JP2018116009A - Exterior member and watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exterior member in which a rotation position can be easily adjusted and a watch comprising the same.SOLUTION: An exterior member comprises: an outside ring 12 in which a female screw part 22 is provided on an inner peripheral face; and an inside ring 13 arranged in the outside ring 12, in which a male screw part 15 is provided on an outer peripheral face. The female screw part 22 and the male screw part 15 are screwed mutually and the male screw part 15 and the female screw part 22 get over and engagement is released, thereby attaching the outside ring 12 and the inside ring 13 in a rotatable manner. Therefore, by only screwing the male screw part 15 and the female screw part 22, and getting over of the male screw part 15 and the female screw part 22 mutually, the outside ring 12 and the inside ring 13 can be rotatably attached in a simple manner, and in a state, the outside ring 12 and the inside ring 13 can be mutually rotated, so that a rotation position of the outside ring 12 and the inside ring 13 can be easily and correctly adjusted.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an exterior member used for an electronic device such as a wristwatch and a timepiece including the exterior member.

  For example, in a wristwatch exterior member, as described in Patent Document 1, a synthetic resin first ring to be attached to a case body of a wristwatch case and a metal first to be attached to the first ring. Two rings are known.

Japanese Patent Laid-Open No. 10-39049

  In this type of exterior member, the inner protrusion provided on the inner peripheral surface of the first ring made of synthetic resin is inserted into the groove provided on the outer peripheral surface of the case body and locked. One ring is configured to be attached to the outer periphery of the case body. In this case, rotation of the first ring with respect to the case main body is restricted by inserting a first position restricting portion provided on the lower surface of the first ring into a restriction hole provided on the upper surface of the case main body.

  In addition, the exterior member has a second protrusion formed by the engagement protrusion provided on the inner peripheral surface of the metal second ring over the outer protrusion provided on the outer peripheral surface of the first ring. The engagement protrusion of the ring is engaged with the outward protrusion of the first ring, and the second ring is attached to the first ring. In this case, the second ring is rotated with respect to the first ring by the engagement of the second position restricting portion provided on the outer periphery of the first ring with the notch provided on the outer peripheral portion thereof. It is regulated.

  In such an exterior member, when the first ring is attached to the outer periphery of the case body, the rotational position of the first ring with respect to the case body is restricted, and the second ring is attached to the first ring. At this time, since the rotational position of the second ring with respect to the first ring is restricted, there is a problem that the rotational position of the second ring with respect to the first ring cannot be adjusted.

  The problem to be solved by the present invention is to provide an exterior member capable of easily adjusting the rotational position and a timepiece including the exterior member.

  The present invention includes: an outer member having a first screw portion provided on an inner peripheral surface; and an inner member disposed in the outer member and having a second screw portion provided on the outer peripheral surface; The outer screw and the second screw portion are screwed together to fix the outer member and the inner member in a state in which the first screw portion and the second screw portion get over each other and disengage from each other. It is the exterior member characterized by having performed.

  According to the present invention, the outer member and the inner member can be easily rotated by simply screwing the first screw portion and the second screw portion so that the first screw portion and the second screw portion get over each other. In this state, the outer member and the inner member can be rotated relative to each other, so that the rotational positions of the outer member and the inner member can be easily adjusted.

It is the expansion perspective view which showed one Embodiment which applied this invention to the wristwatch. FIG. 2 is an enlarged perspective view showing a watch case of the watch shown in FIG. 1. It is the expansion perspective view which showed the principal part in the AA arrow of the wristwatch case shown by FIG.

An embodiment in which the present invention is applied to a wristwatch will be described below with reference to FIGS.
The wristwatch includes a wristwatch case 1 as shown in FIGS. The wristwatch case 1 includes a case body 2 and an exterior member 3.

  As shown in FIG. 1, a watch glass 4 is attached to the upper opening of the watch case 1, that is, the upper opening of the exterior member 3. A back cover (not shown) is attached to the lower part of the watch case 1, that is, the lower part of the case body 2. A watch module 5 is provided in the wristwatch case 1, that is, in the case body 2.

  As shown in FIG. 1, the timepiece module 5 includes a timepiece movement that moves a pointer 5a to indicate a time, a display portion that displays information such as time and date electro-optically, and a circuit that electrically drives them. Various parts (none of which are shown) necessary for a clock function such as a unit are provided. In this case, a dial plate 5 b is provided on the top of the timepiece module 5. On the outer periphery of the dial plate 5b, hour letters 5c are provided at equal intervals.

  Further, as shown in FIG. 1, band attaching portions 6 for attaching a watch band (not shown) are provided at the 12 o'clock side and the 6 o'clock side of the case body 2 of the wristwatch case, respectively. A switch portion 7 such as a crown is provided at the 3 o'clock side of the case body 2 of the wristwatch case 1. Further, push button switches 8 are provided on the 2 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side of the case body 2 of the wristwatch case 1, respectively.

  By the way, as shown in FIGS. 1-3, the case main body 2 is formed in the substantially ring shape with metals, such as stainless steel and titanium. That is, the inner peripheral surface of the case body 2 is formed in a circular shape. Band attaching portions 6 are provided on the outer peripheral surface of the case body 2 so as to protrude to the outside at the 12 o'clock side and the 6 o'clock side.

  Further, as shown in FIGS. 1 and 2, a pair of protective projections 9 that protect the switch unit 7 are provided on the outer side of the outer peripheral surface of the case body 2 so as to protrude outside. On the 3 o'clock side of the case body 2 located between the pair of protective projections 9, a switch mounting hole 7a to which the switch unit 7 is mounted is provided so as to penetrate inside and outside.

  Further, on the 2 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side of the case body 2, as shown in FIG. Is provided. Further, as shown in FIG. 3, an annular mounting recess 10 is provided at the upper end of the case body 2 so as to be open on the upper side and the inner peripheral side. A caulking fixing groove 11 is annularly provided on the inner peripheral surface of the case body 2 located below the mounting recess 10.

  On the other hand, the exterior member 3 includes an outer ring 12 as an outer member and an inner ring 13 as an inner member, as shown in FIGS. The inner ring 13, which is an inner member, is generally formed in a ring shape from a metal such as stainless steel or titanium, like the case body 2. That is, the inner ring 13 has an outer diameter that is approximately the same as the outer diameter of the case body 2 and an inner diameter that is approximately the same as the inner diameter of the case body 2.

  In this case, as shown in FIG. 3, the inner ring 13 has a configuration in which the mounting ring portion 14 is erected on the inner peripheral side of the upper surface by cutting out the upper part on the outer peripheral side. ing. A male screw portion 15 that is a second screw portion is provided on the upper side of the outer peripheral surface of the mounting ring portion 14 except for almost half of the lower side thereof. The male thread portion 15 has a threaded portion protruding from the outer peripheral surface of the mounting ring portion 14 and a screw trough portion protruding from the outer peripheral surface or slightly outward from the outer peripheral surface. Is formed.

  Further, as shown in FIG. 3, an annular mounting convex portion 16 is provided on the lower surface of the inner ring 13 so as to protrude downward. The mounting convex portion 16 is configured to fit into the mounting concave portion 10 at the upper end portion of the case body 2. On the inner peripheral surface of the mounting convex portion 16 in the inner ring 13, an annular fitting protrusion 17 that fits on the upper portion of the inner peripheral surface of the case main body 2 is provided so as to protrude from the inner side and the lower side. .

  As shown in FIG. 3, caulking portions 18 are respectively provided at predetermined locations on the outer peripheral portion of the lower surface of the fitting projection portion 17 so as to correspond to the fixing grooves 11 of the case body 2. These caulking portions 18 are fitted into the case main body 2 by caulking in a state where the mounting convex portion 16 is fitted into the mounting concave portion 10 of the case main body 2 and the fitting protrusion 17 is fitted into the inner peripheral surface of the case main body 2. The inner ring 13 is fixed to the case body 2 by biting into the fixing groove 11 and being caulked.

  On the other hand, as shown in FIGS. 2 and 3, the outer ring 12 that is an outer member is entirely formed in a ring shape from carbon resin. That is, the outer ring 12 has an outer diameter that is approximately the same as the outer diameter of the inner ring and the outer diameter of the case body 2, and an inner diameter that is the same as the inner diameter of the mounting ring portion 14 of the inner ring 13. ing.

  In this case, as shown in FIG. 3, a notch portion 20 in which the mounting ring portion 14 of the inner ring 13 is arranged is provided in an annular shape on the inner peripheral portion of the outer ring 12. That is, the notch 20 is formed open to the inner peripheral portion side and the lower portion side of the outer ring 12 except for the upper end portion thereof. As a result, on the inner peripheral side of the outer ring 12, a pressing portion 21 positioned on the upper portion of the notch portion 20 is provided corresponding to the upper end surface of the mounting ring portion 14 of the inner ring 13.

  Moreover, as shown in FIG. 3, the internal thread part 22 which is the 1st thread part with which the external thread part 15 of the inner side ring 13 is screwed in is provided in the internal peripheral surface of the notch part 20 of this outer periphery ring 12. As shown in FIG. . The female screw portion 22 is provided on almost the lower half of the inner peripheral surface of the notch portion 20. The female thread portion 22 has a threaded portion protruding from the inner peripheral surface of the cutout portion 20 and a screw trough portion being the same as the inner peripheral surface of the cutout portion 20 or slightly inside the inner peripheral surface. It protrudes to the side.

  In this case, the internal thread portion 22 of the outer ring 12 and the external thread portion 15 of the inner ring 13 have substantially the same axial length as shown in FIG. The length of both of the outer ring 12 and the inner ring 13 in the axial direction facing each other, that is, the length in the axial direction (vertical direction) of the mounting ring portion 14 of the inner ring 13 is slightly shorter. Is formed.

  Thereby, when the inner ring 13 is arranged inside the outer ring 12, the male screw part 15 and the female screw part 22 are screwed together as shown in FIG. By continuing to tighten, the male screw portion 15 and the female screw portion 22 are configured to overcome each other and disengage. For this reason, the outer ring 12 and the inner ring 13 are configured to be attached so as to be rotatable relative to each other. With this configuration, the outer ring 12 and the inner ring 13 do not fall off.

  In this case, the carbon resin of the outer ring 12 is one in which carbon fiber layers are alternately laminated and hardened with a synthetic resin such as an epoxy resin. That is, the carbon resin has a structure in which carbon fibers are arranged in one direction to form a carbon fiber layer, and the carbon fiber layers are alternately shifted by 90 degrees to laminate a large number of carbon fiber layers. ing.

  In this case, the carbon resin layer is formed by laminating the carbon fiber layer located on the uppermost surface thereof by shifting the fiber direction by 45 degrees with respect to the fiber direction of the carbon fiber layer located below the carbon resin layer. It has come to appear. Further, a stamp (not shown) is provided at a predetermined portion of the outer ring 12.

  Incidentally, as shown in FIG. 3, the positions of the outer ring 12 and the inner ring 13 in the rotational direction are restricted by the rotation restricting portion 23. That is, the rotation restricting portion 23 includes a pin-shaped member 23 a, a through hole 23 b provided vertically through the outer ring located at the 12 o'clock side of the inner ring 13, and the 12 o'clock of the outer ring 12. A pin insertion hole 23c having a concave shape with respect to the through hole 23b of the inner ring 13 is provided at a location on the outer peripheral side located on the side.

  In this case, as shown in FIG. 3, the pin-shaped member 23a is formed with a length slightly shorter than the length of both the through hole 23b and the pin insertion hole 23c. Further, the inner diameter of the through hole 23b of the inner ring 13 is formed to be approximately the same as the outer diameter of the pin-like member 23a. Similarly, the pin insertion hole 23c of the outer ring 12 has an inner diameter that is substantially the same as the outer diameter of the pin-shaped member 23a.

  Thereby, as shown in FIG. 3, the rotation restricting portion 23 rotates the outer ring 12 and the inner ring 13 with each other while the outer ring 12 and the inner ring 13 are attached in a rotatable state. When the through hole 23b of the inner ring 13 and the pin insertion hole 23c of the outer ring 12 are matched, the pin-like member 23a is inserted into the pin insertion hole 23c from the lower side of the inner ring 13 through the through hole 23b and bonded. By being bonded by an agent (not shown), the rotational positions of the outer ring 12 and the inner ring 13 are restricted.

  Further, as shown in FIG. 3, an elastic member 24 is disposed between the upper end portion of the inner ring 13 and the presser portion 21 provided corresponding to the upper portion of the outer ring 12. The elastic member 24 is formed in a flat ring shape from an elastic synthetic resin such as urethane resin or silicone resin.

  That is, as shown in FIG. 3, the elastic member 24 has an outer diameter that is substantially the same as the inner diameter of the notch portion 20 of the outer ring 12, and an inner diameter that is substantially the same as the inner diameter of the pressing portion 21 of the outer ring 12. It is formed in size. Further, the thickness of the elastic member 24 is substantially the same as the distance between the lower end portion of the male screw portion 15 and the upper end portion of the female screw portion 22 in a state where the outer ring 12 and the inner ring 13 are rotatably attached. It is formed in size.

  Thereby, as shown in FIG. 3, when the outer ring 12 and the inner ring 13 are attached in a rotatable state, the elastic member 24 has an upper end portion of the inner ring 13 and the outer ring 12 corresponding thereto. It is comprised so that it may be pinched | interposed elastically between the holding parts 21. For this reason, the elastic member 24 elastically pushes the upper end portion of the inner ring 13 and the presser portion 21 of the outer ring 12 and elastically presses the lower end portion of the male screw portion 15 and the upper end portion of the female screw portion 22. At the same time, a gap is formed between the lower surface of the outer ring 12 and the upper surface of the inner ring 13.

  Further, between the lower portion of the female screw portion 22 and the lower portion of the inner peripheral surface of the inner ring 13 corresponding thereto, as shown in FIG. 3, an elastic bond that elastically bonds the outer ring 12 and the inner ring 13 together. Agent 25 is provided. The elastic adhesive 25 has elasticity in a dry state, and is configured to elastically bond the outer ring 12 and the inner ring 13.

  That is, as shown in FIG. 3, the elastic adhesive 25 is formed when the male screw portion 15 and the female screw portion 22 are screwed with each other, and the male screw portion 15 and the female screw portion 22 get over each other to disengage. Further, it is arranged so as to bite between the lower surface of the outer ring 12 and the upper surface of the inner ring 13 and elastically restricts mutual rotation of the outer ring 12 and the inner ring 13.

  Thereby, as shown in FIG. 3, the elastic adhesive 25 is inserted between the lower surface of the outer ring 12 and the upper surface of the inner ring 13, so that when the elastic adhesive 25 is dried, The lower surface of the ring 12 and the upper surface of the inner ring 13 are elastically pushed out, and the lower end portion of the male screw portion 15 and the upper end portion of the female screw portion 22 are elastically pressed, and the outer ring 12 and the inner ring 13 are mutually connected. Is configured to elastically restrict the rotation of the.

Next, the operation of the wristwatch case 1 of such a wristwatch will be described.
When the watch case 1 is assembled, first, the exterior member 3 is assembled. In this case, the elastic member 24 is disposed in advance on the upper end portion of the attachment ring portion 14 of the inner ring 13, and the elastic adhesive 25 is applied to the lower portion of the outer peripheral surface of the attachment ring portion 14 of the inner ring 13.

  In this state, the mounting ring portion 14 of the inner ring 13 is made to correspond to the lower side of the cutout portion 20 of the outer ring 12, and the male screw portion 15 of the mounting ring portion 14 and the female screw portion 22 of the cutout portion 20 are mutually connected. Screw together. At this time, the screw thread portion of the male screw portion 15 protrudes from the outer peripheral surface of the mounting ring portion 14, and the screw trough portion is the same as the outer peripheral surface of the mounting ring portion 14, or slightly protrudes outward from the outer peripheral surface. ing. Further, the thread crest portion of the female screw portion 22 protrudes from the inner peripheral surface of the notch portion 20, and the screw trough portion is the same as the inner peripheral surface of the notch portion 20, or slightly inside the inner peripheral surface. Protruding.

  For this reason, when the male screw portion 15 and the female screw portion 22 are screwed together, the thread crest portion of the male screw portion 15 does not contact the inner peripheral surface of the cutout portion 20 of the outer ring 12. The screw thread portion of the female screw portion 22 does not contact the outer peripheral surface of the mounting ring portion 14 of the inner ring 13, and the male screw portion 15 and the female screw portion 22 are smoothly and satisfactorily engaged.

  When the male screw portion 15 and the female screw portion 22 are continuously tightened, the male screw portion 15 and the female screw portion 22 get over each other and disengage from each other. In this case, the female screw portion 22 of the outer ring 12 and the male screw portion 15 of the inner ring 13 have substantially the same length in the axial direction, and both the female screw portion 22 and the male screw portion 15 have the same length. The outer ring 12 and the inner ring 13 are formed to be slightly shorter than the axial length of the inner ring 13 facing each other, that is, the axial length of the mounting ring portion 14 of the inner ring 13.

  For this reason, when the male screw portion 15 and the female screw portion 22 are screwed together and kept tightening, the male screw portion 15 and the female screw portion 22 get over each other and disengage. Thereby, the outer ring 12 and the inner ring 13 are attached so as to be rotatable relative to each other. At this time, the elastic member 24 disposed between the upper end portion of the inner ring 13 and the presser portion 21 of the outer ring 12 corresponding thereto elastically connects the upper end portion of the inner ring 13 and the presser portion 21 of the outer ring 12. Press to spread.

  Therefore, the lower end portion of the male screw portion 15 and the upper end portion of the female screw portion 22 are elastically pressed, and the lower surface of the outer ring 12 is lifted from the upper surface of the inner ring 13, so that the lower surface of the outer ring 12 and the inner ring 13 are A gap is formed between the top surface. At this time, the elastic adhesive 25 is disposed so as to bite between the lower surface of the outer ring 12 and the upper surface of the inner ring 13.

  In this state, the outer ring 12 and the inner ring 13 are rotated relative to each other, and the rotational positions of the outer ring 12 and the inner ring 13 are adjusted and aligned. Then, the through hole 23b of the inner ring 13 and the pin insertion hole 23c of the outer ring 12 correspond to each other, and the mesh direction as the carbon resin pattern of the outer ring 12 is aligned.

  That is, as the alignment of the mesh direction of the carbon resin, for example, the fiber direction of the carbon fiber is inclined at an angle of 90 degrees or 45 degrees with respect to a straight line connecting 12 o'clock and 6 o'clock, or 12 o'clock. And the fiber direction of the carbon fiber are arranged in parallel to a straight line connecting 6:00 and 6:00. At this time, the marking (not shown) of the outer ring 12 is aligned.

  Thus, when the rotational directions of the outer ring 12 and the inner ring 13 are aligned and the through hole 23b of the inner ring 13 and the pin insertion hole 23c of the outer ring 12 correspond, The pin-shaped member 23a is inserted into the through-hole 23b of the inner ring 13 from the lower side of the inner ring 13, and the inserted pin-shaped member 23a is inserted into the pin insertion hole 23c of the outer ring 12, and an adhesive (not shown) ). Thereby, the rotational positions of the outer ring 12 and the inner ring 13 are restricted.

  In this state, when the elastic adhesive 25 is dried, the dried elastic adhesive 25 is inserted between the lower surface of the outer ring 12 and the upper surface of the inner ring 13, so that the elastic adhesive 25 is moved to the outer side. The lower surface of the ring 12 and the upper surface of the inner ring 13 are elastically expanded, and the rotation of the outer ring 12 and the inner ring 13 is elastically restricted by the dried elastic adhesive 25.

  Thereby, the inner ring 13 is attached in the outer ring 12, and the exterior member 3 is assembled. When attaching the exterior member 3 to the case body 2, the mounting protrusion 16 provided on the lower surface of the inner ring 13 of the exterior member 3 is fitted into the mounting recess 10 at the upper end of the case body 2, An annular fitting protrusion 17 provided on the inner peripheral surface of the mounting convex portion 16 in the ring 13 is fitted to the upper portion of the inner peripheral surface of the case body 2.

  In this state, with the rotational position of the exterior member 3 and the case body 2 adjusted to match the rotational position, the crimping portion 18 provided at a predetermined position on the outer peripheral portion of the lower surface of the fitting projection 17 is crimped. To squeeze into the fixing groove 11 of the case body 2. As a result, the inner ring 13 is fixed to the case body 2 and the exterior member 3 is attached to the case body 2. As a result, the watch case 1 is assembled.

  When the watch glass 4 is attached to the watch case 1, the watch glass 4 is mounted in the inner ring 13 of the exterior member 3 from above. When the watch module 5 is assembled in the watch case 1, the button main body 2 is previously provided with a plurality of button mounting holes 8a provided on the 2 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side. The push button switches 8 are respectively attached, and in this state, the timepiece module 5 is inserted into the case body 2 from the lower side of the case body 2 and arranged.

  In this state, the switch portion 7 such as a crown is inserted into the timepiece module 5 and attached to the switch attachment hole 7 a provided on the 3 o'clock side of the case body 2. Then, a back cover (not shown) is attached to the lower part of the case body 2. Thereby, the wristwatch is assembled.

  In such a wristwatch, when the exterior member 3 receives an impact from the outside, the engagement between the male screw portion 15 and the female screw portion 22 is released, so that the upper end portion of the inner ring 13 of the exterior member 3 corresponds to this. The impact can be buffered by the elastic member 24 disposed between the pressing portion 21 of the outer ring 12. Thereby, even if the outer ring 12 is made of carbon resin, the outer ring 12 can be prevented from being damaged by an impact.

  In this case, when the impact from the outside is buffered by the elastic member 24, the outer ring 12 is pushed down with respect to the inner ring 13 because the engagement between the male screw portion 15 and the female screw portion 22 is released. Since the elastic adhesive 25 is inserted between the lower surface of the inner ring 12 and the upper surface of the inner ring 13, the impact received by the outer ring 12 is buffered by the elasticity of the elastic adhesive 25. Can also prevent the outer ring 12 from being damaged.

  Further, in this wristwatch, the pin-shaped member 23a of the rotation restricting portion 23 is inserted into the through hole 23b of the inner ring 13 and the pin insertion hole 23c of the outer ring 12, and the rotational positions of the outer ring 12 and the inner ring 13 are changed. By being regulated, the outer ring 12 does not rotate relative to the inner ring 13 even when the exterior member 3 receives an impact from the outside.

  At this time, the caulking portion 18 provided on the inner ring 13 of the exterior member 3 bites into the fixing groove 11 of the case main body 2 by caulking, and the inner ring 13 is fixed to the case main body 2, thereby When the member 3 receives an impact from the outside, the impact is not transmitted to the case body 2, and the exterior member 3 does not rotate with respect to the case body 2 due to the impact.

  Thus, according to the exterior member 3 of the wristwatch case 1, the female thread portion 22 is disposed on the inner peripheral surface, the outer ring 12 is disposed in the outer ring 12, and the male thread portion 15 is disposed on the outer peripheral surface. And the external thread 12 and the internal thread part 22 are screwed together so that the external thread part 15 and the internal thread part 22 get over each other and disengage from each other. By attaching 13 in a rotatable state, the rotational positions of the outer ring 12 and the inner ring 13 can be adjusted easily and accurately.

  That is, in the exterior member 3 of the watch case 1, when the outer ring 12 and the inner ring 13 are attached, the male screw portion 15 and the female screw portion 22 are screwed together so that the male screw portion 15 and the female screw portion 22 get over each other. The outer ring 12 and the inner ring 13 can be easily attached in a rotatable state, and the outer ring 12 and the inner ring 13 can be rotated relative to each other in this state. The mutual rotational position with the ring 13 can be adjusted easily and accurately.

  In this case, the female screw portion 22 is provided on the lower side of the inner peripheral surface of the outer ring 12 so as to protrude from the inner peripheral surface to the inner side, and the male screw portion 15 is provided on the upper side of the outer peripheral surface of the inner ring 13 from the outer peripheral surface. Since the female screw portion 22 does not contact the outer peripheral surface of the inner ring 13 and the male screw portion 15 does not contact the inner peripheral surface of the outer ring 12, the male screw portion 15 and the female screw are provided. The part 22 can be screwed smoothly and reliably.

  That is, the male thread portion 15 has a threaded portion protruding from the outer peripheral surface of the mounting ring portion 14 and a screw trough portion being the same as the outer peripheral surface of the mounting ring portion 14 or slightly outside the outer peripheral surface. The threaded portion of the female screw portion 22 protrudes from the inner peripheral surface of the notch portion 20, and the valley portion of the screw is the same as the inner peripheral surface of the notch portion 20, or from the inner peripheral surface thereof. In addition, the male screw portion 15 and the female screw portion 22 can be smoothly and reliably screwed together by being slightly protruded to the inner side.

  That is, when the male screw portion 15 and the female screw portion 22 are screwed together, the thread crest portion of the male screw portion 15 does not contact the inner peripheral surface of the cutout portion 20 of the outer ring 12, and the female screw Since the crest of the screw in the portion 22 does not contact the outer peripheral surface of the mounting ring portion 14 of the inner ring 13, the male screw portion 15 and the female screw portion 22 can be smoothly and reliably screwed together.

  Further, the female screw portion 22 of the outer ring 12 and the male screw portion 15 of the inner ring 13 have substantially the same length in the axial direction, and both the female screw portion 22 and the male screw portion 15 are outside. Since the axial length of the ring 12 and the inner ring 13 facing each other, that is, the axial length of the mounting ring portion 14 of the inner ring 13 is formed slightly shorter, the male screw portion 15 and the female screw portion 22 Can be surely removed.

  That is, when the female screw portion 22 and the male screw portion 15 are continuously screwed together and tightened, the male screw portion 15 and the female screw portion 22 get over each other, and the meshing between the male screw portion 15 and the female screw portion 22 is ensured. The outer ring 12 and the inner ring 13 can be attached in a rotatable state.

  Further, the exterior member 3 includes a rotation restricting portion 23 that restricts the position of the outer ring 12 and the inner ring 13 in the rotation direction, so that the outer ring 12 and the inner ring 13 are rotatably attached. Even in the state where the rotational positions of the outer ring 12 and the inner ring 13 are adjusted, the rotation restricting portion 23 can reliably regulate the positions of the outer ring 12 and the inner ring 13 in the rotational direction.

  In this case, the rotation restricting portion 23 includes a pin-like member 23 a, a through hole 23 b provided in the inner ring 13, and a concave pin insertion hole 23 c provided in the outer ring 12 with respect to the through hole 23 b of the inner ring 13. By simply inserting the pin-like member 23a into the through hole 23b of the inner ring 13 and the pin insertion hole 23c of the outer ring 12, the rotation of the outer ring 12 and the inner ring 13 is reliably restricted. can do.

  That is, the rotation restricting portion 23 can make the through hole 23b of the inner ring 13 correspond to the pin insertion hole 23c of the outer ring 12 when the rotational positions of the outer ring 12 and the inner ring 13 are adjusted. For this reason, with the rotational positions of the outer ring 12 and the inner ring 13 adjusted, the pin-like member 23a is inserted into the through hole 23b of the inner ring 13 and the pin insertion hole 23c of the outer ring 12, and an adhesive is used. By making it adhere | attach, rotation with the outer side ring 12 and the inner side ring 13 can be controlled reliably.

  In the exterior member 3, since the elastic member 24 is disposed between the upper end portion of the inner ring 13 and the presser portion 21 provided on the upper portion of the outer ring 12 correspondingly, the elastic member 24 24, the upper end portion of the inner ring 13 and the presser portion 21 of the outer ring 12 can be elastically expanded. Therefore, when the exterior member 3 receives an impact from the outside, the impact is buffered by the elastic member 24. This can prevent the outer ring 12 from being damaged by impact.

  In the exterior member 3, the elastic adhesive 25 is provided between the lower portion of the female screw portion 22 and the inner peripheral surface of the inner ring 13 corresponding thereto, and elastically bonds the outer ring 12 and the inner ring 13. Since the elastic adhesive 25 can be disposed between the lower surface of the outer ring 12 and the upper surface of the inner ring 13 when the outer ring 12 receives an impact from the outside. The shock can be reliably and satisfactorily buffered by the elastic member 24 and the elastic adhesive 25.

  That is, since the elastic adhesive 25 has elasticity even when dried, the outer ring 12 receives an impact from the outside, and when the elastic member 24 cushions the impact, the outer ring 12 By being pressed down against the ring 13 and pressed against the elastic adhesive 25, the impact received by the outer ring 12 can be reliably and satisfactorily buffered together with the elastic member 24 by the elasticity of the elastic adhesive 25. Therefore, it is possible to reliably prevent the outer ring 12 from being damaged.

  Furthermore, in this exterior member 3, since the outer ring 12 is formed of carbon resin, the hardness of the outer ring 12 can be ensured and the weight of the outer ring 12 can be reduced. The weight of the exterior member 3 can be reduced, and the weight of the watch case 1 can be reduced.

  That is, the carbon resin is obtained by alternately laminating carbon fiber layers and solidifying them with a synthetic resin such as an epoxy resin. The carbon fibers are arranged in one direction to form a carbon fiber layer. Since the structure is formed by laminating a large number of carbon fiber layers by alternately shifting the directions by 90 degrees, the hardness is high and the weight can be reduced.

  In this case, the carbon resin has a good mesh pattern because the carbon fiber layer located on the uppermost surface is laminated with the fiber direction shifted by 45 degrees with respect to the fiber direction of the lower carbon fiber layer. Therefore, the design can be enhanced, and the mesh direction with respect to the watch case 1 can be freely selected and set, so that the design of the entire watch case 1 can be enhanced.

  Further, since the outer ring 12 is made of carbon resin, the female screw portion has a high hardness and is brittle with respect to a metal material such as stainless steel, and the female screw portion 22 has poor processing dimensional accuracy. The outer ring 12 and the inner ring 13 can be attached in a state in which the engagement between the female screw portion 22 and the male screw portion 15 is disengaged. Therefore, even if the outer ring 12 receives an impact from the outside, the internal thread portion 22 can be prevented from being damaged by the impact.

  In the above-described embodiment, the case where the outer ring 12 is formed of a carbon resin has been described. However, the present invention is not limited to this, and any brittle material may be used. For example, a material such as ceramic or glass (sapphire glass) is used. May be formed. The first screw portion may be a female screw portion, and the second screw portion may be a male screw portion.

  In the above-described embodiment, the case where the present invention is applied to a wristwatch has been described. However, the present invention is not necessarily a wristwatch, and can be applied to various types of watches such as a travel watch, an alarm clock, a table clock, and a wall clock. .

  Furthermore, the present invention does not necessarily need to be a watch, and can be applied to an arm mounting device that is used by being mounted on an arm, and can also be widely applied to portable electronic devices such as a pedometer.

As mentioned above, although one Embodiment of this invention was described, this invention is not restricted to this, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
The invention according to claim 1 includes an outer member having a first screw portion provided on an inner peripheral surface, and an inner member disposed in the outer member and having a second screw portion provided on the outer peripheral surface. The first screw portion and the second screw portion are screwed together so that the first screw portion and the second screw portion get over each other and disengage from each other. It is an exterior member characterized by fixing the inner member.

  According to a second aspect of the present invention, in the exterior member according to the first aspect, the first screw portion is provided on the lower side of the inner peripheral surface of the outer member so as to protrude from the inner peripheral surface to the inner side, The second screw portion is an exterior member that is provided on the outer peripheral surface of the inner member so as to protrude from the outer peripheral surface to the outside.

  According to a third aspect of the present invention, in the exterior member according to the second aspect, the first screw portion and the second screw portion have substantially the same length in the axial direction, and both lengths thereof are the same. The outer member is formed shorter than the axial length of the outer member and the inner member facing each other.

  According to a fourth aspect of the present invention, in the exterior member according to any one of the first to third aspects, a rotation restricting portion that restricts the position of the outer member and the inner member in the rotation direction is provided. It is the exterior member characterized by these.

  Invention of Claim 5 is the exterior member in any one of Claims 1-4. The upper end part of the said inner member and the press part provided in the upper part of the said outer member corresponding to this, The exterior member is characterized in that an elastic member is disposed therebetween.

  The invention according to claim 6 is the exterior member according to any one of claims 1 to 5, wherein the exterior member is provided between a lower portion of the first screw portion and an inner peripheral surface of the inner member corresponding thereto. The outer member is provided with an elastic adhesive that elastically bonds the outer member and the inner member.

  The invention according to claim 7 is the exterior member according to any one of claims 1 to 6, wherein the outer member is formed of a carbon resin.

  The invention according to claim 8 is a timepiece including the exterior member according to any one of claims 1 to 7.

DESCRIPTION OF SYMBOLS 1 Watch case 2 Case main body 3 Exterior member 12 Outer ring 13 Inner ring 14 Mounting ring part 15 Male thread part 18 Caulking part 20 Notch part 21 Presser part 22 Female thread part 23 Rotation | regulation control part 23a Pin-shaped member 23b Through-hole 23c Pin insertion hole 24 Elastic member 25 Elastic adhesive

Claims (8)

An outer member having a first threaded portion provided on the inner peripheral surface;
An inner member disposed in the outer member and having a second threaded portion provided on the outer peripheral surface;
With
The first screw portion and the second screw portion are screwed to each other so that the first screw portion and the second screw portion get over each other and disengage from each other, and the outer member and the inner screw An exterior member characterized by fixing the member.   2. The exterior member according to claim 1, wherein the first screw portion is provided on the lower side of the inner peripheral surface of the outer member so as to protrude from the inner peripheral surface to the inner side, and the second screw portion is provided on the inner member. An exterior member characterized by being provided on the upper side of the outer peripheral surface so as to protrude from the outer peripheral surface to the outside.   3. The exterior member according to claim 2, wherein the first screw portion and the second screw portion have substantially the same length in the axial direction, and both lengths thereof are the outer member and the inner member. The exterior member is formed shorter than the length in the axial direction facing each other.   4. The exterior member according to claim 1, further comprising a rotation restricting portion that restricts a position in a rotation direction between the outer member and the inner member. 5.   The exterior member according to any one of claims 1 to 4, wherein an elastic member is disposed between an upper end portion of the inner member and a presser portion provided correspondingly to the upper portion of the outer member. The exterior member characterized by having.   The exterior member according to any one of claims 1 to 5, wherein the outer member and the inner member are provided between a lower portion of the first screw portion and an inner peripheral surface of the inner member corresponding thereto. And an elastic member that elastically bonds to each other.   The exterior member according to any one of claims 1 to 6, wherein the outer member is made of a carbon resin. A timepiece comprising the exterior member according to claim 1.

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