JPS6397Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a stopper for a watch band.

Conventionally, as an example of a stopper used for a metal watch band, etc.
There is a metal fitting to prevent it from folding. These fasteners are attached between one band piece and the other band piece so as to connect them, and the plate-like members that are rotatable with each other via the hinge part are overlapped, so that the watch can be used as a clock. And the band attached to the watch is fixed to the wrist, etc.

By the way, in the above-mentioned two-piece bending fitting or three-piece bending fitting, an elastic protrusion formed by cutting and raising a part of a plate-shaped member is usually formed by opening a hole in the other plate-shaped member which is superimposed on the upper side of the same plate-shaped member. In the hole where
By being fitted together or by engaging the locking part with a bite provided at the end of the trifold upper box with the hinge pin that connects the plate-like members,
The overlapping state is maintained.

However, when it comes to the above-mentioned fasteners,
Since the locking member itself is configured to be able to be connected to and released from the other member by utilizing the elasticity of the locking member itself, such as the elastic protrusion or the bite portion of the trifold upper box, the lock may be released when an impact is applied. After repeated engagement and disengagement, problems such as plastic deformation and elastic fatigue of the locking member occurred.

The present invention was developed in view of the above circumstances, and its purpose is to provide a watch band fastening fitting that can securely lock the watch band and maintain its locking function stably over a long period of time. do.

Hereinafter, the present invention will be explained with reference to FIGS. 1 to 3. The fastener according to the present invention includes a bottom plate 1 connected to one band piece _A1 , and a connecting member connected to the other band piece _A2 . 2, a bifold metal fitting 5 formed by connecting an upper plate 3 via a hinge part 4 so as to be rotatable, a first locking part 6 provided on the upper part of the bottom plate 1, and the connecting member. The basic structure consists of a rotating body 7 attached to the rotary body 2, and a second locking part 8 that is attached to the rotating body 7 and is engaged with and released from the first locking part 6.

The bottom plate 1 includes a main part 9 curved to have substantially the same curvature as the wrist, and each piece a ₁ provided at one end of the main part 9 and forming band pieces A ₁ and A ₂ .
and a sub-portion 10 formed in substantially the same shape as the one band piece _A1 , and the one band piece A Connected to _A1 . Main part 9
The first locking part 6 is formed by cutting and raising a part of the main part 9 at one end side (the side of the sub part 10). This first locking portion 6 includes a first flat plate 12 extending perpendicularly from the main portion 9 as shown in FIG.
A second plate extending perpendicularly from the tip of the first flat plate 12
and a flat plate protrusion 14 extending orthogonally from the tip of the second flat plate 13 toward the main portion 9 side.

The length l ₁ of the upper plate 3 is set shorter than the length I ₂ of the main portion 9, and when the upper plate 3 is superposed on the bottom plate 1, the rotation body 7 and the first engagement The stop portion 6 is arranged to face the stop portion 6.

The connecting member 2 is connected to the other band piece A ₂ via a pin 15 arranged to extend in the width direction of the band piece A ₂ .
It is connected to the upper plate 3 via a pin 16 arranged parallel to the upper plate 5 .

The rotating body 7 connects the band pieces A ₁ to the arms 2a, 2a provided on the connecting member 2 via pins 17.
It is rotatably connected in the longitudinal direction of _A2 . A half circumferential portion of the rotating body 7 is knurled, and on the opposite side of the knurled portion 18, a notch 19 is formed by cutting out a predetermined angle in the circumferential direction. From one side of the notch 19, the second plate is formed of a flat plate 20 extending perpendicularly from the same side and a flat plate protrusion 21 extending perpendicularly from the flat plate 20.
A locking portion 8 is provided. Further, a bulging cam portion 7a is provided on the outer peripheral portion of the rotating body 7, and when the first and second locking portions 6 and 8 are in an engaged state, the cam portion 7a abuts against the sub portion 10. , to prevent rotation of the rotating body 7.

Further, as shown in FIG. 3, when the first locking part 6 and the second locking part 8 are in an engaged state, there is a gap between the upper end of the first locking part 6 and the rotating body 7. , and the respective gaps m ₁ formed between the lower end of the second locking portion 8 and the bottom plate 1 are determined by the amount of protrusion of the flat plate protrusions 14 and 21.
_m2 , and both locking parts 6 and 8
Mutual engagement and disengagement can be performed without any problem.

In addition to the illustrated example, the first locking part 6 and the second locking part 8 can be locked by urging the rotating body 7 to rotate in the direction of the arrow Y in the figure using a spring or the like. It may be possible to do this more reliably. In that case, it is preferable to provide a stopper so that the rotating body 7 does not rotate in the Y direction more than a predetermined amount.

Next, the usage and operation of the watch band fastener having the above structure will be explained.

When wearing the watch and the band that is integrally attached to it on your wrist, etc., use band piece A ₂ .
The upper plate 3 is folded over the bottom plate 1 by holding the upper plate 3 and the rotating body 7 is opposed to the first locking part 6. Next, with the connecting member 2 pressed downward, the rotating body 7 is rotated in the direction of arrow Y in FIG. 3 to make the second locking part 8 face the first locking part 6, and the connecting member Release the downward pressure in step 2. Then, the connecting member 2 moves upward due to the elastic action of the upper plate 3, and as a result, the third
As shown in the figure, the first locking part 6 and the second locking part 8
and are engaged. In this state, even if an impact is applied, the engagement state will not be released unless the rotating body 7 is rotated, and the top plate 3 and bottom plate 1 will not be disengaged.
The folded state is maintained.

In addition, when removing the stopper, press the connecting member 2 downward and move the rotating body 7 in the direction of the arrow X.
The first locking portion 6 and the second locking portion 8 may be disengaged from each other by rotating in the direction shown in FIG.

As explained above, according to the present invention, a first locking portion is provided on the bottom plate, a rotating body is provided on the connecting member superposed above the first locking portion, and the rotating body is provided with the first locking portion. The second locking part is engaged with and released from the first locking part.
Since the configuration is provided with a locking portion, the elasticity of the locking portions themselves can be used to engage the first locking portion and the second locking portion, as shown in the conventional example. Rather, the engagement can be performed by rotation of the rotating body, and the engagement can be performed reliably. Further, the locking portion does not undergo plastic deformation or elastic fatigue, and its locking function can be stably exhibited over a long period of time. Further, the first and second locking portions can be aligned with each other by the bifurcated metal fittings, and this has advantages such as excellent operability when attaching the band.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a perspective view, Figure 2 being a sectional view showing the engaged state, and Figure 3 being an enlarged cross-section indicated by the arrow in Figure 2. It is a diagram. A ₁ ... One band piece, A ₂ ... Other band piece, 1 ... Bottom plate, 2 ... Connection member, 3 ... Top plate,
4... Hinge part, 5... Bifold metal fitting, 6... First locking part, 7... Rotating body, 8... Second locking part.

Claims (1)

[Scope of utility model registration request] A bottom plate connected to one band piece, and an upper plate superimposed on the bottom plate and connected to the other band piece via a connecting member, which are rotatably connected by a hinge part. a bendable metal fitting, a first locking portion is provided at the upper end of the bottom plate and connected to the one band piece;
A rotating body is attached to the connecting member, and the rotating body is provided with a second locking part that is engaged with and disengaged from the first locking part as the rotating body rotates in forward and reverse directions. A watch band clasp featuring: