JPS6241610Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to fixing a wristwatch band.

In the conventional band fixing structure, as shown in FIGS. 1 to 4, the band is fixed to the case using holes or threads, spring bars, or screw pins. The first drawback of this method is that it requires drilling holes in the case, which increases costs. The second drawback is that when attaching with a spring bar, its thickness is limited due to strength and processing.
It is thicker than 1.2m/m, and as shown in Fig. 1 (a) is a cross-sectional view and (b) is a plan view, the h dimension is getting larger and completes are becoming thinner, so the thick band fitting part is important from the design point of view. , which is a big merit. In addition, a gap e was formed between the upper surface of the band and the body, resulting in a poor appearance.

The third step is to make the mating part look thinner.
In the case of Figures 4 and 4, since a long hole is drilled in the case, the thickness of the hole cannot be made very thin, and
In order to remove the remaining thickness i of the hole in Fig. 4, the thickness j of the fitting part must be 2.3 m/m or more.

On the other hand, there is a brazing method that does not require such drilling and attaches a thin band, but it requires processing costs and the band cannot be replaced, resulting in a defective band and immediately a defective case.

The present invention eliminates these drawbacks, reduces the number of man-hours required for manufacturing the fitting part, and makes the fitting part with the band thinner. Another goal is to create a sense of unity between the band and case, and to increase design variety.

Hereinafter, the present invention will be explained in detail based on examples.

FIG. 5 shows an embodiment of the present invention. A is an exploded back view of related parts, B is a side view of the case side,
C is a side view of the band. 51 is a band attachment piece, one end of which has a cylindrical shape.
-a and 51-b, and the other end has a flat surface 51-c.

The band attachment piece 51 is made by bending a plate material, and is spot welded at two or more locations 51-d. The fixing method may be brazing.

The attachment pin 52 has a stepped portion 52-a and is set to engage with the cylindrical portion of the band attachment piece.

A band 56 having a cylindrical portion 53 at a position opposite to the cylindrical portion of the mounting piece is set on the case body from the direction of arrow A, and the mounting pin 52 is pushed in from the direction of arrow B to fix the band.

The mounting piece 51-b is bent toward the center of the circle, and engages with the stepped portion 52-a of the mounting pin to prevent movement of the mounting pin in the axial direction.

The cylindrical portion may be formed integrally with the cylindrical portions 51-a and 51-b without being separated, and a cutout may be provided in the center to fix the mounting pin in the axial direction. However, this method is preferable because 51-b has spring properties.

A pin thickness of about 0.9m/m is sufficient.
In addition, the band mounting piece can be made with a plate thickness of 0.5m/m or less, and the k dimension (dimension from the back side of the case to the right end of the above piece) in B of Figure 5 is as follows:
1.9m/m or less is possible.

You can also use a leather band and fix it in a single-piece style.

If you look at this mating method from the front side of the watch, the seventh
As shown at 71 in the figure, the fitting part is visible, and this fitting part can be utilized as in this model, but if you want to hide it, there is a method shown in Fig. 6. A is an exploded back view of related parts, B is a side view of the case, and C is a side view of the band. In this case, a stepped portion 64 is formed on the case lower surface 64.
-a is provided, and the band attachment piece 61 is fixed to the inside of this step as described above.

Hereinafter, by attaching the band using the method explained in FIG. 5, it is possible to hide the fitting part from the watch surface.

Further, by extending the lower end 65-a of the back cover to the position indicated by the two-dot chain line 65-b, it is possible to make the fitting portion invisible from the back side.

On the other hand, there are two types of bands: one in which the band attachment part rotates with respect to the case, and another in which it is completely fixed and integrated with the case.
3 is provided with 63-b, and this is attached to the bottom of the case 64-a.
It is also possible to make it into a fixed structure by applying it to.

As described above, according to the present invention, there is a band attachment piece whose one end is fixed to the bottom of the case and a plurality of cylindrical parts are formed, and a band attachment piece whose one end is fixed to the band and the plurality of cylindrical parts do not overlap with the cylindrical part. At least one cylindrical portion of the plurality of cylindrical portions is formed to have spring properties, and engages with the stepped portion of the mounting pin using a mounting pin. By fixing the
It is no longer necessary to drill a long hole in the holding part of the mounting pin in the case body as in the past, and the outer diameter of the mounting pin can be reduced, and the thick part that holds the mounting pin can also be made thinner. Since the cylindrical parts of the mounting pieces are interlocked and defined individually, movement in the axial direction is restricted, and the band mounting part can be made rotatable relative to the case, or can be fixed to create a structure with a sense of unity. In addition, it becomes possible to hide the fitting portion of the mounting pin, so that the following effects are achieved.

1. The thickness of the fitting part between the band and the case can be made thinner.

2 There is no need to drill holes in the case, leading to a reduction in processing man-hours.

3. The band and case fit together neatly and with a sense of unity.

4. A wide variety of designs can be provided.

In the future, this band fixing structure will have a great effect in making complete products thinner and developing a total design of band and case.

[Brief explanation of the drawing]

1, 2, 3, and 4 show conventional band fixing structures. A in Figure 1 is a cross-sectional view,
B is its plan view. Figure 1 11: Spring bar, h: Case thickness at band fitting part, Figure 3 31: Screw pin, Figure 4 4
1: Fixing pin, i: Remaining hole thickness, j: Case thickness of mating part. 5 and 6 show examples of the present invention.
In each case, A is an exploded back view of related parts, B is a side view of the case side, and C is a side view of the band. Fig. 5 51: Band mounting piece, 52: Mounting pin, 53: Band tip, 54: Case bottom, 55: Back cover, 56: Band body, Fig. 6
61: Band mounting piece, 62: Mounting pin (5
2), 63: Band tip, 64: Case bottom, 65: Back cover. FIG. 7 is a plan view of a model example based on the present invention. 71: Cylindrical part of the band attachment piece.

Claims (1)

[Scope of utility model registration request] a case; a band attachment piece having one end fixed to the bottom surface of the case and a plurality of cylindrical parts formed at the other end; one end fixed to the tip of the band and the plurality of cylindrical parts formed at the other end; a band tip portion formed at a position that does not overlap with the cylindrical portion, and a mounting pin that is inserted from the lateral direction after the cylindrical portion and the cylindrical portion are arranged concentrically and connects the case and the band;
A watch band fixing structure, wherein at least one cylindrical part of the plurality of cylindrical parts is formed to have spring properties, and is fixed by engaging with a stepped part of the mounting pin.