of said front link.

3. The stroller of claim 2, wherein the first four-bar linkage has a locking mechanism that is unlocked when the handle bar is folded toward the forward link.

4. The stroller as recited in claim 2, wherein the connection point between the handle bar and the front link coincides with the connection point between the rear link and the front link.

5. The stroller of claim 1, wherein the lower link and the first link are integrally formed.

6. The stroller of claim 5, wherein in the deployed state, a connection point between the first link and the second link is below a dead center position.

7. The stroller as recited in claim 1, further comprising a linkage, wherein one end of the linkage is pivotally connected to the front link and the other end of the linkage is pivotally connected to the first link or the second link.

8. The stroller of claim 1, wherein the tension spring is coupled at each end to the pivot between the second link and the front leg bar and the pivot between the first link and the rear leg bar.

9. The stroller as recited in claim 1, wherein said front and rear legs are upright when folded.

10. The stroller as recited in claim 1, wherein the connection point between the lower link and the rear link is proximate the bottom of the rear foot bar in the folded position.

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