JP6617266B2 - Watch band and manufacturing method thereof - Google Patents

Description

  The present invention relates to a wristwatch band and a manufacturing method thereof.

  A conventional wristwatch band has, for example, a center piece and two side pieces that support the center piece from both the left and right sides as a single band piece block. In addition, a through hole is formed in the center piece to connect the center piece and the side piece, and a connecting pin longer than the width of the center piece is inserted into the through hole, and the left and right ends of the connecting pin are connected to the left and right side pieces, respectively. A wristband having a fixed structure has been invented (see, for example, Patent Document 1).

  Further, a wristwatch band has been devised in which a ring member is inserted into the through hole, a connecting pin is inserted into the inner periphery of the ring member, and the connecting pin is supported or fixed by the ring member (see, for example, Patent Document 2). ).

  In the wristwatch band described in Patent Literature 1, the connecting pin is inserted into the through hole of each center piece, the shaft ends of the connecting pin are inserted into the stop holes of the side piece, and the center piece is supported from both sides by the side piece. Further, the stopper piece is fitted into the counterbore hole of the side piece, and the side piece is supported by the connecting pin. With such a wristwatch band configuration, the side piece can be securely supported by the connecting pin, and the center piece can be reliably supported from both sides by the side piece so that the wristwatch band can be assembled.

  The wristwatch band described in Patent Document 2 is an adjustment band piece in which an outer piece (side piece) and a middle piece (center piece) are combined in a Y shape, and the band is configured to be freely attached and detached. The middle piece sandwiched between the pair of left and right outer pieces is composed of a middle piece main body and side members provided on the left and right side surfaces thereof. Further, a pin hole for a connecting pin is formed in the middle piece portion protruding from the outer piece, and a C-ring pipe (ring member) for supporting the connecting pin in the pin hole is provided in the pin hole. With such a band piece configuration, it is possible to provide an adjustment band piece that can be used easily and safely without the C-ring pipe falling out of the band piece.

JP 2001-197911 A Actual climb 3149703

  However, since the structure of the conventional wristwatch band requires a structure (fixed structure) for fixing the connecting pin and the side piece, the number of parts is increased by the fixed structure, and a manufacturing process for fixing parts is also required. there were. Furthermore, an operation process for fixing the connecting pin and the side piece is also necessary. Specifically, a hole for inserting the connecting pin is formed in the side piece, or some fixing structure is required at both ends of the connecting pin. Therefore, the number of parts and the manufacturing process increased, leading to a decrease in the mass productivity of the wristwatch band and a high cost.

  Furthermore, since the fixed portion of the connecting pin appears on the exterior of the side piece, the quality and appearance of the entire wristwatch band are degraded, and the decorativeness is also degraded. In the wristwatch band of Patent Document 1, a counterbore hole is formed in the side piece, and a stopper piece is fitted into the counterbore hole to support the side piece and the connecting pin. Therefore, the fixed part of the connecting pin did not appear on the external appearance of the side piece. However, a stopper piece is separately required as a part for fixing the side piece and the connecting pin, resulting in an increase in the number of parts and the manufacturing process, a decrease in the mass productivity of the wristwatch band, and an increase in cost.

  Further, along with the use of the wristwatch, there is a possibility that the fixed part between the side piece and the connecting pin may be loosened or damaged, and the side piece and the connecting pin may fall off. If a drop between the side piece and the connection pin occurs, the end of the connection pin will not be fixed, and in a wristband that supports the left and right side pieces with a single connection pin, the connection pin may fall off the center piece due to movement of the arm. There was sex. In addition, the side piece and the center piece may be separated due to the falling of the connecting pin, and the wristwatch band may be disassembled.

  The present invention has been made in light of the above circumstances, and can reduce the number of parts and the number of manufacturing steps, thereby improving mass productivity, low cost, excellent texture and appearance decoration, and use of a wristwatch. It is an object of the present invention to provide a wristwatch band and a method for manufacturing the wristwatch band that can prevent separation of the center piece and the side piece due to.

The above-mentioned subject is achieved by the following present invention.
That is, the wristwatch band of the present invention comprises at least a center piece provided with a plurality of through holes penetrating in the horizontal direction in parallel and a side piece provided with a plurality of connecting pins inserted into the through holes. In a watch band in which a plurality of connecting pins provided on a piece are inserted into respective through holes of different adjacent center pieces, and the center piece and the side piece are assembled,
The side piece is composed of a side piece main body and side parts, and at least two connecting pins are integrally formed on one side part, and a ring member is inserted into the inside of the through hole and the side piece main body. The connecting pins of the two side parts from the left and right sides of the through hole are inserted into the through hole, the inside of the hole of the side piece body, and the inner periphery of the ring member. The center piece and the side piece are assembled as the center piece is supported from the left and right by the two side parts by facing the ends of the pins.

  In one embodiment of the wristwatch band of the present invention, the connecting pin is formed in a cylindrical shape, the center piece is composed of a center piece main body and a center piece side part, and the center piece main body penetrates in the lateral direction. A plurality of through holes are provided in parallel, the center piece side part is configured by at least two side wall parts, and each side wall part is provided with a plurality of holes, and the two side wall parts are provided on the center piece main body. The center of the through hole provided in the left and right side surfaces and the center of the through hole provided in the center piece main body and the center of the hole provided in the side wall are arranged on the same axis in the horizontal direction, and (the diameter of the hole in each side wall) < It is preferable that (the diameter of each through hole in the center piece main body) and the condition of the size relationship of (the diameter of the hole in each side wall) <(the outer diameter of the ring member) is satisfied.

  In another embodiment of the wristwatch band of the present invention, the side parts are preferably made of metallic glass.

  In another embodiment of the wristwatch band of the present invention, it is preferable that each side wall portion is connected by a connecting portion, and either or both of the side part and the center piece side portion are made of metal glass.

  In another embodiment of the wristwatch band of the present invention, it is preferable that the metal glass contains Au, Pt, Zr, Cu, Pd, or Ti as a main component.

Further, the wristwatch band manufacturing method of the present invention is provided with a plurality of through holes penetrating in the lateral direction in the center piece in parallel, and a plurality of connecting pins to be inserted into the through holes are provided in the side piece. In the method of manufacturing a wristwatch band in which a plurality of connecting pins included in each is inserted into each through hole of a different adjacent center piece, and the center piece and the side piece are assembled,
The side piece is composed of the side piece main body and the side part, and at least two connecting pins are integrally formed on one side part, and the ring member is inserted into the through hole of the center piece and inside the hole of the side piece main body. Insert the connecting pins of the two side parts from the left and right sides of the through hole into the inside of the through hole and inside the hole of the side piece body and the inner periphery of the ring member. The ends of the connecting pins are opposed to each other, the center piece is supported from the left and right by two side parts, and the center piece and the side piece are assembled.

  In one embodiment of the method for manufacturing a wristwatch band of the present invention, the connecting pin is formed into a cylindrical shape, the center piece is composed of a center piece main body and a center piece side part, and the center piece side part is composed of at least two pieces. A plurality of through-holes configured by side walls and penetrating laterally through the center piece main body, a plurality of holes provided in each side wall, and the outer diameter of the ring member are expressed as (diameter of hole in each side wall) <(center The diameter of each through hole of the piece body) and (the diameter of the hole of each side wall portion) <(outer diameter of the ring member) are set so as to satisfy the size relationship, and the through hole is formed in the center piece body. A plurality of holes are provided in parallel, a plurality of holes are provided in each side wall portion, a ring member is inserted into the through hole of the center piece main body, and two side wall portions are provided on both the left and right side surfaces of the center piece main body. The center of the through hole provided in the piece body The center of the hole provided in the side wall portion is arranged on the same axis in the lateral direction, and the connecting pins of the two side parts from the left and right of the through hole are connected to the inside of the through hole and the ring member through the hole in the side wall portion. Assemble the center piece and the side piece by supporting the center piece from the left and right with the two side parts with the end of each connecting pin facing inside the through hole and the inner circumference of the ring member Is preferred.

  In another embodiment of the method for manufacturing a wristwatch band of the present invention, the side parts are made of metallic glass, a mold having the shape of the side parts is prepared, the metallic glass is melted, and the mold is formed. It is preferable to pour molten metal glass and produce side parts by casting.

  In another embodiment of the method for manufacturing a wristwatch band of the present invention, either or both of the side part and the center piece side part are made of metal glass, and a connecting part for connecting the side wall parts is provided, and the side part or the center is provided. Prepare a mold with the shape of the piece side part, melt the metal glass, pour the molten metal glass into the mold, and produce either or both of the side part and the center piece side part by casting. In addition, it is preferable to integrally form the connecting portion on each side wall portion.

  In another embodiment of the watchband manufacturing method of the present invention, it is preferable that the main component of the metal glass is any one of Au, Pt, Zr, Cu, Pd, and Ti.

  According to the wristwatch band and the manufacturing method thereof according to the present invention, the side part main body and the connecting pin of the side parts constituting the side piece are integrally formed. This eliminates the need for a fixing structure between the side part main body and the connecting pin, so the number of parts for fixing the connecting pin is reduced, and the process of fixing the connecting pin and the side part main body is also reduced, improving mass productivity. It is possible to provide a wristwatch band capable of reducing the cost.

  Furthermore, since a fixing structure is not required between the side part main body and the connecting pin, the fixing portion between the side part main body and the connecting pin is prevented from being exposed to the appearance of the side part. Therefore, the appearance and appearance of the entire wristwatch band can be improved, and the texture and decorativeness of the wristwatch band can be improved.

  Furthermore, since the side part body and the connecting pin are integrally molded, it is possible to eliminate the dropping of the connecting pin from the side part, and it is possible to always maintain the state where the connecting pin is fixed to the side part. . Therefore, the drop of the connecting pin from the center piece is eliminated, and the side piece and the center piece can be prevented from being separated.

  Furthermore, a conventional wristwatch that supports the left and right side pieces with a single connecting pin by using a plurality of connecting pins integrally formed on the left and right side parts main body and forming a watch band that supports the center piece from both the left and right sides. With respect to the band, the number of connecting pins inserted into one through hole of the center piece can be doubled (two connecting pins on the left and right). Therefore, with the use of the watch, even if the connecting pin on either the left or right side part falls out of the through hole of the center piece, the connecting pin on the other side part supports the center piece. It becomes possible to prevent the center piece from being disassembled.

It is a top view which shows the wristwatch band of 1st Embodiment which concerns on this invention. It is a disassembled perspective view which shows the component of the wristwatch band of 1st Embodiment which concerns on this invention, and an assembly structure. (a) It is a top view which shows the side parts which comprise the wristwatch band of 1st Embodiment which concerns on this invention. (b) It is a perspective view of the side part shown to the figure (a). (a) It is a top view which shows the side piece main body which comprises the wristwatch band of 1st Embodiment which concerns on this invention. (b) It is a front view which shows the side piece main body shown to the figure (a). (c) It is a perspective view of the side piece main body shown to the figure (a). (a) It is a top view which shows the center piece which comprises the wristwatch band of 1st Embodiment which concerns on this invention. (b) It is a front view which shows the center piece shown to the figure (a). (c) is a perspective view of the center piece shown in FIG. It is a perspective view which shows C ring pipe which comprises the wristwatch band of 1st Embodiment which concerns on this invention. It is sectional drawing of the wristwatch band of 1st Embodiment which concerns on this invention. It is a top view which shows the wristwatch band of 2nd Embodiment which concerns on this invention. (a) It is a disassembled perspective view which shows the component of a center piece which comprises the wristwatch band of 2nd Embodiment which concerns on this invention, and an assembly structure. (b) It is a perspective view which shows the center piece formed by assembling the component of the figure (a). (a) It is a top view which shows the center piece main body which comprises the wristwatch band of 2nd Embodiment which concerns on this invention. (b) It is a top view which shows the center piece side part which comprises the wristwatch band of 2nd Embodiment which concerns on this invention. It is a disassembled perspective view which shows the component of the wristwatch band of 2nd Embodiment which concerns on this invention, and an assembly structure. It is sectional drawing of the wristwatch band of 2nd Embodiment which concerns on this invention. It is a fragmentary sectional view of the wristwatch band of a 3rd embodiment concerning the present invention. It is a top view which shows the side parts which comprise the wristwatch band of the example of a change which concerns on this invention. It is a fragmentary sectional view of the wristwatch band of the example of change concerning the present invention. It is a fragmentary sectional view of the wristwatch band of other modifications concerning the present invention. It is a top view which shows the side parts which comprise the wristwatch band of the other modified example which concerns on this invention. It is a fragmentary sectional view of the wristwatch band of the further another modification concerning the present invention. It is sectional drawing for description which shows typically the step which engages a decoration member in the surface of a side part main body. It is sectional drawing for description which shows typically the other step which fits a decoration member in the surface of a side part main body. It is a perspective view which shows the side part which formed the uneven | corrugated shape of stripe form on the surface of the side surface of a side part main body.

  Hereinafter, a wristband according to a first embodiment of the present invention will be described in detail with reference to FIGS. In the wristwatch band 1 of the first embodiment, a single band piece block 2 includes one center piece 3 and two pieces that support the center piece 3 from the left and right sides as shown in FIGS. It consists of two side pieces 4 and 4.

  As shown in FIG. 5, one center piece 3 is provided with a plurality of (two in FIG. 5) through-holes 3a and 3a penetrating in the horizontal direction in parallel. On the other hand, the two side pieces 4, 4 are formed as a pair on the left and right, and each side piece 4 is composed of a side piece main body 4a and a side part 4b. Furthermore, each side part 4b is provided with a plurality of connecting pins (two in FIG. 3) 4b1 and 4b2. The side piece body 4a has holes 4a1 and 4a2 corresponding to the number of connecting pins 4b1 and 4b2. By inserting the connecting pins 4b1 and 4b2 into the holes 4a1 and 4a2, the side piece body 4a and the side parts are inserted. 4b is assembled and the side piece 4 is formed.

  Furthermore, the two connecting pins 4b1 and 4b2 provided in one side part 4b are inserted into the through holes 3a and 3a of the adjacent adjacent center pieces 3 and 3 so that the center piece 3 and the side piece 4 are Assembled.

  As shown in FIG. 3, each side part 4b is composed of one side part body 4b3 and two connecting pins 4b1 and 4b2, and one side part body 4b3 and two connecting pins 4b1 and 4b2. Is made by integral molding. Accordingly, the two connecting pins 4b1 and 4b2 are integrally formed on one side part 4b.

  The side shape of the side part main body 4b3 is formed in a substantially rounded rectangular shape (substantially oval shape) having a gentle curve and a straight line in part. The two connecting pins 4b1 and 4b2 are formed in parallel and are set in a cylindrical shape having the same diameter and the same length as each other, and their ends are chamfered. Further, the side part body 4b3 is formed with a curved bulge in a convex shape in the axial direction of the connecting pins 4b1 and 4b2. By setting the shape of the two connecting pins 4b1 and 4b2 to a cylindrical shape, the structure of the connecting pins 4b1 and 4b2 can be simplified. Accordingly, the manufacture of the side part 4b is facilitated, and the mass productivity of the wristwatch band 1 can be improved and the cost can be reduced.

  The width W4b3 of the side part body 4b3 is set to 2.0 mm to 3.0 mm, and the length T4b3 is set to 7.0 mm to 8.0 mm. The length L of the connecting pins 4b1 and 4b2 is set to 5.0 mm to 6.0 mm, and the diameter φ is set to 0.5 mm to 1.5 mm.

  As shown in FIG. 4, each side piece main body 4a, 4a is formed with a recess 4a3 for housing at least a part of the side part main body 4b3 and two holes 4a1, 4a2. The side surface shape of the side piece main body 4a is formed in a substantially rounded rectangular shape (substantially oval shape) having a gentle curve in part. Further, as shown in FIG. 4B, the front shape is formed in a trapezoidal shape having a shorter side toward the opening side of the recess 4a3.

  The side surface shape of the recess 4a3 is set to be similar to the side surface shape of the side part body 4b3, and is made slightly larger than the dimension of the side part body 4b3 in the planar direction. Further, two circular holes 4a1 and 4a2 are provided in parallel and parallel to each other so as to penetrate from the bottom surface of the recess 4a3 to the other surface, which is slightly larger than the diameter of the two connecting pins 4b1 and 4b2. It is set large. In addition, it is desirable that the two holes 4a1 and 4a2 are formed to have the same diameter from the viewpoint of ensuring ease of manufacture.

  The length T4a of the side piece body 4a is set to 9.0 mm to 10.0 mm, and the width W4a is set to around 5.0 mm. The width W4a3 of the recess 4a3 is set to around 1.5 mm. Note that the length T4a3 of the recess 4a3 may be set slightly larger than the length T4b3 of the side part body 4b3.

  The side piece main bodies 4a, 4a and the side parts 4b, 4b arranged on both sides of the center piece 3 are formed so as to be paired symmetrically on the left and right. The side part 4b is made of a material such as cemented carbide, ceramics, precious metal, gold-containing alloy, stainless steel, or metallic glass, and the side piece body 4a is composed of cemented carbide, ceramics, or sapphire unit. Made of crystals.

  Examples of cemented carbide include tungsten carbide (WC), tantalum carbide (TaC), titanium carbide (TiC), and niobium carbide (NbC). Ceramics include zirconia ceramics, alumina ceramics, and titanium nitride. And ceramics.

  In particular, when the side piece main body 4a is made of WC, TiC, NbC, or zirconia ceramic among the above materials, it is possible to impart black, blue, and pink colors to the side piece main body 4a. In addition, white can be imparted by making the side piece body 4a with WC, TiC, NbC, alumina ceramics, zirconia ceramics, titanium nitride ceramics, and pearl by making the side piece body 4a with zirconia ceramics. It is also possible to give a white color. Alternatively, a gold color can be imparted by producing the side piece body 4a from titanium nitride ceramics. By selecting the material in this way, it is possible to arbitrarily give various colors to the side piece main body 4a occupying a large volume in appearance in the side piece 4.

  Examples of the noble metal include gold and platinum, and examples of the alloy containing gold include K18 (18 gold), K22 (22 gold), and K24 (24 gold).

  When the side part 4b is made of a metallic glass, the metallic glass is a metallic glass including a vitreous metallic single phase, a vitreous metallic single having a supercooled liquid temperature range of 30K or more at a heating rate of 0.67 K / s. It is selected from any one of a metallic glass containing a phase, a metallic glass containing a crystal having a particle size of 100 nm or less, or a metallic glass containing a vitreous metallic structure containing 50% or more by volume.

  A metallic glass including a glassy metallic single phase or a crystal having a particle size of 100 nm or less has a texture structure exhibiting surface smoothness. Accordingly, since there is no particle defect, the side part 4b having a smooth surface can be produced. Furthermore, manufacturing variations can be more reliably removed. Therefore, the side part 4b having a highly accurate shape can be realized.

  When the crystal grain size exceeds 100 nm, the surface roughness (surface smoothness) of the side part 4b is adversely affected. Therefore, it is desirable that the grain size of the crystals mixed in the matrix of the metallic glass structure is 100 nm or less.

  In addition, a metal glass including a vitreous metal single phase having a supercooling temperature region of 30 K or higher at a heating rate of 0.67 K / s has high stability as a solid glass. Therefore, it is possible to manufacture each side part 4b very easily with high accuracy by using low-cost and highly reproducible molding processes such as injection molding by viscous flow, and more reliably eliminate manufacturing variations. I can do it.

  Moreover, high dimensional accuracy and high durability can be obtained by manufacturing the side part 4b with a metal glass containing a glassy metal structure at a volume ratio of 50% or more. Accordingly, each side part 4b can be manufactured with high accuracy, and high durability can be imparted to the side part 4b.

  If the volume ratio of the vitreous metal structure is less than 50%, the smoothness of the surface of the side part 4b cannot be obtained sufficiently. Therefore, the volume ratio of the vitreous metal structure in the metal glass is preferably 50% or more.

  By producing the side piece main body 4a and the side parts 4b with such various materials, a wristwatch band which is not easily damaged can be produced.

When making side parts 4b with metallic glass, metallic glass containing Au, Pt, Zr, Cu, Pd, or Ti as the main component from the viewpoint of improving the texture of the wristband and improving the decorativeness of the appearance. Is more preferable. As an example, Pt 48.75, Pd 9.75, Cu 19.5, P 22 (Pt _48.75 Pd _9.75 Cu _19.5 P ₂₂ alloy) can be cited as the composition (at%) of Pt-based metallic glass.

  After producing the side piece main body 4a and the side part 4b with the various materials described above, the surfaces of the side piece main body 4a and the side part 4b are ground and polished to give mirror finish. By mirror finishing, the surface roughness of each surface is finished to Ra = 0.1μm or less and Rz = 0.4μm or less, the luster as a decorative member is drawn out, and even higher quality and aesthetic satisfaction can be obtained as a wristwatch. . When the material of the side piece main body 4a and the side part 4b is a super hard material such as cemented carbide or ceramics, it is assumed that mirror processing is performed by grinding and polishing with a diamond wheel. In addition, when producing the side part 4b with the above-mentioned metal glass, a desired surface roughness (Ra = 0.1 μm or less and Rz = 0.4 μm or less) can be achieved by the surface smoothness peculiar to the metal glass. In particular, the surface of the side part 4b need not be mirror-finished.

  The side surface shape of the center piece 3 is formed in a substantially rounded rectangular shape (substantially oval shape) having a gentle curve in part. Further, as shown in FIG. 5 (b), the upper surface is formed in a curved shape that becomes convex as it goes to the center of the center piece 3. Further, two through holes 3a and 3a are formed.

  The length T3 of the center piece 3 is set to 9.0 mm to 10.0 mm as shown in FIG. 5A, and the width W3 is set to 9.0 mm to 10.0 mm. The two through holes 3a and 3a are preferably formed in a circular shape and have the same diameter as the holes 4a1 and 4a2, from the viewpoint of ensuring ease of manufacture.

  The center piece 3 is also made of the cemented carbide, the ceramic, or the sapphire single crystal in the same manner as the side piece main body 4a, and can arbitrarily give various colors depending on the selection of the material. Regarding the color combination of the center piece 3 and the side piece main body 4a, any combination may be used in view of the design of the wristwatch band 1, and the center piece 3 and the side piece main body 4a are made of the same material and are the same. The colors may be unified, or different colors may be set using different materials.

  By producing the center piece 3 with such various materials, a wristwatch band which is not easily damaged can be produced.

  After producing the center piece 3 with the various materials described above, the surface of the center piece 3 is also subjected to grinding and polishing to perform a mirror finish, thereby giving the surface a gloss. By mirror finishing, the surface roughness of the surface of the center piece 3 is finished to Ra = 0.1 μm or less and Rz = 0.4 μm or less similarly to the side piece main body 4a and the side part 4b.

  When the side part 4b, the side piece main body 4a, and the center piece 3 are made of cemented carbide, at least by using powder metallurgy press molding, the through hole 3a, the holes 4a1, 4a2, and the connecting pin 4b1 , Sintered material with dimensions of 4b2 near the completed shape can be obtained. After this processed material is obtained, it is only necessary to provide decorative surface polishing and chamfering parts, etc., and it is easy to apply grinding and polishing with a diamond wheel to each surface without using electric discharge machining at all. Can be shaped and mirrored. Further, the side part 4b, the side piece main body 4a, and the center piece 3 may be made of cemented carbide by powder injection molding.

  Even when the side part 4b, the side piece main body 4a, and the center piece 3 are produced using ceramics, they can be easily produced by performing powder injection molding.

  On the other hand, when the side part 4b is made of an alloy containing noble metal or gold, it is made by cutting or injection molding. Further, when the side part 4b is made of stainless steel, the side part 4b having a desired shape and size may be made by cutting the stainless steel material.

  When the side part 4b is made of metal glass, the side part 4b having a predetermined shape may be formed by die casting or injection molding. When the side part 4b is formed by die casting or injection molding, first, a mold in which the shapes of the connecting pins 4b1 and 4b2 and the side part body 4b3 described above are formed is prepared. Further, any of the metallic glasses is melted, and the molten metallic glass is poured into the mold and cooled. In this way, the side part 4b having a predetermined shape and size is produced. In the present invention, the injection molding is regarded as a kind of casting, and the injection molding is defined as including a manufacturing method using molten metal glass.

  Furthermore, the temperature of the molten metal glass is set to be equal to or higher than the melting point. In addition, the melting method of metallic glass is not specifically limited. On the other hand, the temperature of the molten metal glass is set to the melting point or higher even in the injection molding.

  As described above, according to die casting or injection molding with metallic glass, the side part 4b having a predetermined shape can be produced by a single molding, providing a low-cost and highly productive watch band. It becomes possible to do.

  Furthermore, since the side part 4b can be manufactured with good reproducibility by casting, the side part 4b can be manufactured with high quality.

  In order to suppress volume shrinkage from the time of melting of the metallic glass, it is preferable to cool and solidify at a cooling rate of 300 ° C./second or more during molding. A more preferable cooling rate is 104 ° C./second or more. However, if the cooling rate at the time of molding exceeds 107 ° C./second, the molten metal glass starts to solidify before it is sufficiently filled in the mold, so that filling failure tends to occur. As a result, the surface roughness and dimensional accuracy are significantly reduced. For this reason, the cooling rate during molding is preferably set to 300 ° C./second or more (more preferably 104 ° C./second or more) and 107 ° C./second or less.

  Further, when the side piece main body 4a and the center piece 3 are manufactured using a sapphire single crystal, the sapphire single crystal material is ground and polished to obtain a desired shape and size of the side piece main body 4a and the center piece 3. Can be produced.

  Further, the structure of the wristwatch band 1 will be described in detail. As shown in FIG. 7, a C-ring pipe 5 is inserted into the through holes 3a and 3a of the center piece 3 and the holes 4a1 and 4a2 of the side piece main body 4a. The C-ring pipe 5 is a ring member for supporting the connecting pin 4b1 or 4b2, and is made of a stainless steel cylindrical pipe material, and a part of the circumference is cut in the axial direction to be cut. The cross section is formed in an alphabetic C shape and has elastic properties. The outer diameter of the C-ring pipe 5 is set slightly smaller than the diameters of the through holes 3a and 3a and the holes 4a1 and 4a2, and one inner diameter is set slightly larger than the diameter φ of the connecting pins 4b1 and 4b2. .

  The assembly structure of the center piece 3, the side piece main bodies 4a and 4a, the side parts 4b and 4b, and the C ring pipes 5 and 5 and the assembly method as a manufacturing method will be described in detail with reference to FIGS. To do.

  First, the C ring pipes 5 and 5 are inserted into the through holes 3a and 3a one by one. Next, the left and right ends of the C ring pipes 5 and 5 are inserted into the holes 4a1 and 4a2 of the two side piece main bodies 4a. Further, the connecting pins 4b1 and 4b2 of the two side parts 4b and 4b are inserted into the inner diameters of the left and right ends of the C ring pipes 5 and 5 symmetrically from the left and right sides. The side piece main bodies 4a, 4a and the side parts 4b, 4b are assembled together by elastically supporting the 4b, 4b.

  Further, by inserting the connecting pins 4b1 and 4b2 into the central part in the axial direction of the C-ring pipes 5 and 5, until the opposing surfaces of the side parts main bodies 4b3 and 4b3 come into contact with the bottom surfaces of the recesses 4a3 and 4a3, In dimension setting, as shown in FIG. 7, the end portions of the connecting pins 4 b 1 and 4 b 2 reach the inside of the through holes 3 a and 3 a of the center piece 3. Accordingly, the connecting pins 4b1 and 4b2 are inserted into the through holes 3a and 3a from the left and right sides of the through holes 3a and 3a, and the end portions of the connecting pins 4b1 and 4b2 are arranged to face each other inside the through holes 3a and 3a. The center piece 3 is supported from the left and right sides by the two side parts 4b and 4b. By using the C-ring pipe 5 that is simple in structure and easy to manufacture for the ring member, the structure of the ring member can be simplified, and the mass productivity of the wristwatch 1 can be improved and the cost can be reduced.

  Further, the two connecting pins 4b1 and 4b2 formed on one side part 4b are inserted into the through holes 3a and 3a of the adjacent center pieces 3 and 3, respectively, and the side parts 4b and 4b and the center piece 3 are inserted. Are assembled, the single band piece block 2 is connected, and the wristwatch band 1 is configured.

  Note that the lateral direction described as the direction in which the through holes 3a and 3a and the holes 4a1 and 4a2 are formed is an extension direction of the wristwatch band 1 (that is, the center piece 3 and the side piece 4 as shown in FIG. 7). 4 is a direction perpendicular to the direction in which the wristband 1 is formed.

  As described above, according to the wristwatch band 1 and the manufacturing method thereof according to the first embodiment, the side part main body 4b3 and the connecting pins 4b1 and 4b2 of the side parts 4b and 4b constituting the side piece 4 are integrally formed. Therefore, a fixing structure is not required between the side part main body 4b3 and the connecting pins 4b1 and 4b2, so that the number of parts for fixing the connecting pins 4b1 and 4b2 is reduced, and the step of fixing the connecting pin and the side part main body 4b3 is performed. Is also reduced. Therefore, it is possible to provide the wristwatch band 1 capable of reducing the cost and improving the mass productivity.

  Furthermore, since a fixing structure is not required between the side part body 4b3 and the connecting pins 4b1, 4b2, the fixing part between the side part body 4b3 and the connecting pins 4b1, 4b2 may be exposed to the exterior of the side part 4b. Is prevented. Therefore, the appearance and appearance of the entire wristband 1 can be improved, and the texture and decoration of the wristband 1 can be improved.

  Furthermore, since the side part body 4b3 and the connecting pins 4b1 and 4b2 are integrally formed, it is possible to eliminate the dropping of the connecting pins 4b1 and 4b2 from the side part 4b, and the connecting pins 4b1 and 4b2 are always connected to the side parts 4b. It is possible to hold the state fixed to Accordingly, the connecting pins 4b1 and 4b2 from the center piece 3 are eliminated, and the side piece 4 and the center piece 3 can be prevented from being separated.

  Furthermore, by using a plurality of connecting pins 4b1 and 4b2 integrally formed on the left and right side part main bodies 4b3 as a watch band 1 that supports the center piece 3 from both the left and right sides, the left and right side pieces can be obtained with a single connecting pin. The number of connecting pins to be inserted into one through hole of the center piece can be doubled (the connecting pins 4b1 and 4b2 on the left and right respectively) with respect to the conventional wristwatch band that supports Therefore, even if the connecting pins 4b1 and 4b2 of the left and right side parts 4b and 4b drop off from the through hole 3a of the center piece 3 with the use of the wristwatch, the connecting pins 4b1 and 4b2 of the other side part 4b Since the center piece 3 is supported, the side piece 4 and the center piece 3 can be further prevented from being disassembled.

  In the present embodiment, the C ring pipe 5 is used as a ring member that supports the connecting pin 4b1 or 4b2. By using the C-ring pipe 5 that can be produced by simply cutting a part of the circumference of the cylindrical pipe material in the axial direction, it becomes possible to simplify the structure of the ring member. Therefore, it is possible to improve the mass productivity and reduce the cost.

  Furthermore, among the components of the wristwatch band 1, all the components except the ring member (center piece 3, side piece main bodies 4a, 4a, side parts 4b, 4b) are made of metal glass, cemented carbide, respectively, as described above. By manufacturing by injection molding with any material of ceramics, precious metals, and alloys including gold, batch manufacturing by injection molding becomes possible. Therefore, it is possible to improve the mass productivity of the wristwatch band 1 and reduce the cost.

  Next, with reference to FIGS. 8-12, the wristwatch band 6 of 2nd Embodiment which concerns on this invention is demonstrated in detail. In addition, the same number is attached | subjected to the same location as the wristwatch band 1 of the said 1st Embodiment, and the overlapping description is abbreviate | omitted or simplified and described.

  The watch band 6 of the second embodiment is different from the watch band 1 in that the center piece 7 is composed of one center piece main body 7a and one center piece side part 7b as shown in FIG. Is a point. As shown in FIG. 9, the center piece side part 7b is composed of two side wall parts 7b1 and 7b1 and a connecting part 7b2 for connecting the side wall parts 7b1 and 7b1. One connecting portion 7b2 and two side wall portions 7b1 and 7b1 are produced by integral molding. The two side wall portions 7b1 and 7b1 are formed so as to be symmetrical with each other on the left and right.

  The side surface shape of each of the side wall portions 7b1 and 7b1 is set to be the same as the side surface shape of the center piece main body 7a. The side shapes of the center piece main body 7a and the side wall portions 7b1 and 7b1 are set to be the same as the side shape of the center piece 3, and as shown in FIG. (Substantially oval).

  Further, two holes 7c and 7c are provided in each of the side wall portions 7b1 and 7b1. One center piece body 7a is also provided with a plurality of (two in FIG. 9) through-holes 7a1 and 7a2 penetrating in the horizontal direction in parallel. The through holes 7a1 and 7a2 and the holes 7c and 7c are provided at the same position with the same circle and the same diameter. The same position means that when the center piece main body 7a and the center piece side part 7b are assembled, the center of each of the through holes 7a1 and 7a2 and the center of each of the two holes 7c and 7c are in the lateral direction of the wristband 6. In the same axis. The diameters of the through holes 7a1 and 7a2 and the holes 7c and 7c are set to the same diameter as the through holes 3a and 3a, and are set to dimensions that allow the C-ring pipe 5 and the connecting pins 4b1 and 4b2 to be inserted. .

  The width W7b of the side wall portions 7b1 and 7b1 is set to 0.5 mm to 2.0 mm as shown in FIG. 10, and the length T7b is set to be the same as the length T7a of the center piece main body 7a. The length T7a of the center piece main body 7a is set to be the same as the length T3 of the center piece 3. The width W7a of the center piece main body 7a is reduced by the total width (2 × W7b) of the two side wall portions 7b1 and 7b1. That is, the total thickness of the width W7a of the center piece main body 7a and the total width (2 × W7b) of the two side wall portions 7b1 and 7b1 is set to be the same as the width W3 of the center piece 3.

  As shown in FIG. 9 (a), the connecting portion 7b2 has an arcuate shape with a half-moon shaped cross section along one substantially straight portion of the two side wall portions 7b1 and 7b1 and in the vicinity of the center of the two holes 7c and 7c. Formed with. In addition, a half-moon-shaped bow-shaped notch is provided in one substantially straight line portion of the center piece main body 7a so as to correspond to the cross-sectional shape of the connecting portion 7b2.

The center piece side portion 7b is made of a material such as cemented carbide, ceramics, noble metal, an alloy including gold, stainless steel, or metallic glass, similarly to the side part 4b. When the center piece side portion 7b is made of metal glass, it is made of Au, Pt, Zr, Cu, Pd, or Ti as the main component from the viewpoint of improving the texture of the wristwatch band and improving the appearance. Is more preferable. As an example, Pt 48.75, Pd 9.75, Cu 19.5, P 22 (Pt _48.75 Pd _9.75 Cu _19.5 P ₂₂ alloy) can be cited as the composition (at%) of Pt-based metallic glass. The center piece side part 7b and the side part 4b may be made of the same material and unified to the same color, or different materials may be set to different colors.

  As with the center piece 3 or the side piece body 4a, the center piece body 7a is made of the cemented carbide, the ceramic, or the sapphire single crystal, and can be given various colors depending on the selection of materials. It becomes. Regarding the color combinations of the center piece main body 7a and the side piece main body 4a, any combination may be used in view of the design of the wristwatch band 6, and the center piece main body 7a and the side piece main body 4a are made of the same material. The same color may be unified, or different colors may be set using different materials.

  After producing the center piece main body 7a and the center piece side part 7b with the various materials described above, each surface is ground and polished to give a mirror finish and give a gloss. The surface roughness of each surface is finished to Ra = 0.1 μm or less and Rz = 0.4 μm or less by mirror finishing. When the center piece side portion 7b is made of the above-described metal glass, a desired surface roughness (Ra = 0.1 μm or less and Rz = 0.4 μm or less) can be achieved by the surface smoothness unique to the metal glass. Therefore, it is not particularly necessary to mirror the surface of the center piece side part 7b.

  When the center piece side portion 7b and the center piece main body 7a are made of a cemented carbide, at least powder metallurgy press molding is applied, and then an external planar polishing and chamfered portion are provided. Alternatively, it may be made of a cemented carbide by powder injection molding.

  Moreover, even when manufacturing with ceramics, powder injection molding may be applied. In addition, when producing with an alloy including noble metal or gold, it may be produced by cutting or injection molding. When producing with stainless steel, the stainless steel material is cut to obtain a center of a desired shape and size. What is necessary is just to produce the piece side part 7b.

  When the center piece side portion 7b is made of metal glass, the center piece side portion 7b having a predetermined shape may be formed by die casting or injection molding. When the center piece side portion 7b is formed by die casting or injection molding, first, a mold in which the shapes of the side wall portions 7b1 and 7b1 and the connecting portion 7b2 are formed is prepared. Further, any of the metallic glasses is melted, and the molten metallic glass is poured into the mold and cooled. In this way, the center piece side portion 7b having a predetermined shape and size is produced.

  Similarly to the production of the side part 4b, the temperature of the molten metal glass is set to be equal to or higher than the melting point. On the other hand, the temperature of the molten metal glass is set to the melting point or higher even in the injection molding.

  Furthermore, either or both of the side part 4b and the center piece side part 7b are made of metal glass by applying die casting or injection molding, so that the side part 4b or / and the center piece side part 7b can be made once. Since it can be produced by molding, it is possible to provide a wristwatch band 6 that is low in cost and excellent in mass productivity. Further, by die casting or injection molding, the metal glass side parts 4b or the center piece side part 7b can be manufactured in one batch, and the mass production and cost reduction of the wristwatch band 6 can be achieved.

  Further, since the center piece side portion 7b can be manufactured with good reproducibility by casting, the center piece side portion 7b can be manufactured with high quality.

  Further, when the center piece body 7a is manufactured using a sapphire single crystal, the sapphire single crystal material may be prepared by grinding and polishing.

  The assembly structure and manufacturing method of the center piece main body 7a, the center piece side part 7b, the side piece main bodies 4a and 4a, the side parts 4b and 4b, and the C ring pipes 5 and 5 are shown in FIG. 11 and FIG. 12 will be described in detail.

  As shown in FIG. 9, the connecting portion 7b2 is first fitted into the arcuate cutout formed in the center piece body 7a. Then, the center piece main body 7a is fitted into the space between the two side surface portions 7b1 and 7b1, thereby assembling the center piece 7 composed of the center piece main body 7a and the center piece side portion 7b. Accordingly, the two side wall portions 7b1 and 7b1 are respectively provided on the left and right side surfaces of the center piece main body 7a. The centers of the through holes 7a1 and 7a2 and the centers of the two holes 7c and 7c are arranged on the same axis in the lateral direction of the wristwatch band 6.

  Next, the C ring pipes 5 and 5 are inserted into the holes 7c and 7c one by one, and the C ring pipes 5 and 5 are inserted into the through holes 7a1 and 7a2 one by one. Next, the left and right ends of the C ring pipes 5 and 5 are inserted into the holes 4a1 and 4a2 of the two side piece main bodies 4a. Further, the connecting pins 4b1 and 4b2 of the two side parts 4b and 4b are inserted into the inner diameters of the left and right ends of the C ring pipes 5 and 5 symmetrically from the left and right sides. The side piece main bodies 4a, 4a and the side parts 4b, 4b are assembled together by elastically supporting the 4b, 4b.

  Further, by inserting the connecting pins 4b1 and 4b2 into the central part in the axial direction of the C-ring pipes 5 and 5, until the opposing surfaces of the side parts main bodies 4b3 and 4b3 come into contact with the bottom surfaces of the recesses 4a3 and 4a3, In dimension setting, as shown in FIG. 12, the end portions of the connecting pins 4b1 and 4b2 reach the insides of the through holes 7a1 and 7a2 of the center piece main body 7a. Therefore, the connecting pins 4b1, 4b2 are inserted into the through holes 7a1, 7a2 from the left and right sides of the through holes 7a1, 7a2, and the connecting pins 4b1, 4b2 are arranged to face each other inside the through holes 7a1, 7a2. The center piece 7 is supported from the left and right sides by the side parts 4b and 4b.

  Further, the two connecting pins 4b1 and 4b2 formed on one side part 4b are inserted into the through holes 7a1 and 7a2 of the adjacent center pieces 7 and 7, respectively, so that the side parts 4b and 4b and the center piece 7 are inserted. Are assembled, the single band piece block 8 is connected, and the wristwatch band 6 is formed.

  As described above, according to the wristwatch band 6 and the manufacturing method thereof according to the second embodiment, in addition to the effect of the wristwatch band 1, the state in which the connecting pins 4b1 and 4b2 are always fixed to the side part 4b is maintained. I can do it. Accordingly, the connection pins 4b1 and 4b2 from the center piece 7 are eliminated, and the side piece 4 and the center piece 7 can be prevented from being separated.

  Furthermore, by using a plurality of connecting pins 4b1 and 4b2 integrally formed on the left and right side part main bodies 4b3 to form a wristwatch band 6 that supports the center piece 7 from both the left and right sides, the left and right side pieces can be obtained with a single connecting pin. The number of connecting pins to be inserted into one through hole of the center piece can be doubled (the connecting pins 4b1 and 4b2 on the left and right respectively) with respect to the conventional wristwatch band that supports Therefore, even if the connecting pins 4b1 and 4b2 of the left and right side parts 4b and 4b drop out of the through holes 7a1 and 7a2 and the holes 7c and 7c of the center piece 7 with the use of the wristwatch, the other side part 4b , 4b connecting pins 4b1 and 4b2 support the center piece 7, so that the side piece 4 and the center piece 7 can be further prevented from being disassembled.

  Further, all the components of the wristband 6 except the ring member (the center piece main body 7a, the center piece side portion 7b, the side piece main bodies 4a and 4a, and the side parts 4b and 4b) are respectively configured as described above. By manufacturing by injection molding with any material of metallic glass, cemented carbide, ceramics, noble metal, and alloy including gold, batch manufacturing by injection molding becomes possible. Therefore, it is possible to improve the mass productivity of the wristband 6 and reduce the cost.

  Further, since the wristwatch band 6 has the center piece side portion 7b, the side wall portion 7b1 can be exposed to the outside on both the left and right sides of the center piece 7 when the watchband 6 is assembled as shown in FIG. Become. Therefore, it is possible to arbitrarily give various colors to the side wall part 7b1 by selecting the material, or to give the metallic glass luster mainly of any of Au, Pt, Zr, Cu, Pd, and Ti. Thus, it is possible to further improve the texture and decorativeness of the wristwatch band 1.

  Next, with reference to FIG. 13, the wristwatch band 9 according to the third embodiment of the present invention will be described in detail. In addition, the same number is attached | subjected to the same location as the wristwatch band 6 of the said 2nd Embodiment, and the overlapping description is abbreviate | omitted or simplified and described.

  The watch band 9 of the third embodiment is different from the watch band 6 in that, as shown in FIG. 13, the diameters of the through holes 7a1, 7a2 of the center piece body 7a are the holes 7c, 7c of the side wall portions 7b1, 7b1. Through-holes 7a1, 7a2 so as to satisfy the condition of the size relationship that the outer diameter of the ring member (C-ring pipe 5) is larger than the diameters of the holes 7c, 7c of the side wall portions 7b1, 7b1. , The outer diameter of the ring member, and the diameters of the holes 7c and 7c of the side wall portions 7b1 and 7b1 are set. That is, in the wristwatch band 9, (the diameters of the holes 7c and 7c of the side wall portions 7b1 and 7b1) <(the diameter of the through holes 7a1 and 7a2 of the center piece main body 7a) and (the holes 7c and 7c of the side wall portions 7b1 and 7b1). The diameter) <(the outer diameter of the ring member (C-ring pipe 5)).

  The assembly structure of the wristwatch band 9 and the assembly method as a manufacturing method will be described in detail with reference to FIG. First, the ring member (C ring pipe 5) is inserted into each of the through holes 7a1 and 7a2 of the center piece main body 7a.

  Next, the center piece main body 7a and the center piece side part 7b are assembled in the same manner as the wristwatch band 6 to form the center piece 7. When the center piece 7 is formed, the center of each of the through holes 7a1 and 7a2 and the center of each of the two holes 7c and 7c are arranged on the same axis in the lateral direction of the wristwatch band 9. To do.

  On the other hand, the connecting pins 4b1 and 4b2 of the side parts 4b and 4b are press-fitted into the holes 4a1 and 4a2 of the side piece body 4a until the opposing surfaces of the side parts body 4b3 and 4b3 come into contact with the bottom surfaces of the recesses 4a3 and 4a3. By pressing the connecting pins 4b1 and 4b2, the side piece main bodies 4a and 4a and the side parts 4b and 4b are assembled together. The diameters of the holes 4a1 and 4a2 of the side piece main body 4a and the diameter φ of the connecting pins 4b1 and 4b2 are appropriately set so that they can be press-fitted together.

  Next, the connecting pieces 4b1, 4b2 of the side piece bodies 4a, 4a and the side parts 4b, 4b assembled integrally are inserted into the holes 7c, 7c of the side wall portions 7b1, 7b1 from the left and right sides, and the side wall portions 7b1, 7b1 The connecting pins 4b1 and 4b2 are inserted into the central portions in the axial direction of the C ring pipes 5 and 5 through the holes 7c and 7c, and the side parts 4b and 4b are elastically supported by the C ring pipes 5 and 5.

  In dimension setting, as shown in FIG. 13, the ends of the connecting pins 4b1 and 4b2 reach the insides of the through holes 7a1 and 7a2 of the center piece main body 7a. Therefore, in addition to the effect of the wristband 6, the wristband 9 has a ring member whose outer diameter is set to be larger than the diameters of the holes 7 c and 7 c of the side wall portions 7 b 1 and 7 b 1. It also has the effect of becoming. Therefore, the wristband 9 can be assembled more easily, and the mass production of the wristband 9 can be improved and the cost can be reduced.

  Further, according to the method of manufacturing the wristwatch band 9, the ring member does not protrude from the center piece 7 even if the left or right side parts 4b, 4b are inserted into the hole 7c from one side. Assembling is further facilitated, and the mass production of the wristwatch band 9 can be improved and the cost can be reduced.

  Further, the two connecting pins 4b1 and 4b2 formed on one side part 4b are inserted into the through holes 7a1 and 7a2 of the adjacent adjacent center pieces 7 and 7, respectively, and the side pieces 4 and 4 and the center piece 7 are inserted. Are assembled, the single band piece block 8 is connected, and the wristwatch band 9 is formed.

  Each of the above embodiments can be variously changed based on the technical idea. For example, as shown in FIG. 13, a stepped portion is provided on the outer periphery of the connecting pins 4b1, 4b2, as shown in the drawing, or a plurality of steps, The connecting pins 4b1 and 4b2 may be formed so that the diameters are different in stages. By providing the stepped portion on the outer periphery of the connecting pins 4b1 and 4b2, it becomes possible to lock the end of the C-ring pipe 5 at the stepped portion as shown in FIG. Accordingly, when the connecting pins 4b1 and 4b2 of the side parts 4b and 4b are inserted into the through holes 7a1 and 7a2 from both the left and right sides, it is possible to prevent a deviation in the arrangement position of the C ring pipe 5 inside the through holes 7a1 and 7a2. . Accordingly, the connecting pins 4b1 and 4b2 of the left and right side parts 4b and 4b can be supported by the C-ring pipe 5 with a uniform elastic force. Therefore, it is possible to prevent the left and right side parts from falling off from the center piece when the wristwatch is used, and to prevent the side piece and the center piece from being disassembled.

  Further, as shown in FIG. 16, the side piece main body 4a may be eliminated, and the side piece 11 may be formed only by the side parts 11b. In such a configuration of the wristwatch band 10, as shown in FIG. 17, the side surface shape and length T11b3 of the side part body 11b3 may be set so as to conform to the side surface shape and length T4a of the side piece body 4a. The width W11b3 may be set so as to conform to the width of the side piece 4 when the side part body 4b3 is stored in the recess 4a3. By eliminating the side piece main body 4a, the number of parts of the wristwatch band 10 is reduced, so that mass productivity can be improved and costs can be reduced. Note that the length L of the connecting pins 4b1 and 4b2 is shortened by the width of the width W11b3.

  Further, a convex portion or a concave portion is formed on at least a part of the outer periphery of the connecting pins 4b1 and 4b2, and the convex portions of the connecting pins 4b1 and 4b2 are formed on at least a part of the inner peripheral surface of the cylindrical pipe material that is a ring member. You may form the recessed part or convex part which fits corresponding to a part or a recessed part. As an example, in FIG. 18, a triangular groove-like recess 14 is provided on the outer periphery of the connecting pins 4b1 and 4b2 along the circumferential direction, and the inner periphery of the pipe member 12 that is a ring member corresponds to the recess in the circumferential direction. A cross-sectional view of a wristwatch band 13 provided with a triangular convex portion 15 having the shape described above is shown. In the wristwatch band 13, when the connecting pins 4b1 and 4b2 are inserted into the inner periphery of the pipe material 12, the convex portion 15 is fitted into the concave portion 14, and the left and right side parts 4b and 4b are securely supported by the pipe material 12. Is done. Accordingly, the drop of the connecting pin from the center piece 7 is eliminated, and the side piece 4 and the center piece 7 can be prevented from being separated.

  Further, a decorative member may be inserted into the side parts 4b and 11b made of metal glass or the side wall part 7b1 of the center piece side part 7b. The term “insertion” means a state in which a part of the decorative member is exposed and fixed on the surface of a component made of metal glass, and includes insertion or embedding. Examples of the decorative member include gemstones such as sapphire and ruby, noble metals or alloys of noble metals, ceramics, crystalline metals, enamels, and the like, but they can be arbitrarily used.

  Examples of the insertion method include a thermoforming (hot pressing) method and a hot curing method. FIG. 19 simply shows a step of fitting the decorative member into, for example, the surface of the side part main body 4b3. First, as shown in FIG. 19A, the side part 4b is produced. On the surface of the side part 4b, a recess for fitting the decorative member is provided in advance by casting or the like. Thereafter, as shown in FIG. 19 (b), the decorative member 16 is disposed on the concave portion and is disposed in the hot press apparatus.

Next, the side part 4b made of metal glass is heated in a hot press apparatus to reduce the viscosity of the side part 4b. The heating temperature is set between the crystallization temperature Tx of the metallic glass forming the side part 4b and the glass transition temperature Tg (that is, the supercooled liquid temperature range). Metallic glass is an amorphous alloy that has a stable supercooled liquid temperature range and exhibits a complete Newtonian viscous flow in this supercooled liquid temperature range, and the viscosity rapidly decreases in the supercooled liquid temperature range. The glass transition temperature differs depending on the type of metal glass. For example, a Pt-based Pt _48.75 Pd _9.75 Cu _19.5 P ₂₂ alloy has a glass transition temperature Tg = 502.3K, a crystallization temperature Tx = 587.7K, and a supercooled liquid temperature range ΔTx = 85.4K.

  Along with the reduction of the viscosity of the metallic glass, pressure is applied to the decorative member 16 disposed on the concave portion, and the decorative member 16 is buried in the concave portion as shown in FIG. Next, as shown in FIG. 19 (d), the decorative member 16 is completely embedded in the concave portion and rapidly cooled to maintain the amorphous state of the metallic glass. After the fitting operation, as shown in FIG. 19 (e), for example, polishing is performed as a finishing process for removing the excess decorative member 16.

  Alternatively, as shown in FIG. 20, the decorative member 16 may be pressed onto the surface of the metallic glass part. In this case, a part made of metal glass (side part body 4b3 in FIG. 20) is heated and heated to a temperature within the supercooled liquid temperature range. First, as shown in FIG. 20 (a), the decorative member 16 is placed on the surface of the side part body 4b3, and then heated and pressed in a hot press as shown in FIG. 20 (b). In the example of FIG. 20, pressure is applied locally only to the decorative member 16 to be fitted. The pressure is applied until the decorative member 16 is partially covered with the side part body 4b3 as shown in FIG. 20 (c). Thereafter, the metal glass is cooled, and polishing is performed to remove excess metal glass material as shown in FIG. 20 (d).

  As described above, the decorative member 16 is inserted into the side parts 4b and 11b made of metal glass or the side wall part 7b1 of the center piece side part 7b, thereby further improving the appearance and appearance of the entire wristwatch band. Further, it is possible to further improve the texture and decoration of the wristwatch band.

  Note that a concave portion or a convex portion for fixing the decorative member 16 may be formed on the side portion of the concave portion into which the decorative member 16 is inserted.

  Also, when the decorative member 16 is inserted into the recess by hot curing, the metallic glass is locally heated to a temperature within the supercooled liquid temperature range. The decorative member may be pushed into the recess at least when the recess reaches the temperature.

  In addition, on the surface of the side parts 4b, 11b or the center piece side part 7b made of metal glass, an arbitrary pattern, pattern, figure, pattern, character, three-dimensional shape is formed, and the entire wristwatch band The appearance of the texture and appearance may be improved, and the texture and decoration of the wristwatch band may be improved. As an example, FIG. 21 shows a side part 4b in which a striped uneven shape is formed on the side surface of the side part body 4b3. Such a side part 4b may be produced by casting or the like. Further, the formation of these patterns and the insertion of the decorative member 16 may be simultaneously performed on one side part 4b.

  As for patterns, patterns, figures, patterns and characters, patterns, patterns, figures, patterns and characters may be processed to be embossed, and vice versa. May be processed.

  The characters include all characters such as alphabets, hiragana, katakana, kanji, numbers, kanji, symbols, symbols, and brand logos. The graphic also includes a basic graphic such as a circle, triangle, or quadrangle, a more complicated geometric pattern, a mark indicating a brand, trademark, or manufacturer.

1, 6, 9, 10, 13 Watch band 2, 8 Band piece block 3, 7 Center piece
3a Through hole 4, 11 Side piece
4a Side piece body
4a1, 4a2 Side piece hole
4a3 Concave part of the side piece body
4b1, 11b side parts
4b1, 4b2 connecting pin
4b3, 11b3 Side part body 5 C ring pipe
7a Center piece body
7a1, 7a2 Through hole
7b Center piece side
7b1 Side wall
7b2 connecting part
7c Side wall hole
12 Pipe material
14 Recess of connecting pin
15 Convex part of pipe material
16 Decorative materials

Claims (10)

A plurality of through-holes penetrating in the lateral direction are provided at least from a center piece provided in parallel and a side piece provided with a plurality of connecting pins inserted into the through-hole, and a plurality of connecting pins provided in one side piece are provided. In the wristwatch band that is inserted into each through hole of each adjacent center piece, and the center piece and the side piece are assembled,
The side piece is composed of a side piece main body and side parts, and at least two connecting pins are integrally formed on one side part, and a ring member is inserted into the inside of the through hole and the side piece main body. The connecting pins of the two side parts from the left and right sides of the through hole are inserted into the through hole, inside the hole of the side piece body, and inside the ring member, and connected to each other inside the through hole and inside the ring member. A wristwatch band in which the center piece and the side piece are assembled by supporting the center piece from the left and right by the two side parts by facing the ends of the pins.   The connecting pin is formed in a cylindrical shape, and the center piece is composed of a center piece body and a center piece side part, and the center piece body is provided with a plurality of through holes penetrating in the lateral direction in parallel. The center piece side portion is composed of at least two side wall portions, and each side wall portion is provided with a plurality of holes, and the two side wall portions are respectively provided on the left and right side surfaces of the center piece main body. The center of the through hole provided in the piece main body and the center of the hole provided in the side wall portion are arranged on the same axis in the lateral direction, and (the diameter of the hole in each side wall portion) <(each through hole in the center piece main body) 2. The wristwatch band according to claim 1, wherein a size relationship of (the diameter of the hole in each side wall portion) <(the outer diameter of the ring member) is satisfied.   The wristwatch band according to claim 1, wherein the side part is made of metal glass.   The wristwatch band according to claim 2, wherein each of the side wall portions is connected by a connecting portion, and either or both of the side part and the center piece side portion are made of metal glass.   The wristwatch band according to claim 3 or 4, wherein the metallic glass contains Au, Pt, Zr, Cu, Pd, or Ti as a main component. The center piece is provided with a plurality of through-holes penetrating in the horizontal direction in parallel, and a plurality of connecting pins to be inserted into the through-holes are provided on the side piece, and a plurality of connecting pins provided on one side piece are adjacent to each other. In the manufacturing method of the wristwatch band that is inserted into each through hole of the center piece and assembles the center piece and the side piece,
The side piece is composed of the side piece main body and the side parts, and at least two connecting pins are integrally formed on one side part, and the ring member is inserted into the through hole of the center piece and inside the hole of the side piece main body. Insert the connecting pins of the two side parts from the left and right sides of the through hole into the inside of the through hole, the inside of the hole of the side piece body, and the inner periphery of the ring member. A method of manufacturing a wristwatch band, comprising assembling a center piece and a side piece, with the ends of the connecting pins facing each other, supporting the center piece from the left and right by two side parts. The connecting pin is formed into a cylindrical shape, and the center piece is composed of a center piece main body and a center piece side part, and the center piece side part is constituted by at least two side walls, and the center piece main body is laterally arranged. A plurality of through-holes penetrating through, a plurality of holes provided in each side wall portion, and an outer diameter of the ring member is (a diameter of each side wall portion hole) <(a diameter of each through hole of the center piece main body). And (diameter of hole in each side wall) <(outer diameter of said ring member) is set so as to satisfy the size relationship, and a plurality of through holes are provided in parallel in the center piece body, and each side wall portion A plurality of holes are provided in the center piece body, the ring member is inserted into the through hole of the center piece main body, and two side walls are provided on both the left and right side surfaces of the center piece main body. And the center of the hole in the side wall The connecting pins of each of the two side parts are inserted into the through hole and the inner periphery of the ring member from the left and right of the through hole through the hole in the side wall, arranged on the same axis in the lateral direction. The center piece and the side piece are assembled by supporting the center piece from the left and right by the two side parts with the end portions of the connection pins facing each other inside the through hole and the inner periphery of the ring member. The method for manufacturing a wristwatch band according to claim 6. The side parts are made of metal glass, a mold having the shape of the side parts is prepared, the metal glass is melted, the molten metal glass is poured into the mold, and the side parts are cast by casting. The method for manufacturing a wristwatch band according to claim 6, wherein the watchband is manufactured. Either or both of the side parts and the center piece side part are made of metal glass, and a connecting part for connecting the side wall parts is provided, and the shape of the side part or the center piece side part is formed. Prepare the mold, melt the metal glass, pour the molten metal glass into the mold, produce either or both of the side part and the center piece side part by casting, and connect the above side wall part to the above The method for manufacturing a wristwatch band according to claim 7, wherein the portion is integrally formed. The watchband manufacturing method according to claim 8 or 9, wherein a main component of the metallic glass is any one of Au, Pt, Zr, Cu, Pd, and Ti.

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