JP2784393B2 - Clock with movable decoration - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timepiece with a movable decoration which can provide a user with unexpectedness and fun by incorporating movement into a time display.

[0002]

2. Description of the Related Art Conventionally, a mechanical timepiece is well known as a timepiece incorporating movement. For example, at the hour, doors open and dolls and the like come out and dance or play music. However, these full-fledged mechanical watches are generally complicated and expensive.

On the other hand, as a mechanical timepiece which is simple in construction and can be provided at low cost, Japanese Utility Model Laid-Open No. 5-149980 by the present applicant has disclosed a mechanical timepiece.
No. "Clock with movable decoration". This watch with a movable decoration is designed to make the time index (time number), which should normally be fixed, suddenly start at the hour or at an arbitrarily set time. It is to give it. In this timepiece, twelve rotary decorations representing time numbers are provided rotatably on the front side of the dial as an example of a time index, and a gear driving these rotary decorations is a single gear on the back side of the dial. The gears are engaged with each other so as to form a row, and one of the gears in the gear row is rotationally driven by a driving means such as a motor. Was.

[0004]

Problems to be Solved by the Invention
According to the configuration of (1), the gears for driving the rotary decorations for interlocking rotation of the rotary decorations mesh with each other so as to form one gear train. However, since there is considerable backlash between the gears, the backlash sometimes causes an unnatural movement in the rotational movement of each rotary ornament.

[0005] An object of the present invention is to provide a surprising movable decoration in which a time index (time number), which should normally be fixed, suddenly starts at the hour or at an arbitrarily set time. In providing a timepiece, it is an object of the present invention to provide smooth movement of a rotating ornament with a simple structure.

[0006]

Means for Solving the Problems To achieve the above object, a timepiece with a movable decoration according to the present invention is configured as follows. That is, on the front side of the dial, a plurality of rotating decorative plates provided with a time index are rotatably disposed,
On the back side of the dial, there is provided a ring gear having external teeth and internal teeth, and a decoration driving movement for rotating this ring gear at an hour or at an arbitrarily set time,
The gear driving each of the rotary decorative plates corresponding to the even-numbered time positions is one of the external teeth and the internal teeth of the ring gear, and the gear driving each of the rotary decorative plates corresponding to the odd-numbered time positions is the external teeth of the ring gear. And the other of the internal teeth.

[0007]

[Action] The ring drive gear is rotated by the movement of the decoration drive at the normal time or at an arbitrary time, and the rotation drive gear meshing with the inner teeth and the outer teeth of the ring gear rotates. I do. At this time, the gear meshing with the external teeth of the ring gear and the gear meshing with the internal teeth,
In other words, the rotary plaque corresponding to the even-numbered time position and the rotary plaque corresponding to the odd-numbered time position are driven to rotate relatively in opposite directions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to a preferred embodiment shown in the accompanying drawings. As shown in FIG. 1, a circular dial 2 is placed inside a watch frame 1 made of plastic or the like.
Is provided. As shown in FIG. 3, a well-known timepiece mechanical body 3 is attached to the back of the dial 2. A pointer shaft 4 protruding from the center of the watch body 3 penetrates the dial 2,
Two hands 5 (minute hand and hour hand) are attached to the protruding end. The timepiece body 3 has a built-in hour detector (not shown).

On the front side of the dial 2, as shown in FIG. 1, a rotary decorative plate corresponding to an even-numbered time position, that is, a rotary decorative plate 6a in which even-numbered time numerals are formed, and an odd-numbered time position. A total of 12 rotary decorative plates, that is, six rotary decorative plates 6b on which odd time numbers are formed, are provided.
Are provided. The rotary decorative plates 6a and 6b are formed in the shape of gears, and time numerals 1 to 12 are formed on the front surfaces thereof by an appropriate method such as printing. Then, the rotating decorative plate 6a on which even-numbered time numerals are formed.
Is provided closer to the inner periphery of the dial 2 than the rotary decorative plate 6b on which odd numbers are formed.

As shown in FIGS. 2 and 3, a screw hole 7 for fixing the dial 2 to the frame 1 of the timepiece is provided on the outer peripheral edge of the dial 2. A hole 8 for passing the pointer shaft 4 is provided at the center of the dial 2. On the back side of the dial 2, a circular support plate 9 is provided at a predetermined interval from the dial 2. The support plate 9 is a dial 2
Positioning is performed by a positioning projection 10 provided in a ring shape slightly inside the outer periphery of the shaft, and a shaft 11 provided inside the positioning projection 10 and a connecting column 12 provided on the outer periphery of the support plate 9 are engaged. It is fixed to the dial 2 by fitting. A hole 12 for disposing the timepiece mechanical body 3 is provided in the center of the support plate 9.

On the rear side of the dial 2, a ring gear 18 having internal teeth 18a and external teeth 18b is provided. The ring gear 18 is rotatably supported by a plurality (three in this embodiment) of rollers 19 rotatably supported by the dial 2 and the support plate 9. The ring gear 18 has a cross-sectional shape similar to a torii gate, and has internal teeth 18a and external teeth 18b at portions corresponding to the legs of the torii gate. The internal gear 18a of the ring gear 18 has a gear 13
a has gears 13b, 1 on external teeth 18b of the ring gear 18.
3c are engaged with each other. The gear 13a meshing with the internal teeth 18a of the ring gear 18 and the gears 13b and 13c meshing with the internal teeth 18b of the ring gear 18 form the rotating decorative plate 6a on which even-numbered time numbers are formed and odd-numbered time figures respectively. This is for driving the rotating decorative plate 6b. Therefore, the gears 13a, 13b, 13
Each of the shafts c is integrally provided with a shaft portion 14. The shaft portion 14 penetrates the dial 2 toward the front side, and the rotating decorative plates 6a and 6b are fixed to the protruding ends thereof by press-fitting.

One of the gears meshing with the ring gear 18 (in this embodiment, the gear 13 corresponding to the 7 o'clock time index)
c) is press-fitted and fixed to an output shaft 17 that penetrates through the support plate 9 and protrudes to the front from a decoration driving movement 16 provided on the back surface of the support plate 9. The remaining eleven gears 13a and 13b are supported by support shafts 15 provided on the support plate 9.
It is rotatably supported by. The movement 16 for decoration drive is configured to operate for a fixed time in response to an hour signal output from the timepiece mechanical body 3.

With such a structure, for example, 1
At 2 o'clock, the hour detection device built into the watch mechanical body 3 is activated to play a melody or other alarm sound,
The decoration driving movement 16 is activated by the hour signal, and the gear 1 at the 7 o'clock position, which is press-fitted into the output shaft 17.
3c is rotated. For this reason, the ring gear 18 with which the gear 13c meshes rotates, and the inner teeth 1 of the ring gear 18 are rotated.
The remaining eleven gears 13a, 13b meshing with the outer teeth 8a and the outer teeth 18b rotate in opposite directions. Thus, the rotary decorative plate 6a corresponding to the even-numbered time position and the rotary decorative plate 6b corresponding to the odd-numbered time position are driven to rotate relatively in opposite directions.

At this time, the gears 13a and 13b for driving the rotary decorative plate 6a corresponding to the even-numbered time position and the rotary decorative plate 6b corresponding to the odd-numbered time position are respectively inner teeth 18a and outer teeth 18b of the ring gear 18. And the gears 13a and 13b are directly driven by the movement 16 as compared with the conventional gears which are configured to rotate in an interlocked manner with one gear train. It rotates smoothly without play at the same timing as the gear 13c.

When a certain period of time has passed since the detection of the hour, the movement 16 for decoration drive is moved to each of the rotary decoration plates 6.
The operation is stopped so as to stop at the position where all the time numerals a and 6b can be read normally, and the one-time mechanism operation is completed.

In the above embodiment, the decorative drive mud is used.
Although the gear 13c for driving the ring gear 18 via the bracket 16 shares the gear corresponding to the time position for driving the rotary plaque, the gear 13c is used for the time position for driving the rotary plaque. A gear that meshes with the ring gear 18 may be provided separately from the corresponding gear, and the ring gear 18 may be driven such that the gear is driven by the decoration driving movement 16.

Further, in the above embodiment, the mechanism is operated at an hour, but the mechanism may be operated at a predetermined or programmed appropriate time.

Further, in the above embodiment, each gear 13a, 1
3b is the same size, but the gear ratio corresponding to the even-numbered time position and the gear corresponding to the odd-numbered time position is 2: 1.
For example, the rotating decorative plate 6a corresponding to the even-numbered time position and the rotating decorative plate 6b corresponding to the odd-numbered time position may operate at different rotation ratios. The positions of the rotary decorative plates 6a and 6b are not limited to the embodiment, and the positional relationship between the even-numbered side and the odd-numbered side may be reversed. Further, the rotating decorative plates 6a, 6
The time index provided for b may be a bar-shaped scale instead of the time numeral.

[0019]

According to the structure of the present invention, the time index (time number), which should normally be fixed, suddenly starts at the hour or at an arbitrarily set time. In providing a clock with a movable decoration, gears for driving the rotation decoration plate corresponding to the even-numbered time position and the rotation decoration plate corresponding to the odd-numbered time position are directly meshed with the internal teeth and the external teeth of the ring gear. Therefore, the effect of backlash does not accumulate as compared with a conventional gear train that rotates in a single gear train, so that all rotating decorative plates operate smoothly without rattling. . In addition, since the configuration is simple, the assembling is easy, and a mechanism watch can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the present invention.

FIG. 2 is a rear view taken along a line BB in FIG. 3;

FIG. 3 is a developed cross-sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

2 Dial plate 6a Rotating plaque at even time position 6b Rotating plaque at odd time position 13a Gears for driving rotary plaque at even time position 13b, 13c Gears for driving rotary plaque at odd time position 16 Decorative drive movement 18 Ring gear 18a Internal teeth 18b External teeth

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G04B 45/00 G04B 19/10

Claims (1)

(57) [Claims] 1. A plurality of rotating decorative plates provided with a time indicator are rotatably disposed on a front side of a dial, and external teeth and internal teeth are provided on a rear side of the dial. And a decoration driving movement for rotating the ring gear at an hour or at an arbitrarily set time. The gears for driving each of the rotary decoration plates corresponding to even-numbered time positions are provided. A gear driving one of the external teeth and the internal teeth, and each of the rotary decorative plates corresponding to the odd-numbered time positions is meshed with the other of the external teeth and the internal teeth. Clock with movable decoration.