JPH0564792U - Mobile watch case structure - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to color-code the case part of the watch case into multiple colors in a few steps and to prevent the back cover from rotating with respect to the case. [Structure] Notches 12a to 12c having a predetermined depth are formed on an outer peripheral portion 11a of a case body 11 of a watch case, and rising portions 14a to 14c having a shape fittable to the notches are formed on a back cover 13. When the back cover 13 is attached to the body 11, the notches are covered by the rising portions so that the rising portions 14a to 14c of the back lid 13 can be seen in a part of the body 11 and The color of the back cover 13 is changed so that a wide range of designs can be made. And the back cover 1
Since the rising portion of 3 is fitted in the notch having a predetermined depth formed in the body 11, the back cover 13 does not rotate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a case structure of a portable timepiece such as an analog (hand display type) or digital (liquid crystal display type) electronic wristwatch and a pocket watch.

[0002]

[Prior Art]

 In the case of mobile watches such as watches, in addition to the original functions of the watches themselves, the design impression and the high-class feeling received from the exterior tend to be emphasized. Therefore, for example, in a wristwatch, the part visible from the front side (the side where the time is displayed) of the watch case is given a high-class feeling by surface treatment with two types of plating such as gold and silver or gold and palladium. We are trying to improve the appearance by devising the design side by brazing different metals and brazing different materials. In addition, the back side of mobile watches such as wristwatches is generally covered with a back cover, and the structure of the case for attaching the back cover to the case is, for example, Japanese Utility Model Publication No. 58-24092. There is one shown in FIG. 9 described in the publication.

The case structure of this portable timepiece holds the transparent glass 2 so as not to fall off by the step portion 1a formed on the front side upper part of the case 1, and engages with the inner peripheral surface of the case 1 near the lower side. The groove 4 is formed, and the engaging projection 5 formed on the back cover 3 is engaged in the engaging groove 4, and the engaging projection 5 is biased in the direction of arrow A by the spring property of the material itself. As a result, the case back 1 is held by the case back 1. By assembling the back cover 3 to the body 1 with a rubber packing 8 interposed between the surface 7 of the back cover 3 which faces the lower surface 6 of the body 1 and the lower surface 6 of the body 1. The back cover 3 is designed so that it can be assembled with a sense of moderation.

[0004]

[Problems to be solved by the device]

 However, in order to surface-treat the front side of the watch case with two types of plating as described above (the same applies in the case of more than that), conventionally, the two colors are first plated. It is often used to manufacture products because one area, for example, a gold plating is applied with one area masked, and then the second metal is plated with silver on the metal part masked in the next step. Was required, which was a factor that increased the production cost. In addition, in the case of improving the appearance by brazing metals of different materials, there is a problem that the brazing process takes time and the manufacturing cost similarly rises.

Further, in the case of the structure in which the case back 3 as shown in FIG. 9 is fixedly held on the case body 1 of the watch case, the inner peripheral surface of the case body 1 is formed only by the springiness of the engaging projections 5 of the material itself. Since the back cover 3 is held by being engaged with the groove 4, there is a possibility that the back cover 3 will rotate with respect to the case 1. If it rotates, in an analog type watch, Since even the dial may rotate through the module provided on the inside of the back cover 3, in such a case, the function as a clock will be affected. This rotation of the case back was an important issue.

The present invention has been made in view of the above problems, and a portion of the watch case seen from the front side of the watch case can be color-coded into a plurality of colors or have different designs without many steps and troubles. The purpose of the present invention is to provide a case structure for a portable timepiece in which the back cover is not likely to rotate with respect to the case while being able to be combined with each other.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, this invention forms a notch of a predetermined depth on the outer peripheral part of the watch case body, and forms a rising part in a shape that can be fitted into the notch on the back cover. The present invention provides a case structure for a portable timepiece in which a rising portion is fitted into a notch when the case back is attached to the case so as to cover the notch.

In addition, in the case structure of the above portable timepiece, the case and the back cover may be formed of different materials, or the case and the back cover may be subjected to different surface treatments. Good. Further, in the case structure of the above-mentioned portable timepiece, a notch is formed on both sides of the operation shaft or the switch button projecting to the outer peripheral portion of the case or between a plurality of switch buttons, and each rising notch of the back cover is formed in each notch. It is good to be fitted.

[0009]

[Action]

 According to the case structure of the portable timepiece configured in this way, the rising part of the case back appears to be exposed at a part of the outer periphery of the case, so if the colors of the case and the case back are different, the two parts of the case Can be easily realized. Also, it is easy to add a decorative pattern to one of them, so that a wide range of designs can be made possible, and at the same time, it is possible to give a sense of quality at a low cost. Further, since the rising portion of the back lid is fitted in the notch of a predetermined depth formed on the outer peripheral portion of the case, there is no fear that the case back will rotate with respect to the case.

Further, if the body and the back cover are made of different materials, the variation in design can be further expanded. If the body and the back cover are subjected to surface treatment such as plating of different colors, Since it is possible to easily convert the body part into two colors without masking a part of the body and performing multiple surface treatment steps as before, the number of steps is reduced and labor-intensive work is required. The cost is reduced because there is no.

Further, if notches formed on the outer peripheral portion of the body are formed on both sides of the operation shaft projecting on the outer peripheral portion of the body, or formed on both sides of the switch button or between a plurality of switch buttons, the back cover Even if the rising part of the case comes off from the notch of the body, the back cover is surely prevented from rotating with respect to the body by the contact of the rising part with the operation shaft or the switch button.

[0012]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a vertical sectional view showing a case structure of an analog wristwatch which is one of portable timepieces according to one embodiment of the present invention, and FIG. 2 is a plan view of the analog wristwatch.

An analog type (hand indicating type) wristwatch, which is this portable timepiece, has three notches 12a to 12c at a predetermined depth on the outer peripheral portion 11a of the body 11 of the watch case as shown in FIG. As shown in FIG. 1, rising portions 14a to 14c having a shape which can be formed along the direction and which can be fitted into the respective notches 12a to 12c are formed on the back lid 13 as shown in FIG. When mounted as shown in the figure, the rising portions 14a to 14c are fitted into the notches 12a to 12c, respectively, to cover the respective notches.

The body 11 is formed in an annular shape, and an annular protrusion 15 is formed on the inner surface side of the upper portion thereof. The transparent glass 16 is held on the upper surface thereof so as not to fall off, and the lower inner surface is formed. An annular engaging protrusion 17 is formed on the side. In addition, band mounting portions 18a, 18b and 19a, 19b are respectively provided on the outer peripheral portion 11a of the body 11 in both upper and lower directions in FIG. I am able to do it.

Further, in the outer peripheral portion 11a on the right side in FIG. 2, a pipe 21 into which an operating shaft (core) used when adjusting the time is rotatably fitted is fixed in a shaft hole 22. The crown 23 is attached to the tip of the operation shaft fitted and assembled in the pipe 21. The three notches 12a to 12c formed on the outer peripheral portion 11a of the body 11 are the notches 12c on the left side in FIG. 2 and the notches 12a and 12b on the right side in this embodiment. While being formed, the notches 12a and 12b are located on both sides of the pipe 21 projecting to the outer peripheral portion 11a of the body 11.

In the present embodiment, the notches 12a to 12c are formed with a depth reaching from the front side (upper surface side in the figure) of the body 11 to the back side as shown in FIG. 1. It is also possible to have a depth that does not reach the surface of the body 11 halfway along the outer peripheral portion 11a. As shown in FIG. 3, the back cover 13 is formed in an arc shape along the outer peripheral portion 11a of the body 11 except the rising portions 14a to 14c, and the outer diameter of the arc portion is smaller than the outer diameter of the body 11. It has a slightly smaller diameter.

Protrusions 24 are formed on the inner surface of the back cover 13 corresponding to the engaging protrusions 17 of the body 11, as shown in FIG. The outer surface of the protrusion 24 engages with the engaging protrusion 17 of the case 11 when the back cover 13 is fixedly held on the case 11, and in this state, the rising portions 14a to 14c. Fits into the cutouts 12a to 12c, and the cutout portions are completely covered.

When the back lid 13 is attached to the case 11, the back packing 13 and the case 11 are attached by inserting an annular packing 26 into an annular groove 25 formed in the back lid 13. Rattling is eliminated and airtightness is maintained during that time.

As described above, in this embodiment, when the case back 11 is assembled with the case back 13, the back cover 13 rises in the notches 12a to 12c formed in the outer peripheral portion 11a of the case 11 with a predetermined depth. Since the parts 14a to 14c are fitted with each other with almost no space, even if the case 13 has a case structure in which the elastic force of the protrusion 24 holds the case back 13 to the case 11 as shown in FIG. When trying to rotate with respect to 11, the rotation is blocked because the rising portions 14a to 14c are fitted in the notches 12a to 12c of the case body 11.

In this embodiment, as shown in FIG. 2, since the notches 12a and 12b are formed on both sides of the pipe 21 into which the operating shaft protruding to the outer peripheral portion 11a of the body 11 is fitted, the back cover 13 is formed. Even if the rising portions 14a, 14b may come off the notches 12a, 12b, such as when the rising portions 14b, 14c are thin, the rising portions 14a, 14b are The back cover 13 is reliably prevented from rotating due to the contact.

Further, according to the case structure of the portable timepiece, since the rising portions 14a to 14c of the case back 13 which are exposed on a part of the outer periphery of the body 11 also serve as the decorative portion, those colors are colored. If you make it different from the color of the body, you can easily change the color of the torso to two colors and design with accents.

Further, as shown in FIG. 2, the band mounting portions 18a, 18b and 19a, 19b respectively project from the outer peripheral portion 11a of the body 11, so that the surface of the outer peripheral portion 11a shown in FIG. It was not possible to directly process and attach the decorative pattern 27 by lathe processing as shown, but according to this embodiment, there is no protrusion on the outer periphery of the back cover 13 as shown in FIG. Since the decorative pattern 27 as shown in FIG. 4 can be formed on the side surface by rotating by cutting, it is possible to design a wider range.

The body 11 and the back cover 13 can be made of different materials, for example, by making the body 11 part made of ceramics and the back cover 13 part made of gold (18 K). , The variations due to the different combinations will increase. Even if the back cover 13 is made of a high-strength metal material so as to cover substantially the entire circumference of the body 11 and the body 11 is made of a material having a weak strength, the outer cover 1 Since 3 functions as a protector, damage to the body 11 can be prevented.

Further, for example, if the body 11 is silver-plated and the case back 13 is gold-plated, different parts of the body are first used when two-color plating is used. This was made possible by performing multiple surface treatment steps by masking. However, according to this embodiment, it is possible to easily perform plating of two colors without performing such a troublesome step (each component is a single color). Since it can be processed by plating, it reduces the number of steps and eliminates the need for labor-intensive work. In addition, either the surface of the body 11 or the back cover 13 may be subjected to an antiglare treatment (a treatment for removing the luster of the metal surface).

FIGS. 5 to 7 show an embodiment in which the back cover is fixed to the back surface of the body by screwing, and parts corresponding to those of FIGS. 1 to 3 are designated by the same reference numerals. This embodiment differs from the embodiment of FIGS. 1 to 3 only in that a plurality of screws 28 are used to fix the back cover 13 'to the case 11.

That is, as shown in FIG. 5, holes 29a to 29d (see also FIG. 6) are formed at four positions near the outer periphery of the back cover 13 ', and the body 11 is made to correspond to the holes 29a. A screw hole 34a is formed as shown in FIG. Further, screw holes 34b, 34c, 34d are formed so as to correspond to the holes 29b, 29c, 29d, respectively. Further, screw holes 34e and 34f (see also FIG. 7) similar to the screw holes 34a to 34d are formed between the band mounting portions 18a and 18b of the body 11 and between 19a and 19b, respectively.

Then, with the back cover 13 ′ mounted on the body 11 at a predetermined position as shown in FIG. 6, the screws 28 are respectively inserted into the holes 29 a to 29 d and inserted into the screw holes 34 a to 34 d. Screw on. Further, as shown in FIG. 5, screws 28 are similarly screwed into the screw holes 34e and 34f, and as shown in FIG. 7, the flange portion 28a of each screw 28 fixes and holds the edge 13a of the back cover 13 '. To do. According to this embodiment, the rotation of the back cover 13 'with respect to the body 11 can be prevented more reliably.

FIG. 8 is a plan view showing an embodiment in which the present invention is applied to a digital (liquid crystal display) electronic wrist watch. In this embodiment, push-button switch buttons 35a and 35b are used for adjusting the time when the notches 32a and 32b formed on the outer peripheral portion 31a of the body 31 protrude into the outer peripheral portion 31a of the body 31. And between the rising portions 33a and 35d of the back lid 33, even if the rising portions 33a and 33b of the back cover 33 may come off from the notches 32a or 32b of the body 31, the rising portions 33a and 33b are formed. The contact with the switch buttons 35a, 35b, 35c, 35d ensures that rotation is prevented.

The notches formed on the body 31 are formed on both sides of each of the switch buttons 35a, 35b, 35c, 35d, or on both sides of any one of the switch buttons, and the notches formed on the backs of the respective notches. The rising portions of the lid 33 may be fitted together.

[0030]

[Effect of the device]

 As described above, according to this invention, the rising portion of the case back appears to be exposed on the outer periphery of the timepiece body, so that the case body and the case back may be combined in different colors, or the same color may have a pattern. Since they can be attached and made different, the variation in designing a watch is widened, and it is possible to give a high-class feeling while maintaining low cost. And since the rising part of the case back is fitted into the notch of a predetermined depth formed on the outer peripheral part of the case, there is no risk of the case back rotating with respect to the case, so it is suitable for analog watches. It also prevents the dial from rotating through other internal parts due to the rotation of the case back.

Further, if the case and the back cover are made of different materials, or if they are color-coded by applying surface treatment such as plating of different colors, the variation in the design of the timepiece is further expanded. Further, if the notch formed on the outer peripheral portion of the body is formed on both sides of the operation shaft, both sides of the push button type switch or between a plurality of push button type switches, the rising portion of the back cover should be removed from the notch of the body. Even if it happens, the back lid is more reliable because its rising portion abuts against the operating shaft, the pipe into which it is rotatably fitted, or the push-button switch, so that rotation is reliably prevented. The property is improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a case structure of an analog wristwatch which is one of portable timepieces according to one embodiment of the present invention.

FIG. 2 is a plan view of the analog wristwatch.

FIG. 3 is a rear view of the same.

4 is a cross-sectional view showing an example in which a decorative pattern is formed on a side surface of a rising portion 14a of the back cover 13 of FIG. 1 by lathe processing.

FIG. 5 is a rear view similar to FIG. 3, showing an embodiment in which the back cover is fixed to the case with screws.

6 is a sectional view taken along the line CC of FIG.

7 is a cross-sectional view taken along the line DD of FIG.

FIG. 8 is a plan view showing an embodiment in which the present invention is applied to a digital electronic wristwatch.

FIG. 9 is a cross-sectional view showing a case structure of a conventional portable timepiece in which the case back may rotate with respect to the case.

[Explanation of sign]

11,31 Body 11a, 31a
Outer peripheral part 12a-12c, 32a, 32b Notch 13, 13 ', 33 Back cover 14a-14c, 33a, 33b Rising part 16 Glass 21 Pipe 23 Crown 35a, 35b, 35c, 35d Switch button

Claims (4)

[Scope of utility model registration request] 1. A notch having a predetermined depth is formed on an outer peripheral portion of a watch case body, and a rising portion having a shape that can be fitted into the notch is formed on a back cover, and the back cover is provided with the back cover. A case structure for a portable timepiece characterized in that the rising portion is fitted into the notch so as to cover the notch when mounted on the. 2. The case structure for a portable timepiece according to claim 1, wherein the case and the back cover are made of different materials. 3. The case structure of the portable timepiece according to claim 1, wherein the case and the back cover are subjected to different surface treatments. 4. The case structure for a portable timepiece according to claim 1, wherein the notch is provided on both sides of the operation shaft or the switch button or a plurality of switch buttons. A case structure for a portable timepiece, characterized in that the rising parts of the case back are fitted into the respective notches formed between them.