JPS5831106Y2 - Positioning structure of wristwatch body and movement - Google Patents

Description

[Detailed explanation of the idea] The structure of the parting plate of conventional digital watches can be broadly classified as follows: ■The parting plate is fixed to the movement with screws, etc., and then attached to the body from the back side.

■Form that fixes the partition plate from the glass side to the body. There are two main types.

Among these, the method of installing the movement integrated with the parting plate described in item 0 from the back cover side has the advantage of being able to position the parting plate and the movement in a plane, but the disadvantage is that the parting plate It is necessary to form the outer planar shape of the back cover to match the shape of the needle surface of the back cover. Especially if the planar shape of the parting plate is non-circular, the shape of the needle surface of the back cover will also be non-circular, making machining difficult. There was a problem that this led to an increase in costs.

As a countermeasure to this problem, there is a method in which a parting plate mentioned above is attached from the glass side, which has a circular outer planar shape on the back cover and can be adapted to various parting plate pair planar shapes.

In the case of digital display watches, compared to analog watches, there are no hands, so there is no need to attach parts such as hands to the movement, even if a parting plate that replaces the dial of analog watches is inserted from the glass side. It can be made into a structure.

With this structure, only one type of back cover is needed to match the outer shape of the movement, and the planar shape of the parting plate can be varied by simply changing the planar shape of the glass entry part of the body.

The purpose of this invention is to improve the appearance by improving the drawback of this type of planar shape that the parting board and panel are tilted. The present invention will be described in comparison with a conventional structure only.

First, the structure of a parting plate portion of a conventional digital display wristwatch will be explained with reference to the drawings.

Figure 1 is a partial cross-sectional view showing the structure of a conventional digital display wristwatch. 1 is the movement, 2 is the glass, 3 is a waterproof ring to keep the glass part waterproof, 4 is the body, and 5 is the view from the glass side. This is a device-type partition board that forms the partition shape of the panel and has the effect of masking unnecessary parts on the outer periphery.

6 is a mechanical support ring, 7 is a back cover, 8 is a back cover gasket to keep the back cover part waterproof, and 9 is a middle frame that pushes up the movement.

In this conventional structure, the positioning of the internal part 5a of the parting plate and the display panel of the movement in a plan view was not done.

1. The parting plate and the movement or panel do not directly engage, but are positioned in the radial direction via the inner frame or mechanical support ring, back cover, body, and waterproof ring, and in the rotational direction, the movement is horizontal. In other words, the position was determined indirectly through the winding stem button provided in the direction, an external operating member, etc.

Normally, gaps are provided between each part to absorb dimensional variations during mass production, but gaps between the parts can cause deviations, rotations, and other looseness, especially when using conventional methods such as those mentioned above. According to this structure, a large number of parts are used to determine the positional relationship between the parting board and the panel, which increases the amount of deviation and rotation, and the need for cohesion and
As shown in Figure 2, the panel sometimes tilted relative to the parting board and the body, resulting in a very poor appearance.

In the past, to prevent this, it was necessary to adjust the gap during assembly or reassemble the product, but this was inefficient in terms of mass production and led to increased costs due to increased man-hours. was.

The present invention improves the above-mentioned drawbacks of the parting plate in conventional digital display wristwatches. A notch, a large size or a protrusion is provided on the parting plate receiving wall, a protrusion, a notch or a hole is provided in the movement to engage with the protrusion, and the movement and the body are connected by engaging the two. This will be explained in detail below using the drawings.

FIG. 3 is a partial cross-sectional view of a parting plate of a digital display wristwatch showing an embodiment of the present invention, and FIG. 4 is a partial cross-sectional plan view thereof.

The basic structure is the same as the conventional one, but in this case, a notch 14a is provided in a part of the parting plate receiving surface 14b which is the parting plate receiving wall of the side 140, and the movement has a projection 11a that engages with the notch 14a. is the provision.

The notch 14a and the protrusion 11a are engaged with each other when assembled, so that the barrel 14 and the movement 11 can be directly positioned.

Since the body 14 and the parting plate 15 are positioned based on similar shapes, misalignment between the parting plate 15 and the panel can be extremely reduced.

Furthermore, there is no need for correction work during assembly.

In addition, this invention is as shown in the partial cross-sectional plan view shown in Fig. 5.
The same effect can be obtained by using a hole 14c instead of the notch 14a shown in FIG. 4.

In the past, as shown in the partial sectional view shown in FIG.
4a, and the movement 21 is provided with a notch or hole 24a that engages with it, and the same effect as described above can be obtained by incorporating the cutout or hole 24a.

In addition, by providing a tightening allowance between the protrusion and the notch or hole in Figures 3 and 6, the present invention eliminates play between the protrusion and the notch or hole, so that the body and movement can be easily adjusted after assembly. The misalignment can be reduced by the amount of backlash and variations in the parts of the protrusion and the notched casing or hole.

In the past, in a structure in which a tightening allowance was provided between the above-mentioned protrusion and the notch housing or hole, a notch 31b was provided in a part of the protrusion 31a in the insertion direction, as shown in the partial cross-sectional view of FIG. If the structure is such that the projection 31a is assembled into the notch 34a, the projection 31a has a spring property due to the notch 3Ib.
The force required to assemble the movement 31 into the notch or hole 34a is reduced, making it easier to assemble the movement 31.

Moreover, in terms of reducing the misalignment between the barrel and the movement, which is the aim of the present invention, it is possible to obtain the same effect as the structure in which a tightening margin is provided between the projection and the notch case or hole described above.

Further, although this figure shows the movement provided with a protrusion, the same effect can be obtained by providing a protrusion on the body and providing a notch in the protrusion.

Once upon a time, the present invention proposed a structure in which a tightening margin is provided between the above-mentioned protrusion and the notch bud or hole, and two or more protrusions 41a and 41b are provided as shown in the partial cross-sectional plan view shown in FIG. By providing springiness between the protrusions, it is possible to obtain the same effect as the structure in which a part of the protrusions is provided with a notch.

As described above, the present invention improves the appearance and reduces costs by preventing misalignment between the parting plate and the display part without changing the basic exterior structure. Since the plate receiving wall is covered, it is possible to hide the alignment engagement portion between the parting plate receiving wall and the movement, which prevents an unsightly appearance, and is particularly effective when considering the application to digital display wristwatches, which have been increasing recently. This is a large one.

[Brief explanation of drawings]

Figure 1 is a partial sectional view of a conventional digital display wristwatch, Figure 2 is a plan view of the appearance of a conventional digital display wristwatch, and Figure 3 is a partial cross-sectional view of a conventional digital display wristwatch.
6 and 7 are partial sectional views of a digital display type wristwatch showing an embodiment of the present invention, and Figs. 4, 5, and 8 are partial sectional views of a digital display type wristwatch showing an embodiment of the present invention. FIG. 3 is a partially sectional plan view. Lll, 21.31...Movement, 2゜1
2.22,32...Glass, 3,13,23゜33...Waterproof ring, 4,14,24,34.
...Body, 5,15,25,35...Parting plate, 6,16゜26.36...Mechanical receiving ring,
7, 17, 27° 37... Back cover, 8, 18,
28, 38... Urabutapatsukin, 9, 19, 2
9, 39...middle frame, 41a, 41b...
・Protrusion of movement (shape or body), 44b...
- Parting plate receiving surface of the body.

Claims (1)

[Scope of Claim for Utility Model Registration] l) A parting plate is placed on the parting plate receiving wall of the body so as to cover the parting plate receiving wall, and a cutout or a protrusion is provided in the parting plate receiving wall, and the movement A structure for positioning the body and movement of a wristwatch, characterized in that the movement and body are positioned by providing a protrusion, notch, or hole that engages with the body and engaging the two. 2) The structure for positioning the body and movement of a wristwatch as claimed in claim 1, wherein the body and movement are engaged with each other with a tightening margin. 3) A body and movement positioning structure for a wristwatch according to claim 1, wherein a notch is provided in a part of the protrusion in the insertion direction to impart spring properties. 4) The structure for positioning the body and movement of a wristwatch according to claim 1, wherein the protrusions are provided at two or more locations, and the two or more protrusions are provided with spring properties.