JPH0618314Y2 - Portable watch case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a case for a portable watch.

(Prior Art) There are some wristwatches and the like in which a glass packing is provided with a color corresponding to the color tone of the body to give design variety.

This kind of watch is found in a relatively expensive watch with crystal glass fitted in a metal case, so let's apply this kind of design to an inexpensive watch with an acrylic windshield fitted in a resin case. However, since the windshield and the body are bent due to the strength of the resin, for example, the actual open sho 58-5799.
As with the timepiece case disclosed in Japanese Patent Publication No. 1, the problem arises that the case cannot be provided with the required waterproofness unless another packing is interposed.

(Purpose) The present invention has been made in view of the above problems, and it is an object of the present invention to provide a required mounting strength and a required waterproof property by using a decorative ring such as a kind of luxury watch. It is to provide an inexpensive portable watch case.

(Means for Achieving the Purpose) That is, the present invention is, as a case of a portable timepiece for achieving the above object, a windshield mounting step portion and a parting portion with a chamfered portion inclined to the upper inner peripheral surface. To the body made of synthetic resin, fit the decorative ring made of synthetic resin with the inner peripheral surface formed into a reverse taper shape, the surface contacting these cutouts and chamfers on the outer circumference, and further inside the decorative ring, A synthetic resin windshield is fitted along the reverse tapered inner peripheral surface, and the windshield and the decorative ring are integrally welded to the upper inner peripheral surface of the case by high frequency.

(Embodiment) Therefore, the details of the present invention will be described below based on an illustrated embodiment.

The drawings show an embodiment of the present invention. A body 1 made of a synthetic resin material is provided with a glass mounting step portion 2 and a parting portion 3 on an inner surface thereof, and a corner where these are in contact with each other. An inclined chamfer 4 is formed on the portion.

On the other hand, the outer peripheral surface of the parting portion 3 is the parting portion 3 and the chamfered portion 4.
The decorative ring 5 is attached so as to come into contact with the. The decorative ring 5 is made of a transparent synthetic resin material having a color corresponding to the color tone of the body 1, and the inner peripheral surface 6 thereof is formed in an inverse tapered shape. However, the windshield 8 made of an acrylic resin material or the like is fitted therein with its lower surface 9 in contact with the discretionary step portion 2.

Then, the decorative ring 5 is fitted on the inner surface of the upper portion of the body 1 configured as described above, and the windshield 8 is fitted along the tapered inner peripheral surface 6 of the decorative ring 5, and the windshield 8 and the decorative ring 5 are also fitted. When is welded to the upper inner peripheral surface of the body 1 by high frequency, heat is concentrated on the edge portion of the decorative ring which is in contact with the corners of the parting portion 3 and the chamfered portion 4, and the decorative ring 5 heated around this portion is used as the center. The surface of is melted so that a part of it flows down the chamfered portion 4 which is inclined, and is welded to the body 1 without a gap, while the windshield 8 has its wide lower surface 9 in close contact with the mounting step portion 2. Airtightly weld these windshield 8 and decorative ring 5
As described above, according to the present invention, the chamfered portion inclined to the upper inner peripheral surface of the cylinder is provided. By forming the windshield mounting step and the parting part, and the decorative ring and the windshield are welded together by high frequency here, heat concentration is generated at the edge part of the decorative ring in contact with the parting part and the chamfer, With this portion as the center, the surface portion of the melted decorative ring is made to flow down to the inclined chamfered portion and completely welded and integrated to the inner peripheral surface of the body, and at the same time the wide bottom surface is used to attach the windshield to the body mounting step. The windshield and the decorative ring can be air-tightly joined to the upper inner peripheral surface of the case without needing a member such as packing by welding them without any gap.

Moreover, since the resin windshield is fitted to match the reverse tapered inner surface of the decorative ring, it is firmly fixed to the body by the decorative ring while absorbing the flexure of the windshield. By hiding a part of the welded bottom surface of the windshield, this type of watch case can be given a slender appearance as if it were a luxury watch.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of a portable watch case that constitutes an embodiment of the present invention. 1 ... Body, 2 ... Mounting step 3 ... Cut-off part, 4 ... Chamfer part 5 ... Decorative ring, 8 ... Windshield

Claims (1)

[Scope of utility model registration request] 1. A body made of a synthetic resin having a windshield mounting step and a parting part with an inclined chamfered part on the inner surface of the upper part, and a surface contacting the parting part and the chamfered part on the outer periphery. , A decorative ring made of synthetic resin having an inner peripheral surface formed in a reverse taper shape was fitted, and a synthetic resin windshield was fitted inside the decorative ring along the reverse tapered inner peripheral surface. A case of a portable timepiece characterized in that the windshield and the decorative ring are integrally welded to the upper inner peripheral surface of the case by high frequency.