JPS5850318Y2 - digital watch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a movement of a digital wristwatch.

In detail, it relates to the connection between the outer case and the movement.

The purpose of this invention is to reduce the number of parts by having a part of the movement function as an inner frame that has at least one of the following functions: fixing the movement to the exterior and waterproofing. The purpose is to securely fix it.

Conventionally, an inner frame was constructed as a separate part between the movement and the outer case, and this inner frame fixed the movement and formed part of the waterproof packing box.

This method requires a separate part called the inner frame, which increases the cost and makes assembly difficult.The movement and the inner frame, and the inner frame and the outer case, are two parts that are combined, and the movement and the outer case are combined. The backlash is expanded.

Especially in the case of digital watches, the time is displayed in horizontal rows of numbers on the display, making it easy to see the misalignment between the case and the display, making it easy to notice even the slightest misalignment.

For this reason, it is particularly necessary to reduce play between the movement and the outer case.

If the inner frame is separated, if the inner frame is not strong enough as a single part, there is a risk of breaking the inner frame when assembled, so it will have to be of a certain size, and the outer shell for inserting this inner frame around the outer shape of the movement will be required. The case becomes larger, and the case becomes larger relative to the movement display, which creates a disadvantage in terms of design.

The present invention eliminates these drawbacks, and reduces the number of parts by allowing a part of the movement's circuit support member to also serve as the inner frame, and by fixing the circuit support member to the movement board with screws, etc. as one,
The objective is to minimize play between the outer case and the movement, reduce misalignment between the case and the display, and securely fix the movement to the outer case.

This will be explained below using figures.

Figure 1 shows an example of conventional movement fixation, with the middle frame 2
is a separate body, which forms a packing box for the waterproof packing 1 and also serves to fix the movement 4 to the exterior.

3 is the back cover, and 5 is the outer body.

In this method, the inner frame 2 is a separate part, increasing the number of parts, and since the movement 4 and the back cover 3 are fixed by the inner frame, there is no play between the movement and the inner frame, and between the back cover and the inner frame. occurs, and the play in the exterior and movement increases.

Even when incorporating the movement into the exterior, it is difficult to handle because the inner frame is a separate part.

Because the inner frame is inserted separately between the case and the movement, the case becomes larger, and the exterior becomes larger than the display of the movement, which creates a disadvantage in terms of design.

FIG. 2 shows an example of fixing the movement to the exterior according to the present invention, in which the circuit support member 6 supports the battery 10, the crystal oscillator, or other elements, and the circuit support member 6 supports the movement substrate 12. It is fixed to by screws 11.

In this example, it is fixed with screws, but it may be fixed with caulking or the like.

The circuit support member 6 also serves as a cover for the movement, and has the caliper number, manufacturing code, manufacturing company name, country name, etc. printed on the top surface.Several types are prepared depending on the destination, and at the end of movement assembly. By attaching it, you can easily change it depending on the destination.

A part of this circuit support member 6 forms a part of the packing box of the waterproof packing 7, and fixes the movement to the outer case 8.

With this method, unlike the conventional inner frame, it is not a separate part, so it does not increase costs and is easy to assemble.Since it is integrated into the movement with screws 11 etc., there is no play with the exterior.
There is only play between the circuit support member and the exterior shell, and there is less play compared to the conventional example shown in FIG. 1, and the fixation is reliable.

Furthermore, in the case of a digital wristwatch with a liquid crystal display, the liquid crystal panel 13 is held by a panel frame 15 and fixed to the substrate 12 with a panel presser 14 via conductive rubber 16.

In this case, if force is inadvertently applied to the liquid crystal panel section 13 due to a switch operation or the like, the liquid crystal will smudge and the smear will remain on the liquid crystal panel, which is not desirable.

Therefore, it is necessary to prevent external forces from being applied to the display section.

Therefore, it is important that the bonding to the exterior is done at a part that is not related to the panel part.

Taking this into consideration, the present invention includes an extension portion 6a in which the circuit support member 6 is disposed with a gap between the movement and the movement.
The structure is such that the tip 6b of the extension 6a is supported by the body 8 and the back cover 9.

According to the configuration of the present application, a movement is constructed by fixing a liquid crystal panel to one surface of a circuit board and fixing at least a circuit support member for supporting a battery to the other surface, and the circuit support member is It has an extension part extending in the direction of the liquid crystal panel, and the extension part is formed to have a gap with the movement, and the tip part is supported by the body and back cover, so it has the following effects. It is something that you have.

a) There is no need for a separate inner frame between the movement and the exterior as in the past, and a part of the circuit support member is extended and supported by the body and back cover, so there is no play between the movement and the exterior. This makes it possible to provide a configuration in which the panel hardly shifts against the exterior.

b) The movement is supported by extending a part of the circuit support member placed on the back cover side of the circuit board toward the liquid crystal panel while maintaining a gap with the movement, and supporting the tip of the extended part with the body and the back cover. Since the extended portion of the circuit support member acts as a buffer, the impact force applied to the exterior will not directly affect the liquid crystal panel or the circuit elements, making it possible to provide a digital wristwatch with excellent impact resistance.

[Brief explanation of drawings]

Figure 1 shows a conventional digital wristwatch using an inner frame. Figure 2 shows a digital wristwatch according to the present invention. 1.7...Waterproof gasket, 2...Inner frame, 3,9...Back cover, 4...Movement, 5,8... ... Outer body, 6 ... Circuit support member, 10 ... Battery, 11 ... Screw, 12 ... Board, 13 ... Liquid crystal panel, 14...Panel fixing member, 15...
Panel frame, 16... Conductive rubber.

Claims (1)

[Scope of utility model registration request] Exterior parts such as the body, back lid, packing, cover glass, etc.
In a digital wristwatch that is composed of a movement that includes at least a display section and a circuit section, the movement has a liquid crystal panel fixed to one side of a substrate by a panel fixing member, and at least a screen for positioning a battery on the other side. A circuit support member is configured to be fixed, and the circuit support member has a part of the extension part extending toward the liquid crystal panel, the extension part is formed to have a gap with the movement, and the tip part is formed to have a gap with the movement. A digital wristwatch characterized in that it is supported and fixed by the body and the back cover.