Hidden folding frame and trolley

Abstract

The utility model relates to a folding frame, in particular to a hidden folding frame and a trolley. Comprising a front foot support, a rear foot support and a handle support, a main joint sleeve is fixedly arranged at the free end of the rear foot support, a connecting part connected with the main joint sleeve in a rotating fit mode is arranged at the end, opposite to the main joint sleeve, of the handle support, a locking piece is arranged in the connecting part, and a linkage assembly driving the locking piece to move is arranged on the handle support. When the linkage assembly drives the locking piece to move, the locking piece and the main joint sleeve are locked or unlocked in a matched mode. The free end of the front foot support is rotationally connected with the main joint sleeve in a matched mode and driven to turn over through the connecting part. The trolley is stable in overall structure, complex operation steps are not needed, using convenience is improved, the appearance of the trolley is more concise due to the hidden design, and meanwhile the possibility of mistaken touch is reduced.

Description

Technical Field

[0001] This utility model relates to folding bicycle frames, specifically to a concealed folding bicycle frame and a small vehicle. Background Technology

[0002] With the diversification of people's lifestyles and the increasing demand for portability, folding strollers (such as baby strollers, shopping carts, and other personal transportation tools) are becoming increasingly widely used in daily life due to their ease of carrying and storage. However, existing folding stroller frames still have many shortcomings in terms of structural design, ease of operation, structural stability, and aesthetics.

[0003] Traditional folding bicycle frames typically require users to manually operate multiple locking mechanisms (such as knobs and buckles) to fold or unfold, a cumbersome and laborious process. To achieve the folding function, traditional frames often have exposed springs, steel wires, and other mechanical parts, which not only compromises the product's overall appearance but also poses a risk of accidental unlocking or pinching the user, especially children. Furthermore, some frames use simple pins or buckles for component connections, which are prone to loosening, deformation, or even breakage after prolonged use or frequent folding, leading to decreased structural stability and safety hazards. Utility Model Content

[0004] This utility model provides a concealed folding frame and trolley to solve the technical problems of inconvenient operation of the folding frame and the ease with which accidental unlocking or injury to the user may occur.

[0005] To solve the above problems, the present invention provides a concealed folding frame and trolley, which adopts the following technical solution:

[0006] A concealed folding frame includes a front support, a rear support, and a handlebar support. A main joint sleeve is fixedly provided on the free end of the rear support. The handlebar support has a connecting part at the end opposite to the main joint sleeve, which is rotatably connected to the main joint sleeve. A locking element is provided in the connecting part. A linkage component is provided on the handlebar support to drive the locking element to move. When the linkage component drives the locking element to move, the locking element and the main joint sleeve are locked or unlocked.

[0007] The free end of the front foot bracket is rotatably connected to the main joint sleeve and is rotated through the connecting part.

[0008] Furthermore, the locking component includes a movable block with a locking pin on it, and the main joint sleeve has a positioning groove that cooperates with the locking pin. When the linkage component drives the movable block to move outward, the locking pin disengages from the positioning groove.

[0009] Further, the moving block is provided with a U-shaped notch, a spring column is arranged in the U-shaped notch, and the end of the handle support is provided with a pin shaft for limiting the spring column.

[0010] Further, the connecting part is inserted into the main joint sleeve and is rotationally connected through the hinge shaft, and the moving block is provided with an elongated waist hole allowing the hinge shaft to penetrate.

[0011] Further, the handle support comprises an inner rod and an outer rod, a gap is formed between the inner rod and the outer rod, the linkage assembly comprises a pull ring and a folding steel wire, the pull ring is slidably sleeved on the inner rod and is arranged above the outer rod, and one end of the folding steel wire is fixedly connected with the pull ring and the other end is connected with the moving block through the gap between the inner rod and the outer rod.

[0012] Further, the moving block is provided with an L-shaped slot hole for matching the limiting folding steel wire.

[0013] Further, the end of the front leg support close to the main joint sleeve is provided with a connecting piece, and the end of the front leg support with the connecting piece is inserted into the main joint sleeve and the connecting piece is hingedly connected with the connecting part.

[0014] Further, the front leg support is sleeved with a sliding sleeve, the sliding sleeve is arranged in the main joint sleeve, a limiting groove for limiting the sliding sleeve is formed in the main joint sleeve, and the sliding sleeve is rotationally matched with the limiting groove.

[0015] A trolley comprises the hidden folding frame.

[0016] The hidden folding frame has the advantages that:

[0017] 1. The trolley has high overall structural stability, the handle support and the main joint sleeve are reliably locked through cooperation of the locking pin and the positioning groove in the main joint sleeve, the structural stability of the trolley in the unfolded state is ensured, and the safety of the user in use is ensured.

[0018] 2. The trolley is convenient to operate, the free end of the front leg support is rotationally matched and connected with the main joint sleeve and is driven to overturn through the connecting part, when the linkage assembly on the handle is operated to unlock the locking part from the main joint sleeve, only the handle support needs to be pushed or pulled, the connecting part is overturned, the front leg support is driven to overturn, the overall folding operation is more convenient and fast, and the folding efficiency of the trolley is improved.

[0019] 3. The utility model discloses a U-shaped notch and spring column are integrated on the moving block, do not need to increase the external spring structure, simplify the inside layout of car frame. The car steel wire is hidden in the gap between the inner rod and the outer rod, and the appearance is simple and dustproof, and the hidden design also prevents mistaken touch. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein the same or similar components are referred to with the same or similar reference numerals, in which:

[0021] Figure 1 It is a structural schematic view of the hidden folding frame of the utility model;

[0022] Figure 2 It is an explosion view of the hidden folding frame of the utility model;

[0023] Figure 3 It is a sectional view of the hidden folding frame of the utility model;

[0024] Figure 4 It is Figure 3 It is a local enlarged view of area A;

[0025] Figure 5 It is a sectional view of the hidden folding frame of the utility model in the folded state.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, front foot support, 11, connecting piece, 12, sliding sleeve, 2, rear foot support, 3, handle support, 31, connecting part, 311, locking piece, 3111, moving block, 3112, locking pin, 3113, U-shaped notch, 3114, spring column, 3115, long waist hole, 3116, L-shaped groove, 32, linkage assembly, 321, pull ring, 322, car steel wire, 33, pin shaft, 34, inner rod, 35, outer rod, 4, main joint cover, 41, positioning groove, 42, hinged shaft, 43, limiting groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be described clearly and completely below by referring to the accompanying drawings in the embodiments of the utility model, and those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] The number of elements in the drawings is used for illustration and not limitation, and any naming is only used for differentiation and does not have any limiting meaning.

[0030] The principles and spirits of the present application will be explained in detail below with reference to several representative embodiments of the present application.

[0031] An embodiment of the hidden folding frame provided by the present application comprises a front leg support 1, a rear leg support 2 and a handle support 3, a main joint sleeve 4 is fixedly arranged on the free end of the rear leg support 2, the handle support 3 is provided with a connecting part 31 at the end opposite to the main joint sleeve 4, the connecting part 31 is rotationally connected with the main joint sleeve 4, a locking part 311 is arranged in the connecting part 31, a linkage assembly 32 is arranged on the handle support 3 and used to drive the locking part 311 to move, and the locking part 311 is locked or unlocked with the main joint sleeve 4 when the linkage assembly 32 drives the locking part 311 to move.

[0032] As shown in the drawings, Figures 1 to 5

[0033] The hidden folding frame comprises a front leg support 1, a rear leg support 2 and a handle support 3, a main joint sleeve 4 is fixedly arranged on the free end of the rear leg support 2, the handle support 3 is provided with a connecting part 31 at the end opposite to the main joint sleeve 4, the connecting part 31 is rotationally connected with the main joint sleeve 4, a locking part 311 is arranged in the connecting part 31, a linkage assembly 32 is arranged on the handle support 3 and used to drive the locking part 311 to move, and the locking part 311 is locked or unlocked with the main joint sleeve 4 when the linkage assembly 32 drives the locking part 311 to move.

[0034] In this embodiment, the locking part 311 comprises a moving block 3111, a locking pin 3112 is arranged on the moving block 3111, a positioning groove 41 is arranged in the main joint sleeve 4 and used to cooperate with the locking pin 3112, and the locking pin 3112 is separated from the positioning groove 41 when the linkage assembly 32 drives the moving block 3111 to move outward.

[0035] The locking pin 3112 cooperates with the positioning groove 41 in the main joint sleeve 4 to reliably lock the handle support 3 and the main joint sleeve 4, to ensure the structural stability of the trolley in the unfolded state and the safety of the user in use.

[0036] Specifically, the moving block 3111 is provided with a U-shaped notch 3113, a spring column 3114 is arranged in the U-shaped notch 3113, and the end of the handle support 3 is provided with a pin shaft 33 used to limit the spring column 3114.

[0037] The spring column 3114 can be compressed or stretched in the U-shaped notch 3113, the spring column 3114 is compressed to store elastic potential energy when the moving block 3111 moves under external force, and the spring column 3114 restores to the original state to automatically reset the moving block 3111 after the external force is removed.

[0038] The design of the U-shaped notch 3113 can avoid interference between the moving block 3111 and the pin shaft 33 when the moving block 3111 moves.

[0039] ​The U-shaped notch 3113 and the spring column 3114 are integrated on the moving block 3111, without the need to additionally increase external spring structures, thereby simplifying the internal layout of the vehicle frame. The hidden design prevents accidental touch and makes the appearance more simple and beautiful.

[0040] Specifically, the connecting part 31 is inserted into the main joint sleeve 4 and connected through the rotating shaft 42, and the moving block 3111 is provided with an elongated waist hole 3115 allowing the rotating shaft 42 to pass through.

[0041] Through the design of the elongated waist hole 3115, on the one hand, the relative rotation between the moving block 3111 and the main joint sleeve 4 is ensured, and on the other hand, the moving block 3111 can move.

[0042] In the embodiment, the handle support 3 includes an inner rod 34 and an outer rod 35, and a gap is formed between the inner rod 34 and the outer rod 35. The linkage assembly 32 includes a pull ring 321 and a folding steel wire 322. The pull ring 321 is slidably sleeved on the inner rod 34 and above the outer rod 35, one end of the folding steel wire 322 is fixedly connected with the pull ring 321, and the other end is connected with the moving block 3111 through the gap between the inner rod 34 and the outer rod 35.

[0043] The moving block 3111 is provided with an L-shaped slot hole 3116 for limiting the folding steel wire 322.

[0044] The linkage assembly 32 is arranged, so that the user only needs to pull the pull ring 321, and the moving block 3111 is driven to move through the folding steel wire 322, thereby achieving the unlocking between the locking part 311 and the main joint sleeve 4. The operation is simple and convenient, without the need for complex operation steps, thereby improving the user experience.

[0045] The folding steel wire 322 is hidden in the gap between the inner rod 34 and the outer rod 35, and the appearance is simple and dustproof.

[0046] In the embodiment, the free end of the front leg support 1 is rotationally and movably connected with the main joint sleeve 4 and driven to flip through the connecting part 31.

[0047] Specifically, the end of the front leg support 1 close to the main joint sleeve 4 is provided with a connecting piece 11, and the end of the front leg support 1 with the connecting piece 11 is inserted into the main joint sleeve 4 and the connecting piece 11 is hingedly connected with the connecting part 31.

[0048] Specifically, the front leg support 1 is sleeved with a sliding sleeve 12, the sliding sleeve 12 is in the main joint sleeve 4, and the main joint sleeve 4 is formed with a limiting groove 43 for limiting the sliding sleeve 12, and the sliding sleeve 12 and the limiting groove 43 are rotationally connected.

[0049] When the user operates the linkage assembly 32 on the handle 3 to unlock the locking piece 311 from the main joint sleeve 4, only needs to push or pull the handle bracket 3, the connecting part 31 will be flipped, and then drive the front leg bracket 1 to flip. This linkage flipping mechanism makes the folding operation of the front leg bracket 1 more convenient and fast, and the user does not need to operate the front leg bracket 1 alone, which improves the folding efficiency of the trolley.

[0050] A trolley comprising the hidden folding frame of any one of the above.

[0051] In the embodiment, when the trolley needs to be folded, the pull ring 321 is pulled to move the car collecting steel wire 322, and the car collecting steel wire 322 pulls the moving block 3111 to move outward. With the movement of the moving block 3111, the locking pin 3112 is disengaged from the positioning groove 41, and the locking between the handle bracket 3 and the main joint sleeve 4 is released. At the same time, since the connecting piece 11 of the front leg bracket 1 is hingedly connected with the connecting part 31, when the handle bracket 3 drives the connecting part 31 to flip, the front leg bracket 1 also flips, thereby realizing the folding of the trolley.

[0052] According to the above description of the present specification, those skilled in the art can also understand that the terms used, such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer" and the like, are indicative of the orientation or positional relationship based on the orientation or positional relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the scheme of the present application and simplifying the description, and do not explicitly or implicitly indicate or imply that the devices or elements involved must have the described specific orientation, be constructed and operated in a specific orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the present application.

[0053] In addition, in the description of the present specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise explicitly and specifically limited.

Claims

1. A hidden folding frame comprising a front leg support (1), a rear leg support (2) and a handle support (3), characterized in that, The free end of the rear leg support (2) is fixed with a main joint sleeve (4), the end opposite to the main joint sleeve (4) of the handle support (3) is provided with a connecting part (31) which is rotationally connected with the main joint sleeve (4), the connecting part (31) is provided with a locking part (311), the handle support (3) is provided with a linkage assembly (32) which drives the locking part (311) to move, when the linkage assembly (32) drives the locking part (311) to move, the locking part (311) and the main joint sleeve (4) are locked or unlocked. The free end of the front leg support (1) is rotationally connected with the main joint sleeve (4) and is driven by the connecting part (31) to overturn.

2. The hidden folding vehicle frame of claim 1, wherein, The locking part (311) comprises a moving block (3111), the moving block (3111) is provided with a locking pin (3112), the main joint sleeve (4) is provided with a positioning groove (41) which is matched with the locking pin (3112), when the linkage assembly (32) drives the moving block (3111) to move outward, the locking pin (3112) is separated from the positioning groove (41).

3. The hidden folding vehicle frame of claim 2, wherein, The moving block (3111) is provided with a U-shaped notch (3113), the U-shaped notch (3113) is provided with a spring column (3114), the end of the handle support (3) is provided with a pin shaft (33) which is used for limiting the spring column (3114).

4. The hidden folding vehicle frame of claim 2, wherein, The connecting part (31) is inserted into the main joint sleeve (4) and is rotationally connected through a hinge shaft (42), the moving block (3111) is provided with an elongated waist hole (3115) which allows the hinge shaft (42) to penetrate.

5. The hidden folding vehicle frame of claim 2, wherein, The handle support (3) comprises an inner rod (34) and an outer rod (35), a gap is formed between the inner rod (34) and the outer rod (35), the linkage assembly (32) comprises a pull ring (321) and a folding steel wire (322), the pull ring (321) is sleeved on the inner rod (34) and is above the outer rod (35), one end of the folding steel wire (322) is fixedly connected with the pull ring (321) and the other end is connected with the moving block (3111) through the gap between the inner rod (34) and the outer rod (35).

6. The hidden folding vehicle frame of claim 5, wherein, The moving block (3111) is provided with an L-shaped slot (3116) which is used for matching and limiting the folding steel wire (322).

7. The hidden folding vehicle frame of claim 2, wherein, The end close to the main joint sleeve (4) of the front leg support (1) is provided with a connecting piece (11), the end of the front leg support (1) with the connecting piece (11) is inserted into the main joint sleeve (4) and the connecting piece (11) is hingedly connected with the connecting part (31).

8. The hidden folding vehicle frame of claim 7, wherein, The front leg support (1) is sleeved with a sliding sleeve (12), the sliding sleeve (12) is in the main joint sleeve (4) and the main joint sleeve (4) is formed with a limiting groove (43) which is used for limiting the sliding sleeve (12), the sliding sleeve (12) and the limiting groove (43) are rotationally matched.

9. A trolley characterised by The hidden folding frame comprises the hidden folding frame according to any one of claims 1-8.

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