JPS5847851Y2 - Fitting structure of watch case and band - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the fitting of a watch case and a band, and more specifically, to provide a fitting structure of a watch case and a band that fixes the band to the watch case so as to form a sense of unity.

Generally, this type of structure is as shown in Figure 1.
The spring bar holder 14 is made to protrude from the back surface 212 of the band, and the spring bar 13 is passed through the spring bar holder 142 which has a space for holding the spring bar between it and the back surface of the band, and the spring bar is attached to the gun 17 of the watch case. It was engaged and the band was attached to the watch case.

However, in this structure, since the band 12 rotates around the spring bar, the locking claw 151 of the holding claw body 15 having elasticity at the corner formed by the body side surface 111 and the body surface 112 is attached to the spring bar holder 14. By rotating and elastically engaging the support plate 141 of the gun 17 as a fulcrum, welding either or both of the back side of the band to the band receiving surface 171 of the gun 17 and the band tip 122 to the body side 111 of the gun 17. It was designed to prevent rotation.

In the above structure, there is a limit to the miniaturization of the holding claw body 15 due to the structure that imparts elasticity to the holding claw body 15, and the attachment of the band is a hindering factor.

Furthermore, during the process of being press-fitted, the locking claw tip 152 often came into contact with the slope 161 of the back cover 16 of the watch case, causing damage.

Furthermore, the spring bar 13 must be attached and detached each time the band is attached or detached, and accidents such as loss of the spring bar or repeated attachment and detachment of the spring bar may cause the locking part of the spring bar to loosen, causing the spring bar to come off while being carried. There were drawbacks.

This invention was devised to solve the above-mentioned drawbacks, and when attaching and detaching the band to the watch case, the spring bar is attached to the watch case, which means that the band can be attached without having to attach or detach the spring bar. To provide a band fitting structure that does not damage the slope of the back cover and is compatible with the miniaturization and thinning of watches.

Hereinafter, the present invention will be explained in detail based on an embodiment shown in FIG. 2 and below.

FIG. 2 is an assembled sectional view of the present invention, showing the fixing collar 24 protruding from the back surface 221 of the band.

This fixed collar 24 is formed by bending a plate material as a separate part.
It is fixed to the back surface 221 of the band by spot welding or brazing.

The fixed jaw 24 includes a jaw tip 242 that abuts against the body surface;
It has a locking claw contact portion 243 on which the locking claw wedge portion 251 of the locking claw body 25 acts.

The watch case has a well-known structure in which a spring bar 23 is attached to a pair of scissors 27 that protrude from the side surface of the case.

However, once the spring bar 23 is attached to the gun 27, it is not necessary to remove it again, but it is of course possible to remove it.

The top surface 271 of the gun of the watch case 21 is the back surface 221 of the band.
The locking claw wedge portion is attached to the gap H between the spring bar 23 and the locking claw contact portion 243, which is formed by abutting the band tip 222 against the body side surface 211 and the jaw tip 242 against the body surface 212. By pushing the locking claw wedge portion 251 into the gap H so that the plate thickness t of the spring bar 251 satisfies t>H, the spring bar 23 is bent in the direction P shown in FIG.

As a result, a reaction force is received via the locking claw wedge portion 251 in a direction opposite to the direction P of deflection of the spring bar 23, and the band tip 2
22 to the trunk side 211, and the jaw tip 242 to the trunk surface 212.
By pressing, the watch case 21 and the band 22 are completely combined so that they have a sense of unity.

Therefore, the band tip 222, the jaw tip 242 and the gun 2
Since there are support points at three points, 7 and the spring rod 23, even if the band bends and deflects, the force at the band attachment part is balanced and does not rotate.

Next, to explain in detail how to attach and detach the band, first, the watch case 21
Attach the spring bar 23 to the gun 27 as shown in FIG.
1 and the spring bar 23, and as shown in FIG.
Hit 12.

Then, the locking claw wedge portion 251 of the locking claw body 25 is press-fitted into the gap H between the locking claw contact portion 243 of the fixed jaw 24 and the spring bar 23, and the band 22 is attached to the watch case 2 as shown in FIG.
Attach it to 1.

To remove the locking claw body 25, use a jig or the like to pull out the locking claw wedge portion 251 from between the locking claw contact portion 243 of the fixed collar 24, and then insert the tip portion 242 of the fixed collar 24 into the watch case. Remove it by passing between the body side 211 of 21 and the spring bar 23.

At this time, the spring bar 23 is not removed from the gun 27 of the watch case 21.

Note that the locking claw 25 can be satisfied as long as it exists even if the locking claw wedge portion 243 is independent of the fixed jaw 24 or the band 22 as a requirement of the fitting structure, but there is a possibility that it may be lost during the attachment/detachment operation. Therefore, in this embodiment, the locking claw retaining plate 2 has the fixed jaw 24 extended and bent as seen in the conventional structure.
It is rotatably attached to 41.

In addition, in the structure shown in FIG. 1, as mentioned above, the locking claw tip 152 often came into contact with the back cover slope 161 during operation and caused scratches, but the locking claw of the present invention 26
Since the structure does not allow contact with the slope 261 or the body side 211, there will be no scratches.

Furthermore, the locking claw body 25 does not utilize elasticity;
Since the locking claw wedge portion 251 only needs to act as a wedge, the portions other than the locking claw wedge portion 251 need only be able to connect the wedge portion, and can be miniaturized.

As described above, in the present invention, the locking claw is press-fitted between the spring bar and the wall of the bent end of the fixed jaw, which faces the spring bar. Support points are obtained at three points, and this allows the force meter of the band attachment part to be balanced, there is no movement such as rotation of the band attachment part, and the case and band are completely fixed so that there is a sense of unity. , the band can be easily attached and detached with the spring bar still attached to the watch case, and this eliminates the possibility of the locking part loosening due to loss of the spring bar or fatigue of the spring due to repeated use of the spring bar. This does not occur, and the accident of dropping the watch due to the spring bar becoming dislodged can be prevented.

In addition, since the locking pawl does not come into contact with the watch case parts, there is no unnecessary scratches on the watch case, and since the locking pawl has a wedge-like structure, the locking pawl can be kept to the minimum necessary size. It has many effects, such as being able to be pressed down and being suitable for use in thinner and smaller watches.

[Brief explanation of drawings]

Claims (1)

[Scope of utility model registration request] The band is attached by attaching a watch case body having a pair of guns formed protruding at certain positions, a spring bar attached to the guns, and placing the lower surface on the top surface of the pair of guns, and pushing the tip toward the side of the watch case body. In the band fitting structure for fixing the band to the watch case so as to form a sense of unity, the lower surface of the tip of the band has a hole that passes between the spring bar and the side surface of the watch case body. fixing a fixed collar having a bent end portion that engages with the back surface of the watch case body;
A locking pawl is press-fitted between the spring bar and the wall of the bent end of the fixed collar facing the spring bar to maintain the band tip in contact with the side surface of the watch case without any gaps. The fitting structure of the watch case and band.