JPH0990060A - Fixing structure of display member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure fixing a display member and a transparent or translucent plastic dial plate, which has a sufficient fixing force and enables attainment of a beautiful finish in appearance. SOLUTION: This structure is so constructed as to fix a display member 2 having a leg 2a and constituted of a metal or plastic material and a transparent or translucent plastic dial plate 1 pierced by a small hole 1a for fitting the leg 2a of the display member 2. In this case, the lower side 2c of the display member and the peripheral part 1c of the small hole on the upper surface side of the dial plate 1 are fixed by bonding and, moreover, the fore end part 2b of the leg and the peripheral part 1b of the small hole on the lower surface side of the dial plate are fixed by calking or welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timepiece dial and, more particularly, to a structure for fixing a dial display member.

[0002]

2. Description of the Related Art Conventionally, the structure shown in FIGS. 3 and 4 is often used as a structure for fixing a display member having a leg, a mark, a pattern or the like having a foot protruding to the lower surface side to a dial. There is.

FIG. 3 shows a projecting foot 2 formed on the lower surface side.
a is inserted into the small hole 1a formed in the dial 1, and the tip 2 of the foot 2a of the display member slightly protruding from the lower surface of the dial 1
It is a structure in which b is fixed by crimping. This caulking fixing structure is very effective when the display member and dial are made of metal, and a considerable fixing strength is secured.

FIG. 4 shows the foot 2 with the adhesive 4 without crimping.
This is a structure in which the front end portion of a and the peripheral portion of the small hole on the lower surface of the dial are bonded and fixed. This adhesive fixing structure is characterized in that it can be used regardless of the materials of the display member and the dial. In particular, when either the display member or the dial plate is made of a plastic material, the fixing strength due to the above-mentioned caulking becomes weak, so this adhesive fixing structure is often used.

In addition, there is a fixing structure in which an adhesive is further applied to the crimped portion to fix the crimped portion, which requires stronger fixing strength.

[0006]

At present, there are many commercially available watches using electroluminescent dials (hereinafter referred to as EL dials) and solar dials. These E
For the L dial and the solar dial, transparent or translucent plastic resin is used as the material for the dial. In order to fix the display member for displaying time characters, marks, patterns, etc., which have feet protruding to the lower surface side to this transparent or translucent plastic dial plate, the fixing structure by caulking described in the above-mentioned prior art has a fixed strength. However, there are issues that cannot be fully secured. Further, as described above, the adhesive fixing structure using the adhesive has a problem that the adhesive is visually recognized from the upper surface, which is not preferable in terms of appearance quality. Further, the adhesive affects the transparency of the dial. There are also challenges. The present invention has been made in view of the above problems, and an object of the present invention is to provide a fixing structure which can secure a sufficient fixing strength and has no problem in appearance and function.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a transparent or semi-transparent plastic dial which is made of metal and has a display member having a foot protruding to the lower surface side and a small hole for mounting the foot of the display member. In the structure for fixing and, the lower surface of the display member and the periphery of the small hole on the upper surface side of the plastic dial are bonded and fixed, and further, the tip end of the foot of the display member and the small hole on the lower surface side of the plastic dial. The fixing structure is characterized in that the peripheral portion is fixed by caulking. Also, in the structure for fixing a display member made of a plastic resin material and having a foot protruding to the lower surface side, and a transparent or translucent plastic dial plate having a small hole for mounting the foot of the display member, The lower surface of the member and the peripheral portion of the small hole on the upper surface side of the plastic dial were bonded and fixed, and further, the tip end of the foot of the display member and the outer peripheral end surface portion of the small hole of the lower surface side of the plastic dial were fixed by welding. It is a fixed structure characterized by that.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The lower surface of the display member and the peripheral portion of the small hole on the upper surface of the dial are bonded and fixed, and the tip of the foot of the display member and the peripheral portion of the small hole on the lower surface of the dial are fixed by caulking or welding. As a result, it will be fixed in two places, and sufficient fixing strength can be secured. Further, in the adhesive fixing of the lower surface of the display member and the peripheral portion of the small hole on the upper surface of the dial plate, the adhesive is completely hidden by the display member by adhering within a range in which the adhesive does not protrude from the display member, and there is no external appearance. It has no effect. Also, when the display member is a metal material, the tip of the foot and the area around the small hole on the lower surface of the dial are caulked and fixed, and when the display member is a resin material, the caulked portion and the welded portion are extremely fixed. It has a small area and does not give an unnatural appearance when viewed from above.

[0009]

FIG. 1 shows an embodiment according to the present invention. For the sake of clarity, description will be given with an enlarged partial cross-sectional view of an essential part. In FIG. 1, a display member 2 made of metal and having a foot 2a protruding from the lower surface thereof is fixed, and a transparent or semitransparent plastic dial 1 having a small hole 1a for mounting the foot 2a is fixed. It is of structure. Foot 2 of display member 2
a is inserted in the small hole 1a of the dial 1, and the lower surface 2c of the display member 2 and the peripheral portion 1c of the upper small hole 1a of the dial 1 do not stick out the adhesive from the display member 2 via the adhesive 3. It is adhesively fixed within the range. Furthermore, the tip 2b of the foot 2a
Is fixed by being caulked with the peripheral portion 1b of the small hole 1a on the lower surface side of the dial 1.

Next, FIG. 2 shows another embodiment. FIG.
Manufactured from plastic resin material, the outer surface of which is decorated with 2e
And a transparent or semitransparent plastic dial 1 having a small hole 1a for mounting the foot 2a is fixed. The lower surface 2c of the display member 2 and the peripheral portion 1c of the small hole 1a on the upper surface side of the dial 1 are bonded and fixed via the adhesive 3 within a range in which the adhesive does not protrude from the display member 2. Further, the tip portion 2b of the foot 2a is fixed to the outer peripheral end surface portion 1d of the lower surface side small hole 1a of the dial 1 by welding.

In both of the above-mentioned two embodiments, the fixing structure is provided at two places, so that the fixing strength is also strong. still,
Adhesive fixing portions can obtain sufficient fixing strength even if they are adhesively fixed by an adhesive instead of an adhesive. Further, since the adhesively fixed portion is the lower surface portion of the display member, the adhesive is hidden by the display member and cannot be seen at all, so there is no influence on the appearance.

[0012]

The effects of the present invention described in detail above are as follows: in a transparent or translucent plastic dial plate,
By providing the two fixing parts, the adhesive fixing part and the caulking or welding fixing part, the fixing strength of the display member can be sufficiently secured. Further, since the adhesive fixing portion is provided on the lower surface side of the display member, the adhesive portion is hidden by the display member to be invisible, and there is no trouble in appearance. It also has no effect on the transparency of the dial.

[Brief description of drawings]

FIG. 1 is an enlarged partial sectional view of an essential part showing an embodiment of a display member fixing structure of the present invention.

FIG. 2 is an enlarged partial sectional view of an essential part showing another embodiment of the display member fixing structure of the present invention.

FIG. 3 is an enlarged partial sectional view of an essential part showing a conventional fixing structure for a display member.

FIG. 4 is an enlarged partial sectional view of an essential part showing another fixing structure of a conventional display member.

[Explanation of symbols]

 1 dial 1a small hole 1b lower surface side small hole peripheral portion 1c upper surface side small hole peripheral portion 1d lower surface side small hole outer peripheral end face portion 2 display member 2a foot 2b foot tip 2c display member lower surface 2e decoration 3 adhesive 4 adhesive

Claims (2)

[Claims] 1. A structure for fixing a display member, which is made of metal and has a foot protruding to the lower surface side, and a transparent or semitransparent plastic dial plate having a small hole for mounting the foot of the display member, The lower surface of the display member and the periphery of the small hole on the upper surface side of the plastic dial are bonded and fixed, and the tip of the foot of the display member and the peripheral area of the small hole on the lower surface side of the plastic dial are fixed by caulking. A fixed structure for a display member, which is characterized in that 2. A structure for fixing a display member made of a plastic resin material, the display member having a foot protruding to the lower surface side, and a transparent or semitransparent plastic dial plate having small holes for mounting the foot of the display member. , The lower surface of the display member and the peripheral portion of the small hole on the upper surface side of the plastic dial are adhered and fixed, and the tip end of the foot of the display member and the outer peripheral end surface portion of the small hole of the plastic dial plate are welded together. A fixing structure for a display member, which is fixed at.