Band length adjusting mechanism and watch band

Abstract

To provide a reliable and easy-to-handle band length adjusting mechanism and watch band.SOLUTION: An inner piece 60 is provided to rotate in a first direction at a predetermined angle with respect to an outer piece 70, and to move in a longitudinal direction of a band with respect to the outer piece 70 in a rotating state. A connection pin 80 is fixed to the inner piece 60 and rotates integrally with the inner piece 60. The outer piece 70 is provided with a communication passage 71 having a plurality of support parts 71b aligned in the longitudinal direction for supporting the connection pin 80, and a slide part 71a communicated with the plurality of support parts 71b in the longitudinal direction through which the connection pin 80 can pass when the connection pin 80 rotates at a predetermined angle together with the inner piece 60. The support parts 71b include a first regulation wall 71c for regulating the movement of the connection pin 80 in the longitudinal direction and regulating the rotation in the second direction opposite to the first direction.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a band length adjustment mechanism and a watch band. [Background technology]

[0002] Patent document 1 discloses the configuration of a band length adjustment mechanism in which an adjustment inner piece is provided with a support portion that supports the adjustment pin, and a communication portion formed between the support portions that allows the adjustment pin to pass through when facing a specific direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-171349 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration of Patent Document 1, when adjustment is not being made, the adjustment pin is supported at two circular points that make up the communicating portion. Therefore, when the band is pulled, the adjustment pin bites into the communicating portion, causing wear on the communicating portion and creating concerns about its strength. [Means for solving the problem]

[0005] The band length adjustment mechanism comprises a first link, a second link, and a connection pin connecting the first link and the second link, wherein the first link rotates relative to the second link in a first direction by a predetermined angle and is movable in the longitudinal direction of the band relative to the second link in the rotated state, the connection pin is fixed to the first link and rotates integrally with the first link, and the second link is provided with a communication passage that supports the connection pin and has a plurality of support portions aligned in the longitudinal direction and a slide portion that connects the plurality of support portions in the longitudinal direction and through which the connection pin can pass when the connection pin rotates together with the first link to the predetermined angle, and the support portion has a first restriction wall that restricts movement of the connection pin in the longitudinal direction and restricts rotation in a second direction opposite to the first direction.

[0006] The watch band is provided with the band length adjustment mechanism described above. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] FIG. 4 is a perspective view showing the configuration of a band length adjustment mechanism. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 4 is a side view showing the configuration of the band length adjustment mechanism. [Figure 6] FIG. 4 is a cross-sectional view showing the configuration of a band length adjustment mechanism. [Figure 7] FIG. 10 is a side view showing how to adjust the band length. [Figure 8] FIG. 10 is a perspective view showing a configuration in which the band length adjustment mechanism is applied to a watch band. [Figure 9] FIG. 10 is a perspective view showing a configuration in which the band length adjustment mechanism is applied to a watch band. [Figure 10] FIG. 10 is a perspective view showing a configuration in which the band length adjustment mechanism is applied to a clasp. [Figure 11] FIG. 10 is a side view showing a configuration in which the band length adjustment mechanism is applied to a clasp. [Figure 12] FIG. 10 is a perspective view showing a configuration in which the band length adjustment mechanism is applied to a buckle. [Figure 13] FIG. 10 is a side view showing a configuration in which the band length adjustment mechanism is applied to a buckle. [Figure 14] FIG. 10 is a side view showing the configuration of a modified band length adjustment mechanism. [Figure 15] FIG. 10 is a side view showing the configuration of a modified band length adjustment mechanism. [Figure 16] FIG. 10 is a side view showing the configuration of a modified band length adjustment mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0008] The configuration of the band length adjustment mechanism 50 and the watch band 110 will be described below with reference to the drawings. In the following drawings, three mutually perpendicular axes will be referred to as the X-axis, Y-axis, and Z-axis. The direction along the X-axis will be referred to as the "X-direction," the direction along the Y-axis will be referred to as the "Y-direction," and the direction along the Z-axis will be referred to as the "Z-direction." The direction of the arrow is the + direction, and the direction opposite the + direction is referred to as the - direction. Note that a view from the +Z direction or the -Z direction is also referred to as a planar view or planar view. Note that the X-direction will also be referred to as the longitudinal direction. The Y-direction will also be referred to as the lateral direction.

[0009] First, the configuration of the timepiece 100 will be described with reference to FIG.

[0010] As shown in Fig. 1, timepiece 100 is a wristwatch worn on a user's wrist, and includes a cylindrical exterior case 1 with a dial 2 disposed inside the exterior case 1. Timepiece 100 also includes a movement (not shown), and hour hand 3A, minute hand 3B, and second hand 3C that indicate time information. Dial 2 has a scale for indicating the time.

[0011] The watch 100 also includes a band 10 and a clasp 20. The watch 100 shown in FIG. 1 has the clasp 20 folded. The clasp 20 has a metal lower plate member 21 and a metal middle plate member 22 whose end is connected to the lower plate member 21. A clasp 20 configured in this way is called, for example, a three-fold clasp.

[0012] Next, the configuration of the band length adjustment mechanism 50 will be described with reference to FIG.

[0013] As shown in Fig. 2, the band length adjustment mechanism 50 is provided in a portion of the band 10 of the watch 100 shown in Fig. 1 (part A in Fig. 1). For ease of explanation, the band length adjustment mechanism 50 in Fig. 1 and the band length adjustment mechanism 50 in Fig. 2 have different shapes. The band length adjustment mechanism 50 is equipped with a center link 60 as the first link, an outer link 70 as the second link, and a connecting pin 80 that connects the center link 60 and the outer link 70. The center link 60, outer link 70, and connecting pin 80 are made of metal such as stainless steel or titanium.

[0014] In this embodiment, the connection pin 80 is formed integrally with the center link 60. The center link 60 is provided so as to rotate, for example, at a predetermined angle in the first direction relative to the outer link 70. In other words, when the center link 60 is rotated, the connection pin 80 also rotates. Because the center link 60 and the connection pin 80 are formed integrally, there is no play or misalignment, and the connection pin 80 can be made to follow the rotation of the center link 60.

[0015] The center link 60 is provided so as to be movable in the longitudinal direction of the band 10 relative to the outer link 70 when rotated at a predetermined angle (see FIG. 7). Specifically, the center link 60 can pass through the slide portion 71a of the communication passage 71 provided in the outer link 70 in the longitudinal direction via the connecting pin 80.

[0016] The communication passage 71 of the outer link 70 is provided with a support portion 71b that supports the connection pin 80 (see FIG. 5). A plurality of support portions 71b are provided in the longitudinal direction. In this embodiment, three support portions 71b are provided in the longitudinal direction of the communication passage 71. In other words, the length of the band 10 can be adjusted in three stages.

[0017] The communication passage 71 is also provided with a slide portion 71a that connects the support portions 71b in the longitudinal direction and through which the connection pin 80 can pass. As described above, the slide portion 71a is the portion through which the connection pin 80 passes when the center piece 60 rotates by a predetermined angle.

[0018] Next, the configuration of the center link 60 and the outer link 70 will be described with reference to FIGS.

[0019] As shown in FIG. 3, the center piece 60 has a center piece main body 61 in the shape of a rectangular parallelepiped, and connection pins 80 that protrude from a side surface 61a of the center piece main body 61 in the +Y direction and the −Y direction.

[0020] The connection pin 80 is supported by the support portion 71b of the communication passage 71 of the outer link 70. The cross-sectional shape of the supported portion 81 of the connection pin 80 supported by the support portion 71b is formed with rounded corners. In other words, when viewed from the direction of the side surface 61a of the inner link 60, i.e., the Y direction, it is formed into a rectangular shape with arcs at the corners. Forming it with rounded corners prevents the connection pin 80 from interfering with the through hole of the support portion 71b, thereby reducing wear on the connection pin 80 and the support portion 71b.

[0021] The length of the connection pin 80 is such that when the inner link 60 and outer link 70 are combined, they do not protrude from the communication passage 71 of the outer link 70. By making the length such that they do not protrude from the outer link 70, it is possible to prevent the connection pin 80 from coming into contact with the user when the user is using the timepiece 100.

[0022] In this way, because the cross section of the connection pin 80 is rounded, when the connection pin 80 rotates relative to the support part 71b, it is possible to prevent interference with the through hole of the support part 71b and difficulty in rotation, allowing for smooth rotation. In addition, it is possible to prevent wear on the support part 71b and the connection pin 80.

[0023] 4, the outer link 70 is formed into a generally concave shape in a plan view. Specifically, the outer link 70 has a first wall 72a, a second wall 72b arranged parallel to the first wall 72a at a predetermined distance, and a third wall 72c connecting an end of the first wall 72a and an end of the second wall 72b.

[0024] When viewed from the Y direction, the first wall 72a and the second wall 72b are provided with through holes that follow the shape of the communication passage 71. In other words, the first wall 72a and the second wall 72b both have communication passages 71 of the same shape formed therein.

[0025] 5, the communication passage 71 has the slide portion 71a and the support portion 71b as described above. The support portion 71b has a first restriction wall 71c that restricts movement of the connection pin 80 in the longitudinal direction and restricts rotation in a second direction opposite to the first direction.

[0026] In this way, because first restriction wall 71c is provided, even when band 10 is pulled, connection pin 80 can be fixed by a surface rather than by a point, so band 10 can be firmly fixed so that its length does not change. It is also possible to restrict rotation in the second direction, which helps prevent malfunctions when using the timepiece 100.

[0027] Furthermore, support portion 71b has second restriction wall 71d that restricts connection pin 80 from rotating beyond a predetermined angle. In this way, because second restriction wall 71d is provided, when connection pin 80 is rotated 90° in the first direction to adjust the length of band 10, rotation beyond the predetermined angle of 90° is prevented. This makes it possible to maintain an angle at which connection pin 80 can pass through slide portion 71a, in other words, horizontality, and allows connection pin 80 to pass smoothly through communication passage 71. Since smooth passage is possible, wear on connection pin 80 and communication passage 71 can be reduced.

[0028] 6, parts of the outer periphery of the support portion 71b are arranged on a plurality of imaginary circles 75 that overlap in the longitudinal direction in a cross-sectional view. Since the communicating passage 71 of this embodiment has three support portions 71b, the three imaginary circles 75 are also arranged so as to overlap in the longitudinal direction.

[0029] The slide portion 71a and the first restriction wall 71c are disposed within the overlapping area of ​​three imaginary circles 75. In this way, the support portion 71b including the slide portion 71a and the first restriction wall 71c is provided within the overlapping area of ​​multiple imaginary circles 75, so that the pitch interval L1 between adjacent support portions 71b can be reduced, and the band length adjustment mechanism 50 can be adjusted more precisely.

[0030] Specifically, compared to a communication path in which imaginary circles 75, slide portions 71a, and imaginary circles 75 are alternately arranged, the communication path 71 of this embodiment has slide portions 71a arranged among overlapping imaginary circles 75, which makes it possible to further narrow the pitch interval L1 of the support portions 71b and finely adjust the length of the band 10. The pitch interval L1 of the support portions 71b is, for example, 2 mm.

[0031] Furthermore, compared to a case where the size of the imaginary circles is reduced and imaginary circles 75, slide portions 71a, and imaginary circles 75 are alternately arranged so as to have the same pitch interval L1 as in this embodiment, the communicating passages 71 of this embodiment have support portions 71b and the like formed to overlap adjacent imaginary circles 75, which allows for fine adjustments and enables the size of the connection pins 80 to be increased, thereby improving the strength of the connection pins 80. Also, the communicating passages 71 are easier to process.

[0032] Next, a method of operating the band length adjustment mechanism 50 will be described with reference to FIGS.

[0033] As shown in Figure 5, when the timepiece 100 is in normal use, the center link 60 and outer link 70 are arranged to extend in the longitudinal direction. The side surface 82 of the connecting pin 80 of the center link 60 is in contact with the surface of the first restriction wall 71c of the communication passage 71 of the outer link 70.

[0034] Therefore, as described above, even when the band 10 is pulled, the connection pin 80 is supported by surface contact rather than by point contact, so that the band 10 can be firmly supported and fixed so that its length does not change.

[0035] Next, when adjusting the length of the band 10, the center link 60 is rotated 90° in the first direction relative to the outer link 70, as shown in Figure 7. Note that before adjusting the length of the band 10, the position of the connection pin 80 is located at adjustment point B1. If it is desired to increase the length of the band 10, the position of the connection pin 80 is moved from adjustment point B1 to adjustment point B2.

[0036] Specifically, when the inner link 60 is rotated 90° relative to the outer link 70, the supported portion 81 of the connection pin 80, which had been facing in the Z direction, now faces in the longitudinal direction. In other words, the sliding portion 71a of the communication passage 71 and the side surface 82 of the connection pin 80 become parallel to each other.

[0037] Furthermore, since the support portion 71b of the communication passage 71 has the second restriction wall 71d, the side surface 82 of the connection pin 80 comes into contact with the second restriction wall 71d, preventing the connection pin 80 from rotating by 90° or more. Therefore, as described above, the connection pin 80 can be maintained at an angle that allows it to pass through the slide portion 71a, in other words, in a horizontal state.

[0038] Next, the center piece 60 is moved to pass the connection pin 80 through the slide portion 71a in the longitudinal direction. This allows the position of the connection pin 80 to be moved from adjustment position B1 to adjustment position B2. Furthermore, because the connection pin 80 maintains a horizontal state, it can pass smoothly through the communication passage 71. Because it is possible to pass the connection pin 80 smoothly, wear on the connection pin 80 and the communication passage 71 can be reduced.

[0039] Next, the center link 60 is rotated relative to the outer link 70 in a second direction opposite to the first direction, so that the center link 60 and outer link 70 extend in the longitudinal direction. As a result, as shown in Figure 5, the side surface 82 of the connection pin 80 comes into contact with the first restriction wall 71c, enabling it to be securely supported and fixed, and the timepiece 100 can be returned to its usable state.

[0040] On the other hand, if it is desired to shorten the length of the band 10, the position of the connection pin 80 is moved from the adjustment point B1 to the adjustment point B3. It is also possible to move it from the adjustment point B2 to the adjustment point B3.

[0041] The adjustment method is the same as that described above. Specifically, the center link 60 is rotated 90° in the first direction relative to the outer link 70, and the position of the connection pin 80 is moved from adjustment point B1 to adjustment point B3. After the movement, the center link 60 is rotated in the second direction relative to the outer link 70, returning the timepiece 100 to its usage state.

[0042] Next, an example in which the band length adjustment mechanism 50 is applied to a watch band 110 will be described with reference to FIGS.

[0043] As shown in Figures 8 and 9, a watch band 110 has the center link 60 and outer link 70 of the above-described structure. Although the center link 60 and outer link 70 shown in Figures 3 and 4 have different shapes, they function similarly as a band length adjustment mechanism 50.

[0044] In the watch band 110, the center link 60 and the outer link 70 are connected via a connecting pin 80. The outer link 70 and the center link 160 are connected via a pin (not shown). The center link 60 and the outer link 170 are connected via a pin (not shown). The watch band 110 is formed by repeatedly connecting the center links 160 and the outer links 170.

[0045] The watch band 110 shown in Figure 8 shows a state in which the length of the band 10 has been adjusted to its shortest. Specifically, the position of the connection pin 80 is located at adjustment point B3. The watch band 110 shown in Figure 9 shows a state in which the length of the band 10 has been adjusted to its longest. Specifically, the position of the connection pin 80 is located at adjustment point B2. The method for adjusting the length of the band 10 is the same as the method described above.

[0046] As described above, the band length adjustment mechanism 50 of this embodiment is a band length adjustment mechanism 50 comprising a center link 60, an outer link 70, and a connecting pin 80 connecting the center link 60 and the outer link 70, wherein the center link 60 rotates relative to the outer link 70 by a predetermined angle in a first direction and is movable in the longitudinal direction of the band 10 relative to the outer link 70 while rotated, the connecting pin 80 is fixed to the center link 60 and rotates integrally with the center link 60, the outer link 70 is provided with a communicating passage 71 that supports the connecting pin 80 and has a plurality of support portions 71b aligned in the longitudinal direction and a sliding portion 71a that connects the plurality of support portions 71b in the longitudinal direction and through which the connecting pin 80 can pass when the connection pin 80 rotates by a predetermined angle together with the center link 60, the supporting portion 71b has a first restricting wall 71c that restricts movement of the connection pin 80 in the longitudinal direction and restricts rotation in a second direction opposite to the first direction.

[0047] With this configuration, the connecting pin 80 is provided in the center link 60 and the communicating passage 71 is provided in the outer link 70, so that by rotating the center link 60 in a first direction, the connecting pin 80 moves within the communicating passage 71, thereby adjusting the length of the band 10. On the other hand, by rotating the center link 60 in a second direction and returning it to its original position, the first restricting wall 71c prevents the connecting pin 80 from rotating in the second direction. Furthermore, because the first restricting wall 71c is provided, even when the band 10 is pulled, the connecting pin 80 can be fixed by a surface rather than a point, improving strength in the pulling direction and allowing for a more secure fixation.

[0048] Furthermore, even if the band length adjustment mechanism 50 is provided, the number of parts can be kept from increasing. Furthermore, the overall structure of the timepiece 100 does not become complicated, and the manufacturing costs of the watch band 110 can be reduced. Additionally, the length can be adjusted while on the go, without the need for tools or jigs.

[0049] Furthermore, in the band length adjustment mechanism 50 of this embodiment, the support portion 71b preferably includes a second restriction wall 71d that restricts rotation of the connection pin 80 beyond a predetermined angle. With this configuration, the provision of the second restriction wall 71d prevents the connection pin 80 from rotating beyond a predetermined angle when rotated in the first direction when adjusting the length of the band 10. This makes it possible to maintain an angle at which the connection pin 80 can pass through the slide portion 71a, allowing the connection pin 80 to move smoothly within the communication passage 71. Because smooth movement is possible, wear on the connection pin 80 and the communication passage 71 can be reduced.

[0050] Furthermore, in band length adjustment mechanism 50 of this embodiment, it is preferable that, in a cross-sectional view, part of the outer periphery of support portion 71b is arranged on a plurality of imaginary circles 75 that overlap in the longitudinal direction, and slide portion 71a and first restriction wall 71c are arranged within imaginary circles 75. With this configuration, support portion 71b and the like are provided within the area where the plurality of imaginary circles 75 overlap, so that it is possible to reduce pitch interval L1 between the plurality of support portions 71b, and the length of band 10 can be finely adjusted.

[0051] Furthermore, in the band length adjustment mechanism 50 of this embodiment, it is preferable that the first link is the center link 60, the second link is the outer link 70, and the communication passage 71 is a through-hole. With this configuration, the communication passage 71 formed as a through-hole is provided in the outer link 70, so that the communication passage 71 and the connecting pin 80 can be seen from outside the outer link 70, and the angle and position of the connecting pin 80 can be checked while making adjustments.

[0052] In addition, in the band length adjustment mechanism 50 of this embodiment, it is preferable that the center link 60 and the connection pin 80 are configured as a single component. With this configuration, because they are configured as a single component, it is possible to reduce rattling and wear between the center link 60 and the connection pin 80. Furthermore, the angle between the center link 60 and the connection pin 80 can be used without adjusting it.

[0053] Furthermore, in the band length adjustment mechanism 50 of this embodiment, the cross-sectional shape of the supported portion 81 of the connection pin 80 that is supported by the support portion 71b is preferably formed with rounded corners. With this configuration, the cross-sectional shape of the connection pin 80 is rounded, so that when the connection pin 80 rotates relative to the support portion 71b, it is possible to prevent interference with the through-hole of the support portion 71b or difficulty in rotation, allowing for smooth rotation. In addition, it is possible to prevent wear on the support portion 71b and the connection pin 80.

[0054] Furthermore, the watch band 110 of this embodiment is equipped with the above-described band length adjustment mechanism 50. This configuration makes it possible to provide a watch band 110 that allows the length of the band 10 to be smoothly adjusted, and that can also securely fasten the band 10 when not being adjusted.

[0055] Furthermore, in the watch band 110 of this embodiment, the links of the band 10 are preferably made up of center links 60 and outer links 70. With this configuration, the center links 60 and outer links 70 are combined together, so the length of the band 10 can be smoothly adjusted, and the band 10 can be firmly fixed when not being adjusted.

[0056] Modifications of the above-described embodiment will now be described.

[0057] As described above, the band length adjustment mechanism 50 is not limited to being applied to a portion of the band 10 of the watch band 110, and may be applied as shown in Figures 10 and 11. In a modified watch band 110A shown in Figures 10 and 11, the band length adjustment mechanism 50 is applied to a portion of the clasp 111 that is connected so as to be foldable in a Z shape.

[0058] As shown in Figures 10 and 11, the clasp 111 has an end member 112 connected to the band 10 (not shown), an intermediate member 113 connected to the end member 112, and a cover member 270 connected to the intermediate member 113 and the link 60.

[0059] The cover member 270 functions as the outer link 70. The cover member 270 is provided with a communication passage 71. When adjusting the length of the band 10, the position of the connection pin 80 is adjusted within the range of adjustment points B1 to B3 by rotating the inner link 60 90 degrees in the first direction relative to the cover member 270.

[0060] Furthermore, in the modified watch band 110A, it is preferable that at least one of the center link 60 and the outer link 70 is connected to the clasp 111. With this configuration, it is possible to provide a watch band 110A in which the center link 60 and the outer link 70 are connected to the clasp 111.

[0061] As described above, the band length adjustment mechanism 50 is not limited to being applied to a portion of the band 10 of the watch band 110, and may be applied as shown in Figures 12 and 13. In a modified watch band 110B shown in Figures 12 and 13, the band length adjustment mechanism 50 is applied to a portion of the buckle 200.

[0062] As shown in Figures 12 and 13, buckle 200 includes a tip holder 370, an intermediate member 113, an end member 112, an outer link 70 connected to end member 112, and a center link 60 connected to outer link 70. Watchband 110B includes band 10 connected to center link 60 and a tip-side band (not shown). The tip-side band has multiple holes for length adjustment, one of which engages with a pin provided on tip holder 370. The user of watchband 110B selects one of the multiple holes to fit the size of their wrist and engages it with the pin. Band 10 and the tip-side band are made of materials such as leather, urethane, or silicone.

[0063] The outer link 70 is provided with a communication passage 71. The center link 60 is provided with a connection pin 80. The method for adjusting the length of the band 10 is the same as the method described above. With this configuration, for example, whereas previously it was only possible to adjust the pitch at 6 mm intervals, which is the spacing between the multiple holes provided in the tip side band, it is now possible to adjust the pitch at 2 mm intervals.

[0064] Furthermore, in the modified watch band 110B, it is preferable that at least one of the center link 60 and the outer link 70 is connected to the buckle 200. With this configuration, it is possible to provide a watch band 110B in which the center link 60 and the outer link 70 are connected to the buckle 200.

[0065] As described above, the present invention is not limited to providing second restriction wall 71d in communicating passage 71, and communicating passage 71 may have the configuration shown in Fig. 14. Band length adjustment mechanism 50A of the modified example shown in Fig. 14 does not have second restriction wall 71d provided in communicating passage 71, specifically, in support portion 71b.

[0066] With this configuration, at least one first restriction wall 71c is provided, so even when the band 10 is pulled, it can be supported and fixed by a surface, ensuring a firm fixation. Furthermore, although a second restriction wall 71d is not provided, the sliding portion 71a alone can restrict rotation of the connection pin 80 beyond a predetermined angle. Furthermore, when the timepiece 100 is used normally, the connection pin 80 can be prevented from rotating in the second direction.

[0067] As described above, the predetermined angle is not limited to 90° and may be, for example, an angle θ as shown in Fig. 15. In a modified band length adjustment mechanism 50B shown in Fig. 15, the angle θ of the first restriction wall 71c is inclined at about 60° with respect to the horizontal. In other words, the predetermined angle does not have to be 90° and may be less than 90°.

[0068] By doing this, when adjusting the length of the band 10, the length can be adjusted by simply rotating the center link 60, i.e., the connecting pin 80, by a small angle, without rotating it 90 degrees. In other words, the length can be adjusted even with a small amount of rotation.

[0069] In addition, in the band length adjustment mechanism 50 of this embodiment, the predetermined angle is preferably 90° or less. With this configuration, since the predetermined angle is set to 90° or less, the length of the band 10 can be adjusted without rotating it all the way to 90°. In other words, adjustment can be made by simply gently rotating the center link 60.

[0070] As described above, the communication passage 71 of the outer link 70 is not limited to being a closed area, and as shown in FIG. 16, the communication passage 71 may be partially open. As shown in FIG. 16, the communication passage 71 of the modified band length adjustment mechanism 50C is open at one end of the outer link 70. Because the communication passage 71 is open, the inner link 60 and the connection pin 80 can be inserted into the communication passage 71 through the open portion. When inserting, for example, the inner link 60 is rotated 90 degrees relative to the outer link 70. This makes it easy to assemble and disassemble the inner link 60 and the outer link 70. Furthermore, the outer link 70 may not be an integrated structure, but may be disassembled into upper and lower halves, for example, so that the connection pin 80 can be inserted between them.

[0071] As described above, the first link is the center link 60 and the second link is the outer link 70, but the first link may be the outer link 70 and the second link may be the center link 60. Specifically, a configuration may be adopted in which a communication passage 71 is provided in the center link 60 and a connection pin 80 is provided in the outer link 70. With this configuration, the outer link 70 can be rotated 90 degrees relative to the center link 60 to adjust the length, and then the outer link 70 can be returned to its original position, thereby enabling the use as a watch band 110 with a band length adjustment mechanism 50. Furthermore, because the communication passage 71 in the center link 60 is not visible from the outside, the aesthetic appeal of the watch 100 can be improved.

[0072] Furthermore, in the band length adjustment mechanism 50 of this embodiment, it is preferable that the first link is the outer link 70 and the second link is the center link 60. With this configuration, the communication passage 71 is provided in the second link, which is the center link 60, so that the communication passage 71, which has a shape in which multiple support portions 71b are connected in the longitudinal direction, can be made less visible to the user, improving aesthetics.

[0073] As described above, the connection pin 80 is not limited to being formed integrally with the center piece main body 61, but may be configured so as to be able to rotate together, and the center piece main body 61 may be provided with a through-hole and the connection pin 80 may be inserted into the through-hole.

[0074] As described above, adjustment of the band length adjustment mechanism 50 is not limited to rotating the center link 60 relative to the outer link 70 in a first direction, but the band length adjustment mechanism 50 may also be adjusted by rotating the center link 60 relative to the outer link 70 in a second direction.

[0075] As described above, the band length adjustment mechanism 50 is not limited to being applied to one location on the watch band 110, but may be applied to two or more locations. [Explanation of symbols]

[0076] 1...external case, 2...dial, 3A...hour hand, 3B...minute hand, 3C...second hand, 10...band, 20...clasp, 21...lower plate member, 22...middle plate member, 50, 50A, 50B, 50C...band length adjustment mechanism, 60...center link as first link, 61...center link body, 61a...side surface, 70...outer link as second link, 71...connecting passage, 71a...sliding portion, 71b...supporting portion, 71c...first standard Control wall, 71d...second control wall, 72a...first wall, 72b...second wall, 72c...third wall, 75...imaginary circle, 80...connecting pin, 81...supported portion, 82...side surface, 100...watch, 110, 110A, 110B...watch band, 111...clasp, 112...end member, 113...intermediate member, 270...cover member, 160...center link, 170...outer link, 200...buckle, 370...tip holding portion.

Claims

1. The first piece, The second piece, a connection pin that connects the first piece and the second piece; A band length adjustment mechanism comprising: the first piece is provided so as to rotate relative to the second piece by a predetermined angle in a first direction and to be movable relative to the second piece in the longitudinal direction of the band in the rotated state, the connecting pin is fixed to the first piece and rotates integrally with the first piece, the second piece is provided with a communication passage having a plurality of support portions that support the connection pin and are arranged in the longitudinal direction, and a slide portion that communicates the plurality of support portions in the longitudinal direction and through which the connection pin can pass when the connection pin rotates to the predetermined angle together with the first piece, The support portion includes a first restricting wall that restricts movement of the connection pin in the longitudinal direction and restricts rotation in a second direction opposite to the first direction.

2. 2. The band length adjustment mechanism according to claim 1, The support portion includes a second restriction wall that restricts rotation of the connection pin beyond the predetermined angle.

3. 2. The band length adjustment mechanism according to claim 1, In a cross-sectional view, parts of an outer periphery of the support portion are arranged on a plurality of imaginary circles that overlap in the longitudinal direction, The slide portion and the first restriction wall are disposed within the imaginary circle.

4. 2. The band length adjustment mechanism according to claim 1, the first link is a center link, The second link is an outer link, The band length adjustment mechanism, wherein the communication passage is a through hole.

5. 2. The band length adjustment mechanism according to claim 1, The first link is an outer link, The second link is a center link, and the band length adjustment mechanism.

6. 2. The band length adjustment mechanism according to claim 1, A band length adjustment mechanism in which the first link and the connecting pin are configured as a single component.

7. 2. The band length adjustment mechanism according to claim 1, A band length adjustment mechanism, wherein the cross-sectional shape of the supported portion of the connection pin that is supported by the supporting portion is formed into a rounded shape.

8. 2. The band length adjustment mechanism according to claim 1, A band length adjustment mechanism, wherein the predetermined angle is 90° or less.

9. A watch band comprising the band length adjustment mechanism according to any one of claims 1 to 8.

10. 10. The watch band according to claim 9, The band link is composed of the first link and the second link.

11. 10. The watch band according to claim 9, At least one of the first link and the second link is connected to a clasp.

12. 10. The watch band according to claim 9, At least one of the first link and the second link is connected to a buckle.

Images