JPS6234313Y2 - - Google Patents

Description

[Detailed explanation of the idea] This idea relates to the wristwatch side.

Specifically, a lead-out part (lead wire) that electrically connects the watch body (electronic watch function) built into the side (case) and the watch function components arranged in the band part is led out from the side. The goal is to develop a wristwatch that has a waterproof structure with a small number of parts and a simple structure.

Conventionally, all the components of an electronic wristwatch are generally housed inside the side, but in order to make the wristwatch more compact, it is necessary to install some of the components in a position that is removed from the side.

From this point of view, this invention consists of constructing the lead-out portion that leads out from the side with a flexible printed circuit board that can accommodate the bending of the band, and solving the waterproof structure of the side with an extremely simple structure.

This invention will be explained below based on the drawings.

FIG. 1 is a vertical cross-sectional view showing an embodiment of the wristwatch side with a printed circuit board attached thereto. 1 is the side where the glass 2 is attached to the dial side;
An O-ring-shaped packing 4 that can be brought into close contact with the flange 3a of the back cover 3 is provided on the inner wall stepped portion 1b of the housing 1b, and a tightening ring 5 is provided on the body wall 1c for fixing the back cover 3 to the body 1a. A threaded portion 6 is provided to which a screw can be screwed. On the other hand, an O-ring-shaped packing 7 is attached to the flange 3a of the back cover 3 at a position facing the packing 4.

As is clear from FIG. 3, the trunk wall 1c is further provided with a groove 8 located between the wall surfaces 1d and 1d, and the flange 3a of the back lid 3 has a projection that can engage with the groove 8. 9 is provided.

10 is a printed circuit board, and this printed circuit board 10 has a planar shape shown in FIG.
When attaching the back cover 3 to the body 1a, the ring-shaped base portion 10a is attached to the inner wall stepped portion 1b.
and the flange 3a. In this case, the base portion 10a is held waterproof by the packings 4 and 7 that are in close contact with both sides, but since the printed circuit board 10 is made of a flexible material, the above-mentioned waterproof effect is further enhanced. The structure is such that the deflection of the lead-out portion 10b led out of the shell 1a by the above-mentioned holding does not reach the terminal portion 10c.

In the above, the printed circuit board 10 is composed of a lead-out part 10b that projects outwardly from a ring-shaped base part 10a and a terminal part 10c that projects inwardly. It has a flexible structure in which wiring 10d is provided and the wiring is overcoated. In the assembly, the wiring part of the terminal part 10c protruding inward is electrically connected to the watch body (not shown) built in the side 1, and the other lead-out part 10b is connected to the band from the groove 8. It is led out of side 1 towards 11.

The attachment of the printed circuit board 10 to the side 1 thus involves the mounting of the printed circuit board 10 on the lead-out portion 10
The base part 10a is stacked on the inner wall step part 1b by aligning the base part 10a with the groove 8 of the side 1, and then the protrusion 9 of the back cover 3 is engaged with the groove 8 in which the lead-out part 10b is housed, and the back cover 3 is attached to the base. Place the tightening ring 5 over the portion 10a.
Screw it onto the threaded part 6 of the body 1a and attach the back cover 3 to the body 1a.
Tighten it. In this case, when the tightening ring 5 is tightened, the back cover 3 tries to rotate due to the tightening friction, but since the back cover 3 is provided with a protrusion 9 that engages with the groove 8, it remains unrotated. , the lead-out portion 10b of the printed circuit board 10 is connected to the groove 8.
It can be held in a occlusal manner by the surface and the 9 protrusions. Therefore, the printed circuit board 10 for the side 1 has a narrow crimp between the inner wall stepped surface 1b having the packings 4 and 7 and the flange 3a, and a further narrow crimp between the groove 8 and the protrusion 9 for the lead-out portion 10b. can be held stably.

In this way, the lead-out portion 10b led out of the side 1 can be connected to a desired electrical component (not shown, for example, a display function switching switch, a battery, etc.) placed at an appropriate position on the band 11. , side 1
The functional circuits within can be appropriately switched on the band 11 side.

The lead-out portion 10b may be inserted into the band 11 at a desired position and connected to the band 11.
In addition to connecting the parts along the same plane, the lead-out part 10b may be inserted in advance into the band 11 when the band 11 is molded from a synthetic resin material.

Since the wristwatch side of this invention is as described above,
With the miniaturization of electronic wristwatches, the electrical connections between the electrical parts placed outside the side and the main body inside the side can be made properly through the lead-out part, and moreover, the lead-out part taken out from the inside of the side and the inside main body can be properly connected. Since the waterproof mechanism is configured to be solved with an extremely small number of parts and an extremely simple assembly structure, it can greatly contribute to improving the productivity of small electronic wristwatches and improving the ease of disassembly for repairs. In addition, it is very convenient because it can be constructed without damaging the appearance of the side.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a longitudinal sectional view of the main parts showing the side enlarged, FIG. 2 is a plan view of the main parts of the printed circuit board, and FIG. 3 is an exploded perspective view of the side components. 1... side, 1a... body, 1b... inner wall step, 1
d... Also wall surface, 3... Back cover, 4, 7... Packing, 5... Tightening ring, 8... Groove, 9...
Projection, 10...Printed circuit board, 10b...Leading out portion.

Claims (1)

[Scope of utility model registration request] On the side of a wristwatch having a structure in which the case back is fixed to the case with a tightening ring, a flexible printed circuit board is arranged between the case and the case back, and on both sides of the printed circuit board at a position in contact with the case and the case back. A protrusion is provided on the outer periphery of the back lid through a packing, and this protrusion is engaged with a groove provided at the lower part of the wall surface of the body, and a lead-out portion provided on the printed circuit board is engaged with the groove provided on the lower part of the wall surface of the body. The wristwatch side is characterized by being led out from between the grooves and protrusions.