JPS5821181A - Construction of waterproof case for portable watch - Google Patents

Abstract

PURPOSE:To permit opening of a titled case with small force and to prevent damaging of a packing by making the outside diameter of a back smaller than the inside diameter of a case band and disposing the surface of the back to be brought into contact with the packing in such a way that it recesses inward from the bottom surface of a middle. CONSTITUTION:A back 4 of a watch is brazed with a casing ring 2 in one body. The casing ring 2 is flanged toward the upper outside circumference and further an engaging projection 2d is formed from a part of said flange. In the prior art, the outside diameter of the back is larger than the inside diameter of the middle, but in the embodiment of this invention, the outside diameter of the back is smaller than the inside diameter of the middle, and the surface of the back to be brought into contact with a packing recesses inward from the bottom surface of the middle. With such construction of the case, it is possible to remove the engaging projection 2d by the principle of a lever by inserting a prying implement into the skew W, and since the back can be opened without fail with small force, there is no possibility of damaging the packing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly applied to the structure of a waterproof case for a portable watch having a non-circular parting shape.

In this kind of watch case, the inventor has % intercondylar.

It was previously proposed in No. 55-110081.

That is, as shown in FIG. 1, a core 2 is integrated into the back cover 4. The core 2 has a flange portion extending radially outward from its upper periphery, and a retaining protrusion 2d4E is formed from a portion of the 7 flange. On the other hand, an engagement groove 1a is carved in the barrel 1 at a position corresponding to the engagement protrusion 2d. In addition, the outer edge flange shape of the core 2 is made to have a clearance with the inner shape of the shell 1, and the engaging protrusion 2d and the engaging groove 1a are each formed to have h2) h. Therefore, the back cover 4 is movable relative to the barrel 1 in the direction of the engagement axis (in the direction of arrows A and B). However, by inserting a pangin 8 with an elastic retaining force into a space surrounded by the abutment surface of the back cover 4 with the body, the outer circumference and lower surface of the flange of the core 2, and the inner circumference of the body 1, A
←It fully regulates the movement of B, and at the same time serves as a waterproof casket. To open and close the back cover, fully insert the side locking tool 10 into the locking tool 11S4a and move it in the direction of arrow A, the gasket 8 will be elastically deformed, the engagement protrusion 2d will come off the engagement groove 1a, and the lock will be released. be done.

Note that 6 is a windshield glass, and 4 is a waterproof gasket next to the glass. As described above, the structure of the prior application is clear in principle, provides extremely reliable engagement force and waterproof performance, and is extremely useful in practice. However, as explained above, in order for the back cover 4 to be movable in the direction of the locking axis A e 13 with respect to the barrel 1, the height h2 of the locking protrusion and the height hl of the engagement groove must be set very strictly. Each had to be processed within a tolerance of about ±5, and h2'>hl. Also, if b2 is set too sharply relative to hl, it will appear as a gap between the abutment surface of the camera back and the body, and the appearance will look bad.
The length of contact with the body of Punkin 8 was also shortened, which in turn had a negative effect on waterproof performance, which required the strictest manufacturing control and became a bottleneck in the process.

On the other hand, with a case structure in which a waterproof seal is inserted into the joint between the case and the case back, and it is held together with a dowel (including the retaining protrusion), it is common to accidentally drown all the accessories when removing the case. Although the fc has the disadvantage that the waterproof gasket is easily cut, it has not been completely solved even in the above-mentioned prior application.

The present invention (d), as mentioned above, aims to solve the drawbacks and unresolved problems of the previous application.

FIG. 2 shows the case structure of the present invention.

The back cover of No. 4 and the core 2 are integrated by brazing.

The core 2 and the back cover 1 may be machined from a single piece. Similar to the conventional embodiment shown in FIG. 1, the core 2 has seven flanges facing the rising leg, and a retaining protrusion 2di is formed from a portion of the flange. Further, the barrel 1 is provided with an engagement groove 1a'5 at a position corresponding to the engagement protrusion. Also,
Similarly to the conventional embodiment shown in Fig. 1, a clearance is provided between the outer shape of the core 7 flange, the outer shape of the back cover, and the inner shape of the barrel, so that it can move in the locking axis direction (80B). It has become. Furthermore, a packing 8 is provided in which an elastic restoring force is applied to the space consisting of the outer circumference of the core, the lower surface of the core flange, the upper surface of the layered outer circumference, and the inner surface of the shell.
is inserted to regulate the movement in the direction of the retaining axis, and at the same time plays the role of waterproofing. The major difference from Fig. 1 is that in Fig. 1, the outer diameter of the back cover is larger than the inner diameter of the case, but in the embodiment of the present invention, the outer diameter of the back cover is smaller than the inner diameter of the case. The gasket contact surface is deeper than the bottom surface of the case.To open and close the camera back, push the camera back 4 in either direction A4+B, and the engaging protrusion 2d will open. It is disengaged from the engagement groove 1a and the engagement is released.

This is basically the same as the embodiment of the prior application, FIG. 1, but
In Fig. 1, when moving the back cover, the Kojiake tool 10 is inserted into the Kojiake Sarai 4a and pushed in the direction of arrow A, but in the present invention, the second
As shown in figure (a), the Kojiake tool 10 is located on the inside of the body 1 and on the back cover 1.
Insert it into the gap W between the outer surface of the case 1 and use the inner surface of the case 1 as a lever to move the case back in the direction opposite to the moving force direction (determined as direction A).
When the Kojiake tool 10 is tilted in the direction B), the back cover moves in the direction A according to the principle of Tetsu-chan as shown in Fig. It is removed from the groove 1a and the attachment is released. Here, the conditions of the retaining portion will be explained in more detail with reference to FIG.

FIG. 5(b) is a partial sectional view of the front side including the back cover 4, the core 2.7, the flange portion 2c, and the engaging protrusion 2d. Furthermore, Figure 3 (a
) As shown in IC, the hooking part W1 between the engaging protrusion 2d and the engaging groove 1a is the clearance W2 between the inner surface of the case and the outer surface of the case back.
The depth W3 of the engagement groove is set to be more than twice wl. That is, W2> Wl, W3
> 2 X J is required.

As described above, according to the case structure of the present invention, the locking tool inserts the gap WK and uses the lever principle to move the back cover and release the engagement ring, so it can be opened reliably with a small force, unlike the conventional case. There is no longer any danger of damaging Patsukin during Kojiake.

i! In addition, since only horizontal forces act on the back cover from the sides, the back cover does not deform when it is pressed, making it possible to use a thin plate back cover.

In addition, since there is no abutment surface where the lower part of the body and the upper surface of the back cover overlap as in the conventional case, there is concern about the accuracy of the processing positions of the engaging protrusion 2d and the engaging part 1a. Therefore,
It is easier to process and has more stable waterproof performance.

FIG. 4 is an example of the music of Vj1 in this embodiment.

FIG. 4 shows an embodiment in which the back cover 4 is not a mere half-sized plate, but a plate-shaped back cover, and this is applied when the movement that is housed in the case is thick. FIG. 5 shows a case where the core 2 and the back cover 4 are made as one body by using a full-texture mold, die-casting, or machining.

FIG. 6 shows an example of the pond on the back cover of the back cover 4, in which a groove 4cf is carved into the bottom cover on the outer surface of the back cover. This is to make it easier to remove the camera back 4 from the body 1 after pressing the button. Even without this groove, the camera back would float due to the repulsive force from the movement inside, but This is more reliable. Figure 7 4a) (b) shows case 1 and back cover 4.
FIG. 3 is a plan view of the engagement state of the camera as viewed from the back cover side. Since the gap W into which the Kojiake tool is inserted is usually narrow, it may be difficult to insert the Kojiake tool. For this purpose, a bulge is provided on the body and on the front lid to also serve as an indication of the position where the neck kojiake tool is inserted. FIG. 7(a) is a diagram with a rib attached to the inner surface of the body 1. FIG. 7(b) shows a view with a bulge attached to the outer surface of the back cover 4.

[Brief explanation of the drawing]

1st ill... sectional view showing the embodiment of the prior application, 2nd F
r(a), (b)...An assembled sectional view showing the structure and operation of the present invention, Fig. 3 fa)...Engagement f of the present invention! rt (1))... A partial cross-sectional view showing the securing portion of the back cover of the present invention. Figures 4 and 5 are cross-sectional views showing embodiments of songs according to the present invention; Figures 6 and 7 (a), (b)... partial cross-sectional views showing embodiments of the Kojiake portion of the present invention; and a plan view,
Symbols in the figures are common to each figure: 1...Body, 1a, ε-, f4 Retaining groove, 2...Middle 7, 2d...Engaging protrusion, 3 ...Crow side packing, 4...Back cover, ゛5...Windshield glass, 8...Waterproof packing, 10...Kojiake tool . Applicant Daini Seikosha Co., Ltd. Agent Patent Attorney Mogami Mutsu = 9-

Claims (1)

[Claims] +l) The case back is movable in the direction of the retaining axis with respect to the body of the M-band watch case, and the gasket is compressed and circumferentially disposed between the inner surface of the case and the outer surface of the core. In the structure of a waterproof case for a mobile watch that aims to restrict movement in the direction of the locking axis and achieve waterproof performance, the outer diameter of the case back is made smaller than the inner diameter of the case, and the clearance W2 in the direction of the locking axis is set to engage the case. For a mobile watch, characterized in that the overlap W of the groove and the core engaging protrusion is conditioned so that the total w2>Wl, and the contact surface of the gasket of the back cover is placed at a position that is wider than the bottom surface of the body. Waterproof case structure. (2. In claim 1, the Kojiake tool is
A waterproof watch case with a structure that allows you to open the back cover by inserting it into the gap W on the back cover and using the inside surface of the case as leverage. (3) Claims 1 to 2 are characterized in that a bulge is provided on a part of the body or the bottom cover so as to partially widen the gap between the body and the camera back. Waterproof case construction. (4) A structure of a waterproof case as set forth in Claims 1 to 5, characterized in that a groove is carved on the outer surface of the back cover, into which a locking tool is hooked.