Gravity self-folding frame

Abstract

The utility model discloses a gravity self-folding frame which comprises a bottom frame, walking wheels are arranged on the front side and the rear side of the lower end of the bottom frame respectively. The seat frame is hinged to the rear side of the bottom frame, and a sliding seat capable of moving along the seat frame is arranged on the seat frame; the supporting frame is hinged to the front side of the bottom frame and the sliding seat; the handlebar assembly is coaxially and rotatably connected with the supporting frame and the sliding seat, and the handlebar assembly is connected with the supporting frame; the first locking mechanism is used for locking the sliding seat on the seat frame to enable the bottom frame, the seat frame, the supporting frame and the handlebar assembly to be in an unfolded state, and the first locking mechanism is unlocked to enable the sliding seat to slide on the seat frame under the action of gravity to drive the handlebar assembly, the seat frame and the supporting frame to rotate and be folded on the bottom frame; the device can be operated by one hand and is convenient to use.

Description

Technical Field

[0001] This application relates to the field of handcart technology, specifically to a gravity-folding cart frame. Background Technology

[0002] Traditional foldable strollers typically use mechanical linkage mechanisms to achieve the folding function. In existing technologies, the folding operation generally requires the user to perform unlocking and force actions. First, the locking devices distributed at the joints of the frame must be manually released. Then, a specific direction of push or pressure must be applied to the push rod to trigger the linkage mechanism, which in turn drives the frame, wheel set, and support components to complete the folding action.

[0003] This type of folding mechanism has significant limitations in practical applications: the unlocking and force application actions need to be performed in steps and there are time requirements for operation. Users need to keep both hands working together, and it is difficult to complete the operation with one hand when holding a baby or holding an object. Summary of the Invention

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a gravity-folded frame that can be operated with one hand, and the technical solution adopted includes:

[0005] A gravity-folding frame, comprising:

[0006] The base frame has wheels on both the front and rear sides at the bottom.

[0007] A seat frame is hinged to the rear side of the base frame, and a sliding seat that can move along the seat frame is provided on the seat frame;

[0008] The support frame is hinged to the front side of the base frame and the sliding seat;

[0009] The handlebar assembly and the support frame are rotatably connected coaxially to the sliding seat, and the handlebar assembly is connected to the support frame;

[0010] A first locking mechanism is used to lock the sliding seat on the seat frame so that the base frame, seat frame, support frame and handlebar assembly are in the unfolded state. When the first locking mechanism is unlocked, the sliding seat slides on the seat frame under the action of gravity and drives the handlebar assembly, seat frame and support frame to rotate and fold on the base frame.

[0011] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the handlebar assembly includes an upper handlebar, a lower handlebar, a second locking mechanism, and a linkage unlocking mechanism. The lower handlebar is hinged to the upper handlebar and the sliding seat. The second locking mechanism is used to lock the lower handlebar and the upper handlebar in an unfolded state. The linkage unlocking mechanism is connected to the upper handlebar and the second locking mechanism. After the second locking mechanism is unlocked, the upper handlebar rotates forward relative to the lower handlebar to an angle. Then, the upper handlebar unlocks the first locking mechanism through the linkage unlocking mechanism. The upper handlebar, lower handlebar, seat frame, support frame, and sliding seat fold onto the base frame under the action of gravity.

[0012] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the first locking mechanism includes a pin installed on the lower handlebar by an elastic element, the sliding seat is provided with a through hole, the seat frame is provided with a insertion hole, and the pin passes through the through hole and is inserted into the insertion hole.

[0013] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the linkage unlocking mechanism includes a slider and a traction member. The slider is movably installed in the lower handlebar and connected to the upper handlebar through a linkage structure. One end of the traction member is connected to the other end of the slider, and the other end extends along the inside of the lower handlebar to connect with the pin. After the first locking mechanism is unlocked, when the upper handlebar rotates forward relative to the lower handlebar, the slider moves under the action of the linkage structure and the traction member pulls the pin out of the socket.

[0014] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the linkage structure includes a guide member and a guide groove disposed on the upper handlebar. The slider is connected to the guide member. The guide member extends into the guide groove and can slide in the guide groove. When the upper handlebar rotates forward under the action of external force, the guide groove drives the slider to move through the guide member.

[0015] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the sliding seat is provided with an arc-shaped groove, the support frame, the sliding seat and the handlebar assembly are coaxially rotatably connected, the center of the arc-shaped groove coincides with the rotational connection center of the support frame, the sliding seat and the handlebar assembly, the support frame is provided with a first connection hole, the handlebar assembly is provided with a second connection hole, and the connector passes through the arc-shaped groove and is inserted into the first connection hole and the second connection hole.

[0016] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the frame is further provided with a limiting seat, and the sliding seat moves between the lower end of the frame and the limiting seat.

[0017] The beneficial effects of this utility model are as follows: After the first locking mechanism is unlocked, the handlebar assembly, seat frame, support frame and sliding seat of this gravity self-folding frame automatically fold onto the base frame under the action of gravity, and the folding operation can be completed with one hand, making the operation more convenient. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the frame structure described in this embodiment. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the frame structure described in this embodiment. Figure 2 ;

[0021] Figure 3 This is a side view of the vehicle frame as described in this embodiment when it is unfolded;

[0022] Figure 4 This is a schematic diagram of the structure of the upper handlebar after it has been rotated forward by an angle relative to the lower handlebar as described in this embodiment;

[0023] Figure 5 This is a schematic diagram of the structure after the sliding seat slides downward along the frame after the first locking mechanism in this embodiment is unlocked;

[0024] Figure 6 This is a schematic diagram of the structure of the first locking mechanism and the linkage unlocking mechanism in this embodiment;

[0025] Figure 7 This is a schematic diagram of the linkage unlocking mechanism when the vehicle frame is in the unfolded state, as described in this embodiment.

[0026] Figure 8 This is a schematic diagram of the linkage unlocking mechanism after the upper handlebar rotates forward relative to the lower handlebar as described in this embodiment;

[0027] Figure 9 This is a schematic diagram of the second locking mechanism in this embodiment;

[0028] Figure 10 This is a schematic diagram of the connection between the handlebar assembly and the support frame described in this embodiment. Detailed Implementation

[0029] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0030] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Reference Figure 1-10 The present application proposes an embodiment of a gravity-folding frame, which includes:

[0034] The base frame 10 has wheels 20 on the front and rear sides at the bottom.

[0035] The seat frame 30 is hinged to the front side of the base frame 10, and the seat frame 30 is provided with a sliding seat 40 that can move along it;

[0036] The support frame 50 is hinged at one end to the front side of the base frame 10 and rotatably connected to the sliding seat 40 at the other end.

[0037] The handlebar assembly 60 is rotatably connected to the sliding seat 40 and connected to the support frame 50;

[0038] The first locking mechanism 70 is used to lock the sliding seat 40 onto the seat frame 30 so that the base frame 10, seat frame 30, support frame 50 and handlebar assembly 60 are in an unfolded state. The first locking mechanism 70 is unlocked so that the handlebar assembly 60, seat frame 30, support frame 50 and sliding seat 40 are folded onto the base frame 10 under the action of gravity.

[0039] Referring to the accompanying drawings, after the first locking mechanism 70 is unlocked, the sliding seat 40 can slide downwards along the seat frame 30 under the action of gravity. The sliding seat 40 will drive the support frame 50 and the seat frame 30 to rotate downwards synchronously and fold onto the base frame 10. After the first locking mechanism 70 is unlocked, the handlebar assembly 60 can rotate relative to the sliding seat 40, so that the handlebar assembly 60 rotates downwards under the action of gravity and folds onto the base frame 10. In this application's gravity-folding frame, after the first locking mechanism 70 is unlocked, the handlebar assembly 60, seat frame 30, support frame 50, and sliding seat 40 automatically fold onto the base frame 10 under the action of gravity, and the folding operation can be completed with one hand, making operation more convenient.

[0040] In this embodiment, the handlebar assembly 60 includes an upper handlebar 61, a lower handlebar 62, a second locking mechanism 63, and a linkage unlocking mechanism 64. The lower handlebar 62 is hinged to the upper handlebar 61 and the sliding seat 40. The second locking mechanism 63 is used to lock the lower handlebar 62 and the upper handlebar 61 in an unfolded state. The linkage unlocking mechanism 64 is connected to the upper handlebar 61 and the second locking mechanism 63. After the second locking mechanism 63 is unlocked, the upper handlebar 61 rotates forward relative to the lower handlebar 62 to an angle. The upper handlebar 61 then unlocks the first locking mechanism 70 through the linkage unlocking mechanism 64. The upper handlebar 61, lower handlebar 62, seat frame 30, support frame 50, and sliding seat 40 fold onto the base frame 10 under the action of gravity.

[0041] Referring to the attached drawings, to avoid the gravity-folded frame taking up too much space after folding, the handlebar assembly 60 is designed as an upper handlebar 61 and a lower handlebar 62 that are hinged together. The upper handlebar 61 and the lower handlebar are locked together by a second locking mechanism 63. After the second locking mechanism 63 is unlocked, the upper handlebar 61 rotates forward relative to the lower handlebar 62 to an angle. Then, the upper handlebar 61 unlocks the first locking mechanism 70 through a linkage unlocking mechanism 64. Under the action of gravity, the upper handlebar 61, lower handlebar 62, seat frame 30, support frame 50, and sliding seat 40 fold onto the base frame 10, thereby meeting the length design requirements of the handlebar assembly 60 and ensuring that the user can complete the folding operation with one hand, making the operation more convenient.

[0042] In this embodiment, the structure and working principle of the second locking mechanism 63 are existing technologies, and this application will not describe them in detail. As long as the unlocking and locking of the rotation connection of the upper handlebar 61 and the lower handlebar 62 can be realized, for example, in this embodiment, the second locking mechanism 63 includes a cable, a switch assembly and a pin as described in the utility model patent document with announcement number CN222116902U to realize the rotation control of the upper handlebar 61 and the lower handlebar 62.

[0043] Specifically, the first locking mechanism 70 includes a pin 71 mounted on the handlebar 62 via an elastic element, the sliding seat 40 is provided with a through hole 41, the seat frame 30 is provided with an insertion hole 31, and the pin 71 passes through the through hole 41 and is inserted into the insertion hole 31.

[0044] The linkage unlocking mechanism 64 includes a slider 641 and a traction member. The slider 641 is movably installed in the lower handlebar 62 and connected to the upper handlebar 61 through a linkage structure. One end of the traction member is connected to the other end of the slider 641, and the other end extends along the interior of the lower handlebar 62 to connect with the pin 71. After the first locking mechanism 70 is unlocked, when the upper handlebar 61 rotates forward relative to the lower handlebar 62, the slider 641 moves under the action of the linkage structure and the traction member pulls the pin 71 out of the socket 31.

[0045] The linkage structure includes a guide member 642 and a guide groove 643 disposed on the upper handlebar 61. The slider 641 is connected to the guide member 642. The guide member 642 extends into the guide groove 643 and can slide within the guide groove 643. When the upper handlebar 61 rotates forward under the action of an external force, the guide groove 643 drives the slider 641 to move through the guide member 642. When the upper handlebar 61 rotates at a certain angle relative to the lower handlebar 62, the guide member 642 moves towards the rotational connection between the lower handlebar 62 and the upper handlebar 61 under the action of the guide groove 643, so that the slider 641 pulls the pin 71 out of the insertion hole 31 through the traction member.

[0046] Specifically, the sliding seat 40 is provided with an arc-shaped groove 42. The support frame 50, the sliding seat 40, and the handlebar assembly 60 are coaxially rotatably connected. The center of the arc-shaped groove 42 coincides with the rotational connection center of the support frame 50, the sliding seat 40, and the handlebar assembly 60. The support frame 50 is provided with a first connecting hole 51, and the handlebar assembly 60 is provided with a second connecting hole 65. The connector passes through the arc-shaped groove 42 and is inserted into the first connecting hole 51 and the second connecting hole 65. In this embodiment, the through hole 41 is coaxially distributed with the arc-shaped groove 42. The handlebar assembly 60 is inserted into the through hole 41, and the pin 71 is installed on the handlebar assembly 60 and passes through the through hole before being inserted into the insertion hole 31.

[0047] When the first locking mechanism 70 is unlocked, the support frame 50 and the handlebar assembly 60 can rotate relative to the sliding seat 40. That is, the connector moves within the arc groove 42 to realize the relative rotation of the sliding seat 40 and the handlebar assembly 60 with respect to the sliding seat 40. The arc groove 42 can also limit the rotational stroke of the support frame 50 and the handlebar assembly 60.

[0048] Furthermore, the seat frame 30 is also provided with a limiting seat 80, and the sliding seat 40 moves between the lower end of the seat frame 30 and the limiting seat 80 to prevent the sliding seat 40 from sliding off the seat frame 30.

[0049] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A gravity-folding bicycle frame, characterized in that, include: The base frame (10) has wheels (20) on the front and rear sides at the bottom. The seat frame (30) is hinged to the rear side of the base frame (10), and the seat frame (30) is provided with a sliding seat (40) that can move along it; The support frame (50) is hinged to the front side of the base frame (10) and the sliding seat (40); The handlebar assembly (60) and the support frame (50) are coaxially rotatably connected to the sliding seat (40), and the handlebar assembly (60) is connected to the support frame (50); A first locking mechanism (70) is used to lock the sliding seat (40) on the seat frame (30) so that the base frame (10), seat frame (30), support frame (50) and handlebar assembly (60) are in an unfolded state. When the first locking mechanism (70) is unlocked, the sliding seat (40) slides on the seat frame (30) under the action of gravity and drives the handlebar assembly (60), seat frame (30) and support frame (50) to rotate and fold on the base frame (10).

2. The gravity-folding frame according to claim 1, characterized in that, The handlebar assembly (60) includes an upper handlebar (61), a lower handlebar (62), a second locking mechanism (63), and a linkage unlocking mechanism (64). The lower handlebar (62) is hinged to the upper handlebar (61) and the sliding seat (40). The second locking mechanism (63) is used to lock the lower handlebar (62) and the upper handlebar (61) in the unfolded state. The linkage unlocking mechanism (64) is connected to the upper handlebar (61) and the second locking mechanism (63). After the second locking mechanism (63) is unlocked, the upper handlebar (61) rotates forward relative to the lower handlebar (62) to an angle. The upper handlebar (61) then unlocks the first locking mechanism (70) through the linkage unlocking mechanism (64). The upper handlebar (61), lower handlebar (62), seat frame (30), support frame (50), and sliding seat (40) fold onto the base frame (10) under the action of gravity.

3. The gravity-folding frame according to claim 2, characterized in that, The first locking mechanism (70) includes a pin (71) mounted on the handlebar (62) by an elastic element. The sliding seat (40) has a through hole (41), and the seat frame (30) has a socket (31). The pin (71) passes through the through hole (41) and is inserted into the socket (31).

4. The gravity-folding frame according to claim 3, characterized in that, The linkage unlocking mechanism (64) includes a slider (641) and a traction member. The slider (641) is movably installed in the lower handlebar (62) and connected to the upper handlebar (61) through a linkage structure. One end of the traction member is connected to the other end of the slider (641), and the other end extends along the interior of the lower handlebar (62) to connect with the pin (71). After the first locking mechanism (70) is unlocked, when the upper handlebar (61) rotates forward relative to the lower handlebar (62), the slider (641) moves under the action of the linkage structure and the traction member pulls the pin (71) out of the socket (31).

5. The gravity-folding frame according to claim 4, characterized in that, The linkage structure includes a guide member (642) and a guide groove (643) provided on the upper handlebar (61). The slider (641) is connected to the guide member (642). The guide member (642) extends into the guide groove (643) and can slide in the guide groove (643). When the upper handlebar (61) rotates forward under the action of external force, the guide groove (643) drives the slider (641) to move through the guide member (642).

6. The gravity-folding frame according to claim 1, characterized in that, The sliding seat (40) is provided with an arc-shaped groove (42). The support frame (50), the sliding seat (40) and the handlebar assembly (60) are coaxially rotatably connected. The center of the arc-shaped groove (42) coincides with the rotational connection center of the support frame (50), the sliding seat (40) and the handlebar assembly (60). The support frame (50) is provided with a first connecting hole (51), and the handlebar assembly (60) is provided with a second connecting hole (65). The connector passes through the arc-shaped groove (42) and is inserted into the first connecting hole (51) and the second connecting hole (65).

7. The gravity-folding frame according to claim 1, characterized in that, The seat frame (30) is also provided with a limiting seat (80), and the sliding seat (40) moves between the lower end of the seat frame (30) and the limiting seat (80).

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