JPS6333184Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a timepiece mechanical body unit with a calendar display device.

[Prior Art] A day display disc and a date display disc that display the day of the week, the date, etc. are arranged coaxially, and the day display disc is arranged in the center recess of the date display disc, so that both display discs are arranged coaxially. A clock equipped with a calendar display device in which the display surfaces of the calendar display devices are arranged on substantially the same plane is well known.
However, in the past, when providing a timepiece with a calendar display, the timepiece wheel train, particularly the development of the wheel train, was specially designed to match the calendar display mechanism.

[Purpose of the invention] In view of the above-mentioned circumstances, the purpose of the invention is to provide a watch with a calendar display by sharing the watch mechanical body used in a normal analog watch without a calendar display, and thereby providing a watch with a calendar display. The goal is to provide the following at a low cost.

[Characteristics of the invention] The features of the invention are that a clock mechanism body for a normal analog watch is used, and a second hour wheel is fixed to the exposed part of the hour hand pipe of the clock mechanism body, while a calendar display display is installed. A calendar mounting plate supporting a disc and a calendar feed gear for driving the disk is detachably connected, so that the calendar feed gear meshes with the second hour wheel.

[Embodiments] Hereinafter, details of the present invention will be described with reference to embodiments shown in the accompanying drawings.

As shown in FIGS. 1 to 3, the timepiece mechanical body unit with a calendar display mechanism of this embodiment includes an ordinary timepiece mechanical body 1, a calendar mounting plate 2 that is detachably attached thereto, and a calendar mounting plate 2 that is attached to the calendar mounting plate 2. It is composed of a day display disc 3, a date display disc 4, etc., which are supported in a double concentric manner.

Therefore, details of the calendar mounting plate 2 will be explained with reference to FIGS. 4 and 5. The calendar mounting plate 2 is integrally formed from a plastic material and protrudes integrally from the back side of the collar 5. The calendar mounting plate 2 is provided with a hook 6 formed therein, and the calendar mounting plate 2 can be attached to and detached from the front of the timepiece mechanism body 1 via the hook 6. An arcuate rib 7 protrudes forward from the center of the collar 5, and a center screw 9 is fixed to the center of a front wall 8 integrally formed from the front end thereof. An hour hand pipe 10 and a minute hand pipe 11, which are rotationally driven by a clock train (not shown) of the timepiece mechanical body 1, protrude forward through the center screw 9, and are press-fitted onto the outer peripheral surface of the hour hand pipe 10. A second hour wheel 12 is located in the central space of the rib 7. Further, a guide surface 13 is formed concentrically and protrudes forward from the collar 5, and the tips of the teeth 14 and 15 on the inner circumferences of both display discs 3 and 4 are formed on this guide surface 13. is rotatably supported.
In FIG. 1, the tooth portion 15 of the outer display disk 4 is omitted to avoid complication of the drawing. Furthermore, click levers 16 and 17 integrally formed in the circumferential direction are located in the hollow part on the outside of the rim 7, and a click cam 18 of the click lever 16 is located between the teeth 14 of the day display disc 3 and a click lever. Lever 17
The click cams 19 of the outer display disks 4 engage between the teeth 15 of the outer display disks 4, thereby causing both display disks 3,
4 is being dominated. The teeth 14 and 15 respectively
Feed claw 2 for intermittently feeding one tooth at a time in 24 hours
0 and 21 are formed integrally with a calendar feed gear 22, and this gear 22 is inserted into a shaft portion 23 integrally formed to protrude from the front wall 8 and meshes with the second hour wheel 12. As shown enlarged in FIGS. 6 and 7, the feed pawl 21 for the date display disc 4 is shifted in phase by a predetermined angle with respect to the feed pawl 20 for the day display disc 3. When the feed pawls 20 and 21 rotate counterclockwise in FIG.
begins to feed the date display disk 4. Therefore, it is avoided that the loads applied when both display disks 3 and 4 are moved simultaneously are avoided, and the load acting on the timepiece mechanical body 1 is reduced. Further, a collared locking pin 24 is removably press-fitted into the front outer periphery of the front wall 8, and this locking pin 24 prevents the display disks 3, 4 from coming off.

As shown in FIG. 1, the day of the week is printed on the front of the day display disc 3 using three alphabetic characters, and the date numerals are printed on the front of the date display disc 4. The day display disc 3 is connected to the date display disc 4 as shown in FIG.
By being placed and accommodated in the central recess 25 of
The front surfaces (display surfaces) of both display disks 3 and 4 are arranged on the same plane. A plurality of blades 26 are formed from the back side of the day display disk 3.
6 are arranged concentrically and radially at equal intervals as shown in FIG. A plurality of bridges 27 are formed concentrically protruding toward the back surface of the date display disk 4 so that the blades 26 can be fitted therein. As shown in FIGS. 1 and 3, there is an opening 28 between the bridges 27, and the blade 26 is exposed on the back side from this opening 28. The blade 26 can be rotated by placing a finger on the exposed blade 26. is possible,
As a result, the display of the day of the week on the weekday display disk 3 in the display window 30 can be corrected. Further, the date display disk 4 can use its bridge 27 to correct the display. That is, by placing a finger on the back of the bridge 27 and turning it, the date display on the date display disc 4 in the display window 30 is corrected. The outer surface of the bridge 27 is provided with knurled concavities and convexities 29 to facilitate correction.

The display window 30 is provided in the dial portion of the timepiece frame to which the timepiece mechanical unit with calendar display mechanism configured as described above is attached.

[Effects of the invention] According to the invention described in detail above, when providing a watch with a calendar display device, it is possible to use the watch mechanical body used in a normal analog watch without a calendar display as it is, and As a result, a watch with a calendar display device can be provided at low cost.

[Brief explanation of the drawing]

The drawings relate to one embodiment of the present invention, in which Fig. 1 is a front view thereof, Fig. 2 is a rear view thereof,
FIG. 3 is an enlarged sectional view taken along the line of FIG. 1, FIG. 4 is a front view showing a partial cross-section of the calendar mounting plate, and FIG. 5 is a rear view showing a partial cross-section of the same calendar mounting plate. FIG. 6 is an enlarged front view of the calendar feed gear, and FIG. 7 is a sectional view thereof. 1... Clock mechanical body, 2... Calendar mounting plate, 3
...Day display disc, 4...Date display disc, 10...
Hour hand pipe, 11...Minute hand pipe, 12...2nd
Hour wheel, 14...Gear for the day display disc, 15...Gear for the date display disc, 20...Feed claw for the day display disc, 21...Feed claw for the date display disc, 22...
Calendar feed gear.

Claims (1)

[Scope of Claim for Utility Model Registration] A watch mechanical body in which a watch train, etc. is provided and at least an hour and minute hand pipe protrudes forward, and a second hour hand pipe fixed to the protruding portion of the hour hand pipe. an hour wheel; a calendar mounting plate that is removably connectable to the clock mechanical body from the front thereof; a day display disc and a date display disc that are coaxially and rotatably supported on the calendar mounting plate; The feed pawl is rotatably supported on the calendar mounting plate, and is engaged with the second hour wheel and is engageable with each tooth portion formed on each inner peripheral edge of both of the display discs. A clock mechanical unit with a calendar display device consisting of a calendar feed gear and a calendar feed gear.