Backward shifting and accelerating synchronous control system for a remote-controlled toy car

Abstract

A backward shifting and accelerating synchronous control system installed in a remote-controlled gasoline engine toy car and controlled by a remote controller to move the toy car backwards and to accelerate the speed. The system includes an accelerator control unit held in position by a torsional spring and turned to control the oil flow rate of the backward steering accelerating oil valve of the engine of the toy car, a swivel arm, the swivel arm having a first end coupled to the forward/backward steering control mechanism of the gasoline engine toy car by a first link and a second end coupled to the accelerator control unit by a second link, and a server controlled by a remote controller to turn the swivel arm, to further shift the forward/backward steering control mechanism to the backward steering mode and drive the accelerator control unit to open the backward steering accelerating oil valve of the engine of the toy car.

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a remote-controlled toy car and, more specifically, to a backward shifting and accelerating synchronous control system for a remote-controlled toy car.

[0002] Regular remote-controlled gasoline engine toy cars can be controlled to move forwards and backwards, to change the steering direction, and to accelerate the speed when changed the direction of the front wheels or shifted the gear to the backward mode. According to conventional designs, three separate servers are used to achieve the three actions of a regular remote-controlled gasoline engine toy car, namely, the action of changing the steering direction of the front wheels, the action of forwards/backwards shifting, and the action of accelerating the speed when shifting the gear to backward movement. These three servers each have a swivel arm, and a link, which connects the swivel arm to the front wheel turning mechanism, the forward/backward shifting gear, or the accelerator. A remote controller controls these three servers to achieve the aforesaid three actions. Because three servers are used, only a high-level remote controller can achieve the job of controlling the servers to achieve the desired actions. However, a high-level remote controller is complicated and expensive.

SUMMARY OF THE INVENTION

[0003] The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a backward shifting and accelerating synchronous control system for a remote-controlled gasoline engine toy car, which uses one single server to simultaneously control the shifting of backward gear and the opening of the backward steering control oil valve of the gasoline engine toy car, enabling the toy car to be simultaneously accelerated when shifted to the backward steering mode. According to one aspect of the present invention, the backward shifting and accelerating synchronous control system is installed in a remote-controlled gasoline engine toy car and controlled by a remote controller to move the toy car backwards and to accelerate the speed, comprising an accelerator control unit held in position by a torsional spring and turned to control the oil flow rate of the backward steering accelerating oil valve of the engine of the toy car, a swivel arm, the swivel arm having a first end coupled to the forward/backward steering control mechanism of the gasoline engine toy car by a first link and a second end coupled to the accelerator control unit by a second link, and a server controlled by a remote controller to turn the swivel arm, to further shift the forward/backward steering control mechanism to the backward steering mode and drive the accelerator control unit to open the backward steering accelerating oil valve of the engine of the toy car. According to another aspect of the present invention, the accelerator control unit comprises a swivel arm coupled to the backward steering accelerating oil valve of the engine of the toy car through a link, and driving member driven by the server to turn the swivel arm and to further open the backward steering accelerating oil valve of the engine of the toy car.

BRIEF DESCRIPTION OF THE DRAWINGS

[0004] FIG. 1 is an exploded view of the accelerator control unit according to the present invention.

[0005] FIG. 2 is a sectional view of the present invention, showing the forward/backward steering control mechanism shifted to the forward steering mode, the backward steering accelerating oil valve of the engine closed.

[0006] FIG. 3 is similar to FIG. 2 but showing the forward/backward steering control mechanism shifted to the backward steering mode, the backward steering accelerating oil valve of the engine opened.

[0007] FIG. 4 is a schematic drawing showing the adjustment screw moved with the swivel arm of the accelerator control unit relative to the front protruded portion of the top block of the base frame.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0008] Referring to FIGS. 1 and 2, a backward shifting and accelerating synchronous control system for a remote-controlled toy car in accordance with the present invention comprises an accelerator control unit 1. The accelerator control unit 1 comprises a base frame 10, a torsional spring 11, a swivel arm 12, a first rivet element 13, a driving member 15, and a second rivet element 16. The base frame 10 comprises a top block 101 and two upright rods 102 bilaterally disposed in front of the top block 101. The top block 101 comprises two top screw holes 1011, and a front protruded portion 1012. The upright rods 102 each have a top screw hole 1021. The swivel arm 12 is an elongated rod member comprising a vertical pivot hole 120 disposed at one end thereof, a longitudinal series of vertical through holes 121 disposed at the other end thereof, and a bottom lug 122 disposed at the bottom side and spaced between the pivot hole 120 and the through holes 121. The bottom lug 122 has a horizontal screw hole 1221, and an adjustment screw 123 threaded into the horizontal screw hole 1221 and adapted to limit the swinging angle of the swivel arm 12. The first rivet element 13 comprises a body 130 inserted into the vertical pivot hole 120 of the swivel arm 12, and a through hole 131 axially extended through the center of the body 130. A screw 14 is inserted through the through hole 131 of the first rivet element 13 and threaded into the top screw hole 1021 of one upright rod 102 of the base frame 10 to secure the swivel arm 12 to the base frame 10, enabling the swivel arm 12 to be turned about the first rivet element 13. The torsional spring 11 is mounted on one upright rod 102 (to which the swivel arm 12 is pivoted), having one end connected to the swivel arm 12 and the other end connected to one side of the front protruded portion 1012 of the top block 101 of the base frame 10. When turning the swivel arm 12 about the first rivet element 13, the adjustment screw rod 123 will touch one side of the front protruded portion 1012 of the top block 101 of the base frame 10 to limit the turning angle of the swivel arm 12 (see FIG. 4). The driving member 15 comprises a barrel-like body 150 defining an axial center through hole 1501, two horizontal arms 151 perpendicularly extended from the periphery of the barrel-like body 150 at two sides at different elevations and extended in X-axis direction, and two horizontal wings 152 perpendicularly extended from the periphery of the barrel-like body 150 at two sides and extended in Y-axis direction. The horizontal arms 151 each have a longitudinal series of through holes 1511. The horizontal wings 152 each have a front protruded portion 1521. The second rivet element 16 comprises a body 160 inserted into the axial center through hole 1501 of the barrel-like body 150 of the driving member 15, and a through hole 161 axially extended through the center of the body 160. A screw 17 is inserted through the through hole 161 of the second rivet element 16 and threaded into one top screw hole 1011 of the top block 101 to secure the driving member 15 to the base frame 10, enabling the driving member 15 to be turned about the second rivet element 16.

[0009] FIG. 2 shows the aforesaid accelerator control unit 1 assembled, and installed with a forward/backward steering control mechanism 2, a first server 3, a second server 4, and an engine 5 in the frame body of the remote-controlled toy car.

[0010] The forward/backward steering control mechanism 2 comprises a transmission shaft 21 coupled between the front wheel system and rear wheel system (not shown) of the toy car and revolvably supported on bearings (not shown), the transmission shaft 21 having a polygonal segment 211, a first transmission gear wheel 23 and a second transmission gear wheel 26 respectively revolvably mounted on the transmission shaft 21 at two sides of the polygonal segment 211, the transmission gear wheel 23 comprising an external gear 231 and an internal gear 232, the second transmission gear wheel 26 comprising an external gear 261 and an internal gear 262, a driven gear 22 fixedly mounted on the first transmission gear wheel 23 for synchronous rotation, a driving gear 51 coupled to the engine 5 of the toy car and meshed with the driven gear 22, a movable gear 24 longitudinally slidably mounted on the polygonal segment 211 of the transmission shaft 21 and prohibited from rotary motion relative to the transmission shaft 21 (the movable gear 24 has a polygonal center hole fitting the polygonal cross-section of the polygonal segment 211, so that the movable gear 24 is prohibited from rotary motion relative to the transmission shaft 21), the movable gear 24 comprising a series of teeth 241 around the periphery, the movable gear 24 being moved along the polygonal segment 211 of the transmission shaft 21 between a first position where the teeth 241 are forced into engagement with the internal gear 232 of the first transmission gear wheel 23 for enabling the transmission shaft 21 to be rotated with the first transmission gear wheel 23, and a second position where the teeth 241 are disengaged from the internal gear 232 of the first transmission wheel 23 and forced into engagement with the internal gear 262 of the second transmission gear wheel 26, preventing a rotation of the transmission shaft 21 with the first transmission gear wheel 23, a first idle gear 25 meshed with the external gear 231 of the first transmission gear wheel 23, and a second idle gear 26 meshed between the first idle gear 25 and the external gear 261 of the second transmission gear wheel 26.

[0011] Referring to FIG. 2 again, the aforesaid first server 3 comprises a swivel arm 31, a first link 32 coupled between one end of the swivel arm 31 and the movable gear 24, and a second link 33 coupled between the other end of the swivel arm 31 and one through hole 1511 of one horizontal arm 151 of the driving member 15. Further, a link 53 is coupled between the backward steering accelerating oil valve 52 of the engine 5 and one through hole 121 of the swivel arm 12. The aforesaid second server 4 comprises a swivel arm 41, and a link 42 coupled between the swivel arm 41 and the front wheel steering control mechanism (not shown). By means of controlling the second server 4 to turn the swivel arm 41, the link 42 is driven to move the front wheel steering control mechanism, causing it to change turn the front wheels to the desired direction.

[0012] The present invention uses a remote controller to control the operation of the first server 3 and the second server 4, to further move the swivel arms 31 and 41 and the related links 32, 33 and 42. When starting the engine 5 to rotate the driving gear 51 after the movable gear 24 has been shifted to the position shown in FIG. 3, the driven gear 22 is driven to rotate first transmission gear wheel 23 clockwise, causing it to rotate the first idle gear 25 counter-clockwise, and therefore the second idle gear 27 is rotated clockwise to further rotate the second transmission gear wheel 26 counter-clockwise, thereby causing the transmission shaft 21 to rotate counter-clockwise and to move the toy car backwards. When in the state shown in FIG. 3, the swivel arm 31 moves the first link 32 and the second link 33 of the first server 3, causing the second link 33 to turn the driving member 15 in such direction that the protruded portion 1521 of one wing 152 of the driving member 15 pushes the swivel arm 12 to pull open the backward steering accelerating oil valve 52 wider, so as to accelerate the speed when moving the toy car backwards.

[0013] On the contrary, when moving the movable gear 24 to the position as shown in FIG. 2, the movable gear 24 is meshed with the internal gear 232 of the first transmission gear wheel 23 and rotated with the first transmission gear wheel 23 clockwise by the driving gear 22, the internal gear 232 of the transmission gear wheel 23 rotates the transmission shaft 20 clockwise to move the toy car forwards. At this time the first idle gear 25, the second idle gear 27 and the second transmission gear wheel 26 run idle, and the driving member 15 is turned back to its former position by the second link 33, enabling the rocker arm 12 to be forced back by the torsional spring 11 to release the backward steering accelerating oil valve 52.

[0014] Because the design of the present invention simply uses one server to achieve forward and backward moving control as well as backward moving and accelerating control, the whole structure of the toy car is relatively simple, and the manufacturing cost of the toy car is relatively cheap.

[0015] While only one embodiment of the present invention has been shown and described, it will be understood that various modifications and changes could be made thereunto without departing from the spirit and scope of the invention disclosed.

Claims

1. A backward shifting and accelerating synchronous control system installed in a remote-controlled gasoline engine toy car having a gasoline engine with a backward steering accelerating oil valve and controlled by a remote controller to move said toy car backwards and to accelerate the speed, comprising:

a server unit, said server unit comprising a swivel arm, the swivel arm of said server unit having a first end and a second end, a server controlled to turn the swivel arm of said server unit forwards and backwards, a first link coupled between the first end of the swivel arm of said server unit and the forward/backward steering control mechanism of said gasoline engine toy car, a second link coupled to the second end of the swivel arm of said server unit; and

an accelerator control unit coupled to one end of the second link said server unit remote from the swivel arm and adapted to control the oil flow rate of the backward steering accelerating oil valve of the engine of said gasoline engine toy car, said accelerator control unit comprising a base frame, a swivel arm pivoted to said base frame and coupled to the backward steering accelerating oil valve of the engine of said gasoline engine toy car and turned to close/open the backward steering accelerating oil valve of the engine of said gasoline engine toy car, a link coupled between one end of the swivel arm of said accelerator control unit and the backward steering accelerating oil valve of the engine of said gasoline engine toy car and driven by the swivel arm of said accelerator control unit to control the oil flow rate of the backward steering accelerating oil valve of the engine of said gasoline engine toy car, a driving member pivoted to said base frame and coupled to one end of the second link of said server unit and driven by the second link of said server unit to turn the swivel arm of said accelerator control unit to regulate the oil flow rate of the backward steering accelerating oil valve of the engine of said gasoline engine toy car.

2. The backward shifting and accelerating synchronous control system of claim 1, wherein said base frame comprises a front protruded portion; the swivel arm of said accelerator control unit comprises a bottom lug, said bottom lug comprising a horizontal screw hole, and an adjustment screw threaded into the screw hole of said bottom lug and adapted to act with the front protruded portion of said base frame to limit the turning angle of the swivel arm of said accelerator unit.

3. The backward shifting and accelerating synchronous control system of claim 1, wherein said accelerator control unit further comprises a torsional spring adapted to return the swivel arm of said accelerator unit after each action.

4. The backward shifting and accelerating synchronous control system of claim 1, wherein the swivel arm of said accelerator control unit comprises a series of through holes longitudinally arranged at a free end thereof and selectively connected to one end of the link of said accelerator control unit.

5. The backward shifting and accelerating synchronous control system of claim 1, wherein said driving member comprises a barrel comprising a barrel-like body pivoted to said base frame, two horizontal arms perpendicularly extended from the periphery of said barrel-like body at two sides at different elevations and extended in X-axis direction and selectively coupled to the second link of said server, and two horizontal wings perpendicularly extended from the periphery of said barrel-like body at two sides and extended in Y-axis direction and adapted to move the swivel arm of said accelerator control unit, said horizontal wings each having a front protruded portion adapted to move the swivel arm of said accelerator control unit.

6. The backward shifting and accelerating synchronous control system of claim 5, wherein said horizontal arms each have a longitudinal series of through holes for the connection of the second link of said server selectively.