JP2000258560A - Watch case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a case that can protect the inside from impact being applied to a watch case. SOLUTION: A watch case is equipped with a flat top buffer body 24 with elasticity being pinched between a bezel 13 and a drum 20, and a fixing means 36 for fixing the bezel 13 to the drum 20, thus protecting parts in the case, especially, a movement and a windscreen, against all impact, and hence preventing an accident.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watch case, and more particularly to a watch case having an impact-resistant structure for protecting a module in the case.

[0002]

2. Description of the Related Art As a shock-resistant structure, Japanese Utility Model 6-1711 has been proposed.
A watch case described in Japanese Patent Publication No. 0 is known. FIG. 12 is a cross-sectional view showing a timepiece case, in which a cushion made of an elastic material such as polyurethane rubber is provided between an inner body 1 made of metal and an outer body 2 made of a hard resin such as perprene. The buffer 3 is composed of an outer shell and a fixing screw 4 penetrating the buffer.
Is screwed into the inner body 1 to be fixed between the inner body 1 and the outer body 2.

[0003]

The outer shell 2 made of a hard resin such as pelprene used in the prior art shown in FIG. 12 has sufficient scratch resistance and abrasion resistance against contact with foreign matter, impact and the like. I can't show it. Therefore, if the wristwatch is used for a long period of time, the outer body will be damaged or worn. Further, since the fixing screw 4 is screwed into the inner body, when an impact is applied to the fixing screw, the impact is transmitted to the inner body, and the movement accommodated in the inner body may be broken.

Accordingly, a first object of the present invention is to provide a watch case which can protect each part in the case against an impact applied to each part of the watch case. A second object is to provide a wristwatch case in which an impact is hardly transmitted from the outer body and the inner body to the movement.

[0005]

According to a first aspect of the present invention, there is provided a flat top cushioning member having elasticity sandwiched between a bezel and a body, and a fixing means for fixing the bezel and the body. And The invention according to claim 2 is characterized in that a lower step portion is formed on the lower surface of the top shock absorber, and the outer peripheral portion of the windshield receiving member is inserted between the step portion and the body. The shock applied to the bezel is absorbed by the shock absorber and is not transmitted to the movement or windshield. The shock applied to the windshield is also absorbed by the buffer via the windshield receiving member. Therefore, the movement can be protected from impact. In addition, damage to the bezel and windshield can be prevented. In particular, the breakable windshield can be protected.

The invention according to claim 3 is characterized in that a step is formed on the outer peripheral portion of the upper surface of the shock absorber, and a projection on the lower outer periphery of the bezel is engaged with the step. The invention according to claim 4 is characterized in that the buffer has substantially the same width as the bezel.

The invention according to claim 5 is characterized in that a slope is formed on the inner lower surface of the shock absorber, and the slope is in contact with the slope on the outer periphery of the windshield. The invention according to claim 6 is characterized in that the fixing member engages with the windshield receiving member and regulates the lateral movement of the windshield receiving member. The danger of the windshield receiving member being greatly displaced by the impact and coming off from between the bezel and the trunk can be eliminated.

[0008] The invention according to claim 7 is characterized in that the fixing means is a screw which is screwed to the body through the bezel, and the screw passes through a concave portion formed on the outer periphery of the windshield receiving member. The invention according to claim 8 is characterized in that a dial ring buffer having elasticity is arranged between the windshield receiving member and the dial ring located above the dial. In addition to the shock being absorbed by the shock absorber and not being transmitted to the movement, it is possible to eliminate the risk that the windshield member and the dial ring collide with each other and be damaged by the shock. In particular, since the shock applied to the windshield is absorbed by the buffer via the windshield receiving member, the windshield that is easily broken can be protected.

[0009] The invention according to claim 9 is characterized in that the dial ring has an upwardly extending extension, and a dial ring buffer is disposed between the extension and the inner wall side surface of the body. Since the buffer is disposed in the recess formed between the wall portion of the dial ring and the inner wall side surface of the body, even if an impact is applied, the buffer is removed from between the windshield receiving member and the dial ring. Nothing. Further, the lateral impact applied to the dial ring is absorbed by the contact between the side surface of the wall and the buffer. The invention according to claim 10 is characterized in that the extension portion rises up to near the inner edge side surface of the windshield receiving member.
When checking the time, the buffer is not visually recognized, so that the aesthetic appearance of the wristwatch is not impaired.

[0010] The invention according to claim 11 is characterized in that the windshield member is made of a magnetic-resistant material. The movement can be protected from magnetic fields that could cause a failure.
The invention according to claim 12 is characterized in that a movement buffer having elasticity is arranged between the dial and the dial located above the dial and the movement. In addition to the shock being absorbed by the shock absorber and not being transmitted to the movement, the danger of collision between the dial and the dial due to the shock can be eliminated.

According to a thirteenth aspect of the present invention, the dial ring has an extension extending downward, and a movement buffer is disposed between the extension and the inner wall surface of the body. Since the buffer is disposed in the recess formed between the wall portion of the dial ring and the inner wall side surface of the body, even if an impact is applied, the buffer is removed from between the windshield receiving member and the dial ring. Nothing. Further, the lateral impact applied to the dial ring is absorbed by the contact between the side surface of the wall and the buffer. The invention according to claim 14 is characterized in that the movement buffer includes a hanging step located outside the outer edge of the movement. Even if a lateral impact is applied, the side surface of the hanging portion abuts against the outer edge of the movement, and the impact is absorbed.

The invention according to claim 15 is characterized in that an elastic cylindrical buffer is disposed between the side surface of the movement and the side surface of the inner wall of the body. In particular, a lateral shock applied from the side surface of the outer wall of the body is absorbed by the shock absorber and is not transmitted to the movement. The invention according to claim 16 is characterized in that the cylindrical buffer body has a step for supporting the step formed on the side surface of the movement from below. Even if an impact in the vertical direction is applied, the overhanging portion abuts the step portion, and the impact is absorbed.

The invention according to claim 17 is characterized in that a magnetic-resistant member is disposed between the cylindrical buffer and the side surface of the movement. Not only can the movement be protected from the magnetic field, but the shock applied to the anti-magnetic member is absorbed by the buffer, so that the deformation and breakage of the anti-magnetic member can be prevented. The invention according to claim 18 is characterized in that a bottom cushion having elasticity is arranged between the lower surface of the movement and the bottom of the inner wall of the body. In particular, the shock in the vertical direction is absorbed by the shock absorber and is not transmitted to the movement.

[0014] The invention according to claim 19 is characterized in that the bottom cushion is disposed in a recess formed in the bottom surface of the body. Since the displacement of the shock absorber due to the impact is suppressed, the shock absorber can always be stably brought into contact with the lower surface of the movement. The invention according to claim 20 may be characterized in that the bottom cushion is annular. Since the buffer is easily elastically deformed, the buffer can easily absorb the impact. The invention according to claim 21 is characterized in that a spring hole through which a ground spring of the movement is inserted is formed in the bottom buffer. Even if an impact is applied, the ground spring does not come off.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of a wristwatch using a case according to the present invention, FIG. 2 is a front view thereof, FIG.
4 is a sectional view taken along line IV-IV of FIG. 1, FIG. 5 is a sectional view taken along line VV of FIG. 1, FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 9 is an exploded sectional view of the watch case according to the present invention. The wristwatch case according to the present invention includes a metal inner body 20 and a metal outer body 21, and the outer body 21 has a pair of connecting legs 23 for connecting a band 22 on both sides.

The inner body 20 comprises a main body 20a and a bottom 20b as shown in FIG. A movement 30 is arranged on the bottom 20b via an annular bottom buffer 15 made of synthetic resin and an anti-magnetic member 31, and a cylindrical buffer 14 is provided between the outer periphery of the anti-magnetic member 31 and the main body 20a. Are located. A dial 34, a movement buffer 28, a dial ring 27, a dial ring buffer 26, a windshield member 25 made of a magnetic-resistant material are provided on the movement 30 via a solar cell 17 and a dial fixing part 16 of the movement.
The top buffer 24 and the bezel 13 are sequentially stacked.
Further, a windshield 33 is fixed on the windshield receiving member 25 via a windshield fixing and waterproof packing 18 (FIG. 3). Further, a packing 19 for fixing and waterproofing (FIG. 3) is interposed between the outer periphery of the windshield receiving member 25 and the inner body 20a.
Between the inner body 20 and the outer body 21, an annular outer cushion 35 made of synthetic resin is interposed. The two bodies are fixed at four places on the circumference by fixing screws 36 arranged in the radial direction. Since the buffer 35 is engaged with the outer body 21 at the concave and convex portions 39, the buffer does not shift or come off even when an impact is applied to the outer body.

As shown in FIG. 5, the fixing screw 36 comprises a head portion 36a, a large diameter portion screw 36b, and a small diameter tip portion 36c. 36c penetrates the buffer 35 and is engaged in a cup-shaped buffer 38 fitted in the hole 37 of the inner body 20. still,
The buffer 38 may be a cylinder without a bottom. This watch case employs a screw lock crown 40. The screw lock crown includes a support cylinder 56 fixed to the hole 55 of the inner body 20,
The crown 5 supported by being screwed to the screw portion of the support cylinder 56 with a screw 57
8 and the winding stem 60 of the timepiece are connected with the screw 61,
6 and a coil spring 63 provided between the winding stem connecting member 62 and the crown 58. The crown 58 is slidably and rotatably supported in the guard pipe 41 engaged and fixed to the outer trunk 21. When the crown 58 is rotated, the screw portion 57 is
When the crown is disengaged, the crown 58 protrudes outward by the coil spring 63, and the engaging hole 64 having a polygonal cross section of the inner wall of the crown engages with the corresponding outer wall polygon engaging portion 65 of the winding stem connecting member 62, By turning, the winding stem 60 can be rotated via the connecting member 62 to adjust the time.

Next, each part constituting the present invention will be described in detail. As shown in FIGS. 1 and 4, the bezel 13 is fixed to the main body 20 a of the inner body 20 with four screws 70. The screw 70 penetrates the hole 24 a of the top cushion 24 and engages with a concave portion 25 a formed on the outer periphery of the windshield receiving member 25. The buffer 24 has a width over the entire lower surface of the bezel,
It has an outer peripheral upper step 71 (FIG. 5) and an inner peripheral lower step 72, and the step 71 is engaged with the outer peripheral lower annular projection 73 of the bezel, and the step 72 is an outer peripheral edge of the windshield receiving member 25. Is engaged. The buffer 24 has a slope 74 at the lower edge of the inner periphery.
This is in contact with the upper peripheral slope 75 of the windshield 33.

The movement buffer 28 is provided with the stepped portion 2 downward.
8a, in which the dial fixing portion 16 of the movement is engaged. With the above configuration, when an impact is applied from above the bezel 13, the shock is prevented from being transmitted to the inner trunk 20, the movement 30 and other parts inside the inner trunk 20 by the buffer 24. In addition, when a radial impact of the bezel is applied, the impact is received by the step 71 of the buffer 24 and the windshield 33 is provided.
Protect etc. Further, even if the windshield 33 is subjected to axial and radial shocks, it is received by the slope 74 of the buffer 24 to prevent the windshield from coming off, and the shocks in the radial direction are buffered via the windshield receiving member 25. The body can absorb external force and protect the windshield. Further, since the screw 70 is engaged with the concave portion 25a of the windshield receiving member 25, the deflection of the member is prevented.

The look-back ring buffer 26 is provided on the wind-shield receiving member 25 by the impact applied to the wind-shield 33.
In this way, it is possible to prevent any of them from being damaged and prevent the windshield itself from being damaged. Further, the impact on the bezel 13 is prevented from being transmitted to the movement 30. on the other hand,
The dial ring 27 has upper and lower extensions 27a and 27b to hide the buffers 26 and 28. In particular, the extension 27a is extended to the windshield receiving member so that the buffer is not visible from the outside. Further, even if a radial impact is applied, the extension portion 27a hits the buffer 26, thereby preventing damage to the ring.

The movement buffer 28 prevents an axial impact from being transmitted to the movement 30 and prevents the dial ring 27 from hitting the movement. Furthermore, it contacts the outer peripheral upper surface of the dial 34 to suppress the dial. The cylindrical shock absorber 14 absorbs external force applied to the outer shell 21 and the inner shell 20 to prevent the external shock from being transmitted to the movement. Step 14a
Holds the movement via the anti-magnetic member 31. The lower step 28a of the movement buffer 28 receives an impact on the movement in the radial direction and protects the movement.

The bottom cushion 15 is provided with a recess 20c in the bottom 20b.
It is housed inside to absorb the axial shock and protect the movement. Also, the buffer 15 is formed by the inner peripheral wall of the recess 20c.
Is prevented from being displaced and deformed. Further, a grounding spring 77 is conducted to the inner body 20 through the buffer 15. Therefore, the spring 77 does not come off.

Between the winding stem connecting member 62 and the movement 30, there is provided a metal annular axial movement restricting member 42 surrounding the winding stem 60. Further, when the crown 58 is fixed to the support cylinder 56 with the screw 57, the outer surface of the crown 58 is located inside the outer peripheral surface of the guard pipe 41.

A circular opening 44 is formed at the bottom of the outer body 21, and the bottom surface 35 a of the buffer 35 is exposed therefrom. In addition, a part of the cushion covers a part of the bottom of the inner body and protrudes outward therefrom. Since the outer case 21 is made of metal, there is no inconvenience such as damage due to contact with external foreign matter, collision, and wear. Further, a fixing screw 36 for fixing the outer body 21 and the inner body 20 is screwed to the outer body 21, and a distal end portion 36 c thereof is engaged in a buffer 38 inserted into the hole 37 of the inner body 20. Therefore, even if an external impact is applied to the fixing screw, the fixing screw does not reach the inner body, and the movement, the module, and the like in the inner body are not damaged.

Further, the winding stem connecting member 62 of the screw lock crown is used.
Since the annular movement restricting member 42 is provided between the winding stem 60 and the movement 30, the connecting member 62 does not move even if an impact is applied to the crown 58. No member is damaged. Further, since the outer surface of the crown 58 is located inside the outer peripheral surface of the guard pipe 41, no impact is directly applied to the crown. Therefore, the winding stem is not damaged by the impact. Further, since the bottom surface 35a of the buffer 35 is exposed from the opening 44 of the outer shell 21 and protrudes from the bottom of the inner shell, buffering of the inner shell when the case is dropped can be obtained. Furthermore, since the buffer body 35 flexibly contacts the wrist. The feeling of wearing is improved. Further, since the end 43c of the engagement member 43 is engaged with the hole of the buffer 35, the buffer moves,
It does not come off. In the above embodiment, the fixing means is a screw, but the fixing means may be replaced with other known means such as bonding, press-fitting, brazing, or welding. Further, the buffer is preferably made of a flexible material such as polyurethane rubber, but any material can be used as long as it can absorb impact. For example, a coil spring made of metal may be used.

FIG. 10 is a sectional view showing a modification of the present invention. In this example, the fixing screw 35 is screwed into the screw portion of the inner body from the inner side of the inner body 20, the cup-shaped buffer 38 is inserted into the hole of the outer body 21, and the small-diameter end portion 36c of the screw is engaged therewith. I agree. Also in this example, the shock applied to the outer body 21 can be reduced by the buffer body 38.

FIG. 11 is a sectional view showing another modification.
In this example, the main body of the fixing screw 40 has the same diameter, the screw 47 is screwed into the screw of the inner body 20, and the cylindrical buffer 50 is fitted between the screw 46 and the buffer 38. . In this embodiment, the shock applied to the outer trunk 21 is reduced by the buffer 50.

[0028]

According to the present invention, any impact can be
Protects the components inside the case, especially the movement and draft shield,
Accidents can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a wristwatch using a case according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;

FIG. 5 is a sectional view taken along line VV of FIG. 1;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 1;

FIG. 7 is an exploded perspective view of the entire watch case according to the present invention.

FIG. 8 is an exploded perspective view of the entire watch case according to the present invention.

FIG. 9 is an exploded sectional view of a watch case according to the present invention.

FIG. 10 is a sectional view showing a first modification of the present invention.

FIG. 11 is a sectional view showing a second modified example of the present invention.

FIG. 12 is a sectional view showing a conventional watch case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner trunk 2 Outer trunk 3 Buffer 4 Fixing screw 13 Bezel 14 Cylindrical buffer 14a Step 15 Bottom buffer 16 Dial fixing part 17 Solar cell 18, 19 Packing 20 Inner trunk 20a Body 20b Bottom 20c Recess 21 Outer trunk Reference Signs List 22 band 23 connecting leg 24 top buffer 24a hole 25 windshield receiving member 25a recess 26 look ring buffer 27 look ring 27a, 27b extension 28 movement buffer 28a step 30 movement 31 antimagnetic member 32 screw 33 windshield 34 letter plate 35 Peripheral buffer 35a Bottom surface 36 Fixing screw 36a Head 36b Large diameter screw 36c Small diameter tip 37 Hole 38 Cup-shaped buffer 39 Uneven portion 40 Screw lock crown 41 Guard pipe 42 Movement restricting member 44 Opening 46 Fixing screw 47 Screw 50 Cylindrical Buffer 55 hole 56 Lifting cylinder 57 screw 58 crown 60 stem 61 screws 62 stem coupling member 63 coil spring 64 engaging hole 65 outer wall polygonal engaging portion 70 screw 71 step portion 73 annular projection 74 slopes 77 spring

Claims (21)

[Claims] 1. A wristwatch case having an elastic flat plate-shaped top cushion held between a bezel and a body, and fixing means for fixing the bezel and the body. 2. The wristwatch case according to claim 1, wherein a lower step portion is formed on a lower surface of the top buffer, and an outer peripheral portion of a windshield receiving member is inserted between the step portion and the body. 3. A step is formed on the outer periphery of the upper surface of the buffer,
The wristwatch case according to claim 1, wherein a projection at a lower portion of the outer periphery of the bezel is engaged with the step portion. 4. The wristwatch case according to claim 1, wherein the buffer has substantially the same width as the bezel. 5. The wristwatch case according to claim 1, wherein a slope is formed on an inner lower surface of the shock absorber, and the slope is in contact with a slope on an outer periphery of the windshield. 6. The wristwatch case according to claim 1, wherein the fixing member is engaged with the windshield receiving member to restrict lateral movement of the windshield receiving member. 7. The wristwatch case according to claim 2, wherein the fixing means is a screw penetrating the bezel and screwed to the body, and the screw passes through a concave portion formed on the outer periphery of the windshield receiving member. 8. A wristwatch case, characterized in that a watch ring buffer having elasticity is arranged between a windshield receiving member and a watch ring located above a dial. 9. The wristwatch case according to claim 8, wherein the dial ring has an upwardly extending extension, and a dial ring buffer is disposed between the extension and the inner wall surface of the body. 10. The wristwatch case according to claim 9, wherein the extension rises up to near the inner edge side surface of the windshield receiving member. 11. The wristwatch case according to claim 9, wherein the windshield receiving member is made of a magnetic-resistant material. 12. A wristwatch case wherein an elastic movement buffer is arranged between a dial and a dial located above a dial and a movement. 13. The watch case according to claim 12, wherein the dial ring has a downwardly extending extension, and a movement buffer is disposed between the extension and the inner wall surface of the body. 14. The wristwatch case according to claim 12, wherein the movement buffer includes a hanging step located outside the outer edge of the movement. 15. A wristwatch case wherein an elastic cylindrical buffer is arranged between the side of the movement and the side of the inner wall of the body. 16. The cylindrical shock absorber has a step for supporting a step formed on a side surface of the movement from below.
The watch case according to 5. 17. The wristwatch case according to claim 15, wherein a magnetic-resistant member is arranged between the cylindrical buffer and a side surface of the movement. 18. A wristwatch case wherein an elastic bottom cushion is disposed between the lower surface of the movement and the bottom of the inner wall of the body. 19. The watch case according to claim 18, wherein the bottom cushion is disposed in a recess formed in the bottom surface of the body. 20. The watch case according to claim 18, wherein the bottom cushion is annular. 21. The watch case according to claim 18, wherein a spring hole through which a ground spring of the movement is inserted is formed in the bottom buffer.