JPS635540Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wristwatch case with a band integrally combined with a synthetic resin band.

As a conventional watch case with this kind of band,
For example, as shown in Japanese Utility Model Application Publication No. 52-417465, an opening is formed in the center of a band body made of a flexible resin material, and a hard watch body made to accommodate the watch body is formed in the opening. A case made of material is housed, and an outwardly projecting ridge is formed on the outer surface of the case, and each of the ridges has at least one ridge at a position corresponding to both longitudinal sides of the band body.
through-holes are formed, while grooves into which the protrusions bite are formed on the inner wall surface of the opening of the band main body,
There is a wristwatch band in which the material of the band body is filled in the through hole so as to be integrally continuous with the two opposing wall surfaces of the groove.

With this structure, when the band body is pulled in its longitudinal direction or bent to be worn on the arm, part of the band body fills the through hole provided in the protrusion of the case, so the case This design has been devised so that there is no gap between the strap and the opening of the band body, so as not to detract from the aesthetic appearance of the wristwatch.

As described above, while the above-mentioned conventional watch band has been improved against tension in the longitudinal direction of the band body by using the through hole in the case, it has also been shown that the band body has a through hole that continuously protrudes in the circumferential direction of the outer circumferential surface of the case. Because the case and the band body are connected by the protrusion and the groove formed so that the protrusion bites into the inner peripheral wall of the circular opening of the band body that houses the case, the following problems occur. There is. In other words, the central part of the band body must be wide and thick enough to bury the protrusions that protrude around the entire circumference, making it difficult to create slim watches that require a smart design. becomes unsuitable. In particular, the widening of the central part of the watch case that covers the protrusion located between 3 o'clock and 9 o'clock goes against the so-called narrower edges and becomes a hindrance in terms of design, resulting in the current thin and small watches. Unable to meet needs. In addition, the amount of resin material consumed increases, resulting in high costs.Furthermore, when the band body is injection molded, the periphery of the opening in the center from 3 o'clock to 9 o'clock is extremely narrow, which causes the flow of molten synthetic resin. The large resistance makes it difficult for the resin material to flow sufficiently, resulting in problems of molding defects such as weld lines, sink marks, and discoloration.

This invention was made in view of the above circumstances,
The integrated structure of the watch case and band eliminates band molding defects, and also improves the design.
The entire watch case can be made into a slim shape, and with bands attached individually to both ends of the watch case in the band direction, the force acting in the direction of the band, the force acting in the direction of curvature when worn on the wrist, or the plane circumference It can fully handle tearing due to directional force,
To provide a wristwatch case with a band that prevents a gap from forming at a joint between the wristwatch case and the band and prevents the band from separating from the wristwatch case.

As a means for solving the above-mentioned problems, the wristwatch case with a band according to the present invention has a neck part with a through hole bored at both ends in the band direction of the wristwatch case made of a hard resin material, and a tip part of the neck part. A protrusion is integrally formed with a protrusion having a locking surface that extends outward perpendicularly to the protrusion, and is made of a soft resin material and has a shape that fits the joints at both ends of the watch case in the band direction, and The band is formed by burying the protrusions.

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

Figure 1 is a longitudinal sectional view of the main part of the connection between the watch case and the band, Figure 2 is a partially cutaway plan view,
FIG. 3 is a perspective view of the wristwatch case.

A is a watch case made of hard synthetic resin.
Projections 2 are formed integrally and protrudingly from the same material at both ends of the body 1 in the band B direction. This protrusion 2 is the through hole 2
It consists of a neck 2a with a hole 2a and a protrusion 2b having a locking surface 2d extending outward perpendicularly to the tip of the neck 2a. When drilling the through hole 2c, in addition to drilling one hole in the center of the neck as in this example, or drilling multiple holes from the upper surface to the lower surface of the neck 2a (in the thickness direction of the band). You can. This through hole 2c is connected to band B, which will be described later.
When forming the watch case A and the band B, the soft resin material of the band flows in and connects the front and back of the band to form the watch case A and the band B.
strengthens the bond between Further, the locking surface 2d is formed to face the end surface of the wristwatch case A in the band direction. Therefore, this locking surface 2d prevents the band from separating from the wristwatch case when pulled in the direction of the band B, and also acts effectively against forces in the planar circumferential direction without being torn. Furthermore, the locking surface 2d slightly protrudes from the neck portion 2a in the thickness direction of the band, thereby reinforcing the band against tension.

Next, band B is formed using a mold of soft rubber or synthetic resin, and matches the shape of the periphery of the protrusions 2 of watch case A by embedding the protrusions 2 at both ends of case A, which is made of hard synthetic resin. As shown in the illustration, the watch case and band are finished as one piece. The tip end is formed to be elongated and gradually thinner like a conventional band. Then, a fastener (three-fold metal fitting) is fixed to the band, or a small hole is attached to one side, and a buckle is attached to the other band.

As can be seen from the above description, the present invention consists of a neck part with a through hole formed at both ends in the band direction of a wristwatch case made of a hard resin material, and a locking part that extends outward perpendicularly to the tip of the neck part. Since the protrusion and the protrusion having a surface are integrally formed, the band is transparent against tearing caused by the pull of the watch case in the direction of the band, the force acting in the curved direction when worn on the arm, or the force in the planar circumferential direction. The connection effect of the soft resin material filled in the hole and the engagement effect of the soft resin material on the locking surface extending outward perpendicularly to the tip of the neck combine to create a connection between the watch case and the band. This has the unique effect of eliminating the occurrence of gaps and separation at the joints.

In particular, the locking surface has sufficient resistance against tension and peeling that concentrates on the end of the band's joint end surface, and as in the past, the entire circumference of the watch case and the band opening are integrally joined. There is no need,
It has the excellent effect of maintaining high bondability over a long period of time.

In addition, since the band is attached individually and integrally to both ends of the watch case in the band direction, the problem of molding defects that conventionally occurred at the center of the band that accommodates the watch case can be completely eliminated. becomes.

Furthermore, it has the advantage of being able to have a slim design and being manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a partially cutaway plan view thereof, and FIG. 3 is a perspective view of a wristwatch case. A...Watch case, B...Band, 2...Protrusion, 2a...Neck, 2b...Protrusion, 2c...Through hole, 2d...Locking surface.

Claims (1)

[Scope of utility model registration request] A protrusion consisting of a neck with a through hole and a protrusion having a locking surface that extends outward perpendicularly to the tip of the neck is integrated into both ends of the watch case made of a hard resin material in the band direction. What is claimed is: 1. A wristwatch case with a band, characterized in that the band is formed of a soft resin material in a shape that fits the joints of both ends in the band direction of the wristwatch case, and that the projections are buried.