cart

Abstract

This concerns the technology of infant and toddler carriers, particularly those related to carts. [Solution] The present invention relates to a cart, the cart including a handle frame comprising an upper handle frame and a lower handle frame that are pivotably connected; a canopy mechanism that is pivotally connected to the lower handle frame and is provided to be linked with the upper handle frame; and a locking mechanism disposed between the canopy mechanism and the lower handle frame that restricts or allows the canopy mechanism to pivot relative to the lower handle frame, wherein in the process of the upper handle frame pivoting relative to the lower handle frame, the upper handle frame drives to fold or unfold the canopy mechanism and drives to unlock the locking mechanism, thereby driving the canopy mechanism to pivot toward or away from the lower handle frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of infant carriers, and in particular to a stroller. BACKGROUND ART

[0002] In the field of outings with infants, strollers are commonly used tools. In order to provide a comfortable and safe riding environment for infants, strollers are usually equipped with an adjustable canopy mechanism that realizes functions such as sunshade, rain protection, and wind protection, to meet the needs of various usage scenarios. However, for strollers currently on the market, during folding or unfolding operations, the canopy mechanism cannot perform corresponding movements in synchronization with the entire stroller, and it is necessary to separately manually fold or unfold the canopy mechanism. According to such an operation mode, not only the user's operation procedures and difficulty are increased, the operation becomes complex and cumbersome, but also the convenience and efficiency of use are reduced to a certain extent. SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0003] Based on this, it is necessary to provide a stroller for addressing the above problems. MEANS FOR SOLVING THE PROBLEMS

[0004] One aspect of the present invention provides a cart comprising a handle frame including an upper handle frame and a lower handle frame that are pivotably connected; a canopy mechanism that is pivotally connected to the lower handle frame and is provided to be linked with the upper handle frame; and a locking mechanism disposed between the canopy mechanism and the lower handle frame for restricting or allowing the canopy mechanism to pivot relative to the lower handle frame, wherein in the process of the upper handle frame pivoting relative to the lower handle frame, the upper handle frame drives to fold or unfold the canopy mechanism and drives to unlock the locking mechanism, thereby driving the canopy mechanism to pivot toward or away from the lower handle frame.

[0005] In one embodiment, when the upper handle frame pivots toward the lower handle frame, the upper handle frame drives the canopy mechanism to fold, and the folded canopy mechanism pivots toward the lower handle frame in conjunction with the pivot of the upper handle frame, or When the upper handle frame pivots away from the lower handle frame, the upper handle frame is driven to deploy the canopy mechanism, and the deployed canopy mechanism pivots away from the lower handle frame in conjunction with the pivot of the upper handle frame.

[0006] In one embodiment, the canopy mechanism includes a support seat and a first canopy bar connected to each other, the support seat being pivotable around a rotation axis relative to the lower handle frame so that the first canopy bar is pivotable relative to the lower handle frame, the process of the upper handle frame pivoting relative to the lower handle frame includes a first step of fixing the support seat and the first canopy bar relative to the lower handle frame, and a second step of driving the upper handle frame to pivot in a direction toward or away from the lower handle frame.

[0007] In one embodiment, the canopy mechanism has an extended state and a folded state, and the canopy mechanism further includes a second canopy bar, the second canopy bar is fixed to the upper handle frame and pivotable relative to the lower handle frame in accordance with the upper handle frame, and when the canopy mechanism is in the extended state, the first canopy bar and the second canopy bar are separated from each other, and when the canopy mechanism is in the folded state, the first canopy bar and the second canopy bar are brought closer to each other.

[0008] In one embodiment, the width of the first canopy bar in the first direction is W1, the width of the second canopy bar in the first direction is W2, and the width of the upper handle frame in the first direction is W3, where W1 > W3 > W2.

[0009] In one embodiment, the handle frame further includes a first pivot joint, the first pivot joint including a first connecting seat and a second connecting seat pivotally connected to each other, the first connecting seat being connected to the upper handle frame and the second connecting seat being connected to the lower handle frame, and the support seat being rotatable about the axis of rotation and provided on the side of the second connecting seat away from the first connecting seat.

[0010] In one embodiment, the locking mechanism includes an engaging projection and an engaging recess, wherein the engaging recess is provided on one of the support seat and the second connecting seat, and the engaging projection is provided on the other, and when the engaging projection is inserted into the engaging recess, the rotation of the support seat relative to the second connecting seat is restricted, and when the engaging projection is disengaged from the engaging recess, the rotation of the support seat relative to the second connecting seat is permitted.

[0011] In one embodiment, the engagement recesses are provided in a plurality of positions spaced apart in the circumferential direction of the rotation axis, and in the first stage, the engagement projection is maintained to be inserted into the current engagement recess, and in the second stage, the engagement projections sequentially disengage from the current engagement recess and are inserted into adjacent engagement recesses so as to restrict the support seat from continuously rotating relative to the second connecting seat.

[0012] In one embodiment, the support seat has a first position and a second position, and is movable along the axial direction of the rotation axis relative to the second connecting seat, and when the support seat is in the first position, the engaging projection is inserted into the engaging recess, and when the support seat is in the second position, the engaging projection is disengaged from the engaging recess, and in the first stage the support seat is held in the first position, and in the second stage the support seat is reciprocated between the first position and the second position.

[0013] In one embodiment, the handle frame further includes a cover body provided on the side of the support seat away from the second connecting seat and connected to the second connecting seat, having a movable gap between itself and the support seat that allows the support seat to move along the axial direction of the rotation axis, and a first elastic member provided in the movable gap and in contact with the cover body and the support seat so as to hold the support seat in the first position.

[0014] In one embodiment, guide slopes are provided on the engaging recess and / or engaging projection, and when the support seat rotates relative to the second connecting seat, the engaging projection pushes against the engaging recess via the guide slope, driving the support seat to switch from the first position to the second position.

[0015] In one embodiment, the support seat and the second connecting seat, on which the engaging recess is provided, are further provided with a locking recess for locking and engaging with the engaging projection, and the size of the locking recess is different from the size of the engaging recess.

[0016] In one embodiment, a sliding slope is provided on the lock recess and / or the engaging projection, and the engaging projection disengages from the lock recess by pushing against the lock recess via the sliding slope.

[0017] In one embodiment, a position-restricting rib is provided on one of the second connecting seat and the support seat, and a position-restricting groove is provided on the other, and the position-restricting rib is insertable into the position-restricting groove in a direction parallel to the axis of rotation. When the engaging projection disengages from the engaging recess, the position-restricting rib disengages from the position-restricting groove.

[0018] In one embodiment, a position-restricting rib is provided on one of the second connecting seat and the support seat, and a position-restricting groove is provided on the other. The position-restricting rib is inserted into and held in the position-restricting groove along a direction parallel to the axis of rotation, thereby restricting the rotational stroke of the end of the position-restricting groove of the support seat relative to the second connecting seat.

[0019] In one embodiment, the support seat and the second connecting seat, on the side where the engagement recess is provided, are further provided with a lock recess for locking and engaging with the engagement projection, and the lock recess is provided facing the end of the position limiting groove along the radial direction of the rotation axis.

[0020] In one embodiment, the locking mechanism includes a bracket, an engaging projection, and an engaging recess, wherein the bracket is provided between the second connecting seat and the support seat so as to be movable along the axial direction of the rotation axis, and rotation relative to the second connecting seat is restricted, the engaging recess is provided on one of the support seat and the bracket, and the engaging projection is provided on the other, and when the engaging projection is inserted into the engaging recess, rotation of the support seat relative to the second connecting seat is restricted, and when the engaging projection disengages from the engaging recess, rotation of the support seat relative to the second connecting seat is permitted.

[0021] In one embodiment, the engagement recesses are provided in a plurality of positions spaced apart in the circumferential direction of the rotation axis, and in the first stage, the engagement projection is maintained to be inserted into the current engagement recess, and in the second stage, the engagement projections sequentially disengage from the current engagement recess and are inserted into adjacent engagement recesses so as to restrict the support seat from continuously rotating relative to the second connecting seat.

[0022] In one embodiment, the locking mechanism further includes a positioning recess provided in the second connecting seat, the bracket is provided with the engaging projection, the bracket has a third position and a fourth position, the support seat is provided with the engaging recess, when the bracket is in the third position, the engaging projection engages simultaneously with the engaging recess and the positioning recess to restrict the rotation of the support seat relative to the second connecting seat, and when the bracket is in the fourth position, the engaging projection engages with the positioning recess and disengages from the engaging recess, allowing the rotation of the support seat relative to the second connecting seat.

[0023] In one embodiment, guide slopes are provided on the engaging recess and / or engaging projection, and when the support seat rotates relative to the second connecting seat, the engaging projection pushes against the engaging recess via the guide slope, driving the bracket to switch from the third position to the fourth position.

[0024] In one embodiment, a second elastic member is disposed between the bracket and the second connection seat, and the second elastic member drives the bracket to be held at the third position.

[0025] In one embodiment, one of the second connection seat and the bracket is further provided with a position limiting protrusion, and the other is further provided with a position limiting recess, and the position limiting protrusion engages with the position limiting recess to limit rotation of the bracket relative to the second connection seat.

[0026] In one embodiment, the handle frame further includes a lock retaining mechanism disposed between the upper handle frame and the lower handle frame, and when the upper handle frame is pivoted relative to the lower handle frame and folded, the lock retaining mechanism locks the upper handle frame and the lower handle frame to restrict the upper handle frame from unfolding relative to the lower handle frame.

[0027] Another aspect of the present application further provides a cart, which includes a handle frame, a canopy mechanism rotatably disposed on the handle frame, and a lock mechanism disposed between the handle frame and the canopy mechanism for limiting continuous rotation of the canopy mechanism relative to the handle frame.

[0028] The drawings constituting part of the present application are for the purpose of further understanding of the present application, and the exemplary embodiments of the present application and the descriptions thereof are for the purpose of interpreting the present application, and do not unduly limit the present application.

[0029] In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments are briefly described below. Obviously, the drawings in the following description are only some embodiments of the present application, and a person of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0030] Furthermore, the drawings are not drawn to a 1:1 scale, and the relative dimensions of each element are only shown as examples and are not necessarily drawn to the actual scale. [Brief explanation of the drawing]

[0031] [Figure 1] Figure 1 is a side view of a cart with the canopy mechanism in the deployed state, according to one embodiment of the present invention. [Figure 2] Figure 2 is a side view of a cart according to one embodiment of the present invention, in which the canopy mechanism is in a state between unfolded and folded. [Figure 3] Figure 3 is a side view of a cart according to one embodiment of the present invention, showing that the cart is between the unfolded and folded states, and the canopy mechanism is close to the folded state. [Figure 4] Figure 4 is a side view of a cart according to one embodiment of the present invention, showing the cart in a folded state and the canopy mechanism in a folded state. [Figure 5] Figure 5 is a side view of a handle frame according to one embodiment of the present invention, showing the handle frame unfolded and the canopy mechanism in a folded state. [Figure 6] Figure 6 is a front view of the handle frame shown in Figure 5. [Figure 7] Figure 7 is a perspective view of a handle frame according to the first embodiment of the present application. [Figure 8] Figure 8 is an exploded view of the handle frame shown in Figure 7. [Figure 9] Figure 9 is an enlarged view of the configuration of area A in Figure 8. [Figure 10] Figure 10 is an enlarged view of the configuration of area B in Figure 9. [Figure 11] Figure 11 is an enlarged view of the configuration of area C in Figure 9. [Figure 12] Figure 12 is a cross-sectional view along the line U1-U1 in Figure 5, showing the support base in the first position. [Figure 13]Figure 13 is a cross-sectional view along the line U2-U2 in Figure 7, showing the support base in the second position. [Figure 14] Figure 14 is a side view of the handle frame according to the first embodiment of the present application, showing the handle frame unfolded and the canopy mechanism in the unfolded state. [Figure 15] Figure 15 is a side view of the handle frame according to the first embodiment of the present application, showing that the handle frame is in a state between unfolded and folded, and the canopy mechanism is close to the folded state. [Figure 16] Figure 16 is a side view of the cart in a folded state according to the first embodiment of the present application, in which the cover body is omitted. [Figure 17] Figure 17 is a cross-sectional view along the line U3-U3 in Figure 1, with the wheel frame omitted. [Figure 18] Figure 18 is a perspective view of the support seat in a cart according to the second embodiment of the present application. [Figure 19] Figure 19 is a side view of a handle frame according to a second embodiment of the present application, showing the handle frame unfolded and the canopy mechanism in the unfolded state. [Figure 20] Figure 20 is an exploded view of the handle frame of a cart according to the third embodiment of the present application. [Figure 21] Figure 21 is a cross-sectional view of the handle frame of a cart according to the third embodiment of the present application. [Figure 22] Figure 22 is a perspective view of a cart according to the fourth embodiment of the present application. [Figure 23] Figure 23 is a cross-sectional view along the line U4-U4 in Figure 22. [Figure 24] Figure 24 is a cross-sectional view of a cart in a folded state according to the fourth embodiment of the present application. [Figure 25] Figure 25 is an exploded view of a portion of the cart configuration shown in Figure 22. [Figure 26] Figure 26 is an enlarged view of the configuration at point D in Figure 25. [Figure 27]Figure 27 is an exploded view of a part of the handle frame in a cart according to the fifth embodiment of the present application. [Figure 28] Figure 28 is a cross-sectional view of the first pivot joint along the line U5-U5 in Figure 27. [Figure 29] Figure 29 is a three-dimensional view of the upper handle frame in the handle frame shown in Figure 27 when it is in the folded position. [Figure 30] Figure 30 is a cross-sectional view along the line U6-U6 in Figure 29, with the handle frame omitted. [Modes for carrying out the invention]

[0032] To provide a clearer understanding of the above-mentioned objectives, features, and advantages of the present application, specific embodiments of the present application will be described in detail below with reference to the drawings. The following description will provide many specific details in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application; therefore, the present application is not limited to the specific embodiments disclosed below.

[0033] Some embodiments of this disclosure provide a cart 10 having a generally symmetrical overall structure that can be used as a stroller, pet cart, or luggage cart, etc. For example, this embodiment describes the configuration and operating principle of using the cart 10 as a stroller.

[0034] Referring to Figures 1 to 4, in one embodiment, the cart 10 includes, for example, a handle frame 100 and a wheel frame 200, and the handle frame 100 and the wheel frame 200 are pivotally connected to each other so that the cart 10 can be switched between an unfolded state (see Figure 1) and a folded state (see Figure 4). The wheel frame 200 includes a front wheel frame 210 and a rear wheel frame 220, which may be pivotally attached to each other at, for example, a second pivot point Q2, or pivotally connected to the second pivot point Q2 via a second pivot joint 500. The handle frame 100 may be pivotally attached to the front wheel frame 210 or the rear wheel frame 220 individually, or of course, the handle frame 100 may be pivotally attached to the front wheel frame 210 and the rear wheel frame 220 simultaneously, and is not specifically limited herein. In this embodiment, the handle frame 100 is pivotally attached to the front wheel frame 210 and the rear wheel frame 220 via the second pivot joint 500. In other words, the handle frame 100, the front wheel frame 210, and the rear wheel frame 220 are pivotally attached to the second pivot point Q2. As shown in Figure 1, when the cart 10 is in the unfolded state, the handle frame 100, the front wheel frame 210, and the rear wheel frame 220 are spaced apart around the circumferential direction of the second pivot joint 500, and the rear wheel frame 220 is positioned between the front wheel frame 210 and the handle frame 100 around the circumferential direction of the second pivot joint 500. A first angle α1 is formed between the front wheel frame 210 and the rear wheel frame 220, a second angle α2 is formed between the handle frame 100 and the rear wheel frame 220, and a third angle α3 is formed between the handle frame 100 and the front wheel frame 210.As shown in Figure 4, when the cart 10 is folded, the rear wheel frame 220 and the front wheel frame 210 are close to each other, forming a fourth angle α4 between the front wheel frame 210 and the rear wheel frame 220. The handle frame 100 is close to the rear wheel frame 220, forming a fifth angle α5 between the handle frame 100 and the rear wheel frame 220, and a sixth angle α6 between the handle frame 100 and the front wheel frame 210. Note that α1 > α4, α2 > α5, and α3 > α6. Therefore, when the cart 10 needs to be used, it can be unfolded. When the cart 10 needs to be stored, it can be folded, thus saving space and facilitating storage.

[0035] In one embodiment, as shown in Figures 1 to 4, the handle frame 100 includes a pivotally connected upper handle frame 110 and a lower handle frame 120, both pivotally connected to a first pivot point Q1, and the end of the lower handle frame 120 away from the upper handle frame 110 is connected to a second pivot joint 500. The handle frame 100 is designed to be foldable, thereby allowing the cart 10 to have a smaller folded volume when folded. In this embodiment, when the cart 10 is unfolded, the aforementioned second angle α2 is formed between the lower handle frame 120 and the rear wheel frame 220, and the aforementioned third angle α3 is formed between the lower handle frame 120 and the front wheel frame 210. The angle between the upper handle frame 110 and the lower handle frame 120 is 180°, and they can be considered to be on the same plane (see Figure 1). Of course, in other embodiments, when the cart 10 is in the unfolded state, the angle between the upper handle frame 110 and the lower handle frame 120 may be greater than or less than 180°, and is not specifically limited thereto. Specifically, when the cart 10 switches from the unfolded state to the folded state, the upper handle frame 110 pivots relative to the lower handle frame 120 and folds close to the lower handle frame 120, and the lower handle frame 120 pivots around the second pivot joint 500 and folds close to the rear wheel frame 220. When the cart 10 switches from the folded state to the unfolded state, the upper handle frame 110 pivots relative to the lower handle frame 120 and moves away from the lower handle frame 120, and the lower handle frame 120 pivots around the second pivot joint 500 and moves away from the rear wheel frame 220.

[0036] Referring to Figures 1 to 6, in some embodiments, the cart 10 further includes a canopy mechanism 300 and a locking mechanism 400 (see Figure 9; specific configurations are described below). The canopy mechanism 300 can be installed to pivot relative to the lower handle frame 120 and to be interlocked with the upper handle frame 110. The locking mechanism 400 is provided between the canopy mechanism 300 and the lower handle frame 120 and restricts or allows the pivoting of the canopy mechanism 300 relative to the lower handle frame 120. In the process of the upper handle frame 110 pivoting relative to the lower handle frame 120, the upper handle frame 110 drives the canopy mechanism 300 to fold or unfold, and drives an external force to the canopy mechanism 300 to drive the locking mechanism 400 to unlock, thereby driving the canopy mechanism 300 to pivot in a direction toward or away from the lower handle frame 120.

[0037] Referring again to Figures 1 to 6, in one embodiment, the canopy mechanism 300 includes a support seat 310 and a first canopy bar 320 connected to each other. The support seat 310 is connected to the handle frame 100 and can rotate around a rotation axis S1 relative to the lower handle frame 120 so that the first canopy bar 320 can pivot relative to the lower handle frame 120. In one embodiment, the canopy mechanism 300 further includes a second canopy bar 330, which is fixed to the upper handle frame 110 and can pivot together with the upper handle frame 110 relative to the lower handle frame 120. In this embodiment, the canopy mechanism 300 has an extended state and a folded state. Specifically, as shown in Figure 1, when the canopy mechanism 300 is in the extended state, the first canopy bar 320 and the second canopy bar 330 are separated from each other. As shown in Figures 4 and 5, when the canopy mechanism 300 is in the folded state, the first canopy bar 320 and the second canopy bar 330 are close to each other. Specifically, the angle between the first canopy bar 320 and the second canopy bar 330 when the canopy mechanism 300 is in the deployed state is greater than the angle between the first canopy bar 320 and the second canopy bar 330 when the canopy mechanism 300 is in the folded state.

[0038] Furthermore, the above-mentioned "the second canopy bar 330 is fixed to the upper handle frame 110" can be achieved in various ways. For example, the second canopy bar 330 may be directly fixed and connected to the upper handle frame 110. Alternatively, the second canopy bar 330 may be indirectly connected to the upper handle frame 110 via other elements such as the first connecting seat 131. The methods are not specifically limited here.

[0039] Referring to Figures 1 to 3, in one embodiment, the canopy mechanism 300 further includes a canvas 350 connected between a first canopy bar 320 and a second canopy bar 330. As shown in Figure 1, when the canopy mechanism 300 is deployed, the second canopy bar 330 and the first canopy bar 320 are separated from each other, and the canvas 350 is fully deployed between the first canopy bar 320 and the second canopy bar 330. At this time, the canvas 350 forms a shielding surface of a certain area to block sunlight, rainwater, etc., providing a good riding environment for children. As shown in Figures 3 and 5, when the canopy mechanism 300 is folded, the second canopy bar 330 and the first canopy bar 320 are close to each other, and the canvas 350 is folded between the first canopy bar 320 and the second canopy bar 330. In this embodiment, as shown in Figure 4, when the cart 10 is folded, the canopy mechanism 300 is also folded, which reduces the space occupied by the cart 10 and contributes to the cart 10 having a small folded volume. As shown in Figure 1, when the cart 10 is unfolded, the canopy mechanism 300 may also be unfolded, and the canopy mechanism 300 can effectively perform functions such as sunshade, rain protection, and wind protection, improving the comfort of children when they ride in the cart 10.

[0040] In one embodiment, the process by which the upper handle frame 110 pivots relative to the lower handle frame 120 includes a first stage and a second stage. For example, when the cart 10 is in an unfolded state and the canopy mechanism 300 is in an unfolded state, in the process by which the upper handle frame 110 pivots relative to the lower handle frame 120 to fold the handle frame 100, referring to Figures 1 to 3, in the first stage, the second canopy bar 330 rotates together with the upper handle frame 110 and approaches the lower handle frame 120. During this process, the locking action of the locking mechanism 400 (the specific principle will be described later) maintains the state in which the first canopy bar 320 and the support seat 310 are fixed relative to the lower handle frame 120. As the second canopy bar 330 gradually approaches the first canopy bar 320, the taut canvas 350 gradually loses tension and loosens as the distance between the two canopy bars decreases, and naturally converges between the first canopy bar 320 and the second canopy bar 330 until the canopy mechanism 300 is folded. Referring to Figures 3 and 4, in the second stage, the canopy mechanism 300 is maintained in the folded state, and as the upper handle frame 110 continues to rotate, the upper handle frame 110 drives the entire canopy mechanism 300 to pivot toward the lower handle frame 120. That is, the continued pivoting of the upper handle frame 110 applies an external force (specifically, a thrust) to the first canopy bar 320, driving it to pivot toward the lower handle frame 120 together with the upper handle frame 110 until the upper handle frame 110 is fully folded toward the lower handle frame 120. In other words, as the upper handle frame 110 pivots toward the lower handle frame 120, the upper handle frame 110 first drives the canopy mechanism 300 to fold, and the folded canopy mechanism 300 then pivots toward the lower handle frame 120 in conjunction with the pivoting of the upper handle frame 110.Furthermore, for example, when the cart 10 is folded and the canopy mechanism 300 is also folded, in the process in which the upper handle frame 110 pivots relative to the lower handle frame 120 to unfold the handle frame 100, in the first stage, the second canopy bar 330 rotates together with the upper handle frame 110 and moves away from the lower handle frame 120. In this process, the locking action of the locking mechanism 400 fixes the first canopy bar 320 and the support seat 310 relative to the lower handle frame 120. As the second canopy bar 330 gradually moves away from the first canopy bar 320, the slack canvas 350 is gradually pulled until it is fully unfolded as the distance between the two canopy bars increases, thereby unfolding the canopy mechanism 300. In the second stage, the canopy mechanism 300 is maintained in the deployed state, and the upper handle frame 110 continues to rotate, driving the upper handle frame 110 to pivot the entire canopy mechanism 300 away from the lower handle frame 120. That is, the continued pivoting of the upper handle frame 110 applies an external force (specifically a tensile force) to the first canopy bar 320, driving it to pivot together with the first canopy bar 320 away from the lower handle frame 120 until the upper handle frame 110 is fully deployed relative to the lower handle frame 120. In other words, when the upper handle frame 110 pivots away from the lower handle frame 120, the upper handle frame 110 first drives the canopy mechanism 300 to deploy, and the deployed canopy mechanism 300 then pivots away from the lower handle frame 120 in conjunction with the pivoting of the upper handle frame 110. As can be seen from the above, in this embodiment, the canopy mechanism 300 can be operated in conjunction and synchronously to fold or unfold the cart 10 regardless of whether the cart 10 is being folded or unfolded, thereby eliminating the need for the user to individually operate the canopy mechanism 300 manually. This design simplifies the operation process during the unfolding or folding of the cart 10 and effectively improves the convenience and efficiency of using the cart 10.

[0041] It should be explained that the first canopy bar 320 can achieve movement toward or away from the lower handle frame 120 by driving the support seat 310 to pivot relative to the lower handle frame 120, only if the applied external force is greater than the force that allows the support seat 310 to overcome the locking force acting between the lower handle frame 120 and the support seat 310 by the locking mechanism 400.

[0042] In one embodiment, in addition to being able to drive the canopy mechanism 300 to switch synchronously between an extended state and a folded state during the process of folding or unfolding the cart 10, the user can also independently operate the canopy mechanism 300 to switch between an extended state and a folded state when the cart 10 is in an extended state. Specifically, in this embodiment, when the cart 10 is in an extended state and the canopy mechanism 300 is in an extended state, the canopy mechanism 300 can serve as a sunshade, rain shield, windbreak, etc. In this case, if the user wishes to fold the canopy mechanism 300 in order to expand the field of view of the child inside the cart 10, the user only needs to apply a force (e.g., thrust or tensile force) directly to the first canopy bar 320 that rotates it in a direction that brings it closer to the second canopy bar 330. Conversely, when the cart 10 is deployed and the canopy mechanism 300 is folded, when a user attempts to deploy the canopy mechanism 300, they only need to directly apply a force (e.g., thrust or tension) to the first canopy bar 320 that rotates it away from the second canopy bar 330. Similarly, the first canopy bar 320 can achieve the action of moving towards or away from the upper handle frame 110 by driving the support seat 310 to pivot relative to the lower handle frame 120, only if the applied force is greater than the force that overcomes the locking force acting between the lower handle frame 120 and the support seat 310 by the locking mechanism 400.

[0043] Referring to Figures 1 to 3, in one embodiment, the canopy mechanism 300 may further include at least one third canopy bar 340, the at least one third canopy bar 340 positioned between the first canopy bar 320 and the second canopy bar 330 to provide good support. Specifically, by providing the third canopy bar 340, the canopy area between the first canopy bar 320 and the second canopy bar 330 can be supported more effectively. Such support not only contributes to improving the overall structural stability of the canvas 350, but also contributes to reducing deformation, collapse, and other issues of the canvas 350, and further allows the canvas 350 to be laid flatter when deployed, contributing to improving the aesthetics and practicality of the canopy mechanism 300 when it is deployed.

[0044] Since the third canopy bar 340 is usually covered by the canvas 350, it is not normally visible from the outside of the canvas 350. In this embodiment, to clarify the position of the third canopy bar 340, it is shown with a dashed line in the relevant drawings.

[0045] Referring to Figure 6, in one embodiment, the width of the first canopy bar 320 along the left-right direction (i.e., the first direction F1) of the cart 10 is W1, the width of the second canopy bar 330 along the first direction F1 is W2, and the width of the upper handle frame 110 along the first direction F1 is W3. Note that W1 > W3 > W2. By setting the width in this way, conditions favorable to the rapid deployment or folding of the canopy mechanism 300 can be created, allowing the canopy mechanism 300 to be deployed or folded more smoothly and efficiently. Furthermore, this method of setting the width helps to ensure a visual effect in which the canopy mechanism 300 presents a harmonious and aesthetically pleasing appearance.

[0046] In each embodiment of the present invention, directional terms such as "left" and "right" relating to the cart 10 are expressed based on the "left" and "right" directions of a cart 10 in normal operation, unless otherwise specified, and the arrows L and R in the drawings schematically indicate the "left" and "right" directions. These directional terms are intended to clarify the description of the embodiments of the present invention and do not unduly limit the scope of protection of the present invention.

[0047] Referring to Figures 6 to 8, in one embodiment, the handle frame 100 further includes a first pivot joint 130. The upper handle frame 110 is pivotably connected to the lower handle frame 120 via the first pivot joint 130, and the end of the lower handle frame 120 away from the first pivot joint 130 is connected to a second pivot joint 500. A support seat 310 is provided on the first pivot joint 130 so as to be rotatable about a rotation axis S1. In other words, the support seat 310 is provided on the first pivot joint 130 and is rotatable about a rotation axis S1 relative to the first pivot joint 130. Specifically, in this embodiment, the first pivot joint 130 includes a first connecting seat 131 and a second connecting seat 132 that are pivotably connected to each other. Specifically, the first connecting seat 131 and the second connecting seat 132 are pivotally attached to a first pivot point Q1. The first connecting seat 131 is connected to the upper handle frame 110, and the second connecting seat 132 is connected to the lower handle frame 120. The support seat 310 is rotatably mounted on the side of the second connecting seat 132 away from the first connecting seat 131, around the axis of rotation S1, and the locking mechanism 400 is provided between the second connecting seat 132 and the support seat 310.

[0048] In this embodiment, the second canopy bar 330 is connected to the first connecting seat 131. Therefore, when the first connecting seat 131 rotates relative to the second connecting seat 132, both the upper handle frame 110 and the second canopy bar 330 rotate relative to the lower handle frame 120 around the first pivot point Q1. In this embodiment, the first pivot point Q1 is coaxial with the rotation axis S1. The first connecting seat 131, the second connecting seat 132, and the support seat 310 can be understood as being pivotally attached to a single pivot. Of course, in other embodiments, the first pivot point Q1 may be offset from the rotation axis S1; this is not specifically limited here.

[0049] Referring to Figures 8 to 11, Figure 8 is an exploded view of the handle frame 100 of the cart 10 in the first embodiment of the present invention, Figure 9 is an enlarged view of the structure at circle A in Figure 8, Figure 10 is an enlarged view of the structure at circle B in Figure 9, and Figure 11 is an enlarged view of the structure at circle C in Figure 9.

[0050] Referring to Figures 8 and 9, in the first embodiment, the locking mechanism 400 includes an engaging projection 410 and an engaging recess 420. The engaging recess 420 is provided on one of the support seat 310 and the second connecting seat 132, and the engaging projection 410 is provided on the other for engagement with the engaging recess 420. When the engaging projection 410 is inserted into the engaging recess 420, the rotation of the support seat 310 relative to the second connecting seat 132 is restricted. When the engaging projection 410 disengages from the engaging recess 420, the rotation of the support seat 310 relative to the second connecting seat 132 is permitted. Specifically, in the two stages in which the upper handle frame 110 pivots relative to the lower handle frame 120, in the first stage, the upper handle frame 110 does not apply an external force to the first canopy bar 320, so that the engaging projection 410 remains inserted into the engaging recess 420, and the support seat 310 and the first canopy bar 320 are fixed relative to the second connecting seat 132 and the lower handle frame 120. In the second stage, the upper handle frame 110 applies an external force to the first canopy bar 320, and this external force drives the support seat 310 to rotate so that the engaging projection 410 can disengage from the engaging recess 420. In this stage, both the support seat 310 and the first canopy bar 320 can pivot relative to the second connecting seat 132 and the lower handle frame 120, and the first canopy bar 320 can rotate around the axis of rotation S1 to move away from or towards the lower handle frame 120.

[0051] Referring to Figures 9 to 11, in one embodiment, a plurality of engagement recesses 420 are provided, and the plurality of engagement recesses 420 are spaced apart along the circumferential direction of the rotation axis S1. In this embodiment, a plurality of engagement recesses 420 are provided on the support seat 310, and an engagement projection 410 is provided on the second connecting seat 132. In the first stage, the engagement projection 410 is maintained inserted into the current engagement recess 420. In the second stage, as the upper handle frame 110 is continuously rotated, the first canopy bar 320 continues to receive the external force applied by the upper handle frame 110, driving the support seat 310 to rotate around the rotation axis S1 relative to the second connecting seat 132. In this way, the engagement projection 410 can sequentially disengage from the current engagement recess 420 and be inserted into adjacent engagement recesses 420, so as to limit the continuous rotation of the support seat 310 relative to the second connecting seat 132. In other words, in the process of the upper handle frame 110 driving the first canopy bar 320 and support seat 310 to rotate (i.e., in the second stage), the engaging projection 410 sequentially disengages from one of the multiple engaging recesses 420 and then inserts into another adjacent engaging recess 420. For example, any three adjacent engaging recesses 420 can be selected and referred to as the first engaging recess 420a, the second engaging recess 420b, and the third engaging recess 420c, respectively, and they are arranged sequentially around the circumferential direction of the rotation axis S1. The engaging projection 410 disengages from the first engaging recess 420a and inserts into the second engaging recess 420b, and then disengages from the second engaging recess 420b and inserts into the third engaging recess 420c. In this way, the rotation process of the support seat 310 exhibits intermittent characteristics, and therefore the first canopy bar 320 can approach or move away from the lower handle frame 120 relatively slowly. In this way, during the process in which the canopy mechanism 300 is folded together with the handle frame 100, it is possible to avoid a violent collision between the first canopy bar 320 and the lower handle frame 120 when approaching the lower handle frame 120.This not only prevents problems such as wear and structural deformation from occurring in the canopy mechanism 300 and the lower handle frame 120, but also effectively extends the service life of the cart 10. "Continuous rotation" means that the process of the support seat 310 rotating around the rotation axis S1 relative to the second connecting seat 132 is carried out continuously without interruption. In this embodiment, by providing the locking mechanism 400, the support seat 310 can be rotated intermittently relative to the second connecting seat 132. In other words, the rotation of the support seat 310 relative to the second connecting seat 132 may stop or be intermittent due to the action of the locking mechanism 400. In this way, the canopy mechanism 300 can flexibly approach or come into contact with the handle frame 100 during the process of deployment or folding, thereby effectively reducing the impact force generated between them.

[0052] The engaging projection 410 may be, for example, a protruding structure or a raised structure, and the engaging recess 420 may be, for example, a groove structure or a through-hole structure. There are no specific limitations here. Specifically, in this embodiment, the engaging recess 420 is a groove structure.

[0053] In this embodiment, when the cart 10 is deployed and the canopy mechanism 300 is deployed, if the user needs to fold the canopy mechanism 300, the locking mechanism 400 can similarly restrict the continuous rotation of the support seat 310 relative to the second connecting seat 132, thereby mitigating the impact of the first canopy bar 320 on the upper handle frame 110. In specific operation, the user directly pushes or pulls the first canopy bar 320 in the direction approaching the second canopy bar 330. In this process, the engaging projection 410 similarly exhibits the characteristic of intermittent rotation of the support seat 310 by sequentially disengaging from one of the plurality of engaging recesses 420 and then inserting into an adjacent engaging recess 420. In this way, the first canopy bar 320 can approach the upper handle frame 110 relatively slowly, avoiding a violent impact with the upper handle frame 110. In this embodiment, the locking mechanism 400 can not only restrict the rotation of the support seat 310 relative to the second connecting seat 132, but also restrict its continuous rotation. On the other hand, in the process of folding the canopy mechanism 300 together with the cart 10, the canopy mechanism 300 (specifically the first canopy bar 320) can effectively avoid collision with the lower handle frame 120. On the other hand, when the cart 10 is in the deployed state, if the user individually switches the canopy mechanism 300 from the deployed state to the folded state, the canopy mechanism 300 (specifically the first canopy bar 320) can also avoid collision with the upper handle frame 110.

[0054] Continuing with reference to Figures 9 to 13, in one embodiment, a guide slope 421 is provided on the engaging recess 420 and / or a guide slope 411 is provided on the engaging projection 410. In other words, in this embodiment, the guide slope 421 may be provided only on the engaging recess 420, or the guide slope 411 may be provided only on the engaging projection 410, or the guide slope 421 may be provided on both the engaging recess 420 and the engaging projection 411. When the support seat 310 rotates relative to the second connecting seat 132, the engaging projection 410 pushes against the engaging recess 420 via the guide slope 421 and / or the guide slope 411, driving the support seat 310 to move away from the second connecting seat 132 along the axial direction of the rotation axis S1 (i.e., the second direction F2), thereby disengaging the engaging projection 410 from the engaging recess 420. Specifically, in this embodiment, as shown in Figure 10, a guide slope 421 is provided on the side wall of the engagement recess 420. More specifically, guide slopes 421 are provided on both of the two opposing side walls of the engagement recess 420 along the direction in which the support seat 310 rotates relative to the second connecting seat 132. In this way, when the support seat 310 rotates clockwise or counterclockwise relative to the second connecting seat 132 around the rotation axis S1, the engagement projection 410 can retract from the engagement recess 420 via the guide slope 421. Of course, in other embodiments, as shown in Figure 11, a guide slope 411 is provided on the engagement projection 410, and when the support seat 310 rotates relative to the second connecting seat 132, the guide slope 411 is pushed by the notch edge of the engagement recess 420, moving the support seat 310 away from the second connecting seat 132 (i.e., the second direction F2), and retracting the engagement projection 410 from the engagement recess 420.

[0055] Referring to Figures 10 to 13, in one embodiment, the position of the support seat 310 when the engaging projection 410 is inserted into the engaging recess 420 is referred to as the first position. Due to the pushing action between the guide slope 421 and the engaging projection 410, the support seat 310 can move along the second direction F2 while rotating relative to the second connecting seat 132, and the engaging projection 410 can be withdrawn from the engaging recess 420. The position of the support seat 310 at this time is referred to as the second position. In other words, when the support seat 310 rotates relative to the second connecting seat 132, it can move along the axial direction of the rotation axis S1 and has a first position (see Figure 12) and a second position (see Figure 13). Specifically, when the support seat 310 is in the first position, the engaging projection 410 is inserted into the engaging recess 420 and the support seat 310 and the second connecting seat 132 are bonded together. When the support seat 310 is in the second position, the engaging projection 410 disengages from the engaging recess 420, and the engaging projection 410 presses against the support seat 310, creating a pushing gap 610 between the support seat 310 and the second connecting seat 132. The width H1 of the pushing gap 610 along the axial direction of the rotation axis S1 is equal to the length L1 of the engaging projection 410. When the support seat 310 rotates relative to the second connecting seat 132, the engaging projection 410 can retract from the engaging recess 420 by contacting the guide slope 421, driving the support seat 310 to switch from the first position to the second position. As described above, in the process of unfolding or folding, when the upper handle frame 110 pivots relative to the lower handle frame 120, the upper handle frame 110 applies an external force to the first canopy bar 320, causing the second canopy bar 320 to tend to rotate around the rotation axis S1. Since the first canopy bar 320 is connected to the support seat 310, the support seat 310 synchronously exhibits a tendency to rotate around the axis of rotation S1. If the upper handle frame 110 applies an external force to the first canopy bar 320 that is greater than the force required for the engaging projection 410 to push the guide slope 421 away from the engaging recess 420, the support seat 310 rotates relative to the second connecting seat 132. Alternatively, when the cart 10 is in the deployed state, the user applies an external force directly to the first canopy bar 320 when it is necessary to switch the state of the canopy mechanism 300.Similarly, the external force allows the first canopy bar 320 and the support seat 310 to rotate synchronously with respect to the second connecting seat 132 around the rotation axis S1. Referring to Figures 9, 12, and 13, in one embodiment, the handle frame 100 further includes a cover body 140 and a first elastic member 150. The cover body 140 is provided on the side of the support seat 310 away from the second connecting seat 132 and is connected to the second connecting seat 132. Specifically, a movable gap 620 is provided between the cover body 140 and the support seat 310 for the support seat 310 to move along the axial direction of the rotation axis S1. The movable gap 620 is to ensure that the support seat 310 can move along the axial direction of the rotation axis S1, and specifically, the movable gap 620 provides the necessary travel stroke for the support seat 310 to move from a first position to a second position. Specifically, when the support seat 310 is switched from the first position to the second position, the pushing gap 610 between the support seat 310 and the second connecting seat 132 gradually increases, and the movable gap 620 between the support seat 310 and the cover body 140 gradually decreases. Furthermore, the increase in the width of the pushing gap 610 is equal to the decrease in the width of the movable gap 620. In this embodiment, the width H2 of the movable gap 620 along the axial direction of the rotation axis S1 is greater than the width H1 of the pushing gap 610. The first elastic member 150 may be an elastic member such as a spring or an elastic piece. The first elastic member 150 is positioned within the movable gap 620 and contacts the cover body 140 and the support seat 310 to hold the support seat 310 in the first position. Specifically, as the support seat 310 rotates relative to the second connecting seat 132, if the engaging projection 410 retracts from one of the engaging recesses 420 via the guide slope 421, the support seat 310 is in the second position, and the first elastic member 150 is compressed and deformed, accumulating elastic potential energy. By continuing to rotate the support seat 310, when the engaging projection 410 comes into contact with the region between two adjacent engaging recesses 420, the support seat 310 remains held in the second position. When the support seat 310 rotates until the engaging projection 410 faces another adjacent engaging recess 420, the first elastic member 150 returns to its original position, automatically switching the support seat 310 from the second position to the first position and reinserting the engaging projection 410 into the other engaging recess 420.If we define the direction in which the support seat 310 moves from the second position to the first position as the third direction F3, then both the third direction F3 and the second direction F2 are parallel to the axial direction of the rotation axis S1, and their directions are opposite. Specifically, in this embodiment, the second direction F2 refers to the outside of the cart 10 (away from the center of the cart 10), and the third direction F3 refers to the inside of the cart 10 (approaching the center of the cart 10).

[0056] Referring to Figure 7, in one embodiment, the number of engaging protrusions 410 is not limited to one, but may be multiple, for example, two, three, etc. In this embodiment, there are two engaging protrusions 410, and these two engaging protrusions 410 are provided facing each other in the circumferential direction of the rotation axis S1. When the support seat 310 is in the first position, the two engaging protrusions 410 are simultaneously inserted into the two engaging recesses 420 to achieve a recess-recessed fitting. For convenience of explanation, the two engaging recesses 420 are referred to as a pair of engaging recesses 420. When the support seat 310 rotates relative to the second connecting seat 132, the two engaging protrusions 410 retract from the corresponding pair of engaging recesses 420 and are inserted into another adjacent pair of engaging recesses 420. By arranging multiple engaging protrusions 410 to simultaneously engage with multiple engaging recesses 420, the reliability when the support seat 310 rotates intermittently relative to the second connecting seat 132 can be improved.

[0057] Referring to Figures 9 to 11, in one embodiment, a position-restricting rib 1321 is further provided on one of the support seat 310 and the second connecting seat 132, and a position-restricting groove 311 is provided on the other. The position-restricting groove 311 has an arc-shaped structure, and the center of the arc of the position-restricting groove 311 is provided coaxially with the rotation axis S1. The position-restricting rib 1321 can be inserted into the position-restricting groove 311 along a direction parallel to the rotation axis S1. Specifically, the protrusion length L2 of the position-restricting rib 1321 along the direction parallel to the rotation axis S1 is smaller than the protrusion length L1 of the engaging projection 410 along the direction parallel to the rotation axis S1. Therefore, when the engaging projection 410 disengages from the engaging recess 420, that is, when the support seat 310 is in the second position, the position-restricting rib 1321 disengages from the position-restricting groove 311. Thus, as shown in Figures 14 to 16, during the rotation of the support seat 310 relative to the second connecting seat 132, the position limiting rib 1321 does not interfere with the rotational movement and does not limit the rotational range of the support seat 310. Therefore, in this embodiment, the arc length of the position limiting groove 311 does not need to be specifically limited, and of course, the angle of the central angle corresponding to the position limiting groove 311 does not need to be specifically limited and may be large or small. In this embodiment, the position limiting rib 1321 is provided on the second connecting seat 132, and the position limiting groove 311 is provided on the support seat 310. As an alternative, in other embodiments, the position limiting groove 311 and the position limiting rib 1321 may be omitted.

[0058] The following briefly explains the operation and principle of the Canopy Mechanism 300, with reference to the diagrams.

[0059] Referring to Figure 1, when the cart 10 is deployed and the canopy mechanism 300 is deployed, the canvas 350 can provide effective shielding and protection to the passenger space below. In this case, if the user only needs to perform a folding operation on the canopy mechanism 300 (switching from the state in Figure 1 to the state in Figure 5), the user pushes or pulls the first canopy bar 320 clockwise. In this case, the first canopy bar 320, along with the support seat 310, rotates clockwise around the axis of rotation S1 relative to the second connecting seat 132. In this process, referring to Figures 9 to 11, the engaging projection 410 can disengage from the first engaging recess 420 via the guide slope 421, and then, as the support seat 310 continues to rotate clockwise, the engaging projection 410 sequentially temporarily engages with subsequent engaging recesses 420 until the first canopy bar 320 comes into contact with the second canopy bar 330 or the upper handle frame 110, and then quickly disengages from that recess 420 to enter the next engagement cycle. In this process, the support seat 310 is switched back and forth between the first and second positions. When the first canopy bar 320 comes into contact with the second canopy bar 330, the canopy mechanism 300 is in the folded state and the support seat 310 is maintained in the first position. Furthermore, this alternating mechanism of continuous disengagement and engagement results in the first canopy bar 320 exhibiting intermittent stopping characteristics as it gradually approaches the second canopy bar 330 and the upper handle frame 110. This indicates that the first canopy mechanism 300 exhibits indexing motion characteristics during the state switching process.

[0060] When the cart 10 is in the deployed state and the canopy mechanism 300 is in the folded state, if the user needs to perform an deployment operation on the canopy mechanism 300 (switching from the state in Figure 5 to the state in Figure 1), the user pushes or pulls the first canopy bar 320 counterclockwise. In this case, the first canopy bar 320 rotates the support seat 310 counterclockwise around the rotation axis S1 relative to the second connecting seat 132. Similarly, in this process, the engaging projection 410 can disengage from the engaging recess 420 that it initially engaged with via the guide slope 421, and thereafter, as the support seat 310 continues to rotate counterclockwise, the engaging projection 410 will sequentially temporarily engage with subsequent engaging recesses 420 until the canopy mechanism 300 is deployed, then quickly disengage from that engaging recess 420 and enter the next engagement cycle. Similarly, in this process, the support seat 310 is switched back and forth between the first and second positions. When the canopy mechanism 300 is deployed, the support seat 310 is maintained in the first position. Similarly, this alternating mechanism of continuous disengagement and engagement results in the first canopy bar 320 exhibiting intermittent stopping characteristics as it approaches or moves away from the second canopy bar 330 and the upper handle frame 110. This indicates that the first canopy mechanism 300 exhibits indexing motion characteristics during the state switching process.

[0061] Referring to Figure 1, when the cart 10 is in the deployed state and the canopy mechanism 300 is in the deployed state, if the user needs to perform a folding operation on the cart 10 (sequentially switching from the state in Figure 1 to the state in Figure 2, the state in Figure 3, and the state in Figure 4), first the upper handle frame 110 is rotated counterclockwise so that the upper handle frame 110 can fit against the lower handle frame 120 around the first pivot joint 130. Referring to Figures 8 and 9, in the first stage in which the first connecting seat 131 rotates relative to the second connecting seat 132, the first canopy bar 320 and the support seat 310 are fixed relative to the second connecting seat 132. At this time, the second canopy bar 330 is positioned on the first connecting seat 131 together with the upper handle frame 110, so when the upper handle frame 110 rotates relative to the second connecting seat 132 via the first connecting seat 131, the second canopy bar 330 rotates with the upper handle frame 110 along with the first connecting seat 131, gradually approaching the first canopy bar 320. As the distance between the second canopy bar 330 and the first canopy bar 320 decreases, the canvas 350 gradually loses tension and loosens, eventually folding between the first canopy bar 320 and the second canopy bar 330. When the canopy mechanism 300 is in the folded state (see Figure 3, which shows a schematic configuration when the canopy mechanism 300 is close to the folded state), if the upper handle frame 110 is continued to rotate counterclockwise (i.e., in the second stage), the thrust action causes the upper handle frame 110 to push the first canopy bar 320 so that it rotates counterclockwise around the rotation axis S1 relative to the second connecting seat 132. At the same time, the first canopy bar 320, along with the support seat 310, rotates counterclockwise around the rotation axis S1 relative to the second connecting seat 132.Similarly, in this process, the engaging projection 410 can disengage from the engaging recess 420 that it initially engaged with via the guide slope 421. Subsequently, as the support seat 310 rotates counterclockwise, the engaging projection 410 sequentially temporarily engages with subsequent engaging recesses 420 until the first canopy bar 320 moves closer to the lower handle frame 120 and the upper handle frame 110 is fully folded relative to the lower handle frame 120. After engaging with the recess 420, it quickly disengages from it and enters the next engagement cycle. This continuous alternating disengagement and engagement phenomenon exhibits intermittent stopping characteristics even as the first canopy bar 320 gradually approaches the lower handle frame 120.

[0062] Referring to Figure 4, when the cart 10 is in a folded state and the canopy mechanism 300 is in a folded state, if the user needs to perform an unfolding operation on the cart 10 (switching from the state in Figure 4 to the state in Figure 1), the user pulls the upper handle frame 110, causing the upper handle frame 110 to pivot away from the lower handle frame 120 around the first pivot joint 130. Referring to Figures 8 and 9, in the first stage in which the first connecting seat 131 rotates relative to the second connecting seat 132, the support seat 310 and the first canopy bar 320 are also first fixed relative to the second connecting seat 132. At this time, the second canopy bar 330 is positioned on the first connecting seat 131 together with the upper handle frame 110. As the upper handle frame 110 rotates relative to the second connecting seat 132 via the first connecting seat 131, the second canopy bar 330 rotates with the upper handle frame 110 along with the first connecting seat 131, gradually moving away from the first canopy bar 320. As the distance between the second canopy bar 330 and the first canopy bar 320 increases, the original loose canvas 350 is pulled taut by the tensile force and eventually spreads out completely between the second canopy bar 330 and the first canopy bar 320, forming an effective shielding structure. When the canopy mechanism 300 is deployed, if the upper handle frame 110 is continuously rotated clockwise (i.e., in the second stage), the interlocking action of the canvas 350 causes the first canopy bar 320 and support seat 310 to rotate clockwise around the axis of rotation S1 relative to the second connecting seat 132 until the upper handle frame 110 and the lower handle frame 120 are fully deployed. Similarly, in this rotation process, the rotation of the first canopy bar 320 along with the support seat 310 is not continuously smooth, but exhibits intermittent stopping characteristics.

[0063] Referring to Figures 9 and 17, in one embodiment, the first pivot joint 130 further includes a locking member 133 that is axially movable between a first connecting seat 131 and a second connecting seat 132, and that restricts or allows relative pivoting between them. In this embodiment, the side of the first connecting seat 131 facing the second connecting seat 132 is provided with a first chamber 1311 and a first locking groove 1312 provided within the first chamber 1311. The side of the second connecting seat 132 facing the first connecting seat 131 is provided with a second chamber 1323 and a second locking groove (not shown) provided within the second chamber 1323. The locking member 133 has a gear structure and has locking teeth 1331. The locking member 133 is axially movable between the first chamber 1311 and the second chamber 1323 and has a locked position and an unlocked position. When the locking member 133 is in the locked position, one end of the locking member 133, along its axial direction, is located in the first chamber 1311, and the other end is located in the second chamber 1323. In this way, the locking teeth 1331 on the outside of the locking member 133 engage simultaneously with the first locking groove 1312 and the second locking groove along its axial direction to restrict the first connecting seat 131 from pivoting relative to the second connecting seat 132. When the locking member 133 is in the unlocked position, the locking member 133 can move completely into the first chamber 1311 or the second chamber 1323, and the locking teeth 1331 retract correspondingly from the second locking groove or the first locking groove 1312 to allow the first connecting seat 131 to pivot relative to the second connecting seat 132. In this embodiment, when the locking member 133 is in the unlocked position, the locking teeth 1331 of the locking member 133 retract from the first locking groove 1312, moving the locking member 133 completely into the second chamber 1323. Based on this, if the cart 10 needs to be folded, the user must first unlock the first pivot joint 130 in order to move the locking member 133 completely into the second chamber 1323.

[0064] Continuing with reference to Figures 9 and 17, in one embodiment, the first pivot joint 130 further includes a drive member 134 rotatably provided in the axial direction between the first connecting seat 131 and the locking member 133. Specifically, the locking member 133 is provided with a drive unit 1332, and the drive member 134 is provided with a drive inclined surface (not shown), the drive inclined surface extending inclined along the circumferential direction of the drive member 134 and contacting the drive unit 1332 in the axial direction. When the drive member 134 rotates, the drive member 134 pushes the drive unit 1332 via the drive inclined surface, causing the locking member 133 to move from the locked position to the unlocked position in the axial direction.

[0065] Referring to Figures 8 and 9, in one embodiment, the cart 10 further has an unlocking mechanism 900, which can be driven-engaged with a drive member 134 in the first pivot joint 130. When the unlocking mechanism 900 is operated, the drive member 134 is driven to rotate, and the lock member 133 is driven to move to the unlocked position.

[0066] A second embodiment of the present invention provides another cart 10, which, like the first embodiment, includes a handle frame 100, a wheel frame 200, a canopy mechanism 300, a locking mechanism 400, and the like. The cart 10 of this embodiment can be considered a modified version of the cart 10 of the first embodiment described above. However, as long as there is no contradiction, the structure of the components in this embodiment and the connections between the components can be described in the description of the first embodiment described above. Therefore, when referring to the structure of the components and connections, etc., similar to those in the first embodiment in this embodiment, the corresponding drawings of the first embodiment can be referred to. The following description will focus on the differences between this embodiment and the first embodiment.

[0067] This embodiment differs from the first embodiment described above in at least the following respects.

[0068] In this embodiment, the configuration of the locking mechanism 400 differs slightly from that of the locking mechanism 400 shown in the first embodiment, and the configuration of the support seat 310 also differs slightly from that of the support seat 310 shown in the first embodiment. Specifically, the second connecting seat 132 is also provided with a position limiting rib 1321, and the support seat 310 is also provided with a position limiting groove 311. However, in this embodiment, referring to Figure 11, the protruding length L2 of the position limiting rib 1321 along the direction parallel to the rotation axis S1 is greater than the protruding length L1 of the engaging projection 410 along the direction parallel to the rotation axis S1. Therefore, regardless of whether the support seat 310 is in the first position or the second position, that is, regardless of whether the engaging projection 410 is inserted into or disengaged from the engaging recess 420, the position limiting rib 1321 is inserted into the position limiting groove 311 along the direction parallel to the rotation axis S1. Thus, the two ends of the position limiting groove 311 (referred to as the first end 3111 and the second end 3112, respectively) limit the rotational stroke of the support seat 310 relative to the second connecting seat 132. In other words, the angle of the central angle α0 corresponding to the position limiting groove 311 defines the range of rotation of the support seat 310 relative to the second connecting seat 132. As shown in Figure 19, when the support seat 310 rotates clockwise relative to the second connecting seat 132, and the position limiting rib 1321 is positioned at the first end 3111 of the position limiting groove 311, the support seat 310 cannot be rotated further clockwise. Similarly, when the support seat 310 rotates counterclockwise relative to the second connecting seat 132, and the position limiting rib 1321 is positioned at the second end 3112 of the position limiting groove 311, the support seat 310 cannot be rotated further counterclockwise.

[0069] Referring to Figures 18 and 19, in one embodiment, the dimension of the position limiting groove 311 along the rotation axis S1 in the circumferential direction is larger than the dimension of the position limiting groove 311 along the rotation axis S1 in the first embodiment. In this embodiment, the central angle α0 corresponding to the position limiting groove 311 is approximately 180°. When the cart 10 is in the deployed state and the canopy mechanism 300 is in the deployed state, the position limiting rib 1321 is located in the center of the position limiting groove 311 along the arc length direction of the position limiting groove 311. When the first canopy bar 320 and the upper handle frame 110 are close to each other and the canopy mechanism 300 is in the folded state, the position limiting rib 1321 is located at the first end 3111 of the position limiting groove 311. As the cart 10 is folded, the canopy mechanism 300 is synchronously folded along with it and aligns with the lower handle frame 120, after which the position limiting rib 1321 is positioned at the second end 3112 of the position limiting groove 311. Of course, in other embodiments, the central angle α0 corresponding to the position limiting groove 311 may be greater than or less than 180° and is not specifically limited thereto.

[0070] Referring to Figure 18, in one embodiment, the support seat 310 and the second connecting seat 132 that have an engaging recess 420 are further provided with a locking recess 460. The locking recess 460 can lock and engage with the engaging projection 410. Specifically, in this embodiment, the second connecting seat 132 is provided with two locking recesses 460, the two locking recesses 460 are arranged opposite each other along the circumferential direction of the rotation axis S1, and the two locking recesses 460 are arranged opposite each other at the first end 3111 and the second end 3112 of the position limiting groove 311 along the radial direction of the rotation axis S1. As shown in Figures 18 and 19, when the handle frame 100 remains extended, and the canopy mechanism 300 is folded by rotating the first canopy bar 320 toward the upper handle frame 110, the position limiting rib 1321 is positioned just at the first end 3111 of the position limiting groove 311, and the two engaging protrusions 410 are locked and engaged just at the two locking recesses 460, thereby ensuring that the canopy mechanism 300 is securely held in the folded state. When the canopy mechanism 300 is folded synchronously with the folding of the cart 10, the position limiting rib 1321 is positioned just at the second end 3112 of the position limiting groove 311, and the two engaging protrusions 410 are also locked and engaged with the two locking recesses 460, thereby ensuring that the canopy mechanism 300 is securely held in the folded state. Specifically, the dimensions of the lock recess 460 along the circumferential direction of the rotation axis S1 differ from the dimensions of the engaging recess 420 along the circumferential direction of the rotation axis S1. More specifically, the dimensions of the lock recess 460 along the circumferential direction of the rotation axis S1 are larger than the dimensions of the engaging recess 420 along the circumferential direction of the rotation axis S1. In this way, the engaging projection 410 is completely housed within the lock recess 460, so that when the canopy mechanism 300 is in the folded state, the support seat 310 and the second connecting seat 132 can be tightly fitted together, and there is no pushing gap 610 between them, thus preventing foreign objects from entering the pushing gap 610. At the same time, it is possible to ensure that the engaging projection 410 is stably inserted into the lock recess 460 and improve the stability of the canopy mechanism 300 when it is in the folded state.

[0071] Referring to Figure 18, in one embodiment, a sliding slope 461 is provided on the lock recess 460 and / or a sliding slope 412 is provided on the engaging projection 410. In other words, in this embodiment, the sliding slope 461 may be provided only on the lock recess 460, or the sliding slope 412 may be provided only on the engaging projection 410, or the sliding slope 461 may be provided on the lock recess 460 and the sliding slope 412 may be provided on the engaging projection 410. When the support seat 310 rotates relative to the second connecting seat 132, the engaging projection 410 pushes against the lock recess 460 via the sliding slope 461 and / or the sliding slope 412, causing the engaging projection 410 to disengage from the lock recess 460. Specifically, in this embodiment, the sliding slope 461 is provided on the side wall of the lock recess 460. When the support seat 310 rotates relative to the second connecting seat 132, the engaging projection 410 can retract from the locking recess 460 via the sliding slope 461.

[0072] Furthermore, the support seat 310 in the first embodiment may be provided with a locking recess 460, and is not specifically limited thereto.

[0073] A third embodiment of the present invention provides another cart 10, which, like the first embodiment, includes a handle frame 100, a wheel frame 200, a canopy mechanism 300, a locking mechanism 400, and the like. The cart 10 of this embodiment can be considered a modified version of the cart 10 of the first embodiment described above, and, unless otherwise inconsistent, the structure of the components and the connections between the components in this embodiment can be described by referring to the description of the first embodiment above. The differences between this embodiment and the first embodiment described above will be mainly described below.

[0074] This embodiment differs from the first embodiment described above in at least the following respects.

[0075] In this embodiment, the configuration of the locking mechanism 400 differs from that of the locking mechanism 400 in the first embodiment, and the configuration of the second connecting seat 132 also differs from that of the second connecting seat 132 in the first embodiment. Specifically, referring to Figure 20, in this embodiment, the locking mechanism 400 includes a bracket 440, an engaging projection 410, and a plurality of engaging recesses 420. The bracket 440 is provided between the second connecting seat 132 and the support seat 310 so as to be movable along the axial direction of the rotation axis S1, and rotation of the bracket 440 relative to the second connecting seat 132 is restricted. One of the support seat 310 and the bracket 440 is provided with an engaging recess 420, and the other is provided with an engaging projection 410. Similarly, when the engaging projection 410 is inserted into the engaging recess 420, rotation of the support seat 310 relative to the second connecting seat 132 is restricted. When the engaging projection 410 disengages from the engaging recess 420, rotation of the support seat 310 relative to the second connecting seat 132 is permitted.

[0076] Similarly, in this embodiment, as shown in Figure 20, a plurality of engagement recesses 420 are provided, and the plurality of engagement recesses 420 are spaced apart along the circumferential direction of the rotation axis S1. In the first stage, when the upper handle frame 110 rotates relative to the lower handle frame 120, the engagement projection 410 is maintained inserted into the current engagement recess 420. In the second stage, similarly, the engagement projection 410 can sequentially disengage from the current engagement recess 420 and be inserted into adjacent engagement recesses 420 in order to restrict continuous rotation of the support seat 310 relative to the second connecting seat 132.

[0077] Continuing with Figure 20, in one embodiment, a position-restricting projection 441 is provided on one of the second connecting seat 132 and the bracket 440, and a position-restricting recess 1322 is provided on the other, with the position-restricting projection 441 engaging with the position-restricting recess 1322. This restricts the bracket 440 from rotating relative to the second connecting seat 132. In one embodiment, at least one position-restricting projection 441 is provided, and the number of position-restricting projections 441 is the same as the number of position-restricting recesses 1322. When multiple position-restricting projections 441 are provided, the multiple position-restricting projections 441 are spaced apart in the circumferential direction of the rotation axis S1. In this way, the rotational constraint between the bracket 440 and the second connecting seat 132 can be strengthened. Specifically, in this embodiment, the bracket 440 is provided between the support seat 310 and the second connecting seat 132, and the three components, the bracket 440, the second connecting seat 132, and the support seat 310, are provided coaxially. In this embodiment, the support seat 310 is provided with a plurality of engagement recesses 420, the bracket 440 is provided with an engagement projection 410 and a position-restricting projection 441, and the second connecting seat 132 is provided with a position-restricting recess 1322.

[0078] Referring to Figures 20 and 21, in one embodiment, the bracket 440 has a third position and a fourth position between the support seat 310 and the second connecting seat 132. The second connecting seat 132 is further provided with a positioning recess 450. When the bracket 440 is in the third position, the engaging projection 410 engages simultaneously with the engaging recess 420 and the positioning recess 450, further restricting the rotation of the support seat 310 relative to the second connecting seat 132. When the bracket 440 is in the fourth position, the engaging projection 410 engages with the positioning recess 450 and disengages from the engaging recess 420, thereby allowing the support seat 310 to rotate relative to the second connecting seat 132. Similarly, in this embodiment, the engaging recess 420 is provided with a guide slope 421, and / or the engaging projection 410 is provided with a guide slope 411. Therefore, when the support seat 310 rotates relative to the second connecting seat 132, the engaging projection 410 can push against the engaging recess 420 via the guide slope 421 and / or guide slope 411, thereby automatically switching the bracket 440 from the third position to the fourth position.

[0079] In other embodiments, if the bracket 440 is in the third position, the engaging projection 410 may be engaged with the engaging recess 420 and the positioning recess 450 simultaneously, and the position limiting projection 441 and the position limiting recess 1322 may be omitted. This restricts the bracket 440 from rotating relative to the second connecting seat 132. Of course, in other embodiments, if the position limiting projection 441 and the position limiting recess 1322 are retained, when the bracket 440 is in the third position, the engaging projection 410 may not engage with the positioning recess 450, but only with the engaging recess 420. In this way, the bracket 440 can still be restricted from rotating around the second connecting seat 132.

[0080] Continuing with reference to Figures 20 and 21, in one embodiment, a second elastic member 800 is provided between the bracket 440 and the second connecting seat 132. The second elastic member 800 may be an elastic member such as a spring or an elastic piece, and specifically, it abuts between the bracket 440 and the second connecting seat 132 so as to hold the bracket 440 in a third position. As the support seat 310 rotates relative to the second connecting seat 132, when the engaging projection 410 retracts from one of the engaging recesses 420 via the guide slope 421, the bracket 440 is in a fourth position, and the second elastic member 800 is compressed and deformed to store elastic potential energy. As the support seat 310 continues to rotate, when the engaging projection 410 abuts against the region between two adjacent engaging recesses 420, the bracket 440 remains held in the fourth position. When the support seat 310 rotates until the engaging projection 410 faces another adjacent engaging recess 420, the second elastic member 800 returns to its original position, automatically switching the bracket 440 from the fourth position to the third position and reinserting the engaging projection 410 into the other engaging recess 420.

[0081] In this embodiment, when the support seat 310 rotates relative to the second connecting seat 132, the two always remain relatively fixed along the axial direction of the rotation axis S1. By preventing a gap from forming between the support seat 310 and the second connecting seat 132 due to rotation, impurities and the like can be effectively prevented from unexpectedly falling between the support seat 310 and the second connecting seat 132. This not only avoids adverse effects on the reliability of the rotation of the support seat 310 but is also advantageous in extending the service life of the support seat 310.

[0082] A fourth embodiment of the present invention provides another cart 10, which, like the third embodiment, includes a handle frame 100, a wheel frame 200, a canopy mechanism 300, a locking mechanism 400, and the like. The cart 10 of this embodiment can be considered a modified version of the cart 10 of the third embodiment described above, and the structure of the components and the connection relationships between the components in this embodiment can be described by referring to the description of the third embodiment described above. The differences between this embodiment and the third embodiment described above will be mainly described below.

[0083] This embodiment differs from the third embodiment described above in at least the following respects.

[0084] In this embodiment, some components of the handle frame 100 differ from those of the handle frame 100 in the third embodiment described above. Specifically, in this embodiment, the handle frame 100 further includes a locking mechanism 700. This locking mechanism 700 can stably hold the handle frame 100 in a folded state.

[0085] Referring to Figures 22 and 23, in one embodiment, the first connecting seat 131 includes a connected first pivot 131a and a first connecting part 131b, the first connecting part 131b being a strip-shaped tubular structure. The upper handle frame 110 is a U-shaped tubular structure, the first connecting part 131b is fitted outside the tubular body of the upper handle frame 110 and connected to the upper handle frame 110, and the lumen of the first connecting part 131b communicates with the lumen of the upper handle frame 110. The second connecting seat 132 includes a connected second pivot 132a and a second connecting part 132b, the second connecting part 132b being connected to the lower handle frame 120. The second pivot 132a and the first pivot 131a rotate around the first pivot point Q1.

[0086] Referring to Figures 23 to 26, in one embodiment, the locking mechanism 700 includes a retaining member 710 and a retaining recess 720. One of the retaining member 710 and the retaining recess 720 is provided on the upper handle frame 110, and the other of the retaining member 710 and the retaining recess 720 is provided on the second connecting seat 132. Specifically, in this embodiment, the retaining member 710 is movably provided within the upper handle frame 110 and has a locked position and an unlocked position. The retaining recess 720 is provided on the outer circumference of the second pivot portion 132a of the second connecting seat 132. In this embodiment, the position of the upper handle frame 110 when the upper handle frame 110 and the lower handle frame 120 are kept in a relatively folded state is referred to as the folded position. Specifically, when the upper handle frame 110 is in the folded position, the retaining member 710 and the retaining recess 720 are provided facing each other. The retaining member 710 moves to the locked position and is inserted into the retaining recess 720, thereby restricting the first connecting seat 131 from rotating relative to the second connecting seat 132, and further restricting the upper handle frame 110 from rotating relative to the lower handle frame 120, so that the upper handle frame 110 and the lower handle frame 120 are held in a relatively folded state.

[0087] Continuing with reference to Figures 23 to 26, in one embodiment, the locking mechanism 700 further includes a third elastic member 730, which may be an elastic member such as a spring or an elastic piece, and is provided within the upper handle frame 110 and contacts the retaining member 710 to hold the retaining member 710 in the locked position. When the upper handle frame 110 is in any position other than the folded position, the retaining member 710 contacts the outer peripheral wall of the second pivot portion 132a, causing the third elastic member 730 to be compressed and deformed, accumulating elastic potential energy. When the upper handle frame 110 rotates to the folded position, the retaining member 710 and the retaining recess 720 automatically return to their original positions relative to the third elastic member 730, pushing the retaining member 710 and automatically inserting it into the retaining recess 720. Specifically, in this embodiment, the locking mechanism 700 further includes a mounting frame 740, which is provided on the upper handle frame 110, and the retaining member 710 is movably mounted on the mounting frame 740 so as to be switchable between a locked position and an unlocked position. Specifically, the third elastic member 730 abuts against the retaining member 710 and the mounting frame 740. In other embodiments, the mounting frame 740 may omit the third elastic member 730 directly abutting against the retaining member 710 and the internal wall or internal protrusion (not shown) of the upper handle frame 110, and is not specifically limited here.

[0088] Referring to Figures 23 and 24, in one embodiment, a guide slope 721 is formed on the side wall of the retaining recess 720 to guide the retaining member 710 out of the retaining recess 720 when the upper handle frame 110 pivots relative to the lower handle frame 120 and extends.

[0089] Referring to Figure 26, in this embodiment, the first pivot joint 130 further includes a fourth elastic member 135 and a fixed member 136. The fixed member 136 is provided on the side of the first connecting seat 131 away from the second connecting seat 132 and is fixedly connected to the second connecting seat 132. In this way, axial separation of the first connecting seat 131 and the second connecting seat 132 during the pivoting process can be restricted. Specifically, the fourth elastic member 135 may be, for example, a torsion spring, which abuts between the fixed member 136 and the first connecting seat 131. When the upper handle frame 110 is in the folded position, the torsion spring is in its natural state. When the upper handle frame 110 pivots relative to the lower handle frame 120 and unfolds, the torsion spring is in a twisted state. Therefore, when the locking member 133 is in the unlocked position (for example, when the cart 10 is in the unfolded state), the upper handle frame 110 is pivotable relative to the lower handle frame 120. At this time, the torsion spring is reset and driven to rotate the first connecting seat 131 relative to the second connecting seat 132, causing the upper handle frame 110 to tend to pivot toward the lower handle frame 120, thereby making it easier for the upper handle frame 110 to pivot relative to the lower handle frame 120 and be folded. In other embodiments, the fourth elastic member 135 and the fixing member 136 may be omitted, and are not specifically limited here.

[0090] Furthermore, a locking mechanism 700 may be provided in the handle frame 100 in the first and second embodiments described above. Also, the first pivot joint 130 in the first and second embodiments described above may include a fourth elastic member 135 and a fixing member 136, but is not specifically limited thereto.

[0091] A fifth embodiment of the present invention provides another cart 10, which, like the fourth embodiment, includes a handle frame 100, a wheel frame 200, a canopy mechanism 300, a locking mechanism 400, and a locking mechanism 700. The cart 10 of this embodiment can be considered a modified version of the cart 10 of the fourth embodiment described above, and the structure of the components and the connections between the components in this embodiment can be described by referring to the description of the fourth embodiment described above. Below, the differences between this embodiment and the fourth embodiment described above will be mainly explained.

[0092] This embodiment differs from the fourth embodiment described above in at least the following respects.

[0093] In this embodiment, some configurations and arrangement positions of the locking mechanism 700 differ from those of the locking mechanism 700 in the fourth embodiment described above. Referring to Figures 27 and 28, in this embodiment, the retaining member 710 is movably provided on the first pivot portion 131a of the first connecting seat 131, and a retaining recess 720 is provided inside the second pivot portion 132a of the second connecting seat 132. Specifically, the retaining member 710 is movably provided on the side of the first pivot portion 131a facing the second pivot portion 132a, the retaining recess 720 is provided on the side of the second pivot portion 132a facing the first pivot portion 131a, and the third elastic member 730 abuts between the retaining member 720 and the first pivot portion 131a. As the upper handle frame 110 and the lower handle frame 120 continue to unfold relative to each other, the retaining member 720 comes into contact with the first pivot portion 131a and the second pivot portion 132a, and is held in the unlocked position, while the third elastic member 730 is held in a compressed state. Referring to Figures 29 and 30, when the upper handle frame 110 rotates to the folded position relative to the second connecting seat 132 along with the first connecting seat 131, the retaining member 710 and the retaining recess 720 face each other, and the retaining member 710 is pressed to the locked position by the restoring force of the third elastic member 730 and inserted into the retaining recess 720. As a result, the upper handle frame 110 and the lower handle frame 120 are locked, and the upper handle frame 110 is restricted from pivoting and unfolding relative to the lower handle frame 120. In this embodiment, by providing the locking mechanism 700 inside the first pivot joint 130, the stability of the retaining member 710 being locked in the retaining recess 720 can be improved. Furthermore, the problem of the retaining member 710 wearing outwards from the first pivot joint 130 (specifically, the second pivot portion 132a) can be improved.

[0094] In one embodiment, referring to Figure 27, the retaining member 710 has a U-shaped structure and includes a first rod 711, a second rod 712, and a third rod 713 connected in sequence. The second rod 711 is provided with a locking head 714 for insertion into and removal from a retaining recess 720. When the retaining member 710 is in the locked position, the locking head 714 is inserted into the retaining recess 720. When the retaining member 710 is in the unlocked position, the locking head 714 retracts from the retaining recess 720. Referring to Figures 27, 28, and 30, a movable passage 131c is provided in the first pivot portion 131a, and the movable passage 131c extends toward the second pivot portion 132a. The retaining member 710 is movable within the movable passage 131c and can be switched between the locked position and the unlocked position. Specifically, position-restricting steps 1311c are formed on the side wall of the movable passage 131c. The end of the first rod 711 away from the second rod 712 and the end of the third rod 713 away from the second rod 712 are both bent outward to form a gripping portion 715. When the retaining member 710 is in the unlocked position, there is a gap between the gripping portion 715 and the position-restricting step 1311c. When the retaining member 710 is in the locked position, the position-restricting step 1311c is designed to contact the gripping portion 715 and restrict its position.

[0095] In this embodiment, the first pivot joint 130 may include a fourth elastic member 135 and a fixed member 136. Of course, both may be omitted and are not specifically limited here.

[0096] The cart 10 in the above embodiment provides the following technical effects.

[0097] This invention provides a mechanical link between the deformation of the cart 10 and the operation of the canopy mechanism 300, by configuring the canopy mechanism 300 to be pivotable around the lower handle frame 120 and to be interlocked with the upper handle frame 110. Specifically, when a user operates the handle frame 100 to fold or unfold the entire cart 10, the upper handle frame 110's pivotal movement relative to the lower handle frame 120 directly drives the canopy mechanism 300 through mechanical interlocking, causing the folding or unfolding to be performed synchronously. This creates a "two-response for one action" operation effect, simplifying the complicated step-by-step operation required in conventional carts. Specifically, in this invention, the upper handle frame 110 is interlocked with the canopy mechanism 300. When the cart 10 is switched from the unfolded state to the folded state, in the first stage, when the upper handle frame 110 rotates relative to the lower handle frame 120 and approaches the lower handle frame 120, the upper handle frame 110 drives the canopy mechanism 300 to fold. In the second stage, when the upper handle frame 110 rotates relative to the lower handle frame 120 and approaches the lower handle frame 120, the upper handle frame 110 drives an external force onto the folded canopy mechanism 300 to unlock the locking mechanism 400 (that is, the continuous pivoting of the upper handle frame 110 relative to the lower handle frame 120 drives the locking mechanism 400 to unlock, and consequently drives the canopy mechanism 300 to rotate together with the lower handle frame 120 and approach the lower handle frame 120). This completes the folding of the cart 10. Conversely, when the cart 10 switches from the folded state to the unfolded state, in the initial stage when the upper handle frame 110 rotates relative to the lower handle frame 120 and separates from the lower handle frame 120, the upper handle frame 110 drives the canopy mechanism 300 to unfold. Specifically, the second canopy bar 330 rotates together with the upper handle frame 110, the first canopy bar 320 is held still, and the canvas 350 is gradually unfolded until the entire canopy mechanism 300 is in the unfolded state.In the latter stage when the upper handle frame 110 rotates relative to the lower handle frame 120 and moves away from the lower handle frame 120, the upper handle frame 110 drives the canopy mechanism 300, which is in the deployed state, to apply an external force to unlock the locking mechanism 400 (that is, the continuous pivoting of the upper handle frame 110 relative to the lower handle frame 120 drives the locking mechanism 400 to unlock, and in turn drives the canopy mechanism 300, which is in the deployed state, to rotate together with the lower handle frame 120 and move away from the lower handle frame 120, thus deploying the cart 10. In this application, when the upper handle frame 110 rotates relative to the lower handle frame 120, the canopy mechanism 3 By driving the 00 to perform a folding or unfolding operation, and then driving the canopy mechanism 300 to continue rotating in the folded or unfolded state, the canopy mechanism 300 and the cart 10 complete the folding or unfolding process in sync. Compared to conventional cart designs (for example, in the folding process, the canopy mechanism is passively compressed after contacting the lower handle frame and maintains an unfolded state until it folds, which can easily damage the pivot mechanism of the canopy mechanism, or when unfolding, the canopy mechanism remains in a folded state throughout, and it is necessary to manually operate it to unfold it after the handle frame 100 is fully unfolded, making multi-stage operation inconvenient), the present invention eliminates the need for external pressure or manual intervention.

[0098] Furthermore, by providing a locking mechanism 400, the present invention solves the problems of insufficient guidance and cushioning present in the folding process of the canopy mechanism 300. Specifically, the support seat 310 of the canopy mechanism 300 rotates around the rotation axis S1, which provides a stable trajectory for the deployment or folding of the canopy mechanism 300 and avoids unexpected collisions caused by the deflection or swinging of the canopy mechanism 300. By restricting the continuous rotation of the support seat 310, the locking mechanism 400 effectively suppresses inertial shocks caused by the rapid rotation of the canopy mechanism 300, significantly reducing rigid shocks between the canopy mechanism 300 and the handle frame 100, thereby reducing the risk of wear and structural deformation of parts and extending the service life of the entire cart 10. Furthermore, the locking mechanism 400 works in cooperation with a plurality of engaging recesses 420 distributed circumferentially at intervals between the engaging projections 410 and the engaging recesses 420. When the first canopy bar 320 rotates the support seat 310, the stepwise disengagement / engagement of the engaging projections 410 and the engaging recesses 420 converts continuous rotation into stepwise motion. The switching between each step is cushioned and stopped by mechanical interlocking, i.e., the rotational impact force is dispersed, preventing the canopy mechanism 300 from abruptly contacting the handle frame 100 due to inertia, and also enabling precise control of the deployment or folding angle through clear gear tactile feedback.

[0099] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all combinations of the technical features in the embodiments described above have been explained, but these combinations of technical features should be considered to fall within the scope described herein, as long as they are not contradictory.

[0100] The embodiments described above are merely examples of some embodiments of the present application, and although their descriptions are specific and detailed, they should not be interpreted as limiting the scope of protection of the invention. Furthermore, a person skilled in the art can make some modifications and improvements as long as they do not deviate from the spirit of the present application, and these too fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be the same as that of the claims. [Explanation of Symbols]

[0101] 10 Cart, 100 Handle frame, 110 Upper handle frame, 120 Lower handle frame, 130 First pivot joint, 131 First connection seat, 1311 First chamber, 1312 First lock groove, 131a First pivot part, 131b First connection part, 131c Movement passage, 1311c Position limiting step, 132 Second connection seat, 1321 Position limiting rib, 1322 Position limiting recess, 1323 Second chamber, 132a Second pivot part, 132b Second connection part, 133 Locking member, 1331 Locking tooth, 1332 Drive unit, 134 Drive member, 135 Fourth elastic member, 136 Fixing member, 140 Cover body, 150 First elastic member, 200 Wheel frame, 210 Front wheel frame, 220 Rear wheel frame, 300 Canopy mechanism, 310 Support seat, 311 Position limiting groove, 3111 First end, 3112 Second end, 320 First canopy bar, 330 Second canopy bar, 340 Third canopy bar, 350 Canopy fabric, 400 Locking mechanism, 410 Engaging projection, 411 Guide slope, 412 Sliding slope, 420 Engaging recess, 420a First engaging recess, 420b Second engaging recess, 420c Third engaging recess, 421 Guide slope, 440 Bracket, 441 Position limiting projection, 450 Positioning recess, 460 Lock recess, 461 Sliding slope, 500 Second pivot joint, 610 Pushing gap, 620 Movable gap, 700 Locking holding mechanism, 710, Holding member 711 First rod, 712 Second rod, 713 Third rod, 714 lock head, 715 gripping part, 720 holding recess, 721 guide slope, 730 third elastic member, 740 mounting frame, 800 second elastic member, 900 lock release operation mechanism, S1 rotation axis, Q1 first pivot point, Q2 second pivot point, F1 first direction, F2 second direction, F3 third direction, α1 first angle, α2 second angle, α3 third angle, α4 fourth angle, α5 fifth angle, α6 sixth angle, α0 central angle.

Claims

1. It's a cart, A handle frame including an upper handle frame and a lower handle frame that are pivotably connected, A canopy mechanism is provided that is pivotable with respect to the lower handle frame and is configured to work in conjunction with the upper handle frame, The locking mechanism is positioned between the canopy mechanism and the lower handle frame and restricts or allows the canopy mechanism to pivot relative to the lower handle frame, A cart characterized in that, during the process of the upper handle frame pivoting relative to the lower handle frame, the upper handle frame drives the canopy mechanism to fold or unfold and drives the locking mechanism to unlock, thereby driving the canopy mechanism to pivot in a direction toward or toward the lower handle frame.

2. When the upper handle frame pivots toward the lower handle frame, the upper handle frame drives the canopy mechanism to fold, and the folded canopy mechanism pivots toward the lower handle frame in conjunction with the pivot of the upper handle frame, or The cart according to claim 1, characterized in that when the upper handle frame pivots away from the lower handle frame, the upper handle frame is driven to deploy the canopy mechanism, and the deployed canopy mechanism pivots away from the lower handle frame in conjunction with the pivot of the upper handle frame.

3. The canopy mechanism includes a support seat and a first canopy bar connected to each other, the support seat being pivotable around a rotation axis relative to the lower handle frame such that the first canopy bar is pivotable relative to the lower handle frame, The cart according to claim 1, wherein the process by which the upper handle frame pivots relative to the lower handle frame includes a first step of fixing the support seat and the first canopy bar to the lower handle frame, and a second step of driving the upper handle frame to pivot so that the first canopy bar pivots toward or toward the lower handle frame.

4. The aforementioned canopy mechanism has both an extended state and a folded state. The canopy mechanism further includes a second canopy bar, the second canopy bar being fixed to the upper handle frame and pivotable relative to the lower handle frame in accordance with the upper handle frame. The cart according to claim 3, characterized in that when the canopy mechanism is in the deployed state, the first canopy bar and the second canopy bar are separated from each other, and when the canopy mechanism is in the folded state, the first canopy bar and the second canopy bar are brought closer to each other.

5. The cart according to claim 4, characterized in that the width of the first canopy bar in the first direction is W1, the width of the second canopy bar in the first direction is W2, and the width of the upper handle frame in the first direction is W3, wherein W1 > W3 > W2.

6. The cart according to claim 3, wherein the handle frame further includes a first pivot joint, the first pivot joint includes a first connecting seat and a second connecting seat pivotally connected to each other, the first connecting seat being connected to the upper handle frame, the second connecting seat being connected to the lower handle frame, and the support seat being rotatable about the axis of rotation and provided on the side of the second connecting seat away from the first connecting seat.

7. The cart according to claim 6, wherein the locking mechanism includes an engaging projection and an engaging recess, the engaging recess is provided on one of the support seat and the second connecting seat, the engaging projection is provided on the other, and when the engaging projection is inserted into the engaging recess, the rotation of the support seat relative to the second connecting seat is restricted, and when the engaging projection is disengaged from the engaging recess, the rotation of the support seat relative to the second connecting seat is permitted.

8. Multiple engagement recesses are provided at intervals in the circumferential direction of the rotation axis. The cart according to claim 7, characterized in that, in the first stage, the engaging projection is maintained in the current engaging recess, and in the second stage, the engaging projection sequentially disengages from the current engaging recess and is inserted into an adjacent engaging recess, so as to restrict the support seat from continuously rotating relative to the second connecting seat.

9. The support seat has a first position and a second position, and is movable along the axial direction of the rotation axis relative to the second connecting seat. When the support seat is in the first position, the engaging projection is inserted into the engaging recess, and when the support seat is in the second position, the engaging projection is disengaged from the engaging recess. The cart according to claim 8, characterized in that, in the first step, the support seat is held in a first position, and in the second step, the support seat is reciprocated between the first position and the second position.

10. The cart according to claim 1, wherein the handle frame further includes a locking mechanism provided between the upper handle frame and the lower handle frame, and when the upper handle frame is folded by pivoting relative to the lower handle frame, the locking mechanism locks the upper handle frame and the lower handle frame to restrict the upper handle frame from unfolding relative to the lower handle frame.

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