Exterior part unit and timepiece

Abstract

To suitably fix exterior parts to a timepiece case without using screw parts.SOLUTION: A bezel unit 3 comprises: a top bezel 7 which is fixed to an upper side of a timepiece case 2 having an opening 21 so as to surround the opening 21, and is made of a brittle material; and a front bezel 4 and a side bezel 5 which are disposed on a side of the timepiece case 2 and fixed to the timepiece case 2 so that their sideward movement is restricted, in which upward movement is restricted by the top bezel 7, and which are made of a brittle material.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an exterior part unit and a timepiece. [Background technology]

[0002] Patent Document 1 discloses a wristwatch equipped with a protective member for the crown. The protective member is fixed to the side of the exterior case with a bolt. If a brittle material such as sapphire were to be used for an exterior part such as this protective member, it would be prone to breakage and would be impossible to drill a bolt hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-169968 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made in view of the above circumstances, and has as its object to suitably fasten an exterior part to a watch case without using threaded fasteners such as bolts. [Means for solving the problem]

[0005] In order to achieve the above object, the exterior part unit of the present invention comprises: a first part made of a brittle material and fixed to an upper side of a watch case having an opening so as to surround the opening; a second part made of a brittle material, which is arranged on the side of the watch case and fixed to the watch case so as to restrict lateral movement, and whose upward movement is restricted by the first part; Equipped with. [Effects of the Invention]

[0006] According to the present invention, an exterior component can be suitably fixed to a watch case without using a screw fastener. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a front view of the main parts of the timepiece according to the embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the main parts of the timepiece according to the embodiment. [Figure 3] FIG. 2 is a partial cross-sectional view of the timepiece taken along line III in FIG. 1. [Figure 4] FIG. 2 is a partial cross-sectional view of the timepiece taken along line IV in FIG. 1. [Figure 5] FIG. 2 is a diagram showing the contact surfaces of the side bezel and the watch case according to the embodiment. [Figure 6] FIG. 2 is a partial cross-sectional view of the timepiece taken along line VI in FIG. 1. [Figure 7] FIG. 2 is an exploded perspective view of the rectangular bezel according to the embodiment. [Figure 8] FIG. 8 is a partial cross-sectional view of the timepiece taken along line VIII in FIG. [Figure 9] FIG. 10 is an exploded perspective view showing a modified example of the fixing structure of the square bezel. [Figure 10] 2A and 2B are cross-sectional views for explaining a modified example of the fixing structure of the rectangular bezel, where FIG. 2A is a cross-sectional view taken along line IX in FIG. 1, and FIG. 2B is a cross-sectional view taken along line X in FIG. [Figure 11] FIG. 10 is a front view of the main parts of a timepiece according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a timepiece 100 according to this embodiment is a wristwatch worn on a user's wrist. Specifically, the timepiece 100 includes a watch case 2 and a bezel unit 3. In the following description, the X, Y, and Z directions of the timepiece 100 refer to the directions shown in the respective drawings. That is, the X direction refers to the 3 o'clock-9 o'clock direction in an analog timepiece, the Y direction refers to the 12 o'clock-6 o'clock direction, and the Z direction refers to the front-to-back direction of the timepiece 100 (watch case 2). Within the Z direction, the front side, which is the visible side, is referred to as the "upper side (upper)" and the back side as the "lower side (lower)." Furthermore, the direction perpendicular to the central axis Ax of the watch case 2 along the Z direction is referred to as the "radial direction," the direction of rotation around the central axis Ax is referred to as the "circumferential direction," and within a plane perpendicular to the central axis Ax, the side closer to the central axis Ax is referred to as the "inner side (inner diameter side)," and the side further away from the central axis Ax is referred to as the "outer side (outer diameter side)."

[0009] The watch case 2 is formed into a roughly rectangular cylindrical shape when viewed from the front (top), with an opening 21 on the front side (upper side) closed by a transparent crystal member 23 that transmits visible light, and an opening on the rear side (lower side) closed by a back cover 24 (see Figure 3, etc.). The watch case 2 is made of a material such as metal, such as titanium or stainless steel, or a hard resin, such as carbon. However, the watch case 2 need only be rigid, and its material is not particularly limited as long as it is not a brittle material. A watch module 10 (see Figure 3, etc.) is housed inside the watch case 2. The watch module 10 includes, for example, a time display unit that displays the time, a battery that serves as a power source, and a circuit board on which a control circuit is mounted. Note that the shape of the watch case 2 when viewed from the top is not limited to a rectangular cylindrical shape, and may be, for example, a polygonal shape other than a rectangle, or a circle, etc.

[0010] 2 and 3, a stepped portion 25 is formed around the entire circumference of the outer surface of the watch case 2, gradually increasing in size from top to bottom toward the outer diameter side. The stepped portion 25 has a step surface 25a that faces upward and is approximately perpendicular to the Z direction. The portion of the watch case 2 above the stepped portion 25 is a cylindrical portion 26 that has a rounded rectangular cylindrical shape when viewed from above. The windshield member 23 is fitted into the opening 21 on the inner diameter side of the cylindrical portion 26 via a first packing 231.

[0011] The bezel unit 3 is an example of an exterior component unit according to the present invention and includes two front bezels 4, two side bezels 5, four corner bezels 6, a top bezel 7, and a spacer 81. The exterior components 30 of the bezel unit 3 (the front bezels 4, the side bezels 5, the corner bezel main body 61, and the top bezel 7) excluding the retaining member 62 of the corner bezel 6 (described later) and the spacer 81 (described later) are made of a translucent material that transmits visible light, such as sapphire glass. However, the material of the exterior component 30 is not limited to translucent materials and broadly includes brittle materials such as inorganic glass, ceramic, and shell. Furthermore, although not particularly limited, all surfaces of the exterior component 30 are mirror-finished to a predetermined smoothness.

[0012] Of the bezel unit 3, the two front bezels 4, two side bezels 5, and four corner bezels 6, excluding the top bezel 7, are arranged in a ring shape as a whole in a plane perpendicular to the Z direction, covering the outer surface of the watch case 2. Of these, the front bezels 4 and side bezels 5 are an example of a second part according to the present invention, and are arranged on the sides (outside) of the watch case 2 and fixed to the watch case 2 so that lateral movement is restricted. More specifically, the front bezels 4 and side bezels 5 correspond to the four sides of the approximately rectangular watch case 2 and are arranged along each of these sides. The corner bezel 6 is an example of a third part according to the present invention, and is arranged between two adjacent front bezels 4 and side bezels 5 (i.e., at the four corners of the watch case 2).

[0013] The two front bezels 4 are disposed on both sides of the watch case 2 in the Y direction. Each front bezel 4 is formed in a shape that extends in the X direction corresponding to the side of the watch case 2 in the Y direction. Each front bezel 4 is also disposed so as to cover the upper side of a band attachment portion 29 of the watch case 2 to which a band (not shown) is attached. Corresponding to the shape of the band attachment portion 29, each front bezel 4 is formed in the shape of a generally inclined plate that gradually becomes lower as it moves away from the central axis Ax in the Y direction.

[0014] The inner diameter end 41 of each front bezel 4 abuts against and is fixed to the watch case 2. Specifically, the central portion of the inner surface of the end 41, excluding both sides in the X direction, forms a planar first abutment surface 41a. The portion of the watch case 2 corresponding to the first abutment surface 41a is the planar first case side flat surface 26a on both sides in the Y direction of the outer surface of the tubular portion 26, which is approximately perpendicular to the radial direction. When each front bezel 4 is arranged around the watch case 2, the first abutment surface 41a abuts against the first case side flat surface 26a of the watch case 2. The underside of the end 41 of each front bezel 4 abuts against the step surface 25a of the watch case 2 via double-sided tape 83a. In other words, the underside of the end 41 and the step surface 25a of the watch case 2 are adhered by the double-sided tape 83a.

[0015] 2, 4, and 5, the two side bezels 5 are arranged on both sides of the watch case 2 in the X direction. Each side bezel 5 is formed in a shape that extends in the Y direction, corresponding to a side of the watch case 2 in the X direction.

[0016] The inner diameter end 51 of each side bezel 5 abuts and is fixed to the watch case 2. Specifically, the central portion of the inner surface of the end 51, excluding both sides in the Y direction, forms a flat second abutment surface 51a. The portion of the watch case 2 corresponding to the second abutment surface 51a is the flat second case side flat surface 26b on both sides in the X direction of the outer surface of the tubular portion 26, which is approximately perpendicular to the radial direction. When each side bezel 5 is arranged around the watch case 2, the second abutment surface 51a abuts the second case side flat surface 26b of the watch case 2. The underside of the end 51 of each side bezel 5 abuts the step surface 25a of the watch case 2 via double-sided tape 83d. In other words, the underside of the end 51 of each side bezel 5 and the step surface 25a of the watch case 2 are adhered by the double-sided tape 83d. The height of the end 51 of the side bezel 5 in the Z direction is approximately the same as that of the end 41 of the front bezel 4. In FIG. 5, the second contact surface 51a and the second case side flat surface 26b are shown with a dotted pattern for ease of understanding, but the surface state of these flat areas is not particularly limited.

[0017] As shown in FIGS. 2 and 6 , a U-shaped undercut groove 52 opening downward is formed in the portion of each side bezel 5 corresponding to the multiple operation buttons 9. Each operation button 9 is fixed to a portion of the watch case 2 below the cylindrical portion 26, intersecting both the X and Y directions and extending approximately along the radial direction. Each operation button 9 includes a decorative piece 91, a button pipe 92, and a push button 93. The decorative piece 91 is formed in a substantially cylindrical shape and is placed in the undercut groove 52 without direct contact with the side bezel 5, with a buffer 94 (e.g., made of nitrile rubber) sandwiched between it and the side bezel 5. The side bezel 5 is pressed radially inward by the decorative piece 91 via the buffer 94. The button pipe 92 is inserted into the decorative piece 91 and screwed to the watch case 2, with its flange projecting outward to hold the decorative piece 91 in place. An O-ring 95 seals the gap between the button pipe 92 and the watch case 2. The push button 93 is inserted into the button pipe 92 and is supported so that it can be pressed radially. If the timepiece 100 has an analog display system and is equipped with a crown, the side bezel 5 can be structured similarly to this embodiment to avoid contact with the crown.

[0018] As shown in Figures 1, 2, 7, and 8, the four bezels 6 are arranged in the corners of the watch 100 between the front bezel 4 and the side bezels 5 when viewed from above. Each bezel 6 has a bezel main body 61 and a retaining member 62 that holds it. The bezel main body 61 is formed in a generally rectangular column shape that is elongated in the Z direction. The surface of the bezel main body 61 that corresponds to the inner diameter side of the watch case 2 is formed in a stepped shape with a downward-facing step surface 61a. The retaining member 62 has a groove that opens radially outward and runs along the Z direction, and the bezel main body 61 is housed in this groove. The retaining member 62 has an upward-facing step surface 62a within the groove that corresponds to the step surface 61a of the bezel main body 61. The rectangular bezel main body 61 is bonded to the holding member 62 with an adhesive, with its step surface 61a abutting against the step surface 62a of the holding member 62 in the X direction and its inner diameter end surface 61b abutting against the groove bottom surface 62b of the holding member 62 in the radial direction. However, the method of joining the rectangular bezel main body 61 and the holding member 62 is not limited to adhesive, and double-sided tape, for example, may be used. A convex portion 621 extending in the Z direction is formed on the inner diameter surface of the holding member 62. A groove portion 28 (see FIG. 2) extending in the Z direction corresponding to the convex portion 621 is formed at each of the four corners of the watch case 2. Each rectangular bezel 6 is positioned at a corner of the watch case 2 by fitting the convex portion 621 of the holding member 62 into the groove portion 28 of the watch case 2. The top surface of the convex portion 621 of the holding member 62 and the bottom surface of the groove portion 28 of the watch case 2 are bonded with double-sided tape 83e. At this time, a downward-facing step surface 621a formed on the lower end of the protrusion 621 of the retaining member 62 abuts against an upward-facing step surface 28a in the groove 28 of the watch case 2. The retaining member 62 is interposed circumferentially between the front bezel 4 and the side bezel 5, or between the front bezel 4 or the side bezel 5 and the rectangular bezel main body 61. The material (raw material) of the retaining member 62 is, for example, a metal such as titanium or stainless steel, or a hard resin such as carbon. However, the retaining member 62 may be made of any rigid material, and its material is not particularly limited as long as it is not a brittle material.

[0019] As shown in FIGS. 2 and 3, the top bezel 7 is an example of a first component according to the present invention, and is disposed above the watch case 2. The top bezel 7 is a square annular shape in top view that corresponds to the shape of the watch case 2, and is formed in a shape with a flange 71 that protrudes inward around the entire circumference. The top bezel 7 is fitted and fixed to the watch case 2 by being press-fitted onto the outer diameter side of the cylindrical portion 26 of the watch case 2. However, the top bezel 7 only needs to be fixed to the upper side of the watch case 2 so as to surround the opening 21 of the watch case 2 (i.e., so as to surround the periphery of the crystal member 23 that fits into the opening 21). Furthermore, the manner in which the top bezel 7 is fixed to the watch case 2 is not limited to press-fitting. A second gasket 82 is disposed between the top bezel 7 and the cylindrical portion 26 to prevent direct contact between them. The second gasket 82 is made of a different material from the first gasket 231, and is softer (less rigid) than the first gasket 231. The flange 71 of the top bezel 7 is disposed above the cylindrical portion 26 and the first packing 231 so that they cannot be seen from the front side.

[0020] The top bezel 7 sandwiches and fixes the annularly arranged front bezel 4, side bezels 5, and rectangular bezels 6 between the watch case 2 and the watch case 2 in the Z direction, restricting their upward movement. Specifically, an end 41 of each front bezel 4 is fixed between the step surface 25a of the watch case 2 and the lower end surface of the top bezel 7, and an end 51 of each side bezel 5 is fixed between the step surface 25a of the watch case 2 and the lower end surface of the top bezel 7. For each rectangular bezel 6, a retaining member 62 is fixed between the step surface 28a of the watch case 2 and the lower end surface of the top bezel 7, and a rectangular bezel main body 61 is fixed between the step surface 62a of the retaining member 62 and the lower end surface of the top bezel 7.

[0021] A metal (e.g., titanium) spacer 81 is interposed between the top bezel 7 and the front bezel 4, side bezel 5, and rectangular bezel 6 (bezel main body 61) to prevent direct contact with them. The spacer 81 is formed in a square ring shape when viewed from above, corresponding to the top bezel 7, and is arranged below the top bezel 7 around the entire circumference of the watch case 2. Double-sided tape 83b is attached to the underside of the spacer 81, and this double-sided tape 83b bonds the spacer 81 to the front bezel 4, side bezel 5, and rectangular bezel 6 (bezel main body 61 and holding member 62). Double-sided tape 83c is attached to the top surface of the spacer 81, and this double-sided tape 83c bonds the spacer 81 to the top bezel 7. The material of the spacer 81 is, for example, a metal such as titanium or stainless steel, or a hard resin such as carbon. However, the material of the spacer 81 is not particularly limited as long as it is rigid and is not a brittle material.

[0022] Next, we will explain the procedure for assembling the bezel unit 3 to the watch case 2. It is assumed that the watch module 10 is already housed in the watch case 2, and that the crystal member 23 and back cover 24 are attached, and that the operation buttons 9 are also attached. It is also assumed that each of the four corner bezels 6 has already been assembled.

[0023] First, as shown in Figures 2 and 8, the four bezels 6 are attached to the four corners of the watch case 2. Specifically, the bezels 6 are positioned at each corner of the watch case 2 by fitting the convex portions 621 on the inner diameter side of the retaining members 62 of the bezels 6 into the grooves 28 at the corners of the watch case 2. Each bezel 6 is temporarily fixed by being adhered to the bottom surface of the grooves 28 of the watch case 2 with double-sided tape 83e attached to the top surface of the convex portions 621. At this time, the downward-facing step surface 621a formed on the lower end of the convex portions 621 of the retaining members 62 is brought into contact with the upward-facing step surface 28a in the grooves 28 of the watch case 2.

[0024] Next, as shown in Figures 2, 3, and 4, the two front bezels 4 and two side bezels 5 are sequentially attached to the watch case 2. Each front bezel 4 is temporarily fixed by adhering the underside of the end 41 to the step surface 25a of the watch case 2 with double-sided tape 83a, with the first abutment surface 41a of the end 41 in radial contact with the first case-side flat surface 26a of the watch case 2. Each side bezel 5 is temporarily fixed by adhering the underside of the end 51 to the step surface 25a of the watch case 2 with double-sided tape 83d, with the second abutment surface 51a of the end 51 in radial contact with the second case-side flat surface 26b of the watch case 2. At this time, the heights of the upper end surfaces of the front bezel 4, side bezel 5, and corner bezel 6 are approximately flush in a plane approximately perpendicular to the Z direction.

[0025] Next, the spacer 81 is placed on the watch case 2. With double-sided tapes 83c and 83b attached to the top and bottom surfaces, the spacer 81 is placed on the watch case 2 so that the cylindrical portion 26 is inserted through it. The spacer 81 is temporarily fixed by being adhered to the top surfaces of the front bezel 4, side bezel 5, and corner bezel 6 with the double-sided tape 83b on its bottom surface.

[0026] Next, the top bezel 7 is attached to the watch case 2. With the second packing 82 already placed on the outer diameter side of the cylindrical portion 26 of the watch case 2, the top bezel 7 is press-fitted from above onto the outer diameter side of the cylindrical portion 26 via the second packing 82. The top bezel 7 is press-fitted until it is in sufficient contact with the front bezel 4, side bezel 5, and square bezel 6 via the spacers 81. This allows the front bezel 4, side bezel 5, and square bezel 6 to be appropriately fixed in place while being sandwiched between the watch case 2 and the top bezel 7.

[0027] As described above, according to this embodiment, the top bezel 7 (first part) made of a brittle material is fixed to the upper side of the watch case 2 so as to surround the opening 21. The front bezel 4 and side bezel 5 (second parts) made of a brittle material are arranged on the sides of the watch case 2 and fixed to the watch case 2 so as to restrict lateral (inner diameter) movement, and upward movement is restricted by the top bezel 7. This makes it possible to suitably fix these exterior parts 30 to the watch case 2 without directly fixing the top bezel 7, front bezel 4, and side bezel 5 to the watch case 2 with screw fasteners. Consequently, screw holes that reduce the strength of the exterior parts 30 are no longer necessary, and the impact resistance of the watch 100 can be improved.

[0028] Furthermore, according to this embodiment, the top bezel 7 is fixed to the watch case 2 so as to surround the periphery of the crystal member 23 that closes the opening 21 of the watch case 2. This allows the top bezel 7 to cover and conceal, for example, the retaining parts around the crystal member 23 (the cylindrical part 26 and the first packing 231) so that they cannot be seen from the front side.

[0029] Furthermore, according to this embodiment, a second gasket 82 (fixing member) is placed between the inner surface of the top bezel 7 and the upper cylindrical portion 26 of the metal watch case 2. This avoids direct contact (abutment) between the top bezel 7 and the watch case 2, and prevents damage to the top bezel 7, which is made of a brittle material. Note that the fixing member interposed between the top bezel 7 and the watch case 2 (cylindrical portion 26) does not have to be a gasket, and can be, for example, an adhesive, as long as it can appropriately fix them while avoiding direct contact.

[0030] Furthermore, according to this embodiment, the second packing 82 interposed between the top bezel 7 and the watch case 2 is softer (softer) than the first packing 231 interposed between the crystal member 23 and the watch case 2. This allows the top bezel 7 to be suitably press-fitted into the outer diameter side of the watch case 2 (cylindrical portion 26) even when the crystal member 23 is previously fitted (press-fitted) into the inner diameter side of the watch case 2 (cylindrical portion 26).

[0031] Furthermore, according to this embodiment, the front bezel 4 and side bezels 5 (second components) arranged on the sides of the watch case 2 are restricted from moving sideways by double-sided tape (adhesive tape) 83a, 83d interposed between them and the step surface (step surface) 25a of the watch case 2. This allows the front bezel 4 and side bezels 5 to be more firmly fixed. Note that the member restricting the movement of this second component does not have to be the double-sided tape 83a, 83d attached to the step surface 25a. For example, a packing or adhesive may be interposed between the second component and the side surface of the watch case 2 (for example, the first case side flat surface 26a and the second case side flat surface 26b). Even in this case, the packing or adhesive can effectively restrict the movement of the second component sideways of the watch case 2.

[0032] It goes without saying that the embodiments to which the present invention can be applied are not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention. For example, in the above-described embodiment, the exterior component 30 that exteriorly covers the watch case 2 is divided into multiple parts both circumferentially and vertically around the watch case 2. However, the exterior component unit according to the present invention only needs to include a first component fixed to the top of the watch case and a second component disposed on the side of the watch case, and the manner in which they are divided is not particularly limited. For example, the second component disposed on the side of the watch case may be a single annular member.

[0033] Furthermore, in the above embodiment, the bezel 6 is directly secured to the watch case 2 only by the double-sided tape 83e. Therefore, if the adhesive strength of the double-sided tape 83e weakens and the Z-direction pressure applied by the top bezel 7 loosens, the bezel 6 may fall off toward the outer diameter (outward). Therefore, for example, the bezel 6 may be directly secured to the watch case 2. Specifically, as shown in FIGS. 9(A), (B) and 10(A), (B), the watch case 2A in this case has pocket-shaped locking recesses 28A that open upward at the four corners where the bezel 6A is located. The side wall of the locking recess 28A has a notch 281A in the circumferential center, approximately halfway up the top. The retaining member 62A of the bezel 6A has a locking protrusion 622A on its inner diameter surface that protrudes downward and corresponds to the locking recess 28A of the watch case 2A. The circumferential center of the opening of the locking protrusion 622A is a solid portion 623A that fits into the notch 281A of the locking recess 28A. As with the above embodiment, with the rectangular bezel main body 61A attached to the retaining member 62A, the locking protrusion 622A is inserted from above into the locking recess 28A of the watch case 2A and locked. During insertion, the solid portion 623A of the locking protrusion 622A is guided by the notch 281A of the locking recess 28A. Furthermore, by filling the locking recess 28A with adhesive at this time, the locking protrusion 622A and the locking recess 28A are more firmly fixed together. As a result, the rectangular bezel main body 61A is adhered to a retaining member 62A (metal member) interposed between the rectangular bezel main body 61A and the adjacent front bezel 4 and side bezel 5, and the retaining member 62A is locked to the watch case 2A, thereby restricting outward movement. Therefore, it is possible to prevent the front bezel 4, side bezel 5, and rectangular bezel main body 61A from coming into contact with each other and suppressing damage to these, while also preventing the rectangular bezel 6A from falling off the watch case 2A.

[0034] Alternatively, movement of the rectangular bezel (third component) between them may be restricted by a front bezel and a side bezel (two second components) adjacent in the circumferential direction. In this case, as shown in FIG. 11 , the front bezel 4B and the side bezel 5B located on both sides of the rectangular bezel 6B in the circumferential direction have two side surfaces 43B, 53B that face each other in the circumferential direction via the rectangular bezel 6B, which are inclined so that they approach each other as they move radially away from the central axis Ax of the watch case 2. In addition, the retaining member 62B of the rectangular bezel 6B that faces the front bezel 4B and the side bezel 5B in the circumferential direction also has both circumferential side surfaces inclined so that its width narrows as it moves radially away from the central axis Ax of the watch case 2. As a result, the outward movement of the rectangular bezel 6B is restricted by the front bezel 4B and the side bezel 5B, with the retaining member 62B (metal component) interposed between the adjacent front bezel 4B and the side bezel 5B and the rectangular bezel main body 61B. Therefore, the front bezel 4B, the side bezel 5B, and the rectangular bezel main body 61 can be prevented from coming into contact with each other, preventing damage to these components, while also preventing the rectangular bezel 6B from falling off the watch case 2.

[0035] Furthermore, the position of the contact surface of exterior part 30 against watch case 2 is not particularly limited as long as it can suitably restrict movement of said exterior part 30. For example, it may be located at an end rather than the center of exterior part 30. It is preferable that said contact surface be set so as to ensure as large an area as possible, corresponding to the division mode of exterior part 30 described above.

[0036] In addition, the lower surface of the exterior part 30 (for example, the lower surface of the top bezel 7) made of a translucent material may be coated or vapor-deposited with an opaque layer to prevent internal parts such as double-sided tape from being visible from the front side.

[0037] The present invention can also be widely applied to an exterior component unit (exterior structure) in which a first component and a second component made of a brittle material are fixed to a watch case without using screw fasteners. The materials of the exterior components other than the first component and the second component are not limited to brittle materials. The material of the watch case is also not particularly limited. [Explanation of symbols]

[0038] 2, 2A...watch case, 3...bezel unit (exterior part unit), 4, 4B...front bezel (second part), 5, 5B...side bezel (second part), 6, 6A, 6B...square bezel, 7...top bezel (first part), 10...watch module, 21...opening, 23...crystal member, 25a...step surface (step surface), 30...exterior part, 61, 61A, 61B...square bezel main body (third part), 62, 62A, 62B...holding member, 82...second packing (fixing member), 231...first packing, 100...watch

Claims

1. a first part made of a brittle material and fixed to an upper side of a watch case having an opening so as to surround the opening; a second part made of a brittle material, which is arranged on the side of the watch case and fixed to the watch case so as to restrict lateral movement, and whose upward movement is restricted by the first part; An exterior part unit comprising:

2. The first part is fixed to the watch case so as to surround the periphery of a crystal member that closes the opening of the watch case. The exterior part unit according to claim 1 .

3. The watch case is made of metal, A fixing member is disposed between the inner surface of the first part and the top of the watch case. The exterior part unit according to claim 2 .

4. a first packing interposed between the crystal member and the watch case; a second packing interposed between the first component and the watch case; The second packing has a lower hardness than the first packing. The exterior part unit according to claim 2 .

5. The second component is restricted from moving sideways relative to the watch case by a packing or adhesive interposed between the second component and the side surface of the watch case, or by an adhesive tape interposed between the second component and the stepped surface of the watch case. The exterior part unit according to claim 1 .

6. A plurality of the second components are arranged on the sides of the watch case, a third component made of a brittle material and disposed between two adjacent second components of the plurality of second components; the third component is bonded to a metal member interposed between the two adjacent second components; The metal member is engaged with the watch case to restrict outward movement. The exterior part unit according to claim 1 .

7. A plurality of the second components are arranged on the sides of the watch case, a third component made of a brittle material and disposed between two adjacent second components of the plurality of second components; The third component is restricted from moving outward by the two adjacent second components with a metal member interposed between the third component and the two adjacent second components. The exterior part unit according to claim 1 .

8. A clock module; a watch case containing the watch module and having an opening; a first part made of a brittle material fixed to the upper side of the watch case so as to surround the opening; a second part made of a brittle material, which is arranged on the side of the watch case and fixed to the watch case so as to restrict lateral movement, and whose upward movement is restricted by the first part; A watch equipped with.

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