Locking structure, frame and cart

Abstract

The utility model relates to the technical field of carts, and discloses a locking structure, a frame and a cart, the locking structure comprises at least one first locking assembly, and when the first locking assembly is in a locking state, the first locking assembly is inserted into the side wall of a first pipe fitting and the side wall of a sliding sleeve; when the first locking assembly is in the unlocking state, the first locking assembly is contained in the first pipe fitting. The at least one second locking assembly is arranged outside the first pipe fitting; when the second locking assembly is in the locking state, the second locking assembly and the exterior of the sliding sleeve are locked; when the second locking assembly is in the unlocking state, the second locking assembly is separated from the outside of the sliding sleeve. According to the locking structure, the safety of a baby carriage and other products is guaranteed through the at least one first locking assembly and the at least one second locking assembly, even if one locking point loses efficacy, the other locking point can still keep the locking state, and therefore the safety of the whole system is improved.

Description

Technical Field

[0001] This utility model relates to the field of trolley technology, specifically to a locking structure, a frame, and a trolley. Background Technology

[0002] Strollers are becoming increasingly popular in families with infants due to their convenience and comfort. Currently, to better meet people's needs for portability and storage, most strollers are designed with a foldable structure, and the stroller seat can be folded down along with the frame.

[0003] The front and rear leg tubes of a stroller are typically secured using a single-point locking mechanism such as a pin. This single-point locking mechanism is prone to failure under external impact or misoperation. If the single-point locking mechanism suddenly loosens, the stroller may fold unexpectedly, causing injury to the child riding in it. Utility Model Content

[0004] In view of this, the present invention provides a locking structure, a frame and a stroller to solve the problem that when a single-point locking structure is used to lock the front and rear leg tubes of a stroller, the single-point locking structure is prone to failure under external impact or misoperation.

[0005] In a first aspect, this utility model provides a locking structure, comprising:

[0006] At least one first locking component, when the first locking component is in the locked state, the first locking component is inserted into the side wall of the first pipe and the side wall of the sliding sleeve; when the first locking component is in the unlocked state, the first locking component is housed inside the first pipe.

[0007] At least one second locking component is provided on the outside of the first pipe fitting; when the second locking component is in the locked state, the second locking component locks with the outside of the sliding sleeve; when the second locking component is in the unlocked state, the second locking component disengages from the outside of the sliding sleeve.

[0008] When all the first and second locking components are simultaneously in the unlocked state, the sliding sleeve can slide relative to the first tube.

[0009] The aforementioned locking structure ensures the safety of products such as strollers through a dual or multiple locking design with at least one first locking component and at least one second locking component. The first locking component and the second locking component are set relatively independently, so even if one locking point fails, the other locking point can still remain locked, thereby improving the safety of the entire system.

[0010] When the product such as the baby carriage is in use (i.e. in the unfolded state), the product such as the baby carriage can be folded only when the first locking assembly and the second locking assembly are in the unlocked state at the same time, which can effectively prevent the product from being accidentally folded due to misoperation or other external forces, and avoid the situation that the user may be injured or inconvenienced.

[0011] In addition, the first locking assembly locks the sliding sleeve from the inside of the first pipe, and the second locking assembly locks the sliding sleeve from the outside of the first pipe, so that the sliding sleeve is locked from the inside and the outside at the same time, thereby ensuring the structural stability between the sliding sleeve and the first pipe.

[0012] In an optional embodiment, the first locking assembly is arranged inside the first pipe, and the first locking assembly has a fixed part, a movable part, and a first locking part. The fixed part is fixedly connected with the inner wall of the first pipe, the movable part elastically abuts against the inner wall of the first pipe, and the first locking part is arranged on the movable part. When the first locking assembly is in the locked state, the first locking part is inserted into the side wall of the first pipe and the side wall of the sliding sleeve. When the first locking assembly is in the unlocked state, the first locking part is accommodated inside the first pipe.

[0013] The first locking assembly described above, the movable part elastically abuts against the inner wall of the first pipe, and the movable part can automatically push the first locking part to move into the through hole formed in the side wall of the first pipe and the side wall of the sliding sleeve, thereby achieving the locking and positioning of the sliding sleeve and the first pipe.

[0014] In an optional embodiment, the first locking assembly includes:

[0015] The elastic sheet is arranged in a bent manner, one end of the elastic sheet is the fixed part, and the other end of the elastic sheet is the movable part.

[0016] In an optional embodiment, the first locking part is a locking head, and the locking head is arranged on the side of the movable part of the elastic sheet opposite to the inner wall of the first pipe. The locking head can pass through the second through hole on the first pipe and the first through hole on the sliding sleeve, thereby achieving the locking between the first pipe and the sliding sleeve. The elastic sheet keeps the locking head clamped into the first through hole of the sliding sleeve under the action of the elasticity of the material of the elastic sheet.

[0017] In an optional embodiment, the movable part of the elastic sheet is further provided with a pressing head. In the locked state of the first locking assembly, the pressing head extends from the first pipe. In the unlocked state of the first locking assembly, the pressing head is accommodated inside the first pipe.

[0018] The pressing head is exposed from the first pipe, and pressing is facilitated. When unlocking of the first locking assembly is required, the pressing head can be directly pressed to press the elastic sheet, thereby driving the locking head to be separated from the first pipe and the sliding sleeve, so that unlocking of the first locking assembly is more convenient.

[0019] In an alternative embodiment, the second locking assembly comprises a locking sheet;

[0020] One end of the locking sheet is provided as a second locking portion;

[0021] The middle part of the locking sheet is rotatably arranged on a rotating shaft positioning seat through a rotating shaft, and the rotating shaft positioning seat is arranged on the side wall of the first pipe;

[0022] The other end of the locking sheet is provided as an abutting portion, and a spring is arranged between the abutting portion and the outer wall of the first pipe.

[0023] When unlocking of the second locking assembly is required, the locking sheet can be directly rotated, and the second locking portion of the locking sheet is separated from the locking of the sliding sleeve; when locking of the second locking assembly is required, the locking sheet can be automatically released, and the locking sheet is restored to the locking state of the sliding sleeve under the elastic force of the spring.

[0024] In an alternative embodiment, the second locking portion is provided in a hook shape; in the locked state of the second locking assembly, the second locking portion is hooked with a locking pin arranged outside the sliding sleeve; in the unlocked state of the second locking assembly, the second locking portion is separated from the locking pin arranged outside the sliding sleeve. The second locking portion is hooked with the locking pin, which is more convenient for locking and unlocking of the second locking portion.

[0025] In an alternative embodiment, a mounting hole is arranged on the side wall of the locking sheet, and a folding webbing is arranged in the mounting hole to facilitate pulling of the locking sheet and rotation of the locking sheet.

[0026] In an alternative embodiment, the first locking assembly is provided with a row, and the second locking assembly is provided with a row, and the positions of the sliding sleeve locked by the first locking assembly and the positions of the sliding sleeve locked by the second locking assembly are located on both sides of the central axis of the sliding sleeve.

[0027] The first locking assembly and the second locking assembly constitute a two-row lock structure, the two sides of the sliding sleeve are locked by the first locking assembly and the second locking assembly, the sliding sleeve is locked from different directions, and the locking state between the sliding sleeve and the first pipe is more stable. Through the locking design distributed on both sides of the central axis of the sliding sleeve, support can be provided in multiple directions, and the overall rigidity of the structure is increased.

[0028] In a second aspect, the utility model also provides a vehicle frame, comprising:

[0029] two first tubes;

[0030] two second tubes, the top of the second tubes being hinged to the first tubes;

[0031] two third tubes, the bottom of the third tubes being hinged to the top of the second tubes;

[0032] two sliding sleeves, the sliding sleeves being sleeved on the first tubes, each of the sliding sleeves being locked with the first tubes through the locking structure;

[0033] two first connecting frames, one end of the first connecting frames being hinged to the sliding sleeves, the other end of the first connecting frames being hinged to the third tubes;

[0034] two second connecting frames, one end of the second connecting frames being hinged to the side walls of the second tubes, the other end of the second connecting frames being hinged to the first connecting frames.

[0035] The above frame can be folded and stored, so that the formed stroller is convenient to carry and space occupation rate is saved.

[0036] In a third aspect, the utility model also provides a stroller, which comprises:

[0037] the frame;

[0038] a seat, which is arranged on the two second tubes;

[0039] two first driving wheels, which are arranged on the bottom of the first tubes;

[0040] two second driving wheels, which are arranged on the bottom of the second tubes.

[0041] The above stroller has the same technical effects as the frame, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0043] Figure 1 a sectional view of the locking structure of the utility model in the locked state;

[0044] Figure 2The utility model provides a kind of sectional view when the first locking assembly in the locking structure provided by the utility model is in the unlocking state;

[0045] Figure 3 The utility model provides a kind of structure schematic diagram of locking structure;

[0046] Figure 4 The utility model provides a kind of structure schematic diagram when the locking structure shows pivot positioning seat;

[0047] Figure 5 The utility model provides a kind of structure schematic diagram of first locking assembly in the locking structure provided by the utility model;

[0048] Figure 6 The utility model provides a kind of structure schematic diagram of locking sheet in the locking structure provided by the utility model;

[0049] Figure 7 The utility model provides a kind of exploded view of sliding sleeve and first pipe fitting in the locking structure provided by the utility model;

[0050] Figure 8 The utility model provides a kind of structure schematic diagram of trolley;

[0051] Figure 9 The utility model provides a kind of structure schematic diagram of trolley; Figure 8 The utility model provides a kind of structure schematic diagram of trolley;

[0052] Mark explanation:

[0053] 100, first locking assembly, 101, spring sheet, 102, press head, 103, locking head;

[0054] 200, second locking assembly, 201, locking pin, 202, locking sheet, 2021, pivot, 2022, abutment, 2023, mounting hole, 2024, pivot positioning seat, 203, spring, 204, folding woven belt;

[0055] 300, frame, 301, sliding sleeve, 3011, first through hole, 3012, locking pin seat, 302, first pipe fitting, 3021, second through hole, 3022, third through hole, 303, second pipe fitting, 304, first connecting frame, 305, second connecting frame, 306, third pipe fitting;

[0056] 400, seat;

[0057] 500, handle;

[0058] 600, first drive wheel;

[0059] 700, second drive wheel. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0061] Baby carriages have been more and more widely applied in families with babies due to their convenience and comfort. At present, in order to better meet the portability and storage requirements of baby carriages, most baby carriages are designed as foldable structures, and the seats of the baby carriages can be folded with the frames.

[0062] The front leg pipe and the rear leg pipe of the baby carriage are usually fixed by using a single-point locking structure such as a latch. The single-point locking structure is prone to failure when subjected to external force impact or misoperation. If the single-point locking structure suddenly loosens, it may cause the baby carriage to fold unexpectedly, causing harm to the children riding on it.

[0063] Therefore, the utility model provides a locking structure, which uses at least one first locking assembly and at least one second locking assembly to lock and position the first pipe and the sliding sleeve, thereby avoiding the problems of poor locking stability of a locking assembly and easy failure under external force impact or misoperation.

[0064] The specific embodiments of the utility model will be described in detail below in combination with the locking structure of the first aspect of the utility model, the frame of the second aspect of the utility model and the stroller of the third aspect of the utility model.

[0065] According to the embodiments of the utility model, in the first aspect, a locking structure is provided, which is combined with Figures 1 to 7 As shown in the figure, it comprises at least one first locking assembly 100 and at least one second locking assembly 200.

[0066] When the first locking assembly 100 is in the locked state, the first locking assembly 100 is inserted into the side wall of the first pipe 302 and the side wall of the sliding sleeve 301; when the first locking assembly 100 is in the unlocked state, the first locking assembly 100 is accommodated inside the first pipe 302.

[0067] The second locking assembly 200 is arranged outside the first pipe 302; when the second locking assembly 200 is in the locked state, the second locking assembly 200 is locked with the outside of the sliding sleeve 301; when the second locking assembly 200 is in the unlocked state, the second locking assembly 200 is separated from the outside of the sliding sleeve 301.

[0068] When the first locking assembly 100 and the second locking assembly 200 are in the unlocked state at the same time, the sliding sleeve 301 can slide relative to the first pipe 302.

[0069] The locking structure is applied to the safety folding process of a baby carriage or similar equipment, and ensures the safety of the baby carriage or similar equipment through the double or multiple locking design of the at least one first locking assembly 100 and the at least one second locking assembly 200. The first locking assembly 100 and the second locking assembly 200 are arranged relatively independently. Even if one of the locking points fails, the other locking point can still remain in the locked state, thereby improving the safety of the entire system.

[0070] When the baby carriage or similar equipment is in the use state (i.e., the unfolded state), the baby carriage or similar equipment can be folded only when the first locking assembly 100 and the second locking assembly 200 are in the unlocked state at the same time. This can effectively prevent accidental folding caused by misoperation or other external forces, and avoid the situation that the user may be injured or inconvenienced.

[0071] In addition, the first locking assembly 100 locks the sliding sleeve 301 from the inside of the first pipe 302, and the second locking assembly 200 locks the sliding sleeve 301 from the outside of the first pipe 302, so that the sliding sleeve 301 is locked inside and outside the first pipe 302, thereby ensuring the structural stability between the sliding sleeve 301 and the first pipe 302.

[0072] In one embodiment, the first locking assembly 100 is arranged inside the first pipe 302. The first locking assembly 100 has a fixed part, a movable part, and a first locking part. The fixed part is fixedly connected to the inner wall of the first pipe 302. The movable part elastically abuts against the inner wall of the first pipe 302. The first locking part is arranged on the movable part. When the first locking assembly 100 is in the locked state, the first locking part is inserted into the side wall of the first pipe 302 and the side wall of the sliding sleeve 301. When the first locking assembly 100 is in the unlocked state, the first locking part is accommodated inside the first pipe 302. It should be noted that the movable part elastically abuts against the inner wall of the first pipe 302 means that the movable part is in close contact with the inner wall of the first pipe 302, and the movable part has a tendency to expand outward when accommodated in the first pipe 302. In this embodiment, the movable part elastically abuts against the inner wall of the first pipe 302. The movable part can automatically push the first locking part to move into the through hole formed in the side wall of the first pipe 302 and the side wall of the sliding sleeve 301, thereby achieving the locking and positioning of the sliding sleeve 301 and the first pipe 302.

[0073] In one embodiment, the first locking assembly 100 comprises a spring 101. The spring 101 is arranged in a bent manner, one end of the spring 101 is a fixed portion, and the other end of the spring 101 is a movable portion. The fixed portion of the spring 101 is fixedly connected with the inner wall of the first pipe 302, and the movable portion of the spring 101 abuts against the inner wall of the first pipe 302 and has a tendency to expand outward.

[0074] In one embodiment, the first locking portion is a locking head 103, which is arranged on the side of the movable portion of the spring 101 opposite to the inner wall of the first pipe 302. The locking head 103 can pass through the second through hole 3021 on the first pipe 302 and the first through hole 3011 on the sliding sleeve 301, so as to lock the first pipe 302 and the sliding sleeve 301. The spring 101 keeps the locking head 103 clamped into the first through hole 3011 of the sliding sleeve 301 under the elastic force of the material of the spring 101.

[0075] In the locked state of the first locking assembly 100, the locking head 103 is partially exposed or not exposed from the sliding sleeve 301, which makes it very inconvenient to press the locking head 103. In order to solve this problem, in one embodiment, a pressing head 102 is further arranged on the movable portion of the spring 101, so as to facilitate pressing the spring 101 and the locking head 103. In the locked state of the first locking assembly, the pressing head 102 extends from the third through hole 3022 of the first pipe 302; in the unlocked state of the first locking assembly, the pressing head 102 is accommodated in the first pipe 302. In this embodiment, the pressing head 102 is exposed from the first pipe 302, which facilitates pressing. When it is necessary to unlock the first locking assembly, the pressing head 102 can be directly pressed, which can press the spring 101, and then drive the locking head 103 to separate from the first pipe 302 and the sliding sleeve 301, so as to make the unlocking of the first locking assembly more convenient.

[0076] In one embodiment, the second locking assembly 200 is arranged outside the first pipe 302, and the second locking assembly 200 has a second locking portion. In the locked state of the second locking assembly 200, the second locking portion is locked with the outside of the sliding sleeve 301; in the unlocked state of the second locking assembly 200, the second locking portion is separated from the outside of the sliding sleeve 301.

[0077] The second locking assembly 200 comprises a locking sheet 202. One end of the locking sheet 202 is arranged as the second locking portion. In this embodiment, the second locking assembly 200 can be arranged in a sheet shape, or in other shapes and structures. In combination with the first locking assembly 100, the second locking assembly 200 can be arranged on the outside of the first pipe 302. Figure 4As shown, the middle part of the locking piece 202 is rotationally arranged on the pivot 2021 on the pivot positioning seat 2024, which is arranged on the sidewall of the first pipe 302. The other end of the locking piece 202 is arranged as the abutting part 2022, and the spring 203 is arranged between the abutting part 2022 and the outer wall of the first pipe 302. In this embodiment, when it is needed to unlock the second locking assembly 200, the locking piece 202 can be directly rotated, so that the second locking part of the locking piece 202 is separated from the locking of the sliding sleeve 301; when it is needed to lock the second locking assembly 200, the locking piece 202 can be automatically released, and the locking piece 202 is restored to the locking state of the sliding sleeve 301 under the elastic force of the spring 203.

[0078] In one embodiment, the second locking part is arranged in a hook shape. In the locking state of the second locking assembly 200, the second locking part is hooked with the locking pin 201 arranged outside the sliding sleeve 301. The locking pin 201 is arranged on the locking pin seat 3012 arranged outside the sliding sleeve 301. In the unlocking state of the second locking assembly 200, the second locking part is separated from the locking pin 201 arranged outside the sliding sleeve 301. In this embodiment, when it is needed to unlock the second locking assembly 200, the locking piece 202 can be directly rotated, so that the locking piece 202 is separated from the hooking of the locking pin 201; when it is needed to lock the second locking assembly 200, the locking piece 202 can be automatically released, and the locking piece 202 is restored to the state of hooking the locking pin 201 under the elastic force of the spring 203.

[0079] It should be noted that this embodiment only gives the form of the second locking part in the hooking, and the second locking part is not limited to the form of the hooking, but can also adopt other arrangement forms.

[0080] In one embodiment, the sidewall of the locking piece 202 is provided with the mounting hole 2023, and the folding woven belt 204 is arranged in the mounting hole 2023, so as to facilitate the pulling of the locking piece 202 and the rotation of the locking piece 202, and the unlocking of the locking piece 202 can be realized when the locking piece 202 is rotated.

[0081] In one embodiment, the first locking assembly 100 is provided with one row, and the second locking assembly 200 is provided with one row, and the position of the first locking assembly 100 locking the sliding sleeve 301 and the position of the second locking assembly 200 locking the sliding sleeve 301 are located on both sides of the central axis of the sliding sleeve 301. In this embodiment, the first locking assembly 100 and the second locking assembly 200 constitute a two-row locking structure, and the positions of the sliding sleeve 301 on both sides are locked by the first locking assembly 100 and the second locking assembly 200, respectively, from different directions to lock the sliding sleeve 301, so that the locking state between the sliding sleeve 301 and the first pipe 302 is more stable. By distributing the locking design on both sides of the central axis of the sliding sleeve 301, support can be provided in multiple directions, increasing the overall rigidity of the structure.

[0082] The above locking structure, taking the first locking assembly 100 provided with one row and the second locking assembly 200 provided with one row as an example, the specific working process is as follows:

[0083] In the normal state, the locking head 103 is clamped into the first through hole 3011 of the sliding sleeve, the second locking part of the locking sheet 202 is hooked with the locking pin 201 arranged outside the sliding sleeve 301, so that the sliding sleeve cannot slide along the first pipe 302 to fold.

[0084] When unlocking is needed, the pressing head 102 on the elastic sheet 101 is pressed, so that the elastic sheet head moves into the first pipe 302, is separated from the first through hole 3011 of the sliding sleeve, and maintains this state, at this time the sliding sleeve is separated from the elastic sheet locking, and then the locking sheet 202 is pulled to rotate through the folding belt 204, so that the locking sheet 202 is separated from the locking pin 201, and the folding of the vehicle platform is unlocked.

[0085] When the elastic sheet 101 and the locking sheet 202 are released, the locking sheet 202 is restored to the state of hooking the locking pin 201 under the action of the spring 203, and the elastic sheet 101 is clamped into the first through hole of the sliding sleeve again under the elastic action of the material itself, and the sliding sleeve 301 is locked.

[0086] According to the embodiment of the utility model, the second aspect provides a vehicle frame 300, which is combined with Figure 8 As shown in the figure, it comprises a first pipe 302, a second pipe 303, a third pipe 306, a sliding sleeve 301, a locking structure and a first connecting frame 304.

[0087] The first pipe 302 is provided with two, more specifically, the first pipe 302 is a rear leg pipe. The second pipe 303 is provided with two, the top of the second pipe 303 is hinged to the first pipe 302, more specifically, the second pipe 303 is a front leg pipe. The third pipe 306 is provided with two, the bottom of the third pipe 306 is hinged to the top of the second pipe 303, more specifically, the third pipe 306 is a hand pushing pipe. The top end of the two third pipes 306 is connected with a handle 500, the sliding sleeve 301 is provided with two, the sliding sleeve 301 is sleeved on the first pipe 302, and each sliding sleeve 301 is locked with the first pipe 302 through a locking structure. The folding belt 204 is arranged on the two locking pieces 202.

[0088] The first connecting frame 304 is provided with two, one end of the first connecting frame 304 is hinged to the sliding sleeve 301, and the other end of the first connecting frame 304 is hinged to the third pipe 306.

[0089] The above-mentioned frame 300 can be folded and stored, so that the formed stroller is convenient to carry as a whole, and the space occupancy rate is saved. When the first pipe 302, the second pipe 303 and the third pipe 306 need to be folded, the locking structure is used to unlock the first pipe 302 and the sliding sleeve 301, so that the sliding sleeve 301 can move along the first pipe 302, and when the sliding sleeve 301 moves, the third pipe 306 hinged to the sliding sleeve 301 can be driven to rotate through the first connecting frame 304, so that the third pipe 306 can be folded.

[0090] In one embodiment, the second connecting frame 305 is hinged to the side wall of the second pipe 303, the second connecting frame 305 is hinged to the bottom of the side wall of the first connecting frame 304, and then when the locking structure unlocks the first pipe 302 and the sliding sleeve 301, the first pipe 302 can rotate around the second pipe 303, so that the second pipe 303 can be folded.

[0091] According to the embodiment of the utility model, the third aspect provides a stroller, which is combined with Figures 1 to 9 As shown in the figure, comprising frame 300, seat 400, first drive wheel 600 and second drive wheel 700. The seat 400 is arranged on the two second pipes 303. The first drive wheel 600 is provided with two, and the first drive wheel 600 is arranged at the bottom of the first pipe 302. The second drive wheel 700 is provided with two, and the second drive wheel 700 is arranged at the bottom of the second pipe 303.

[0092] Among them, the stroller can be a baby carriage, also can be other forms of stroller or electric stroller, here does not limit its specific type.

[0093] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the appended claims.

Claims

1. A locking structure, characterized in that, include: At least one first locking component (100) is inserted into the side wall of the first pipe fitting (302) and the side wall of the sliding sleeve (301) when the first locking component (100) is in the locked state; when the first locking component (100) is in the unlocked state, the first locking component (100) is housed inside the first pipe fitting (302). At least one second locking component (200) is disposed on the outside of the first fitting (302); When the second locking component (200) is in the locked state, the second locking component (200) locks to the outside of the sliding sleeve (301); When the second locking component (200) is in the unlocked state, the second locking component (200) is disengaged from the outside of the sliding sleeve (301); When all the first locking components (100) and the second locking components (200) are in the unlocked state, the sliding sleeve (301) can slide relative to the first tube (302).

2. The locking structure according to claim 1, characterized in that, The first locking component (100) is disposed inside the first pipe fitting (302). The first locking component (100) has a fixed part, a movable part and a first locking part. The fixed part is fixedly connected to the inner wall of the first pipe fitting (302), the movable part is elastically abutting against the inner wall of the first pipe fitting (302), and the first locking part is disposed on the movable part. When the first locking component (100) is in the locked state, the first locking part is inserted into the side wall of the first pipe fitting (302) and the side wall of the sliding sleeve (301). When the first locking component (100) is in the unlocked state, the first locking part is housed inside the first pipe fitting (302).

3. The locking structure according to claim 2, characterized in that, The first locking component (100) includes: A spring (101) is bent, one end of which is the fixed part and the other end of which is the movable part.

4. The locking structure according to claim 3, characterized in that, The first locking part is a locking head (103), which is disposed on the side of the movable part of the spring piece (101) relative to the inner wall of the first tube (302).

5. The locking structure according to claim 3, characterized in that, The movable part of the spring (101) is also provided with a pressing head (102); when the first locking component is locked, the pressing head (102) extends out from the first tube (302); when the first locking component is unlocked, the pressing head (102) is stored inside the first tube (302).

6. The locking structure according to any one of claims 1-5, characterized in that, The second locking component (200) includes a locking piece (202); One end of the locking piece (202) is configured as a second locking part; The middle part of the locking piece (202) is rotatably mounted on the rotating shaft positioning seat (2024) via the rotating shaft (2021), and the rotating shaft positioning seat (2024) is mounted on the side wall of the first pipe fitting (302); The other end of the locking piece (202) is configured as an abutment part (2022), and a spring (203) is provided between the abutment part (2022) and the outer wall of the first tube (302).

7. The locking structure according to claim 6, characterized in that, The second locking part is configured as a hook; when the second locking component (200) is in the locked state, the second locking part is hooked with the locking pin (201) provided outside the slide sleeve (301); when the second locking component (200) is in the unlocked state, the second locking part is disengaged from the locking pin (201) provided outside the slide sleeve (301). And / or, the side wall of the locking piece (202) is provided with a mounting hole (2023), and a retractable webbing (204) is provided in the mounting hole (2023) to facilitate pulling the locking piece (202) and rotating the locking piece (202).

8. The locking structure according to any one of claims 1-5, characterized in that, The first locking component (100) is provided with one lock, and the second locking component (200) is provided with one lock. The position of the first locking component (100) locking the slide sleeve (301) and the position of the second locking component (200) locking the slide sleeve (301) are located on both sides of the central axis of the slide sleeve (301).

9. A vehicle frame, characterized in that, include: Two first fittings (302); Two second fittings (303), the tops of which are hinged to the first fitting (302); Two third pipe fittings (306), the bottom of which is hinged to the top of the second pipe fitting (303); Two sliding sleeves (301) are fitted onto the first pipe fitting (302), and each of the sliding sleeves (301) is locked to the first pipe fitting (302) by the locking structure according to any one of claims 1-8; Two first connecting brackets (304), one end of the first connecting bracket (304) is hinged to the sliding sleeve (301), and the other end of the first connecting bracket (304) is hinged to the third pipe fitting (306); Two second connecting brackets (305), one end of which is hinged to the side wall of the second pipe (303), and the other end of which is hinged to the first connecting bracket (304).

10. A trolley, characterized in that, include: The frame (300) as described in claim 9; A seat (400) is disposed on two second tubes (303); Two first drive wheels (600) are provided at the bottom of the first pipe fitting (302); Two second drive wheels (700) are located at the bottom of the second pipe fitting (303).

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