JPS6145497Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a watch that allows users to easily change the dial and enjoy changes.

Previous users have voiced their desire to be able to freely change the dial of their watches. In the field of wall clocks, products that meet these demands have been announced, but in this case, the movement is removed from the case.
It seems like you can replace the dial of your choice from the gap between the hands and the movement, or you can remove the hands entirely, replace the dial, and then put the hands back on. However, in wristwatches, the gap between the hands is extremely small, the hands can only be attached and removed by an experienced person using tools, and the bare movement is extremely susceptible to dirt and dust, so it is extremely difficult for amateur users to remove the hands. It was beyond my control.

The purpose of this invention is to provide a timepiece structure that allows amateurs to easily replace the dials of watches of all sizes, from wristwatches to mechanical watches, and that does not pose any risk of mechanical failure. "A watch case has a first cavity located on the front side and a second cavity located on the rear side and isolated from the vacant space, and in the first cavity. A transparent disc to which the pointer is fixed and which is driven on the outer periphery and at least the mechanical part of the driving device are housed in the second empty space, and a dial is housed in the second empty space, and a transparent inner space is provided between the two empty spaces. ``A watch with a dial that is easy to replace, characterized by having a partition member.'' This will be explained below based on the drawings.

1 and 2 are a plan layout view and an AA sectional view of a wristwatch according to an embodiment of the present invention. 1 is the case, and the windshield 11 has a time scale printed on the back side.
It consists of a front frame 12 to which a transparent glass partition 13 is fixed, and a rear frame 15 to which a partition transparent glass 13 is fixed and a back cover 14 is fitted to the rear surface. In FIG. 1, the front frame 12 is removed to show the internal arrangement. These are tightened with screws or the like (not shown) with a waterproof gasket 16 in between. A first empty space 2 is formed between the front frame 12 and the rear frame 15. Further, a second empty space 3 is formed between the transparent partition member 13 on the rear frame and the back cover 14. Reference numerals 4 and 5 are transparent discs to which hands are pasted or images of hands are fixed by printing or vapor deposition, and when these are rotated, the hands appear to move like a normal wristwatch. Each disc has a windshield 11 or a partition 13
It is supported by a central shaft 6 fixed to. 7 is a step motor, 71 is a coil, 72 is a yoke, 7
3 is a rotor magnet, 74 is a rotor pinion,
The rotor is intermittently driven at a constant angle by pulses output from an integrated circuit 9 powered by a battery 8. Note that 10 is a crystal resonator. The illustration of the circuit board was omitted. The rotor pinion 74 meshes with the minute hand disc 5, and the minute hand disc 5 and the hour hand disc 4 are connected by a reduction gear train 23 at a predetermined reduction ratio.
The front frame 12 and the rear frame 13 have mortise holes for the gear train on their inner surfaces, and are equipped with the following components: the gear train 74 and 23, the pointer discs 4 and 5, the step motor 7, the battery 8, the IC 9, the crystal 10, etc. Both main element parts are sealed within the first cavity 2. Further, each driving element is arranged substantially outside the planar nave of the windshield 11 in front of the pointer disc. In the second empty chamber 3, the back cover 14 can be removed at any time to allow the user to select dial materials of their choice (metal, stone, cloth, paper, photographs, leather, coins, sand, pieces of precious stones, insect wings, plankton, etc.). (such as small creatures, pieces of paper with notes, mirrors, colored liquids, liquids with reflective pieces, luminescent materials, diffraction grating pieces...etc.)
can accommodate. The circular partition plate 13 is the rear frame 1
Although it is desirable to have an air-tight and waterproof connection with 5, a dust-proof connection can also achieve a considerable purpose.
The back cover 14 may also be omitted depending on the case.

As another embodiment, the central axis 6, which is difficult to achieve positional accuracy, can be removed as shown in FIG. That is, when the pointer disk 4 or 5 is meshed with three small gears 20, 21, 22 arranged around the pointer disk, it can be supported without a central axis. The mortise hole of each small gear is the other gear train 7
4, 23 etc. on the same member (front frame 12
Since the center shaft 6 is machined on the post-transfer frame 15), errors in direct distance and coordinates become smaller than in the case where the center axis 6 is provided on a separate member 13. A part of each small gear 20 to 22 can be used also as the rotor pinion 12 or another wheel train 23.

Further other embodiments (not shown) will be described. In the first embodiment described above, the power supply battery was also housed in the first cavity of the case, but in this embodiment, only the battery is placed in the second cavity. Of course, it is preferable that only the power terminal is exposed from the first cavity to the second cavity, and that the vicinity of the terminal is at least constructed to be dustproof compared to the first cavity. In addition, non-moving parts such as coils and circuits may also be placed outside the first cavity as long as electrical and magnetic coupling is maintained, but at least the mechanical drive element is placed within the first cavity. be done. With this configuration, a wet dial material cannot be used because the electrodes will be shot, but it is convenient for the user to replace the battery himself.

Furthermore, as another embodiment, both the first vacant room and the second vacant room
A third empty space isolated from the other empty rooms may be provided, and a power supply battery, electrical parts, and magnetic parts may be stored in this third empty room. The third empty space is provided with a battery hatch on the back of the watch case.

Furthermore, in each of the embodiments, the hands are not limited to hour and minute hands, but it is theoretically possible to add a second hand to form a three-hand system.

Although various embodiments have been described above, the structure of the case 1 is not limited to the one consisting of the front frame, rear frame, and back cover as shown in the illustrated example. The key is to get at least two isolated rooms. Further, the wheel train and the drive element do not need to be directly supported by the case, and may be mounted on a ring-shaped base plate, for example.

As described above, in this invention, at least the mechanical drive elements such as the rotor, wheel train, and hands are separated from the dial, so the user can easily operate the watch without affecting the drive mechanism of the watch. The effect is that you can attach your favorite material as a dial and enjoy looking through it. Another advantage of this arrangement is that the center of the movement is thinner, so even if the dial housing is made deeper, it does not significantly affect the thickness of the watch.

[Brief description of the drawings]

FIG. 1 is a plan view showing the arrangement of one embodiment of the present invention, FIG. 2 is a sectional view along line AA of the same embodiment, and FIG. 3 is a plan view of main parts of another embodiment of the present invention. 1...Case, 2...First vacant room, 3...Second
vacancy, 4, 5...transparent pointer disc, 13...transparent partition plate.

Claims (1)

[Scope of utility model claims] The watch case has a first cavity located on the front side and a second cavity located on the rear side and isolated from the cavity, and a pointer is fixed in the first cavity. At least a mechanical part of a drive device and a transparent disk that is driven on the outer periphery are housed, a dial is housed in the second empty space, and a transparent partition member is provided between the two empty spaces. A watch with an easily replaceable dial.