JPS594307Y2 - mobile watch case - Google Patents

Description

[Detailed description of the invention] This invention is a portable watch case that uses a polymeric material that can be manufactured at low cost, and that has a metal texture that is different from the conventional case with a medium-high edge height. The purpose is to ensure quality.

In conventional cases with medium and high edge heights, the case material is stainless steel or copper alloy.

These general processing methods generally include plastic processing using a press, cutting, and polishing from the stainless steel material or copper alloy material having a plate thickness of 5 to 1Q mm.

Moreover, during press working, a cycle of work hardening by pressing, tempering by heat treatment, cleaning and press working is usually repeated 8 to 12 times to create the desired design shape of the case.

Further, in the cutting after the plastic working step using a press, threading of the fitting part with the back cover and cutting for mounting the movement are added.

As described above, this is the reason why today's case manufacturing is extremely labor-intensive and expensive.

This invention changes the conventional processing, reduces man-hours, enables manufacturing at low cost, increases production efficiency, and maintains the metal texture and quality of the case that is provided with conventional medium and high edge heights. It is something to do.

Examples of the present invention will be described below.

FIG. 1 is a partial sectional view of a portable wristwatch showing an embodiment of the present invention.

FIG. 2 is a partial three-dimensional view of the trunk 1 shown in FIG. 1.

FIG. 3 is a partial three-dimensional view of the Urabuta 2 shown in FIG. 1.

The outer shell 3 is made of a metal member such as stainless steel or copper alloy, and is a thin plate with a thickness of 0.3 to Q, 5 mm, and is located on the outer surface of the body 1.

The processing method is drawing of thin plate material, and press processing is 3-4
It is formed in times.

The inner shell 4, like the outer shell 1a, is made of a 0.3 to 5 mm thin member made of stainless steel, blended metal, etc., and is formed by press molding three to four times.

The outer shell 3 and the inner shell 4 are made of thin plate materials, and work hardening by press working eliminates the need for baking treatment to remove strain caused by work hardening during repeated press working, reducing the number of times conventional press working is required. This eliminates the heat treatment process.

Further, the body 5 located between the outer shell 3 and the inner shell 40 is made of a highly rigid polymeric material such as phenol or Rydon, and the outer shell 3 and the inner shell 4 are processed by injection insert molding, and the outer shell 3 is , the inner shell 4, and the barrel 5 constitute a barrel 1 that is integrally formed.

Convex claws 4 with at least two force points on the lower outer layer of the inner shell 4
Provide a.

On the other hand, stainless steel, copper alloy, etc.
The bottom cover body 5 and the core 6, which are thin plate materials of 5 mm, constitute the bottom cover 2 fixed by brazing, and the core 6 is provided with a concave groove 6a.

The concave grooves 6a of the core 6 are installed in the same number of corresponding locations as the convex pawls 4a of the inner shell 4, and the core 6 and the inner shell 4 are assembled by the rotation of the grooves 5a provided on the bottom body 5. It will be done.

The back cover packing 7 is vertically compressed in a packing box formed by the inner diameter of the back cover body 5, the stepped part of the core 6, and the lower surface of the body 5, and is held waterproof.

Further, a decorative plate 8 is mounted on the brim surface 4b of the inner shell 4, and a plastic seal 1 is mounted on the outer diameter of the glass 9 and the inner wall surface of the body 5.
0, and the above-mentioned parts are connected and kept waterproof by radial compressive frictional force.

As configured above, the outer shell 3, inner shell 4, back cover body 5, and core 6 are all thin-walled members that can be easily press-formed, making it possible to replace the thick-walled materials used in conventional case manufacturing. No machining is required, resulting in a significant reduction in man-hours and cost savings.

Further, the body 1, which is composed of an outer shell 3, an inner shell 4, and a body 5, is fixed by insert molding by injection, and is securely fixed without breaking.
It is made of stainless steel, copper alloy, etc., which have traditionally been used for medium-to-high-end products, and can maintain a metallic texture, with a sharp finish and delicate streaks.

In addition, the inner shell 4, the back cover 2, the back cover packing 7, and the middle frame 11 are standard or can be peeled off for a limited number of movements 12, and the outer shell 3, body 5, decorative plate 8, glass 9, and plastic cover It has a versatile structure that can express 10 designs in many variations, and has the advantage of being efficient in terms of production management.

As described above, the present invention can be manufactured at a low cost, and the texture and quality of conventional high-end products can be sufficiently ensured, and its effects are tremendous.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a portable wristwatch showing an embodiment of the present invention. FIG. 2 is a partial three-dimensional view of the trunk 1 shown in FIG. 1. FIG. 3 is a partial three-dimensional view of the Urabuta 2 shown in FIG. 1. 1... Torso, 2... Urabuta, 3...
...outer shell, 4...inner shell, 5...body, 6...core, 7...urabutapatsukin, 8... ...Decorative board, 9...Glass, 1
0...Plastic packing, 11...
・Middle frame, 12...Movement, 4a...
...Convex claw, 4b...Brim surface, 5a...
・Concave groove.

Claims (1)

[Scope of utility model registration request] An outer shell and an inner shell made of metal members such as stainless steel or copper alloy are placed on the outer surface of the body and on the inner surface of the body, respectively, and the outer and inner shells are injected with a polymeric material such as phenol or Rydon. The side part is integrally molded with an insert, and the inner shell part is provided with at least two convex claws, which are fitted and rotated in concave grooves provided on the back cover to couple and fix the body and the back cover. A case for a mobile watch.