JPS5927143Y2 - watch band - Google Patents

Description

[Detailed explanation of the idea] This invention concerns a watch band.

Conventionally, metal bands, which are made of multiple pieces made of stainless steel or the like and connected to each other with connecting pins, have the characteristics of being highly durable and having a metal color similar to that of the watch itself. have.

However, the common disadvantages of most metal bands are that they come in limited colors such as grayish white and gold, that they are relatively expensive and there is little room for cost reduction, and that it is difficult to reduce their weight. Great efforts are being made to try to solve the problem even slightly.

On the other hand, attempts have been made to solve the drawbacks of metal bands by forming watch bands out of plastic. The technical problem is how to solve the problem, and the applicant filed the U.S. Pat.
No. 322 (Utility Model Publication No. 56-13910), Utility Application No. 1973
No. 96323 (Japanese Utility Model Publication No. 56-13911) proposed a means to solve the drawbacks of plastics by increasing the strength of the parts where stress is concentrated.

This idea was developed against the above background, and its purpose is to ensure that almost no external force acts on the outer body and the middle piece even if the outer body and the middle piece are made of a material with low mechanical strength. That is.

Hereinafter, this invention will be explained in detail based on an embodiment shown in the drawings.

In the figure, the reference numeral 1 indicates an outer shell, the reference numeral 2 indicates a middle piece connected to the outer shell 1, and the reference numerals 3 and 4 indicate a metal connecting piece and a metal ring, which will be described later.

The outer shell 1 is made of a suitable plastic having excellent color properties, chemical resistance, moldability, etc., such as polysulfone resin. Notch 11. tl, a fitting hole 12 for fitting the metal connecting piece 3 from the side, and this fitting hole 12.
An engaging part 13 formed on the notch 11 side of the metal connecting piece 3 for adjusting the position of the band in the length direction, and a back surface (third
The curved surface portions 14 and 14 are provided at the lower corner portions in the figure, respectively, and are mass-produced by injection molding or the like.

Like the outer body 1, the middle piece 2 is made of a suitable material such as plastic, and the middle piece 2 has a storage hole 2 on its side surface (end face in the width direction of the band) for storing the metal ring 4.
1.21 and a curved surface portion 22.22 at the corner on the back side thereof, and like the outer shell 1, it is mass-produced by injection molding or the like.

The metal connecting piece 3 is formed by pressing a material, such as a stainless steel plate, that has relatively superior mechanical strength to the outer body 1 and the middle piece 2. A hole 31 penetrating in the thickness direction and the metal ring 4
The structure is such that engaging protrusions 32, 32 are inserted into and spaced apart from each other.

Further, the metal ring 4 is formed by cutting a metal pipe to a length corresponding to the depth of the storage hole 21 of the middle piece 2 and the locking protrusion 32 of the metal connecting piece 3. Protrusion 3
There are metal connecting pieces 3 on the inner peripheral surface of both ends of the connecting hole 410 that engages with 2.
A curved engagement surface 4 rotatably supports the engagement protrusion 32 of the
2.42 is provided.

Incidentally, the reference numeral 50 indicates a closing member which is fitted into the fitting hole 12 of the outer shell 1 to close it, and like the outer shell 1, it is made of a suitable material such as plastic.

A case will be described in which a watch band is assembled using each member configured in this manner (see FIG. 3).

First, a plurality of outer shells 1 are arranged with their notches 11 facing each other, and the metal ring 4 is inserted into the storage hole 21 of the middle piece 2.
Insert it into the notch 11 in a state where it is fitted.

Next, when the metal connecting piece 3 is inserted into the fitting hole 12 of the outer body 1 and pushed in with the part 1 that hits the fitting part 13, both the engaging protrusions 32, 32 of the metal connecting piece 3 are stored in the adjacent middle piece 2. The engaging surfaces 42 of the connecting holes 41 and 41 of both metal rings 4゜4,
42, respectively.

Next, the closing member 50 is fitted into the fitting hole 12 of the outer case 1, the width end of the band is cut if necessary, and the mounting piece and stopper to the watch body are attached.

Since there are many known examples of mounting pieces and fasteners for attaching to the watch body, a description thereof will be omitted here.

In the watch band assembled in this way, when the outer body 1, the middle piece 2, and the closing member 50 are each made of plastic,
As is clear from FIGS. 1 and 2, all parts visible from the outside, such as the front, back, and side surfaces, can be adjusted by changing the color of the plastic.

Also, the assembled watch band is engaged with the metal connecting piece 3.
Also, depending on the metal ring 4, no external force acts directly on the outer body 1 and the middle piece 2.

That is, when an external force is applied to stretch the watch band in the length direction, the engagement protrusion 32 of the metal connecting piece 3 and the engagement surface 42 of the metal ring 4 come into contact, causing the outer body 1 and the inner piece 2 to No external force is applied, so the engagement protrusions 32, 32 of the metal connecting piece 3
It is sufficient if the strength to open the metal ring 4 and the strength to stretch the metal ring 4 is sufficient.

Furthermore, when the watch band is bent in the thickness direction, the contact points are worn due to the friction between the engagement protrusion 32 and the engagement surface 42, but the outer body 1 and the inner bridge 2 are not affected, and the metal connection Piece 3
The metal ring 4 may be made of a metal with excellent wear resistance.

Furthermore, by forming the engaging surface 42 of the metal ring 4 into a curved shape, even if the metal connecting piece 3 is formed by punching or the like, smooth rotational movement can be obtained.

Note that the hole 31 of the metal connecting piece 3 is designed to prevent displacement by inserting the hole 1 into the hole 31 when the inner wall of the fitting hole 12 of the outer body 1 is elastically deformed during fitting. It may be replaced with a protrusion etc. for this purpose.

In addition, in FIG. 3, two metal rings 4 are fitted to the middle piece 2, but one long ring may be fitted.

As is clear from the above explanation, this device has an outer body, a middle piece, etc. made of plastic, and mechanical strength is provided by a metal connecting piece and a metal ring fitted to the outer body and middle piece. Because it is made of plastic, it is possible to dramatically increase the variety of colors and shapes, and each part can be formed by injection molding or press processing of plastic, making mass production possible, and at the same time, easy to assemble and significantly reducing costs. Even if the outer body and middle piece are made of a material with low mechanical strength, the overall strength can be increased by the metal connecting piece and metal ring fitted inside.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; FIG. 1 is a partially omitted plan view, FIG. 2 is a side view, and FIG. 3 is an exploded perspective view illustrating the assembly of parts. 1... Outer body, 2... Middle piece, 3... Metal connecting piece, 4
... Metal ring, 32 ... Engagement protrusion, 41 ... Connection hole, 50 ... Closure member.

Claims (1)

[Scope of utility model registration request] In a watch band in which a middle bridge and an outer body are rotatably connected to each other, a metal ring having a connecting hole is fitted into the middle bridge, and a metal ring having a connecting hole in the metal ring is fitted into the outer body. A watch band characterized in that a metal connecting piece is fitted, and the inner bridge and the outer body are connected by a metal ring and a metal connecting piece, respectively.