JPS5843857Y2 - watch band length adjustment device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a metal watch band length adjustment device.

Conventionally, various devices for adjusting the length of watch bands have been widely used, but in recent years, as watches have become thinner, there has been a demand for thinner bands. There is also a desire to reduce the curvature of the entire band by making the pitch as short as possible.

That is, if we take the known length adjusting device as shown in FIGS. 1 and 2 as an example, the latter problem can be understood.

First, the structure of a conventional example will be explained. FIG. 1 is a perspective view of the adjustment piece before it is connected, and FIG. 2 is a sectional view when it is connected.

The adjustment piece 11 is formed by winding a plate material to form a hollow body, and an embedded core plate 12 is fixed to the hollow portion 11 a to form a hollow body.
and close one outlet of the adjustment piece 1 adjacent to one end.
1', and a convex part 11C at the other end that engages with another adjacent adjustment piece 11', and when these adjustment pieces are combined, the separate U-shaped plate 13 can be adjusted. The piece 11 is inserted into the hollow part 11a, and the shaft 13a of the U-shaped plate 13 is passed through the convex part 11'C of the adjacent piece 11', and the hooked tip part 13b is inserted.
is engaged with the engaging portion 12a of the embedded core plate 12, thereby connecting the adjustment piece 11 and the adjacent adjustment pieces 11', 11''.

This structure is one of the commonly used methods of fixing the embedded core plate and the locking plate.

This structure is an adjustment device that is established by the engagement of the embedded core plate 12 and the U-shaped plate 13, so the embedded core plate 12 is interposed in the direction of the pitch width of the piece and is engaged with the U-shaped plate 13. There is a need.

Therefore, the pitch width t of the adjustment piece inevitably becomes large, making it impossible to satisfy the above-mentioned demands of recent bands.

The present invention was devised in view of the above-mentioned problems, and provides a watch band length adjusting device that can shorten the pitch width of the bridge and is easy to process.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 3 to 5, 1 is an adjustment piece having a hollow portion 1g, 2 is an adjustment pin A, and 3 is an adjustment pin B.
The only difference between this and B3 is that the foot portion A2a and the foot portion 13.2b are symmetrical as shown in Fig. 4A, and the other structures are the same.

Next, the structure of the adjustment pin A2 is as follows: First, the outer shape is formed from a sheet of plate material by press punching, and then the pins are bent and overlapped at the bending portions 2C and 2d as shown in FIG. 4.

The hole 2e is a pull-out hole for hooking the adjustment pin A2 when pulling it out with the tip of tweezers or the like when separating the adjustment piece 1.

The elastic holding parts 2 f and 2 g have guide slopes 21 and are used when connecting and locking the protrusions of adjacent adjustment pieces when the adjustment pieces 1 are connected.

The cutout portion 2h is a cutout for making it easier for the foot portion B2b to elastically deform when the adjustment pin 2 is inserted.

Next, to explain how to connect the adjustment pieces 1 shown in FIGS. 3 and 5, the method shown in FIG. 5A is a partially enlarged plan view of the insertion part of the adjustment pin A2 in FIG. 3, and the same figure is a side view thereof. First, as shown in FIG. The plurality of connecting projections 1d and recesses 1e of the adjustment piece 1 are combined, and the adjustment pins A2 and B3 are inserted from the outside of both sides of the adjustment piece 1, respectively.

Moreover, as shown in the partially enlarged view of the 9th hole in Fig. 5A, the adjustment pin A is
2, the inside of the connecting convex portion 1d of the adjusting piece 1 shown in FIG. 3 forms a hollow portion 1d' as shown in the side view of the opening in FIG. When the adjustment pin A2 is inserted, the foot part A2a passes through the hollow part 1g of the adjacent piece to connect it, and at the same time, the bent part 1b is held and locked by the holding parts 2f and 2g.

Due to this locking, the adjustment pin A2 is held within the adjustment piece 1.

When removing the adjustment pin A2 from the adjustment piece 1, insert tweezers etc. into the notch 1a and insert the tip of the adjustment pin A2 (
It can be easily and quickly removed by hooking it onto L2e and pulling it out.

6 to 8 show other embodiments of the present invention, which differ from the above-described embodiments of the present invention in the shapes of the adjustment pins A and B, but the adjacent adjustment pieces and the adjustment pins The engagement relationship between A and B is the same as in the previous embodiment.

That is, as shown in FIG. 7A9, the adjustment pin A2 punches out the flat plate material into a predetermined profile, and also punches out the flat material in the thickness direction.
Two protrusions 2j are provided protrudingly, and this protrusion 2j is a fourth protrusion.
By replacing the bent part of the adjustment pin A on the 9th opening in Figure A, it prevents the adjustment piece from wobbling in the thickness direction.

The adjustment pin B3 shown in FIG. 8B is also the same as the adjustment pin A2 except that it has two protrusions 3j in the opposite direction.

With these adjustment pins A and H, an adjustment device as shown in FIG. 6 is obtained.

FIG. 9 shows another embodiment of the present invention in which the adjustment pieces 1 are connected by one adjustment pin C4.

As mentioned above, the present invention provides a watch band in which an adjustment pin is removably attached to the hollow part of an adjustment piece formed by rolling a plate material, in which the adjustment pin is provided with two legs, and the protrusion of the adjustment piece adjacent to the tip of the legs is provided. Since a clamping part is provided to clamp the entire part,
There is no need to provide an embedded core plate as in the prior art, and the pitch of the adjustment pieces can be narrowed by the amount of this core plate.

Further, since the protrusion of the adjustment piece is elastically held by the holding part, the adjustment piece can be reliably connected following the movement of the band.

[Brief explanation of drawings]

Figures 1 and 2 show a conventional embodiment, Figure 1 is a perspective view of the adjustment pieces before they are connected, Figure 2 is a sectional view of the adjustment pieces when they are connected, and Figures 3 to 5 are implementations of the present invention. For example, Figure 3 is a perspective view of the adjustment device, Figure 4A is a plan view of the adjustment pin, Figure 4 is a side view thereof, and Figure 5A is a cross section showing the engagement state of the adjustment pin and adjustment piece. Figure 5 is a side view of Figure 5A, Figures 6 to 8 are the second embodiment of the present invention, and Figure 6A is a cross section showing the engagement state of the adjustment pin and adjustment piece. The opening in Figure 6 is a side view, Figure 7 A is a plan view of the adjustment pin A, and the opening in Figure 7 is the side view.
8A is a plan view of the adjustment pin B, the opening in FIG. 8 is a sectional view taken along B-B in FIG. This is a plan view of 1...Adjustment piece, 1b...Bending part, 1d
...Protrusion, 1e...Concavity, 1g...
...Hollow part, 2, 3...Adjustment pin, 2a, 2
b... Leg, 2f, 2g... Holding part.

Claims (1)

[Scope of utility model registration request] A watch band in which an adjustment piece having a convex portion at one end and a concave portion at the other end is combined with an adjacent adjustment piece, and an adjustment pin is removably locked in a hollow portion of the adjustment piece, and the adjustment piece faces oppositely to the adjustment pin. 2. A watch band length adjusting device, comprising: two feet, a gripping portion provided at the tip of the foot, and the gripping portion being engaged with a bent portion of a convex portion of the adjacent adjusting piece.