JPH07255511A - Watchband buckle structure - Google Patents

Abstract

PURPOSE:To provide a watchband buckle structure with which a metal allergy problem, particularly a nickel allergy problem is not caused and without generation of a problem of a buckle function such as clamping fix and abrasion. CONSTITUTION:In this buckle structure in which a notched part 18 is provided in one end 2b of a back plate, a core member 14 is exposed in the notched part 18, and a locking claw 10 of a front cover 3 is engaged with the exposed locking claw receiving part 11, the locking claw 10 and the locking claw receiving part 11 are made of a material such as titanium, titanium alloy, ferritic stainless steel, austenitic stainless steel, while the material of the locking claw 10 is different from that of the locking claw receiving part 11. Accordingly, the buckle structure having the same function as an ordinary buckle and without causing a metal allergy problem can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clasp structure for a watch band.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a conventional clasp structure. The clasp structure for the clasp type watch band is the attached watch band 30 at the 6 o'clock and 12 o'clock sides of the watch (shown in phantom line).
The watch band itself is divided by engaging and disengaging the engaging members fixed to the tip of the watch band.

Details of the clasp structure for the clasp type watch band are as follows. The system fitting of the watch band mounted on the 6 o'clock side is composed of a back plate 31 that contacts the wrist and a front cover 32 that is rotatably connected to one end of the back plate 31 by a connecting rod. On the lower surface of the other end of the front cover 32, the locking claw 3
Have three. The other end of the back plate 31 is covered so as to hold a part of the outer periphery of the core member 34 covered with the outer piece, and further, the locking claw 33 of the front cover 32 in a state where the front cover 32 is rotated and folded. Engages with and holds a part of the other end of the back plate 31. A core member 37 covered with an outer piece 36 is formed in a mouth shape on the 12 o'clock side engagement tool, and one of the connecting pieces is connected to a watch band 30 (shown by an imaginary line).

The connecting method in the clasp structure constructed as described above is performed after the front cover 32 of the engaging device mounted on the 6 o'clock side is passed through the mouth shape of the engaging device mounted on the 12 o'clock side. , The front cover 32 is rotated and folded. The locking claw 33 provided on the other end of the front cover 32 comes into contact with a part of the other end of the back plate 31, and the front cover 32 is strongly pressed to force the locking claw 33 of the front cover 32. It is elastically deformed, and by its reaction force, the locking claw 33 of the front cover 32 is engaged and held at the other end of the back plate 31. At this time, the front cover 32 and the back plate 3
A space is provided between the two and the 12 o'clock side engagement tool is sandwiched in the space to establish a connected state. To release the connection,
The engagement between the locking claw 33 of the front cover 32 and the other end of the back plate 31 is released by applying a force greater than the elastic deformation of the front cover 32 to the locking claw 33. After disengagement,
When the front cover 32 is rotated, the holding of the engaging tool on the 12 o'clock side is released, and by passing the front cover 32 through the mouth shape of the engaging tool, the watch bands 30 on the 6 o'clock side and the 12 o'clock side are attached. Be divided.

The material used for the clasp structure of the watch band as described above is stainless steel, but in recent years, metal allergies due to nickel, chromium, etc. contained in the material stainless steel have been regarded as a problem. There is. In order to deal with such a problem, a watch band made of a non-nickel-containing metal has been proposed.However, like a clasp for a clasp type watch band, an engaging / disengaging mechanism by elastic deformation of the material itself is used. Among the fasteners, those having sufficient durability have not yet been provided.

[0006]

This is because the locking claw 33 and the back plate 3 for engaging and holding the back plate 31 and the front cover 32.
If the other end of 1 is made of nickel-free metal, fine cracks are likely to occur during processing when molding the other end of the locking claw 33 or the back plate 31. In addition, during engagement and disengagement operation, as described above, since the locking claw 33 is slidably contacted with a strong force that elastically deforms, wear between the locking claw 33 and the other end of the back plate 31 occurs. Due to the repeated bending and bending, there is a problem that the locking claw 33 cannot be clamped and fixed due to fatigue. In particular, the other ends of the locking claw 33 and the back plate 31 are often small pressed pieces that are pressed, so that the locking claw 33 itself may bend and yield before the front cover 32 elastically deforms. In some cases, it was difficult to make the product durable enough to be used as a product.

The present invention solves the above problems and provides a clasp structure for a watch band that does not cause metal allergy problems, especially nickel allergy problems, and does not cause problems such as clasp fixing and wear as clasp function. The purpose is to provide.

[0008]

The constitution of the present invention is as follows. In a clasp structure used for a watch band and having a locking claw and a locking claw receiving part with which the locking claw engages, the clasp includes a clasp body, a locking claw and a locking claw receiving part. The clasp body is made of at least one of titanium, titanium alloy, ferritic stainless steel, and ceramics, and the locking claw and the locking claw receiving portion are made of titanium, titanium alloy, or ferrite. It is made of one material selected from the group consisting of austenitic stainless steel and austenitic stainless steel, and a combination of different materials for the locking claw and the locking claw receiving portion. The locking claw receiving portion includes a core material made of one of titanium, titanium alloy, and ferritic stainless steel, a surface material of austenitic stainless steel covering a part of the surface of the core material, the core material, and the core material. It consists of a back plate that covers the surface material,
A part of the other end of the back plate may be cut out, and the locking claw may engage with the exposed surface material.

[0009]

The combination of the materials of the locking claw and the locking receiving portion reduces wear and fatigue of the locking claw due to repeated bending.

[0010]

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

FIG. 1 is a perspective view showing a clasp structure 1 of a watch band to which the present invention is applied, and FIG. 2 is a sectional view taken along line AA of FIG.

The clasp structure 1 of the watch band includes a 6 o'clock outer piece 15 connected to one end of the 6 o'clock side watch band and a 12 o'clock outer piece 16 connected to one end of the 12 o'clock side watch band. It consists of a 6 o'clock side outer piece 15 connected to one end of the watch band.
Has one end connected to the band body 20 (shown by an imaginary line) (not shown) and the other end covering both outer peripheral portions of the core material 14 held by the back plate 2 in the band lateral direction. Back plate 2 is back plate 2
A front cover 3 rotatably connected to one end 2a of the front cover 3 is connected by a connecting rod 5, and a gap is formed between the back plate 2 and the front cover 3 when the front cover 3 is folded. There is.

The other end 2b of the back plate 2 is connected to the core member 14 connected to the 6 o'clock side band body 20 (shown in phantom line).
The outer periphery of 3 (shown by an imaginary line) is covered and held in an oval shape, and a cutout portion 18 is provided at the center of the other end 2b, and the core material 14 is exposed in the cutout portion 18. One end 2 of the back plate 2
A is connected to a front cover 3 which is rotatably connected by a connecting rod 5, and the other end 3b of the front cover 3 is provided with a core member 14 exposed at the cutout portion 18 when the front cover 3 is rotated. The locking claw 10 that is engaged and disengaged with the locking claw receiving portion 11 is integrally formed.

The twelve o'clock side outer piece 16 covers both outer peripheral portions in the lateral direction of the band of the core material 14 formed by a mouth-shaped plate when viewed from above in an oval shape. Further, both ends in the band longitudinal direction of the core material 14 are a connecting piece 17 and an engaging tool 12, respectively. The connecting piece 17 is connected to the band main body 20 (shown by an imaginary line) on the 12 o'clock side, and the engagement tool 12 is sandwiched between the back plate 2 and the front cover 3 which are fixedly connected to the 6 o'clock side. It has a shape.

The material of the clasp structure 1 of the watch band thus constructed is made of a back plate 2 and an outer piece 1 which come into contact with the wrist or the skin.
5, 16 and the front cover 3 are all made of a material containing an element that does not cause metal allergy, and the core material 14 is made of a material different from the above material. That is, the core material 1
4 is made of austenitic stainless steel (containing nickel), and the other components such as the back plate 2, outer piece 15, and 16 front cover 3 are made of at least one material (titanium, titanium alloy, ferritic stainless steel, or ceramics (nickel). (Not included).

The front cover 3 connected to the back plate 2 is provided with an outer piece 16 mounted on the 12 o'clock side, an engaging tool 12 and a connecting piece 17.
When the front cover 3 is folded and overlapped with the back plate 2 in a state of being passed between the back cover 2 and the back cover 2, the locking claw 10 receives the locking claw receiving portion 11 of the core material 14 exposed from the notch 18 of the back plate 2. The core 14 engages with the locking claw 10 to make a sliding contact with the locking claw 10.

The distance from the connecting rod 5 which is the center of rotation of the back plate 2 and the front cover 3 to the tip 11a of the locking claw receiving portion 11 is set to be slightly longer than the distance from the connecting rod 5 to the tip 10a of the locking claw 10. However, the tip 10a of the locking claw 10 is fixed to the locking claw receiving portion 11
When pushed in along the peripheral surface of the, the tip 1 of the locking claw 10
0a and the locking claw receiving portion 11 are strongly pressed against each other. However, the locking claw receiving portion 11 is different from the material of the locking claw 10 of the front cover 3, and is the same as the thickness of the core material 14 and thinner than the other end 2b of the back plate 2, so that the locking claw receiving portion 11 is locked. The frictional force between the claw 10 and the locking claw receiving portion 11 is small, and therefore wear of the locking claw 10 and the locking claw receiving portion 11 is reduced.

When the locking claw 10 is pushed along the peripheral surface of the locking claw receiving portion 11, a considerable external force also acts on the rising portion of the locking claw 10 formed integrally with the front cover 3, Since the width of the locking claw 10 can be secured over the entire width of the front cover 3, the strength of the locking claw 10 and the front cover 3 as a whole is sufficient, and the locking claw 1 is pressed by the locking claw receiving portion 11.
No cracks, cracks, or plastic deformation occur at 0.

Then, when the locking claw 10 is completely pushed in, the locking claw 10 fits with the peripheral surface of the locking claw receiving portion 10, and the front cover 3 is engaged and held by the back plate 2.

When the front cover 3 and the back plate 2 are disengaged from each other, the locking claw 10 is opposite to the pressed state of the locking claw receiving portion 11, but the mechanical phenomenon occurring at each part is different from that at the time of pressing. It is the same.

3 and 4 show another embodiment of the present invention. FIG. 3 is a perspective view showing a clasp structure of a watch band, and FIG.
FIG.

The difference from the above-mentioned embodiment is the locking claw receiving portion, and the surface material is used as the locking claw receiving portion instead of the core material. Core material 2
2 is made of one of titanium, titanium alloy, and ferrite-based stainless steel, and an austenitic stainless steel surface material 25 is disposed so as to cover a part of the core material 22. It is fixed by the back plate 23. Also,
The other end 23a of the back plate 23 is cut out to expose the surface material 25,
This exposed portion becomes the locking claw receiving portion 21, and the front cover 2
The engaging claws 24 formed on 3 are engaged.

With this structure, the locking claw 2
4 does not cause functional problems such as clasping / fixing force between the locking claw receiving portion 21 and the locking claw receiving portion 21 and abrasion, and the amount of nickel-containing metal used is smaller than that in the first embodiment, so there are less allergic problems. Will be things.

In the above embodiment, nickel-containing metal is used for the locking claw receiving portion, but nickel-containing metal is used for the locking claw and nickel-free metal is used for the locking claw receiving portion. Not to mention good things.

As described above, in each of the embodiments, the portion of the wrist that comes into direct contact with the skin is made of a non-nickel-containing metal to prevent metal allergy caused by wearing the fastener, and the locking claw receiving portion serves as a locking claw. Since they are made of different materials, it is possible to ensure the same functional quality as the conventional stainless steel containing nickel.

[0026]

As described above, according to the clasp structure of the watch band of the present invention, the clasp body and either the locking claw or the locking claw receiving portion are made of a metal not containing nickel. Therefore, the metal allergy problem due to nickel does not occur even when the watch band using Nakadome of the present invention is worn on the wrist. Moreover, the function as Nakadome is also equivalent to the conventional product, and there is no problem in use. In this way, it is possible to provide a clasp structure for a watch band that is gentle on the skin and has sufficient functional quality.

[Brief description of drawings]

FIG. 1 is a perspective view showing a clasp structure of a watch band according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a clasp structure of a watch band according to another embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a perspective view showing a clasp structure in a conventional example.

[Explanation of symbols]

 1 watch band clasp structure 2 back plate 2a back plate one end 2b back plate other end 3 table cover 3a table cover one end 3b table cover other end 5 connecting rod 6 clasp body 10 locking claw 10a locking claw Tip 11 of locking claw receiving portion 11a tip of locking claw receiving portion 12 engaging tool 13 connecting rod 14 core material 15 6 o'clock side outer piece 16 12 o'clock side outer piece 17 connecting piece 18 notch portion 20 band body 21 locking Claw receiving part 22 Core material 23 Back plate 23a Other end of back plate 24 Locking claw 25 Surface material

Claims (2)

[Claims] 1. In a clasp structure used for a watch band and having a locking claw and a locking claw receiving part with which the locking claw engages, the clasp is composed of a clasp main body and a locking claw. The retaining clasp receiving portion, the clasp body is made of at least one of titanium, titanium alloy, ferritic stainless steel, and ceramics, and the retaining claw and the retaining claw receiving portion are made of titanium. A clasp structure for a watch band, which is made of one material selected from a group consisting of titanium alloy, ferritic stainless steel, and austenitic stainless steel, and a combination of different materials of the locking claw and the locking claw receiving portion. 2. The core member made of one of titanium, titanium alloy, and ferritic stainless steel, and the austenitic stainless surface member covering a part of the surface of the core member, and the core. It is comprised from a backing material and a back plate that covers the front material, a part of the other end of the back plate is cut out, and the locking claw engages with the exposed front material. The clasp structure of the watch band according to Item 1.