Folding cart

Abstract

The invention provides a folding cart which comprises a support assembly comprising a first support and a second support which are arranged at an interval in the first direction; the underframe assembly is arranged between the first bracket and the second bracket and comprises a first underframe hinged to the first bracket and a second underframe hinged to the second bracket; the first bottom frame is constructed to comprise a first parallel rod structure which is vertically arranged, and the second bottom frame is constructed to comprise a second parallel rod structure which is vertically arranged. The first parallel rod structure and the second parallel rod structure are hinged to the groove connecting piece and are configured to respond to movement of the groove connecting piece in the vertical direction to drive the first bottom frame and the second bottom frame to move synchronously. The chassis assembly with the parallel rod structure is adopted, the supporting strength is improved, meanwhile, overall folding or unfolding of the chassis assembly is achieved through the groove connecting pieces, and folding or unfolding operation is simplified. The folding cart is not provided with a side support, the packaging size is greatly reduced after the folding cart is folded, and the folding cart is convenient to transport, use, store and store.

Description

Technical Field

[0001] The present invention relates to the technical field of outdoor products, and in particular to a folding stroller. Background Art

[0002] With the improvement of living standards, people's demand for leisure and entertainment is becoming more and more diversified. Folding carts are widely favored by people due to their portability and are convenient for outdoor use. A folding cart is a cart that can be folded to reduce its size. It is easy to carry, store and transport in the folded state, and can be used by users to carry items and move in the unfolded state to meet the needs of carrying goods or shopping.

[0003] Most existing folding strollers have side brackets and complex structures. They are usually inconvenient to operate during folding or unfolding. In addition, due to the large number of parts, the overall volume is large after folding, which is not conducive to carrying and storage, and also leads to high costs. In addition, for the bottom bracket that carries items, after the bottom bracket is unfolded, the force applied downward to the bottom bracket is concentrated in the middle of the bottom bracket, which easily causes the rod located in the middle to deform or even break. Therefore, both manufacturers and users have put forward more improvement requirements for folding stroller products. Summary of the invention

[0004] The purpose of the present disclosure is to provide a foldable stroller, which reduces the volume of the stroller after folding with a simplified structure, optimizes the folding or unfolding method, and improves the user's comfort.

[0005] To this end, the present disclosure provides a foldable cart, which includes: a bracket assembly, the bracket assembly includes a first bracket and a second bracket arranged at intervals along a first direction; a base frame assembly, the base frame assembly is arranged between the first bracket and the second bracket, and includes a first base frame and a second base frame, the first base frame is hinged to the first bracket, and the second base frame is hinged to the second bracket; wherein the first base frame is constructed to include a vertically arranged first parallel rod structure, the second base frame is constructed to include a vertically arranged second parallel rod structure, the first parallel rod structure and the second parallel rod structure are hinged to a slot connector, and are configured to drive the first base frame and the second base frame to move synchronously in response to the movement of the slot connector along the vertical direction.

[0006] According to the above technical concept, the embodiments of the present disclosure may further include any one or more of the following optional forms.

[0007] In some optional forms, the first base frame and the second base frame respectively include a plurality of support rods, and at least one pair of parallel support rods extending along the first direction and arranged vertically spaced apart constitute the first parallel rod structure or the second parallel rod structure.

[0008] In certain optional forms, the first bracket includes a pair of first uprights spaced apart along a second direction and a first connecting rod arranged therebetween, the second bracket includes a pair of second uprights spaced apart along a second direction and a second connecting rod arranged therebetween, the second direction is perpendicular to the first direction; the first parallel rod structure includes a pair of first parallel rods respectively hinged to the pair of first uprights, the second parallel rod structure includes a pair of second parallel rods respectively hinged to the pair of second uprights, the opposite ends of each first parallel rod and each corresponding second parallel rod are respectively hinged to one of the slot connectors.

[0009] In certain optional forms, the first parallel rods include a first upper rod and a first lower rod arranged vertically at intervals, and the second parallel rods include a second upper rod and a second lower rod arranged vertically at intervals; the first parallel rods and the second parallel rods have the same or different lengths.

[0010] In some optional forms, the first base frame includes a plurality of first support rods parallel to the first upper rod and / or the first lower rod, and the second base frame includes a plurality of second support rods parallel to the second upper rod and / or the second lower rod.

[0011] In some optional forms, the length of the first vertical rod and the second vertical rod does not exceed the length of the first parallel rod and / or the second parallel rod.

[0012] In certain optional forms, the slot connector is constructed to include a pair of side walls extending vertically and spaced apart and a connecting wall connecting the pair of side walls, the first parallel rod and the second parallel rod are respectively hinged between the pair of side walls, and the connecting wall constitutes a stop for the first parallel rod and the second parallel rod to move in the vertical direction.

[0013] In some optional forms, the connecting wall is a top wall of the slot connector, and the side wall is configured to gradually decrease in size from the connecting wall toward a bottom.

[0014] In some optional forms, the length of the first upper rod is less than or equal to the length of the first lower rod, and the length of the second upper rod is less than or equal to the length of the second lower rod.

[0015] In some optional forms, the base frame assembly further includes a connecting shaft disposed between the first base frame and the second base frame, the connecting shaft being connected to the slot connector to facilitate movement of the slot connector in a vertical direction.

[0016] The folding cart disclosed in the present invention adopts a chassis assembly with a parallel rod structure, which improves the support strength and can avoid deformation or breakage caused by stress concentration in the middle of the chassis assembly. At the same time, the chassis assembly can be folded or unfolded as a whole through the slot connector, which greatly simplifies the folding or unfolding operation. In addition, the folding cart disclosed in the present invention has no side brackets, and the packaging volume is greatly reduced after folding, which is convenient for transportation, use and storage, and improves the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features and advantages of the present disclosure will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar components, wherein:

[0018] Figure 1 is a schematic diagram of a folding stroller in an unfolded state according to an embodiment of the present disclosure;

[0019] Figure 2 for Figure 1 A schematic side view of the folding stroller in the illustrated state;

[0020] Figure 3 for Figure 1 A schematic diagram of a foldable stroller in a partially folded state;

[0021] Figure 4 for Figure 3 A schematic side view of the folding stroller in the illustrated state;

[0022] Figure 5 for Figure 1 A magnified schematic diagram of part A;

[0023] Figure 6 is a cross-sectional schematic diagram of a slot connector hingedly connected with a first parallel rod and a second parallel rod;

[0024] Figure 7 for Figure 1 A schematic diagram of the mid-folding stroller in a fully folded state;

[0025] Figure 8 for Figure 7 A schematic side view of the folding stroller in the illustrated state. DETAILED DESCRIPTION

[0026] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are only exemplary of specific ways to implement and use the present disclosure, and are not intended to limit the scope of the present disclosure. When describing the structural positions of various components, such as up, down, top, bottom, etc., the expressions of directions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.

[0027] Herein, the expression “include” or similar expressions “comprising”, “including” and “having” are open-ended and do not exclude additional unrecited elements, steps or components.

[0028] In this document, unless otherwise specifically defined, the terms "installation", "connection", "attachment" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this document can be understood according to the specific circumstances.

[0029] Herein, the terms "first", "second", etc. are not used to limit the order of precedence and the number of components, unless otherwise specified.

[0030] It is known that most of the existing folding carts have side brackets and a complex structure, which makes the folding or unfolding process inconvenient. In addition, due to the large number of parts, not only is the cost high, but the overall volume is large after folding, which is not conducive to carrying and storing. In addition, the middle part of the bottom bracket of the existing folding cart is prone to deformation and fracture. According to the concept of the present disclosure, a folding cart without side brackets is provided, and the folding or unfolding operation is simplified through the structural design of the bottom frame assembly, which is convenient for users to use, while reducing the overall volume after folding, and avoiding deformation or fracture of the middle part of the bottom frame assembly, thereby improving the structural strength and reliability of the folding cart.

[0031] Figure 1A folding cart in an unfolded state according to an embodiment of the present disclosure is shown. In general, the folding cart includes a support assembly and a base assembly, the support assembly includes a first support 110 and a second support 120 arranged at intervals along a first direction D1, the base assembly is arranged between the first support 110 and the second support 120, and includes a first base 210 and a second base 220, the first base 210 is hinged to the first support 110, and the second base 220 is hinged to the second support 120. The first support 110 can be referred to as a front support, and the second support 120 can be referred to as a rear support, where "front" and "rear" are relative to the position of the user, for example, when the user uses the folding cart, the front support is close to the user, and the rear support is away from the user.

[0032] According to the present disclosure, the first chassis 210 is configured to include a first parallel rod structure arranged vertically, and the second chassis 220 is configured to include a second parallel rod structure arranged vertically, where "vertical" refers to a direction substantially perpendicular to the ground. Advantageously, the first parallel rod structure and the second parallel rod structure are hinged to the slot connector, and are configured to respectively drive the first chassis and the second chassis to move synchronously in response to the movement of the slot connector in the vertical direction. In other words, the chassis assembly can be folded upward or unfolded downward through the slot connector.

[0033] With the method disclosed in the present invention, the folding or unfolding of the folding cart only involves the movement of the chassis assembly, which is easy to operate. Since there is no side bracket, the number of parts is significantly reduced compared to the existing folding carts, so the weight is light and the cost is greatly reduced. In the folded state, the volume is small and easy to store. In addition, the double-layer chassis assembly effectively distributes the force applied to the chassis assembly evenly, improves the support strength, and avoids the deformation or fracture defects caused by the force applied to the existing folding cart concentrated in the middle of the chassis. In addition, also because there is no side bracket, the folding cart has some additional functions in addition to carrying items in the unfolded state, for example, it can be used as a stool.

[0034] In some embodiments, the first base frame 210 and the second base frame 220 include a plurality of support rods 211 and 221, respectively, and the plurality of support rods can extend along the first direction D1, or extend at an angle to the first direction. Depending on different needs, the plurality of support rods can also cross and extend to provide the required support strength. Advantageously, at least one pair of parallel support rods extending along the first direction D1 and arranged vertically at intervals constitute a first parallel rod structure or a second parallel rod structure. It should be understood that the first parallel rod structure and the second parallel rod structure can be set to one, two or more, respectively, according to different needs, as long as the first parallel rod structure and the second parallel rod structure correspond to each other in pairs, and accordingly, the number of slot connectors can be set to one, two or more.

[0035] In the illustrated embodiment, the first support 110 includes a pair of first vertical rods 111 spaced apart along the second direction D2 and a first connecting rod 112 disposed therebetween. The second support 120 includes a pair of second vertical rods 121 spaced apart along the second direction D2 and a second connecting rod 122 disposed therebetween. The second direction D2 is perpendicular to the first direction D1. The first vertical rod 111 can be fixed to the first connecting rod 112 through the first connecting member 113, and the second vertical rod 121 can be fixed to the second connecting rod 122 through the second connecting member 123 and thus maintained in an upright state.

[0036] The folding cart further includes a plurality of wheels 400 attached to the first support 110 and the second support 120. Specifically, each wheel 400 is attached to the first connecting rod 112 and the second connecting rod 122 through a wheel bracket 410 and can be generally located below the first vertical rod 111 and the second vertical rod 121. The folding cart may further include a handle assembly, and the handle assembly can be attached to the first support 110 or the second support 120. In the illustrated embodiment, the handle assembly is attached to the first support 110 and includes a handle 610 and a handle vertical rod 620 that attaches the handle 610 to the first connecting rod 112. In some embodiments, the handle vertical rod 620 can be fixedly connected or hinged to the first connecting rod 112 through a handle connecting member 630. When the hinged manner is adopted, the handle assembly can pivot up and down so as to tilt at a certain angle relative to the vertical direction for the user to pull and use. Alternatively, the handle vertical rod 620 is configured to be telescopic so as to be able to adjust the length to meet the needs of users of different heights.

[0037] In some embodiments, the first parallel rod structure may include a pair of first parallel rods 230 respectively hinged to a pair of first vertical rods 111 through the first connecting members 113. The second parallel rod structure may include a pair of second parallel rods 240 respectively hinged to a pair of second vertical rods 121 through the second connecting members 123. The opposite ends of each first parallel rod 230 and the corresponding second parallel rod 240 are respectively hinged to a groove connecting member 300. That is, in the illustrated embodiment, it includes a pair of groove connecting members 300. It should be understood that the structures and dimensions of the pair of first parallel rods 230 spaced apart in the second direction D2 are substantially the same. Similarly, the structures and dimensions of the pair of second parallel rods 240 are also substantially the same. In some embodiments, the structures and dimensions of the first parallel rod 230 and the corresponding second parallel rod 240 may be the same or different, and advantageously are symmetric with respect to the groove connecting member 300. For the sake of simplicity, only one first parallel rod 230 and the corresponding second parallel rod 240 are specifically described hereinafter.

[0038] Combined with Figures 1 to 4In some embodiments, the first parallel rod 230 includes a first upper rod 231 and a first lower rod 232 arranged vertically at intervals, and the second parallel rod 240 includes a second upper rod 241 and a second lower rod 242 arranged vertically at intervals. In some embodiments, the first base frame 210 includes a plurality of first support rods 211 parallel to the first upper rod 231 and / or the first lower rod 232. Figure 1 The exemplary illustration shows that a plurality of first support rods 211 are parallel to the first upper rod 231. Similarly, the second base frame 220 includes a plurality of second support rods 221 parallel to the second upper rod 241 and / or the second lower rod 242. Figure 1 It is exemplarily shown that the plurality of second support rods 221 are parallel to the second upper rod 241 .

[0039] Combination Figure 1 , Figure 5 and Figure 6 As shown, in some embodiments, the slot connector 300 is constructed to include a pair of side walls 310, 320 extending vertically and spaced apart and a connecting wall 330 connecting the pair of side walls 310, 320, and the first parallel rod 230 and the second parallel rod 240 are hinged between the pair of side walls 310, 320, respectively. Advantageously, the connecting wall 330 constitutes a stop for the vertical movement of the first parallel rod 230 and the second parallel rod 240. In the illustrated embodiment, the connecting wall 330 serves as the top wall of the slot connector 300, and will not affect the first parallel rod 230 and the second parallel rod 240 from being retracted into the slot connector when the slot connector 300 moves upward, but can prevent the opposite ends of the first parallel rod 230 and the second parallel rod 240 hinged to the slot connector 300 from collapsing downward when the slot connector 300 moves downward. Specifically, when the folding stroller needs to be moved from Figure 1 When the unfolded state is folded, the slot connector 300 is moved upward, so that the opposite ends of the first parallel rod 230 and the second parallel rod 240 hinged to the slot connector 300 move upward synchronously, and the ends of the first parallel rod 230 and the second parallel rod 240 hinged to the first bracket 110 and the second bracket 120 gradually move toward each other, so that the bottom frame assembly is in a Figure 3 and Figure 4 The partially folded state or transition state shown. Continue to move the slot connector 300 upward so that the chassis assembly is finally in Figure 7 and Figure 8 In the fully folded state shown, the first parallel rod 230 and the second parallel rod 240 are folded in the slot connector 300. Conversely, when the folding cart needs to be unfolded, the first parallel rod 230 and the second parallel rod 240 folded in the slot connector 300 are separated from each other, and the slot connector 300 can be pressed downward until the opposite ends of the first parallel rod 230 and the second parallel rod 240 hinged to the slot connector 300 are stopped by the connecting wall 330, as shown in FIG. Figure 6As shown. In this way, the first parallel rod 230 and the second parallel rod 240 are maintained in the unfolded state, and the overall structure of the chassis assembly is stable and reliable. The slot connector 300, as a single component connecting the first parallel rod 230 and the second parallel rod 240, not only greatly reduces the number of parts of the chassis assembly, but also facilitates assembly, and can effectively share the force of the first parallel rod and the second parallel rod, further avoiding deformation or fracture defects in the middle of the chassis assembly.

[0040] In some embodiments, the pair of side walls 310, 320 of the slot connector 300 are configured to taper downward from the connecting wall 330, so as to facilitate the folding of the first parallel rod 230 and the second parallel rod 240. Similarly, according to different needs, the length of the first upper rod 231 of the first parallel rod 230 can be less than or equal to the length of the first lower rod 232, and similarly, the length of the second upper rod 241 of the second parallel rod 240 can be less than or equal to the length of the second lower rod 242. Figure 6 In order to enhance the supporting strength, the first upper rod 231 may also be configured to be thicker than the first lower rod 232, and the second parallel rod 240 is also configured to be thicker.

[0041] Advantageously, the base frame assembly further includes a connecting shaft 500 disposed between the first base frame 210 and the second base frame 220, and the connecting shaft 500 is connected to the slot connector 300 to promote the movement of the slot connector 300 in the vertical direction. When two slot connectors 300 are provided, the connecting shaft 500 is connected between the two slot connectors 300. Figure 6 The mounting hole 321 for connecting the shaft 500 on the side wall 320 of the slot connector 300 is exemplarily shown. When the cart needs to be folded, the user lifts the connecting shaft 500 upwards, which can drive the slot connector 300 and the first bottom frame 210 and the second bottom frame 220 attached thereto to move upwards synchronously, and at the same time, the ends of the first bottom frame 210 and the second bottom frame 220 connected to the first bracket 110 and the second bracket 120 gradually move closer, thereby realizing the folding of the cart.

[0042] from Figure 7 and Figure 8 It can be seen that in some embodiments, the length of the first vertical rod 111 and the second vertical rod 121 is advantageously set to not exceed the length of the first parallel rod 230 and / or the second parallel rod 240. In this way, when in the folded state, the height of the cart is substantially the sum of the length of the first parallel rod 230 and the second parallel rod 240 and the height of the wheels, and the overall size is greatly reduced compared to the existing carts, which is conducive to storage and transportation.

[0043] The folding cart disclosed in the present invention simplifies the cart structure, removes the side brackets and optimizes the folding method, so that the folding or unfolding process is convenient and fast, and the volume of the cart after folding is reduced while reducing the number of parts and reducing costs, making it easy to store. In addition, the folding cart disclosed in the present invention without side brackets can carry larger items, such as items that exceed the size of the chassis assembly. In some embodiments, a cargo frame made of a flexible material, such as cloth, can also be provided. The cargo frame can be arranged on the first bracket 110 and the second bracket 120 and supported by the first upright 111 and the second upright 121. When the folding cart needs to be folded, the cargo frame can be detachably removed and installed after unfolding. Alternatively, the cargo frame can be deformed accordingly as the chassis assembly is folded or unfolded.

[0044] It should be understood here that the embodiments shown in the figures only show the optional architecture, shape, size and arrangement of various optional components of the folding stroller according to the present disclosure, but they are only illustrative and not restrictive. Other shapes, sizes and arrangements may also be adopted without departing from the concept and scope of the present disclosure.

[0045] The technical content and technical features of the present disclosure have been disclosed above. However, it can be understood that under the creative ideas of the present disclosure, technicians in this field can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present disclosure. The description of the above implementation mode is illustrative rather than restrictive, and the protection scope of the present disclosure is determined by the claims.

Claims

1. A folding cart, It is characterized in that The folding cart comprises: A bracket assembly, the bracket assembly comprising a first bracket and a second bracket arranged at intervals along a first direction; A chassis assembly, the chassis assembly is arranged between the first bracket and the second bracket, and comprises a first chassis and a second chassis, the first chassis is hinged to the first bracket, and the second chassis is hinged to the second bracket; Among them, the first base frame is constructed to include a first parallel rod structure arranged vertically, and the second base frame is constructed to include a second parallel rod structure arranged vertically. The first parallel rod structure and the second parallel rod structure are hinged to a slot connector and are configured to drive the first base frame and the second base frame to move synchronously respectively in response to the movement of the slot connector along the vertical direction.

2. The folding stroller according to claim 1, It is characterized in that The first base frame and the second base frame respectively include a plurality of support rods, and at least one pair of parallel support rods extending along the first direction and arranged vertically spaced apart constitutes the first parallel rod structure or the second parallel rod structure.

3. The folding stroller according to claim 1, It is characterized in that The first bracket includes a pair of first uprights arranged at intervals along a second direction and a first connecting rod arranged therebetween, and the second bracket includes a pair of second uprights arranged at intervals along a second direction and a second connecting rod arranged therebetween, and the second direction is perpendicular to the first direction; The first parallel rod structure includes a pair of first parallel rods respectively hinged to the pair of first vertical rods, and the second parallel rod structure includes a pair of second parallel rods respectively hinged to the pair of second vertical rods, and the opposite ends of each first parallel rod and the corresponding second parallel rods are respectively hinged to one of the slot connectors.

4. The folding stroller according to claim 3, It is characterized in that The first parallel rods include a first upper rod and a first lower rod arranged vertically at intervals, and the second parallel rods include a second upper rod and a second lower rod arranged vertically at intervals; the first parallel rods and the second parallel rods have the same or different lengths.

5. The folding stroller according to claim 4, It is characterized in that The first base frame includes a plurality of first support rods parallel to the first upper rod and / or the first lower rod, and the second base frame includes a plurality of second support rods parallel to the second upper rod and / or the second lower rod.

6. The folding stroller according to claim 3, It is characterized in that The lengths of the first vertical rod and the second vertical rod do not exceed the lengths of the first parallel rod and / or the second parallel rod.

7. The folding stroller according to claim 4, It is characterized in that The slot connector is constructed to include a pair of side walls extending vertically and spaced apart and a connecting wall connecting the pair of side walls, the first parallel rod and the second parallel rod are respectively hinged between the pair of side walls, and the connecting wall constitutes a stop for the first parallel rod and the second parallel rod to move in the vertical direction.

8. The folding stroller according to claim 7, It is characterized in that The connecting wall is a top wall of the slot connector, and the side wall is configured to gradually decrease in size from the connecting wall toward a lower side.

9. The folding stroller according to claim 8, It is characterized in that The length of the first upper rod is less than or equal to the length of the first lower rod, and the length of the second upper rod is less than or equal to the length of the second lower rod.

10. The folding stroller according to claim 1, It is characterized in that The base frame assembly further includes a connecting shaft disposed between the first base frame and the second base frame, the connecting shaft being connected to the slot connector to facilitate movement of the slot connector in a vertical direction.

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