Pins for watch parts, watch bands and watches

Abstract

To provide a pin for a timepiece component capable of improving resistance to external force, a band for a timepiece and a timepiece.SOLUTION: A pin is a pin for connecting timepiece components and includes a columnar trunk part, and a fitting part formed at an end part of the trunk part, and a backbone structure protruding toward a central part side in the axial direction of the trunk is formed in the fitting part over the whole periphery.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a pin for a watch component, a watch band, and a watch. [Background technology]

[0002] There is known a wristwatch band in which an inner link and an outer link are connected by a pin. In such a band, the inner link and the outer link are connected by inserting the pin into a through hole formed in the inner link and fitting both ends of the pin into insertion holes formed in the outer link. Conventionally, in order to make it easier to insert the pin into the insertion hole of the outer link, the end of the pin is processed into a knurled shape having multiple grooves extending in the longitudinal direction.

[0003] Furthermore, Patent Document 1 describes providing the end of the pin with a notch extending in the longitudinal direction, instead of processing the end of the pin into a knurled shape. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Registered Utility Model No. 3058276 Summary of the Invention [Problem to be solved by the invention]

[0005] When a pin having a groove or notch formed in the longitudinal direction is used as described above, a gap is created between the inner circumference of the insertion hole of the outer link and the outer circumference of the pin at the position of the groove or notch, reducing the contact area between the pin and the outer link. Therefore, when an external force is applied to the pin, such as rotating the pin or pulling it out of the outer link, the pin may become loose or come off.

[0006] The present invention has been made to solve the above-mentioned problems, and has an object to provide a pin for a watch component, a watch band, and a watch that can improve resistance to external forces. [Means for solving the problem]

[0007] The pin of the present invention is a pin for connecting watch parts, and is characterized in that it has a cylindrical body and a fitting portion formed at the end of the body, and that the fitting portion is formed with a barb structure around its entire circumference that protrudes toward the center in the axial direction of the body.

[0008] In the pin according to the present invention, the length of the fitting portion in the axial direction is preferably not less than one time and not more than two times the outer diameter of the body portion.

[0009] In the pin according to the present invention, it is preferable that the fitting portion is formed with three to five barb structures.

[0010] In addition, in the pin of the present invention, it is preferable that the barb structure is formed by a tapered surface whose outer diameter decreases as it moves away from the body portion, and a connecting surface connecting the tapered surfaces, and that the angle of the connecting surface with respect to the axial direction is equal to or greater than 85 degrees and equal to or less than 95 degrees.

[0011] In addition, in the pin of the present invention, it is preferable that the barb structure is formed by a tapered surface whose outer diameter decreases with increasing distance from the body portion and a connecting surface connecting the tapered surfaces, and that the gradient of the tapered surface with respect to the axial direction is greater than or equal to 5 degrees and less than or equal to 15 degrees.

[0012] In the pin according to the present invention, the body portion and the fitting portion preferably have a circular cross-sectional shape.

[0013] The band of the present invention is a band for a watch, and is characterized in that it has a pin of the present invention, an inner link having a through hole through which the body of the pin is inserted, and an outer link having an insertion hole into which the fitting portion of the pin is inserted and which fits with the pin, and the fitting portion and a part of the body are inserted into the insertion hole.

[0014] In the band according to the present invention, the depth of the insertion hole is preferably equal to or less than the sum of the axial length of the fitting portion and the outer diameter of the body portion.

[0015] A watch according to the present invention is characterized by having a band according to the present invention. Effect of the Invention

[0016] The pin for a watch component, the watch band, and the watch according to the present invention make it possible to improve resistance to external forces. [Brief description of the drawings]

[0017] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] 4 is a cross-sectional view of the pin 4 in a state where it is fitted into the outer piece 32. FIG. [Diagram 5] 4 is a cross-sectional view of the pin 4 in a state where it is fitted into the outer piece 32. FIG. [Figure 6] 2 is a cross-sectional view of the crown 21. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, various embodiments of the present invention will be described with reference to the drawings. It should be noted that the technical scope of the present invention is not limited to these embodiments, but covers the inventions described in the claims and their equivalents.

[0019] FIG. 1 is a perspective view of a watch 1 according to an embodiment. The watch 1 has a watch body 2, a pair of bands 3, and the like. The watch body 2 is a mechanical watch, a quartz analog watch, a digital watch, or the like, that has a time display function. A crown 21 for adjusting the time is disposed on the side of the watch body 2. The pair of bands 3 are connected to one end (the 12 o'clock side) and the other end (the 6 o'clock side) of the watch body 2, respectively, and are connected to each other by a clasp (not shown). The band 3 has a number of inner links 31 arranged along the extension direction of the band 3, and a number of outer links 32 arranged on both sides of the inner links 31 along the extension direction. The inner links 31 and the outer links 32 are formed of a metal such as stainless steel or titanium. The crown 21, the inner links 31, and the outer links 32 are examples of watch parts.

[0020] 2 is an exploded perspective view of the band 3. A circular first through hole 311a, a second through hole 311b, and a third through hole 311c (hereinafter, sometimes collectively referred to as through holes 311) are formed in this order between a pair of side surfaces of the inner link 31 facing the outer link 32. A circular first insertion hole 321a, a second insertion hole 321b, and a third insertion hole 321c (hereinafter, sometimes collectively referred to as insertion holes 321) are formed in this order on the side surface of the outer link 32 facing the inner link 31.

[0021] The outer link 32 is arranged such that the first insertion hole 321a, the second insertion hole 321b, and the third insertion hole 321c face the third through hole 311c, the first through hole 311a, and the second through hole 311b of any of the inner links 31. As a result, the inner link 31 and the outer link 32 are arranged in a staggered manner in the extension direction of the band 3.

[0022] The inner link 31 and the outer link 32 are connected by a pin 4. The pin 4 is made of a metal, such as stainless steel or titanium, having a hardness similar to or greater than that of the outer link 32, and has a cylindrical body 41 and fitting portions 42 formed at both ends of the body 41. The inner diameter of each through hole 311 of the inner link 31 is made larger than the outer diameter of the body of the pin 4. The body 41 of the pin 4 is inserted into each through hole 311 of the inner link 31 so that the fitting portions 42 of the pin 4 protrude from both ends.

[0023] Each insertion hole 321 of the outer link 32 is formed so that its inner diameter is smaller than the outer diameter of the body 41 of the pin 4 and the outer diameter of the fitting portion 42, whichever is greater. The fitting portions 42 of the pin 4 protruding from both ends of the inner link 31 are press-fitted into each insertion hole 321 of the outer link 32, and the pin 4 fits into the insertion hole 321. This joins the inner link 31 and the outer link 32.

[0024] Since a gap exists between the inner peripheral surface of the through hole 311 of the inner link 31 and the outer peripheral surface of the body 41 of the pin 4, the inner link 31 is rotatable with respect to the pin 4. Therefore, the inner link 31 is rotatable with respect to the outer link 32 with the pin 4 inserted through the third through hole 311c as the rotation axis. This makes the band 3 bendable.

[0025] Fig. 3 is a plan view of the pin 4, and Figs. 4 and 5 are cross-sectional views of the pin 4 in a state where it is fitted into the outer block 32. Fig. 4 is a cross-sectional view taken along the line IV-IV in Fig. 3, and Fig. 5 is a cross-sectional view taken along the line VV in Fig. 3. In Fig. 5, the inner peripheral surface of the insertion hole 321 is shown by a dotted line.

[0026] The fitting portion 42 has a shape in which a plurality of truncated cones are stacked so as to be coaxial with the axis R of the body portion 41. That is, the fitting portion 42 is formed with a barb structure 421 that protrudes toward the body portion 41. Also, as shown in FIG. 5, the inner diameter of the insertion hole 321 is larger than the minimum value of the outer diameter of the fitting portion 42 (i.e., the diameter of the upper base surface of the truncated cone) and smaller than the maximum value (i.e., the diameter of the lower base surface of the truncated cone). As a result, when the fitting portion 42 is press-fitted into the insertion hole 321, the barb structure 421 bites into the inner peripheral surface of the insertion hole 321, and the fitting portion 42 and the insertion hole 321 are fitted together.

[0027] The fitting portion 42 is symmetrical about the axis R, and the barb structure 421 is formed over the entire outer circumferential surface of the fitting portion 42. This provides the pin 4 with high resistance to an external force that rotates it about its axis, as well as high corrosion resistance.

[0028] That is, as shown in FIG. 5, the barb structure 421 is formed over the entire circumference of the fitting portion 42, so that the barb structure 421 is evenly engaged over the entire circumference of the inner circumferential surface of the insertion hole 321. Since the barb structure 421 protruding toward the body portion 41 side is held over the entire circumference by the inner circumferential surface of the insertion hole 321, the pin 4 has particularly high resistance to an external force in a direction to pull the pin 4 out of the insertion hole 321. In addition, since a strong frictional force is generated between the fitting portion 42 and the insertion hole 321, the pin 4 also has high resistance to an external force in a direction to rotate the pin 4 around the axis. In addition, since the barb structure 421 contacts the inner circumferential surface of the insertion hole 321 over the entire circumference, the inside of the insertion hole 321 is sealed, reducing the risk of corrosion due to the intrusion of liquid or the like.

[0029] In the example shown in Fig. 3 and Fig. 4, three barb structures 421 are formed in the fitting portion 42. It is preferable that a plurality of barb structures 421 are formed in the fitting portion 42, and more preferably, three to five barb structures 421 are formed. By forming three or more barb structures 421 in the fitting portion 42, the barb structures 421 bite into the inner circumferential surface and are respectively held in the insertion hole 321, so that the pin 4 has higher resistance to external forces. In addition, by having five or less barb structures 421, the thickness of each barb structure 421 in the axial direction is prevented from becoming thin, and the barb structures 421 are less likely to deform, so that the pin 4 has higher resistance to external forces.

[0030] The barb structure 421 is formed by a tapered surface 422 having a gradient such that the outer diameter decreases with increasing distance from the body 41, and a connecting surface 423 connecting the multiple tapered surfaces 422. Since the fitting portion 42 has the tapered surface 422, the pin 4 has high resistance to external forces. That is, when the fitting portion 42 is press-fitted into the insertion hole 321, the tapered surface 422 comes into contact with the inner peripheral surface of the insertion hole 321 and functions as a guide that aligns the axis of the fitting portion 42 with the center of the insertion hole 321. Since the axis of the fitting portion 42 and the center of the insertion hole 321 are aligned, the fitting portion 42 is easily fitted evenly around the entire circumference of the inner peripheral surface of the insertion hole 321, and the pin 4 has high resistance to external forces in all directions.

[0031] The tapered surface 422 corresponds to the side surface of a truncated cone, and is therefore axially symmetrical with respect to the axis R. This allows the pin 4 to have a higher resistance to external forces. That is, if the fitting portion of the pin has a shape that is not axially symmetrical, such as a knurled shape, when the fitting portion is pressed into the insertion hole 321, the contact area between the fitting portion and the inner peripheral surface of the insertion hole 321 becomes smaller. In this case, a strong force is locally applied to the contact portion between the fitting portion and the insertion hole 321, and the insertion hole 321 may be significantly deformed. When such deformation occurs in the insertion hole 321, the fitting portion cannot be evenly fitted with the inner peripheral surface of the insertion hole 321 over the entire circumference, and the resistance of the pin to external forces decreases. In the pin 4 according to the embodiment, since the tapered surface 422 is axially symmetrical, the contact area between the fitting portion 42 and the inner peripheral surface of the insertion hole 321 when the fitting portion 42 is pressed into the insertion hole 321 becomes larger, and deformation of the insertion hole 321 is minimized. This allows the pin 4 to be evenly fitted over the entire circumference with the inner circumferential surface of the insertion hole 321, providing higher resistance to external forces.

[0032] The gradient G1 of the tapered surface 422 with respect to the axial direction (the extension direction of the axis R) is preferably 5 degrees or more and 15 degrees or less, and more preferably 10 degrees. This allows the pin 4 to be properly inserted into the insertion hole 321 and has higher resistance to external forces. That is, when the gradient G1 is 5 degrees or more, the frictional force between the fitting portion 42 and the inner peripheral surface of the insertion hole 321 during press-fitting is reduced, so that the fitting portion 42 is properly inserted deep into the insertion hole 321. Also, when the gradient G1 is 15 degrees or less, the tapered surface 422 and the inner peripheral surface of the insertion hole 321 come into contact with each other at an early stage after the fitting portion 42 enters the inside of the insertion hole 321 during press-fitting, so that the tapered surface 422 can easily function as a guide. This allows the fitting portion 42 to be properly inserted into the insertion hole 321 with its axis coinciding with the axis of the insertion hole 321.

[0033] The angle G2 of the connection surface 423 forming the barb structure 421 with respect to the axial direction is preferably 85 degrees or more and 95 degrees or less, and more preferably 90 degrees. This allows the pin 4 to have higher resistance to external forces. That is, when the barb structure 421 bites into the inner circumferential surface of the insertion hole 321, the barb structure 421 receives a resistance force in a direction from the inner circumferential surface toward the axial center. Since the angle G2 between the connection surface 423 forming the barb structure 421 and the axial direction is 85 degrees or more and 95 degrees or less, and the connection surface 423 is approximately perpendicular to the axial direction, the barb structure 421 is less likely to deform even when subjected to such a resistance force. Therefore, the barb structure 421 is appropriately bitten into the inner circumferential surface of the insertion hole 321, and the pin 4 has higher resistance to an external force in a direction to pull out from the insertion hole 321.

[0034] The length L1 of the fitting portion 42 in the axial direction (referring to the extension direction of the axis R) is 1 to 2 times the outer diameter D of the body portion 41. This provides the pin 4 with high resistance to external forces and improves the product yield. If the length L1 of the fitting portion 42 is small, the range in which the barb structure 421 bites into the inner peripheral surface of the insertion hole 321 becomes narrow, which may reduce the resistance of the pin 4 to external forces. On the other hand, if the length L1 of the fitting portion 42 is large, the pin 4 may be easily broken, which may reduce the product yield. By setting the length L1 to 1 to 2 times the outer diameter D, such adverse effects are prevented, and the pin 4 has high resistance to external forces and improves the product yield.

[0035] As shown in FIG. 4, the depth L2 of the insertion hole 321 of the outer block 32 is greater than the length L1 of the fitting portion 42 in the axial direction. Therefore, when the fitting portion 42 is press-fitted into the insertion hole 321, the fitting portion 42 and a part of the body portion 41 are inserted into the insertion hole 321. The outer diameter D of the body portion 41 is equal to the maximum outer diameter of the fitting portion 42. This improves the resistance of the band 3 to external forces of the pin 4. That is, since the body portion 41 is cylindrical with an outer diameter greater than the inner diameter of the insertion hole 321, the entire outer circumferential surface of the body portion 41 contacts the inner circumferential surface of the insertion hole 321 when pressed, and moves at high speed along the contact surface. Therefore, strong frictional welding is generated between the outer circumferential surface of the body portion 41 and the inner circumferential surface of the insertion hole 321, and the body portion 41 and the insertion hole 321 are fixed to each other. This improves the resistance of the pin 4 to external forces.

[0036] Preferably, the depth L2 of the insertion hole 321 is equal to or less than the length L1 of the fitting portion 42 plus the outer diameter D of the body portion 41. That is, the axial length of the body portion 41 inserted into the insertion hole 321 is shorter than the outer diameter D of the body portion 41. This allows the band 3 to improve the yield of the product. If the body portion 41 inserted into the insertion hole 321 is too long, the body portion 41 will be subjected to a strong frictional force, and the fitting portion 42 will not be inserted all the way into the insertion hole 321, which may cause variation in product dimensions or breakage of the pin 4. By setting the depth L2 of the insertion hole 321 to equal to or less than the length L1 plus the outer diameter D, variation in product dimensions and breakage of the product are prevented, and the yield of the product is improved.

[0037] Fig. 6 is a cross-sectional view of the crown 21 of the timepiece body 2. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 1, showing only the vicinity of the crown 21.

[0038] Crown 21 has a columnar shaft portion 211 formed on the side of watch body 2 and inserted into insertion hole 22 penetrating the inside and outside of watch body 2, and an operation portion 212 formed on the end of shaft portion 211 and used by the user to perform a rotation operation. A recess 213 is formed on the end face of shaft portion 211 opposite operation portion 212 for engaging with a winding stem connected to a movement (not shown) built into watch body 2. As a result, in response to the user's rotation operation of operation portion 212, the winding stem connected to the movement rotates to adjust the time.

[0039] The crown 21 is connected to the watch body 2 by a pin 5. The pin 5 is made of a metal such as stainless steel or titanium, which has a hardness similar to or greater than the hardness of the surroundings of the insertion hole 22 of the watch body 2. The pin 5 has a columnar body 51 and a fitting portion 52 formed at one end of the body 51.

[0040] The insertion hole 22 of the watch body 2 is formed so that its inner diameter is smaller than the maximum value of the outer diameter of the body 51 of the pin 5 and the outer diameter of the fitting portion 52. The fitting portion 52 of the pin 5 is press-fitted into the insertion hole 22 of the watch body 2, and the fitting portion 52 fits into the insertion hole 22. This joins the watch body 2 and the pin 5.

[0041] Furthermore, the pin 5 is formed with a through hole 53 along the axial direction (the extension direction of the axis S of the body 51), and an engagement portion 54 that partially protrudes from the outer periphery of the body 51. The shaft portion 211 of the crown 21 is inserted into the through hole 53, and the operating portion 212 engages with the engagement portion 54. By engaging the operating portion 212 with the engagement portion 54, movement of the operating portion 212 in the axial direction is restricted. This connects the crown 21 to the watch body 2.

[0042] The shape of fitting portion 52 is the same as that of fitting portion 42 of pin 4. That is, fitting portion 52 has a shape in which multiple truncated cones are stacked coaxially with axis S of body portion 51, and fitting portion 52 is formed with barb structure 521 that protrudes toward body portion 51 over its entire circumference. Fitting portion 52 is symmetrical with respect to axis S, and barb structure 521 is formed over the entire circumference of the outer circumferential surface of fitting portion 52. This provides pin 5 with high resistance to external forces and high corrosion resistance.

[0043] Preferably, the fitting portion 52 is formed with a plurality of barb structures 521, and more preferably, with 3 to 5 barb structures 521. This allows the pin 5 to have higher resistance to external forces.

[0044] The barb structure 521 is formed by tapered surface 522 having a gradient such that the outer diameter decreases with increasing distance from body portion 51, and connecting surface 523 connecting multiple tapered surfaces 522. Since fitting portion 52 has tapered surface 522 that functions as a guide for aligning the axis of fitting portion 52 with the center of insertion hole 22, fitting portion 52 can easily fit evenly around the entire circumference of the inner circumferential surface of insertion hole 321, and therefore pin 4 has high resistance to external forces.

[0045] The tapered surface 522 is symmetrical about the axis S. This minimizes deformation of the insertion hole 22, and the pin 5 has higher resistance to external forces.

[0046] The gradient H1 of the tapered surface 522 with respect to the axial direction is preferably 5 degrees or more and 15 degrees or less, and more preferably 10 degrees. This allows the pin 5 to be properly inserted into the insertion hole 22, and the pin 5 has higher resistance to external forces.

[0047] The angle H2 of the connection surface 523 with respect to the axial direction is preferably 85 degrees or more and 95 degrees or less, and more preferably 90 degrees. This prevents the barb structure 521 from being deformed by the force from the insertion hole 22 and keeps the barb structure 521 properly embedded in the inner circumferential surface of the insertion hole 22, so that the pin 5 has higher resistance to external forces.

[0048] Body 51 is connected to fitting portion 52 and has a cylindrical first portion 511 having an outer diameter E equal to the maximum outer diameter of fitting portion 52, and a cylindrical second portion 512 having an outer diameter larger than that of first portion 511. Fitting portion 52 has length M1 in the axial direction that is at least one time and at most two times the outer diameter E of first portion 511. This provides pin 4 with high resistance to external forces and prevents pin 5 from becoming easily broken, improving product yield.

[0049] Because the outer diameter of the second portion 512 is larger than the outer diameter E of the first portion 511, when the fitting portion 52 is press-fitted into the insertion hole 22, the fitting portion 52 and the first portion 511 of the body portion 51 are inserted into the insertion hole 22. Furthermore, the outer diameter E of the first portion 511 is equal to the maximum value of the outer diameter of the fitting portion 52. As a result, strong frictional welding is generated between the outer peripheral surface of the first portion 511 and the inner peripheral surface of the insertion hole 22, and the first portion 511 and the insertion hole 22 are fixed together, so that the pin 5 has high resistance to external forces.

[0050] Preferably, the length M2 in the axial direction of the first portion 511 is smaller than the outer diameter E of the first portion 511. That is, the length in the axial direction of the body 51 inserted into the insertion hole 22 is smaller than the outer diameter E of the first portion 511, which is the minimum value of the outer diameter of the body 51. This allows the pin 5 to be appropriately inserted into the insertion hole 22, prevents the pin 5 from breaking, and improves the product yield.

[0051] As described above, the pin (4, 5) according to the embodiment has a columnar body portion (41, 51) and a fitting portion (42, 52) formed at the end of the body portion (41, 51). The fitting portion (42, 52) is formed with a barb structure (421, 521) that protrudes toward the body portion (41, 51) around the entire circumference. This provides the pin (4, 5) with high resistance to external forces.

[0052] Preferably, the length (L1, M1) of the fitting portion (42, 52) in the axial direction is equal to or greater than one time and equal to or less than two times the outer diameter (D, E) of the body portion (41, 51). This provides the pins (4, 5) with higher resistance to external forces and improves the product yield.

[0053] Also, preferably, the fitting portion (42, 52) is formed with three to five barb structures (421, 521), which provides the pin 4 with higher resistance to external forces.

[0054] The barb structure (421, 521) is formed by a plurality of tapered surfaces (422, 522) whose outer diameter decreases with increasing distance from the body portion (41, 51), and a connecting surface (423, 523) connecting the plurality of tapered surfaces (422, 522). Preferably, the angle (G2, H2) of the connecting surface (423, 523) with respect to the axial direction is 85 degrees or more and 95 degrees or less. This provides the pin (4, 5) with higher resistance to external forces.

[0055] Also, preferably, the gradient (G1, H1) of the tapered surface (422, 522) with respect to the axial direction is equal to or greater than 5 degrees and equal to or less than 15 degrees, so that the pins (4, 5) have higher resistance to external forces.

[0056] The watch band 3 according to the embodiment has a pin 4, an inner link 31 with a through hole 311 formed therein through which a body portion 41 of the pin 4 is inserted, and an outer link 32 with an insertion hole 321 formed therein into which a fitting portion 42 of the pin 4 is inserted and which fits with the pin 4. The fitting portion 42 and a part of the body portion 41 are inserted into the insertion hole 321. This improves the resistance of the band 3 to external forces on the pin 4.

[0057] Also, preferably, the depth L2 of the insertion hole 321 is equal to or less than the length L1 in the axial direction of the fitting portion 42 plus the outer diameter D of the body portion 41. Thereby, the band 3 improves the product yield.

[0058] The following modified examples may be applied to the timepiece 1 according to this embodiment.

[0059] In the above description, the body 41 and the fitting portion 42 of the pin 4 have a circular cross-sectional shape, but are not limited to this example. The body 41 and the fitting portion 42 may have an elliptical or polygonal cross-sectional shape. For example, the body 41 may be a square prism. In this case, the fitting portion 42 has a shape like a quadrangular pyramid stacked on top of each other. When the body 41 and the fitting portion 42 have a circular cross-sectional shape, the fitting portion 42 is held in the insertion hole 321 evenly over the entire circumference, so that the fitting portion 42 has the highest resistance to external forces. However, even when the body 41 and the fitting portion 42 have a cross-sectional shape other than a circle, the fitting portion 42 is held in the insertion hole 321 over the entire circumference, so that the fitting portion 42 can have a certain degree of high resistance to external forces. Similarly, the body 51 and the fitting portion 52 of the pin 5 may have an elliptical or polygonal cross-sectional shape.

[0060] In the above description, the fitting portion 42 of the pin 4 is fitted into the insertion hole 321 by press-fitting, but the present invention is not limited to this example. The fitting portion 42 may be press-fitted into the insertion hole 321 with an adhesive applied thereto in advance, and may be fitted into and fixed to the insertion hole 321. This further improves resistance to external forces. In addition, the inside of the insertion hole 321 is filled with adhesive, which prevents liquids and the like from entering and improves corrosion resistance. Similarly, the fitting portion 52 of the pin 5 may be press-fitted into the insertion hole 22 with an adhesive applied thereto in advance, and may be fitted into and fixed to the insertion hole 22.

[0061] In the above-described embodiment, the pin 4 connects the inner link 31 and the outer link 32, and the pin 5 connects the crown 21 and the watch body 2, but this is not limited to the above example, and the pin 4 or 5 may be used to connect other watch parts. For example, if the watch body 2 is equipped with a push button or the like, the pin 5 may be used to connect the push button and the watch body 2.

[0062] It should be understood by those skilled in the art that various changes, substitutions, and modifications can be made to the present invention without departing from the scope of the present invention. For example, the above-described embodiments and modifications may be appropriately combined within the scope of the present invention. [Explanation of symbols]

[0063] 1. Watch 3 Bands 31 Inner pieces 32 Outside piece 4 pin 41 Torso 42 Fitting part 421 Barb structure 422 Tapered surface 423 Connection Surface

Claims

1. A watch band, comprising: A pin for connecting timepiece parts, the pin having a columnar body and a fitting portion formed at an end of the body, the fitting portion having a barb structure protruding toward the body over the entire circumference, the barb structure being formed by a tapered surface whose outer diameter decreases as it moves away from the body, and a connecting surface connecting the tapered surfaces; an inner piece having a through hole through which the body of the pin is inserted; an outer piece having an insertion hole into which the fitting portion of the pin is inserted and into which the pin is fitted; The fitting portion and a part of the body portion are inserted into the insertion hole, The part of the body and the inner circumferential surface of the insertion hole are fixed to each other. A band that features

2. The length of the fitting portion in the axial direction is equal to or greater than 1 time and equal to or less than 2 times the outer diameter of the body portion.

2. The band according to claim 1.

3. The fitting portion is formed with 3 to 5 of the barb structures.

3. A band as claimed in claim 1 or 2.

4. The body portion and the fitting portion have a circular cross-sectional shape. A band according to any one of claims 1 to 3.

5. The depth of the insertion hole is equal to or less than the sum of the axial length of the fitting portion and the outer diameter of the body portion. A band according to any one of claims 1 to 4.

6. The diameter of the inner peripheral surface of the insertion hole is smaller than the outer diameter of the body portion, A band according to any one of claims 1 to 5.

7. The gradient of the tapered surface relative to the axial direction is 5 degrees or more and 15 degrees or less. A band according to any one of claims 1 to 6.

8. The angle of the connection surface with respect to the axial direction is 85 degrees or more and 95 degrees or less. A band according to any one of claims 1 to 7.

9. A watch comprising a band according to any one of claims 1 to 8.

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