JPH07328238A - Driving device of tricky device - Google Patents

Abstract

PURPOSE:To drive plural movable decorations with a single driving motor, to prevent a mechanism from being damaged and to prevent directions mutually among the plural movable decorations from being disordered. CONSTITUTION:The driving motor is fitted to a machine body case for rotationally driving a doll, an intermediate gear 8 to be rotationally driven by the driving motor and plural transmission wheel train T branched from this intermediate gear are provided inside the machine body case, and the doll to be rotationally driven by the respective transmission when trains T is provided on the machine body case. Then, the intermediate gear 8 is provided with a slip mechanism S to be slipped when load torque larger than a fixed level is applied and inside the machine body case, a sensor 10 is provided to detect the rotating angle of the doll 2 by detecting the rotating angle of a rotary board 6 in the transmission wheel trains T.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a mechanical device mounted on, for example, a wall clock.

[0002]

2. Description of the Related Art Conventionally, a so-called mechanical clock having a mechanical device that allows a doll, an animal or the like to perform a certain operation such as playing a musical instrument in accordance with a melody has been widely used on the hour. There are various types of mechanical clocks, from a simple mechanism provided in a table clock or a wall clock to a complex mechanical device provided in a large clock on the street. Among these mechanical devices, those equipped with a wall clock or the like have a small size and a simple structure, and thus the operation is simple. However, cost reduction is achieved by realizing mass productivity.

A simple one of these karakuri devices is such that a movable ornament such as a doll or an animal makes a certain movement in accordance with a melody, but when it becomes a little complicated, the movable ornament moves back and forth. Or, the action to change the direction is added. Among these conventional examples, the rotation mechanism in the case of changing the direction of a doll, an animal, or the like is such that the rotation of the drive motor is rotated via a train wheel or a timing belt to rotate a rotation base provided with a movable ornament. There is. In the case of a plurality of movable ornaments, each of them is provided with a drive motor and a transmission mechanism such as a train wheel so as to be individually operated.

[0004]

In the Karakuri device provided with a plurality of movable ornaments as described above, it is necessary to individually provide a drive motor and a rotation transmission means to rotate each movable ornament. It is complicated, and the number of parts and the number of assembling steps increase, which causes a high cost.

Further, in the conventional example, since the rotation of the drive motor is decelerated by the train wheel composed of a large number of gears or the timing belt, the reduction gear ratio becomes large, and when the rotating force acts on the movable ornament, the train wheel is moved. In some cases, it was impossible to reverse, and the train wheel and timing belt were sometimes damaged. Also,
When the movable decoration rotates by a predetermined rotation angle, it may start to gradually shift due to inertial force, etc., and the balance between the orientations of the two movable decorations may be lost, and the value as a decoration may be improved. It may decrease.

Therefore, an object of the present invention is to enable a plurality of movable decorations to be driven by a single drive motor,
It is intended to reduce the cost of the driving device of the mechanism and prevent damage to the rotation transmitting mechanism and prevent the balance of the orientation between the movable ornaments in a predetermined state from being lost.

[0007]

In order to achieve the above-mentioned object, a drive device for a mechanical device according to the present invention is such that a drive motor is attached to a mechanical case for rotationally driving a movable ornament. Inside, there are provided an intermediate gear that is rotationally driven by a drive motor, and a plurality of transmission wheel trains that branch into a plurality from this intermediate gear, and on the mechanical body case,
Each of the transmission trains is provided with a movable ornament that is driven to rotate, and the intermediate gear is provided with a slip mechanism that slips when a load torque above a certain level is applied. A sensor for detecting the rotation angle of one gear in the train wheel to detect the rotation angle of the movable ornament is provided.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a mechanical body case 1 that rotationally drives a movable decoration is composed of a lower case 1a and an upper case 1b, which are each made of a synthetic resin molded product, and the upper and lower cases are the lower case 1a. The claw portion 1c provided on the outer peripheral portion is engaged with a locking portion (not shown) provided at several locations on the upper case 1b corresponding to the claw portion 1c so as to be integrally coupled. Drive motor 4 is lower case 1
It is attached by a screw to the recess formed in a.

In the machine body case 1, a drive train D including an intermediate gear 8 rotatably driven by a drive motor 4, and a transmission train that branches from the intermediate gear 8 into a plurality (two in this embodiment). T and are provided. The motor drive shaft 4a of the drive motor 4 projects into the case 1, and the motor drive shaft 4a
A motor pinion 4b made of a synthetic resin molded product is integrally rotatably attached to this. 2 for the motor pinion 4b
The gear portion 7a of the number gear 7 is meshed. The second gear 7 is
It is made of a synthetic resin molded product and has a pinion portion 7b that rotates integrally with the gear portion 7a.

The intermediate gear 8 is attached to the pinion portion 7b of the second gear 7.
The gear portion 8a of is meshed. The intermediate gear 8 has a pinion portion 8
b and the boss portion 8c (see FIG. 2) are made of a synthetic resin molded product, and the gear portion 8a is provided in the groove portion provided in the boss portion 8c.
Are mounted with a predetermined slip torque.
The drive wheel train D includes the motor pinions 4b and 2 of the drive motor 4.
It is composed of a number gear 7 and an intermediate gear 8.

The intermediate gear 8 has a slip mechanism S. That is, the gear portion 8a is a stamped product of a phosphor bronze plate, and two elastic arms 8b extending inward from the rim portion are provided.
The middle portion of 8b is formed in a semicircular shape corresponding to the shape of the groove portion formed in the boss portion 8c, and the inlet portion of the semicircular portion is formed to be slightly narrow so that the arm 8d, when attached to the groove portion,
8d is elastically deformed so that it can pass therethrough. When attaching the gear portion 8a to the boss portion 8c, the arms 8d, 8
When the opened end of d is pushed into the groove of the boss 8c, the arm elastically deforms so as to be expanded outward, and the boss enters the semicircular portion, and the elastic force of the two arms is increased. The boss is sandwiched between and supported so that it can be held. Therefore, when an excessively large load torque is applied to the transmission train wheel T, the boss portion 8c and the gear portion 8a of the intermediate gear 8 slip and the transmission train wheel T idles. Will not damage your teeth.

The pinion portion 8b of the intermediate gear 8 is meshed with the gear portions 9a, 9a of the two fourth gears 9, 9 provided on both the left and right sides by branching the train wheel in two directions. 4th gear 9
Like No. 2 gear 7, it is also made of a synthetic resin molding and has a pinion portion 9b that rotates integrally with the gear portion 9a.

The gear portions 6a of the rotary plate 6 are in mesh with the respective pinion portions 9b of the two fourth gears. The rotary plate 6 is made of a synthetic resin molded product, and the gear portion 6a of the rotary plate 6 is formed on the lower surface of the rotary plate 6. 4th gear 9 and rotating plate 6
Has shaft holes 9H and 6H at the center of rotation,
The shaft holes 9H and 6H are rotatably supported by shafts 1d and 1d formed integrally with the lower case 1a, respectively.

Each transmission train wheel T has a pinion portion 8b of the intermediate gear 8.
And the fourth gear 9 and the gear 6a of the rotary plate 6. On the upper surface of the rotary plate 6, a mounting portion 6c for a movable decoration is provided. The dolls 2 and 3 as an example of the movable ornament include two connecting portions 2b and 3b vertically provided on the bottoms of the rotating pedestals 2a and 3a.
Is attached to the rotary plate 6 via a connecting pin (not shown).
Is connected to. Therefore, the dolls 2 and 3 are erected so as to be operable integrally with the rotating plates 6 and 6.

In the present embodiment, the two rotary plates 6 and 6 are arranged symmetrically. That is, the two dolls 2 and 3 are rotationally driven by the rotation from one drive motor 4 via the drive train wheel D and each of the plurality of transmission train wheels T branched from the intermediate gear 8 into a plurality of branches. In this way the rotating plates 6, 6
Are rotationally driven by transmission train trains T that are branched in two directions from the pinion portion 8b of the intermediate gear 8, so that the rotary plate 6,
6 Mutual orientation does not collapse.

A ring-shaped guide groove 6d centering on the shaft hole 6H of the gear 6a is formed outside the mounting portion 6c of the rotary plate 6, and the outer diameter of the guide groove 6d is the gear. 6
It is formed to have substantially the same size as the outer diameter of a. Guide groove 6
On the outside of d, there are a semicircular disc portion 6b having a radius equal to that of the shaft hole 6H, and a disc portion 6b connected to the disc portion 6b. A semicircular detection plate 6e having a large radius is provided.

In the lower case 1a, the doll 2 is detected by detecting the rotation angle of a rotating plate 6 as an example of one gear in the transmission train wheel.
A sensor 10 for detecting the rotation angle of is provided. The outer peripheral connecting shape of the disc portion 6b and the detection plate 6e is formed in a step shape having a step portion 6f by a straight line toward the center of the shaft hole 6H, and the outer edge of the detection plate 6e corresponding to this step difference. The part is used by blocking or passing the light of the sensor 10. That is, the detection plate 6e is used as the sensor 10
Is an object to be detected for detecting the rotation angle of the rotating plate 6 to detect the rotation angle of the dolls 2, 3.

The sensor 10 has screw holes (not shown) formed in the lower case 1a in a state where a mounting hole 10h provided at one end of the mounting portion of the sensor 10 is inserted in a protrusion 1e formed in the lower case 1a. No.) is screwed immovably by a screw N penetrating a mounting hole (not shown) provided at the other end of the sensor mounting portion.

Here, an interrupter type sensor is adopted as the sensor 10. That is, the sensor 10 is formed in a U-shaped cross-section so that the phototransistor 10b provided in the lower portion facing the light-emitting body 10a (see FIG. 2) such as an LED provided in the upper portion receives light. Is configured. Light emitter 10a and phototransistor 10b
The light is blocked by the detection plate 6e entering between them.

The lead wire 10c of the sensor 10 is connected to a control circuit (not shown). The control circuit processes the detection result of light by the sensor 10, confirms the position of the detection plate 6e, and sends a signal to the drive motor 4. To control the driving and stopping of the drive motor 4. That is, the rotation angle of the rotary plate 6 is controlled by the sensor 10. In this embodiment, the sensor 10 is provided only on the right rotary plate side.

A locking projection 1h is provided on the inner surface of the lower case 1a. The locking projection 1h is provided on the inner surface of the gear 6a on the lower surface of the rotary plate 6 on the side where the sensor 10 is provided (right side). A locking portion 6g is provided so that it can be locked. The locking projection 1h and the locking portion 6g are locked with the dolls 2 and 3 facing the front, and the rotating plate 6 cannot be rotated in the clockwise direction.

When the dolls 2 and 3 are facing the front, the stepped portion 6 of the detection plate 6e is located at a position overrun by about 5 degrees from the detection range of the phototransistor 10b of the sensor 10.
f is located.

As shown in FIG. 2, two rotating plates 6 and 6 are provided.
Has an upper surface opened from the upper case 1b by the mounting holes 1f, 1f of the movable ornament formed in the upper case 1b, and the lower end of the wall 1g of the mounting hole 1f slides in the guide groove 6d. By movably engaging, the vertical movement of the rotary plate 6 is restricted.

Lower ends of the rotating pedestals 2a and 3a and the upper case 1
A slight gap is provided between the upper surface of the upper case 1b and the upper surface of the b, so that when viewed from the front, it looks as if it is placed on the upper case 1b.

The dolls 2, 3 can swing the arms 11, 11 by driving means (not shown) incorporated in the body, respectively, and the rotating plate 6 rotates 180 degrees, so that the dolls 2, 3 can be moved. When facing backwards, the player shakes his arms and acts like playing a musical score.

The driving means of the arm 11 is connected to the printed circuit board 12 provided at the bottom of the lower case 1a from the hole of the shaft portion 1d for supporting the rotary plate 6 through the rotary pedestals 2a and 3a from the body of the doll. Therefore, the operation can be controlled by the control circuit while being supplied with the drive current.

Next, the operation will be described. Each of the two dolls 2 and 3 normally faces the front and stands still with the arm 11 lowered. At this time, the detection plate 6e of the rotary plate 6
Is placed at a position away from the sensor 10. (See FIG. 1.) At the hour, a melody is played, the drive motor 4 is rotated by a signal from the control circuit, and the rotary plates 6, 6 are rotated counterclockwise via the drive wheel train D and the transmission wheel train T. Start rotating. Since the rotating plates 6 and 6 are operably connected to the dolls 2 and 3, respectively, the two dolls 2 and 3 also start to rotate, rotate 180 degrees, and face each other. Stop at position.

Here, the driving means in the torso portion of each doll 2, 3 is actuated to swing the arms 11, 11 to make it appear as if playing a musical instrument. When the operation of playing the musical instrument by the doll according to the melody is finished, the drive motor 4 is reversely rotated by the output signal from the control circuit, and the rotating plate 6 is rotated clockwise, so that the two dolls 2 and 3 are simultaneously clocked. Rotate in the direction.

Here, the regulation of the rotation angle will be described.
Immediately after the rotation plate 6 starts rotating, the detection plate 6e enters between the LED 10a and the phototransistor 10b of the sensor 10 to block light emission from the LED 10a to the phototransistor 10b, but a negative signal is sent to the control circuit. Then the rotation continues. Then, when the dolls 2 and 3 are rotated 180 degrees and just faced backward, the stepped portion 6 of the detection plate 6e is
f becomes a position away from the sensor 10, and the light emitted from the LED 10a can be received by the phototransistor 10b. Therefore, a positive signal is sent from the sensor 10 to the control circuit, and the drive motor 4 stops upon receiving the output signal from the control circuit. That is, since the sensor for detecting the rotation of the rotary plate is provided in the case, the rotation of the rotary plate can be restricted within a predetermined range.

At this stage, the dolls 2 and 3 perform the motions of waving their arms and playing a musical score. When the motion of shaking the arm is completed, an output signal for rotating the motor 4 in the opposite direction to the above is sent from the control circuit. When the output signal for rotating in the opposite direction is obtained, the motor 4 rotates in the reverse direction, and the detection plate 6e causes the sensor 1 to rotate.
The light from the LED 10a to the phototransistor 10b is blocked by entering between the LED 10a of 0 and the phototransistor 10b, but a negative signal is sent to the control circuit and the rotation is continued.

Eventually, the stepped portion 6f of the detection plate 6e becomes the sensor 1
It will be a position deviating from 0. At this position, a positive signal is sent from the sensor 10 to the control circuit, and the motor 4 stops in response to the output signal from the control circuit. However, the sensor 10
The motor 4 rotates slightly after the positive signal from the control circuit enters the control circuit until the motor 4 stops.
Keeps spinning. Eventually, the detection plate 6e is stopped by the engagement portion 6g engaging with the engagement protrusion 1h of the lower case 1a. The position where the locking portion 6g and the locking projection 1h are locked is a position where the dolls 2 and 3 face the front. In this way, even if an inertial force or the like acts such that the direction of the doll goes too far from the front, the locking portion 6g and the locking projection 1h are locked, so that the dolls 2 and 3 may go beyond the position facing the front. However, when the dolls 2 and 3 are stopped at times other than the hour, they always face the right direction.

FIG. 3 shows a wall clock using the driving device of the mechanism of the present invention for a wall clock. The clock frame 14 is provided with an edge portion 14a having a predetermined width, and the dial portion 1 is provided inside thereof.
5 and a driving device 16 of the karakuri device are provided. An hour hand 18 is attached to a pointer shaft 17 provided at the center of the dial portion 15.
And a minute hand 19 is provided.

The driving device 16 of the karakuri device has a large number of plate-like carion bells 20 provided at the back of the arch-shaped stage, and two dolls 2 and 3 according to the present invention rotate at the center of the stage. It stands on the pedestals 2a and 3a. Each of the two dolls 2 and 3 normally faces the front and stands still with the arm 11 lowered. In the vicinity of one of the arches on both front sides of the stage and above the dial part, there are kid dolls 21 ... Playing accordion, whistle, trumpet, etc., to enhance the fun of the Karakuri device.

In this embodiment, the number of movable decorations is two, but this number may be three. In this case, the transmission train wheel may be branched into three and three rotary plates may be rotatably connected to each.

Although the two dolls are made to rotate in the same direction, they can be made to rotate in different directions by interposing an idler gear between one of the branched transmission trains.

The sensor detects the rotation angle of the rotary plate to detect the rotation angle of the rotary decoration, but the sensor directly detects the rotation angle of the rotary decoration. Any gear can be used.

Further, the detection plate is not always necessary, and instead of the detection plate, the disc portion of the rotary plate is formed to have a large diameter,
A through hole may be formed in the disc portion at a predetermined position where light emitted from a light emitting body such as an LED can be received by a phototransistor provided in the lower portion facing the disc portion.

[0038]

As described above, according to the present invention, since a plurality of movable ornaments can be rotated by a single drive motor, the number of parts and the number of assembling steps can be reduced, thereby contributing to cost reduction. Since the transmission train wheel is branched into a plurality of parts from the intermediate gear, a plurality of rotary plates can be simultaneously driven to rotate, and the balance of orientation among the plurality of movable ornaments is not lost. Also, since the intermediate gear has a slip mechanism, when an excessive load torque above a certain level is applied to the transmission gear train, the boss and gear parts of the intermediate gear slip and the transmission gear train spins idle. Does not damage the gear teeth in the train. Further, since the sensor for detecting the rotation angle of one gear in the transmission train wheel to detect the rotation angle of the movable decoration is provided in the case, the rotation angle of the movable decoration can be easily controlled.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which an upper case is removed.

FIG. 2 is a partially cutaway cross-sectional view showing a state inside a drive device to which a movable decoration is attached.

FIG. 3 is a front view of a timepiece provided with a drive device for the mechanical device of the present invention.

[Explanation of symbols]

 1 Machine Case 2, 3 Movable Decoration (Doll) 4 Drive Motor 6 One Gear (Rotating Plate) in Transmission Train 8 Intermediate Gear 10 Sensor S Slip Mechanism T Transmission Train

Claims (1)

[Claims] 1. A drive motor is attached to a mechanical case that rotationally drives a movable ornament, and an intermediate gear that is rotationally driven by the drive motor and a plurality of intermediate gears are provided in the mechanical case. A plurality of branching transmission trains are provided, the movable decorations that are rotatably driven by the respective transmission trains are respectively provided on the mechanical body case, and the intermediate gears have a certain size or more. A slip mechanism that slips when a load torque is applied is provided, and a sensor that detects the rotation angle of one gear in the transmission train wheel to detect the rotation angle of the movable ornament is provided in the case. A drive device for a Karakuri device, which is characterized by being provided.