Bidirectional force return device of toy car

Abstract

The utility model relates to a toy car two-way force return device which comprises an outer shell formed by a first mounting plate and a second mounting plate which are oppositely spliced and fixed, a mounting cavity for mounting an inner shell is formed between the two mounting plates, and a limiting structure is arranged on the inner wall of the mounting cavity to guarantee stable movement of the inner shell. The inner shell is arranged in the outer shell in a front-back moving mode, a spring driving gear is rotationally arranged in the inner shell, a walking driving gear capable of moving front and back is further arranged, and the spring driving gear and the walking driving gear are in transmission connection through a bidirectional driving gear set. The spring driving gear is in driving connection with the outer shell through the power switching assembly, the first mounting plate and the second mounting plate are oppositely provided with insertion holes in which a driving shaft of the walking driving gear is inserted, the first mounting plate is provided with a driving groove and a first long groove, the second mounting plate is provided with a second long groove, and the clamping columns of the inner shell are movably matched with the first long groove and the second long groove respectively. The bidirectional force returning device of the toy car is stable in structure, unsmooth power transmission or faults caused by structure looseness or shaking are avoided, and forward and backward bidirectional running of the toy car can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of toy technology, specifically to a two-way pullback device for toy cars. Background Technology

[0002] Existing toy cars use pullback mechanisms that can only store power in one direction, mostly storing power backward and then pulling back forward, lacking the ability to travel in both directions, thus limiting children's enjoyment. Existing technology includes a Chinese patent (CN206823180U) that discloses a bidirectional pullback mechanism. This mechanism uses two movable gears and a movable rotating shaft to create a bidirectional drive, driving a pullback spring disc to store power and release it in that direction. It has the advantages of simple structure and convenient control. However, in this bidirectional pullback mechanism, the switching frame is fixedly connected to the housing and the drive shaft. This connection structure is not stable enough and is prone to loosening or shaking, leading to poor power transmission or malfunctions. In some cases, the switching frame may even detach from the drive shaft, rendering the mechanism unusable. Therefore, there is an urgent need for a more structurally stable bidirectional pullback mechanism for toy cars. Utility Model Content

[0003] The purpose of this invention is to provide a two-way pullback device for toy cars, which solves the aforementioned problems existing in current toy pullback cars.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A toy car bidirectional pullback device includes a housing, an inner shell movably disposed within the housing, a spring-driven gear rotatably disposed within the inner shell, a walking drive gear movably disposed within the inner shell, and a bidirectional drive gear assembly drivingly connecting the spring-driven gear and the walking drive gear. The spring-driven gear is drivenly connected to the housing via a power switching assembly. The housing is composed of a first mounting plate and a second mounting plate that are relatively assembled and fixed. A mounting cavity for mounting the inner shell is provided between the first mounting plate and the second mounting plate. The first mounting plate and the second mounting plate are provided with insertion holes for inserting the drive shaft of the walking drive gear. The first mounting plate has a drive groove and a first long groove, and the second mounting plate has a second long groove. The power switching assembly is movably connected to the drive groove and is driven to move back and forth by it. Both the first long groove and the second long groove extend along the moving direction of the inner shell, and the locking post of the inner shell can be movably engaged in both the first long groove and the second long groove.

[0006] Furthermore, the inner shell has a recessed groove on the outer wall side facing the first mounting plate. The groove is parallel to the first long groove. The inner wall of the first mounting plate has a first limiting block at a position corresponding to the groove. The first limiting block is slidably connected in the groove and is abuttingly connected to the end wall of the groove.

[0007] Furthermore, the number of the slide grooves is two and they are arranged opposite to each other. The number of the first limiting blocks can be set to one or two. The inner wall of the first mounting plate is provided with sliders at positions corresponding to the two slide grooves, and the two sliders are slidably connected to the corresponding slide grooves.

[0008] Furthermore, the inner shell has a protrusion on the outer wall side facing the second mounting plate, and the inner wall of the second mounting plate has a recess corresponding to the protrusion, with the protrusion slidably connected in the recess.

[0009] Furthermore, the shape of one side of the inner wall of the mounting cavity matches the shape of one side of the outer wall of the inner shell, and a second limiting block is provided on the other side of the inner wall of the mounting cavity protruding towards the inner shell. The second limiting block is abuttingly connected to the other side of the outer wall of the inner shell.

[0010] Furthermore, the inner shell includes a third mounting plate, a fourth mounting plate, and a fifth mounting plate. The third mounting plate and the fourth mounting plate are connected, and the fifth mounting plate is sandwiched between the third mounting plate and the fourth mounting plate. The bidirectional drive gear set includes a first actuating gear, a second actuating gear, a transmission gear, and a reversing gear. The first actuating gear and the second actuating gear are disposed on both sides of the fifth mounting plate. The transmission gear and the reversing gear are disposed between the third mounting plate and the fourth mounting plate. The first actuating gear and the second actuating gear are both connected to the spring drive gear. The transmission gear is connected to the first actuating gear and the second actuating gear. The reversing gear is connected to the transmission gear.

[0011] Furthermore, a third elongated groove is provided on the inner shell at a position corresponding to the walking drive gear along the moving direction of the inner shell. The drive shaft is movably disposed in the third elongated groove and passes through the walking drive gear and the insertion hole. The insertion hole is sleeved on the drive shaft. When the inner shell moves back and forth relative to the outer shell, the drive shaft moves back and forth relative to the third elongated groove to mesh with the transmission gear or the reversing gear.

[0012] Furthermore, the third mounting plate and the fifth mounting plate are provided with a fourth long slot, the first actuating gear is movably disposed in the fourth long slot, the fourth mounting plate and the fifth mounting plate are provided with a fifth long slot, and the second actuating gear is movably disposed in the fifth long slot.

[0013] Furthermore, the power switching assembly includes a one-way wheel and a wheel sleeve. The one-way wheel is disposed on the outer side of the first mounting plate and is coaxially connected to the spring drive gear. The wheel sleeve is unidirectionally driven by the one-way wheel. An eccentric protrusion is provided on the inner side of the wheel sleeve. The movement of the eccentric protrusion in the drive groove drives the outer shell and the inner shell to move back and forth relative to each other.

[0014] Furthermore, the one-way wheel is provided with a pawl, and the inner side of the wheel sleeve is provided with a circular ratchet ring that cooperates with the pawl, and the one-way wheel sleeve is disposed in the circular ratchet ring.

[0015] The beneficial effects of this utility model are:

[0016] This utility model relates to a redesigned two-way pullback mechanism for toy cars. The inner shell is movably installed within the outer shell structure, which consists of a first mounting plate and a second mounting plate. The drive gear is stably installed inside the outer shell through the insertion holes. Furthermore, by incorporating guide structures such as snap-fit ​​posts, a first long groove, and a second long groove between the outer and inner shells, the structural stability between them is improved. This ensures the smoothness of the inner shell and the drive gear during movement, preventing power transmission problems or malfunctions caused by structural loosening or shaking. Ultimately, this enhances the overall operational reliability and service life of the pullback mechanism. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the toy car bidirectional pullback device of this utility model;

[0018] Figure 2 yes Figure 1 A structural diagram from another angle;

[0019] Figure 3 This is a schematic diagram of the structure of the first mounting plate in the two-way pullback device for toy cars of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the second mounting plate in the toy car bidirectional pullback device of this utility model;

[0021] Figure 5 This is a schematic diagram of the inner shell structure of the toy car bidirectional pullback device of this utility model;

[0022] Figure 6 yes Figure 5 A structural diagram from another angle;

[0023] Figure 7 This is a schematic diagram of the bidirectional drive gear set in the bidirectional pullback device for toy cars of this utility model;

[0024] Figure 8 yes Figure 7 A structural diagram from another angle;

[0025] Figure 9 This is a schematic diagram of the structure of the spring-driven gear and power switching component in the toy car bidirectional pullback device of this utility model;

[0026] Figure 10 This is a schematic diagram of the structure of the third mounting plate in the toy car bidirectional pullback device of this utility model;

[0027] Figure 11 This is a schematic diagram of the fourth mounting plate in the toy car bidirectional pullback device of this utility model.

[0028] The names corresponding to each mark in the diagram:

[0029] 1. Outer shell; 11. First mounting plate; 111. Drive slot; 112. First elongated slot; 113. First limiting block; 114. Slider; 12. Second mounting plate; 121. Second elongated slot; 122. Groove; 13. Mounting cavity; 131. Second limiting block; 14. Insertion hole.

[0030] 2. Inner shell; 21. Snap-fit ​​post; 22. Slide groove; 23. Boss; 24. Third long slot; 25. Third mounting plate; 26. Fourth mounting plate; 27. Fifth mounting plate; 28. Fourth long slot; 29. ​​Fifth long slot.

[0031] 3. Spring-driven gear,

[0032] 4. Walking drive gear,

[0033] 5. Bidirectional drive gear set; 51. First actuating gear; 52. Second actuating gear; 53. Transmission gear; 54. Reversing gear.

[0034] 6. Power switching assembly, 61. One-way wheel, 611. Pawl, 62. Wheel sleeve, 621. Eccentric protrusion, 622. Circular ratchet ring. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0036] like Figure 1As shown in Figure 11, this toy car bidirectional pullback device consists of an outer shell 1, an inner shell 2, a spring drive gear 3, a walking drive gear 4, a bidirectional drive gear set 5, and a power switching component 6.

[0037] Figure 1 and Figure 2 As shown, the outer shell 1 is composed of a first mounting plate 11 and a second mounting plate 12 that are fixed together. The two are fixed together by a plug-in structure such as plug-in posts and plug-in holes (the two can also be fixed together by other structures, such as snap-fit ​​structures, screws, and other fasteners). A mounting cavity 13 for mounting the inner shell 2 is formed between the first mounting plate 11 and the second mounting plate 12. The first mounting plate 11 and the second mounting plate 12 are provided with plug-in holes 14, which are used to plug in the drive shaft of the travel drive gear 4. The first mounting plate 11 has a drive groove 111 and a first long groove 112, and the second mounting plate 12 has a second long groove 121. A power switching component 6 is movably connected in the drive groove 111. The power switching component 6 can drive the outer shell 1 and the inner shell 2 to move back and forth relative to each other by driving the drive groove 111 to move. The first long groove 112 and the second long groove 121 both extend along the moving direction of the inner shell 2, and the first long groove 112 and the second long groove 121 can both be movably fitted with the locking post 21 of the inner shell 2. Through the cooperation of the locking post 21 with the first long groove 112 and the second long groove 121, the stable back and forth movement of the inner shell 2 in the outer shell 1 is realized.

[0038] The inner shell 2 is movable back and forth within the mounting cavity 13 of the outer shell 1, and its specific structure is as follows:

[0039] Figures 3-6 As shown, the inner shell 2 has a recessed groove 22 on the outer wall side facing the first mounting plate 11, and the groove 22 is parallel to the first elongated groove 112. The inner wall of the first mounting plate 11 has a first limiting block 113 at a position corresponding to the groove 22. There is one first limiting block 113, which is slidably connected within the groove 22 and abuts against the end wall of the groove 22, thus limiting movement. In this embodiment, there are two grooves 22 arranged opposite to each other. The inner wall of the first mounting plate 11 has sliders 114 at positions corresponding to the two grooves 22, and the two sliders 114 are slidably connected within their respective grooves 22. The cooperation between the sliders 114 and the grooves 22 further enhances the stability of the inner shell 2 during forward and backward movement. In other embodiments, the number of first limiting blocks 113 can correspond one-to-one with the two grooves 22, and the number of grooves 22 can be one.

[0040] Figure 4 and Figure 6As shown, the inner shell 2 has a protrusion 23 on the outer wall side facing the second mounting plate 12, and the inner wall of the second mounting plate 12 has a recess 122 at the position corresponding to the protrusion 23. The protrusion 23 is slidably connected in the recess 122. Through the cooperation between the protrusion 23 and the recess 122, a good guiding effect is achieved when the inner shell 2 moves, and the stability of the inner shell 2 during the back-and-forth movement can be further enhanced.

[0041] In addition, the shape of one side of the inner wall of the mounting cavity 13 matches the shape of one side of the outer wall of the inner shell 2. The other side of the inner wall of the mounting cavity 13 is provided with a second limiting block 131 protruding towards the inner shell 2. The second limiting block 131 is connected to the other side of the outer wall of the inner shell 2 in contact with each other. The movement of the inner shell 2 is limited by the second limiting block 131 to prevent the inner shell 2 from moving excessively.

[0042] The spring-driven gear 3 is rotatably installed in the inner shell 2 and is the power input component of the entire pullback device. The spring-driven gear 3 is driven and connected to the outer shell 1 through the power switching component 6.

[0043] The drive gear 4 is movably disposed within the inner housing 2. A third elongated groove 24 is provided on the inner housing 2 at a position corresponding to the drive gear 4 along the direction of movement of the inner housing 2. The drive shaft is movably disposed within the third elongated groove 24, passing through the drive gear 4 and the insertion hole 14, which is fitted onto the drive shaft. When the inner housing 2 moves back and forth relative to the outer housing 1, the drive shaft moves back and forth relative to the third elongated groove 24, thereby achieving meshing connection with the transmission gear 53 or the reversing gear 54.

[0044] Figures 5-11 As shown, the bidirectional drive gear set 5 is connected to the spring drive gear 3 and the travel drive gear 4, and its specific structure is as follows:

[0045] The inner shell 2 includes a third mounting plate 25, a fourth mounting plate 26 and a fifth mounting plate 27. The third mounting plate 25 and the fourth mounting plate 26 are connected, and the fifth mounting plate 27 is sandwiched between the third mounting plate 25 and the fourth mounting plate 26.

[0046] The bidirectional drive gear set 5 includes a first actuating gear 51, a second actuating gear 52, a transmission gear 53, and a reversing gear 54. The first actuating gear 51 and the second actuating gear 52 are disposed on both sides of the fifth mounting plate 27, and the transmission gear 53 and the reversing gear 54 are disposed between the third mounting plate 25 and the fourth mounting plate 26. The first actuating gear 51 and the second actuating gear 52 are both connected to the spring-driven gear 3, the transmission gear 53 is connected to the first actuating gear 51 and the second actuating gear 52, and the reversing gear 54 is connected to the transmission gear 53.

[0047] Figure 10 and Figure 11As shown, the third mounting plate 25 and the fifth mounting plate 27 are provided with a fourth long groove 28, and the first actuating gear 51 is movably disposed in the fourth long groove 28; the fourth mounting plate 26 and the fifth mounting plate 27 are provided with a fifth long groove 29, and the second actuating gear 52 is movably disposed in the fifth long groove 29.

[0048] Figure 7 and Figure 9 As shown, the power switching assembly 6 is used to drive the outer shell 1 and the inner shell 2 to move back and forth relative to each other, thereby changing the meshing state of the travel drive gear 4 and the bidirectional drive gear set 5 to achieve bidirectional drive. The power switching assembly 6 includes a one-way wheel 61 and a wheel sleeve 62. The one-way wheel 61 is located on the outer side of the first mounting plate 11 and is coaxially connected to the spring drive gear 3. The wheel sleeve 62 is connected to the one-way wheel 61 in a one-way drive. An eccentric protrusion 621 is provided on the inner side of the wheel sleeve 62. The movement of the eccentric protrusion 621 in the drive groove 111 drives the outer shell 1 and the inner shell 2 to move back and forth relative to each other. A pawl 611 is provided on the one-way wheel 61. A circular ratchet ring 622 that cooperates with the pawl 611 is provided on the inner side of the wheel sleeve 62. The one-way wheel 61 is fitted in the circular ratchet ring 622. Through the cooperation of the pawl 611 and the circular ratchet ring 622, the one-way transmission between the one-way wheel 61 and the wheel sleeve 62 is realized.

[0049] This toy car's two-way pullback mechanism improves structural stability by rationally designing the structure of the outer shell 1 and inner shell 2, and optimizing the connection method of the two-way drive gear set 5 and power switching component 6. This avoids situations where power transmission is not smooth or malfunctions are caused by structural loosening or shaking, ensuring the normal operation of the toy car.

[0050] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model are within the protection scope of this utility model.

Claims

1. A two-way pullback mechanism for a toy car, comprising a housing, an inner housing movably disposed within the housing, a spring-driven gear rotatably disposed within the inner housing, a travel-driven gear movably disposed within the inner housing, and a two-way drive gear set drivingly connecting the spring-driven gear and the travel-driven gear, wherein the spring-driven gear is drivenly connected to the housing via a power switching assembly, characterized in that: The outer shell is composed of a first mounting plate and a second mounting plate that are fixed together. There is a mounting cavity between the first mounting plate and the second mounting plate for mounting the inner shell. The first mounting plate and the second mounting plate are provided with insertion holes for inserting the drive shaft of the walking drive gear. The first mounting plate is provided with a drive groove and a first long groove, and the second mounting plate is provided with a second long groove. The power switching component is movably connected in the drive groove and is driven to move back and forth by it. The first long groove and the second long groove both extend along the moving direction of the inner shell, and the snap-fit ​​post of the inner shell can be movably engaged in both the first long groove and the second long groove.

2. The toy car bidirectional pullback device according to claim 1, characterized in that: The inner shell has a recessed groove on the outer wall side facing the first mounting plate. The groove is parallel to the first long groove. The inner wall of the first mounting plate has a first limiting block at a position corresponding to the groove. The first limiting block is slidably connected in the groove and is abuttingly connected to the end wall of the groove.

3. The toy car bidirectional pullback device according to claim 2, characterized in that: The number of the slide grooves is two and they are arranged opposite to each other. The number of the first limiting blocks can be one or two. The inner wall of the first mounting plate is provided with sliders at positions corresponding to the two slide grooves. The two sliders are slidably connected to the corresponding slide grooves.

4. The toy car bidirectional pullback device according to claim 2, characterized in that: The inner shell has a protrusion on the outer wall side facing the second mounting plate, and the inner wall of the second mounting plate has a recess corresponding to the protrusion, with the protrusion slidably connected in the recess.

5. The toy car bidirectional pullback device according to claim 1, characterized in that: The shape of one side of the inner wall of the mounting cavity matches the shape of one side of the outer wall of the inner shell. A second limiting block is provided on the other side of the inner wall of the mounting cavity protruding towards the inner shell. The second limiting block is abuttingly connected to the other side of the outer wall of the inner shell.

6. The toy car bidirectional pullback device according to any one of claims 1-5, characterized in that: The inner shell includes a third mounting plate, a fourth mounting plate, and a fifth mounting plate. The third mounting plate and the fourth mounting plate are connected, and the fifth mounting plate is sandwiched between the third mounting plate and the fourth mounting plate. The bidirectional drive gear set includes a first actuating gear, a second actuating gear, a transmission gear, and a reversing gear. The first actuating gear and the second actuating gear are disposed on both sides of the fifth mounting plate. The transmission gear and the reversing gear are disposed between the third mounting plate and the fourth mounting plate. The first actuating gear and the second actuating gear are both connected to the spring drive gear. The transmission gear is connected to the first actuating gear and the second actuating gear. The reversing gear is connected to the transmission gear.

7. The toy car bidirectional pullback device according to claim 6, characterized in that: A third long groove is provided on the inner shell at a position corresponding to the walking drive gear along the moving direction of the inner shell. The drive shaft is movably disposed in the third long groove and passes through the walking drive gear and the insertion hole. The insertion hole is sleeved on the drive shaft. When the inner shell moves back and forth relative to the outer shell, the drive shaft moves back and forth relative to the third long groove to mesh with the transmission gear or the reversing gear.

8. The toy car bidirectional pullback device according to claim 6, characterized in that: The third mounting plate and the fifth mounting plate are provided with a fourth long slot, the first actuating gear is movably disposed in the fourth long slot, the fourth mounting plate and the fifth mounting plate are provided with a fifth long slot, and the second actuating gear is movably disposed in the fifth long slot.

9. The toy car bidirectional pullback device according to any one of claims 1-5, characterized in that: The power switching assembly includes a one-way wheel and a wheel sleeve. The one-way wheel is located on the outside of the first mounting plate and is coaxially connected to the spring drive gear. The wheel sleeve is unidirectionally driven by the one-way wheel. An eccentric protrusion is provided on the inner side of the wheel sleeve. The movement of the eccentric protrusion in the drive groove drives the outer shell and the inner shell to move back and forth relative to each other.

10. The toy car bidirectional pullback device according to claim 9, characterized in that: The one-way wheel is provided with a pawl, and the inner side of the wheel sleeve is provided with a circular ratchet ring that cooperates with the pawl. The one-way wheel sleeve is located in the circular ratchet ring.

Images