JPH0712386B2 - Mainspring drive unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive unit using a mainspring, and more particularly to a drive unit having a function of randomly switching the number of rotations on the output shaft side when the elasticity stored in the mainspring is released. is there.

[0002]

2. Description of the Related Art Conventionally, a mainspring drive unit has a gear device configured to transmit the release of elasticity stored in the mainspring to a driven part such as a wheel. Since the numbers are different, in order to equalize the number of rotations on the output shaft side as much as possible, a speed governor including an escape wheel and an pallet fork facing the gear wheel was provided on one side of the gear device.

However, since the positional relationship between the escape wheel and the pallet fork of the speed governor is fixed, the above-mentioned conventional mainspring drive unit has a predetermined speed control function for always maintaining a constant speed. However, there is a defect that the rotation speed on the output shaft side cannot be changed.

[0004]

SUMMARY OF THE INVENTION The present invention has been invented in view of the above-mentioned problems of the conventional type, and constitutes a cam device utilizing the rotation of a winding shaft of a mainspring.
It is an object of the present invention to provide a mainspring drive unit that is configured with a speed adjusting means that responds to the cam device, and that the rotational speed of the output shaft when the mainspring is released can be randomly switched by the speed adjusting means. is there.

[0005]

The mainspring drive unit of the present invention is characterized by having the following requirements. That is, (a) in the unit case body, a mainspring, a winding shaft for winding the mainspring, an output shaft linked to the winding shaft via the first gear group, and a cam disk linked to the winding shaft. A rotary shaft that is linked to the winding shaft via a second gear group is provided.
(B) The rotating shaft is provided with a rotating piece that rotates integrally with the rotating shaft. (C) The unit case body is provided with a swing member that slides on the cam disc and swings. (D) A speed adjusting member for adjusting the rotation speed of the rotating piece is provided on one side of the swinging member so as to contact the rotating piece.

[0006]

According to the present invention having the above-mentioned structure, when the winding shaft of the mainspring is wound up and the hand is released, the output shaft is rotated via the winding shaft and the first gear group by releasing the livestock power of the wound spring. To do. On the other hand, the rotary piece also rotates via the second gear group and the rotary shaft. At this time, since the rotation of the winding shaft is also transmitted to the cam disc to rotate, the swing member provided on the unit case body swings as the cam disc rotates. Then, the speed control member moves around the swing fulcrum of the swing member while contacting the rotating piece. Therefore, the contact position of the speed control member with respect to the rotating piece is different, the rotating speed of the rotating piece changes, and the rotating speed of the output shaft changes via the rotating shaft, the second gear group, the winding shaft, and the first gear group. Will be done.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 shows the essential structure of a gear device of a mainspring drive unit. A winding knob 1a is attached to an end of the winding shaft 1 and a winding base 3 having a locking projection 31 for hooking the inner end 21 of the mainspring 2 to the other end.
Is attached. A drive gear 4 is provided concentrically with respect to the base portion 3, and two claw members 32 are projectingly provided on the base portion 3 as clutch means for engaging with the drive gear 4. Is formed with a sawtooth-shaped latch gear 41. An output shaft 5 having a pinion 51 that meshes with the drive gear 4 is borne near the side of the drive gear 4. As a speed increasing gear device for rotation of the output shaft 5, the output shaft 5 is integrally provided via the pinion 51 and a boss portion 5c. A spur gear 52 is formed, and a spur gear 54 having a pinion 53 meshing with the spur gear 52 and a rotary shaft 61 having a pinion 55 meshing with the spur gear 54 are provided, and the rotary shaft 61 has a substantially triangular shape. The rotating piece 6 is formed. on the other hand,
A round hole 42 of the drive gear 4 is provided in the base 3 of the winding shaft 1.
A spur gear 33 protruding through the output shaft 5 is formed.
The spur gear 33 is configured to mesh with the gear 71 formed on the cam disk 7 rotatably mounted on the boss portion 5c. Two annular grooves 7a and 7b are formed on the side surface of the cam disk 7, a guide groove 7c obliquely connected to one side of the annular grooves 7a and 7b, and grooves 7a and 7b connected to the guide groove 7c. On the outlet side, tapered step portions 7d and 7e are formed so as to project toward the outlet side. A swinging member 8 having a projection 81 for engaging with the groove of the cam disk 7.
As shown in FIG. 3, the swing member 8 is swingably supported by the bearing 2b of the partition 2a of the frame member 11 of the unit case body 10 and passes through the elongated hole 2c of the partition 2a.
An operating shaft 82 of the rocking member 8 is provided in a protruding manner, and a substantially U-shaped speed adjusting member 9 is rotatably attached to the operating shaft 82, and the rotating piece 6 contacts the inner surface 91 of the tuning speed member 9. It is arranged so that it can move freely. FIG. 4 shows an embodiment of a horse toy using the above mainspring drive unit A. Eccentric cams 5a are attached to the output shafts 5 projecting to both sides of the frame member 11 of the unit A, respectively. On the outside of the cam 5a, a recess 6a engaging with the cam 5a and the support shaft 1 of the frame member 11 are provided.
A drive member 6A having a long groove 6b for engaging with the long groove 2 and a long groove 6c for interlocking is provided, and the other supporting portion 13 of the frame member 11 has an arm 8 having a projection 8a for engaging with the long groove 6c.
An interlocking member 8A having b is swingably attached. As shown in FIG. 5, the mainspring drive unit A is attached with a split body B of the horse toy, and is attached to the shaft 6B of the drive member 6A and the shaft 8B of the interlocking member 8A protruding from the openings on both sides of the body B. Has a front foot 9A and a rear foot 9B, respectively.

In the above structure, when the mainspring 2 is wound in the clockwise direction while holding the knob 1a, the winding base 3
Also rotates in the clockwise direction, but the pawl member 32 does not move to the latch gear 41.
Drive gear 4 does not rotate. On the other hand, due to the rotation of the winding base 3, the spur gear 33 also rotates clockwise, and the cam disk 7 rotates counterclockwise. Therefore, the protrusion 81 of the rocking member 8 that engages with the grooves 7a and 7b formed on the side surface of the cam disk 7 slides along the groove 7a or 7b, and is provided on the rocking member 8. The contact position of the speed control member 9 with respect to the rotating piece 6 is set. When the hand is released, the pawl member 32 of the base portion 3 is engaged with the latch gear 41 by the counterclockwise torque when the mainspring 2 is released, the drive gear 4 is integrally rotated, and the pinion that meshes with the drive gear 4 is engaged. The output shaft 5 is driven by 51. The rotating piece 6 of the rotary shaft 61 is rotated at high speed via a speed increasing gear including a spur gear 52, a pinion 53, a spur gear 54, a pinion 55, and the like which are connected to the drive gear 4. On the other hand, separately from this, the cam disk 7 is driven in the clockwise direction via the spur gear 33 and the gear 71 by the counterclockwise rotation of the spiral winding shaft 1. At this point, if the projection 81 of the rocking member 8 is engaged with the groove 7a on the outer side of the cam disk 7, the speed adjusting member 9 is moved to the position shown in FIG. Is pushed out to the position indicated by the dotted line in FIG. 3 and the projection 81 of the swing member 8 is forcibly forced along the slanted guide groove 7c by the clockwise rotation of the cam disk 7 to the inner groove 7b.
The speed regulating member 9 is retracted to the position indicated by the solid line in FIG. In this way, the speed control member 9 is moved left and right according to the rotational position of the cam disk 7, and the rotary piece 6 is provided so as to come into contact with the inner surface 91 of the speed control member 9. The rotation speed of the rotating piece 6 is regulated based on the position of the member 9. That is, the rotating piece 6
On the other hand, if the speed control member 9 is located at the position of the right side dotted line, which is greatly related, the force for vibrating the speed control member 9, that is, the braking effect is increased, and the position where the speed control member 9 is retracted to the left side of the rotating piece 6 is small. If it is, the braking effect will be small. As a result, in this case, the rotation of the output shaft 5 is initially slow, and the rotation speed of the output shaft 5 is automatically increased so that the rotation of the output shaft 5 suddenly increases at an unspecified time point according to the rotation of the cam disk 7. Can be switched. The timing of this switching is such that the rotation of the rotary piece 9 is braked in relation to the position where the hand is released from the mainspring winding shaft 1, that is, the initial movement position of the cam disk 7, and as a result, the output shaft 5 The rotation speed of can be switched randomly. According to the horse toy of FIG. 5 using the mainspring drive unit A, the horse toy, which was initially running at a normal speed, can be operated to run suddenly at a certain point. The time of the spurt of this horse toy cannot be predicted at random. For example, if multiple horse toys are run side by side, each horse toy's spurts will be applied differently. It can be performed.

[0009]

As described above, according to the mainspring drive unit of the present invention, by utilizing the rotation of the mainspring winding shaft,
The speed adjusting member can be moved corresponding to the rotational position of the cam disk linked to this, and the rotational speed on the output shaft side can be restricted based on the position of the tuning speed member. This is related to the position where the hand is released from the mainspring winding shaft, that is, the initial moving position of the cam disk and its rotation, and as a result, the rotation speed on the output shaft side can be randomly switched. As a result, by using this mainspring drive unit, various running toys having different running speeds can be configured, and when applied to a horse racing toy or the like, horse racing play in which the finish order of goals can be competed can be performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of a gear configuration of a mainspring drive unit according to an embodiment of the present invention.

FIG. 2 is a side view showing a configuration of a main part of the mainspring drive unit.

FIG. 3 is a side view of the main part of another cross section of the mainspring drive unit.

FIG. 4 is an exploded perspective view of a main part of a horse toy that also uses a mainspring drive unit.

5 is an exploded perspective view of relevant parts of the horse toy of FIG. 4 in an assembled state.

[Explanation of symbols]

 1 Spring Winding Shaft 2 Spring 3 Base 33 Spur Gear 4 Drive Gear (First and Second Gear Group) 41 Latch Gear 5 Output Shaft 51 Pinion (First and Second Gear Group) 52 Spur Gear (Second Gear Group) 53 pinion (second gear group) 54 spur gear (second gear group) 55 pinion (second gear group) 6 rotating piece 61 rotating shaft 7 cam disk 71 gear 8 rocking member 9 speed adjusting member 10 unit gear -Su body

Claims (1)

[Claims] 1. A mainspring drive unit having the following requirements. (A) In the unit case body, a mainspring, a winding shaft for winding the mainspring, an output shaft linked to the winding shaft via the first gear group, a cam disc linked to the winding shaft, and a winding shaft. A rotary shaft that is linked to the shaft via a second gear group is provided. (B) The rotating shaft is provided with a rotating piece that rotates integrally with the rotating shaft. (C) The unit case body is provided with a swing member that slides on the cam disc and swings. (D) A speed adjusting member for adjusting the rotation speed of the rotating piece is provided on one side of the swinging member so as to contact the rotating piece.