Cart

Abstract

The embodiment of the present application discloses a cart. The cart includes a front leg frame, an armrest frame, a rear leg frame and a clamping structure, and the clamping structure includes a first clamping member and a second clamping member for use together, the first clamping member is connected to one of the front leg frame, the rear leg frame and the armrest frame, and the second clamping member is connected to the other of the front leg frame, the rear leg frame and the armrest frame, and after the front leg frame, the rear leg frame and the armrest frame are folded together, the first clamping member can be clamped and connected with the second clamping member. The present application realizes the fixation of the cart after folding through the clamping connection mode of the first clamping member and the second clamping member, and the connection mode is simple, easy to operate, and convenient for the rapid fixation of the cart after folding. The clamping connection mode is a detachable connection, and the connection between the first clamping member and the second clamping member can be released when the cart needs to be unfolded, and the first clamping member can be connected to the second clamping member when the cart needs to be folded and fixed, so that the clamping structure does not affect the folding and unfolding of the cart.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a cart. Background Art

[0002] In the related art, in order to facilitate the transportation or storage of the cart, the cart is generally foldable, so that the cart becomes smaller after folding, occupies less space, and is easier to carry. However, in the related art, after the cart is folded, it will unfold again if it is hit, which brings inconvenience to the user. Summary of the invention

[0003] The present application provides a stroller for solving the problem in the related art that after being folded, the stroller will unfold again if it is hit, causing inconvenience to the user.

[0004] The present application provides a cart, comprising:

[0005] Front leg rack;

[0006] An armrest frame, hinged to the front leg frame;

[0007] A rear leg frame, hinged to the front leg frame, the armrest frame, or the hinge between the front leg frame and the armrest frame;

[0008] A front wheel connected to an end of the front leg frame away from the armrest frame;

[0009] A rear wheel connected to an end of the rear leg frame away from the armrest frame;

[0010] The clamping structure includes a first clamping part and a second clamping part used in combination, the first clamping part is connected to one of the front leg frame, the rear leg frame and the armrest frame, and the second clamping part is connected to the other of the front leg frame, the rear leg frame and the armrest frame. After the front leg frame, the rear leg frame and the armrest frame are folded together, the first clamping part can be clamped and connected with the second clamping part.

[0011] The stroller of the present application is fixed after being folded by means of a snap connection between the first snap member and the second snap member. The connection method is simple and easy to operate, and is convenient for quick fixation of the stroller after being folded. The snap connection method is a detachable connection. When the stroller needs to be unfolded, the connection between the first snap member and the second snap member can be released. When the stroller needs to be folded and fixed, the first snap member and the second snap member can be connected, so that the snap structure does not affect the folding and unfolding of the stroller.

[0012] In some embodiments, the first engaging member is provided with a slot, and the second engaging member is provided with a protrusion, and the protrusion can be engaged in the slot.

[0013] Based on the above embodiment: the cart is fixed after being folded by connecting the card slot and the card protrusion. The connection method is simple and the production is convenient, which is conducive to reducing production costs.

[0014] In some embodiments, the first engaging member has a guide surface, and the guide surface and the slot are arranged on the same side of the first engaging member. From an end close to the slot to an end away from the slot, the guide surface extends from a notch close to the slot toward a direction close to the bottom wall of the slot, and the second engaging member can slide over the guide surface and then be engaged in the slot.

[0015] Based on the above embodiment: when the first engaging member is connected to the second engaging member, the engaging protrusion will move from the end of the guide surface away from the slot to the end of the guide surface close to the slot and then enter the slot. Therefore, the guide surface is designed to extend from the end close to the slot to the end away from the slot, and the guide surface extends from the notch close to the slot toward the bottom wall close to the slot. In the process of the engaging protrusion entering the slot, the distance between the engaging protrusion and the guide surface changes from large to small, which is conducive to the smooth entry of the engaging protrusion into the slot.

[0016] In some embodiments, the first engaging member comprises:

[0017] A first connecting portion, connecting one of the front leg frame, the rear leg frame and the armrest frame;

[0018] The first engaging portion is connected to the first connecting portion and protrudes from the front leg frame, the rear leg frame and the armrest frame, and the first engaging portion is provided with the engaging groove.

[0019] Based on the above embodiment: the card slot is set on the first card slot protruding from the front leg frame, the rear leg frame and the armrest frame, so that the card protrusion is less hindered by the front leg frame, the rear leg frame and the armrest frame when connecting with the card slot, which is conducive to the smooth connection between the card protrusion and the card slot.

[0020] In some embodiments, the first engaging portion is provided with the engaging groove on a side close to the first connecting portion, and the first engaging portion is provided with the guiding surface on a side away from the first connecting portion.

[0021] Based on the above embodiment: it is convenient for the latching protrusion to pass through the guide surface via the side of the latching slot away from the first connecting portion and then be latched into the latching slot.

[0022] In some embodiments, the rear leg frame is hinged to the armrest frame, the rear leg frame is provided with the first engaging member, and the armrest frame is provided with the second engaging member.

[0023] Based on the above embodiment: hingedly connecting the rear leg frame to the armrest frame, compared with hingedly connecting the rear leg frame to the hinge of the front leg frame and the armrest frame, the hinge of the rear leg frame and the armrest frame can be made independent of the hinge of the front leg frame and the armrest frame, which is convenient for assembling the cart.

[0024] In some embodiments, the latch includes a first end plate facing away from the handrail frame, and a side plate connected between the first end plate and the handrail frame. When the latch is inserted into the slot, the first end plate abuts against the bottom wall of the slot, and the side plate abuts against the side wall of the slot.

[0025] Based on the above embodiment: the clamping protrusion is configured to include a first end plate and a side plate, so that a lightweight configuration of the clamping protrusion can be achieved.

[0026] In some embodiments, the clamping protrusion also includes a flange arranged around the periphery of the side panel, and the flange connects the side panel and the armrest.

[0027] Based on the above embodiment: by providing the convex edge, the connection area between the clamping protrusion and the handrail frame can be increased, and the connection reliability between the clamping protrusion and the handrail frame can be improved.

[0028] In some embodiments, the first engaging member is rotatably connected to the rear leg frame.

[0029] Based on the above embodiments: after the cart is folded, the first engaging member can be controlled to rotate manually or electrically to achieve the engaging connection between the engaging protrusion and the engaging slot; and before the cart is unfolded, the first engaging member can be controlled to rotate manually or electrically to release the connection between the engaging protrusion and the engaging slot, so that the cart will not be hindered by the engaging protrusion and the engaging slot when folding or unfolding, which is conducive to the rapid folding and unfolding of the cart.

[0030] In some embodiments, it also includes:

[0031] A linkage rod, wherein the linkage rod is hinged to the front leg frame and the rear leg frame, the first engaging member is arranged at the hinge between the rear leg frame and the linkage rod, and the first engaging member is connected to the linkage rod and can rotate with the linkage rod.

[0032] Based on the above embodiment: since the linkage rod hinged between the front leg frame and the rear leg frame will also rotate when the front leg frame and the rear leg frame rotate relative to each other to fold the cart, the first engaging member is designed to rotate with the rotation of the linkage rod. It can be achieved that: after the cart is folded into place, the first engaging member just rotates to the second engaging member and completes the engaging connection with the second engaging member, and the first engaging member gradually disengages from the connection with the second engaging member during the unfolding of the cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 is a three-dimensional diagram of the first cart provided by an embodiment of the present application when unfolded;

[0035] Figure 2 yes Figure 1 A perspective view of the stroller is shown when folded;

[0036] Figure 3 yes Figure 1 A perspective view of a first engaging member in the cart is shown;

[0037] Figure 4 yes Figure 1 A perspective view of a second engaging member and a portion of an armrest frame in the cart is shown;

[0038] Figure 5 yes Figure 1 A cross-sectional view of a first engaging member and a second engaging member in the cart is shown;

[0039] Figure 6 yes Figure 1 A partial exploded view of the cart is shown;

[0040] Figure 7 yes Figure 1 An exploded view of the locking member, mounting seat and other structures in the cart is shown;

[0041] Figure 8 yes Figure 1 A perspective view of a portion of a locking member and a mounting seat in a cart is shown;

[0042] Fig. 9 yes Figure 8 A magnified view of the structure at center A;

[0043] Fig.10 yes Figure 1 A perspective view of the locking member of the cart and the first seat body of the mounting seat is shown;

[0044] Fig.11 is a three-dimensional diagram of the second cart provided by an embodiment of the present application when unfolded;

[0045] Fig.12 is a three-dimensional diagram of a third cart provided by an embodiment of the present application when unfolded;

[0046] Fig.13 yes Fig.12 A perspective view of the stroller is shown when folded. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0049] The embodiment of the present application provides a stroller 100. The stroller 100 may be a baby stroller, a supermarket stroller, etc., and the following description will be given by taking a baby stroller as an example.

[0050] See also Figure 1 The cart 100 may include a front leg frame 110, a rear leg frame 120 and an armrest frame 130. To facilitate storage and transportation of the cart 100, at least two of the front leg frame 110, the rear leg frame 120 and the armrest frame 130 may be hinged so that the cart 100 can be folded up when idle to reduce the occupied space. Preferably, any one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130 may be hinged to another one so that the front leg frame 110, the rear leg frame 120 and the armrest frame 130 can be folded with each other when idle, thereby realizing the miniaturization of the cart 100 after folding, which is more convenient for storage, transportation, etc.

[0051] Optionally, the front leg frame 110 can be hinged to the armrest frame 130, and the rear leg frame 120 can be hinged to the front leg frame 110, the armrest frame 130, or the hinge between the front leg frame 110 and the armrest frame 130, so that the structural design of the cart 100 is diversified and can meet the use needs of more users. Preferably, both the front leg frame 110 and the rear leg frame 120 can be hinged to the armrest frame 130, and the front leg frame 110 and the rear leg frame 120 can be hinged to different parts of the armrest frame 130; in this way, the folding of the front leg frame 110 and the armrest frame 130, and the folding of the rear leg frame 120 and the armrest frame 130 are independent of each other, and the unfolding of the front leg frame 110 and the armrest frame 130, and the unfolding of the rear leg frame 120 and the armrest frame 130 are independent of each other, which can ensure the smooth folding or unfolding of the cart 100.

[0052] Specifically, in an exemplary solution, the armrest 130 may include a handheld end 131, a connecting end 132 disposed opposite to the handheld end 131, and a middle section 133 connected between the handheld end 131 and the connecting end 132, the front leg frame 110 may be hinged to the connecting end 132, and the rear leg frame 120 may be hinged to the middle section 133. The front leg frame 110 is designed to be hinged to the connecting end 132 of the armrest 130, so that after the cart 100 is unfolded, the front leg frame 110 can be unfolded to be roughly in the same plane as the armrest 130, so that the cart 100 can be unfolded to a greater extent and the structural stability of the cart 100 when unfolded is improved. By hingedly connecting the middle section 133 of the rear leg frame 120 and the armrest frame 130 , the unfolding or folding of the rear leg frame 120 and the armrest frame 130 , and the unfolding or folding of the front leg frame 110 and the armrest frame 130 can be made independent of each other, which is beneficial to the smooth unfolding or folding of the armrest frame 130 .

[0053] It should be noted that, since the stroller 100 needs to satisfy the effects of being able to accommodate infants or to place items, after the stroller 100 is unfolded, a sufficient accommodation area needs to be reserved between the front leg frame 110, the rear leg frame 120 and the armrest frame 130. To this end, in an exemplary solution, the front leg frame 110 can be roughly U-shaped, the rear leg frame 120 can be roughly U-shaped, the armrest frame 130 can be roughly U-shaped, and the opening side of the front leg frame 110 can be arranged opposite to and hinged to the opening side of the armrest frame 130. The opening side of the rear leg frame 120 can be arranged corresponding to and hinged to the middle section 133 of the armrest frame 130. In this way, a accommodating area can be defined in the stroller 100 formed by the front leg frame 110, the armrest frame 130, and the rear leg frame 120, so that components such as seats for infants to sit on can be placed in the accommodating area.

[0054] Specifically, the front leg frame 110 may include a first front leg 111, a second front leg 112 spaced apart from the first front leg 111, and a first connecting rod 113 located on the same side of the first front leg 111 and the second front leg 112 and connected to one end of the first front leg 111 and one end of the second front leg 112. The handrail frame 130 may include a first support rod 134, a second support rod 135 spaced apart from the first support rod 134, and a hand-held rod 136 located on the same side of the first support rod 134 and the second support rod 135 and connected to one end of the first support rod 134 and one end of the second support rod 135. The rear leg frame 120 may include a first rear leg 121, a second rear leg 122 spaced apart from the first rear leg 121, and a second connecting rod 123 located on the same side of the first rear leg 121 and the second rear leg 122 and connected to one end of the first rear leg 121 and one end of the second rear leg 122.

[0055] The ends of the first support rod 134 and the second support rod 135 connected to the hand-held rod 136 are the hand-held ends 131, the ends of the first support rod 134 and the second support rod 135 away from the hand-held rod 136 are the connecting ends 132, and the portions of the first support rod 134 and the second support rod 135 located between the hand-held ends 131 and the connecting ends 132 are the middle sections 133. The end of the first front leg 111 away from the first connecting rod 113 can be hinged to the connecting end 132 of the first support rod 134, and the end of the second front leg 112 away from the first connecting rod 113 can be hinged to the connecting end 132 of the second support rod 135. The end of the first rear leg 121 away from the second connecting rod 123 can be hinged to the middle section 133 of the first support rod 134, and the end of the second rear leg 122 away from the second connecting rod 123 can be hinged to the middle section 133 of the second support rod 135.

[0056] Optionally, the first front leg 111, the second front leg 112 and the first connecting rod 113 may be an integrated structure to improve the structural strength of the front leg frame 110. The two ends of the first connecting rod 113 may be connected to a front wheel 140 respectively. For example, the two ends of each first connecting rod 113 may be connected to a front wheel 140 through a first connecting column 114. Optionally, the first rear leg 121, the second rear leg 122 and the second connecting rod 123 may be an integrated structure to improve the structural strength of the rear leg frame 120. The two ends of the second connecting rod 123 may be connected to a rear wheel 150 respectively. For example, the two ends of each second connecting rod 123 may be connected to a rear wheel 150 through a second connecting column 124. One of the second connecting columns 124 may be integrally formed with the first rear leg 121, and the other second connecting column 124 may be integrally formed with the second rear leg 122. The distance between the two opposite end surfaces of the two front wheels 140 can be smaller than the distance between the two opposite end surfaces of the two rear wheels 150, so that after the cart 100 is folded, the two front wheels 140 on the front leg frame 110 can be stored between the two rear wheels 150 of the rear leg frame 120.

[0057] Optionally, the first support rod 134, the second support rod 135 and the hand-held rod 136 can be an integrated structure to improve the structural strength of the armrest 130. The hand-held rod 136, the side of the first support rod 134 close to the hand-held rod 136, and the side of the second support rod 135 close to the hand-held rod 136 can be provided with an anti-slip pad. The anti-slip pad can be made of elastic material to improve the user's feel. The first support rod 134 and the second support rod 135 can be retractable rods. The first support rod 134 and the second support rod 135 are designed as retractable rods, so that the length of the armrest 130 is adjustable. In this way, when using the cart 100, the user can adjust the armrest 130 to a corresponding length according to factors such as his or her own preferences, thereby improving the user's experience.

[0058] In order to maintain the folded state of the cart 100 after being folded, the cart 100 may further include a snap-fit ​​structure 160. In an exemplary solution, the snap-fit ​​structure 160 may include a first snap-fit ​​member 161 and a second snap-fit ​​member 162 used in conjunction with each other. The first snap-fit ​​member 161 may be connected to one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130, and the second snap-fit ​​member 162 may be connected to another one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130. Figure 2 After the front leg frame 110, the rear leg frame 120 and the armrest frame 130 are folded together, the first engaging member 161 can be engaged with the second engaging member 162. The engaging connection between the first engaging member 161 and the second engaging member 162 is simple and easy to operate, and is convenient for fast fixation of the cart 100 after folding; and the engaging connection is a detachable connection, and the connection between the first engaging member 161 and the second engaging member 162 can be released when the cart 100 needs to be unfolded, and the first engaging member 161 and the second engaging member 162 can be connected when the cart 100 needs to be folded and fixed, so that the engaging structure 160 does not affect the folding and unfolding of the cart 100.

[0059] It should be noted that the first engaging member 161 is connected to one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130, and the second engaging member 162 is connected to the other of the front leg frame 110, the rear leg frame 120 and the armrest frame 130, including the following six situations: the first engaging member 161 is connected to the front leg frame 110, the second engaging member 162 is connected to the rear leg frame 120; the first engaging member 161 is connected to the front leg frame 110, the second engaging member 162 is connected to the rear leg frame 120; The first engaging member 161 is connected to the rear leg frame 120, and the second engaging member 162 is connected to the front leg frame 110; the first engaging member 161 is connected to the rear leg frame 120, and the second engaging member 162 is connected to the armrest frame 130; the first engaging member 161 is connected to the armrest frame 130, and the second engaging member 162 is connected to the front leg frame 110; the first engaging member 161 is connected to the armrest frame 130, and the second engaging member 162 is connected to the rear leg frame 120. The connection mode of the first engaging member 161 and the second engaging member 162 is diverse and can be flexibly adjusted according to specific use requirements. Preferably, when the rear leg frame 120 is hinged to the armrest frame 130, the first engaging member 161 can be provided on the rear leg frame 120, and the second engaging member 162 can be provided on the armrest frame 130.

[0060] Optionally, see Figure 4 and Figure 5, the first engaging member 161 may be provided with a slot 1611, and the second engaging member 162 may be provided with a protrusion 1621, and the protrusion 1621 may be locked in the slot 1611. It should be noted that the number of the slots 1611 on the first engaging member 161 may be one or more, and the number of the protrusions 1621 on the second engaging member 162 may be equal to the number of the slots 1611 on the first engaging member 161, so that each protrusion 1621 may be correspondingly locked in one slot 1611. In order to simplify the structural design of the first engaging member 161, the number of the slots 1611 on the first engaging member 161 may preferably be one. It should be noted that the first engaging member 161 may be provided with both a slot 1611 and a protrusion. When both a slot 1611 and a protrusion are provided on the first engaging member 161, the second engaging member 162 may be provided with a protrusion 1621 used in conjunction with the slot 1611 on the first engaging member 161, and a slot used in conjunction with the protrusion on the first engaging member 161. The embodiment of the present application does not limit the structure of the first engaging member 161 and the second engaging member 162.

[0061] When the first engaging member 161 is provided with a slot 1611 and the second engaging member 162 is provided with a protrusion 1621, in order to facilitate the connection between the protrusion 1621 and the slot 1611, the first engaging member 161 may further have a guide surface 1612, and the guide surface 1612 and the slot 1611 may be provided on the same side of the first engaging member 161, so that the protrusion 1621 may be provided in the slot 1611 after passing through the guide surface 1612. For example, in the process of the protrusion 1621 entering the slot 1611, the distance between the protrusion 1621 and the guide surface 1612 may be gradually increased, so as to facilitate the protrusion 1621 to enter the slot 1611 through the guide surface 1612.

[0062] Optionally, see Figure 5 , from an end close to the slot 1611 to an end away from the slot 1611 , the guide surface 1612 may extend from a notch close to the slot 1611 toward a direction of a bottom wall 1615 close to the slot 1611 . When the first engaging member 161 is connected to the second engaging member 162, the engaging protrusion 1621 will move from the end of the guide surface 1612 away from the slot 1611 to the end of the guide surface 1612 close to the slot 1611 and then enter the slot 1611. Therefore, the guide surface 1612 is designed to extend from the end close to the slot 1611 to the end away from the slot 1611, and the guide surface 1612 extends from the notch close to the slot 1611 toward the bottom wall 1615 close to the slot 1611. In this way, during the process of the engaging protrusion 1621 entering the slot 1611, the distance between the engaging protrusion 1621 and the guide surface 1612 changes from large to small, which is conducive to the smooth entry of the engaging protrusion 1621 into the slot 1611.

[0063] In an exemplary solution, the guide surface 1612 may be arranged around the periphery of the card slot 1611. The guide surface 1612 is arranged around the periphery of the card slot 1611 so that the card protrusion 1621 can enter the card slot 1611 in multiple directions after being guided by the guide surface 1612, thereby increasing the flexibility of the connection between the card protrusion 1621 and the card slot 1611. In another exemplary solution, the guide surface 1612 may also be arranged corresponding to a local area outside the card slot 1611 to reduce the layout area of ​​the guide surface 1612, reduce the design difficulty of the first engaging member 161, and reduce the manufacturing cost. Among them, the arrangement of the guide surface 1612 corresponding to the local area of ​​the card slot 1611 can be understood as: the card slot 1611 has a notch edge, and the guide surface 1612 may be arranged only corresponding to a portion of the notch edge.

[0064] The first engaging member 161 may include a first connecting portion 1613 and a first engaging portion 1614. The first connecting portion 1613 may be connected to one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130, the first engaging portion 1614 may be connected to the first connecting portion 1613 and protrude from the front leg frame 110, the rear leg frame 120 and the armrest frame 130, and the first engaging portion 1614 may be provided with a card slot 1611. The card slot 1611 is provided on the first engaging portion 1614 protruding from the front leg frame 110, the rear leg frame 120 and the armrest frame 130, so that the card protrusion 1621 is less obstructed by the front leg frame 110, the rear leg frame 120 and the armrest frame 130 when connected with the card slot 1611, which is conducive to the smooth connection of the card protrusion 1621 with the card slot 1611.

[0065] Optionally, the first connection portion 1613 and the first engaging portion 1614 may be an integrated structure to enhance the structural strength of the first engaging member 161 and save assembly procedures. For example, the first engaging member 161 may be substantially in the shape of a long strip, and the opposite ends of the first engaging member 161 may be defined as the first connection portion 1613 and the first engaging portion 1614, respectively.

[0066] When the first engaging member 161 includes a first connecting portion 1613 and a first engaging portion 1614, in an exemplary embodiment, the setting of the guide surface 1612 corresponding to the local area outside the slot 1611 can be as follows: the guide surface 1612 and the slot 1611 can both be set on the first engaging portion 1614, and the guide surface 1612 can be set corresponding to the area of ​​the slot 1611 away from the first connecting portion 1613, so that the engaging protrusion 1621 passes through the guide surface 1612 from the side of the slot 1611 away from the first connecting portion 1613 and then is engaged with the slot 1611. In another exemplary embodiment, the setting of the local area outside the slot 1611 corresponding to the guide surface 1612 can be as follows: the guide surface 1612 and the slot 1611 are both arranged on the first engaging portion 1614, the slot edge of the slot 1611 can include a first part close to the first connecting portion 1613, a second part away from the first connecting portion 1613, and two third parts connected between the first part and the second part and arranged opposite to each other, and the guide surface 1612 can include sub-parts arranged corresponding to the two third parts, so that the locking protrusion 1621 can enter the slot 1611 after passing through the guide surfaces 1612 at the two sides of the slot 1611.

[0067] The shape of the card slot 1611 can be arbitrary, for example, the card slot 1611 can be roughly rectangular, circular, etc., and the embodiment of the present application does not limit this. Optionally, the shape of the card protrusion 1621 can be roughly adapted to the shape of the card slot 1611 to improve the connection stability between the card protrusion 1621 and the card slot 1611. Among them, the shape of the card protrusion 1621 and the card slot 1611 can be roughly adapted to: when the card protrusion 1621 is engaged with the card slot 1611, the outer peripheral surface of the card protrusion 1621 is roughly matched with the side wall 1616 of the card slot 1611. For example, the distance between the outer peripheral surface of the card protrusion 1621 and the side wall 1616 of the card slot 1611 can be within a preset range. Among them, the preset range can be flexibly adjusted in combination with actual usage, for example, the preset spacing can be within 1 mm, etc., and the embodiment of the present application does not limit this.

[0068] The depth dimension of the card slot 1611 may be greater than or equal to the height dimension of the card protrusion 1621, so that the card protrusion 1621 is locked in the card slot 1611. Optionally, the depth dimension of the card slot 1611 may be 0 to 3 mm greater than the height dimension of the card protrusion 1621, so as to ensure the connection stability between the card protrusion 1621 and the card slot 1611 while ensuring that the card protrusion 1621 can be locked in the card slot 1611. Optionally, the depth dimension of the card slot 1611 may be greater than or equal to 5 mm and less than or equal to 7 mm; preferably, the depth dimension of the card slot 1611 may be 6.8 mm. Optionally, the height dimension of the card protrusion 1621 may be greater than or equal to 5 mm and less than or equal to 7 mm; preferably, the height dimension of the card protrusion 1621 may be 6.2 mm.

[0069] In order to realize the lightweight design of the clamping protrusion 1621, the clamping protrusion 1621 can be a hollow structure. In order to facilitate the detailed description of the specific structure of the clamping protrusion 1621, the first clamping member 161 connected to the handrail frame 130 is taken as an example for exemplary description. The clamping protrusion 1621 can include a first end plate 1622 away from the handrail frame 130, and a side plate 1623 connected between the first end plate 1622 and the outer peripheral surface of the handrail frame 130, so that when the clamping protrusion 1621 is engaged with the card slot 1611, the first end plate 1622 can abut against the bottom wall 1615 of the card slot 1611, and the side plate 1623 can abut against the side wall 1616 of the card slot 1611. Further optionally, a through hole can be opened in the middle of the side plate 1623 to further realize the lightweight design of the clamping protrusion 1621.

[0070] Optionally, the side plate 1623 can be directly connected to the outer peripheral surface of the handrail frame 130. However, since the side plate 1623 is a thin plate structure, when connected to the outer peripheral surface of the handrail frame 130, the connection area between the two is relatively small and the connection strength is poor. Therefore, the clamping protrusion 1621 can also include a flange 1624 arranged around the outer periphery of the side plate 1623, so that the side plate 1623 and the flange 1624 of the clamping protrusion 1621 can be connected to the outer peripheral surface of the handrail frame 130, thereby improving the connection reliability between the clamping protrusion 1621 and the handrail frame 130. Optionally, the height dimension of the flange 1624 can be within 1 mm. It should be noted that the latch 1621 may also include a second end plate (not shown in the figure) connected to the side plate 1623 away from the first end plate 1622. The second end plate as a whole may be connected to the outer peripheral surface of the handrail frame 130 to improve the connection reliability between the latch 1621 and the handrail frame 130. The embodiment of the present application does not limit the structure of the latch 1621.

[0071] The clamping protrusion 1621 has a first end surface 1625 away from the outer peripheral surface of the handrail frame 130, and a first side surface 1626 connected to the first end surface 1625. In order to facilitate the clamping protrusion 1621 to be clamped into the clamping groove 1611, a chamfered surface 1627 can be provided between the first end surface 1625 and the first side surface 1626. The chamfered surface 1627 can be a right-angled chamfered surface or a rounded chamfered surface.

[0072] In order to improve the connection stability between the second engaging member 162 and the armrest frame 130, the second engaging member 162 includes a protrusion 1621 and a Figure 4 The second engaging member 162 may further include a second connecting portion 1628, which may be sleeved on the armrest 130, and the locking protrusion 1621 may be connected to the second connecting portion 1628. The second connecting portion 1628 may be fixedly sleeved on the armrest 130, or movably sleeved on the armrest 130, which is not limited in the embodiment of the present application.

[0073] Optionally, the first engaging member 161 may be connected to one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130 in a fixed connection or a rotating connection. When the first engaging member 161 is connected to one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130 in a fixed connection, the engaging connection between the engaging protrusion 1621 and the engaging groove 1611 can be completed during the folding process of the cart 100, and the connection between the engaging protrusion 1621 and the engaging groove 1611 can be released during the unfolding process of the cart 100, thereby reducing the manual operation process. When the first engaging member 161 is rotatably connected to one of the front leg frame 110, the rear leg frame 120 and the armrest frame 130, the first engaging member 161 can be manually or electrically controlled to rotate after the cart 100 is folded to achieve the engaging connection between the engaging protrusion 1621 and the engaging groove 1611; and the first engaging member 161 can be manually or electrically controlled to rotate before the cart 100 is unfolded to release the connection between the engaging protrusion 1621 and the engaging groove 1611, so that the cart 100 will not be hindered by the engaging protrusion 1621 and the engaging groove 1611 when folding or unfolding, which is conducive to the rapid folding and unfolding of the cart 100.

[0074] Specifically, if the first engaging member 161 is provided on the rear leg frame 120 as an example for illustrative description, in an exemplary solution, the first engaging member 161 and the rear leg frame 120 are rotatably connected to each other by a rotating shaft. In another exemplary solution, please refer to Figure 6 The cart 100 may further include a linkage rod 170, which may be hinged to both the front leg frame 110 and the rear leg frame 120, and the first engaging member 161 may be rotatably connected to the rear leg frame 120 as follows: the first engaging member 161 is disposed at the hinge between the rear leg frame 120 and the linkage rod 170, and the first engaging member 161 is connected to the linkage rod 170 and may rotate with the linkage rod 170. Since the linkage rod 170 hinged between the front leg frame 110 and the rear leg frame 120 will also rotate when the front leg frame 110 and the rear leg frame 120 rotate relative to each other to fold the cart 100, the first engaging member 161 is designed to rotate along with the rotation of the linkage rod 170. It can be achieved that after the cart 100 is folded into place, the first engaging member 161 just rotates to the second engaging member 162 and completes the engaging connection with the second engaging member 162. During the unfolding process of the cart 100, the first engaging member 161 gradually disengages from the connection with the second engaging member 162.

[0075] Optionally, the linkage rod 170 may be substantially U-shaped to improve the stability of the movement of the linkage rod 170. Specifically, the linkage rod 170 may include a first rod body 171, a second rod body 172 spaced apart from the first rod body 171, and a third rod body 173 located on the same side of the first rod body 171 and the second rod body 172 and connecting one end of the first rod body 171 and one end of the second rod body 172. An end of the first rod body 171 away from the third rod body 173 may be hinged to the first front leg 111, an end of the second rod body 172 away from the third rod body 173 may be hinged to the second front leg 112, an end of the first rod body 171 close to the third rod body 173 may be hinged to the first rear leg 121, and an end of the first rod body 171 close to the third rod body 173 may be hinged to the second rear leg 122. The first engaging member 161 can be located on the side where the first rear leg 121 is located and connected to the first rear leg 121 and the first rod 171 so as to be able to move with the first rod 171; or, the first engaging member 161 can be located on the side where the second rear leg 122 is located and connected to the second rear leg 122 and the second rod 172 so as to be able to move with the second rod 172.

[0076] Optionally, a damping member may be provided between the first engaging member 161 and the rear leg frame 120 to prevent the first engaging member 161 from swinging during use.

[0077] The cart 100 may further include a locking member 180 for locking the cart 100 in the unfolded state. The locking member 180 may be used to lock the unfolding between the front leg frame 110 and the armrest frame 130 and / or the unfolding between the rear leg frame 120 and the armrest frame 130. The following will take the example of the locking member 180 locking the unfolding between the front leg frame 110 and the armrest frame 130 as an example for exemplary description:

[0078] The locking member 180 has a locked state and a released state. After the front leg frame 110 and the armrest frame 130 are unfolded to a preset angle, the locking member 180 can be in a locked state to maintain the unfolded angle of the front leg frame 110 and the armrest frame 130. When the front leg frame 110 and the armrest frame 130 need to be folded, the locking member 180 can be in a released state to unlock the front leg frame 110 and the armrest frame 130.

[0079] See also Figure 7 The locking member 180 may include a locking portion 181, a linkage portion 182 and a trigger portion 183. The trigger portion 183 may act on the linkage portion 182 to connect the linkage portion 182 with the locking portion 181, so that the locking member 180 is in a locked state; the trigger portion 183 may also release the action on the linkage portion 182 to release the connection between the linkage portion 182 and the locking portion 181, so that the locking member 180 is in an unlocked state.

[0080] The cart 100 may include a mounting seat 190, and the mounting seat 190 may have a receiving cavity, and at least part of the locking portion 181, the linkage portion 182, and the trigger portion 183 may be received in the receiving cavity. Optionally, the mounting seat 190 may include a first seat body 191 and a second seat body 192 that are arranged opposite to each other, and a receiving cavity may be formed between the first seat body 191 and the second seat body 192.

[0081] The trigger portion 183 may include a pressing block 1831, one end of which may be located in the accommodating cavity and abut against the linkage portion 182, and the other end may be exposed on the mounting seat 190, so that when the pressing block 1831 is pushed to expose one end of the mounting seat 190, the pressing block 1831 can drive the linkage portion 182 to move to achieve connection or release of the connection with the locking portion 181, that is, to achieve the switching of the locking member 180 between the locked state and the released state. In order to make the switching between the locked state and the released state of the locking member 180 smoother and reduce the consumption of the release force during energy transfer, the end of the pressing block 1831 exposed from the mounting seat 190 can be provided with at least one trigger slope 1832. The pressing block 1831 can be pushed more easily by contacting the trigger slope 1832. When the trigger slopes 1832 are provided on both sides of the pressing block 1831, when the cart 100 rotates forward and reverse, the pressing block 1831 can receive the release force by contacting different trigger slopes 1832, thereby driving the locking portion 181 to shift.

[0082] Optionally, the mounting seat 190 may be provided with an opening communicating with the accommodating cavity, one end of the pressing block 1831 may be located in the accommodating cavity and abut the linkage portion 182, and the other end may pass through the opening and be exposed to the mounting seat 190. The at least one triggering inclined surface 1832 of the pressing block 1831 and the end surface of the opening of the mounting seat 190 may form an angle of 35° to 55°, so that the operator can press the triggering inclined surface 1832 and move the triggering inclined surface 1832 toward the opening, so as to switch the locking member 180 from the locked state to the unlocked state. Preferably, the at least one triggering inclined surface 1832 of the pressing block 1831 and the end surface of the opening of the mounting seat 190 may form an angle of 47°, so that the pressing effect of the pressing block 1831 is optimal and the operation is more labor-saving.

[0083] It should be noted that the pressing block 1831 can also be completely wrapped; for example, see Fig.11 The pressing block 1831 is wrapped by the shell 20. At this time, the shell 20 may include a pressing surface 21 corresponding to each trigger slope 1832, and the position of the shell 20 close to the pressing surface 21 may be made of elastic material.

[0084] The trigger portion 183 may include a rotating plate 1833, one end of which may be located in the accommodating cavity and abut the linkage portion 182, and the other end of the rotating plate 1833 may pass through the first seat body 191 and be exposed to the mounting seat 190, and the middle portion of the rotating plate 1833 is rotatably connected to the first seat body 191, so that after the portion of the rotating plate 1833 located outside the first seat body 191 is pried open, the rotating plate 1833 can rotate relative to the first seat body 191 so that the end of the rotating plate 1833 located in the accommodating cavity can drive the linkage portion 182 to move, so as to achieve connection or release of the connection with the locking member 180.

[0085] See also Figure 7 and Figure 8 The first seat body 191 may be provided with a first mounting hole 1911 communicating with the accommodating cavity, a rotating shaft 1912 may be provided in the first mounting hole 1911, one end of the rotating plate 1833 may be located in the accommodating cavity, and the other end may pass through the first mounting hole 1911 and be rotatably connected with the rotating shaft 1912 in the first mounting hole 1911 and then be located outside the first seat body 191. Optionally, a mounting block 193 may be provided in the first mounting hole 1911, and the rotating shaft 1912 may be connected to the mounting block 193.

[0086] See also Fig. 9 , Fig. 9 for Figure 8 In the enlarged view of the structure at A in the middle, the inner wall surface of the first mounting hole 1911 may include a first wall surface 1913 and a second wall surface 1914 arranged opposite to each other, a first gap 194 may be provided between the mounting block 193 and the first wall surface 1913, a second gap 195 may be provided between the mounting block 193 and the second wall surface 1914, and the rotating shaft 1912 may include a first shaft body 1916 located at the first gap 194 and connected to the first wall surface 1913 and the mounting block 193 at both ends, and a second shaft body 1917 located at the second gap 195 and connected to the second wall surface 1914 and the mounting block 193 at both ends. The rotating plate 1833 may be provided with a first rotating hole corresponding to the first shaft body 1916 and a second rotating hole corresponding to the second shaft body 1917.

[0087] The mounting block 193 may be provided with a second mounting hole 1931, a first connecting hole 1932 connecting the second mounting hole 1931 with the first gap 194, and a second connecting hole 1933 connecting the second mounting hole 1931 with the second gap 195. A spring piece 196 may be provided in the second mounting hole 1931. One end of the first shaft 1916 may be located in the first gap 194, and the other end may pass through the first connecting hole 1932 and be located in the second mounting hole 1931. One end of the second shaft 1917 may be located in the second gap 195, and the other end may pass through the second connecting hole 1933 and be located in the second mounting hole 1931. The first shaft 1916 and the second shaft 1917 are respectively located at opposite ends of the spring piece 196. By providing the spring piece 196 in the second mounting hole 1931, the first shaft 1916 and the second shaft 1917 may be limited to prevent the first shaft 1916 and the second shaft 1917 from falling off.

[0088] Optionally, the first shaft body 1916 and the second shaft body 1917 may both include an end and a rod body, and the end may be located in the second mounting hole 1931 to increase the effective area when the first shaft body 1916 and the spring sheet 196, and the second shaft body 1917 and the spring sheet 196 act, so that the first shaft body 1916 and the second shaft body 1917 can be more stably installed on the first base body 191.

[0089] The rotating plate 1833 can be manually controlled to rotate. The rotating plate 1833 can be controlled to rotate by a webbing, for example, one end of the webbing can be set on the front leg frame 110, the rear leg frame 120 or the armrest frame 130, and the other end can be connected to the part of the rotating plate 1833 exposed on the mounting seat 190, so that pulling the webbing can switch the locking member 180 from the locked state to the unlocked state, which is convenient for operation. It should be noted that, refer to Figures 11 to 13 When the stroller 100 includes a seat 30, the seat 30 can be linked to the pressing block 1831; for example, the seat 30 can include the above-mentioned shell 20, the shell 20 can wrap the pressing block 1831, and the shell 20 can include a pressing surface 21 corresponding to each triggering inclined surface 1832 of the pressing block 1831, so that the locking member 180 can be driven to switch to the unlocked state through the seat 30. In this way, when the stroller 100 is equipped with a seat 30, the locking member 180 can be driven by the seat 30, and when the stroller 100 is not equipped with a seat 30, the locking member 180 can be driven by the webbing. These two folding methods are not only convenient for folding, but also provide a good user operation experience.

[0090] Optionally, refer again to Figure 7The linkage portion 182 may include an elastic portion 1821, a plug-in portion 1822, a first action portion 1823 and a second action portion 1824. The elastic portion 1821 may be installed in the mounting seat 190. One end of the plug-in portion 1822 may be connected to the elastic portion 1821. The other end of the plug-in portion 1822 may be set toward the locking portion 181. Both the first action portion 1823 and the second action portion 1824 may be connected to the plug-in portion 1822. The first abutting surface 1834 of the push block 1831 can abut against the first acting portion 1823, and the second abutting surface 1835 of the rotating plate 1833 can abut against the second acting portion 1824, so that under the action of the push block 1831 or the rotating plate 1833, the first acting portion 1823 or the second acting portion 1824 can drive the plug-in portion 1822 to move in a direction away from the locking portion 181 to release the connection between the plug-in portion 1822 and the locking portion 181, so that the locking member 180 is in a released state, and the elastic portion 1821 is in a compressed state. When the push block 1831 and the rotating plate 1833 do not apply an action force to the first acting portion 1823 and the second acting portion 1824, the plug-in portion 1822 will move in a direction close to the locking portion 181 under the elastic action of the elastic portion 1821 to connect with the locking portion 181, so that the locking member 180 is in a locked state.

[0091] Preferably, see Fig.10 The locking portion 181 may be provided with a groove 1811, and the plug-in portion 1822 may be moved out of the groove 1811 of the locking portion 181 when it moves in a direction away from the locking portion 181, so that the locking member 180 is in a released state; the plug-in portion 1822 may be inserted into the groove 1811 when it moves in a direction close to the locking portion 181, so that the locking member 180 is in a locked state. In the locked state, the connection between the plug-in portion 1822 and the locking portion 181 is more stable.

[0092] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A cart, characterized in that: include: Front leg rack; An armrest frame, hinged to the front leg frame; A rear leg frame, hinged to the armrest frame; A front wheel connected to an end of the front leg frame away from the armrest frame; A rear wheel connected to an end of the rear leg frame away from the armrest frame; The clamping structure comprises a first clamping member and a second clamping member for use together, wherein the first clamping member is rotatably connected to the rear leg frame, and the second clamping member is connected to the armrest frame, and after the front leg frame, the rear leg frame and the armrest frame are folded together, the first clamping member can be clamped and connected with the second clamping member; A linkage rod, wherein the linkage rod is hinged to the front leg frame and the rear leg frame, the first engaging member is arranged at the hinge between the rear leg frame and the linkage rod, the first engaging member is connected to the linkage rod and can rotate with the linkage rod, after the cart is folded into place, the first engaging member just rotates to the second engaging member and completes the engaging connection with the second engaging member, and during the unfolding of the cart, the first engaging member gradually disengages from the connection with the second engaging member.

2. The cart according to claim 1, characterized in that: The first engaging member is provided with a locking groove, and the second engaging member is provided with a locking protrusion, and the locking protrusion can be locked in the locking groove.

3. The cart according to claim 2, characterized in that: The first engaging member has a guide surface, and the guide surface and the slot are arranged on the same side of the first engaging member. From one end close to the slot to the end away from the slot, the guide surface extends from a notch close to the slot toward a direction close to the bottom wall of the slot, and the second engaging member can slide over the guide surface and then be engaged in the slot.

4. The cart according to claim 3, characterized in that: The first engaging member comprises: A first connecting portion, connecting one of the front leg frame, the rear leg frame and the armrest frame; The first engaging portion is connected to the first connecting portion and protrudes from the front leg frame, the rear leg frame and the armrest frame, and the first engaging portion is provided with the engaging groove.

5. The cart according to claim 4, characterized in that: The first engaging portion is provided with the engaging groove on one side close to the first connecting portion, and the first engaging portion is provided with the guiding surface on one side away from the first connecting portion.

6. The cart according to claim 2, wherein: The latching protrusion includes a first end plate facing away from the handrail frame, and a side plate connected between the first end plate and the handrail frame. When the latching protrusion is latched in the slot, the first end plate abuts against the bottom wall of the slot, and the side plate abuts against the side wall of the slot.

7. The cart according to claim 6, wherein: The clamping protrusion also includes a convex edge arranged around the outer periphery of the side plate, and the convex edge connects the side plate and the handrail frame.

Images