JP3489905B2 - Screw lock push button device for high pressure waterproofing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw lock push button device for high pressure waterproofing of a timepiece.

[0002]

2. Description of the Related Art The applicant of the present application has previously attached a malfunction prevention ring to a side pipe by loosely fitting an external operating member to the side pipe fixed to a watch case and adjusting the position by rotation. When the malfunction prevention ring is moved outward in the axial direction and abuts against the head of the external operation member, the movement of the external operation member is restricted.
-129185.

[0003]

DISCLOSURE OF THE INVENTION The present invention is an improvement of the above-mentioned conventional invention, and provides a screw lock push button device for high atmospheric pressure waterproofing, which has a function of preventing malfunction of the push button shaft and a waterproofing function under high atmospheric pressure. The purpose is to do.

[0004]

In order to achieve the above-mentioned object, a high-pressure waterproof screw lock push button device of the present invention is provided with a side pipe fixed to a watch case so as to communicate the inside and outside thereof, and the side pipe. It is slidably inserted and is screwed to a push button shaft provided with a push button head having an annular cross section at its axially outer end and an outer flange formed on the outer periphery of the push button head. A screw ring that moves axially with rotation and has an inner flange formed on the inner periphery of the axial outer end, and when the screw ring moves axially inward, its inner end surface and the outer surface of the watch case A first annular packing compressed between and a second annular compression compressed between the inner flange of the screw ring and the outer flange of the push button head when the screw ring moves axially inward. A ring-shaped packing is provided, and a retaining portion is provided inside the watch case at an axially inner end portion of the push button shaft, and an outer end outer circumference of the side pipe and an inner end inner circumference of the push button head portion are provided. They are formed into corresponding non-circular shapes and are fitted together.

It is desirable to have the following structure.
A spring that urges the push button shaft outward in the axial direction is interposed between the side pipe and the push button shaft. A retaining protrusion should be provided on the inner circumference of the axially inner end of the screw ring.

[0006]

When the screw ring is rotated and moved axially outward, a gap is formed between the inner end surface of the screw ring and the outer surface of the watch case, and the push button shaft and the screw ring are axially inward by a distance corresponding to this gap. It becomes slidable.
When the screw ring is rotated in the opposite direction to move inward in the axial direction, the inner end surface of the screw ring comes into contact with the outer surface of the watch case, and movement of the push button shaft and the screw ring inward in the axial direction is restricted.

The first and second annular packings, which are compressed when the screw ring moves inward in the axial direction, prevent water from entering the inside of the watch case from the inner circumference of the screw ring. By making the outer circumference of the outer end of the side pipe and the inner circumference of the inner end of the push button head that are fitted together non-circular, the relative rotation of the side pipe and the push button shaft is suppressed, and the screw ring rotates. The rotation of the push button shaft is restricted due to.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, the high-pressure waterproof screw lock push button device 1 is inserted into a through hole 3 penetrating the side surface of a watch case 2 so as to communicate the inside and outside thereof, and is also fixed to the watch case 2. And the side pipe 4
And a push button shaft 5 slidably inserted along the axial direction thereof, and a push button head 6 is integrally provided at an axially outer end of the push button shaft 5.
A screw ring 7 is screwed onto the outer circumference of the push button head portion 6, and the screw ring 7 moves in the axial direction as the screw ring 7 rotates. If it is difficult to machine the push button shaft 5 and the push button head 6 integrally,
The push button shaft 5 and the push button head 6 may be formed separately, and then integrated by means such as welding, brazing, press fitting, or screw fixing.

The watch case 2 has substantially the same structure as a case of an ordinary wrist watch or the like, except that a first step portion 8 having a diameter larger than the inner portion is formed on the outer periphery of the axially outer end of the through hole 3. Second step portions 9 each having a larger diameter are formed concentrically outside the first step portion 8 in the axial direction, and circular recesses 14 are formed in the first step portion 8 along the circumferential direction.

The side pipe 4 has a small diameter portion 12 having an outer diameter substantially the same as the diameter of the through hole 3 of the watch case 2 and longer than the through hole 3.
As shown in FIG. 2, the collar piece 1 that engages with the first step portion 8 of the watch case 2 around the outer periphery of the axially intermediate portion of the small diameter portion 12 is provided.
0 is formed so as to project laterally, and a circular protrusion 15 that engages with the circular recess 14 of the timepiece case 2 is formed on the inner end surface of the collar piece 10 along the circumferential direction.

A large-diameter cylindrical portion 11 is formed at the axially outer end of the small-diameter portion 12. As shown in FIG. 3, the outer shape of the tubular portion 11 is formed into a non-circular shape (a hexagon in the illustrated embodiment), and the inner diameter thereof is formed to be substantially equal to the outer diameter of the small diameter portion 12. A spring locking step portion 13 is formed at the boundary between the inner circumference and the inner circumference of the small diameter portion 12. Then, the small-diameter portion 12 of the side pipe 4 is inserted into the through hole 3 of the watch case 2, the collar piece 10 is brought into contact with the first step portion 8, and the circular ridge 15 is engaged with the circular groove 14 for welding. The watch case 2 and the side pipe 4 are fixed with each other. Then, the tubular portion 11 of the side pipe 4 is projected from the outer surface of the watch case 2 with a space. In addition, the side pipe 4 is attached to the second step portion 9 of the watch case 2.
The first annular packing 31 is fitted so as to surround the outer periphery of the collar piece 10. The through hole 3 of the watch case 2
As another means for fixing the side pipe 4 to the side, brazing, press fitting, adhesion, or the like, or a combination thereof may be performed.

The push button shaft 5 is formed to be slightly thinner than the inner diameter of the small diameter portion 12 of the side pipe 4 and longer than the side pipe 4, and as shown in FIGS. A locking groove 16 is formed in the locking groove 16, and a snap ring 18 serving as a retaining portion is fitted in the locking groove 16.
Further, two mounting grooves 17, 17 are formed around the outer periphery of the middle portion of the push button shaft 5 along the circumferential direction, and the mounting grooves 17, 17 are respectively provided with annular elastic packings 19, 1.
9 is fitted.

The push button head 6 is integrally projected laterally from the axially outer end of the push button shaft 5 and is bent inward in the axial direction from the outer peripheral edge thereof to have an annular cross section. As shown in FIG. 4, the coil spring 30 can be fitted between the inner peripheral surface of the push button head 6 and the outer peripheral surface of the push button shaft 5. Further, an outer flange 20 having a diameter larger than that of the collar piece 10 of the side pipe 4 is formed at an axially inner end portion of the outer peripheral surface of the push button head portion 6, and a male screw 23 is engraved on the outer peripheral surface of the outer flange 20. Has been done. A locking recess 21 is provided on the inner peripheral surface of the outer flange 20 along the circumferential direction, and a large number of irregularities (not shown) are formed on the surface of the locking recess 21.

Further, as shown in FIG. 4, a detent ring 22 is fitted in the locking recess 21 of the push button head 6. The outer diameter of the whirl-stop ring 22 is slightly larger than the inner diameter of the locking recess 21, and a large number of irregularities (not shown) are formed on the outer peripheral surface of the whirl-stop ring 2.
When 2 is forcibly pushed into the inner circumference of the locking recess 21, the stopper ring 22 is prevented from coming off due to the unevenness formed on the contact surface.

Further, the detent ring 22 can be fitted to the outer periphery of the tubular portion 11 of the side pipe 4, and its inner periphery corresponds to the apex of the tubular portion 11 as shown in FIGS. 6 and 7. A plurality of (six in the illustrated embodiment) groove portions 24 are formed along the axial direction. Therefore, the tubular portion 11 can move in the axial direction with respect to the side pipe 4 as the push button shaft 5 and the push button head portion 6 slide, but cannot rotate about the central axis. You can't.

Although the groove 24 is formed on the inner peripheral surface of the rotation preventing ring 22 as in this embodiment, the machining is easy. However, the inner peripheral surface of the rotation preventing ring 22 is similar to the outer shape of the cylindrical portion 11. It can be a hexagon. Further, if the detent ring 22 is separate from the push button head 6, it is easy to process, but it may be formed integrally.

As shown in FIGS. 1 and 4, the screw ring 7 has an inner diameter of an outer flange 20 of the push button head 6.
8 is formed to have a substantially equal outer diameter, and as shown in FIG. 8, an annular groove 25 is formed on the inner periphery of the inner end in the axial direction.
A C-ring 26, which serves as a retaining protrusion, is fitted into the annular groove 25. An inner flange 27 is provided on the inner peripheral surface of the axially outer end of the screw ring 7, and an annular packing engaging groove 28 is formed adjacent to the inner side of the inner flange 27 in the axial direction. A second annular packing 32 is fitted in the groove 28.

Further, a female screw 29 which is screwed into the male screw 23 of the push button head 6 is formed between the annular groove 25 and the packing engagement groove 28 on the inner peripheral surface of the screw ring 7, and the outer shape of the screw ring 7 is formed. As shown in FIG. 9, is formed in a non-circular shape (octagonal in the embodiment shown in the drawings) so that it does not slip easily when being picked up and rotated. Then, as shown in FIG. 4, the screw ring 7 is fitted on the outer peripheral surface of the outer flange 20 of the push button head portion 6, and the female screw 29 and the male screw 23 thereof are screwed together. As a result, the screw ring 7 When the is rotated, the screw ring 7 moves along the axial direction.

The push button shaft 5 fitted with the screw ring 7 is inserted into the side pipe 4 with the push button head 6 facing outward, as shown in FIG. A snap ring 18 is fitted in the locking groove 16 of the push button shaft 5 inside the watch case 2.
Comes into contact with the axially inner end surface of the side pipe 4 to restrict the push button shaft 5 from moving axially outward. In addition, the elastic packing 1 attached to the outer periphery of the push button shaft 5
9 and 19 are compressed by the inner peripheral surface of the side pipe 4 to prevent water from entering from the inside of the side pipe 4 into the inside of the watch case 2.

Further, the inner end portion of the coil spring 30 fitted around the outer circumference of the push button shaft 5 is brought into contact with the spring locking step portion 13 of the side pipe 4, so that the push button shaft 5 is axially outward in the normal state. Being energized. Further, as described above, since the outer shape of the tubular portion 11 of the side pipe 4 and the inner shape of the detent ring 22 fitted thereto are formed in a non-circular shape, the push button shaft 5 is free to move in the axial direction. Can slide but cannot rotate. As a result, the push button shaft 5 does not rotate together with the screw ring 7 even if the screw ring 7 is rotated, and the screw ring 7 reliably moves in the axial direction.

The high pressure waterproof screw lock push button device 1 is used as follows.

When the push button shaft 5 is operated, the screw ring 7 is rotated to move it to the axially outer end of the push button shaft 5 as shown by the broken line in FIG. Then, a gap is opened between the axially inner end surface of the screw ring 7 and the second step portion 9 of the watch case 2, and when the push button head 6 is pressed, the push button shaft 5 is axially moved by a distance corresponding to this gap. Slide inward. When the push button head 6 is released, the push button shaft 5 returns to its original position by the elastic force of the coil spring 30.

When the screw ring 7 is rotated in the opposite direction and moved inward in the axial direction until the inner end surface of the screw ring 7 presses the first annular packing 31, the push button shaft 5 is locked and inward in the axial direction. Movement is regulated. At this time, the first annular packing 31 is compressed between the second step 9 of the watch case 2 and the inner end surface of the screw ring 7, and the second annular packing 32 is pushed by the push button head 6.
Since it is compressed between the outer flange 20 and the inner flange 27 of the screw ring 7, the screw ring 7 is compressed even under high pressure.
There is no possibility that water will enter the inside of the watch case 2 through the inside of the case and the through hole 3.

The outer shape of the tubular portion 11 of the side pipe 4 is not limited to the hexagonal shape, and can be formed in other non-circular shapes.
In this case, the groove portion 24 is formed on the inner peripheral surface of the whirl-stop ring 22 according to the number of vertices of the outer diameter of the tubular portion 11. Moreover, the outer shape of the screw ring 7 may be a shape other than an octagon.

[0025]

The high-pressure waterproof screw-lock push-button device of the present invention restricts the axial movement of the push-button shaft and prevents its malfunction simply by moving the screw ring and making contact with the outer surface of the watch case. While being able to
When the push button shaft is locked in this way, the first and second annular packings prevent water from entering from both axial ends of the screw ring, and therefore, even under high pressure, the inner surface of the screw ring passes through the outer surface of the side pipe. There is no need to worry about water getting inside the watch case. Further, since the outer circumference of the outer end of the side pipe and the inner circumference of the inner end of the push button head that is fitted to the side pipe are formed in a non-circular shape, rotation of the push button shaft is suppressed, and therefore the screw ring is rotated. Even if it moves, the push button shaft does not rotate with it, and the screw ring can be reliably moved.

According to the second aspect, when the hand is released from the head portion of the push button, the push button shaft automatically returns to the original position, and according to the third aspect, the screw ring is excessively rotated and the push button shaft is rotated. Don't worry about falling out of it.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a high pressure waterproof screw lock push button device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a side pipe.

FIG. 3 is an end view of the side pipe.

FIG. 4 is a sectional view of a push button shaft and a screw ring.

FIG. 5 is a sectional view of the push button shaft.

FIG. 6 is an end view of the detent ring

FIG. 7 is a sectional view of the rotation-stop ring.

FIG. 8 is a sectional view of a screw ring.

FIG. 9 is an end view of the screw ring.

[Explanation of symbols]

1 High pressure waterproof screw lock push button device 2 watch case 3 through holes 4 side pipe 5 push button shaft 6 push button head 7 screw ring 8 First stage 9 second step 10 collar pieces 11 tubular part 12 Small diameter part 13 Spring engagement step 14 circular groove 15 circular ridges 16 Locking groove 17 mounting groove 18 Snap ring (retaining part) 19 elastic packing 20 outer flange 21 Locking recess 22 Male screw 24 groove 25 annular groove 26 C ring (prevention protrusion) 27 Inner flange 28 Packing engagement groove 29 female screw 30 coil spring 31 First annular packing 32 Second annular packing

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) G04B 37/10 G04B 3/04 G04G 1/00

Claims (3)

(57) [Claims] 1. A side pipe fixed to the watch case so as to communicate the inside and the outside thereof, and a push button head which is slidably inserted into the side pipe and has an annular cross section at an axially outer end. The push button shaft and the outer flange formed on the outer periphery of the push button head are screwed to move axially in accordance with the rotation, and an inner flange is formed on the inner periphery of the axial outer end. A formed screw ring, a first annular packing that is compressed between the inner end surface of the screw ring and the outer surface of the watch case when the screw ring moves inward in the axial direction, and the screw ring moves inward in the axial direction A second annular packing that is compressed between its inner flange and the outer flange of the push button head, at the axially inner end of the push button shaft inside the watch case. For high-pressure waterproofing, a retaining portion is provided, and an outer periphery of an outer end portion of the side pipe and an inner periphery of an inner end portion of the push button head portion are formed in a corresponding non-circular shape and are fitted to each other. Screw lock push button device. 2. A high-pressure waterproofing according to claim 1, wherein a spring for urging the push button shaft outward in the axial direction is interposed between the side pipe and the push button shaft. Screw lock push button device. 3. The screw lock push button device for high pressure waterproofing according to claim 1, wherein a retaining protrusion is provided on an inner circumference of an axially inner end portion of the screw ring.