JP7416028B2 - Exterior parts and clocks - Google Patents

Description

The present invention relates to an exterior member used for an electronic device such as a wristwatch or a personal digital assistant, and a timepiece equipped with the same.

For example, in the case of an exterior member for a wristwatch, as described in Patent Document 1, carbon fiber is used as a reinforcing material, and the carbon fibers are laminated in the front and back directions to form a carbon fiber reinforced resin sheet. A structure in which a thermosetting resin is provided on the front and back surfaces of a fiber-reinforced resin sheet is known.

Japanese Patent Application Publication No. 2005-114495

The exterior members of such wristwatches have a structure in which thermosetting resin is provided on the front and back surfaces of a carbon fiber reinforced resin sheet in which carbon fibers are laminated in the front and back directions, so even if weight reduction can be achieved, There is a problem that sufficient strength cannot be obtained and impact resistance cannot be ensured.

The problem to be solved by the present invention is to provide an exterior member that can increase strength and improve impact resistance, and a timepiece equipped with the exterior member.

The present invention includes an exterior main body in which first fiber-reinforced resin sheets are laminated, and a protective member provided on a laminated surface of the first fiber-reinforced resin sheets of the exterior main body, the protective member comprising: The exterior member is a second fiber-reinforced resin sheet in which fibers are arranged in a direction crossing the lamination direction of the first fiber-reinforced resin sheet.

According to this invention, strength can be increased and impact resistance can be improved.

1 is an enlarged perspective view showing an embodiment of a wristwatch to which the present invention is applied. FIG. 2 is an exploded perspective view of the wristwatch case shown in FIG. 1; 3 is an enlarged perspective view showing an exterior member of the wristwatch case shown in FIG. 2. FIG. FIG. 4 is an enlarged perspective view showing the fiber direction of a third fiber-reinforced resin sheet provided on each surface of a protrusion and a band attaching portion in the exterior member shown in FIG. 3. FIG. FIG. 4 is an enlarged side view of the exterior member shown in FIG. 3 when viewed from the 3 o'clock side. FIG. 2 is an enlarged sectional view taken along the line AA of the protrusion on the 9 o'clock side in the wristwatch case shown in FIG. 1; FIG. 5 is an enlarged cross-sectional view taken along line BB of the protrusion on the 9 o'clock side in the exterior member shown in FIG. 4; FIG. 5 is an enlarged cross-sectional view taken along the line CC of the 6 o'clock side band attachment part of the exterior member shown in FIG. 4;

An embodiment in which the present invention is applied to a wristwatch will be described below with reference to FIGS. 1 to 8.
This wristwatch includes a wristwatch case 1, as shown in FIG. At the 12 o'clock side and the 6 o'clock side of this wristwatch case 1, band attachment parts 2 to which a watch band (not shown) is attached are provided to protrude, respectively. Further, switch portions 3 are provided at five locations of the wristwatch case 1 at 2 o'clock side, 3 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side.

This wristwatch case 1 includes a lower case 4, an upper case 5, and an exterior member 6, as shown in FIGS. 1 and 2. The lower case 4 has a watch module (not shown) disposed therein, and is formed into a cylindrical shape with a bottom made of metal such as stainless steel or hard synthetic resin. A switch mounting hole 4a into which the switch portion 3 is mounted is provided in each of the 2 o'clock side, 3 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side wall portion of the lower case 4, respectively.

As shown in FIGS. 1 and 2, the upper case 5 has a watch glass 7 attached to its inner peripheral surface via a glass packing 7a (see FIG. 6), and is made of metal such as stainless steel or hard synthetic resin. It is almost ring-shaped. The upper case 5 is configured to be placed on top of the lower case 4 with a waterproof ring 5a (see FIG. 6) placed between its lower surface and the upper surface of the lower case 4.

In this case, as shown in FIGS. 1 and 2, screw attachment portions 8 are provided on each outer surface of the upper case 5 on the 1 o'clock side, 5 o'clock side, 7 o'clock side, and 11 o'clock side, respectively. These screw attachment parts 8 are provided in a semicircular groove part 8a provided along the vertical direction on the outer surface of the upper case 5, and in a lower part of this groove part 8a, and protrude in a semicircular shape from inside the groove part 8a. The disc part 8b has a structure in which a screw insertion hole 8c is provided in the center of the disc part 8b.

Thereby, as shown in FIGS. 1 and 2, in the upper case 5, the threaded part 9a of the threaded member 9 is inserted into the threaded insertion hole 8c of the threaded mounting part 8, and the threaded part 9a of the threaded member 9 is inserted into the threaded hole 11a of the exterior member 6, which will be described later. When screwed in, it is pressed against the exterior member 6 by the screw head 9b, thereby covering the upper part of the lower case 4 and being attached to the upper part of the exterior member 6.

As shown in FIGS. 1 and 2, the exterior member 6 is arranged with the lower case 4 inserted therein from above, and includes a substantially ring-shaped exterior body 10 disposed around the outer periphery of the lower case 4. It is equipped with A switch insertion hole 10a in which the switch head of the switch unit 3 is disposed is provided in each of the 2 o'clock side, 3 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side wall portions of the exterior main body 10 in the lower case 4. The switch mounting holes 4a are provided corresponding to the plurality of switch mounting holes 4a provided in the switch mounting holes 4a.

Further, as shown in FIGS. 2 to 4 and 6, on the 3 o'clock side and the 9 o'clock side of the inner circumferential surface of this exterior main body 10, retaining recesses 10b are opened on the inner circumferential surface and the upper end surface. It is provided. As shown in FIG. 6, these retaining recesses 10b are formed in the lower case when the engaging protrusions 4b provided at the 3 o'clock side and the 9 o'clock side on the outer peripheral surface of the lower case 4 are respectively inserted from above. The lower end portions of the respective engaging protrusions 4b abut and are locked with the lower end portions in the retaining recesses 10b, thereby preventing the lower case 4 from slipping out below the exterior member 6.

Further, as shown in FIGS. 1 to 3, at each location on the top surface of this exterior body 10 at the 1 o'clock side, 5 o'clock side, 7 o'clock side, and 11 o'clock side, there are circles for the screw attachment portions 8 of the upper case 5. Mounting recesses 11 are respectively provided in which the plate portions 8b are placed. Each of these mounting recesses 11 is provided with a screw hole 11a into which a screw portion 9a of the screw member 9 is screwed. As a result, when the lower case 4 is disposed within the exterior body 10 of the exterior member 6 and the upper case 5 is placed on the exterior member 6 covering the upper part of the lower case 4, the screw attachment of the upper case 5 is performed. The disc portion 8b of the portion 8 is arranged within the mounting recess 11 of the exterior member 6.

That is, as shown in FIGS. 1 to 3, in the exterior member 6, the screw insertion hole 8c provided in the disk portion 8b of the screw attachment portion 8 of the upper case 5 is connected to the screw hole 11a of the attachment recess 11 of the exterior main body 10. In this state, the threaded part 9a of the screw member 9 is screwed into the threaded hole 11a of the mounting recess 11 from the screw insertion hole 8c of the disc part 8b, so that the screw head 9b is attached to the upper case. 5 is configured to be pressed onto the exterior main body 10.

In this case, as shown in FIGS. 1 to 3, the screw head 9b of the screw member 9 is inserted into the upper case 5 when the screw portion 9a is screwed into the screw hole 11a from the screw insertion hole 8c and tightened. The disk portion 8b of the screw attachment portion 8 is configured to be pressed into the attachment recess 11 of the exterior member 6. As a result, as shown in FIG. 6, the lower case 4 is in a state where the lower end of each engagement protrusion 4b is in contact with the lower end of the retaining recess 10b of the exterior main body 10 and is locked. It is configured to be held down and fixed within the exterior member 6 by.

Further, as shown in FIGS. 1 and 2, protrusions 12 are provided at the 3 o'clock side and the 9 o'clock side of the outer circumferential surface of the exterior main body 10, respectively, so as to protrude laterally. There is. In this case, the protrusion 12 on the 3 o'clock side protects the switch head of the switch section 3, and is provided between the 2 o'clock side and the 4 o'clock side. A switch insertion hole 10a in which the switch head of the switch section 3 is disposed is provided in the center of the 3 o'clock side protrusion 12. The protrusion 12 on the 9 o'clock side is provided between the 8 o'clock side and the 10 o'clock side.

Further, as shown in FIGS. 2 to 5, band attachment parts 2, which are protrusions and attachment protrusions, protrude outward from the 12 o'clock side and the 6 o'clock side of the exterior main body 10, respectively. It is provided. These band attachment parts 2 are to which watch bands (not shown) are attached, and band attachment holes 2a are provided in the direction along the outer periphery of the exterior main body 10, respectively. That is, although not shown in the drawings, the band attachment portion 2 is configured such that a watch band can be attached by inserting a connecting member such as a spring bar provided at the end of the watch band into the band attachment hole 2a.

By the way, as shown in FIGS. 4 and 5, the exterior main body 10 has a structure in which first fiber-reinforced resin sheets 13, which are first fiber-reinforced resin sheets, are sequentially laminated up and down, except for the band attachment part 2. It has become. That is, the first fiber-reinforced resin sheet 13 is a sheet in which carbon fibers or glass fibers are arranged and hardened with a synthetic resin.

In this case, the first fiber-reinforced resin sheet 13 may be formed by laminating only sheets in which carbon fibers are arranged, or only sheets in which glass fibers are arranged, as shown in FIGS. 4 and 5. Each layer may be colored, or a sheet in which carbon fibers are arranged and a sheet in which glass fibers are arranged may be combined and laminated. That is, the first fiber-reinforced resin sheet 13 in which carbon fibers are arranged becomes black, and the first fiber-reinforced resin sheet 13 in which glass fibers are arranged and colored can be colored.

In addition, as shown in FIGS. 4 and 5, the first fiber-reinforced resin sheets 13 are stacked in such a way that the fiber arrangement direction is alternately crossed in order to ensure the strength of the exterior main body 10 when stacking them vertically. It is desirable to Furthermore, in the first fiber-reinforced resin sheet 13, examples of the synthetic resin for hardening the fibers include polycarbonate resin, ABS resin, epoxy resin, and polyether resin.

Therefore, as shown in FIGS. 4 and 5, this exterior main body 10 is made by stacking the first fiber-reinforced resin sheets 13 vertically and fixing the synthetic resin of each sheet to each other by thermocompression bonding, thereby increasing the overall strength. It is formed into a high ring shape. Further, the exterior main body 10 is formed into a substantially ring shape, and is formed into a desired shape by cutting the outer circumferential surface and the inner circumferential surface.

In this case, each of the projections 12 on the 3 o'clock side and the 9 o'clock side of the exterior body 10 is formed by sequentially laminating the first fiber-reinforced resin sheets 13 vertically, as shown in FIGS. 6 and 7, similarly to the exterior body 10. It has a similar structure. In addition, each band attachment part 2 on the 12 o'clock side and the 6 o'clock side of the exterior main body 10 is a reinforced part made by wrapping a second fiber reinforced resin sheet 14 in a cylindrical shape, as shown in FIGS. 3 to 5 and 8. It is equipped with 15.

That is, as shown in FIGS. 3 to 5 and 8, the reinforcing portion 15 of the band attachment portion 2 is formed by reinforcing the second fiber reinforcement around the band attachment hole 2a provided along the outer periphery of the exterior main body 10. It is formed into a cylindrical shape in which resin sheets 14 are concentrically wound and laminated in multiple layers. In this case, the second fiber-reinforced resin sheet 14 may be a glass fiber-reinforced resin sheet in which glass fibers are arranged, but is preferably a carbon fiber-reinforced resin sheet in which carbon fibers are arranged.

Further, as shown in FIGS. 3 to 5 and 8, the carbon fiber direction of the second fiber reinforced resin sheet 14 when wound into a cylinder is relative to the axial direction of the band attachment hole 2a, which is the cylinder axis direction. They are formed in intersecting or orthogonal directions. That is, when the second fiber-reinforced resin sheet 14 pulls the watch band (not shown) attached to the band attachment part 2 in its longitudinal direction, the fibers of the second fiber-reinforced resin sheet 14 are They are arranged in the direction in which the force is applied.

In this case, as shown in FIGS. 3 to 5 and 8, when the second fiber-reinforced resin sheet 14 is wound concentrically, the fibers are laminated and wound so that the fiber arrangement directions alternately cross each other. , is formed to have a cylindrical shape. Alternatively, it is formed into a cylindrical shape by being layered and wound in a direction perpendicular to the axial direction of the band attachment hole 2a in which the fiber arrangement direction is the cylindrical axis direction.

Further, as shown in FIGS. 4, 5, and 8, the band attachment portion 2 includes a shaping portion 16 that adjusts the overall shape of the band attachment portion 2 when the reinforcing portion 15 is attached to the exterior main body 10. There is. The shaping portions 16 are provided on the side and top sides of the cylindrical reinforcing portion 15, respectively. That is, the portion of the shaping portion 16 corresponding to the side surface side of the reinforcing portion 15 has a structure in which the first fiber-reinforced resin sheets 13 are stacked vertically, similar to the exterior main body 10.

In addition, as shown in FIGS. 4, 5, and 8, the portion of the shaping portion 16 corresponding to the upper surface side of the reinforcing portion 15 has a portion from the exterior body 10 side to the center of the upper surface that is reinforced with the first fibers of the exterior body 10. It has a structure in which resin sheets 13 are stacked vertically, and the part on the outside of the exterior main body 10 from the center of the top surface is diagonally oriented in the tangential direction to the cylindrical outer periphery of the reinforcing part 15. It has an inclined and laminated structure. Thereby, the band attaching part 2 is configured to be formed by the reinforcing part 15 and the shaping part 16.

In this case, the reinforcing part 15 and the shaping part 16 of the band attachment part 2 are fixed to the 12 o'clock side and 6 o'clock side of the exterior main body 10 by welding, as shown in FIGS. 4, 5, and 8. has been done. That is, the first fiber-reinforced resin sheet 13 of the exterior main body 10 and the shaping part 16 is a sheet made of synthetic resin with fibers arranged, and the second fiber-reinforced resin sheet 14 of the reinforcement part 15 is made of carbon fiber. It is a sheet made of synthetic resin and hardened with an array of

Therefore, the reinforcing part 15 and the shaping part 16 of the band attachment part 2 are formed by combining the first fiber-reinforced resin sheet 13 and the second fiber-reinforced resin sheet 14, as shown in FIGS. 4, 5, and 8. They are configured to be firmly fixed by heating and melting the resin, and in this state, welding them to each other by thermocompression bonding.

By the way, the outer surface of each protrusion 12 on the 3 o'clock side and 9 o'clock side protruding from the outer periphery of the exterior member 6, and each of the band attachment parts 2 on the 12 o'clock side and 6 o'clock side. As shown in FIGS. 4 and 6 to 8, a protective layer 17, which is a protective member, is provided on each of the outer surfaces. This protective layer 17 is for protecting the laminated surface of the first fiber-reinforced resin sheet 13 of the exterior main body 10, and is a layer in which fibers are arranged in a direction crossing the lamination direction of the first fiber-reinforced resin sheet 13. It is formed by a third fiber reinforced resin sheet 18 which is the second fiber reinforced resin sheet.

In this case, the third fiber-reinforced resin sheet 18 may be a glass fiber-reinforced resin sheet in which glass fibers are arranged and hardened with synthetic resin, as shown in FIG. It is preferable to use a carbon fiber reinforced resin sheet hardened with carbon fiber. This third fiber-reinforced resin sheet 18 may be one in which carbon fibers are arranged in one direction intersecting the lamination direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10; It is preferable to have a mesh shape arranged in two directions intersecting with the lamination direction of the first fiber-reinforced resin sheets 13 of the main body 10.

That is, as shown in FIG. 4, the mesh-like third fiber-reinforced resin sheet 18 has carbon fibers crossed in two directions intersecting with the stacking direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10. Therefore, the rigidity and strength are higher than that in which the carbon fibers are arranged only in one direction intersecting the stacking direction of the first fiber-reinforced resin sheets 13 of the exterior main body 10. As shown in FIGS. 6 to 8, the third fiber-reinforced resin sheet 18 is fixed to the surface of the protruding portion 12 and the surface of the band attaching portion 2 by welding, respectively.

That is, as shown in FIGS. 6 to 8, the third fiber-reinforced resin sheet 18 crosses carbon fibers in two directions intersecting the stacking direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10. ) are arranged and hardened with synthetic resin. Therefore, the third fiber-reinforced resin sheet 18 and the first fiber-reinforced resin sheet 13 of the exterior body 10 are heated and melted, and in this state are welded to each other by thermocompression bonding. It is configured to be firmly fixed to the ten first fiber reinforced resin sheets 13.

Furthermore, as shown in FIGS. 6 to 8, the third fiber-reinforced resin sheet 18 of the protective layer 17 is such that the surface of the exterior main body 10 on which the first fiber-reinforced resin sheet 13 is laminated is the first fiber-reinforced resin sheet 18. By being formed on the laminated surface of the first fiber-reinforced resin sheet 13 in the exterior main body 10, it is configured to prevent the first fiber-reinforced resin sheet 13 from peeling off or being damaged when the laminated surface of the first fiber-reinforced resin sheet 13 receives an impact. There is.

Next, the case of assembling such a wristwatch case 1 will be explained.
In this case, the exterior member 6 is manufactured in advance. That is, first, the substantially ring-shaped exterior body 10 is formed by sequentially stacking the first fiber-reinforced resin sheets 13 vertically. At this time, the first fiber-reinforced resin sheets 13 are laminated with different fiber directions so as to alternately cross each other, and the respective synthetic resins of the laminated first fiber-reinforced resin sheets 13 are melted and fixed.

As a result, the first fiber-reinforced resin sheets 13 are sequentially laminated to form a substantially ring-shaped exterior main body 10. In this case, the projections 12 are formed to protrude from the 3 o'clock side and the 9 o'clock side of the exterior main body 10, respectively. That is, as shown in FIG. 7, these protrusions 12 are formed by sequentially stacking the first fiber-reinforced resin sheets 13 vertically, similar to the exterior main body 10.

In this state, the band attachment portions 2 are provided at the 12 o'clock side and the 6 o'clock side of the exterior main body 10, respectively. At this time, the reinforcing portion 15 of the band attaching portion 2 is formed in advance. In this case, the second fiber-reinforced resin sheet 14, which is a carbon fiber-reinforced resin sheet, is concentrically wound around the band attachment hole 2a of the band attachment portion 2 to form a cylindrical shape. Thereby, a cylindrical reinforcing portion 15 is formed in which the band attachment hole 2a is provided to penetrate in the direction of the cylinder axis.

In this case, when the second fiber-reinforced resin sheet 14 is wound into a cylindrical shape, the direction of the carbon fibers is in a direction intersecting or perpendicular to the axial direction of the band attachment hole 2a. That is, when the watch band (not shown) attached to the band attachment part 2 is pulled in the longitudinal direction of the second fiber-reinforced resin sheet 14, the fibers are arranged in the direction in which force is received in the tensile direction. It is formed like this. As a result, a reinforced portion 15 with high strength is formed by the second fiber-reinforced resin sheet 14.

In this case, the band attaching part 2 is formed by a reinforcing part 15 and a shaping part 16. That is, the shaping portion 16 is formed of a portion in which the first fiber-reinforced resin sheets 13 are stacked vertically, and a portion in which the first fiber-reinforced resin sheets 13 are laminated in an oblique manner. For this reason, the band attachment part 2 including the cylindrical reinforcing part 15 and the shaping part 16 formed concentrically by the second fiber-reinforced resin sheet 14 is attached to each of the 12 o'clock side and the 6 o'clock side of the exterior body 10. Attach it to the side.

In this case, the first fiber-reinforced resin sheet 13 of the exterior main body 10 and the shaping portion 16 and the second fiber-reinforced resin sheet 14 of the reinforcing portion 15 are sheets in which fibers are hardened with synthetic resin. For this reason, with the reinforcing part 15 and shaping part 16 of the band attachment part 2 arranged on the 12 o'clock side and the 6 o'clock side of the exterior main body 10, the synthetic resin of each laminated fiber reinforced resin sheet is They are heated and melted, and in this state they are welded and fixed together by thermocompression bonding.

Thereby, the reinforcing part 15 and the shaping part 16 of the band attaching part 2 are firmly fixed to the side surface of the exterior main body 10. In this case, the shaping part 16 of the band attachment part 2 is formed in advance on the side surface of the exterior main body 10, and the reinforcing part 15 of the band attachment part 2 is welded and fixed to this shaping part 16 by thermocompression bonding. It's okay.

In this state, a protective layer 17 is provided on each surface of the protruding portion 12 and the band attaching portion 2 provided protrudingly on the outer circumferential surface of the exterior main body 10. In this case, the protective layer 17 may be provided over the entire outer circumferential surface of the exterior main body 10, but it is only necessary to provide it at least on each surface of the protrusion 12 and the band attachment section 2 that protrude from the outer circumferential surface of the exterior main body 10. .

This protective layer 17 is formed of a third fiber-reinforced resin sheet 18 in which fibers are arranged in two directions intersecting the stacking direction of the first fiber-reinforced resin sheets 13 forming the exterior main body 10. In this case, the third fiber-reinforced resin sheet 18 is a carbon fiber-reinforced resin sheet in which carbon fibers are hardened with synthetic resin, and the carbon fibers are arranged so as to intersect with the stacking direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10. It is a mesh-like structure arranged in two directions.

That is, in the mesh-like third fiber-reinforced resin sheet 18, the carbon fibers are arranged in a cross manner in two directions intersecting the stacking direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10. The rigidity and strength are higher than those in which carbon fibers are arranged only in one direction intersecting the stacking direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10. Then, the protective layer 17 of the third fiber-reinforced resin sheet 18 may be fixed to at least the respective surfaces of the protruding portion 12 and the band attaching portion 2 by welding. In this case, the third fiber-reinforced resin sheet 18 may be fixed to the entire outer peripheral surface of the exterior main body 10 by welding.

Thereby, the third fiber-reinforced resin sheet 18 of the protective layer 17 is formed on the laminated surface of the first fiber-reinforced resin sheet 13, which is the surface of the exterior main body 10 on which the first fiber-reinforced resin sheet 13 is laminated. For this reason, the third fiber-reinforced resin sheet 18 of the protective layer 17 allows the first fiber-reinforced resin sheet 13 to peel off when the laminated surface on which the first fiber-reinforced resin sheet 13 of the exterior main body 10 is laminated receives an impact. This protects the laminated surface of the first fiber-reinforced resin sheet 13 of the exterior main body 10 by preventing damage.

The shape of the exterior main body 10 formed in this manner is adjusted by cutting the inner peripheral surface and the outer peripheral surface thereof. That is, this exterior main body 10 is machined except for the protruding portion 12 and the band attachment portion 2, thereby forming retaining recesses on the 3 o'clock side and the 9 o'clock side of the inner circumferential surface of the exterior main body 10. 10b is formed, and mounting recesses 11 are formed at the 1 o'clock side, 5 o'clock side, 7 o'clock side, and 11 o'clock side on the upper surface of the exterior main body 10.

At this time, the outer circumferential surface of the exterior main body 10 is cut, except for the protruding portion 12 and the band attachment portion 2, so that the laminated surface of the first fiber-reinforced resin sheet 13 appears on the outer circumferential surface. Therefore, in this exterior member 6, the lamination lines in which the first fiber reinforced resin sheets 13 are laminated on the outer peripheral surface are expressed as a horizontal striped pattern, and the striped pattern due to the laminated lines of the first fiber reinforced resin sheets 13 , the design quality is improved and the product value is increased.

Further, at this time, switch insertion holes 10a are provided at each location on the 2 o'clock side, 3 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side of the exterior main body 10 by drilling. Further, at this time, screw holes 11a are provided in each of the mounting recesses 11 at the 1 o'clock side, 5 o'clock side, 7 o'clock side, and 11 o'clock side on the upper surface of the exterior main body 10, respectively. Thereby, the exterior member 6 can be formed accurately and well.

Next, a case in which the wristwatch case 1 is assembled using such an exterior member 6 will be described.
In this case, first, the lower case 4 is inserted into the exterior member 6 from above. At this time, the engagement protrusion 4b provided on the outer periphery of the 3 o'clock side and the 9 o'clock side of the lower case 4 is inserted into the retaining recess provided on the inner periphery of the 3 o'clock side and the 9 o'clock side of the exterior member 6. 10b from above to lock the engaging protrusion 4b in the retaining recess 10b.

At this time, the plurality of switch mounting holes 4a provided at the 2 o'clock side, 3 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side of the lower case 4 are connected to the 2 o'clock side and 3 o'clock side of the exterior member 6. , are arranged corresponding to the plurality of switch insertion holes 10a provided at the 4 o'clock side, the 8 o'clock side, and the 10 o'clock side, respectively. In this state, the plurality of switch parts 3 are inserted from the outer circumferential side of the exterior member 6 into each switch mounting hole 4a of the lower case 4 through each switch insertion hole 10a of the exterior member 6 and attached.

Then, a timepiece module (not shown) is placed inside the lower case 4. In this state, the upper case 5 is placed and attached to the upper part of the lower case 4 and the exterior member 6. At this time, the watch glass 7 is fitted and attached to the upper case 5 together with the glass packing 7a in advance. Then, the waterproof ring 5a is arranged between the lower surface of the upper case 5 and the upper surface of the lower case 4, and in this state, the upper case 5 is arranged above each of the lower case 4 and the exterior member 6.

At this time, a plurality of screw mounting portions 8 provided on the 1 o'clock side, 5 o'clock side, 7 o'clock side, and 11 o'clock side of the upper case 5 are connected to the 1 o'clock side and 5 o'clock side of the upper surface of the exterior member 6. This corresponds to a plurality of mounting recesses 11 provided on each of the side surfaces, 7 o'clock side, and 11 o'clock side. Then, each disc part 8b of the plurality of screw mounting parts 8 is arranged in a plurality of mounting recesses 11, and the screw insertion hole 8c of each disc part 8b corresponds to the screw hole 11a of each mounting recess 11, respectively.

In this state, each screw part 9a of the plurality of screw members 9 is inserted into the screw insertion hole 8c of each disc part 8b along each groove part 8a of each screw attachment part 8 of the upper case 5, and each of the inserted screws The portion 9a is screwed into the screw hole 11a of the mounting recess 11. Then, the screw member 9 is tightened, and the screw head 9b is placed on the disk portion 8b of the screw attachment portion 8. Then, the screw head 9b presses the upper case 5 against the exterior member 6. Thereby, the exterior member 6 is pulled up toward the upper case 5.

At this time, since the engagement protrusion 4b of the lower case 4 is engaged with the retaining recess 10b of the exterior member 6, when the exterior member 6 is pulled up toward the upper case 5, the lower case 4 is also pulled up at the same time. . Therefore, the upper end surface of the lower case 4 is pressed against the lower end surface of the upper case 5 via the waterproof ring 5a. Thereby, the wristwatch case 1 is assembled and the wristwatch is assembled at the same time.

As described above, according to the exterior member 6 of the wristwatch case 1, the exterior body 10 has the first fiber-reinforced resin sheet 13 laminated thereon, and the exterior body 10 is provided on the laminated surface of the first fiber-reinforced resin sheet 13 of the exterior body 10. By providing the protective layer 17 which is a protective member, the strength can be increased and the impact resistance can be improved. That is, in this exterior member 6, since the protective layer 17 is provided on the laminated surface of the first fiber-reinforced resin sheet 13, the strength can be increased by the protective layer 17, and the impact resistance can be improved.

Furthermore, in the exterior member 6 of the wristwatch case 1, the protective layer 17 is the third fiber-reinforced resin sheet 18 in which fibers are arranged in a direction crossing the lamination direction of the first fiber-reinforced resin sheet 13. , the outer periphery surface of the exterior main body 10 can be easily and well protected.

That is, in the exterior member 6 of this wristwatch case 1, the third fiber-reinforced resin in which fibers are arranged in a direction intersecting the lamination direction of the first fiber-reinforced resin sheet 13 of the exterior body 10 is formed on the outer peripheral surface of the exterior body 10. Since the sheet 18 is provided, even if the laminated surface of the first fiber-reinforced resin sheet 13 of the exterior main body 10 receives an impact, the third fiber-reinforced resin sheet 18 prevents the first fiber-reinforced resin sheet 13 from peeling off or being damaged. This allows the outer periphery surface of the exterior main body 10 to be easily and well protected.

In addition, in the exterior member 6 of the wristwatch case 1, a protrusion 12 and a band attachment part 2, which are protrusions, are provided on the outer peripheral surface of the exterior main body 10, and a protective layer is formed on each surface of the protrusion 12 and the band attachment part 2. 17, the protective layer of the third fiber-reinforced resin sheet 18 can be protected even if the surfaces of the protruding portion 12 protruding from the outer peripheral surface of the exterior main body 10 and the band attachment portion 2 are susceptible to external impact. 17 can prevent the first fiber-reinforced resin sheet 13 from peeling off or being damaged on each surface of the protrusion 12 and the band attachment part 2, and thereby each surface of the protrusion 12 and the band attachment part 2 can be easily and well cleaned. can be protected.

In this case, in the exterior member 6 of the wristwatch case 1, the third fiber-reinforced resin sheet 18 is provided only on each surface of the protrusion 12 protruding from the outer periphery of the exterior main body 10 and the band attachment part 2, so that the protrusion 12 and the outer peripheral surface of the exterior main body 10 other than the band attachment part 2, the lamination surface of the first fiber-reinforced resin sheet 13 appears, and the lamination lines on this lamination surface appear as a horizontal striped pattern, and the first fiber-reinforced resin The striped pattern formed by the laminated lines of the sheet 13 can enhance the design, thereby making it possible to obtain a product with high commercial value.

In addition, in the exterior member 6 of the wristwatch case 1, the fibers of the third fiber reinforced resin sheet 18 are arranged in a crossed manner in two directions intersecting the lamination direction of the first fiber reinforced resin sheet 13 of the exterior main body 10. By doing so, the strength of the third fiber-reinforced resin sheet 18, which is arranged by crossing the fibers in two directions intersecting the stacking direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10, can be increased by can be higher than the third fiber-reinforced resin sheet 18 in which the fibers are arranged in one direction intersecting the lamination direction of the first fiber-reinforced resin sheet 13, and thereby the first fiber-reinforced resin sheet 13 of the exterior main body 10 Even if the laminated surface of the first fiber-reinforced resin sheet 13 receives an impact, peeling or damage of the first fiber-reinforced resin sheet 13 can be more reliably prevented.

That is, in the exterior member 6 of the wristwatch case 1, the fibers of the third fiber-reinforced resin sheet 18 are arranged in a cross manner in two directions, so that the fibers can be arranged in a mesh shape. The third fiber-reinforced resin sheet 18 in which the fibers are arranged in a mesh shape can reliably increase the rigidity and strength of the protective layer 17, so that the laminated surface of the first fiber-reinforced resin sheet 13 of the exterior main body 10 is protected against impact. Even if the first fiber-reinforced resin sheet 13 is subjected to such damage, the protective layer 17 of the third fiber-reinforced resin sheet 18 can more reliably prevent the first fiber-reinforced resin sheet 13 from peeling off or being damaged.

In addition, in the exterior member 6 of the wristwatch case 1, since the protective layer 17 of the third fiber-reinforced resin sheet 18 is a carbon fiber-reinforced resin sheet, this also increases the rigidity of the protective layer 17 of the third fiber-reinforced resin sheet 18. Since the strength can be increased, even if the laminated surface of the first fiber-reinforced resin sheet 13 of the exterior main body 10 receives an impact, the protective layer 17 of the third fiber-reinforced resin sheet 18 protects the first fiber-reinforced resin sheet 13. Peeling and damage can be reliably and effectively prevented.

Furthermore, in the exterior member 6 of the wristwatch case 1, the protective layer 17 of the third fiber-reinforced resin sheet 18 is welded to each surface of the protruding part 12 and the band attachment part 2, so that the third The fiber-reinforced resin sheet 18 can be easily and reliably provided on each surface of the protruding portion 12 and the band attaching portion 2.

That is, in the exterior member 6 of this wristwatch case 1, the first fiber-reinforced resin sheet 13 and the third fiber-reinforced resin sheet 18 are sheets in which fibers are hardened with synthetic resin, and when joining these, the synthetic resin is The third fiber-reinforced resin sheet 18 can be easily and reliably fixed to each surface of the projection part 12 and the band attachment part 2 by melting them together and welding and fixing them by thermocompression bonding. At the same time, it can be firmly fixed.

In the above-described embodiment, a case was described in which the third fiber-reinforced resin sheet 18 was provided on each surface of the protrusion 12 protruding from the outer circumferential surface of the exterior main body 10 and the band attachment portion 2. However, the third fiber reinforced resin sheet 18 may be provided over the entire outer circumferential surface of the exterior main body 10.

In this case, since the third fiber-reinforced resin sheet 18 is provided over the entire outer circumferential surface of the exterior main body 10, the third fiber-reinforced resin sheet 18, which is the protective layer 17, makes the first fiber-reinforced resin sheet 18 of the exterior main body 10 Even if the laminated surface of the resin sheet 13 receives an impact, peeling or damage of the first fiber-reinforced resin sheet 13 can be prevented, and thereby the outer circumferential surface of the exterior main body 10 can be reliably and well protected.

Furthermore, in the embodiment described above, the protective layer 17 has the fibers of the third fiber-reinforced resin sheet 18 arranged in a mesh pattern in two directions intersecting the lamination direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10. As described above, the present invention is not limited to this. For example, the present invention may have a structure in which the fibers of the third fiber-reinforced resin sheet 18 are arranged in one direction intersecting the lamination direction of the first fiber-reinforced resin sheet 13 of the exterior main body 10. It's okay. In this case as well, even if the laminated surface of the first fiber-reinforced resin sheet 13 of the exterior main body 10 receives an impact, the first fiber-reinforced resin sheet 13 can be prevented from peeling off or being damaged.

Further, in the embodiment described above, a case has been described in which the reinforcing portion 15 is formed into a cylindrical shape by concentrically wrapping the second fiber-reinforced resin sheet 14, but the present invention is not limited to this. The fiber-reinforced resin sheet 14 may be wound in an elliptical shape to form an elliptical cylinder shape, or the second fiber-reinforced resin sheet 14 may be wound in a polygonal shape such as a triangle, square, or pentagon to form a polygonal cylinder shape. good.

In this way, the reinforcing part 15 can be formed into an elliptical cylinder shape or a polygonal cylinder shape by wrapping the second fiber-reinforced resin sheet 14 concentrically in multiple layers. To ensure the rigidity and strength of the reinforcing part 15 of the second fiber-reinforced resin sheet 14 even when the reinforcing part 15 of the second fiber-reinforced resin sheet 14 is formed into a free shape. I can do it.

Further, in the above-described embodiment, the upper case 5 is made of a metal such as stainless steel or a hard synthetic resin, but the present invention is not limited to this. Similarly, a structure formed by laminating the first fiber-reinforced resin sheets 13 may be used.

Further, in the embodiments described above, the case where the invention is applied to a wristwatch has been described, but the present invention does not necessarily have to be a wristwatch, and can be applied to various types of timepieces such as a travel watch, an alarm clock, a desk clock, and a wall clock. . Further, the present invention does not necessarily have to be a watch, but can also be applied to electronic devices such as a mobile phone or a personal digital assistant.

Although one embodiment of this invention has been described above, this invention is not limited to this, but includes the invention described in the claims and its equivalents.
Below, the inventions described in the claims of the present application will be additionally described.

(Additional note)
The invention according to claim 1 includes: an exterior main body in which first fiber-reinforced resin sheets are laminated; and a protective member provided on a laminated surface of the first fiber-reinforced resin sheets of the exterior main body. It is an exterior member characterized by having a

The invention according to claim 2 is the exterior member according to claim 1, in which the protective member includes a second fiber reinforced resin sheet in which fibers are arranged in a direction crossing the lamination direction of the first fiber reinforced resin sheet. This is an exterior member characterized by being a fiber-reinforced resin sheet.

The invention according to claim 3 is the exterior member according to claim 1 or 2, wherein a protrusion is provided on the outer periphery of the exterior main body, and the protection member is provided on the surface of the protrusion. It is an exterior member characterized by having a

The invention according to claim 4 is the exterior member according to claim 3, wherein the protruding portion is a protrusion and a mounting protrusion that protrude from the outer periphery of the exterior main body.

The invention according to claim 5 is the exterior member according to claim 2, wherein the second fiber-reinforced resin sheet has fibers arranged in one direction.

The invention according to claim 6 is the exterior member according to claim 2, wherein the second fiber-reinforced resin sheet has fibers arranged so as to intersect in two directions. .

The invention according to claim 7 is the exterior member according to any one of claims 1 to 6, wherein the protective member is a carbon fiber reinforced resin sheet.

The invention according to claim 8 is the exterior member according to any one of claims 1 to 7, wherein the protective member is welded to the surface of a protrusion provided on the outer periphery of the exterior main body. This is an exterior member characterized by:

The invention according to claim 9 is a timepiece characterized by comprising the exterior member according to any one of claims 1 to 8.

1 Watch case 2 Band attachment part 2a Band attachment hole 3 Switch part 4 Lower case 4a Switch attachment hole 4b Engagement protrusion 5 Upper case 5a Waterproof ring 6 Exterior member 7 Watch glass 8 Screw attachment part 8a Groove part 8b Disc part 8c Screw insertion Hole 9 Screw member 9a Threaded portion 9b Screw head 10 Exterior body 10a Switch insertion hole 10b Retaining recess 11 Mounting recess 11a Screw hole 12 Projection 13 First fiber reinforced resin sheet 14 Second fiber reinforced resin sheet 15 Reinforcement portion 16 Shaping Part 17 Protective layer 18 Third fiber reinforced resin sheet

Claims (8)

an exterior main body in which a first fiber-reinforced resin sheet is laminated;
a protective member provided on the laminated surface of the first fiber-reinforced resin sheet of the exterior main body;
Equipped with
The exterior member is characterized in that the protection member is a second fiber-reinforced resin sheet in which fibers are arranged in a direction crossing the lamination direction of the first fiber-reinforced resin sheet. The exterior member according to claim 1 ,
An exterior member characterized in that a protrusion is provided on an outer periphery of the exterior main body, and the protection member is provided on a surface of the protrusion. The exterior member according to claim 2 ,
The exterior member is characterized in that the protruding portion is a protrusion and a mounting protrusion that protrude from the outer periphery of the exterior main body. In the exterior member according to any one of claims 1 to 3,
An exterior member characterized in that the second fiber-reinforced resin sheet has fibers arranged in one direction. In the exterior member according to any one of claims 1 to 4,
An exterior member characterized in that the second fiber-reinforced resin sheet has fibers arranged so as to intersect in two directions. In the exterior member according to any one of claims 1 to 5 ,
The exterior member is characterized in that the protective member is a carbon fiber reinforced resin sheet. In the exterior member according to any one of claims 1 to 6 ,
The said protection member is welded to the surface of the protrusion provided in the outer periphery of the said exterior main body. The exterior member characterized by the above-mentioned. A timepiece comprising the exterior member according to any one of claims 1 to 7 .

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