JPH077997Y2 - Drive unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a drive unit that uses a spring as a power source to obtain rotation via a gear train. More specifically, the present invention relates to a drive unit that obtains rotation by releasing a spring force stored in a power spring by an operation of pushing down the drive unit.

(Prior Art) Conventionally, in a vehicle toy, there is a drive unit that stores a force in a power spring by pushing down the toy and travels by the force. For example, as shown in FIG.
A movable cylinder 102 including a coil spring 101 is provided in a gear box 103, a rack 104 is formed on the movable cylinder 102, a gear train 106 is connected to the output shaft 105, and the movable cylinder 102 is pushed down. Coil spring 10 accumulated by
There is one in which the movement of the movable cylindrical body 102 restored by the force of 1 is transmitted as rotation to the output shaft 105 via the rack 104. The gear train 106 includes a traveling up gear 107 that disengages when the coil spring 101 is compressed and blocks the transmission of rotation to the output shaft side, and a rack for storing spring force in the coil spring 101. 104 movement is output axis
It is provided so as not to be transmitted to 105.

Further, as shown in FIG. 5, there is also one using a torsion coil spring 201 as a power source. This is the drive gear 2
A torsion coil spring 201 is provided between 02 and the gearbox 203.
While installing the part 204 of the drive gear 202 to the gearbox
It is used as a frame for supporting the front wheels of an automobile toy by projecting it out of 203, and the front wheels are moved forward by pushing down the body of the toy whose front has been lifted to drive gear 202
Is directly rotated to store force in the torsion coil spring 201. In addition, reference numeral 205 is a gear train including a running up gear, and 206 is an output shaft.

(Problems to be solved by the invention) However, in any case, a member protruding from the gear box is required to give a motion for storing a force to the power spring. In addition, since the above-mentioned projecting member moves in and out of the body side of the automobile toy, there is a problem in that it requires structural ingenuity and is subject to restrictions.
For example, in the case of the drive unit shown in FIG. 4, in order to actuate the movable cylindrical body 102 for applying the spring force to the coil spring 101 from the outside of the frame of the automobile toy, this movable cylindrical body 10 is used.
There is a hole and a space for the 2 to come in and out, and there are restrictions on use that cannot be made with a car toy having a sealed structure. In the case of the drive unit shown in FIG. 5, the drive gear 202
There is a problem of design restrictions such as using a part of the wheel as a front wheel support frame. Therefore, as the drive gear 202 rotates, the positions of the front wheels move, and the toy car rises while the vehicle is running.

In any case, the conventional drive unit has a problem that its usage is limited.

The present invention is not restricted in use as a drive source for toys,
An object of the present invention is to provide a drive unit that can be used as a drive source for an automobile toy having a closed structure.

(Means for Solving the Problem) In order to achieve such an object, the present invention provides a drive gear that rotates when a power spring is released, an output shaft, and a drive gear that meshes only during traveling rotation of the output shaft. In a drive unit including a gear train including a traveling up gear for transmission to the side, a gear box supporting the gears, and a power spring mounted between the drive gear and the gear box, the gear box is coaxial with the output shaft. An arc-shaped elongated hole whose center of curvature is the center of rotation of the mating gear that meshes with the upper driven pinion is provided to support the output shaft in the gear box so as to be movable in the up-down direction, while the output shaft moves upward. A rotating member that comes into contact with the output shaft and rotates only at the same time is provided coaxially with the drive gear, and the rotating member is rotated by the relative movement of the output shaft upwards to directly accumulate the power spring. I am sorry.

Further, in the drive unit of the present invention, the power spring is a torsion coil spring, and the drive gear is a partial gear integrally formed with the rotating member.

(Action) Therefore, by pushing down the gearbox,
When the output shaft is relatively pushed up, it abuts on the rotating member and pushes it up for rotation. A force is stored in the power spring by this rotation. At this time, the drive gear also rotates, but since the traveling up gear receives rotation in the direction opposite to the traveling rotation and disengages from the gear train, the rotation is not transmitted to the output shaft side. Then, when the hand is released from the automobile toy, the drive gear is rotated by the release of the power spring, and the output shaft is rotated. At this time, the output shaft receives the traveling rotational force of the gear train, moves around the meshing mating gear in the traveling rotational direction, that is, downward in the drawing, and returns to the state before being pushed down to start traveling.

(Embodiment) Hereinafter, the configuration of the present invention will be described in detail based on an embodiment shown in the drawings.

The drive unit of the present invention includes a drive gear 2 integrally formed with a rotating member, an output shaft 3, and a traveling up gear 7 that meshes with the output shaft 3 only when traveling to transmit the rotation of the drive gear 2 to the output shaft 3 side. The gear train 4 includes a gear train 13 for supporting these gears, a drive gear 2 and a power spring 1 mounted between the drive gear 2 and the gear box 13 to store a spring force by the rotation of the drive gear 2. Then, the gear box 13 is provided with a long hole 17 to support the output shaft 3 in a vertically movable manner around a mating gear 8a that meshes with the coaxial driven pinion 9, while the drive gear 2 is connected to the output shaft 3. The drive gear 2 is rotated by the engagement in the moving direction and the vertical movement of the output shaft 3.

More specifically, this drive unit includes a torsion coil spring 1 as a power spring, and the torsion coil spring 1 and the output shaft 3 are connected by a speed increasing gear train 4.
Although not shown, a toy tire or the like is fixed to the output shaft 3.

The gear train 4 meshes with a drive gear 2 to which a torsion coil spring 1 is attached, a first gear 5 meshing with the drive gear 2, a second gear 6 meshing with the first gear 5, and a second gear 6 meshing with the first gear 5. The traveling up gear 7, which travels around it, and the third gear 8 which meshes with the traveling up gear 7 only when traveling and rotating,
The driven pinion 9 on the output shaft 3 that meshes with the third gear 8
It consists of and. The first gear 5 is composed of a pinion 5b that meshes with the drive gear 2 and a gear 5a that meshes with the pinion 6b of the second gear 6, and is integrally molded together with the shaft 5c portion from plastic to form one gear. Second
The gear 6 is composed of the above-mentioned pinion 6b that meshes with the first gear 5 and the gear 6a that meshes with the running up gear 7, and is integrally molded with plastic along with the shaft 6c to form one gear. The third gear 8 is composed of a pinion 8b that meshes with the running upward gear 7 and a gear 8a that meshes with the driven pinion 9, and is integrally molded of plastic together with the shaft 8c to form one gear.

The running up gear 7 has the shaft portion 7c of the second gear 6
Is movably accommodated in an arcuate elongated hole 10 whose center of curvature is the center of curvature of the third gear 8 depending on the rotation direction of the second gear 6.
It is provided so as to mesh with and separate from. That is, when the second gear 6 rotates clockwise (→) as during traveling rotation, the traveling up gear 7 moves in the elongated hole 10 and meshes with the pinion 8b of the third gear 8. However, on the contrary, the second twisting of the torsion coil spring 1
When the gear 6 rotates in the counterclockwise direction (), the running upward gear 7 is pushed upward by the gear 6a of the second gear 6 and moves in the elongated hole 10 to move to the pinion 8b of the second gear 8. Get away from.

The gearbox 13 includes a first frame 13 having engagement pins 14.
A, a second frame 13b having a hole 15 into which the engaging pin 14 is press-fitted, and an intermediate frame 13c sandwiched between them are disassembled and assembled. Then, the first frame and the second frame are provided with elongated holes 17 for accommodating the output shaft 3 so as to be movable in the vertical direction. This long hole 17 is an arc-shaped long hole whose center of curvature is the rotation center of the third gear 8,
It has a length that secures a vertical movement amount of the output shaft 3 sufficient to twist the torsion coil spring 1 by a predetermined amount.

In the case of the present embodiment, the drive gear 2 uses a part of the gear, and an output bearing portion 2b that engages with the output shaft 3 is formed on the opposite side of the tooth portion 2a. This lever-shaped output bearing
2b corresponds to a rotating member that transmits the movement of the output shaft 3 to the spring 1. The surface of the output shaft receiving portion 2b that comes into contact with the output shaft 3 is formed of a curved surface having substantially the same curvature as the output shaft 3, and engages with the output shaft 3 only when the output shaft 3 moves upward. Further, the output bearing 2b is provided with a contact plate 2c which comes into contact with the boss 9a of the driven pinion 9, and the output shaft 3 is brought into contact with the output plate 3 at two points, ie, the contact plate 2c and the output bearing 2b. Is designed so that it does not tilt. The drive gear 2 is rotatably supported by a cylindrical shaft portion 18 protruding from the second frame 13b.
Further, the shaft 8c of the third gear 8 is inserted into the cylindrical shaft portion 18, and the third gear 8 and the drive gear 2 are coaxially arranged. Further, on one surface of the drive gear 2, a torsion coil spring accommodating chamber 11 formed of a concave portion and a spring receiver 12 for fixing one end 1a of the torsion coil spring 1 are formed. A part of the torsion coil spring accommodating chamber 11 is cut out, and the other end 1b of the torsion coil spring 1 is provided so as to project from the drive gear 2 to the second frame side.

One end 1a of the torsion coil spring 1 is folded back so that the torsion coil spring accommodating chamber 11 has a spring bearing.
The second end 1b is in contact with the spring receiving seat 16 formed on the second frame 13b side. Therefore, the torsion coil spring 1 is twisted with the second frame 13b by the rotation of the drive gear 2 in the counterclockwise direction and stores a spring force. The pressure can be accumulated in the torsion coil spring 1 by so-called pullback winding in which the drive unit is pulled rearward while the tire on the output shaft 3 is in contact with the floor or the like. In this case, when the torsion coil spring 1 is twisted by a predetermined amount, the drive gear 2 and the first gear 5
Since the meshing with is disengaged, no more twisting moment is applied.

According to the drive unit of the present invention having such a configuration, it operates as follows.

When a toy equipped with the drive unit of the present invention, such as an automobile toy, is placed on the floor or the like and the frame is pressed from above toward the floor, the frame of the toy is mounted on the output shaft supported by the floor. Is set, the output shaft 3 is relatively pushed up as shown in FIG. At this time, the drive gear 2 is rotated by the output shaft 3 in the direction indicated by the arrow (), and the torsion coil spring 1 is twisted between itself and the second frame 13b to store a spring force. At this time, the rotation of the drive gear 2 is transmitted from the first gear 5 to the second gear 6,
By the rotation of the second gear 6 in the () direction, the traveling upward gear 7 moves counterclockwise in the elongated hole 10 and disengages from the third gear 8, so that the rotation is not transmitted to the output shaft 3 side. Be cut off. That is, the output shaft 3 does not rotate during the operation of storing the spring force in the torsion coil spring 1.

Then, when the automobile toy is released, the torsion coil spring 1 is released and the drive gear 2 rotates in the arrow (→) direction. At this time, the output shaft 3 is, as shown in FIG.
Upon receiving the traveling rotational force of the third gear 8, the third gear 8 moves around the meshing counterpart gear, that is, the gear 8a, in the traveling rotation direction (→), that is, downward in the drawing, and returns to the state before being pushed down to start traveling. This rotation is transmitted to the first gear 5 (pinion 5b → gear 5a) → second gear 6 (pinion 6b → gear 6a), and the long hole 10
The running up gear 7 in the inside is moved in the clockwise direction to mesh with the third gear 8. Therefore, the rotation of the drive gear 2 is further increased by the running uphill gear 7 (pinion 7b → gear 7a).
→ 3rd gear 8 (pinion 8b → gear 8a) → driven pinion 9
→ Transmitted to the output shaft 3 to drive the car toy in the (→) direction.

The above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention. For example, the power spring is not limited to the torsion coil spring, and may be a torsion bar spring or a mainspring. When the torsion bar spring is used, one end of the torsion bar may be fixed to the first frame 13a of the gear box 13 and the other end may be engaged or fixed to the center of the drive gear 2, though not shown. Further, the drive gear 2 uses a part of the gear to make the volume of the gear box 13 compact, but it is not particularly limited to this, and if the storage space allows, use a complete gear. The stroke for accumulating pressure may be lengthened.

(Effects of the Invention) As is apparent from the above description, the drive unit of the present invention has an arc-shaped long length whose center of curvature is the center of rotation of the mating gear that meshes with the driven pinion coaxial with the output shaft in the gearbox. A hole is provided to support the output shaft in the gear box so that it can move approximately vertically, while a rotating member that comes into contact with the output shaft and rotates only when the output shaft moves upward is coaxial with the drive gear. Since the rotating member is provided to rotate the rotating member by the upward relative movement of the output shaft to directly accumulate the pressure of the power spring, the spring force can be accumulated only by pushing down the automobile frame, and when switching to traveling rotation. After that, the output shaft moves in the long hole and returns to the state before being pushed down, and then the traveling is started. Therefore, the posture of the automobile toy does not change during traveling. Moreover, there are special restrictions on the car toy side, such as using holes for moving the operating members and parts to store the spring force for driving and parts of the drive gear as part of the frame. The absence of the drive unit makes the installation and use of the drive unit on the toy extremely easy.

[Brief description of drawings]

FIG. 1 is a front view of a drive unit using a torsion coil spring as a power source according to an embodiment of the present invention. FIG. 2 is a sectional view for explaining the gear arrangement state of the same embodiment by developing it. FIG. 3A is a cross-sectional view taken along the line III-III in FIG. 2 and shows a state where the torsion coil spring is wound. FIG. 3 (B) shows the traveling rotation in the same sectional view. 4 and 5 are sectional views showing an example of a conventional drive unit. DESCRIPTION OF SYMBOLS 1 ... Torsion coil spring (power spring), 2 ... Drive gear, 2a ... Tooth part, 2b ... Output bearing part, 2c ... Contact plate, 3 ... Output shaft, 4 ... Gear train, 7 ... Running up gear, 9 … Driven pinion, 17… A long hole to accommodate the output shaft.

Claims (2)

[Scope of utility model registration request] 1. A drive gear that rotates when a power spring is released, and a gear train that includes a traveling up gear that meshes with an output shaft only during traveling rotation to transmit the rotation of the drive gear to the output shaft side. A drive unit comprising a gearbox supporting these and a drive spring mounted between the drive gear and the gearbox, a counterpart gear meshing with the driven pinion coaxial with the output shaft in the gearbox An arc-shaped elongated hole having the center of rotation as the center of curvature is provided to allow the gearbox to support the output shaft so as to be movable in a substantially vertical direction, and only when the output shaft moves upward. A rotating member that abuts and rotates is provided coaxially with the drive gear, and the rotating member is rotated by the upward relative movement of the output shaft to directly accumulate the power spring. Drive unit, characterized. 2. The drive unit according to claim 1, wherein the power spring is a torsion coil spring, and the drive gear is a partial gear integrally formed with the rotating member.