JP2001281360A - Movement for timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a timepiece movement for capable of efficiently providing a motor and a reduction gear mechanism. SOLUTION: This movement of timepiece for driving pointers 210, 220 and 230 of a timepiece 1 is provided with a motor 310, and a reduction gear mechanism 320 consisting of a gear train interposed between the motor and the pointers. At least one gear 323 in the gear train of the reduction gear mechanism comprises a first support member 330 for supporting one shaft part of the gear and a second support member 340 for supporting the other shaft part of the gear. After the gear is set to the first member, the second support member is assembled. The first support member is provided with a projection 331, and the falling of the projection is prevented by the projection in the set of the gear to the first support member. The stator 311 of the motor is supported by the first support member and comprises a hole part 311b for passing the projection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timepiece movement for driving a timepiece hand.

[0002]

2. Description of the Related Art Generally, a watch movement for driving the hands of a watch is provided with a motor and a speed reduction mechanism connected to the motor.

[0003] The speed reduction mechanism comprises a gear train interposed between a motor and a pointer.
With the rotation of the rotor, each is rotated at a predetermined speed.

[0004] As a clock for driving the hands, there are a continuous drive type for continuously driving the hands and a step type for intermittently driving the hands by a step motor or the like.

[0005]

By the way, the above-mentioned movement for a timepiece is realized by using a conveying means such as a conveyor.
It is manufactured by assembling each part sequentially.
An automatic assembling apparatus or the like is used for assembling the parts.

However, in the production of such a timepiece movement, the gears of the speed reduction mechanism set at a predetermined position often fall down due to vibration, impact or the like caused by conveyance. This makes it difficult to assemble a series of parts.

Further, it is necessary to provide a motor accurately for such a speed reduction mechanism.

[0008] In view of such circumstances, an object of the present invention is to provide a timepiece movement in which a motor and a speed reduction mechanism can be efficiently provided.

[0009]

According to the first aspect of the present invention, a timepiece hand is driven, and a speed reduction mechanism comprising a motor and a gear train interposed between the motor and the hand. In the timepiece movement comprising: a first support member that supports one shaft of the gear and at least one gear in the gear train of the reduction mechanism, and a shaft that supports the other shaft of the gear; A second support member, wherein the gear is set on the first support member, and then the second support member is assembled, and the first support member is provided with a projection, and When the gear is set on the first support member, the protrusion prevents the gear from tipping over, and the stator of the motor is supported by the first support member and has a hole that penetrates the protrusion. Movement for , And the According to this structure, the motor and the reduction mechanism is provided efficiently.

That is, in the manufacture of a timepiece movement, it has been remarkable in the past that a set gear may fall down with a certain beat, but in the present invention, a projection provided on the first support member is provided with a gear. Such an inconvenience is avoided because the fall of the vehicle is prevented.

The positioning of the stator with respect to the first member is performed by a projection. Therefore, the speed reduction mechanism is efficiently provided, and the stator of the motor is accurately provided.

In particular, by disposing the gears near the motor, the timepiece movement can be further miniaturized.

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view showing a timepiece, FIGS. 2 and 3 are rear views showing the inside of the timepiece, FIG. 4 is a front view showing a motor, a speed reduction mechanism, and a middle plate, and FIG. 6 is a perspective view showing a stator and a middle plate of the motor, and FIG. 7 is a side sectional view showing a stator, a gear, a middle plate, and a dust cover of the motor.

The timepiece 1 shown in these figures has a dial 200
Hour hand 210, minute hand 220, and second hand 23 arranged above
0 and a clock movement 300 for driving the hands 210, 220, and 230, respectively, and an alarm clock that sounds the bell 400 by the alarm motor 500 at a preset time.

The alarm sound is stopped by pressing a switch 600 provided on the top of the timepiece 1.

Further, the power supply of the timepiece movement 300 and the alarm motor 500 is configured to be obtained from a battery stored in the battery storage section 700 via a circuit board 800.

The timepiece movement 300 of this embodiment includes a motor 310 including a stator 311 and a rotor 312;
A speed reduction mechanism 320 including a motor 310 and a gear train interposed between the hands 210, 220, and 230 is provided to drive each of the hands 210, 220, and 230 at a predetermined speed.

The stator 311 of the motor includes a coil 311
The rotor 312 is provided with a magnet for generating torque.

The gear train of the speed reduction mechanism 320 includes a rotor 312
Starting with the 7th wheel 321 meshing with the 6th wheel 322,
5th wheel 323, second hand wheel 324, 3rd wheel 325, minute hand wheel 3
26, a minute wheel 327, and an hour wheel 328.

Of these gears, for a seventh wheel & pinion 321, a sixth & sixth wheel 322 and a fifth wheel & pinion 323, one shaft is pivotally supported by a middle plate 330 serving as a first support member, and the other is supported by the other. The shaft portion is a dust cover 340 serving as a second support member.
I support it. Each of the middle plate 330 and the dust cover 340 has a bearing portion including a hole and a boss.
The shaft of each gear is supported by these bearings.

The middle plate 330 is a member supported at the center rear of the dial 200, and the dust cover 340 is provided so as to cover the motor 310, the speed reduction mechanism 320, and the middle plate 330.

The stator 311 of the motor 310 is fixed to the middle plate 330, and the rotor 312 is rotatably mounted on the middle plate 330.

The base 610 of the switch 600 is provided so as to reciprocate with respect to the dust cover 700.

In the manufacture of the movement 300 for a timepiece, the seventh wheel & pinion 321, the sixth wheel & pinion 322 and the fifth wheel & pinion 323 are set on the middle plate 330 and then provided with a dust cover 340.

A protrusion 331 is provided at an important part of the middle plate 330. When the seventh wheel & pinion 321, the sixth wheel & pinion 322 and the fifth wheel & pinion 323 are set on the middle plate 330, the protrusion 331 is provided.
This prevents the fifth wheel & pinion 323 from overturning.

The projection 331 is provided so that the fifth wheel & pinion 323 is inclined and the tip of the projection 331 contacts the fifth & fifth wheel & pinion 323.

The direction in which the fifth wheel & pinion 323 tilts also affects the position where the fifth wheel & pinion 322 and the fourth & fourth wheel 324 mesh with each other. Therefore, the position of the projection 331 is set in consideration of such conditions. .

However, when setting the fifth wheel 323
Is always supported at three points by a shaft portion inserted into the bearing portion of the middle plate 330 and any two of the sixth wheel & pinion 322, the fourth wheel & pinion 324, and the projection 331.

When the dust cover 340 is attached, the fifth wheel & pinion 323 is supported upright on both shaft portions, and stands upright.
There is no contact with the projection 331.

In particular, since the fifth wheel & pinion 323 is set so as to be stacked on the middle plate 330 above the other gears, it is very easy to fall down. By providing the above, such 5
The shift wheel 323 is configured to prevent falling.

Each bearing of the dust cover 340 is provided with a taper for guiding the shaft of each gear. According to such a taper, temporarily, the fifth wheel 32
Even if 3 is inclined and abuts on the projection 331,
The dust cover 340 can be easily assembled.

Further, the stator 311 of the motor 310
A hole 311b that supports the middle plate 330 and penetrates the projection 331 is provided. Therefore, the stator 3
11 can be positioned with respect to the middle plate 330 by the protrusion 331, and can be provided more accurately.

The middle plate 330 is provided with another protrusion 332 in addition to the protrusion 331 for supporting the fifth wheel & pinion 323, and the stator 311 is provided with a hole 311c passing through the protrusion 332. I have. That is, the positioning of the stator 311 is determined by such other protrusions 332 and the holes 311c.
It is also done by

As described above, according to the timepiece movement of this embodiment, at least one gear in the gear train of the speed reduction mechanism supports the first shaft of one of the gears.
A support member, and a second support member that supports the other shaft portion of the gear, wherein the gear is set on the first support member, and then the second support member is assembled. Is provided with a projection, and when the gear is set on the first support member, the projection prevents the gear from overturning.
Since it is supported by the support member and has a hole penetrating the projection, the motor and the speed reduction mechanism can be efficiently provided.

That is, in the manufacture of a timepiece movement, it has been remarkable in the past that the set gear may fall down with a certain beat, but in this embodiment, the projection provided on the first support member is provided with a gear. Since such an inconvenience is prevented, such inconvenience can be avoided.

The positioning of the stator with respect to the first member can be performed by a projection. Therefore, the speed reduction mechanism can be efficiently provided, and the stator of the motor can be accurately provided.

In particular, by disposing the gear near the motor, the timepiece movement can be further reduced in size.

[0038]

According to the first aspect of the present invention, a timepiece hand is driven, and comprises a motor and a speed reduction mechanism comprising a gear train interposed between the motor and the hand. In a timepiece movement, for at least one gear in a gear train of the reduction mechanism, a first support member that supports one shaft of the gear and a second support member that supports the other shaft of the gear. The gear is set on the first support member, and then the second support member is assembled. Further, the first support member is provided with a projection, and the gear is connected to the first support member. When set in a timepiece movement, the projections prevent the gear from tipping over, and the stator of the motor is supported by the first support member and is provided with a hole passing through the projection. ,this According to Una configuration it can be provided efficiently motor and the reduction mechanism.

[Brief description of the drawings]

FIG. 1 is a front view showing a timepiece according to a specific example of the present invention.

FIG. 2 is a rear view showing the inside of the timepiece according to a specific example of the present invention.

FIG. 3 is a rear view showing the inside of the timepiece according to a specific example of the present invention.

FIG. 4 relates to a motor, a speed reduction mechanism,
It is a front view which shows a middle plate.

FIG. 5 is a front view showing a motor and a middle plate according to a specific example of the present invention.

FIG. 6 is a perspective view showing a stator and a middle plate of a motor according to a specific example of the present invention.

FIG. 7 shows a stator of a motor according to an embodiment of the present invention;
It is a side sectional view showing a gear, a middle board, and a dust cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Watch 200 dial 210 hour hand 220 minute hand 230 second hand 300 watch movement 310 motor 311 stator 311a coil 311b hole 311c hole 312 rotor 320 reduction mechanism 321 seventh wheel 322 sixth wheel 323 fifth wheel 324 second wheel 325 second wheel 325 second wheel 325 second wheel Car 326 minute hand wheel 327 day wheel wheel 328 hour hand wheel 330 middle plate (first support member) 331 protrusion 332 protrusion 340 dust cover (second support member) 400 bell 500 alarm motor 600 switch 610 base 700 battery compartment 800 circuit board

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Kabe 1-2-1, Kinshi, Sumida-ku, Tokyo Rhythm Watch Industry Co., Ltd. (72) Inventor Shigeru Fukuoka 1-2-1, Kinshi, Sumida-ku, Tokyo Rhythm Watch Industry Co., Ltd. F-term (reference) 2F001 AA03 AG01 AG02 AG03 AG06 AG07 AG12

Claims (1)

[Claims] 1. A timepiece movement for driving a timepiece hand, comprising a motor and a speed reduction mechanism consisting of a gear train interposed between the motor and the hands, wherein the gear train of the speed reduction mechanism is provided. Wherein at least one of the gears includes a first support member that supports one shaft of the gear, and a second support member that supports the other shaft of the gear. After setting on the support member, the second support member is assembled. Further, the first support member is provided with a projection, and when setting the gear on the first support member, the gear is provided by the projection. 2. The timepiece movement according to claim 1, wherein the motor has a stator supported by the first support member and having a hole penetrating the protrusion. 3.