JPH0532793Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to the structure of an electronic watch with a depth gauge.

[Conventional technology]

In recent years, with the development and spread of diving equipment, the number of divers, both professional and amateur, has been rapidly increasing. In particular, with the advent of high-precision depth gauges using silicon diaphragm pressure sensors, further development is expected in the future. However, this high-precision depth gauge is difficult to maintain after use, especially since it is used in seawater.If it is left unused, salt may crystallize and block the pressure inlet hole, or sand and dirt may accumulate. There is a risk of damaging the sensor if it is used with the water inside, and unless this point is improved, this high-precision depth gauge will not become widespread in the future. Therefore, in order to solve this problem, we devised a structure for introducing external pressure from the outside of the pressure sensor.

Japanese Patent Application Laid-Open No. 59-159084 was developed as a structure for the pressure introduction part from the outside of the pressure sensor of the conventional electronic watch with depth gauge.
As shown in FIGS. 5 to 8 of the embodiment of the publication,
One example is a structure in which a cover plate with small holes is fixed to the pressure introduction part of the pressure sensor. However, with this structure, if the cover plate was not exposed on the front of the watch body, it was not possible to remove the cover and clean the sensor pressure introduction hole, resulting in design constraints and the need for special tools to remove the cover plate. .

[Problem that the invention attempts to solve]

From the above points, the pressure introduction hole is covered with a cover plate exposed at the front, which was a problem in the past, and the user cannot operate the pressure introduction hole without using a special jig etc. The aim is to eliminate the design of the cover plate for the sensor part, which seems to have been attached to the original, and create a design that is both clear and expressive of the pressure introduction hole. The purpose is to be able to operate it.

[Means for solving problems]

The present invention is a means to solve the above-mentioned problems and achieve the purpose, and the electronic watch with depth gauge of the present invention is:
A pressure sensor is fixed in position in a hole provided in an exterior case via a gasket, and a pressure introduction hole for introducing external pressure to the pressure sensor is provided in the exterior case, and the exterior case is covered from the outside. A cover is formed, and the cover is attached to the outer case by an easily attachable/detachable means such as a screw, and the cover is configured to have a small hole at approximately the same position as the pressure introduction hole. shall be.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.
FIG. 1 is a sectional view of a sensor section according to an embodiment of the present invention.

In FIG. 1, 1 is a pressure sensor, and a silicon diaphragm 1b is fixed to a sensor mounting base 1a, and wired to a substrate 1c. 1e is a protection frame that protects the sensor. 1d is a protective agent that protects the silicon diaphragm 1b from seawater and the like. This pressure sensor 1 is a general semiconductor type pressure sensor. In particular, the main text does not make any statements about driving principles, etc. 2 is the outer case and pressure sensor 1
The pressure sensor 1 is positioned through a gasket 3 through a mounting hole 2a. Packkin 3 also provides waterproofing between pressure sensor 1 and exterior case 2. 2b is an external pressure introduction hole provided in the exterior case 2. Reference numeral 4 denotes a conduction spring that electrically connects the circuit of the watch body and the pressure sensor 1. 5 is
The cover covers the surface of the exterior case 2 and screws 6
is fixed to the exterior case. Further, a small hole 5a is provided in the cover 5 at approximately the same position as the sensor 1.

FIG. 2 is a plan view of the sensor pressure introduction hole of the present invention.

FIG. 3 is a sectional view showing a conventional embodiment.
1 is a pressure sensor similar to that explained in FIG. 2 is the mounting hole 2 for sensor 1 on the exterior case.
a, and is positioned and fixed via a gasket 3. 4 is a conduction spring for electrical connection with the circuit of the watch body. A cover plate 7 is fixed to the outer case 2 with a screw portion 7b, and has a small hole 7a in the pressure introduction portion.

FIG. 4 is a plan view of a sensor pressure introduction section of a conventional embodiment.

In FIG. 3, after diving, the user first washes the cover plate 7 with water, then rotates the cover plate 7 with a special tool provided by the manufacturer and removes it from the outer case 2.
After cleaning sand, dirt, and salt adhering to the top surface of the pressure sensor 1 and the pressure introduction part, the cover plate 7 is attached to the outer case 2 again using a special tool. This was conventional work. In this case, the disadvantage is that the cover plate 7 cannot be rotated without first using a special tool, and if the tool is not available, the user may try to rotate it with tweezers etc. There is also a risk of damaging the protective agent 1d. Further, when the cover plate 7 is rotated, the area around the small hole 7a of the cover plate 7 may be damaged, which is a problem in terms of appearance.

Furthermore, as shown in FIG. 4, the cover plate 7 was exposed at the front of the watch body, which did not give it a good appearance.

While the conventional structure has the drawbacks mentioned above,
In the structure of the present invention shown in Fig. 1, since the cover 5 covers the entire surface of the watch case 2, the watch body will not be damaged even if it hits a rock or the like during diving, and it will not damage the watch body and prevent cuts on the watch body. There will be no more accidents. Furthermore, when the user cleans the pressure introduction hole, use a screwdriver to tighten screw 6.
It can be easily removed and cleaning can be done in a short time.

Further, the cover 5 can be made of a material such as urethane rubber, which is inexpensive to process, and has a good appearance.

Furthermore, as shown in the fourth part, the small hole 5a formed in the cover 5 has the same shape as the pressure introduction hole 2b of the external case 2.
Regardless of the size, it can be made into any shape or size, allowing you to create innovative designs and new images of pressure introduction holes.

[Effect of idea]

The present invention has a structure in which the cover covers the outer case and is attached to the outer case by a removable fixing means. Since the cover is removable, sand and dirt attached to the pressure introduction can be easily cleaned. , it is possible to provide an electronic watch with a highly accurate depth gauge.

Furthermore, by inserting the pressure sensor into the outer case and positioning it in the height direction by the pressure introduction hole and in the lateral direction by the waterproof member, it is possible to reduce the thickness with a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the structure of the sensor pressure introduction part of the present invention, and FIG. 2 is a plan view thereof. FIG. 3 is a sectional view showing the structure of a conventional sensor pressure introducing section, and FIG. 4 is a plan view thereof. 1...Pressure sensor, 1a...Sensor mounting base, 1b...Silicon diaphragm, 1c...Substrate, 1d...Protective agent, 1e...Protection frame, 2...Exterior case, 2a...Sensor mounting hole, 2b ... Pressure introduction hole, 3 ... Packing, 4 ... Continuity spring, 5
...Cover, 5a...Small hole, 6...Screw, 7...
Cover plate, 7a...Small hole, 7b...Threaded part.

Claims (1)

[Claims for Utility Model Registration] A pressure sensor, an exterior case comprising a mounting hole into which the pressure sensor is inserted, and a plurality of pressure introduction holes that are smaller in outer diameter than the mounting holes and which introduce external pressure into the pressure sensor, the exterior case; In the electronic timepiece with a depth gauge, which includes a cover attached to a case, the pressure sensor is positioned in the thickness direction by the pressure introduction hole and in the radial direction by a waterproof member, and the cover is at least partially flat with the pressure introduction hole. An electronic timepiece with a depth gauge, characterized in that overlapping circular or non-circular small holes are formed, the outer case covers the entire surface of the dial side of the outer case, and is attached to the outer case by a detachable fixing means.