A children's tricycle

Abstract

The present invention discloses a children's tricycle, which has a vertical symmetry plane SP and can be moved from an unfolded position to a folded position, and comprises a support frame, wherein the front end of the support frame is connected to a front support frame, the front support frame is connected to a steering device, the steering device comprises a rotating handle and a front wheel assembly, the rear end of the support frame is connected to a rear support frame, the rear support frame comprises a frame body, a seat is arranged on the frame body, a left support part and a right support part arranged on both sides of the vertical symmetry plane SP are connected to the frame body, the left support part is rotatably connected to the frame body around a third axis C, the left support part comprises a left rear leg and a left rear wheel arranged at the lower end of the left rear leg, the right support part is rotatably connected to the frame body around a fourth axis D, the right support part comprises a right rear leg and a right rear wheel arranged at the lower end of the right rear leg. The purpose of the present invention is to overcome the deficiencies of the prior art and provide a children's tricycle with simple folding operation and small volume after folding.

Description

[Technical field]

[0001] The invention relates to a children's tricycle. [Background technology]

[0002] At present, three-wheeled baby carriages have become a common product used by children during their growth. Most of the existing children's tricycles cannot be folded, and even if some can be folded, the folding operation is relatively troublesome, and the folding structure is relatively complicated, and the folding effect is not ideal, and the problem of large volume still exists after folding.

[0003] Therefore, the present invention is just produced based on the above shortcomings. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a children's tricycle which is easy to fold and has a small volume after folding.

[0005] The present invention is achieved through the following technical solutions:

[0006] A children's tricycle has a vertical symmetry plane SP and can be moved from an unfolded position to a folded position, characterized in that it includes a support frame 1, a front support frame 2 that can rotate relative to the support frame 1 around a first axis A is connected to the front support frame 2, a steering device 3 is connected to the front support frame 2, and the steering device 3 includes a rotating handle 31 connected to the upper end of the front support frame 2, a front wheel assembly 32 is connected to the lower end of the front support frame 2, and a rear support frame 4 is connected to the rear end of the support frame 1, and the rear support frame 4 includes a rotating handle 31 connected to the rear end of the support frame 1 around a second axis B. A frame 41, wherein a seat 45 is provided on the frame 41, and the frame 41 is further connected with a left support portion 42 and a right support portion 43 arranged on both sides of a vertical symmetry plane SP, wherein the left support portion 42 is rotatably connected to the frame 41 around a third axis C, wherein the left support portion 42 includes a left rear leg 421 and a left rear wheel 422 arranged at the lower end of the left rear leg 421, and wherein the right support portion 43 is rotatably connected to the frame 41 around a fourth axis D, wherein the right support portion 43 includes a right rear leg 431 and a right rear wheel 432 arranged at the lower end of the right rear leg 431;

[0007] A first locking mechanism 6 is provided between the frame body 41 and the support frame 1, which can lock the two together. A second locking mechanism 7 is provided between the frame body 41 and the left rear leg 421 and the right rear leg 431, which can lock the left rear leg 421 and the right rear leg 431 on the frame body 41 and can be unlocked by linkage with the first locking mechanism 6 when the first locking mechanism 6 is unlocked. An operating component 451 that can control the unlocking of the first locking mechanism 6 is also provided on the rear support frame 4.

[0008] The children's tricycle as described above is characterized in that: the left rear leg 421 includes a left rear leg frame 4211 and a left rotating piece 4212 connected to the left rear leg frame 4211 and rotatably connected to the frame body 41 around a third axis C; the right rear leg 431 includes a right rear leg frame 4311 and a right rotating piece 4312 connected to the right rear leg frame 4311 and rotatably connected to the frame body 41 around a fourth axis D; a linkage device 44 is provided between the left rear leg frame 4211 and the right rear leg frame 4311, which can enable the left rear leg frame 4211 and the right rear leg frame 4311 to rotate relative to the frame body 41 when the left rotating piece 4212 or the right rotating piece 4312 rotates relative to the frame body 41.

[0009] The children's tricycle as described above is characterized in that: the linkage device 44 includes a convex tooth 441 arranged on the left rear leg frame 4211, and the right rear leg frame 4311 is provided with a tooth groove 442 that can cooperate with the convex tooth 441 to enable the right rear leg frame 4311 to mesh with the left rear leg frame 4211 for transmission.

[0010] The children's tricycle as described above is characterized in that: the left rotating piece 4212 is provided with a first unfolding position 42121, the right rotating piece 4312 is provided with a second unfolding position 43121, and when the second locking mechanism 7 is locked with the first unfolding position 42121 and the second unfolding position 43121 at the same time, the left rear leg frame 4211 and the right rear leg frame 4311 are in a relatively unfolded state;

[0011] The left rotating piece 4212 is provided with a first folding position 42122, and the right rotating piece 4312 is provided with a second folding position 43122. When the second locking mechanism 7 is locked with the first folding position 42122 and the second folding position 43122 at the same time, the left rear leg frame 4211 and the right rear leg frame 4311 are close to each other and folded.

[0012] The children's tricycle as described above is characterized in that the rotating handle 31 is rotatably connected to the upper part of the front support frame 2 around the fifth axis E, and a third locking mechanism is provided between the rotating handle 31 and the front support frame 2 to keep the two in a locked state.

[0013] The children's tricycle as described above is characterized in that: the first locking mechanism 6 includes a locking position 64 arranged in the support frame 1, the frame body 41 is provided with a locking piece 61 which can slide horizontally relative to it and engage with or disengage from the locking position 64, the frame body 41 is provided with a connecting piece 62 which can slide longitudinally relative to it and drive the locking piece 61 to slide horizontally relative to the support frame 1 and the frame body 41 and disengage from the locking position 64, the operating component 451 includes a sliding unlocking piece 4511 which is arranged in the seat 45 and can slide horizontally relative to it and drive the connecting piece 62 to slide longitudinally in the frame body 41, a second elastic piece 4512 is provided between the sliding unlocking piece 4511 and the seat 45 to press the sliding unlocking piece 4511 and reset the sliding unlocking piece 4511, and a third elastic piece 63 is provided between the locking piece 61 and the frame body 41 to enable the locking piece 61 to engage in the locking position 64.

[0014] The children's tricycle as described above is characterized in that: the locking member 61 includes a locking block 611, the locking block 611 is provided with a first inclined sliding surface 612, the connecting member 62 includes a connecting block 621, the connecting block 621 is provided with a second inclined sliding surface 622 that cooperates with the first inclined sliding surface 612 and can drive the locking block 611 to slide horizontally relative to the support frame 1;

[0015] The connecting block 621 is connected with a latch 65 extending to the sliding unlocking member 4511. The sliding unlocking member 4511 includes a sliding unlocking block 45111. The sliding unlocking block 45111 is provided with a third inclined sliding surface 45112 which can press the latch 65 when the sliding unlocking block 45111 slides horizontally relative to the seat 45 to drive the connecting block 621 to slide longitudinally relative to the frame 41.

[0016] The seat 45 is also provided with a two-way lock mechanism 5 capable of preventing the sliding unlocking member 4511 from moving laterally relative to the seat 45. The two-way lock mechanism 5 includes a groove 45113 provided on the sliding unlocking block 45111, and the two-way lock mechanism 5 also includes an operating block 51 that can slide longitudinally relative to the seat 45, and the operating block 51 is provided with a protrusion 511 that can be inserted into the groove 45113 and abut against the sliding unlocking block 45111 to prevent the sliding unlocking block 45111 from sliding laterally relative to the seat 45, and a first elastic member 52 is provided between the operating block 51 and the seat 45 to enable the operating block 51 and the sliding unlocking member 4511 to abut against each other.

[0017] The children's tricycle as described above is characterized in that: the left rotating piece 4212 is provided with a first unfolding position 42121, the right rotating piece 4312 is provided with a second unfolding position 43121, and when the second locking mechanism 7 is locked with the first unfolding position 42121 and the second unfolding position 43121 at the same time, the left rear leg frame 4211 and the right rear leg frame 4311 are in a relatively unfolded state;

[0018] The left rotating piece 4212 is provided with a first folding position 42122, and the right rotating piece 4312 is provided with a second folding position 43122, and when the second locking mechanism 7 is locked with the first folding position 42122 and the second folding position 43122 at the same time, the left rear leg frame 4211 and the right rear leg frame 4311 are moved closer to each other and folded;

[0019] The second locking mechanism 7 includes a positioning member 71 connected to the frame body 41. When the positioning member 71 is inserted into the first unfolded position 42121 and the second unfolded position 43121 at the same time, the left rotating piece 4212 and the right rotating piece 4312 can be relatively unfolded and locked on the frame body 41. When the positioning member 71 is inserted into the first folded position 42122 and the second folded position 43122 at the same time, the left rotating piece 4212 and the right rotating piece 4312 can be relatively folded and locked on the frame body 41. The frame body 41 is also provided with a positioning member 71 that can drive the positioning member 71 to slide downward relative to the frame body 41 when it slides longitudinally relative to the frame body 41. A push-to-release member 72 is simultaneously disengaged from the first deployed position 42121 and the second deployed position 43121 or the first folded position 42122 and the second folded position 43122. The frame 41 is also provided with a driving member 73 which can move laterally relative to the frame 41 when the connecting member 62 slides upward relative to the frame 41 and drive the push-to-release member 72 to slide downward relative to the frame 41. An elastic pressing member 74 is provided between the push-to-release member 72 and the frame 41, which can keep the positioning member 71 stuck in the first deployed position 42121 and the second deployed position 43121 or the first folded position 42122 and the second folded position 43122 at the same time.

[0020] The children's tricycle as described above is characterized in that: the driving member 73 includes a driving block 731, the driving block 731 is provided with a fourth inclined sliding surface 732, and the connecting block 621 is provided with a fifth inclined sliding surface 623 capable of cooperating with the fourth inclined sliding surface 732 to drive the driving block 731 to move horizontally when the connecting block 621 slides upward relative to the frame 41;

[0021] The push-release member 72 includes a push-release block 721 extending out of the frame 41, a sixth inclined sliding surface 722 is provided on the push-release block 721, and a seventh inclined sliding surface 733 is provided on the driving block 731, which can cooperate with the sixth inclined sliding surface 722 and drive the push-release block 721 to slide downward when the driving block 731 moves laterally relative to the frame 41.

[0022] The positioning member 71 includes a positioning block 711, the positioning block 711 is passed through the push-to-unlock block 721 and a boss 712 is provided at the lower portion of the positioning block 711, and the push-to-unlock block 721 is provided with a pressing surface 723 which can cooperate with the boss 712 and press the boss 712 when the push-to-unlock block 721 slides downward relative to the frame 41, so that the boss 712 is simultaneously disengaged from the first extended position 42121 and the second extended position 43121 or the first folded position 42122 and the second folded position 43122.

[0023] The children's tricycle as described above is characterized in that: the left rear wheel 422 can rotate from the outside of the left rear leg frame 4211 to the inside of the left rear leg frame 4211, and a first locking structure 8 that can lock the left rear leg frame 4211 and the left rear wheel 422 is provided between the left rear leg frame 4211 and the left rear wheel 422, and the first locking structure 8 includes a left upper shell 81 provided on the left rear wheel 422 and a left lower shell 82 provided on the left rear leg frame 4211, and the left upper shell 81 and the left lower shell 82 surround a left accommodating cavity 83, The left upper shell 81 and the left lower shell 82 are provided with a left spline groove 84, the left accommodating chamber 83 is provided with a left spline 85 which can slide up and down relative to the left upper shell 81 and the left lower shell 82 and can be engaged with the left spline groove 84 in the left upper shell 81 and the left lower shell 82 at the same time, the left upper shell 81 is connected with a left pressing member 86 which can make the left spline 85 detach from the left upper shell 81 after being pressed, and a left return spring 87 which can return the left spline 85 is connected between the left spline 85 and the left lower shell 82;

[0024] The right rear wheel 432 can be rotated from the outside of the right rear leg frame 4311 to the inside of the right rear leg frame 4311, and a second locking structure 9 is provided between the right rear leg frame 4311 and the right rear wheel 432 to lock the two. The second locking structure 9 includes a right upper shell 91 provided on the right rear wheel 432 and a right lower shell 92 provided on the right rear leg frame 4311. The right upper shell 91 and the right lower shell 92 surround a right accommodating cavity 93. The right upper shell 91 and the right lower shell 92 are provided to lock the right rear wheel 432. A right spline groove 94 is provided in the right lower shell 92, and a right spline 95 is provided in the right accommodating cavity 93, which can slide up and down relative to the right upper shell 91 and the right lower shell 92 and can engage with the right spline groove 94 in the right upper shell 91 and the right lower shell 92 at the same time; a right pressing piece 96 is connected to the right upper shell 91, which can disengage the right spline 95 from the right upper shell 91 after being pressed; a right return spring 97 is connected between the right spline 95 and the right lower shell 92, which can return the right spline 95 to its original position.

[0025] Compared with the prior art, the present invention has the following advantages: when folding, the control operating component unlocks the first locking mechanism, and when the first locking mechanism is unlocked, the frame can rotate relative to the support frame around the second axis B, and when the first locking mechanism is unlocked, the first locking mechanism is linked to unlock the second locking mechanism, and when the second locking mechanism is unlocked, the left rear leg and the right rear leg can rotate relative to the frame around the third axis C and the fourth axis D respectively, and when the first locking mechanism and the second locking mechanism are unlocked, the support frame is lifted, and at this time, due to its own weight, the frame rotates relative to the support frame and approaches the front wheel assembly, and at the same time the left rear leg and the right rear leg follow the frame to The front wheel assembly approaches, and when approaching, the left rear leg rotates around the third axis C, the right rear leg rotates around the fourth axis D, the right rear leg and the left rear leg move closer to each other, the left rear wheel moves from a position away from the front wheel assembly to a position close to the front wheel assembly, and the right rear wheel moves from a position away from the front wheel assembly to a position close to the front wheel assembly. At this time, the entire children's tricycle is folded, the folding method is simple, and the folded children's tricycle is reduced in length and width, occupying a small space, which is easy to carry and store, and the first locking mechanism and the second locking mechanism are linked to unlock, the structural design is more compact, and unlocking is more convenient.

Brief Description of the Drawings

[0026] Figure 1 It is one of the three-dimensional diagrams of the children's tricycle of the present invention;

[0027] Figure 2 This is the second stereoscopic diagram of the children's tricycle of the present invention;

[0028] Figure 3 is a top view of the children's tricycle of the present invention;

[0029] Figure 4 is a stereoscopic diagram of a linkage device in a children's tricycle of the present invention;

[0030] Figure 5 is an exploded view of a linkage device in a children's tricycle of the present invention;

[0031] Figure 6 is a three-dimensional diagram of the children's tricycle of the present invention when folded;

[0032] Figure 7 It is a plan view of the children's tricycle of the present invention when it is folded;

[0033] Figure 8 It is a three-dimensional diagram of the child tricycle of the present invention being transformed into a child balance car;

[0034] Fig. 9 is a cross-sectional view of a children's tricycle of the present invention;

[0035] Fig.10 yes Fig. 9 Enlarged view of the middle F area;

[0036] Fig.11 It is one of the three-dimensional diagrams of the first locking mechanism and the second locking mechanism in the children's tricycle of the present invention;

[0037] Fig.12 This is the second stereoscopic diagram of the first locking mechanism and the second locking mechanism in the children's tricycle of the present invention;

[0038] Fig.13 It is one of the three-dimensional diagrams of the first locking structure or the second locking structure in the children's tricycle of the present invention;

[0039] Fig.14 This is the second stereoscopic view of the first locking structure or the second locking structure of the children's tricycle of the present invention. [Specific implementation method]

[0040] The present invention will be further described below in conjunction with the accompanying drawings:

[0041] like Figures 1 to 14As shown, the present invention provides a children's tricycle, which has a vertical symmetry plane SP and can be moved from an unfolded position to a folded position, and is characterized in that: it includes a support frame 1, the front end of the support frame 1 is connected to a front support frame 2 that can rotate relative to it around a first axis A, the front support frame 2 is connected to a steering device 3, the steering device 3 includes a rotating handle 31 connected to the upper end of the front support frame 2, the lower end of the front support frame 2 is connected to a front wheel assembly 32, the rear end of the support frame 1 is connected to a rear support frame 4, the rear support frame 4 includes a frame body 41 that is rotatably connected to the rear end of the support frame 1 around a second axis B, the frame body 41 is provided with a seat 45, and the frame body 41 is also connected to a left support portion 42 and a right support portion 43 arranged on both sides of the vertical symmetry plane SP, the left support portion 42 rotates around a third axis Line C is rotatably connected to the frame 41, the left support part 42 includes a left rear leg 421 and a left rear wheel 422 arranged at the lower end of the left rear leg 421, the right support part 43 is rotatably connected to the frame 41 around the fourth axis D, the right support part 43 includes a right rear leg 431 and a right rear wheel 432 arranged at the lower end of the right rear leg 431; a first locking mechanism 6 is provided between the frame 41 and the support frame 1, which can lock the two to each other, and a second locking mechanism 7 is provided between the frame 41 and the left rear leg 421 and the right rear leg 431, which can lock the left rear leg 421 and the right rear leg 431 on the frame 41 and can be unlocked in conjunction with the first locking mechanism 6 when the first locking mechanism 6 is unlocked, and an operating component 451 that can control the unlocking of the first locking mechanism 6 is also provided on the rear support frame 4.

[0042] When the children's tricycle is folded, the control operating component 451 unlocks the first locking mechanism 6. When the first locking mechanism 6 is unlocked, the frame 41 can rotate relative to the support frame 1 around the second axis B, and when the first locking mechanism 6 is unlocked, the first locking mechanism 6 is linked to unlock the second locking mechanism 7. When the second locking mechanism 7 is unlocked, the left rear leg 421 and the right rear leg 431 can rotate relative to the frame 41 around the third axis C and the fourth axis D respectively. When the first locking mechanism 6 and the second locking mechanism 7 are unlocked, the support frame 1 is lifted. At this time, due to its own weight, the frame 41 rotates relative to the support frame 1 and approaches the front wheel assembly 32, and at the same time, the left rear leg 421 and the right rear leg 431 follow the frame 41 to the front wheel assembly 32 approaches, and when approaching, the left rear leg 421 rotates around the third axis C, the right rear leg 431 rotates around the fourth axis D, the right rear leg 431 and the left rear leg 421 approach each other, the left rear wheel 422 moves from a position away from the front wheel assembly 32 to a position close to the front wheel assembly 32, and the right rear wheel 432 moves from a position away from the front wheel assembly 32 to a position close to the front wheel assembly 32. At this time, the entire children's tricycle is folded, the folding method is simple, and the length and width directions of the folded children's tricycle are reduced, the occupied space is small, and it is easy to carry and store, and the first locking mechanism 6 and the second locking mechanism 7 are linked to unlock, the structural design is more compact, and the unlocking is more convenient.

[0043] like Figures 1 to 5 As shown, the left hind leg 421 includes a left hind leg frame 4211 and a left rotating piece 4212 connected to the left hind leg frame 4211 and rotatably connected to the frame body 41 around a third axis C, and the right hind leg 431 includes a right hind leg frame 4311 and a right rotating piece 4312 connected to the right hind leg frame 4311 and rotatably connected to the frame body 41 around a fourth axis D, and a linkage device 44 is provided between the left hind leg frame 4211 and the right hind leg frame 4311, which can make the left hind leg frame 4211 and the right hind leg frame 4311 rotate relative to the frame body 41 when the left rotating piece 4212 or the right rotating piece 4312 rotates relative to the frame body 41. The linkage device 44 includes a convex tooth 441 provided on the left hind leg frame 4211, and the right hind leg frame 4311 is provided with a tooth groove 442 that can cooperate with the convex tooth 441 to make the right hind leg frame 4311 mesh with the left hind leg frame 4211 for transmission.

[0044] When the left hind leg frame 4211 is rotated, the left rotating piece 4212 rotates around the third axis C relative to the frame body 41, and the convex tooth 441 on the left hind leg frame 4211 engages with the tooth groove 442 on the right hind leg frame 4311 for transmission and drives the right hind leg frame 4311 and the left hind leg frame 4211 to move synchronously. Therefore, when the left hind leg frame 4211 rotates, the right hind leg frame 4311 rotates synchronously, and the right rotating piece 4312 rotates around the fourth axis D relative to the frame body 41, so that the left hind leg frame 4211 and the right hind leg frame 4311 move synchronously and expand or approach relative to the frame body 41.

[0045] like Figures 1 to 5 as well as Figures 11 to 12 As shown, the left rotating piece 4212 is provided with a first unfolding position 42121, and the right rotating piece 4312 is provided with a second unfolding position 43121, and when the second locking mechanism 7 is locked with the first unfolding position 42121 and the second unfolding position 43121 at the same time, the left rear leg frame 4211 and the right rear leg frame 4311 are in a relatively unfolded state; the left rotating piece 4212 is provided with a first folding position 42122, and the right rotating piece 4312 is provided with a second folding position 43122, and when the second locking mechanism 7 is locked with the first folding position 42122 and the second folding position 43122 at the same time, the left rear leg frame 4211 and the right rear leg frame 4311 are close to each other and folded. The first unfolding position 42121 and the first folding position 42122 are holes set on the left rotating piece 4212, and the second unfolding position 43121 and the second folding position 43122 are holes set on the right rotating piece 4312.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7 As shown, the rotating handle 31 is connected to the upper part of the front support frame 2 by rotating around the fifth axis E, and a third locking mechanism is provided between the rotating handle 31 and the front support frame 2 to keep the two in a locked state. The third locking mechanism is an existing spline lock or a latch lock. When the third locking mechanism is unlocked, the rotating handle 31 is pushed to rotate the rotating handle 31 around the fifth axis E relative to the front support frame 2 and approach the support frame 1, so that the height direction of the children's tricycle is reduced. At this time, the folded volume of the children's tricycle is minimized, which is more convenient for storage.

[0047] like Figures 9 to 10As shown, the first locking mechanism 6 includes a latching position 64 arranged in the support frame 1, a locking member 61 is arranged in the frame body 41 and can slide horizontally relative to it to engage with or disengage from the latching position 64, a connecting member 62 is arranged in the frame body 41 and can slide longitudinally relative to it to drive the locking member 61 to slide horizontally relative to the support frame 1 and the frame body 41 and disengage from the latching position 64, the operating component 451 includes a sliding unlocking member 4511 arranged in the seat 45 and can slide horizontally relative to it to drive the connecting member 62 to slide longitudinally in the frame body 41, a second elastic member 4512 is arranged between the sliding unlocking member 4511 and the seat 45 to press the sliding unlocking member 4511 and reset the sliding unlocking member 4511, and a third elastic member 63 is arranged between the locking member 61 and the frame body 41 to enable the locking member 61 to engage in the latching position 64.

[0048] When the first locking mechanism 6 is unlocked, the sliding unlocking member 4511 is pulled first, and the sliding unlocking member 4511 slides to the left relative to the seat 45, and when the sliding unlocking member 4511 slides to the left relative to the seat 45, the sliding unlocking member 4511 pulls the connecting member 62 to slide upward, and when the sliding unlocking member 4511 pulls the connecting member 62 to slide upward, the lower end of the connecting member 62 pulls the locking member 61 to slide to the right, and when the locking member 61 slides to the right, it can compress the third elastic member 63 and disengage from the locking position 64. At this time, the frame body 41 and the support frame 1 can be rotated.

[0049] like Figures 9 to 12 As shown, the locking member 61 includes a locking block 611, on which a first inclined sliding surface 612 is provided, and the connecting member 62 includes a connecting block 621, on which a second inclined sliding surface 622 is provided, which cooperates with the first inclined sliding surface 612 and can drive the locking block 611 to slide horizontally relative to the support frame 1. The cooperation between the second inclined sliding surface 622 and the first inclined sliding surface 612 facilitates the connecting block 621 to press the locking block 611 to slide to the right.

[0050] like Figures 9 to 12 As shown, the connecting block 621 is connected with a latch 65 extending to the sliding unlocking member 4511, and the sliding unlocking member 4511 includes a sliding unlocking block 45111, and the sliding unlocking block 45111 is provided with a third inclined sliding surface 45112 that can press the latch 65 when the sliding unlocking block 45111 slides horizontally relative to the seat 45 to drive the connecting block 621 to slide longitudinally relative to the frame 41. The cooperation between the third inclined sliding surface 45112 and the latch 65 facilitates the sliding unlocking block 45111 to lift the connecting block 621 and slide upward.

[0051] like Figures 9 to 12As shown, the seat 45 is also provided with a two-way lock mechanism 5 capable of preventing the sliding unlocking member 4511 from moving laterally relative to the seat 45, the two-way lock mechanism 5 includes a groove 45113 provided on the sliding unlocking block 45111, and the two-way lock mechanism 5 also includes an operating block 51 capable of sliding longitudinally relative to the seat 45, the operating block 51 is provided with a protrusion 52 capable of being inserted into the groove 45113 and abutting against the sliding unlocking block 45111 to prevent the sliding unlocking block 45111 from sliding laterally relative to the seat 45, and a first elastic member 53 capable of causing the operating block 51 and the sliding unlocking member 4511 to abut against each other is provided between the operating block 51 and the seat 45.

[0052] In order to prevent children from accidentally touching the sliding unlocking piece 4511 and causing the first locking mechanism 6 to be unlocked when riding, a two-lock mechanism 5 is set for double locking. When the first locking mechanism 6 needs to be unlocked, it is first necessary to press the operating block 51 upwards and make the protrusion 511 on the operating block 51 disengage from the groove 45113 on the sliding unlocking block 45111. Only then can the sliding unlocking block 45111 be pulled to the left to unlock the first locking mechanism 6. The two-lock mechanism 5 can prevent children from accidentally touching the sliding unlocking piece 4511 and causing the first locking mechanism 6 to be unlocked, thereby ensuring the safety of children.

[0053] like Figures 9 to 12 As shown, the second locking mechanism 7 includes a positioning member 71 connected to the frame body 41. When the positioning member 71 is inserted into the first unfolded position 42121 and the second unfolded position 43121 at the same time, the left rotating piece 4212 and the right rotating piece 4312 can be relatively unfolded and locked on the frame body 41. When the positioning member 71 is inserted into the first retracted position 42122 and the second retracted position 43122 at the same time, the left rotating piece 4212 and the right rotating piece 4312 can be relatively retracted and locked on the frame body 41. The frame body 41 is also provided with a positioning member 71 that can drive the positioning member 71 to slide downward relative to the frame body 41 when it slides longitudinally relative to the frame body 41. A push-to-release member 72 is disengaged from the first unfolded position 42121 and the second unfolded position 43121 or the first folded position 42122 and the second folded position 43122 at the same time. The frame 41 is also provided with a driving member 73 which can move laterally relative to the frame 41 when the connecting member 62 slides upward relative to the frame 41 and drive the push-to-release member 72 to slide downward relative to the frame 41. An elastic pressing member 74 is provided between the push-to-release member 72 and the frame 41, which can keep the positioning member 71 stuck in the first unfolded position 42121 and the second unfolded position 43121 or the first folded position 42122 and the second folded position 43122 at the same time.

[0054] When the locking cam 72 is in the unlocked position, the locking cam 72 is in the unlocked position, and the locking cam 72 is in the unlocked position. When inserted in the first unfolded position 42121 and the second unfolded position 43121, the left rear leg frame 4211 and the right rear leg frame 4311 are in an unfolded state relative to the frame body 41, and can be ridden as a children's tricycle to provide sufficient stability and ensure the riding safety of young children, and when the positioning piece 71 is inserted in the first folded position 42122 and the second folded position 43122 at the same time, the left rear leg frame 4211 and the right rear leg frame 4311 are in a folded state relative to the frame body 41, and can be ridden as a children's balance car, which is convenient for cultivating children's balance ability. The present invention can switch between the tricycle state and the balance car state, so it can be suitable for children of different ages and reduce the cost of family life.

[0055] like Figures 9 to 12 As shown, the driving member 73 includes a driving block 731, and the driving block 731 is provided with a fourth inclined sliding surface 732. The connecting block 621 is provided with a fifth inclined sliding surface 623 that can cooperate with the fourth inclined sliding surface 732 to drive the driving block 731 to move horizontally when the connecting block 621 slides upward relative to the frame 41. The cooperation between the fifth inclined sliding surface 623 and the fourth inclined sliding surface 732 facilitates the connecting block 621 to press the driving block 731 to slide.

[0056] like Figures 9 to 12As shown, the push-unlocking member 72 includes a push-unlocking block 721 extending out of the frame 41, a sixth inclined sliding surface 722 is provided on the push-unlocking block 721, and a seventh inclined sliding surface 733 is provided on the driving block 731, which can cooperate with the sixth inclined sliding surface 722 and drive the push-unlocking block 721 to slide downward when the driving block 731 moves laterally relative to the frame 41. The cooperation between the seventh inclined sliding surface 733 and the sixth inclined sliding surface 722 facilitates the driving block 731 to press the push-unlocking block 721 to slide downward. And when only the state of the wheeled vehicle needs to be adjusted, the exposed push-to-unlock block 721 is pressed, and the press-to-unlock block 721 presses the positioning member 71 to disengage the positioning member 71 from the first deployed position 42121 and the second deployed position 43121 or the first folded position 42122 and the second folded position 43122, and then the left rear leg frame 4211 and the right rear leg frame 4311 are rotated to adjust the children's tricycle to the balance vehicle state or adjust the children's balance vehicle to the children's tricycle state.

[0057] like Figures 9 to 12 As shown, the positioning member 71 includes a positioning block 711, the positioning block 711 is inserted into the push-unlock block 721, and a boss 712 is provided at the lower part of the positioning block 711. The push-unlock block 721 is provided with a pressing surface 723 that can cooperate with the boss 712 and press the boss 712 when the push-unlock block 721 slides downward relative to the frame 41, so that the boss 712 is simultaneously separated from the first deployment position 42121 and the second deployment position 43121 or the first folded position 42122 and the second folded position 43122. The pressing surface 723 cooperates with the boss 712 to facilitate the positioning block 711 to press the boss 712 downward.

[0058] like Figure 3 , Figure 8 , Fig.13 and Fig.14 As shown, the left rear wheel 422 can rotate from the outside of the left rear leg frame 4211 to the inside of the left rear leg frame 4211, and a first locking structure 8 that can lock the left rear leg frame 4211 and the left rear wheel 422 is provided between the left rear leg frame 4211 and the left rear wheel 422. The first locking structure 8 includes a left upper shell 81 provided on the left rear wheel 422 and a left lower shell 82 provided on the left rear leg frame 4211. The left upper shell 81 and the left lower shell 82 surround a left accommodating cavity 83. The left upper shell 81 A left spline groove 84 is provided in the left lower shell 82, and a left spline 85 is provided in the left accommodating chamber 83, which can slide up and down relative to the left upper shell 81 and the left lower shell 82 and can engage with the left spline groove 84 in the left upper shell 81 and the left lower shell 82 at the same time; a left pressing piece 86 is connected to the left upper shell 81, which can disengage the left spline 85 from the left upper shell 81 after being pressed, and a left return spring 87 is connected between the left spline 85 and the left lower shell 82, which can return the left spline 85 to its original position.

[0059] When the children's tricycle is to be converted into a children's balance car, the left rear wheel 422 needs to be rotated from the outside of the left rear leg frame 4211 to the inside of the left rear leg frame 4211 so that it can abut against the right rear wheel 432, and the left pressing piece 86 is pressed downward. The left pressing piece 86 presses the left spline 85 and makes the left spline 85 disengage from the left spline groove 84 in the left upper shell 81 and enter the left lower shell 82. At this time, the left rear wheel 422 can be rotated from the outside of the left rear leg frame 4211 to the inside of the left rear leg frame 4211, and the left pressing piece 86 is released. The left return spring 87 presses the left spline 85 upward so that the left spline 85 is engaged with the left spline grooves 84 in the left upper shell 81 and the left lower shell 82 at the same time, so that the left rear leg frame 4211 and the left rear wheel 422 are kept locked again.

[0060] like Figure 3 , Figure 8 , Fig.13 and Fig.14 As shown, the right rear wheel 432 can be rotated from the outside of the right rear leg frame 4311 to the inside of the right rear leg frame 4311, and a second locking structure 9 is provided between the right rear leg frame 4311 and the right rear wheel 432 to lock the two. The second locking structure 9 includes a right upper shell 91 provided on the right rear wheel 432 and a right lower shell 92 provided on the right rear leg frame 4311. The right upper shell 91 and the right lower shell 92 surround a right accommodating cavity 93. The right upper shell 91 A right spline groove 94 is provided in the right lower shell 92, and a right spline 95 is provided in the right accommodating cavity 93, which can slide up and down relative to the right upper shell 91 and the right lower shell 92 and can engage with the right spline groove 94 in the right upper shell 91 and the right lower shell 92 at the same time; a right pressing piece 96 is connected to the right upper shell 91, which can disengage the right spline 95 from the right upper shell 91 after being pressed, and a right return spring 97 is connected between the right spline 95 and the right lower shell 92, which can return the right spline 95 to its original position.

[0061] When the children's tricycle is to be converted into a children's balance car, the right rear wheel 432 needs to be rotated from the outside of the right rear leg frame 4311 to the inside of the right rear leg frame 4311 so that it can abut against the left rear wheel 422, and the right pressing piece 96 is pressed downward. The right pressing piece 96 presses the right spline 95 and makes the right spline 95 disengage from the right spline groove 94 in the right upper shell 91 and enter the right lower shell 92. At this time, the right rear wheel 432 can be rotated from the outside of the right rear leg frame 4311 to the inside of the right rear leg frame 4311, and the right pressing piece 96 is released. The right return spring 97 presses the right spline 95 upward so that the right spline 95 is engaged with the right spline grooves 94 in the right upper shell 91 and the right lower shell 92 at the same time, so that the right rear leg frame 4311 and the right rear wheel 432 are locked again.

Claims

1. A children's tricycle having a vertical plane of symmetry (SP) and being movable from an unfolded position to a folded position, Features: The invention comprises a support frame (1), wherein the front end of the support frame (1) is connected to a front support frame (2) which can rotate relative to the support frame (1) around a first axis (A), the front support frame (2) is connected to a steering device (3), the steering device (3) comprises a rotating handle (31) connected to the upper end of the front support frame (2), the lower end of the front support frame (2) is connected to a front wheel assembly (32), the rear end of the support frame (1) is connected to a rear support frame (4), the rear support frame (4) comprises a frame body (41) which is connected to the rear end of the support frame (1) and can rotate around a second axis (B), and a seat (45) is provided on the frame body (41). The frame (41) is also connected to a left support portion (42) and a right support portion (43) arranged on both sides of the vertical symmetry plane (SP); the left support portion (42) is rotatably connected to the frame (41) around a third axis (C); the left support portion (42) includes a left rear leg (421) and a left rear wheel (422) arranged at the lower end of the left rear leg (421); the right support portion (43) is rotatably connected to the frame (41) around a fourth axis (D); the right support portion (43) includes a right rear leg (431) and a right rear wheel (432) arranged at the lower end of the right rear leg (431); A first locking mechanism (6) is provided between the frame (41) and the support frame (1) so that the two can be locked to each other; a second locking mechanism (7) is provided between the frame (41) and the left rear leg (421) and the right rear leg (431) so that the left rear leg (421) and the right rear leg (431) can be locked to the frame (41) and can be unlocked in conjunction with the first locking mechanism (6) when the first locking mechanism (6) is unlocked; and an operating component (451) is also provided on the rear support frame (4) so ​​that the first locking mechanism (6) can be unlocked; The left hind leg (421) comprises a left hind leg frame (4211) and a left rotating plate (4212) connected to the left hind leg frame (4211) and rotatably connected to the frame body (41) around a third axis (C); the right hind leg (431) comprises a right hind leg frame (4311) and a right rotating plate (4312) connected to the right hind leg frame (4311) and rotatably connected to the frame body (41) around a fourth axis (D); a linkage device (44) is provided between the left hind leg frame (4211) and the right hind leg frame (4311) and is capable of causing the left hind leg frame (4211) and the right hind leg frame (4311) to rotate relative to the frame body (41) when the left rotating plate (4212) or the right rotating plate (4312) rotates relative to the frame body (41); The linkage device (44) comprises a convex tooth (441) provided on the left rear leg frame (4211), and the right rear leg frame (4311) is provided with a tooth groove (442) capable of cooperating with the convex tooth (441) to enable the right rear leg frame (4311) to mesh with the left rear leg frame (4211) for transmission; The left rotating piece (4212) is provided with a first unfolding position (42121), and the right rotating piece (4312) is provided with a second unfolding position (43121), and when the second locking mechanism (7) is locked with the first unfolding position (42121) and the second unfolding position (43121) at the same time, the left rear leg frame (4211) and the right rear leg frame (4311) are in a relatively unfolded state; The left rotating piece (4212) is provided with a first folding position (42122), and the right rotating piece (4312) is provided with a second folding position (43122), and when the second locking mechanism (7) is locked with the first folding position (42122) and the second folding position (43122) at the same time, the left rear leg frame (4211) and the right rear leg frame (4311) are moved closer to each other and folded; The first locking mechanism (6) comprises a latching position (64) provided in the support frame (1); the frame body (41) is provided with a locking member (61) capable of sliding horizontally relative to the latching position (64) to engage with or disengage from the latching position (64); the frame body (41) is provided with a connecting member (62) capable of sliding longitudinally relative to the latching position to drive the locking member (61) to slide horizontally relative to the support frame (1) and the frame body (41) to disengage from the latching position (64); the operating member (451) comprises a locking member (61) provided on the seat ( A sliding unlocking member (4511) is provided in the frame (45) and is capable of sliding horizontally relative thereto to drive the connecting member (62) to slide longitudinally in the frame (41); a second elastic member (4512) is provided between the sliding unlocking member (4511) and the seat (45) for pressing the sliding unlocking member (4511) to reset the sliding unlocking member (4511); and a third elastic member (63) is provided between the locking member (61) and the frame (41) to enable the locking member (61) to be engaged in the engaging position (64).

2. The children's tricycle according to claim 1, Features: The rotating handle (31) is rotatably connected to the upper part of the front support frame (2) around a fifth axis (E), and a third locking mechanism is provided between the rotating handle (31) and the front support frame (2) to keep the two in a locked state.

3. The children's tricycle according to claim 1, Features: The locking member (61) comprises a locking block (611), the locking block (611) being provided with a first inclined sliding surface (612); the connecting member (62) comprises a connecting block (621), the connecting block (621) being provided with a second inclined sliding surface (622) which cooperates with the first inclined sliding surface (612) and can drive the locking block (611) to slide laterally relative to the support frame (1); The connecting block (621) is connected to a latch (65) extending to the sliding unlocking member (4511); the sliding unlocking member (4511) comprises a sliding unlocking block (45111); the sliding unlocking block (45111) is provided with a third inclined sliding surface (45112) which can press the latch (65) when the sliding unlocking block (45111) slides horizontally relative to the seat (45) to drive the connecting block (621) to slide longitudinally relative to the frame (41); The seat (45) is also provided with a two-way lock mechanism (5) capable of preventing the sliding unlocking member (4511) from moving laterally relative to the seat (45), the two-way lock mechanism (5) comprising a groove (45113) provided on the sliding unlocking block (45111), and the two-way lock mechanism (5) further comprising an operating block (51) capable of sliding longitudinally relative to the seat (45), the operating block (51) being provided with a protrusion (511) capable of being inserted into the groove (45113) and abutting against the sliding unlocking block (45111) to prevent the sliding unlocking block (45111) from sliding laterally relative to the seat (45), and a first elastic member (52) capable of causing the operating block (51) and the sliding unlocking member (4511) to abut against each other is provided between the operating block (51) and the seat (45).

4. The children's tricycle according to claim 3, Features: The left rotating piece (4212) is provided with a first unfolding position (42121), and the right rotating piece (4312) is provided with a second unfolding position (43121), and when the second locking mechanism (7) is locked with the first unfolding position (42121) and the second unfolding position (43121) at the same time, the left rear leg frame (4211) and the right rear leg frame (4311) are in a relatively unfolded state; The left rotating piece (4212) is provided with a first folding position (42122), and the right rotating piece (4312) is provided with a second folding position (43122), and when the second locking mechanism (7) is locked with the first folding position (42122) and the second folding position (43122) at the same time, the left rear leg frame (4211) and the right rear leg frame (4311) are moved closer to each other and folded; The second locking mechanism (7) comprises a positioning member (71) connected to the frame (41); when the positioning member (71) is inserted into the first unfolded position (42121) and the second unfolded position (43121) at the same time, the left rotating piece (4212) and the right rotating piece (4312) can be relatively unfolded and locked on the frame (41); when the positioning member (71) is inserted into the first folded position (42122) and the second folded position (43122) at the same time, the left rotating piece (4212) and the right rotating piece (4312) can be relatively folded and locked on the frame (41); the frame (41) is also provided with a positioning member (71) which can drive the positioning member (71) to slide downward relative to the frame (41) and move from the first folded position (42122) to the second folded position (43122) when the positioning member (71) slides longitudinally relative to the frame (41). A push-release member (72) is simultaneously disengaged from an unfolded position (42121) and a second unfolded position (43121) or a first folded position (42122) and a second folded position (43122); a driving member (73) is further provided in the frame (41) and is capable of moving laterally relative to the frame (41) when the connecting member (62) slides upward relative to the frame (41) to drive the push-release member (72) to slide downward relative to the frame (41); and an elastic pressing member (74) is provided between the push-release member (72) and the frame (41) and is capable of keeping the positioning member (71) simultaneously stuck in the first unfolded position (42121) and the second unfolded position (43121) or the first folded position (42122) and the second folded position (43122).

5. The children's tricycle according to claim 4, Features: The driving member (73) comprises a driving block (731), the driving block (731) is provided with a fourth inclined sliding surface (732), and the connecting block (621) is provided with a fifth inclined sliding surface (623) capable of cooperating with the fourth inclined sliding surface (732) to drive the driving block (731) to move laterally when the connecting block (621) slides upward relative to the frame (41); The push-to-release member (72) comprises a push-to-release block (721) extending out of the frame (41); the push-to-release block (721) is provided with a sixth inclined sliding surface (722); the driving block (731) is provided with a seventh inclined sliding surface (733) which can cooperate with the sixth inclined sliding surface (722) and drive the push-to-release block (721) to slide downward when the driving block (731) moves laterally relative to the frame (41); The positioning member (71) comprises a positioning block (711), the positioning block (711) is inserted into the push-unlocking block (721), and a boss (712) is provided at the lower part of the positioning block (711), and the push-unlocking block (721) is provided with a pressing surface (723) which can cooperate with the boss (712) and press the boss (712) when the push-unlocking block (721) slides downward relative to the frame (41), so that the boss (712) is simultaneously disengaged from the first extended position (42121) and the second extended position (43121) or the first folded position (42122) and the second folded position (43122).

6. The children's tricycle according to claim 1, Features: The left rear wheel (422) can rotate from the outside of the left rear leg frame (4211) to the inside of the left rear leg frame (4211), and a first locking structure (8) capable of locking the left rear leg frame (4211) and the left rear wheel (422) is provided between the left rear leg frame (4211) and the left rear wheel (422), the first locking structure (8) comprising a left upper shell (81) provided on the left rear wheel (422) and a left lower shell (82) provided on the left rear leg frame (4211), the left upper shell (81) and the left lower shell (82) enclosing a left accommodating cavity (83), the left upper shell (81) and the left lower shell (82) enclosing a left accommodating cavity (83), A left spline groove (84) is provided in the shell (82); a left spline (85) is provided in the left accommodating chamber (83) and is capable of sliding up and down relative to the left upper shell (81) and the left lower shell (82) and being simultaneously engaged with the left spline groove (84) in the left upper shell (81) and the left lower shell (82); a left pressing member (86) is connected to the left upper shell (81) and is capable of disengaging the left spline (85) from the left upper shell (81) after being pressed; and a left return spring (87) is connected between the left spline (85) and the left lower shell (82) and is capable of returning the left spline (85); The right rear wheel (432) can be rotated from the outside of the right rear leg frame (4311) to the inside of the right rear leg frame (4311), and a second locking structure (9) capable of locking the right rear leg frame (4311) and the right rear wheel (432) is provided between the right rear leg frame (4311) and the right rear wheel (432), the second locking structure (9) comprising a right upper shell (91) provided on the right rear wheel (432) and a right lower shell (92) provided on the right rear leg frame (4311), the right upper shell (91) and the right lower shell (92) enclosing a right accommodating cavity (93), the right upper shell (91) and the right lower shell (92) enclosing a right accommodating cavity (93), A right spline groove (94) is provided in the shell (92); a right spline (95) is provided in the right accommodating chamber (93) and can slide up and down relative to the right upper shell (91) and the right lower shell (92) and can be engaged with the right spline groove (94) in the right upper shell (91) and the right lower shell (92) at the same time; a right pressing member (96) is connected to the right upper shell (91) and can cause the right spline (95) to be detached from the right upper shell (91) after being pressed; and a right return spring (97) is connected between the right spline (95) and the right lower shell (92) and can cause the right spline (95) to return to its original position.

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