CN103802877A - Foldable baby carriage - Google Patents

Abstract

The invention provides a foldable baby carriage which comprises a carriage frame, wherein the carriage frame comprises a hand push rod, a front foot tube, a rear foot tube, a front wheel, a rear wheel and a seat tube, and the end part of the hand push rod is respectively pivoted with one end part of each front foot tube and one end part of each rear foot tube through a pivoting seat fixed on the hand push rod. A sliding clamping mechanism is arranged between the end part of the hand push rod and the end part of the front foot tube, and the sliding clamping mechanism comprises a clamping piece for clamping with the pin joint seat, a cam interfering with the clamping piece and a driving piece for driving the cam. When the driving piece is driven, the cam rotates, so that the clamping piece is driven to slide and be separated from the pivoting seat. The foldable baby carriage is safe to lock and convenient to release, and meets the requirements of users.

Description

foldable stroller

technical field

The invention relates to a baby carriage, in particular to a foldable baby carriage with safe locking and convenient unlocking.

Background technique

With the widespread use of baby carriers, people have higher and higher functional requirements for baby carriers. It is not only hoped that the baby carrier can make the baby feel comfortable and safe when in use, but also hope that it can be beautiful, space-saving and convenient to store when not in use.

For example, existing strollers generally have a folding function. When not in use, the frame body can be folded up, and the push handle can also be bent downwards to support the stroller on the ground so that the stroller is standing. This saves space and facilitates storage. For this reason, the frame of the traditional stroller is provided with a plurality of pivoting mechanisms so that the entire frame can be folded up, but these pivoting mechanisms are large in number and complex in structure, which is very inconvenient for the user to operate, and these pivoting mechanisms are very inconvenient when the stroller is positioned. The positioning of the pivoting mechanism is not firm, and it is easy to automatically release the lock due to misoperation, thereby causing safety problems; in addition, when the stroller needs to be folded, the unlocking operation of these pivoting mechanisms is also complicated and inconvenient.

So there is an urgent need for a foldable stroller with safe locking and convenient release to overcome the above defects.

Contents of the invention

An object of the present invention is to provide a foldable stroller with safe locking and convenient unlocking.

In order to achieve the above object, the present invention provides a foldable stroller, comprising a vehicle frame, said vehicle frame comprising a hand push rod, a front leg tube, a rear leg tube, a front wheel, a rear wheel and a seat tube, said The end of the push rod is respectively pivotally connected to one end of the front leg tube and the rear leg tube through a pivot seat fixed thereon. A sliding engagement mechanism is provided between the end of the hand push rod and the end of the front leg tube, and the sliding engagement mechanism includes an engaging piece for engaging with the pivot seat, and A cam interfering with the engaging member and a driving member for driving the cam; when the driving member is driven, the cam rotates, thereby driving the engaging member to slide from the pivot joint Get out of the seat.

Compared with the prior art, the hand push rod, the front leg tube and the rear leg tube of the foldable stroller of the present invention realize the rotation of the connecting rod through the pivot seat. When the frame is folded, the connecting rod mechanism can make the frame The main parts are folded away. In addition, a sliding engagement mechanism is provided between the hand push rod and the front leg tube, through which the engaging piece of the sliding engaging mechanism engages with the pivot seat, and the cam and the engaging piece interfere with each other. When the driving piece is driven, The cam rotates, thereby driving the engaging part to slide and disengage from the pivotal seat, and then the stroller is folded. The interlocking locking method is realized by the interference fit of the cam and the engaging parts, the locking is reliable and safe, and the unlocking is convenient.

As a preferred embodiment, one end of the cam is pivotally connected to the inner wall of the front leg tube, the other end of the cam forms a free end, the cam surface of the free end interferes with the engaging member, and the The free end is connected with the driving member.

Preferably, the engaging member is provided with a receiving groove for receiving the free end of the cam, and the bottom surface of the receiving groove interferes with the cam surface of the free end.

As another preferred embodiment, a protruding portion is provided at the end of the engaging member, and a notch is provided at a position corresponding to the protruding portion in the pivotal seat to engage with the protruding portion.

Preferably, the driving member is connected to a certain place on the cam surface of the free end of the cam.

Preferably, the number of the driving member is one, one end of the driving member is connected to the cam surface of the cam on one side, and the other end of the driving member is connected to the cam surface of the cam on the other side , the driving member is arranged horizontally between the two front leg tubes, and is provided with an operation part for the user to operate.

Preferably, the driving member is a flexible rope or a flexible webbing.

As yet another preferred embodiment, the sliding engagement mechanism further includes a spring arranged along the sliding direction of the engaging member, one end of the spring is fixed in the front leg tube, and the other end of the spring abuts against the on the fastener.

As an optional embodiment, a dinner plate is further included, and the end of the dinner plate is rotatably connected to the seat tube through a pivot member.

Preferably, one end of the seat tube is pivotally connected to the pivot seat.

As another optional embodiment, a backrest rod is further included, the end of the backrest rod is pivotally connected to the seat tube, and a backrest adjustment support base is provided on the rear leg tube to support the backrest rod.

Preferably, the backrest adjustment support base is provided with a plurality of grooves at different positions, and a support block is fixedly connected to the backrest rod to engage with the grooves.

Preferably, the backrest adjustment support seat has an opening, and when the backrest rod is folded, the support block is separated from the backrest adjustment support seat through the opening.

As yet another preferred embodiment, it further includes an upright support that is pivotally connected to the vehicle frame, and when the vehicle frame is folded upright, the upright support is supported on the ground.

Preferably, the upright support has a support end, and a pulley is provided on the support end.

Preferably, there is a pair of front leg tubes and a pair of rear leg tubes, a pedal is provided between the front leg tubes, a connecting rod is provided between the rear leg tubes, and the upright support spans ground between the pedal and the connecting rod.

Preferably, the upright support has a first part and a second part pivotally connected, and when the stroller is folded or unfolded, the first part and the second part are opposite to each other. pivot.

Description of drawings

Fig. 1 is a perspective view of an embodiment of the foldable stroller of the present invention.

Fig. 2 is a side view of the foldable stroller shown in Fig. 1 .

Fig. 3a is a partially exploded view of the foldable stroller shown in Fig. 1, showing the sliding engagement mechanism.

Fig. 3b is an exploded view of the sliding engagement mechanism and the pivotal seat in Fig. 3a.

Fig. 3c is an exploded view of the sliding engaging mechanism of Fig. 3a.

Fig. 4a is a schematic diagram of the front leg tube and the push rod of the foldable stroller shown in Fig. 1 when the sliding engagement mechanism is locked.

Fig. 4b is a schematic diagram of the front leg tube and the push rod shown in Fig. 4a when the sliding engagement mechanism is released.

Fig. 5 is a partially enlarged view of the foldable stroller shown in Fig. 1, which shows the connection relationship between the dining plate and the seat tube.

Fig. 6 is a partial view of the backrest bar and the rear leg tube of the foldable stroller shown in Fig. 1 when the stroller is unfolded, which shows the engaged state of the backrest bar and the rear leg tube.

Fig. 7 is a diagram of a folded state of the foldable stroller shown in Fig. 1 .

Detailed ways

Several different preferred embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like reference numerals in different drawings represent like parts. Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1-2, the essence of the present invention is to provide a foldable stroller 1, which includes a frame 10 and various fabrics (omitted in the figure) arranged on the frame, the general frame of the frame 10 It consists of a hand push rod 101, a pair of front leg tubes 102, a pair of rear leg tubes 103, a pair of front wheels 104, a pair of rear wheels 105 and a seat tube 106. The two ends of the hand push rod 101 are respectively pivotally connected with one end of each front leg tube 102 and each rear leg tube 103 and one end of the seat tube 106 through a pivot seat 110 fixed thereon. A sliding engagement mechanism 200 (please refer to FIG. 3 a ) is provided between each end of each front leg tube 102 . The sliding engagement mechanism 200 includes an engaging member 210 engaged with the pivot seat 110 , The cam 220 interfering with the engaging part 210 and the driving part 230 for driving the cam 220 . When the driving member 230 is driven, the cam 220 rotates, thereby driving the engaging member 210 to slide and disengage from the pivot seat 110 , and then the stroller 1 is folded. The interlocking locking method is realized by the interference fit between the cam 220 and the engaging member 210, the locking is reliable and safe, and the unlocking is convenient.

The sliding engagement mechanism 200 of the foldable stroller 1 of the present invention will be described in detail below with reference to FIGS. 3a-3c, 4a-4b. The sliding engagement mechanism 200 is disposed in the front leg tube 102 and connected to the front leg tube 102 , specifically, a mounting plate 1021 for installing the sliding engagement mechanism 200 is provided on the inner wall of the front leg tube 102 . As mentioned above, the sliding engagement mechanism 200 includes an engaging member 210 engaged with the pivot seat 110 fixed on the hand push rod 101, a cam 220 interfering with the engaging member 210, and a cam 220 for driving. The driver 230 (please refer to FIG. 1). Specifically, the end of the engaging member 210 is provided with a protruding portion 211, and the pivot seat 110 is provided with a notch 111 at a position corresponding to the protruding portion 211 to engage with the protruding portion 211, so that the front leg tube 102 and the hand Locking between push rods 101. Preferably, the cam 220 is roughly half-moon-shaped, one end of which is pivotally connected to the mounting plate 1021 of the inner wall of the front leg tube 102 through a rotating pin 1022 or other connectors, and the other end forms a free end, and the cam surface of the free end engages with Part 210 interferes with each other, and the free end is connected to the driving part 230. Preferably, a certain place on the cam surface of the free end is connected to the driving part. This arrangement makes the free end of the cam 220 rotate around when the driving part is driven. Pin 1022 rotates. Preferably, the engaging member 210 is substantially in the shape of a rectangular frame, and a receiving groove 212 for receiving the free end of the cam 220 is disposed thereon. The receiving groove 212 passes through left and right for the cam 220 to pass through the receiving groove 212 transversely, so that the bottom surface of the receiving groove 212 interferes with the cam surface of the free end of the cam 220 .

Preferably, the driving member 230 is a flexible rope or a flexible webbing. Optionally, the number of the driving member 230 is one or two. In the case of one driving member 230 (as shown in FIG. 1 ), that is, one rope is used to control the sliding engaging mechanism 200 on both sides of the vehicle frame 10 . Specifically, one end of the rope is connected to the cam surface of the cam 220 on one side, and the other end is connected to the cam surface of the cam 220 on the other side, while the middle part of the rope is horizontally laid between the two front leg tubes 102 and provided for the user to use. An operating section for the operation, for example, is provided above the seat for easy operation. When the operator pulls the operating part upwards, the two ends of the rope drive the free end of the cam 220 to rotate downwards. Since the cam surface at the free end of the cam 220 is in conflict with the engaging member 210, the engaging member 210 will rotate when the cam 220 rotates. Sliding downward under the action, so that the protruding part 211 of the engaging part 210 disengages from the notch 111 of the pivot seat 110 . When there are two driving parts, two ropes are used to control the sliding engagement mechanism 200 on both sides respectively, one end of each rope is connected with its corresponding cam surface, and the other end of each driving part is an operation for the user to operate. end.

As a preferred embodiment, in order to enable the engaging member 210 to automatically reset, the sliding engaging mechanism 200 further includes a spring 240 arranged along the sliding direction of the engaging member 210, one end of the spring 240 is fixed in the front leg tube 102, The other end of the spring 240 is against the engaging member 210 . Specifically, the engaging member 210 is provided with a vertically penetrating passage below the receiving groove 212 for accommodating the spring 240 .

As shown in FIG. 5 , the seat tube 106 of the foldable stroller 1 is pivotally connected to the front leg tube 102 through a pivot device 120 . Preferably, the foldable stroller 1 also includes a dinner tray 107, the end of the dinner tray 107 is connected to the bracket 121 on the end of the seat tube 106, and is pivotally connected between the bracket 121 and the dinner tray 107. The pivot member 122 between them is rotatably connected with the seat tube 106 . When the seat pipe 106 is folded along with the vehicle frame 10, the dinner plate 107 is also folded thereupon.

As a preferred embodiment, as shown in FIG. 6 , the foldable stroller 1 further includes a backrest bar 108 , the end of the backrest bar 108 is pivotally connected to the seat tube 106 so that it can be folded as the seat tube 106 is folded. Preferably, the rear leg tube 103 of the foldable stroller 1 is provided with a backrest adjusting support seat 130 to support the backrest bar 108 . Specifically, the backrest adjustment support base 130 is provided with a plurality of grooves 131 at different positions and openings 132 communicating with the grooves 131 , and a support block 1081 is fixedly connected to the backrest bar 108 to correspond to one of the grooves 131 . When the backrest rod 108 is folded, the support block 1081 is disengaged from the groove 131 from the opening 132 to disengage from the backrest adjustment support seat 130 .

Please refer to Figures 1, 2 and 7, in order to make the foldable stroller 1 stand upright on the ground after being folded, the foldable stroller 1 is also provided with an upright support 109 pivotally connected to the frame 10, The upright support 109 is disposed across between the pedal 102a and the rear wheel link 105a, and the upright support 109 includes a first portion 109a and a second portion 109b that are pivotally connected. When the stroller 1 is folded or unfolded, the first part 109a and the second part 109b pivot relative to each other. When the foldable stroller 1 stands upright on the ground when it is folded, the support end of the first part 109a of the upright support member 109 is supported on the ground to form a support point, thereby forming a triangular stable support with the front wheel 104 and the rear wheel 105 structure. It should be noted that the upright supporting member 109 can be installed on other connecting rods of the vehicle frame 10 and is not limited to this embodiment.

Preferably, for the convenience of transportation, pulleys can be provided on the support end of the upright support 109a.

Optionally, the upright support 109 may be made of injection molded plastic, metal tubing or a combination of materials.

The push rod 101, the front leg tube 102, the rear leg tube 103 and the seat tube 106 of the collapsible stroller 1 of the present invention realize the four-link rotation through the pivot seat 110. When the vehicle frame 10 is folded, the four-link mechanism Then the main components of the vehicle frame 10 can be folded. In addition, a sliding engagement mechanism 200 is provided between the hand push rod 101 and the front leg tube 102, through which the engaging member 210 of the sliding engaging mechanism 200 engages with the pivot seat 110, and the cam 220 interferes with the engaging member 210. . When the driving member 230 drives the cam 220 , the cam 220 rotates, thereby driving the engaging member 210 to slide and disengage from the pivot seat 110 , and then the stroller 1 is folded. The interlocking locking method is realized by the interference fit between the cam 220 and the engaging member 210, the locking is reliable and safe, and the unlocking is convenient.

The above disclosures are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the patent scope of the present invention still fall within the scope of the present invention.

Claims (17)

1. a Foldable pushchair, comprise vehicle frame, described vehicle frame comprises a handspike, a front foot pipe, a rear foot tube and a seat tubes, the end of described handspike by the pivot connecting seat that is fixed thereon respectively with an end pivot joint of described front foot pipe and described rear foot tube, it is characterized in that: between the end of described handspike and the end of described front foot pipe, be provided with the mechanism that is slidably fastened, described in be slidably fastened mechanism comprise an engagement piece in order to fasten with described pivot connecting seat, with a cam of described engagement piece interference and for driving an actuator of described cam;

When driving when described actuator, described cam rotates, thereby drives described engagement piece to slide and depart from from described pivot connecting seat.

2. Foldable pushchair as claimed in claim 1, it is characterized in that: one end of described cam is articulated in the inwall of described front foot pipe, the other end of described cam forms a free end, described free-ended cam face and described engagement piece interference, and described free end is connected with described actuator.

3. Foldable pushchair as claimed in claim 2, is characterized in that: described engagement piece is provided with to accommodate a free-ended accepting groove of described cam, the basal surface of described accepting groove and described free-ended cam face interference.

4. Foldable pushchair as claimed in claim 1, is characterized in that: the end of described engagement piece is provided with a protrusion, and described pivot connecting seat offers a recess in the position of the described protrusion of correspondence, to fasten with described protrusion.

5. Foldable pushchair as claimed in claim 2, is characterized in that: certain on the free-ended cam face of described actuator and described cam is connected.

6. Foldable pushchair as claimed in claim 5, it is characterized in that: the quantity of described actuator is one, one end of described actuator is connected with the cam face of the described cam of a side, the other end of described actuator is connected with the cam face of the described cam of opposite side, described actuator cross at two described between front foot pipe, and be provided with the operating portion for user's operation.

7. Foldable pushchair as claimed in claim 1, is characterized in that: described actuator is a flexible rope or a flexible braid belt.

8. Foldable pushchair as claimed in claim 1, it is characterized in that: described in the mechanism that is slidably fastened also comprise the spring arranging along the direction of slip of described engagement piece, one end of described spring is fixed in described front foot pipe, and the other end of described spring is resisted against on described engagement piece.

9. Foldable pushchair as claimed in claim 1, is characterized in that: also comprise a service plate, described service plate is rotationally connected by an articulated part and described seat tubes.

10. Foldable pushchair as claimed in claim 1, is characterized in that: an end of described seat tubes and described pivot connecting seat pivot joint.

11. Foldable pushchairs as claimed in claim 1, is characterized in that: also comprise back support bar, and the end of described back support bar and described seat tubes pivot joint, described rear foot tube is provided with a backrest and adjusts supporting seat to support described back support bar.

12. Foldable pushchairs as claimed in claim 11, is characterized in that: described backrest adjustment supporting seat is provided with the groove of multiple diverse locations, is fixedly connected with a back-up block to fasten with described groove in described back support bar.

Foldable pushchair described in 13., is characterized in that: described backrest is adjusted supporting seat and had a perforate, and in the time of described back support bar folding, described back-up block departs from described backrest from described perforate and adjusts supporting seat.

14. Foldable pushchairs as claimed in claim 1, is characterized in that: also comprise the upright support being articulated with described vehicle frame, in the time that described vehicle frame folding is vertical, described upright support is supported in ground.

15. Foldable pushchairs as claimed in claim 14, is characterized in that: described upright support has a support end, and described support end is provided with a pulley.

16. Foldable pushchairs as claimed in claim 14, it is characterized in that: there is a pair of described front foot pipe and a pair of described rear foot tube, between described front foot pipe, be provided with a stretcher, between a described rear foot tube, be provided with a connecting rod, described upright support is arranged between described stretcher and described connecting rod across ground.

17. Foldable pushchairs as claimed in claim 16, is characterized in that: described upright support has the first part and the Part II that are articulated, and in the time folding or launch described perambulator, described first part and a described Part II are pivoted relative to each other.

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