JPH0417044Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an endless retaining ring for a band, particularly a slip ring for a watch band.

[Prior Art] Conventionally, a retaining ring for a band, such as a sliding retaining ring for a watch band, has been formed by making an endless piece of leather or a material similar to leather, with both transverse ends folded back toward the inner circumferential side, and then glued together. It is something to do.

``The problem that the invention attempts to solve'' For this reason, in the construction process, the work must actually be done exclusively by hand, which takes a lot of time, and the quality of the retaining ring is poor. The reality is that it was largely influenced by the skill of the person manufacturing the rings.

In addition, in the above-mentioned retaining ring, both ends in the transverse direction are folded back and glued to the inner circumferential side where the band is inserted, so when the band is inserted into the retaining ring, the ends come into contact with each other. It is easy to cause damage such as peeling.

However, since the back side of the leather is directly exposed on the inner peripheral surface side, the adhesive strength is easily deteriorated and damage is caused by moisture.

The purpose of this invention is to achieve high durability over a long period of time without degrading adhesive strength or decreasing durability even in the presence of moisture even if the band is inserted into the retaining ring many times. An object of the present invention is to provide a retaining ring for a band ring.

``Means for Solving the Problems'' The present invention consists of a partially open outer cover 3 made of leather or leather-like material, and a hollow part formed inside the outer cover 3 made of an elastic plastic material. A flexible ring-shaped support is integrally filled, and the exposed area of the support that is not covered by the outer cover, in other words, the surface of the support exposed on the inner peripheral side, is the exposed surface of the outer cover 3. In other words, it is characterized by being formed in substantially the same plane as the ring-shaped end portion 3a.

"Function" If formed in this way, the inner circumferential surface, which is the acting surface that gives a damaging effect when the band is inserted into the retaining ring, will be formed flush. The step formed between the two is removed.

In addition, since the outer cover is formed integrally with the support,
The moisture ingress side edges of the jacket made of leather or leather-like material, which are susceptible to moisture damage, are protected by the material of the support.

However, since the outer cover is filled with a plastic support, there is no cavity like in the conventional technology, and the plastic support is filled in the exposed part of the leather lining. Furthermore, since the opening on the inner circumference side is also sealed with a plastic support, it is possible to completely prevent moisture from entering.

In a clasp constructed according to the invention, the ring-shaped support serves to ensure the stability and form of the clasp, in particular the sliding clasp, and for this purpose consists of a leather or leather-like material. The outer shell has a less important role with respect to the form and safety of the clasp than traditional adhesive clasps.

The retaining ring according to the present invention can be used not only as a sliding retaining ring mounted on a band, but also as a fixed retaining ring disposed on the buckle of a band.

In one embodiment of the invention, the jacket is provided on the outer surface of the ring-shaped support, and the longitudinal edge region of the jacket extends at least partially along the ring-shaped edge of the ring-shaped support. go around. In this case, it is preferable that the outer cover extends around the inner peripheral surface of the ring-shaped support.

In addition, the manufacturing process of the retaining ring (sliding retaining ring) according to the present invention is such that the ring-shaped ends of the outer cover made of leather or a material similar to leather are arranged on the inner peripheral surface of the ring-shaped support at a distance from each other. By doing so, it becomes possible to easily fill the spaced portion with the elastic plastic material, and the manufacturing thereof becomes extremely easy.

Furthermore, since the spaced apart portion of the outer cover (the exposed area of the ring-shaped support) is formed inside the retaining ring, it is hidden from the outside and does not pose a disadvantage or hindrance to the design, which is preferable.

The ring-shaped support is internally and integrally formed within the cavity by injection molding of a plastic material forming the ring-shaped support using the opening of the outer cover, as described later. This can be easily achieved by filling with

This eliminates the need for a special process for joining the ring-shaped support and the envelope.

When the retaining ring according to the present invention is manufactured by injection molding, the feature of the present invention that the exposed area of the ring-shaped support that is not covered by the outer cover is in the same plane as the circumferential surface of the outer cover can also be easily realized. .

Embodiments Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The drawing shows a sectional view of a sliding clasp forming a watch band, the sliding clasp 1 comprising a ring-shaped support 2 and an outer jacket 3 that partially covers the surface of the ring-shaped support 2. Ru.

The jacket 3 can be made from leather or a leather-like material.

In the illustrated embodiment, the outer jacket 3 extends around the inner peripheral surface 4 of the ring-shaped support 2.

Further, the ring-shaped ends 3a of the outer cover 3 are placed on the inner circumferential surface 4 of the ring-shaped support 2 so as to be spaced apart from each other. Furthermore, as is clear from the drawing, the exposed area 7 of the support 2 which is not covered by the material of the jacket 3 lies in the same plane as the outer surface of the jacket 3 and thus forms a sliding retaining ring 1 according to the invention. It is formed on the same surface with no steps between the various materials. This applies in particular to the abutment area between the ends of the jacket 3 that are perpendicular to the ring-shaped edge 6 of the ring-shaped support 2.

The sliding retaining ring 1 according to the invention is preferably manufactured by an injection molding method, for example by inserting a blank made of leather or leather-like material into which the ring-shaped support 2 is later formed into a concealing shape. It can be manufactured by forming it in a suitable mold in which a cavity of the same shape is formed, and placing this together with the elastic plastic material forming the ring-shaped support 2 in an injection mold. In this step, the material of the support 2 is transferred from the opening 7 to the envelope 3 corresponding to the exposed area.
When the outer cover that is inserted into the support and comes into contact with the support is made of leather, the contact surface is the fiber side or the meat side, so that the two materials are reliably joined on the inside.

A particularly suitable material for the ring-shaped support 2 is a flexible, preferably elastic material such as polyurethane elastomer, polyethylene ionomer, or LD-PE (low density polyethylene).

``Effects'' As described above, according to the present invention, even if the band is inserted into the retaining ring many times, the adhesive strength will not deteriorate or the durability will decrease even in the presence of moisture, and the band will remain high over a long period of time. It is possible to obtain durability.

It has various effects such as

[Brief explanation of the drawing]

The drawing is a cross-sectional view of an embodiment of the invention used as a sliding retainer.

Claims (1)

[Claims for Utility Model Registration] In a cavity formed inside an outer cover 3 made of leather or a leather-like material with a partially opening 7, a flexible case made of an elastic plastic material is provided. It consists of a retaining ring for a band that is integrally formed by filling the ring-shaped support 2, and allows the outer cover 3 to go around up to the inner peripheral surface 4 of the ring-shaped support 2. The ring-shaped end portions 3a are arranged spaced apart from each other across the exposed region 7 of the inner peripheral surface 4 of the ring-shaped support, and the exposed region of the support 2 on the inner peripheral surface side is connected to the ring-shaped end portion 3a of the outer cover 3. A retaining ring for a band ring, characterized in that it is formed in the same plane as the end portion 3a.