JP2522941Y2 - Wristwatch sensor mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a sensor mounting structure for a watch case.

[0002]

2. Description of the Related Art Conventionally, in an electronic wristwatch, an electronic wristwatch equipped with a pressure sensor capable of measuring a water depth and an atmospheric pressure by providing a pressure sensor in a watch case has been commercialized. In particular, recently, a type capable of withstanding a water pressure of 200 meters conforming to the ISO standard has been developed so as to withstand full-scale diving. As a sensor mounting structure of this electronic wristwatch, a metal watch case is formed thickly, and a sensor housing is formed integrally with this watch case,
A structure in which a pressure sensor is provided in the sensor housing is known.

[0003]

However, in the above-described sensor mounting structure of the electronic wristwatch, the waterproof structure is simple and excellent in pressure resistance, but the shape of the wristwatch case becomes complicated, and the manufacture of the wristwatch case is extremely troublesome. There is a problem that there is. An object of the present invention is to provide a wristwatch case sensor mounting structure which has a simple watchcase shape, can be easily manufactured, has stable water resistance, and can withstand high pressure.

[0004]

According to the present invention, a wristwatch case having a through-hole formed in a side surface, a cylindrical outer cover having one end fixed to the through-hole, and A flange is provided at the other end side of the outer cover, and a cylindrical inner cover mounted in the outer cover is disposed between an outer peripheral surface of the inner cover and an inner peripheral surface of the outer cover. A ring-shaped first packing, a pressure sensor disposed in the inner cover, a ring-shaped second packing disposed between the pressure sensor and a flange of the inner cover, and an inflow through which an external fluid flows A disk portion having a hole formed therein and an engagement portion engaging with an outer end surface of the outer cover is formed, and a screw portion projecting from the disk portion and screwed to the inner surface of the outer cover is formed. And press the inner cover against the pressure sensor with the tip through the second packing. Characterized by comprising a lid consisting of protrusions attached.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3, reference numeral 1 denotes a metal watch case. A watch glass 2 is mounted on the upper part of the watch case 1 via a packing 2a, a back cover 3 is mounted on a lower part via a waterproof ring 3a, and a watch module (not shown) is housed inside. I have. Further, a through hole 4 penetrating inside and outside is provided on a side surface of the watch case 1 as shown in FIG. Inside the through-hole 4, a small-diameter portion 5a of a metal outer cover 5 formed in a stepped cylindrical shape with a small-diameter portion 5a at one end (the left end in the figure) and a large-diameter portion 5b at the other end is provided from the outside. Pressed in and fixed by brazing. On the left side of the outer cover 5 in the large diameter portion 5b, as shown in FIG.
A notch 6a is provided in the middle frame 6 having a substantially "C" shape, and a substantially cylindrical shape is formed on the right side of the middle frame 6 in the large diameter portion 5b. A metal inner cover 7 is mounted. That is, the left end surface of the inner cover 7 is in contact with the right end surface of the middle frame 6, and the projection 7 a provided on the left end surface is inserted into the cutout portion 6 a of the middle frame 6 to be inserted into the large diameter portion 5 b. A first waterproof ring 8 mounted and provided in an intermediate packing groove 7b on the outer peripheral surface.
Are attached closely to the inner surface of the large diameter portion 5b. Also,
A pressure sensor 9 is disposed in the inner cover 7 so as to be electrically connected to the timepiece module. That is, the pressure sensor 9 abuts on the second waterproof ring 10 provided in the packing groove 7d on the left side of the flange 7c, the right edge of which protrudes toward the center from the right end of the inner cover 7, and The left peripheral edge is inserted and arranged in a notch 6 b provided on the right end face of the middle frame 6. Further, at the right end of the outer cover 5, a male screw 13 provided on the outer peripheral surface of the protrusion 12 of the lid 11 is screwed with a female screw 5c provided on the inner surface thereof, and the lid 11 is attached. . This lid 11 is used for the outer cover 5.
A protruding portion 12 is formed in a substantially cylindrical shape on the left peripheral edge of the disk portion 14 which is substantially the same as the inner diameter of the large diameter portion 5b. When the male screw portion 13 is screwed into the female screw portion 5c of the outer cover 5, the protrusion 12 comes into contact with a notch 7e provided on the outer peripheral portion of the right end of the inner cover 7 so that the inner cover 7 is pressed. The sensor 9 is pressed through the second waterproof ring 10. An inflow hole 15 through which external water flows is provided at the center of the disk portion 14, and an engagement portion 16 that contacts the right end surface of the outer cover 5 is provided on the outer periphery of the disk portion 14. Is smaller than the outer diameter of the large diameter portion 5b. A jig mounting recess 17 is provided in a peripheral portion of the right side surface of the disk portion 14.

As described above, in the above-described sensor mounting structure, the through hole 4 is provided in the side surface of the watch case 1, and the small diameter portion 5 a of the metal outer cover 5 is fixed to the through hole 4. Since the pressure sensor 9 is disposed in the large diameter portion 5b, there is no need to provide a sensor housing in the watch case 1 as in the related art, and the shape of the watch case 1 is simplified, and the watch case 1 is easily manufactured. Can be
In addition, since the small diameter portion 5a of the outer cover 5 is press-fitted into the through hole 4 of the watch case 1 and fixed by brazing, the structure of this portion becomes solid and waterproofness is also ensured. When the pressure sensor 9 is disposed in the inner cover 7 and the inner cover 7 is disposed in the large-diameter portion 5b of the outer cover 5, the outer peripheral surface of the inner cover 7 and the inner surface of the large-diameter portion 5b of the outer cover 5 are formed. Is waterproofed by the first waterproof ring 8 and the space between the inner cover 7 and the pressure sensor 9 is waterproofed by the second waterproof ring 10, so that the waterproofness around the pressure sensor 9 is extremely reliable. . In particular, the inner cover 7 and the pressure sensor 9
When the male screw portion 13 is screwed into the female screw portion 5c of the outer cover 5, the inner cover 7 is pressed against the pressure sensor 9 via the second waterproof ring 10 by the tip of the protruding portion 12 of the lid 11, so that Increases waterproofness. When the male screw portion 13 of the lid 11 is screwed into the female screw portion 5c of the outer cover 5, the projection 7a of the inner cover 7 is inserted into the cutout 6a of the inner frame 6, so that the lid 11 The inner cover 7 does not rotate with the rotation of the inner cover 7, so that the flange 7 c of the inner cover 7 can be reliably pressed against the pressure sensor 9 via the second waterproof ring 10. Further, since the engaging portion 16 of the lid 11 is provided smaller than the outer diameter of the large-diameter portion 5b of the outer cover 5, the lid 11 does not rotate on its own and secures stable waterproofness. Can be. When the jig is attached to the jig mounting recess 17, the lid 11 can be easily turned and removed, and the pressure sensor 9 can be easily replaced.

[0007]

As described above, according to the present invention, a through hole is formed in the side surface of a watch case, one end of a cylindrical outer cover is fixed to the through hole, and a pressure sensor is provided in the outer cover. Since the sensor housing is not required to be formed in the watch case as in the conventional case, the shape of the watch case is simple, and the watch case can be easily manufactured. The first packing seals the inner peripheral surface of the outer cover, the second seal seals the space between the pressure sensor and the flange of the inner cover, and the inner cover of the outer cover is screwed with the screw of the projecting portion of the lid. By joining, the tip of the protruding portion presses the inner cover against the pressure sensor via the second packing, so that the waterproofness around the pressure sensor can be made extremely reliable, and the stable waterproofness is secured. When you can Moni, can be obtained which can withstand high pressures.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a sensor mounting structure of a watch case.

FIG. 2 is a plan view showing the right half of the watch case.

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a view showing the inside of an outer cover from which a lid, an inner cover, and a pressure sensor are removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Watch case 4 Through hole 5 Outer cover 7 Inner cover 7c Flange 8 First waterproof ring 9 Pressure sensor 10 Second waterproof ring 11 Lid 12 Projecting part 13 Male thread part 14 Disk part 15 Inlet hole 16 Engaging part

Claims (1)

(57) [Scope of request for utility model registration] 1. A wristwatch case having a through hole formed in a side surface, a cylindrical outer cover having one end fixed to the through hole, and mounted in the outer cover, and located at the other end of the outer cover. A cylindrical inner cover provided with a flange portion, a first ring-shaped packing disposed between an outer peripheral surface of the inner cover and an inner peripheral surface of the outer cover, and disposed in the inner cover. A pressure sensor, a ring-shaped second packing disposed between the pressure sensor and the flange of the inner cover,
A disk portion formed with an inflow hole into which an external fluid flows, and an engagement portion engaging with an outer end surface of the outer cover, and an inner surface of the outer cover which is protruded from the disk portion and is formed on the inner surface of the outer cover. A sensor mounting structure for a wristwatch case, comprising: a screw body to be screwed; and a lid comprising a protruding portion for pressing the inner cover against the pressure sensor via the second packing at the tip.