Toy vehicle and trailer connection structure

Abstract

The embodiment of the utility model provides a toy vehicle and a trailer connection structure thereof, wherein the trailer connection structure is used to connect the trailer to the rear end of the main body of the toy vehicle, and comprises a trailer arm whose one end is pivoted at the rear end of the main body by a rotating shaft and can rotate back and forth between an unfolded position and a folded position, and a first lock arranged on the trailer arm for cooperating with a first locking groove preset at the rear end of the main body when the trailer arm is rotated to the folded position to lock the trailer arm in the folded position, and a plug hole is also provided on the trailer arm for correspondingly plugging a plug post arranged at the front end of the trailer when the trailer arm is rotated to the unfolded position, and a second lock is also provided on the trailer arm for cooperating with a second locking groove preset on the plug post to lock the plug post in the plug hole. The utility model can be folded and stored inside the main body when the trailer is not needed, so as to reduce the overall length and improve the user experience.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of toy vehicles, and in particular to a toy vehicle and a trailer connection structure thereof. Background Art

[0002] In order to enable multiple users to ride and play on existing toy vehicles such as children's scooters and twisting cars, a trailer connected to the main body and moving synchronously is usually arranged at the rear of the toy vehicle, and both the main body and the trailer of the toy vehicle can be ridden by users. A trailer arm for installing the trailer is fixed at the rear of the main body of the existing toy vehicle. When the trailer is removed and the main body is used alone, the trailer arm cannot be folded and stored, and the trailer arm exposed from the rear of the main body makes the overall length of the main body too long, which affects the use of the main body of the toy vehicle alone and has a poor user experience. Utility Model Content

[0003] The technical problem to be solved by the embodiments of the utility model is to provide a trailer connection structure for a toy vehicle so that the toy vehicle can be folded and stored inside the main vehicle body when the trailer is not needed, thereby reducing the overall length and improving the user experience.

[0004] A further technical problem to be solved by the embodiments of the utility model is to provide a toy vehicle so that it can be folded and stored inside the main body when a trailer is not needed, thereby reducing the overall length and improving the user experience.

[0005] To solve the above technical problems, the embodiment of the utility model first provides the following technical solutions: a trailer connection structure of a toy vehicle, used for connecting the trailer to the rear end of the main body of the toy vehicle, the trailer connection structure comprising a trailer arm having one end pivotally mounted on the rear end of the main body by means of a rotating shaft and capable of rotating back and forth between an unfolded position and a folded position, and a first lock arranged on the trailer arm for cooperating with a first locking groove preset in the rear end of the main body when the trailer arm is rotated to the folded position to lock the trailer arm in the folded position, the trailer arm also being provided with a socket for correspondingly plugging in a plug-in column arranged at the front end of the trailer when the trailer arm is rotated to the unfolded position, the trailer arm also being provided with a second lock which cooperates with a second locking groove preset on the plug-in column to lock the plug-in column in the socket.

[0006] Furthermore, the first lock includes a locking rod which is slidably assembled on the trailer arm and has a first locking tongue formed at one end for correspondingly inserting into the first locking groove, a first elastic element which is respectively abutted against the trailer arm and the locking rod at both ends to provide elastic force to keep the locking rod in a locked position, and an operating member connected to the locking rod for driving the locking rod to an unlocked position.

[0007] Furthermore, the trailer arm has a accommodating cavity inside and a first opening and a second opening are respectively provided on two side surfaces, the first lock is assembled in the accommodating cavity and the first locking tongue is opposite to the first opening and the operating member is exposed through the second opening, and a guide groove for guiding the locking rod to slide is provided in the accommodating cavity.

[0008] Furthermore, the socket is communicated with the accommodating cavity, and the second lock includes a locking hole formed in the middle section of the locking rod and corresponding to the socket on the trailer arm, and a second locking tongue formed on a side hole wall of the locking hole for correspondingly inserting into the second locking groove.

[0009] Furthermore, a storage groove is provided at the rear end portion of the main vehicle body, and the front end portion of the trailer arm is pivotally connected to the bottom end portion of the storage groove, and the storage groove has a predetermined depth to accommodate the trailer arm when the trailer arm is rotated to the folded position. A predetermined position of a groove side wall of the storage groove is also correspondingly recessed to form the first locking groove, and the second opening is opened on a side surface of the trailer arm that is away from the main vehicle body when the trailer arm is rotated to the folded position.

[0010] Furthermore, the trailer connection structure also includes a tail cover for correspondingly covering the storage groove and preventing the trailer arm from rotating when the trailer arm rotates to the unfolded position, and an elastic hook is provided on the side of the tail cover at a position corresponding to the first locking groove, which cooperates with the first locking groove to lock the tail cover, and a positioning pin is provided at the bottom of the tail cover for inserting into a first positioning hole preset in the front end of the trailer arm.

[0011] Furthermore, the trailer connection structure also includes a safety lock for preventing the trailer arm from rotating when the trailer arm is rotated to the deployed position, the safety lock including a latch assembled in a preset slide groove on the trailer arm, a second elastic element at opposite ends respectively abutting the latch and the trailer arm for applying elastic force to the latch so that one end of the latch is correspondingly inserted into a second positioning hole correspondingly opened on the main vehicle body, and a linkage member linked to the lock rod to drive the latch to overcome the elastic force of the second elastic element and withdraw from the latch hole under the drive of the lock rod, a middle section of the linkage member is pivotally connected to the cavity wall of the accommodating cavity, one end of the linkage member is sleeved on the latch and abuts and cooperates with a stop step correspondingly protruding on the outer side wall of the latch, and an abutting inclined surface is provided at the other end, a push portion correspondingly arranged on the lock rod correspondingly pushes the abutting inclined surface when the lock rod slides to the unlocking position, and the stop step on the latch is pushed by the linkage member so that the latch withdraws from the second positioning hole.

[0012] Furthermore, the second opening is provided on a side surface of the trailer arm facing away from the main vehicle body and on both side surfaces in a direction parallel to the rotating axis, and the operating member includes a first pushing block having one end connected to the locking rod and the other end extending to the outside through the second opening provided on the side surface of the trailer arm facing away from the main vehicle body, and a second pushing block formed with a corresponding outward protrusion from the middle section of the locking rod and correspondingly extending into the second openings provided on the both side surfaces of the trailer arm in a direction parallel to the rotating axis.

[0013] Furthermore, one end of the trailer arm pivotally connected to the main vehicle body is also provided with a travel limiting protrusion which abuts against a preset limit platform at the rear end of the main vehicle body when the trailer arm is rotated to the unfolded position to limit the rotation travel of the trailer arm; the trailer connection structure also includes a stop structure respectively arranged on the trailer arm and the plug-in column to prevent the trailer from rotating around the central axis of the plug-in column.

[0014] On the other hand, in order to solve the above-mentioned further technical problems, the embodiments of the utility model further provide the following technical solutions: a toy vehicle, comprising a main body and a trailer connected to the rear of the main body, wherein the trailer and the main body are detachably connected via a trailer connection structure as described in any of the above-mentioned embodiments.

[0015] By adopting the above technical solution, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model pivots the trailer arm at the rear end of the main vehicle body by means of a rotating shaft, and a locking rod with a first locking tongue is provided on the trailer arm. When it is not needed to be used in conjunction with the trailer, the trailer arm can be rotated to a folded position for storage, and the first lock of the locking rod is correspondingly locked and fixed with the first locking groove at the rear end of the main vehicle body; and when the trailer needs to be assembled, the first lock is disengaged from the first locking groove to unlock, and the trailer arm is rotated to the unfolded position, and the plug-in column on the trailer passes through the plug hole on the trailer arm and is correspondingly locked and fixed with the second lock to complete the assembly of the trailer. The embodiment of the utility model can be folded and stored inside the main vehicle body when the trailer is not needed, so as to reduce the overall length and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of an optional embodiment of the trailer connection structure of the toy vehicle of the utility model used in combination with a trailer.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of an optional embodiment of the trailer connection structure of the toy vehicle of the utility model when the trailer is removed and the trailer arm is in the unfolded position.

[0018] Figure 3It is a three-dimensional structural schematic diagram of an optional embodiment of the trailer connection structure of the toy vehicle of the utility model when the trailer arm is in a folded position.

[0019] Figure 4 The utility model is a schematic diagram of a split three-dimensional structure of an optional embodiment of the trailer connection structure of the toy vehicle.

[0020] Figure 5 It is a schematic diagram of a partial three-dimensional structure of a trailer from a bottom-up perspective of an optional embodiment of the trailer connection structure of the toy vehicle of the utility model.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of a bottom shell in a trailer arm of an optional embodiment of the trailer connection structure of a toy vehicle of the utility model.

[0022] Figure 7 The utility model is a schematic cross-sectional structure diagram of an optional embodiment of the trailer connection structure of the toy vehicle used in combination with a trailer.

[0023] Figure 8 The utility model is a schematic cross-sectional structure diagram of an optional embodiment of the trailer connection structure of the toy vehicle when the trailer is removed and the trailer arm is in a folded position.

[0024] Fig. 9 It is a schematic diagram of the disassembled three-dimensional structure of another optional embodiment of the trailer connection structure of the toy vehicle of the utility model.

[0025] Fig.10 It is a cross-sectional structural schematic diagram of another optional embodiment of the trailer connection structure of the toy vehicle of the utility model.

[0026] Fig.11 It is a schematic diagram of a disassembled three-dimensional structure with an end cover of an optional embodiment of the trailer connection structure of the toy vehicle of the utility model.

[0027] Fig.12 The utility model is a longitudinal section structure schematic diagram with an end cover of an optional embodiment of the trailer connection structure of the toy vehicle. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present invention may be combined with each other without conflict.

[0029] like Figure 1-Figure 8As shown, an optional embodiment of the utility model provides a trailer connection structure of a toy vehicle, which is used to connect a trailer B to the rear end of a main body A of the toy vehicle, and the trailer connection structure includes a trailer arm 1, one end of which is pivoted to the rear end of the main body A by means of a rotating shaft 10 and can rotate back and forth between an unfolded position and a folded position, and a first lock 3 is arranged on the trailer arm 1 for cooperating with a preset first locking groove 20 at the rear end of the main body A when the trailer arm 1 is rotated to the folded position to lock the trailer arm 1 in the folded position, and a socket 11 is also provided on the trailer arm 1 for correspondingly plugging in a plug-in column 8 arranged at the front end of the trailer B when the trailer arm 1 is rotated to the unfolded position, and a second lock 12 is also provided on the trailer arm 1 for cooperating with a preset second locking groove 81 on the plug-in column 8 to lock the plug-in column 8 in the socket 11.

[0030] In the embodiment of the utility model, the trailer arm 1 is pivotally mounted at the rear end of the main vehicle body A by means of the rotating shaft 10, and a locking rod 31 having a first lock 3 is provided on the trailer arm 1. When it is not needed to be used in conjunction with the trailer B, the trailer arm 1 can be rotated to a folded position for storage, and the first lock 3 of the locking rod 31 is correspondingly locked and fixed with the first lock groove 20 at the rear end of the main vehicle body A; and when it is necessary to assemble the trailer B, the first lock 3 is disengaged and unlocked from the first lock groove 20, and the trailer arm 1 is rotated to an unfolded position, and the plug-in column 8 on the trailer B passes through the insertion hole 11 on the trailer arm 1 and is correspondingly locked and fixed with the second lock 12, thereby completing the assembly of the trailer B. The embodiment of the utility model can be folded and stored inside the main vehicle body A when the trailer B is not needed, so as to reduce the overall length and improve the user experience.

[0031] In another optional embodiment of the present invention, Figure 1-Figure 8As shown, the first lock 3 comprises a lock rod 31 which is slidably assembled on the trailer arm 1 and has one end formed with a first lock rod 31 for correspondingly inserting into the first lock groove 20, a first elastic element 33 whose two ends respectively abut against the trailer arm 1 and the lock rod 31 to provide elastic force to keep the lock rod 31 in the locked position, and an operating member 35 connected to the lock rod 31 for driving the lock rod 31 to the unlocked position. The first lock 3 of this embodiment is specifically configured as the lock rod 31, the first elastic element 33 and the operating member 35. In actual application, the lock rod 31 is driven to move to the unlocked position by the operating member 35. At this time, the first elastic element 33 is compressed and deformed, and the lock rod 31 can be correspondingly disengaged from the first lock 3 in the first lock groove 20 to unlock, so as to perform the subsequent unfolding operation of the trailer arm 1. When the operating member 35 is released, the first elastic element 33 causes the lock rod 31 to reset. Therefore, the first lock 3 can effectively complete the locking work of the trailer arm 1 by setting the above structure. In a specific implementation, the first lock 3 can also be configured as a lock hook with elastic deformation capability to lock and match the first lock slot 20. In a specific implementation, the end of the first lock tongue 311 is provided with a first guiding inclined surface 3111 for pushing the lock rod 31 to overcome the elastic force of the first elastic element 33 and move around to allow the first lock tongue 311 to pass over the slot edge and be inserted into the first lock slot 20 when the trailer arm 1 rotates toward the folded position.

[0032] In another optional embodiment of the present invention, Figure 1-Figure 8 As shown, the trailer arm 1 has a receiving cavity 13 inside and a first opening 14 and a second opening 15 are respectively provided on two sides. The first lock 3 is assembled in the receiving cavity 13 and the locking rod 31 faces the first opening 14 and the operating member 35 is exposed through the second opening 15. A guide groove 130 for guiding the sliding of the locking rod 31 is provided in the receiving cavity 13. In this embodiment, by installing the first lock 3 in the receiving cavity 13 inside the trailer arm 1 and correspondingly providing the first opening 14 on the receiving cavity 13, it is convenient for the first locking tongue 311 to extend and retract during the locking process, and the structure is more compact. In addition, the receiving cavity 13 is provided with a guide groove 130 for guiding the sliding of the locking rod 31, so as to ensure that the trailer arm 1 can be accurately locked and fixed. In addition, the receiving cavity 13 is also provided with a second opening 15, so that the exposed operating member 35 can be connected and fixed with the internal components through the second opening 15. In a specific implementation, the trailer arm 1 is longitudinally elongated and one end in the longitudinal direction is pivotally connected to the rear end of the main vehicle body A. The first opening 14 is formed on the free end surface of the trailer arm 1. The trailer arm 1 includes a bottom shell 1a and a top cover 1b that are interlocked and spliced ​​with each other, and a receiving cavity 13 for assembling the first lock 3 is formed between the bottom shell 1a and the top cover 1b.

[0033] In another optional embodiment of the present invention, Figure 1-Figure 8 As shown, the insertion hole 11 is connected with the accommodating cavity 13, and the second lock 12 includes a locking hole 121 formed in the middle section of the locking rod 31 and corresponding to the insertion hole 11 on the trailer arm 1, and a second locking tongue 123 formed on a side hole wall of the locking hole 121 for correspondingly inserting into the second locking groove 81. In this embodiment, the locking hole 121 is provided in the middle section of the locking rod 31 and corresponding to the insertion hole 11 on the trailer arm 1, and the second locking tongue 123 is provided on a side hole wall of the locking hole 121, so that the second locking tongue 123 can be integrated on the locking rod 31, so that the locking rod 31 can correspondingly complete the locking work of the first locking tongue 311 and the second locking tongue 123, and the structure is more compact, which is conducive to saving installation space. In a specific implementation, the end of the second locking tongue 123 is provided with a second guiding slope 1231 which is used to push the locking rod 31 to overcome the elastic force of the first elastic element and avoid the second locking tongue 123 passing over the bottom end of the plug-in column 8 and inserted into the second locking groove 81 during the process of inserting the plug-in column 8 into the plug-in hole 11.

[0034] In another optional embodiment of the present invention, Figure 1-Figure 8 As shown, a receiving groove 2 is provided at the rear end of the main vehicle body A, and the front end of the trailer arm 1 is pivotally connected to a pivot hole 26 opened at the bottom end of the receiving groove 2. The receiving groove 2 has a predetermined depth to accommodate the trailer arm 1 when the trailer arm 1 is rotated to the folded position. A predetermined position of a groove side wall of the receiving groove 2 is also correspondingly recessed to form the first locking groove 20, and the second opening 15 is opened on a side of the trailer arm 1 that is away from the main vehicle body A when the trailer arm 1 is rotated to the folded position. In this embodiment, a storage groove 2 is further provided at the rear end of the main body A to facilitate the storage of the trailer arm 1 in the folded position. The overall appearance of the main body A is more concise, and it is also convenient for the main body A of the toy vehicle to be used alone; the first locking groove 20 is formed by a corresponding depression at a predetermined position on a groove side wall of the storage groove 2, so that the structure is compact and the first locking groove 20 can be effectively hidden, and the product appearance is more simple and beautiful; in addition, the second opening 15 is provided on a side of the trailer arm 1 that is away from the main body A when it is rotated to the folded position, so that the operating member 35 can be correspondingly located on the side away from the main body A, which is convenient for users to operate.

[0035] In another optional embodiment of the present invention, Fig.11 and Fig.12As shown, the trailer connection structure further includes a tail cover 4 for correspondingly covering the storage groove 2 and preventing the rotation of the trailer arm 1 when the trailer arm 1 rotates to the unfolded position, and an elastic hook 41 is provided at a position corresponding to the first locking groove 20 on the side of the tail cover 4, which cooperates with the first locking groove 20 to lock the tail cover 4, and a positioning pin 43 is provided at the bottom of the tail cover 4 for inserting into the first positioning hole 19 preset at the front end of the trailer arm 1. The trailer connection structure of this embodiment is further provided with a tail cover 4, and when the toy vehicle uses the trailer B, and the trailer arm 1 is rotated from the storage groove 2 to the unfolded state, the tail cover 4 can be fixed in the storage groove 2 through the elastic hook 41 and the positioning pin 43, so that the tail cover 4 can limit the trailer arm 1 to prevent the trailer arm 1 from rotating accidentally, and the tail cover 4 can also cover the opening of the storage groove 2 to prevent external foreign matter from entering the storage groove 2.

[0036] In another optional embodiment of the present invention, Fig. 9 and Fig.10As shown, the trailer connection structure also includes a safety lock 5 for preventing the trailer arm 1 from rotating when the trailer arm 1 rotates to the unfolded position, the safety lock 5 includes a latch 51 assembled in a preset slide groove 17 on the trailer arm 1, a second elastic element 52 at opposite ends respectively abutting against the latch 51 and the trailer arm 1 for applying elastic force to the latch 51 so that one end of the latch 51 is correspondingly inserted into a second positioning hole 21 correspondingly opened on the main vehicle body A, and a second elastic element 52 arranged in conjunction with the lock rod 31 so that the latch 51 is driven by the lock rod 31 to overcome the second elastic element 52 The linking member 53 is elastically withdrawn from the hole of the latch pin 51, and the middle section of the linking member 53 is pivotally connected to the cavity wall of the accommodating cavity 13. One end of the linking member 53 is sleeved on the latch pin 51 and abuts against a stop step 511 correspondingly protruding on the outer wall of the latch pin 51, and an abutting inclined surface 531 is provided at the other end thereof. The locking rod 31 is correspondingly provided with a corresponding abutting inclined surface 531, and when the locking rod 31 slides toward the unlocking position, the stop step 511 on the latch pin 51 is pushed by the linking member 53, so that the latch pin 51 withdraws from the abutting portion 317 of the second positioning hole 21. The trailer connection structure of this embodiment is further provided with a safety lock 5 to prevent the trailer arm 1 from accidentally rotating in the unfolded position or the folded position, and further ensure the stability of the trailer arm 1. In practical applications, the safety lock 5 specifically includes a latch 51, a second elastic element 52 and a linkage 53. One end of the linkage 53 is sleeved on the latch 51 and abuts against a stop step 511 formed by a corresponding protrusion on the outer side wall of the latch 51, and an abutting inclined surface 531 is provided at the other end. When the push portion 317 of the lock rod 31 is driven by an external force, the lock The rod 31 pushes against the abutting inclined surface 531, and the connecting member 53 synchronously pushes the stopping step 511 on the latch 51, and the second elastic element 52 retracts accordingly, so that the latch 51 can be disengaged from the second positioning hole 21 to complete the unlocking, and the trailer arm 1 can be rotated; and when the external force of the locking rod 31 is cancelled, the second elastic element 52 is reset so that one end of the latch 51 is correspondingly inserted into the second positioning hole 21 on the main vehicle body A, so that the trailer arm 1 can be locked and the trailer arm 1 cannot rotate, thereby effectively ensuring the normal operation of the toy vehicle.

[0037] In another optional embodiment of the present invention, Figure 9-11As shown, the second opening 15 is provided on one side of the trailer arm 1 away from the main vehicle body A and on both sides of the side in the direction parallel to the rotating shaft 10, and the operating member 35 includes a first push block 35a, one end of which is connected to the locking rod 31 and the other end of which extends to the outside through the second opening 15 provided on the side of the trailer arm 1 away from the main vehicle body A, and a second push block 35b, which is formed by correspondingly protruding outward from the middle section of the locking rod 31 and correspondingly extends into the second opening 15 provided on both sides of the trailer arm 1 in the direction parallel to the rotating shaft 10. The operating member 35 of this embodiment is provided with a first push block 35a and a second push block 35b, which are respectively assembled on the second opening 15 on one side of the trailer arm 1 away from the main vehicle body A and on both sides of the side in the direction parallel to the rotating shaft 10, so that when it is inconvenient for the user to operate one of the push blocks, the user can also operate through the other push block, which is convenient for the user to use flexibly. In specific implementation, the first push block 35a can be both beautiful and easy to operate by optimizing the shape of the part extending outside the second opening 15. For the second push block 35b, an anti-slip texture can be formed on the outer surface of the second push block 35b to facilitate operation.

[0038] In another optional embodiment of the present invention, Figure 4 , Figure 7 and Fig.12 As shown, one end of the trailer arm 1 pivotally connected to the main vehicle body A is also provided with a travel limiting protrusion 18 which abuts against a preset limit platform 6 at the rear end of the main vehicle body A when the trailer arm 1 rotates to the deployed position to limit the rotational travel of the trailer arm 1; the trailer connection structure also includes a rotation-stopping structure 7 which is respectively arranged on the trailer arm 1 and the plug-in column 8 to prevent the trailer B from rotating around the central axis of the plug-in column 8. The trailer arm 1 of this embodiment is provided with a travel limiting protrusion 18 which abuts against a preset limit platform 6 at the rear end of the main vehicle body A to ensure that the trailer arm 1 rotates smoothly to the deployed position; in addition, the trailer connection structure is further provided with a rotation-stopping structure 7 on the trailer arm 1 and the plug-in column 8 to effectively prevent relative rotation between the trailer B and the trailer arm 1 and ensure a stable connection between the trailer B and the trailer arm 1. In specific implementation, the specific structure of the rotation-stopping structure 7, in addition to the specific structure as shown in the figure, is as follows: Figure 4 and Figure 7 In addition to the structure shown, a limiting groove or a limiting convex strip extending in the axial direction may also be provided on the side wall of the plug-in column 8, and a limiting convex strip or a limiting groove may be provided on the inner wall of the plug-in hole 11 accordingly.

[0039] On the other hand, Figure 1-Figure 12As shown, the embodiment of the utility model further provides a toy vehicle, including a main body A and a trailer B connected to the rear of the main body A, wherein the trailer B and the main body A are detachably connected via a trailer connection structure as described in any of the above embodiments. In this embodiment, the toy vehicle adopts the trailer connection structure described in each of the above embodiments, and can be folded and stored inside the main body A when the trailer B is not needed, so as to reduce the overall length and improve the use experience.

[0040] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many variations without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A trailer connection structure for a toy vehicle, used to connect a trailer to the rear end of a main body of the toy vehicle, characterized in that: The trailer connection structure includes a trailer arm, one end of which is pivoted to the rear end of the main vehicle body by a rotating shaft and can be rotated back and forth between an unfolded position and a folded position, and a first lock arranged on the trailer arm for cooperating with a preset first locking groove at the rear end of the main vehicle body when the trailer arm is rotated to the folded position to lock the trailer arm in the folded position. The trailer arm is also provided with a socket for correspondingly plugging in a plug-in column arranged at the front end of the trailer when the trailer arm is rotated to the unfolded position. The trailer arm is also provided with a second lock that cooperates with a preset second locking groove on the plug-in column to lock the plug-in column in the socket.

2. The trailer connection structure of a toy vehicle according to claim 1, characterized in that: The first lock includes a locking rod which is slidably assembled on the trailer arm and has a first locking tongue formed at one end for correspondingly inserting into the first locking groove, a first elastic element which is respectively abutted against the trailer arm and the locking rod at both ends to provide elastic force to keep the locking rod in a locked position, and an operating member connected to the locking rod for driving the locking rod to an unlocked position.

3. The trailer connection structure of a toy vehicle according to claim 2, characterized in that: The trailer arm has a accommodating cavity inside and a first opening and a second opening respectively on two side surfaces. The first lock is assembled in the accommodating cavity and the first locking tongue faces the first opening while the operating member is exposed through the second opening. A guide groove for guiding the locking rod to slide is provided in the accommodating cavity.

4. The trailer connection structure of a toy vehicle according to claim 3, characterized in that: The insertion hole is communicated with the accommodating cavity, and the second lock comprises a locking hole formed in the middle section of the locking rod and corresponding to the insertion hole on the trailer arm, and a second locking tongue formed on a side hole wall of the locking hole for correspondingly inserting into the second locking groove.

5. The trailer connection structure of a toy vehicle according to claim 3, characterized in that: A storage groove is provided at the rear end portion of the main vehicle body, and the front end portion of the trailer arm is pivotally connected to the bottom end portion of the storage groove. The storage groove has a predetermined depth to accommodate the trailer arm when the trailer arm is rotated to the folded position. A predetermined position of a groove side wall of the storage groove is also correspondingly recessed to form the first locking groove, and the second opening is opened on a side surface of the trailer arm that is away from the main vehicle body when the trailer arm is rotated to the folded position.

6. The trailer connection structure of a toy vehicle according to claim 5, characterized in that: The trailer connection structure also includes a tail cover for correspondingly covering the storage groove and preventing the trailer arm from rotating when the trailer arm rotates to the unfolded position, an elastic hook is provided at a position on the side of the tail cover corresponding to the first locking groove, and the elastic hook cooperates with the first locking groove to lock the tail cover, and a positioning pin is provided at the bottom of the tail cover for inserting into a first positioning hole preset at the front end of the trailer arm.

7. The trailer connection structure of a toy vehicle according to claim 3, characterized in that: The trailer connection structure also includes a safety lock for preventing the trailer arm from rotating when the trailer arm rotates to the deployed position, the safety lock including a pin assembled in a preset sliding groove on the trailer arm, a second elastic element at opposite ends respectively abutting the pin and the trailer arm for applying elastic force to the pin so that one end of the pin is correspondingly inserted into a second positioning hole correspondingly opened on the main vehicle body, and a linkage member linked to the lock rod to drive the pin to overcome the elastic force of the second elastic element and withdraw from the pin hole under the drive of the lock rod, the middle section of the linkage member is pivotally connected to the cavity wall of the accommodating cavity, one end of the linkage member is sleeved on the pin and abuts and cooperates with a stop step correspondingly protruding on the outer side wall of the pin, and an abutting inclined surface is provided relative to the other end, and a push portion correspondingly arranged on the lock rod pushes the abutting inclined surface when the lock rod slides to the unlocking position, and the stop step on the pin is pushed by the linkage member so that the pin withdraws from the second positioning hole.

8. The trailer connection structure of a toy vehicle according to claim 3, characterized in that: The second opening is formed on a side surface of the trailer arm facing away from the main vehicle body and on both side surfaces in a direction parallel to the rotating shaft, and the operating member includes a first pushing block having one end connected to the locking rod and the other end extending to the outside through the second opening formed on the side surface of the trailer arm facing away from the main vehicle body, and a second pushing block formed by a corresponding outward protrusion from the middle section of the locking rod and correspondingly extending into the second openings formed on the both side surfaces of the trailer arm in a direction parallel to the rotating shaft.

9. The trailer connection structure of a toy vehicle according to claim 1, characterized in that: The end of the trailer arm pivotally connected to the main vehicle body is also provided with a travel limiting protrusion which abuts against a preset limit platform at the rear end of the main vehicle body when the trailer arm is rotated to the unfolded position to limit the rotation travel of the trailer arm; the trailer connection structure also includes a stop structure respectively arranged on the trailer arm and the plug-in column to prevent the trailer from rotating around the central axis of the plug-in column.

10. A toy vehicle, comprising a main body and a trailer connected to the rear of the main body, characterized in that: The trailer and the main vehicle body are detachably connected via the trailer connection structure as described in any one of claims 1-9.

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