JPH06222161A - Dial switching timepiece - Google Patents

Abstract

PURPOSE:To provide a dial switching timepiece in which a drive mechanism for movable dials is miniaturized and an opening with a large open area can be disposed in the center of a dial. CONSTITUTION:A dial switching timepiece is provided with a timepiece frame 1; a fixed dial 2 having an opening 2a in its center; two movable dials 3, 4 rectilinearly movable in opposite directions between a closing position in which they close the opening with their opposite surfaces abutting each other at the center position of the opening 2a and an opening position in which they open the opening; guide mechanisms provided at both end portions of each movable dial so that each movable dial is rectilinearly movably guided and supported; and movable ornaments 12, 13, 14 which, when both of the movable dials open the opening, appear in the opening to make a series of motions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dial opening / closing type timepiece.

[0002]

2. Description of the Related Art Conventionally, a dial opens at a predetermined time (for example, on the hour), and a movable ornament such as a doll appears along with the melody of a music box in the opened portion, and after this movable ornament performs a series of operations. There is known a dial opening / closing timepiece configured to close a dial.

As such a conventional dial opening / closing type timepiece, for example, a semicircular shaped two piece that is rotatably supported by a support shaft provided near the outer peripheral portion of the timepiece frame and forms the entire surface of the dial. It is known that there is a movable dial plate, and a movable decoration appears when the movable dial plates are rotated outward from a closed position about a support shaft to open ( JP-A-2-157683, JP-A-3-131794
issue).

As another conventional technique, for example, two semi-circular movable dials which are rotatably supported at the center of the dial (on the pointer shaft) and form the entire surface of the dial. It is known that the movable dial has an opening formed near the outer periphery of the dial, and the movable dials rotate in opposite directions to open and close the opening. (JP-A-3-99390).

[0005]

In the former prior art described above, (1) the two movable semicircular dials forming the entire surface of the dial are centered on a support shaft near the outer periphery of the timepiece frame. Since it has to be rotated to, the driving mechanism for driving both movable dials becomes complicated and becomes large in size, and
(2) When both movable dials are pivoted outward from the closed position around the support shaft and opened, both movable dials largely protrude to the outside of the clock frame, so when the clock is hung on the wall surface, There is a problem that the movable dial needs to have a large space so as not to hit an obstacle around the timepiece.

In the latter prior art, the support mechanism for rotatably supporting the two semicircular movable dial plates and the drive mechanism for driving both movable plates are arranged at the center of the dial plate. It is necessary to increase the opening area of the opening because it is not possible to provide the opening for allowing the movable decoration to appear in the center of the dial because it is necessary. There was a problem that I could not do it.

The present invention has been made by paying attention to such a conventional problem, and aims at downsizing of a drive mechanism of a movable dial plate, and an opening portion having a large opening area is provided at a central portion of the dial plate. The purpose of the present invention is to provide a dial opening / closing timepiece that can be arranged.

[0008]

In order to achieve the above object, a dial opening / closing type timepiece according to the present invention comprises a timepiece frame and a fixed dial plate having an opening at the center and integrated with the timepiece frame. , Between the closed position where the facing surfaces abut each other at the center position of the opening to close the opening and the open position where the opening is opened,
Two movable dials that are linearly movable in opposite directions, a guide mechanism that is provided at both ends of the movable dials, and that guides and supports the movable dials so as to be linearly movable, and the movables. A drive mechanism for driving the dial and a movable decoration that appears in the opening when both movable dials open the opening and performs a series of operations.

Preferably, the drive mechanism includes a motor,
A pair of pulleys each having a cam pin rotated by the motor, and a connecting portion having an engaging portion integrally formed on each of the movable dial plates and having a corresponding cam pin slidably engaged, Each of the engaging portions has a cam surface extending in a direction substantially orthogonal to the moving direction of the movable dial, and each connecting portion is provided with a spring for pressing the cam pin against the cam surface. ing.

More preferably, the cam surface of each of the engaging portions is formed into a curved surface whose central portion projects toward the spring.

[0011]

With the structure having the fixed dial having an opening in the center and the two movable dials for opening and closing the opening, the drive mechanism has only two movable dials forming a part of the dial. Just drive. Further, in this timepiece, since the two movable dials linearly move in opposite directions to open and close the opening in the center of the fixed dial, both movable dials do not project outside the timepiece frame. . Further, since the guide mechanism for linearly moving and supporting both movable dials is provided at both ends of both movable dials, a space for the opening is secured in the central portion of the dial.

Further, the cam pin of each pulley, which moves circularly with the rotation of each pulley, slides on the cam surface of the corresponding movable dial plate while being pressed by the spring while sliding on the cam surface. Since the rotational motion of is converted to a linear motion and transmitted to each movable dial, variations due to manufacturing errors in the shape of parts such as cam pins and cam surfaces are absorbed, and each cam pin does not leave the corresponding cam surface. Slide.

Furthermore, since the cam surface of each engaging portion is formed into a curved surface whose central portion projects toward the spring,
When the cam pin of each pulley slides on the cam surface while being pressed by the cam surface of each corresponding engaging portion by the spring, the pressing force of the spring acting on the cam pin increases as the cam pin moves to both sides of the cam surface. Does not get stronger.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A dial opening / closing timepiece according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a dial opening / closing timepiece according to an embodiment of the present invention.

As shown in FIGS. 1 and 3, the dial opening / closing type timepiece has a timepiece frame 1 and a rectangular opening 2a which is long in the lateral direction in the center, and a fixed dial 2 which is integral with the timepiece frame 1. And two movable dial plates 3 and 4 for opening and closing the opening 2a. Further, in FIG. 1, reference numeral 5 is a minute hand whose base end is fixed to a minute hand shaft 6, and reference numeral 7 is an hour hand whose base end is fixed to an hour hand shaft 8.

The fixed dial 2 is, as shown in FIG.
It is molded separately from the timepiece frame 1 and is fixed to and integrated with the timepiece frame 1. Fixed dial 2
It may be formed integrally with the timepiece frame 1. A transparent cover 9 (see FIG. 3) is fixed to the timepiece frame 1.

The movable dial plates 3 and 4 form a dial plate together with the fixed dial plate 2 with the opening 2a closed as shown in FIG. On the fixed dial 2 and the movable dial 3,
A time numeral 10 is formed on each of the four by printing. The movable dial plates 3 and 4 face each other at the position of the horizontal line 11 (the center position of the opening 2a) passing through the axis (center of the dial) of the minute hand shaft 6 and the hour hand shaft 8 so that the facing surfaces abut each other. It is possible to move linearly between the closed position (the position in FIG. 1) that closes the portion 2a and the open position that opens the opening 2a, in opposite directions and in the up-down direction in FIG.

As shown in FIG. 2, when the movable dials 3 and 4 open the opening 2a, a rotating ornament (movable ornament) 12 is provided at the center of the opening 2a and movable dolls (movable ornaments) are provided on both sides thereof. ) 13 and 14 appear.

As shown in FIGS. 1 and 3, the rotary ornament 12 has the minute hand shaft 6 and the hour hand shaft 8 on the central support plate 15a of the support plate 15 fixed to the timepiece frame 1 and the fixed dial 2. It is rotatably arranged around the axis of. A gear 12a is integrally formed on the lower surface of the rotary ornament 12. The movable doll 13 is arranged in the right side storage recess 15b of the support plate 15, and the movable doll 14 is arranged in the left side storage recess 15c of the support plate 15 (see FIG. 2).

The dial opening / closing type watch is the rotary ornament 1
2 and the drive mechanism that drives the movable dolls 13 and 14 (hereinafter,
The first drive mechanism) 16.

The first drive mechanism 16 has a motor 17 that rotates in one direction, a first train wheel that transmits the rotation of the motor 17 to the handle 14a of the movable doll 14, and the rotation of the first handle 13a of the movable doll 13. And a third train wheel for transmitting the rotation to the gear 12a of the rotary ornament 12.

The first train wheel has a gear 18 meshed with a motor pinion 17a and a pinion 18a integral with the gear 18.
The gear 19 meshes with the gear 19, and the gear 20 meshes with the gear 19 and is integral with the handle 14a of the movable doll 14.
The second train wheel includes a gear wheel 21 meshing with the gear wheel 18,
Gear 22 meshed with pinion 21a integrated with gear 21
And the gear 22 meshes with the handle 1 of the movable doll 13.
3a and a gear 23 integral therewith. The third train wheel includes a gear 24 meshed with the pinion 21a and a gear 25 meshed with the gear 24 and the gear 12a of the rotary ornament 12.
Consists of.

When the motor 17 of the first drive mechanism 16 rotates, this rotation is transmitted to the rotary decoration 12 and the handles 13a and 14a via the respective train wheels so that they are simultaneously rotated in the directions of the arrows in FIG. It has become. And
When the handles 13a, 14a rotate, the movable doll 13,
The upper half of 14 is swingable by a link mechanism with the waist as a fulcrum.

In this way, while the motor 17 of the first drive mechanism 16 rotates in one direction, the rotary ornament 12 continues to rotate and the movable dolls 13 and 14 repeat a series of operations. There is.

The dial opening / closing type timepiece is further provided with a drive mechanism (hereinafter referred to as a second drive mechanism) 30 for driving the movable dials 3 and 4, and both sides of the movable dials 3 and 4. , And guide mechanisms 40 and 41 that linearly move and support both dials (see FIG. 4).

The second drive mechanism 30 is a motor 31 that rotates in one direction, and a pair of pulleys 32 and 3 that are rotated by this motor and have cam pins 32a and 33a, respectively.
3 and both movable dial plates 3 and 4 are integrally formed,
Corresponding cam pins 32a and 33a have connecting portions 3A and 4A having guide holes (engaging portions) 3a and 4a with which they are slidably engaged.

As shown in FIGS. 3 and 4, the pulley 3
2, 33 are rotatably supported on the support plate 15. The pulley 32 is located above the movable dial 3 and
Are arranged below the movable dial 4, respectively. A timing belt 34 is wound around the pulleys 32 and 33. A gear 32 a is integrally formed on the lower surface of the pulley 32.

Rotation of the motor 31 in one direction is performed via a motor pinion 31a, a gear 35 meshing with the pinion 31a, a pinion 35a integral with the gear 35, and a gear 32b of a pulley 32 meshing with the pinion 35a. In addition to being transmitted to the pulley 32, it is also transmitted to the pulley 33 via the timing belt 34, whereby the pulleys 32 and 33 are synchronously rotated in the directions of the arrows in FIG.

Guide holes 3a of the connecting portions 3A, 4A,
As shown in FIG. 4, 4a is a hole that is substantially orthogonal to the moving direction of the movable dial plates 3 and 4 (vertical direction in the figure), that is, a hole that is long in the horizontal direction and that extends in the horizontal direction.
4b. A leaf spring 3 for pressing the cam pins 32a, 33a against the cam surfaces 3b, 4b is provided on each of the connecting portions 3A, 4A.
6, 36 are provided. Each of the cam surfaces 3b and 4b is formed in a curved surface whose central portion projects toward the leaf spring side 36.

In this way, the engagement of the cam pins 32a, 33a, which move circularly with the rotation of the pulleys 32, 33 in one direction, with the guide holes 3a, 4a causes the pulleys 32, 33 to move.
The rotation of 33 is converted into a linear motion and each movable dial 3, 4 is moved.
To be transmitted to. Then, when the cam pins 32a, 33a reach the position closest to the center as shown in FIG. 4, the movable dial plates 3, 4 are located at the closed position shown in FIG. 4 and close the opening 2a. Cam pins 32a, 3
When 3a reaches the outermost position, it is located at the open position shown in FIG. 2 and opens the opening 2a.

Further, the second drive mechanism 30 is arranged so that when the movable dial plates 3 and 4 are located at the open position and the closed position,
In order to detect this and stop the motor 31, a rib 32c having a semi-arcuate shape that is erected on the lower surface of the pulley 32.
And a photo sensor 37. The rib 32c is
Light-transmissive photosensor 3 provided on the support plate 15.
It is designed to pass between 7 and.

In the photo sensor 37, the pulley 32 is rotated 180 degrees in the arrow direction from the closed position shown in FIG.
When one end of the movable plate 3 is disengaged from the photo sensor 37, it is detected that the movable dials 3 and 4 have moved to the open position shown in FIG. The other end of the rib 32c is rotated as shown in FIG.
As shown in FIG. 3, when the space between the photo sensors 37 is entered, it is detected that the movable dials 3 and 4 are turned on and off to the closed position. Photo sensor 37
Detection signal is output to a control unit (not shown).

The guide mechanisms 40 and 41 are shown in FIGS.
As shown in FIG. 5, the guide ribs 40a and 41a projectingly provided on the support plate 15 and the protruding portions 3B and 4B formed at both ends of the movable dial plates 3 and 4 are fixed to the corresponding guide ribs 40a and 41a. And a slider 42 that slides on each.

The left and right guide ribs 40a and 41a are shown in FIG.
As shown in FIG. 3, the sliders have the same height dimension but absorb manufacturing errors between the both side surfaces of the left guide rib 41a and the inner surface of the left slider 42 sliding on the ribs. A gap d for allowing 42 to slide smoothly
In order to produce the above, the thicknesses of both ribs 40a and 41a are made different.

Further, the left and right guide ribs 40a, 41a
As shown in FIGS. 7 and 8, the central portion (the portion corresponding to the position of the horizontal line 11 shown in FIG. 1 in which the facing surfaces of the movable dials 3 and 4 contact each other) shown in FIG. It has guide surfaces 40a 'and 41a' whose height gradually decreases toward the front.

Each of the sliders 42 is of a rail shape having a U-shaped cross section. Each slider 42 is shown in FIG.
~ As shown in Fig. 7, elastic locking portions 4 formed on both side surfaces
2a and the guide ribs 40a formed on the lower surface of the upper wall,
Two contact portions 42b and 42c having different heights according to the inclined guide surfaces 40a 'and 41a' of 41a;
It has a protrusion 42d formed on the inner surfaces of both ends and two protrusions 42e formed on the upper surface of the upper wall portion. Locking claws 42a 'are formed at the ends of the elastic support portions 42a of the sliders 42, and the locking claws 42a' are formed in the corresponding locking holes 3c, 4c of the protrusions 3B, 4B. Each of the sliders 42 is elastically coupled to each slider 42 by snap fitting.
Are fixed to the corresponding movable dial plates 3 and 4. The gap d is formed between both side surfaces of the left guide rib 41a and the protrusions 42d of the guide rib 41a.

Further, each of the guide mechanisms 40 and 41 has a projection 42 of each slider 42, as shown in FIGS.
e to push each slider 42 into each guide rib 40a, 4
It has a leaf spring 43 that urges it toward the 1a side. Each leaf spring 4
One side part 43a of the third support plate 40a, 41a
It is fastened to the mounting boss portion 15e of 4 by four setscrews 44.

Each leaf spring 43 has an elongated shape as shown in FIG. At the central portion of each leaf spring 43, this leaf spring is deformed according to the inclined guide surfaces 40a ', 41a' of the guide ribs 40a, 41a, whereby each leaf spring 43 and each guide surface 40a ', 41a'. Slots 43a are formed in order to keep the distance d1 (see FIG. 8) constant.

A timepiece mechanical body 50 for rotating the minute hand shaft 6 and the hour hand shaft 8 is disposed on the lower surface of the support plate 15 as shown in FIGS. 3 and 10. As shown in FIG. 10, a center fixing nut 51 having an internal thread is press-fitted into the center hole 15f of the support plate 15, and the internal thread of the nut 51 has a lower end portion which is connected to the timepiece mechanical body 50. The external threads of the connected cylindrical center fixing screws 52 are screwed together, whereby the timepiece mechanical body 50 is fixedly held on the lower surface of the support plate 15.

As shown in FIG. 10, the hour hand shaft 8 has
A cylindrical bearing 53 that rotatably supports the rotary ornament 12.
Are arranged. The bearing 53 is joined to the fixing screw 52 by screwing the male screw at the lower end thereof to the male screw of the center fixing screw 52.

The bearing 53 has a flange portion 53a and a taper portion 53b for holding the rotary ornament 12 so as not to come off while being coupled to the center fixing screw 52.
The tapered portion 53b is a tapered surface 3C of the semicircular cutouts 3C and 4C formed in the central portions of the movable dials 3 and 4.
', 4C' can be engaged. The movable dials 3 and 4 are shown in FIG.
When the movable dial plates 3 and 4 are moved to the closed position as shown in FIG. It can be lifted slightly.

The dial opening / closing type timepiece further receives various input signals such as the hour signal output from the timepiece mechanical body 50 and the open position and closed position detection signals output from the photosensor 37. Accordingly, a control unit for controlling the motors 17 and 31 of the first and second drive mechanisms 16 and 30 and the melody generating means for generating various melody from a speaker (not shown) according to a program stored in advance. Have

When the control unit receives the hour signal from the timepiece mechanical body 50, the photosensor 37 detects that the movable dials 3 and 4 have moved to the open position shown in FIG. 2 by rotating the motor 31. Then, the motor 31 is stopped and the motor 17 is rotated, and when a certain time has elapsed from the start of rotation of the motor 17, the motor 17 is stopped and the motor 31 is rotated again, and the movable dial plate 3, The motor 31 is configured to stop when the photo sensor 37 detects that the motor 4 has moved to the closed position in FIG.

Next, the operation of the embodiment having the above structure will be described.

When the hour mechanical signal is output from the timepiece mechanical body 50 to the control unit at the hour, the motor 31 of the second drive mechanism 30 starts to rotate, and the movable dials 3 and 4 open together with the melody as shown in FIG. It starts to move linearly from the position toward the closed position in FIG. When the photo sensor 37 detects that the movable dials 3 and 4 have moved to the open position shown in FIG.
1 is stopped and the motor 17 of the first drive mechanism starts to rotate. As a result, the rotary ornament 12 starts to rotate and the left and right movable dolls 13 and 14 start a series of movements.

When a certain time has elapsed from the start of rotation of the motor 17, the motor 17 is stopped and the motor 31
Begins to rotate again. The movable dials 3 and 4 are shown in FIG.
When the photo sensor 37 detects that the motor 31 has moved to the closed position, the motor 31 is stopped.

In the dial opening / closing type timepiece according to the above-described embodiment, the fixed dial 2 having the opening 2a in the center and the two movable dials 3 and 4 for opening / closing the opening 2a are provided. The second drive mechanism 30 may drive only the two movable dial plates 3 and 4 forming a part of the dial plate. Therefore, the drive mechanism 30 is simplified, the load on the motor 31 is reduced, and the motor 31 may be small in size.
The drive mechanism 30 is downsized.

Since the two movable dial plates 3 and 4 linearly move in the opposite directions to open and close the opening 2a in the center of the fixed dial plate 2, both movable dial plates 3 and 4 are moved. Do not project outside the clock frame 1. Therefore, when the timepiece is hung on the wall surface, a wide area is not required around the timepiece, which is extremely advantageous in practical use.

Furthermore, since the guide mechanisms 40 and 41 for guiding and supporting the movable dial plates 3 and 4 in a linearly movable manner are provided at both ends of the movable dial plates 3 and 4, a large space for the opening 2a is provided. Space is secured in the center of the dial. Therefore, the opening area of the opening 2a can be increased,
With this, the rotary ornament 1 to appear in the opening 2a
The movable ornaments such as 2 and the movable dolls 13 and 14 can be made large, so that the appearance is improved and the movement of the movable ornament looks flashy.

Further, cam faces 3b and 4b of the guide holes 3a and 4a of the movable dial plates 3 and 4 corresponding to the cam pins 32a and 33a which move circularly with the rotation of the pulleys 32 and 33, respectively.
By sliding on the cam surfaces 3b and 4b while being pressed by the leaf spring 36, the rotational movements of the pulleys 32 and 33 are converted into linear movements and transmitted to the movable dial plates 3 and 4, respectively. Variations due to manufacturing errors in the shapes of parts such as 32a, 33a and cam surfaces 3b, 4b are absorbed, and each cam pin 32a, 33a slides on the corresponding cam 3b, 4b surface without separating. Therefore, it is possible to absorb the variation in the shape of the parts due to the manufacturing error and the detection error of the photo sensor 37, which allows the movable dial plates 3 and 4 to have the openings 2a.
When is closed, there is no gap between the abutting portions of the dial plates 3 and 4. Further, the cam surfaces 3b, 4b of the guide holes 3a, 4a are formed in a curved surface with their central portions projecting toward the leaf spring 36 side.
33a corresponds to each of the cam surfaces 3b and 4b, and a leaf spring 36 is provided.
When sliding on the cam surfaces 3b, 4b while being pressed by, the pressing force of the leaf spring 36 acting on the cam pins 32a, 33a becomes stronger as the cam pins 32a, 33a move to both sides of the cam surfaces 3b, 4b. I do not. Therefore,
The cam pins 32a and 33a can slide smoothly in the guide holes 3a and 4a, and the movable dial plates 3 and 4 can also move smoothly.

[0052]

As described above in detail, according to the dial opening / closing timepiece of the present invention (Claim 1), the fixed dial having an opening in the center and the two movable members for opening and closing the opening. With the configuration including the dial, the drive mechanism needs to drive only the two movable dials forming a part of the dial. Further, in this timepiece, since the two movable dials linearly move in opposite directions to open and close the opening in the center of the fixed dial, both movable dials do not project outside the timepiece frame. . Further, since the guide mechanism for linearly moving and supporting both movable dials is provided at both ends of both movable dials, a space for the opening is secured in the central portion of the dial. Therefore, the drive mechanism for the movable dial can be downsized, an opening having a large opening area can be arranged in the center of the dial, and when the watch is hung on the wall surface, it is wide around the watch. Does not need

Further, according to the timepiece of the present invention (claim 2), the cam pin of each pulley, which moves circularly with the rotation of each pulley, presses against the cam surface of the corresponding engaging portion of each movable dial with a spring. As it slides on the cam surface while being rotated, the rotational movement of each pulley is converted into a linear movement and transmitted to each movable dial, so that variations due to manufacturing errors in the shape of parts such as cam pins and cam surfaces are absorbed. , The cam pins slide on the corresponding cam surfaces without leaving. Therefore, it is possible to absorb variations in the shape of parts due to manufacturing errors, and when the movable dial closes the opening 2a, no gap is formed in the abutting portion of both dials, and the appearance is improved.

Further, according to the timepiece of the invention (claim 3), since the cam surface of each engaging portion is formed into a curved surface whose central portion projects toward the spring side, the cam pin of each pulley is When sliding on the cam surface while being pressed by the cam surface of each corresponding engaging portion by the spring, the pressing force of the spring acting on the cam pin does not become stronger as the cam pin moves to both sides of the cam surface. Therefore, each cam pin can slide smoothly in each engaging portion, and thus the movable dial can also move smoothly.

[Brief description of drawings]

FIG. 1 is a plan view showing a dial opening / closing timepiece according to an embodiment of the present invention, showing a state in which an opening is closed.

FIG. 2 is a plan view showing a timepiece with an opening opened.

FIG. 3 is a vertical cross-sectional view of FIG.

FIG. 4 is a plan view showing a movable dial plate and a drive mechanism thereof.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is a plan view showing a slider.

FIG. 7 is an explanatory view showing a guide mechanism.

FIG. 8 is an explanatory diagram showing a state in which a leaf spring is fixed to a support plate.

FIG. 9 is a plan view showing a leaf spring.

FIG. 10 is a cross-sectional view showing the structure near the center of the dial.

FIG. 11 is a cross-sectional view showing a state after the above operation.

[Explanation of symbols]

 1 Clock frame 2 Fixed dial 2a Opening 3,4 Movable dial 3A, 4A Connecting part 3a, 4a Guide hole (engaging part) 3b, 4b Cam surface 12 Rotating ornament (movable ornament) 13,14 Movable doll (movable) Decoration) 30 Second drive mechanism (drive mechanism) 31 Motor 32, 33 Pulley 32a, 33a Cam pin

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 22, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a dial opening / closing type timepiece according to the invention , showing a state in which an opening is closed.

FIG. 2 is a plan view showing a state in which an opening is open.

FIG. 3 is a vertical cross-sectional view of FIG.

FIG. 4 is a plan view showing a movable dial plate and a drive mechanism thereof.

[5] der sectional view showing a structure of the guide rib and the slider
It

FIG. 6 is a plan view showing a slider.

FIG. 7 is an explanatory view showing a guide mechanism.

FIG. 8 is an explanatory diagram showing a state in which a leaf spring is fixed to a support plate.

FIG. 9 is a plan view showing a leaf spring.

FIG. 10 is a sectional view showing a state in which the movable dial is opened.
is there.

FIG. 11 is a sectional view showing a state in which the movable dial is closed.
is there. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a dial opening / closing type timepiece according to the invention, showing a state in which an opening is closed.

FIG. 2 is a plan view showing a state in which an opening is open.

FIG. 3 is a vertical cross-sectional view of FIG.

FIG. 4 is a plan view showing a movable dial plate and a drive mechanism thereof.

FIG. 5 is a cross-sectional view showing a structure of a guide rib and a slider.

FIG. 6 is a plan view showing a slider.

FIG. 7 is an explanatory view showing a guide mechanism.

FIG. 8 is an explanatory diagram showing a state in which a leaf spring is fixed to a support plate.

FIG. 9 is a plan view showing a leaf spring.

FIG. 10 is a sectional view showing a state in which the movable dial is open.

FIG. 11 is a cross-sectional view showing a state in which the movable dial is closed.

[Explanation of reference numerals] 1 clock frame 2 fixed dial 2a opening 3,4 movable dial 3A, 4A connecting portion 3a, 4a guide hole (engaging portion) 3b, 4b cam surface 12 rotary ornament (movable ornament) 13, 14 movable doll (movable decoration) 30 second drive mechanism (drive mechanism) 31 motor 32, 33 pulley 32a, 33a cam pin

Claims (3)

[Claims] 1. A watch frame, a fixed dial having an opening in the center thereof, which is integral with the watch frame, and a closed position in which the facing surfaces are in contact with each other at a central position of the opening to close the opening. Two movable dials that are linearly movable in mutually opposite directions between the open position that opens the opening and two movable dials that are provided at both ends of the movable dials. A guide mechanism that guides and supports the movable dial, a drive mechanism that drives the movable dials, and a movable ornament that appears in the opening when the movable dials open the opening and performs a series of operations. A watch with a dial that can be opened and closed. 2. The drive mechanism is integrally formed on a motor, a pair of pulleys each having a cam pin and rotated by the motor, and both movable dial plates, and the corresponding cam pins are slidably engaged. A connecting portion having engaging engaging portions, each engaging portion having a cam surface extending in a direction substantially orthogonal to the moving direction of the movable dial, and at each connecting portion, The timepiece according to claim 1, further comprising a spring that presses the cam pin against the cam surface. 3. The timepiece according to claim 2, wherein the cam surface of each engagement portion is formed into a curved surface whose central portion projects toward the spring.