JP2006075433A - Electric model car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric model car which permits a motor contact connecting a battery and a direct current motor to be easy changed. <P>SOLUTION: The electric model car is detachably provided with a first assembly 6 journaling a pair of wheels 13 driven by the direct current motor 8 powered by batteries 5 in a first prescribed position 2 of a vehicle body 1 and a second assembly 7 journaling a pair of wheels and provided with a power switch in a second prescribed position 3. A battery storage section 4 to store the batteries 5 with the positive and negative poles in the anteroposterior direction between the first prescribed position 2 and the second prescribed position 3, and motor contacts 9 and 10 replaceably arranged in the exterior wall of the first assembly 6 facing the first prescribed position 2 and connecting the batteries and the electrodes of the direct current motor. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric model vehicle, and more particularly to an electric model vehicle configured so that built-in parts including a motor contact can be easily replaced.

  There is known a four-wheel drive type electric model vehicle in which steering is performed by guide rollers provided at the four corners of the cover of the vehicle being guided along the left and right wall surfaces of the endless track. According to this electric model car, after children and the like are completed by assembling an assembly kit, they can enjoy by starting two at the same time on a circuit having a dedicated runway of at least two lanes and competing for the arrival order.

  This electric model car has a “dedicated tune-up kit” such as a direct current motor that generates stronger torque in place of the direct current motor enclosed in the assembly kit, and a gold-plated motor contact with a lower electrical resistance. They are being sold, and by purchasing them and installing them as appropriate, the company's competitiveness is enhanced to make it more interesting. For this reason, care is taken so that even a child can perform disassembly and assembly work with or without a simple tool.

On the other hand, in a radio controlled vehicle, sockets (connectors) are provided in each of a front wheel unit having a steering function, a rear wheel unit that drives a rear wheel by being driven by a motor, and a control unit that controls traveling by radio control. It has been proposed to be configured to be detachable by a plug-in method (Patent Document 1).
Japanese Utility Model Publication No. 62-128596.

  However, according to the proposal of the above-mentioned Patent Document 1, since it is an object to simplify the product assembly work, it is difficult to exchange the dedicated tune-up kit as described above. For this reason, it is practically impossible for a child or the like to perform the operation of exchanging the motor contact for electrically connecting the electrode of the DC motor and the electrode of the battery.

  In addition, according to the above-described four-wheel drive electric model car, the motor contact cannot be replaced unless the DC motor is once taken out. For this reason, for example, it may be inconvenient in the case of competing for an instant to perform exchange work before the next race during the competition.

  Therefore, the present invention has been made in view of the above-mentioned problems, and in the dedicated tune-up kit, an electric model vehicle capable of easily exchanging the motor contacts connecting the battery and the DC motor. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, according to the present invention, a first assembly for supporting a pair of wheels driven by a DC motor powered by a battery is used as a first predetermined body of a vehicle body. An electric model vehicle in which a second assembly that pivotally supports a pair of wheels and that is provided with a power switch is detachably provided at a second predetermined position of the vehicle body. A battery accommodating portion that accommodates the positive and negative electrodes of the battery in the front-rear direction between a position and the second predetermined position, and an outer wall surface of the first assembly that faces the first predetermined position. And a motor contact for connecting between the battery and the electrode of the DC motor.

  Further, a fixing hole is formed in the motor contact, and the hole is fitted and fixed to a convex portion formed on the outer wall surface so that the electrode faces the motor contact. Further, the direct current motor is arranged in the first assembly to make the motor contact exchangeable.

  Further, the power switch of the second assembly is provided so as to be operable from the outside through an opening formed in the bottom surface of the vehicle body.

  The second assembly includes a base and a lid fitted to the base, and the power switch includes a switch contact provided to be replaceable with respect to the base, and the switch contact. A switch component that is pivotally supported between the base and the lid so as to be in an energized state and a non-energized state between the positive and negative electrodes of the battery is provided.

  Further, the pair of wheels of the first assembly is a rear wheel, the pair of wheels of the second assembly is a front wheel, and a drive mechanism for transmitting a driving force of the rear wheel to the front wheel. Furthermore, it is characterized by providing.

  And a cover that is detachably attached to the vehicle body and that maintains the first assembly and the second assembly in an immobile state, along the traveling direction at the four corners of the cover. And a guide roller provided rotatably, and the guide roller performs a steering function by being guided along the left and right wall surfaces of the endless track.

  ADVANTAGE OF THE INVENTION According to this invention, the electric model vehicle which can replace | exchange easily the motor contact which connects between a battery and a DC motor can be provided.

  In the following, a preferred embodiment of the present invention will be described with reference to the accompanying drawings, and the present invention can be modified and changed in various ways, and specific examples are illustrated in the drawings. However, the present invention is not limited to these and is not limited to the four-wheel drive vehicle described later. It can be applied to front-wheel drive FF vehicles and rear-wheel drive FR vehicles, and can be applied to all electric model vehicles.

  First, FIG. 1 is a three-dimensional exploded view of an electric model automobile according to an embodiment of the present invention, showing a state before a cover is attached. In this figure, each part shown in the figure is injection-molded using, for example, an ABS resin material, and a gear for transmitting power is injection-molded from a nylon-based resin material. The rubber tire is made of natural rubber or synthetic rubber, the axle and shaft are made of metal, the contact is made of phosphor bronze, and materials are appropriately selected and prepared as shown.

  The vehicle body 1 is integrally molded so as to have sufficient strength to withstand the load applied during traveling, and the left side in the figure is the front and the right side is the rear. A rod member 1c, which serves as a locking portion when a cover described later, is attached to the front, is formed between the left and right shape portions. In addition, an opening 1k is provided behind the bar member 1c so that a power switch described later can be operated from the bottom side of the vehicle body.

  On the other hand, a bumper portion 1a for receiving an impact at the time of dropping is extended from the left and right shape portions behind the vehicle body 1. Also, two cover attachment holes 1b are provided on the left and right sides near the bumper portions 1a of the left and right shape portions.

  A first predetermined position 2 provided with four mounting holes 2 a is integrally formed behind the vehicle body 1, and a rear wheel 13 driven by a DC motor 8 with respect to the first predetermined position 2. , 13 is set as shown by a one-dot chain line in the figure. That is, four studs 11a (only two places are shown in the drawing) extending downward from the base 11 constituting the first assembly 2 are press-fitted or positioned and set in the four mounting holes 2a. Thus, it is integrated with the vehicle body 1.

  On the left side of the first predetermined position 2, a battery housing portion 4 for housing the positive and negative electrodes of the two AA batteries 5 and 5 serving as batteries in the front-rear direction is integrally molded together with a positive / negative display portion. In addition, a groove portion 1f is further integrally formed in the battery housing portion 4 so as to be parallel to the longitudinal direction, and a metal shaft 40 having a gear 41 fixed to the left and right end portions is set to the groove portion 1f. Thus, a transmission mechanism for transmitting the driving force of the rear wheels to the front wheels as described later is configured so that the shaft 40 can rotate in the groove portion 1f.

  Further, the opening 1k is formed on the left side of the battery housing portion 4, and a second predetermined position 3 provided with four attachment holes 3a is integrally formed. The second assembly 7 provided with the front wheels 14 and 14 with respect to the predetermined position 3 is set as indicated by a one-dot chain line in the drawing. That is, four studs 15a (only three are shown in the drawing) extending downward from the base 15 constituting the second assembly 7 are press-fitted or positioned in the four mounting holes 3a. It is set and integrated with the vehicle body 1.

  As described above, the first assembly 6, the second assembly 7, and the dry battery 5 are configured to be easily detachable from the vehicle body 1 without using a tool. Moreover, the upward lifting is completely prevented by fixing a cover described later.

  Next, FIG. 2 is a three-dimensional exploded view of the first assembly 6 of FIG. In this figure, components that have already been described are denoted by the same reference numerals and description thereof is omitted, and the rear wheels 13 and 13 are completed by pressing the rubber tires 17 into the resin wheels 46. Thereafter, a metal hexagonal columnar axle 18 is press-fitted and fixed to one of the rear wheels 13, and a brass eyelet 27 and a bush 28 with the flange portion directed toward the wheel 46 are inserted, and the axle of the base 11 is inserted. Inserted into one of the shaft support holes 21, inserted through the gear 31 and crown gear 32, inserted into the other axle support hole 21, inserted through the bush 28 and eyelet 27, and pressed and fixed the other of the rear wheels 13. To do. Since the gear 31 and the crown gear 32 are formed with hexagonal holes that match the hexagonal columnar axle 18, power can be transmitted to the rear wheel 13 via the gear 31. Further, when the first assembly 6 is set, the crown gear 32 can be brought into mesh with the gear 41, so that power can be transmitted to the front wheels.

  A gear case portion 22 having a shaft support hole portion formed on the side surface is integrally formed on the base portion 11, and supports the intermediate gear 30. The intermediate gear 30 is integrally formed with a gear portion that meshes with the gear 31 and a gear portion that meshes with a gear 29 fixed to the output shaft of the DC motor 8, and a metal shaft 33 is formed in the gear case portion 22. It is configured so that it can be easily taken out by being detachably held in the case.

  The direct current motor 8 is set so that the electrodes 8a and 8b located on the bottom surface of the direct current motor 8 are located downward as shown in the figure, and further bent in the downward direction to be in a stationary state in the motor housing portion 20. Is done. Since the DC motor 8 is a target of the above-mentioned “dedicated tune-up kit”, it may be frequently replaced. Therefore, a lid 12 that is opened and closed in the direction of the arrow is provided above the base 11.

  The lid body 12 is elastically deformed and locked to the shaft support portions 12 a and 12 a that are pivotally supported by the holes 25 and 25 of the base portion 11 and the locking portion 26 formed on the inner wall of the motor housing portion 20. The locking claw 12b is integrally molded, and while the closed state as shown in FIG. 1, the DC motor 8 is pressed down to prevent the lifting, while the replacement of the motor, the locking claw 12b The DC motor 8 and the intermediate gear 30 can be taken out by releasing the lock and rotating the lid 12 upward about the shaft support portions 12a and 12a.

  A positive motor contact 9 and a negative motor contact 10 are replaceably provided on the base 11 of the first assembly 6 configured as described above so as to face the first predetermined position 2 of the vehicle body 1. Yes.

  The positive motor contact 9 has a base portion formed in a substantially L shape, a positive contact portion 9a that is erected substantially vertically above one end of the base portion and elastically deforms by contacting the positive electrode of the dry battery, The contact portion 9b is provided at the other end of the base portion and contacts the electrode 8b of the direct current motor 8 so as to be elastically deformed appropriately to supply power.

  The negative motor contact 10 has a substantially rectangular base portion, a negative contact portion 10a that is erected substantially vertically upward from one end of the base portion and elastically deforms by contacting the negative electrode of the dry battery, and the base portion And a contact portion 10b that is appropriately elastically deformed by contacting the electrode 8b of the DC motor 8 to supply electric power. The positive motor contact 9 and the negative motor contact 10 are integrally pressed.

  A hole 9 c is formed in the middle of the base of the positive motor contact 9. A hole 9d is formed in the positive contact 9a. The positive motor contact 9 is a protrusion formed on the bottom wall surface of the base 11 after the contact 9 b is inserted into an opening (not shown) provided on the bottom of the base 11 of the first assembly 6. By fitting into the portion 36 and further fitting the hole portion 9d into the convex portion 23 formed on the vertical outer wall surface of the base portion 11, it is attached to the base portion 11 in a replaceable manner.

  On the other hand, a hole 10 c is formed near the other end of the base of the negative motor contact 10. Further, a hole portion 10d is formed in the negative electrode contact portion 10a. The negative motor contact 10 is a convex formed on the bottom wall surface of the base 11 after passing the contact 10 b through an opening (not shown) provided on the bottom of the base 11 of the first assembly 6. By fitting into the portion 35 and further fitting the hole portion 10d with the convex portion 24 formed on the vertical outer wall surface of the base portion 11, the hole 11d is replaceably attached to the base portion 11.

  As described above, the motor contacts 9 and 10 are replaceably disposed on the outer wall surfaces of the vertical surface and the bottom surface of the base 11 of the first assembly 6 so that the DC motor 8 can be quickly replaced without being taken out. Become.

  Next, FIG. 4 is a three-dimensional exploded view of the second assembly 7 of FIG. In this figure, components that have already been described are denoted by the same reference numerals and description thereof is omitted. When the front wheels 14 and 14 are inserted into the resin wheels 46, the rubber tires 17 are press-fitted in the same manner as the rear wheels. To be completed. Thereafter, a metal hexagonal column-shaped axle 18 is press-fitted and fixed to one of the front wheels 14, and a brass eyelet 27 and a bush 28 with the collar portion facing the wheel 46 are inserted, and a pair of base portions 15 are inserted. The axle shaft support hole 15f (only the front side is shown in the drawing) is inserted, the crown gear 32 is inserted, the front axle support hole 15f is inserted, the bush 28 and the eyelet 27 are inserted, and the front wheel 14 is inserted. The other side is press-fitted and fixed. The crown gear 32 is formed with a hexagonal hole that matches the hexagonal columnar axle 18, so that power can be transmitted to the front wheel 14 via the gear 41. That is, when the second assembly 7 is set with respect to the vehicle body 1 as described with reference to FIG. 1, the crown gear 32 meshes with the gear 41, so that power transmission to the front wheels can be achieved. It becomes possible.

  The base portion 15 is provided with a switch contact 50 constituting a power switch so as to be easily exchangeable as will be described later. Further, a hole is formed in the base portion 15, and a pair of locking claw portions 16a extending from the lid body 16 are inserted into the hole portion and then elastically deformed to maintain the locked state. Thus, the base portion 15 and the lid body 16 are integrated, and the switch component 51 is pivotally supported between the base portion 15 and the lid body 16 to be completed. The switch component 51 can be operated from the outside through the opening 16a of the lid body 16. For this purpose, an annular portion 51f, a flange portion, a shaft support portion 51a, and a shape portion 51b that contacts the switch contact 50 are illustrated. Are integrally molded. The opening 16a is formed in the lid 16 so that when the second assembly 7 is set on the vehicle body 1, the opening 1k of the vehicle body 1 and the opening 16a are substantially aligned with each other.

  FIG. 5A is a plan view of the base 15 viewed from the bottom surface side of the vehicle body 1, FIG. 5B is an external perspective view of the operation explanation when the power switch is in an OFF state, and FIG. It is an external appearance perspective view for description.

  In this figure, components similar to those already described in FIG. 4 are denoted by the same reference numerals and description thereof is omitted. The switch part 51 is integrally formed with a grip part 51k that is gripped by a fingertip and rotated. Yes. On the other hand, the switch contact 50 is press-worked so that a negative contact portion 50a that contacts the negative electrode of the battery 5 and a positive contact portion 50b that always contacts the positive electrode have the shape shown in the figure. Between 15h and 15j, the positive contact portion 50b is press-fitted and is set in an immobile state.

  With the above configuration, when the switch component 51 is in the OFF state as shown in FIG. 5B, the negative contact portion 50a is in a position retracted from the battery. Further, as shown in FIG. 5C, when the switch part 51 is rotated in the direction of the arrow by pinching the grip part 51k with a fingertip, the shape part of the switch part 51 located on the back side of the negative contact part 50a. When 51b is moved in the direction of the arrow in FIG. 5 (c), the negative contact portion 50a is pushed out in the same direction, so that the battery is brought into conduction. As a result, the switch is turned on. Moreover, in order to turn off, it rotates to a reverse direction. When the second assembly 7 configured as described above is set as shown in FIG. 1, the opening 16a of the second assembly 7 and the opening 1k of the vehicle body 1 substantially coincide as described above. Therefore, the switch component 51 can be operated through the opening 1k of the vehicle body 1.

  Next, FIG. 6 is a three-dimensional exploded view of the cover 60. The cover 60 is a streamline type as shown, and is prepared by being integrally molded from ABS resin. This cover 60 produces a function for maintaining the first assembly 6, the second assembly 7 and the dry battery 5 on the vehicle body 1 in a stationary state after the first assembly 6, the second assembly 7 and the dry battery 5 are set, and a feeling of scale close to that of a real vehicle. And a function of providing guide rollers 61 that are rotatably provided along the traveling direction at the four corners of the cover 60.

  For this reason, each guide roller 61 is rotatably fixed via a stepped screw 65 and a metal washer 66 which are screwed to the shaft portions of the shaft supporting members 62 and 63, and each shaft supporting member 62 and 63 is fixed. Is fixed to the cover 60 and is guided at four corners. The shaft support member 63 is further fastened together with a member 64 to be screwed.

  On the other hand, the cover 60 includes a locking member 70 formed on a locking portion formed on the left and right side surfaces of the vehicle body 1 and a locking member 70 locked on a locking portion formed on the rear side of the vehicle body 1. It is further provided via a member 71 to be screwed, and by operating these locking members 70 with one touch, it can be fixed to the vehicle body 1 without using a tool.

  That is, the locking member 70 is composed of left and right wall surfaces and upper and lower bar members for connecting the left and right wall surfaces in the vertical position as shown in the figure. And is integrally molded from a resin material so as to form a claw portion in the lower bar member. Further, as shown in the drawing, the locking portions integrally molded from the side surface and the rear surface of the cover 60 are projected and molded so as to be able to pivotally support the bar member above the locking member 70. By inserting the opening of the locking member 70 into the locking portion, the rotation shaft can be supported as described above, and then the cover 60 is set on the vehicle body 1 and then the vehicle body It is comprised so that the nail | claw part of a lower bar member may be pressed and fitted and fixed with respect to the other latching | locking part formed in the side surface of 1 and the rear surface. In addition, when it is desired to remove the cover 60 from the vehicle body 1, consideration is given so that the cover 60 can be removed without using a tool since the reverse procedure may be performed. For this reason, when the cover 60 is damaged due to a crash, the cover 60 can be replaced easily and within a short time when it is desired to replace the cover 60 with a more excellent aerodynamic characteristic.

  Finally, FIG. 7 is an external perspective view of the electric model automobile 100 after completion. After completion, when the electric model car 100 is switched on the lane of the endless road 200 and the four-wheel drive state of the rear wheel 13 and the front wheel 14 is reached and dropped on the road, the driving starts in the double arrow direction, and the cover 4 The corner guide rollers 61 are guided along the left and right wall surfaces 201 of the endless runway, whereby the competition is performed at a high speed while steering is performed.

  Then, if it is desired to replace the motor contacts 9 and 10 from the result of the competition, it is possible to quickly replace the DC motor 8 without taking it out by exchanging from the outer wall surfaces of the base 11 of the first assembly 6 from the vertical and bottom surfaces. It will be possible. Similarly, the switch contact 50 can be easily replaced.

  In addition, the contact points can be easily exchanged in the front-wheel drive FF vehicle and the rear-wheel drive FR vehicle.

It is a three-dimensional exploded view of the electric model automobile which is one embodiment of the present invention. FIG. 2 is an exploded view of the first assembly 6 in FIG. 1. It is a bottom view of the base 11 of FIG. FIG. 3 is an exploded view of the second assembly 7 in FIG. 1. (A) is a plan view of the base 15, (b) is an external perspective view for explaining the operation when the power switch is in an off state, and (c) is an external perspective view for explaining the operation when the power switch is in an on state. 3 is a three-dimensional exploded view of a cover 60. FIG. It is an external perspective view of the electric model automobile 100 after completion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 1st predetermined position 3 2nd predetermined position 4 Battery accommodating part 5 Battery 6 1st assembly 7 2nd assembly 8 DC motor 9 Positive motor contact 10 Negative motor contact 11 Base 12 Opening / closing lid 13 Wheel (Rear wheel)
14 wheels (front wheels)
15 Base 16 Lid 17 Rubber Tire 18 Axle 20 Motor Housing 21 Axle Support Hole 22 Gear Case 23, 24 Projection 25 Shaft Support Hole 26 Locking Part 27 Eyelet 28 Bush 29 Motor Gear 30 Intermediate Gear 31 Drive Gear 32 Crown Gear 33 Shaft 35, 36 Convex 40 Shaft 41 Gear 50 Switch contact 51 Switch component 60 Cover 61 Guide roller 100 Electric model car

Claims (6)

A first assembly that pivotally supports a pair of wheels driven by a DC motor powered by a battery is provided at a first predetermined position of the vehicle body, and a second switch that pivotally supports the pair of wheels and is provided with a power switch. An electric model vehicle in which the assembly is detachably provided at the second predetermined position of the vehicle body,
A battery accommodating portion for accommodating the positive and negative electrodes of the battery in the front-rear direction between the first predetermined position and the second predetermined position;
A motor contact that is replaceably disposed on an outer wall surface of the first assembly facing the first predetermined position, and that connects between the battery and an electrode of the DC motor;
An electric model car comprising:   A fixing hole is formed in the motor contact, the hole is fitted and fixed to a convex portion formed on the outer wall surface, and the electrode is opposed to the motor contact. The electric model automobile according to claim 1, wherein the exchange of the motor contacts is made possible by disposing the DC motor inside the first assembly.   3. The electric model vehicle according to claim 1, wherein the power switch of the second assembly is operated from the outside through an opening formed in a bottom surface of the vehicle body. 4. . The second assembly includes a base and a lid fitted to the base,
The power switch is
Switch contacts provided interchangeably with respect to the base;
And a switch component pivotally supported between the base and the lid so that the switch contact is in an energized state and a non-energized state between the positive and negative electrodes of the battery. Item 4. The electric model car according to Item 3.   The pair of wheels of the first assembly is a rear wheel, the pair of wheels of the second assembly is a front wheel, and further includes a drive mechanism that transmits a driving force of the rear wheel to the front wheel. The electric model automobile according to any one of claims 1 to 4, wherein the electric model automobile is provided.   A cover that is detachably attached to the vehicle body and that maintains the first assembly and the second assembly in a stationary state, and is rotated along the traveling direction at the four corners of the cover. The electric model automobile according to claim 5, further comprising a guide roller that is movably provided, wherein the guide roller is guided along the left and right wall surfaces of the endless running road.

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