Bands, watches, and band length adjustment mechanisms

Abstract

To provide a band that has a sufficient length adjustment width and is easy to use.SOLUTION: The band includes: a first band attached to one end side of a watch body; a second band attached to the other end side of the watch body; and a clasp portion coupling the first band and the second band. The clasp portion includes a cover member and an adjustment portion. The adjustment portion includes: a pair of rail portions arranged along inner sides of two side walls of the cover member in a longitudinal direction of the cover member and having a plurality of grooves for length adjustment; an adjustment piece coupled at one end thereof to an end portion of the first band; a pressing portion disposed at an inner bottom surface of the cover member and including an elastic member; and an engagement pin inserted through the other end of the adjustment piece and engageable with the grooves of the rail portions. The pressing portion presses the engagement pin against the rail portions in a state in which the engagement pin is engaged with the grooves.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a band, a timepiece equipped with the band, and a band length adjustment mechanism. [Background technology]

[0002] Bands equipped with length adjustment mechanisms are known. For example, Patent Document 1 proposes a band whose overall length can be adjusted in stages according to the number of engagement grooves. According to this document, a guide groove and two engagement grooves continuous with the guide groove are formed symmetrically on both inner side surfaces of the cover member, and the engagement grooves are engaged with both ends of a spring bar provided at the tip of the end piece of the band. Furthermore, before engagement (Fig. 2), the cover member and the band are spaced apart. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-204813 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there was room for improvement in the band of Patent Document 1. For example, the length could only be adjusted in two stages using two engagement grooves, and the range of adjustment was small. Also, because the cover member and the band were separate before engagement, it was not easy for a general user to engage them. In other words, there was a need for a band that had sufficient length adjustment range and was easy to use. [Means for solving the problem]

[0005] A band according to one aspect of the present application comprises a first band attached to one end of a watch body, a second band attached to the other end of the watch body, and a clasp connecting the first band and the second band, the clasp including a cover member and an adjustment unit, the adjustment unit comprising a pair of rails arranged along the inside of the two side walls of the cover member in the longitudinal direction of the cover member and having a plurality of grooves for adjusting the length, an adjustment piece having one end connected to the end of the first band, a pressing unit arranged on the inside bottom surface of the cover member and including an elastic member, and an engagement pin inserted into the other end of the adjustment piece and capable of engaging with the groove of the rails, and when the engagement pin is engaged with the groove, the pressing unit presses the engagement pin against the rails.

[0006] A watch according to one aspect of the present application includes the above-described band.

[0007] A band length adjustment mechanism according to one aspect of the present application comprises a first band attached to one end of a watch body, a second band attached to the other end of the watch body, and a clasp that connects the first band and the second band, the clasp including a cover member and an adjustment unit, the adjustment unit including a pair of rails that are arranged along the inside of the two side walls of the cover member in the longitudinal direction of the cover member and have a plurality of grooves for adjusting the length, an adjustment piece that is connected at one end to the end of the first band, a pressing unit that is arranged on the bottom surface of the inside of the cover member and includes an elastic member, and a pressing member that is inserted into the other end of the adjustment piece and can engage with the grooves of the rails. and an engaging pin that can be adjusted by rotating the adjusting piece around the engaging pin as an axis so that the adjusting piece is approximately perpendicular to the cover member, and by pushing the adjusting piece toward the cover member of the clasp, the elastic member contracts and the engaging pin disengages from the groove.When the engaging pin is disengaged from the groove, the engaging pin is moved in the longitudinal direction of the cover member and released when the desired band length is reached, the force of the elastic member causes the adjusting piece to move in the direction away from the cover member of the clasp, and the engaging pin engages with the groove corresponding to the desired band length. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view showing an outline of the band according to the first embodiment. [Figure 2] Front view of the clock. [Figure 3] FIG. 10 is a transparent perspective view of the adjustment part when the clasp part is folded. [Figure 4] FIG. [Figure 5] FIG. 10 is a transparent perspective view of the adjustment part with the clasp part deployed. [Figure 6] FIG. [Figure 7] FIG. 10 is a cross-sectional side view of the main part showing a state during length adjustment. [Figure 8] FIG. [Figure 9]FIG. [Figure 10] Plan view of the band, focusing on the clasp. [Figure 11] FIG. 10 is an exploded perspective view of a pressing portion according to a second embodiment. [Figure 12] FIG. 10 is a cross-sectional side view of the main part showing the state of the pressing part when deployed. [Figure 13] FIG. [Figure 14] FIG. [Figure 15] FIG. 10 is a cross-sectional side view of the main part showing a state during length adjustment. [Figure 16] FIG. 10 is a cross-sectional side view of the main part showing a state during length adjustment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 ***Watch and Band Overview*** Fig. 1 is a perspective view showing an outline of the band, and Fig. 2 is a front view of the watch. Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] As shown in Figure 1, band 100 is composed of first band 10, second band 15, and clasp 35 that connects first band 10 and second band 15. Clasp 35 is composed of cover member 30, middle plate 31, and bottom plate 32, and by pressing buttons 33 provided on both sides of cover member 30, latch pin 41 is released, causing the band to unfold and extend as shown in Figure 1. As shown in Fig. 2, the end of the first band 10 is connected to the lug 5 on the 12 o'clock side of the watch 150. Similarly, the end of the second band 15 is connected to the lug 6 on the 6 o'clock side of the watch 150. Note that in Fig. 2, the watch 150 is a three-hand analog watch, but it is not limited to this and can be any device that is worn on the wrist, such as a digital watch or a smartwatch.

[0011] Return to Figure 1. The first band 10 is made up of a plurality of linked pieces 2. An end piece 2b at the end of the first band 10 is connected to an adjustment unit 50 in the cover member 30 via a link piece 11. The adjustment unit 50 will be described later. The second band 15 is made up of a plurality of linked pieces 2 and the like. An end piece 2c at the end of the second band 15 is connected to one end of a lower plate 32. A latch pin 41 is provided on the lower plate 32. The other end of the lower plate 32 is connected to one end of a middle plate 31. The other end of the middle plate 31 is connected to one end of the cover member 30.

[0012] The lower plate 32 is rotatably connected to the end piece 2c of the second band 15 and one end of the middle plate 31. The middle plate 31 is rotatably connected to one end of the cover member 30 and the other end of the lower plate 32. As a result, the clasp 35 can be switched between a state in which the middle plate 31 and the lower plate 32 are folded in a Z-shape and a state in which they are unfolded and extended. The cover member 30 is a buckle, and has an overall curved shape to allow for ease of wearing on the arm. The cover member 30 has a generally rectangular shape in plan view (FIG. 3), with its longitudinal direction oriented in the extension direction of the first band 10. The width of the cover member 30 in the short direction is also generally the same as the width of the first band 10. In the folded state, the middle plate 31 and the lower plate 32 have a curve similar to that of the cover member 30, following the curve of the back surface of the cover member 30. In a preferred example, each component of the band 100 is made of stainless steel. However, the material is not limited to stainless steel; any metal with hardness and excellent texture may be used, such as titanium.

[0013] ***Band length adjustment mechanism*** Fig. 3 is a transparent perspective view of the adjustment part with the clasp folded in. Fig. 4 is an exploded perspective view of the adjustment part. FIG. 3 is a see-through perspective view of the clasp 35 in the folded state, and the adjustment portion 50 inside the cover member 30 is observed through the view. Here, the configuration of the adjustment unit 50 will be described with reference to FIGS.

[0014] The adjustment unit 50 is composed of a pair of rails 20, 21, an adjustment piece 22, a pressing unit 23, an engagement pin 27, and the like. The rail portion 20 is a rail-shaped member arranged along the side wall 30a of the cover member 30, and one end of the rail portion 20 is provided with a through hole 20a for connection to the middle plate 31. The other end of the rail portion 20 is provided with a fixing hole 20b for fixing the rail portion 20 to the side wall 30a. Four grooves 29, which are length adjustment grooves, are provided at equal intervals on the side of the fixing hole 20b. The rail portion 21 is a member that pairs with the rail portion 20, is arranged along the side wall 30b of the cover member 30, and has the same configuration as the rail portion 20. More specifically, one end of the rail portion 21 is provided with a through hole 21a for connection to the middle plate 31, and the other end is provided with a fixing hole 21b for fixing the rail portion 21 to the side wall 30b. The rail portion 21 also has four length adjustment grooves 29.

[0015] The adjusting piece 22 has a protrusion 22a that protrudes toward the first band 10, and two branched protrusions 22b and 22c on the opposite side of the protrusion 22a. A through hole 4 is provided in the protrusion 22a for connecting to the connecting piece 11. The adjusting piece 22 is disposed between the rail portion 20 and the rail portion 21. The connecting piece 11 that connects the adjusting piece 22 to the end piece 2b of the first band 10 is also provided to have approximately the same size as the adjusting piece 22, and is disposed between the rail portion 20 and the rail portion 21. The space between protrusion 22b and protrusion 22c is a storage section 37, and pressing section 23 is housed in storage section 37. Protrusion 22b and protrusion 22c are each provided with a through hole 28 through which engagement pin 27 is inserted.

[0016] The pressing portion 23 is composed of a pressing case 24, a cover 25, two springs 26, and the like. The pressing case 24 is a rectangular parallelepiped main body case of the pressing part 23, and includes a storage section 24a that stores the two springs 26, and a through hole 8 provided below the storage section 24a. The pressing case 24 is disposed with its long sides oriented in the short direction of the cover member 30. The through hole 8 is a hole through which the engagement pin 27 is inserted, and is provided along the long side direction of the pressing case 24. In other words, the pressing case 24 has the through hole 8 provided in the short direction of the cover member 30.

[0017] Lid 25 is a member that serves as a lid for pressing case 24, and is formed to a size that fits into storage section 24a. Pressing section 23 is formed by setting lid 25 in a state in which two springs 26 are stored side by side in storage section 24a of pressing case 24. The top surface of lid 25 is assembled by abutting against the bottom surface of the inside of cover member 30. The spring 26 is an elastic member, and in a preferred example, a conical spring is used. The spring 26 may be made of, for example, piano wire. Any material that provides the necessary spring force may be used, such as hard steel wire or stainless steel wire. By using a conical spring, the contact height during compression can be made lower than with a normal coil spring, allowing the pressing unit 23 and the adjustment unit 50 to be configured more compactly.

[0018] With the pressing portion 23 housed in the storage portion 37 of the adjustment piece 22, the engagement pin 27 is inserted through the through hole 28 of the protrusion portion 22b, the through hole 8 of the pressing case 24, and the through hole 28 of the protrusion portion 22c, thereby integrating the pressing portion 23 and the adjustment piece 22. In the folded state shown in Figure 3, the engagement pin 27 is fitted into the innermost groove 29 of the four length adjustment grooves 29, which has the shortest band length. At this time, the engagement pin 27 is pressed toward the groove 29 by the pressing portion 23.

[0019] In other words, the adjustment unit 50 is arranged along the inside of the two side walls 30a, 30b of the cover member 30 in the longitudinal direction of the cover member 30 and comprises a pair of rail portions 20, 21 having multiple grooves 29 for adjusting the length, an adjustment piece 22 having one end connected to the end of the first band 10, a pressing portion 23 arranged on the inside bottom surface of the cover member 30 and including a spring 26 as an elastic member, and an engagement pin 27 inserted into the other end of the adjustment piece 22 and capable of engaging with the grooves 29 of the rail portions 20, 21, and when the engagement pin 27 is engaged with the groove 29, the pressing portion 23 presses the engagement pin 27 against the rail portions 20, 21. The adjustment piece 22 also has a storage section 37 for storing the pressing case 24, and the engagement pin 27 is inserted through the through hole 28 of the adjustment piece 22 and the through hole 8 of the pressing case 24 when the pressing case 24 is set in the storage section 37.

[0020] Fig. 5 is a see-through perspective view of the adjustment part with the buckle part deployed, and corresponds to Fig. 3. Fig. 6 is a see-through perspective view of the pressing part. FIG. 5 is a see-through perspective view of the adjustment section 50 with the clasp 35 unfolded, showing the state in which the adjustment piece 22 stands upright relative to the cover member 30. The adjustment piece 22 is provided so that it can stand upright, with the engagement pin 27 as the axis of rotation. As shown in FIG. 5, even with the clasp 35 unfolded, the engagement pin 27 is pressed into the groove 29 by the pressing section 23, so that it is fixed in the groove 29 at the shortest position among the four band lengths. FIG. 6 shows how the pressing section 23 presses the engagement pin 27. The restoring forces of the two springs 26 press down on the bottom of the storage section 24a, pressing the engagement pin 27 inserted into the through-hole 28. When adjusting the length of the band, the adjustment piece 22 is pushed toward the cover member 30 as shown by the white arrow in FIG. 5 with the clasp portion 35 unfolded.

[0021] ***How ​​to adjust the band length*** Fig. 7 is a side cross-sectional view of the main part showing a state when the length is adjusted, and Fig. 8 is a side cross-sectional view of the main part when folded. As shown in Figure 7, when adjusting piece 22 is pushed toward cover member 30, two springs 26 inside pressing portion 23 are compressed, and engaging pin 27 is released from groove 29, becoming slidable. With adjusting piece 22 in the pushed-in state, engaging pin 27 is moved to the position of one of the four grooves 29 that corresponds to the desired length, and then adjusting piece 22 is released, whereby engaging pin 27 engages with that groove 29. Figure 8 shows the state in which clasp 35 is folded after selecting the innermost groove 29 of the four grooves 29 and adjusting the length, and it can be seen that engaging pin 27 is pressed into the selected groove 29 by pressing portion 23 at the adjusted position.

[0022] 8, the thickness t from the center of the through hole 28 of the adjusting piece 22 to the top surface of the adjusting piece 22 is set to be approximately the same as the distance from the center of the engaging pin 27 to the back surface of the cover member 30 when the engaging pin 27 is engaged with the groove 29. In other words, when the adjusting piece 22 is stored in the cover member 30, the top surface of the adjusting piece 22, which is the surface facing the cover member 30, is set to abut against the cover member 30. As a result, when the clasp 35 is in the folded state, the top surface of the adjusting piece 22 acts as a stopper, preventing the engaging pin 27 from coming out of the groove 29.

[0023] Fig. 9 is a perspective view of the band with the clasp at the center, and Fig. 10 is a plan view of the band with the clasp at the center. FIG. 9 is a perspective view of the band 100, with the clasp 35 at the center. As shown in FIG. 9, a notch 36 is provided in the side wall 30a of the cover member 30. More specifically, the notch 36 is provided in the side wall 30a on the first band 10 side. A similar notch 36 is provided in the side wall 30b. The length of the notch 36 is approximately the same as the adjustment length provided by the four grooves 29, and in a preferred example, is set slightly longer than the width of the end link 2b of the first band 10. The length of the end link 2b in the longitudinal direction of the cover member 30 is defined as the width of the end link 2b.

[0024] The length L1 of the end piece 2b is set to be approximately the same as the width in the short side direction of the cover member 30. The length L2 of the end piece 2c of the second band 15 is also set to be approximately the same as the width in the short side direction of the cover member 30. 9 and 10 show the appearance of band 100 when the band length adjustment is set to the longest of four stages. When band 100 is viewed from above as shown in Fig. 10, there are no steps on the side surfaces of first band 10, cover member 30, and second band 15, creating a continuous outline. Also, as shown in Fig. 3, even when the band length adjustment is set to the shortest, end piece 2b of first band 10 fits neatly into notch 36, creating a continuous appearance in plan view with no steps on the side surfaces, similar to Fig. 10.

[0025] In other words, the first band 10 is composed of a plurality of pieces 2 including the end piece 2b, the width of the cover member 30 in the short direction is approximately the same as the length L1 of the end piece 2b, and cutout portions 36 are provided in the two side walls 30a, 30b on the first band 10 side of the cover member 30.

[0026] In other words, the band length adjustment mechanism of the clasp portion 35 including the adjustment portion 50 is configured such that the adjustment piece 22 is rotated about the engagement pin 27 as an axis so that the adjustment piece 22 is approximately perpendicular to the cover member 30, and the adjustment piece 22 is pushed toward the cover member 30, thereby contracting the spring 26 and disengaging the engagement pin 27 from the groove 29. When the engagement pin 27 is disengaged from the groove 29, the engagement pin 27 is moved in the longitudinal direction of the cover member 30 and the adjustment piece 22 is released at the desired band length, and the restoring force of the spring 26 causes the adjustment piece 22 to move away from the cover member 30, causing the engagement pin 27 to engage with the groove 29 corresponding to the desired band length.

[0027] As described above, the band 100 of this embodiment can provide the following effects. The band 100 comprises a first band 10 attached to one end of the watch 150 body, a second band 15 attached to the other end of the watch 150, and a clasp 35 connecting the first band 10 and the second band 15. The clasp 35 includes a cover member 30 and an adjustment unit 50. The adjustment unit 50 is arranged along the inside of the two side walls 30a, 30b of the cover member 30 in the longitudinal direction of the cover member 30, and has a plurality of fasteners for adjusting the length. The device comprises a pair of rail portions 20, 21 each having a groove 29, an adjustment piece 22 having one end connected to the end of the first band 10, a pressing portion 23 arranged on the inner bottom surface of the cover member 30 and including a spring 26 as an elastic member, and an engagement pin 27 inserted into the other end of the adjustment piece 22 and capable of engaging with the groove 29 of the rail portions 20, 21, and when the engagement pin 27 is engaged with the groove 29, the pressing portion 23 presses the engagement pin 27 against the rail portions 20, 21.

[0028] With this configuration, when changing the length of band 100, adjusting piece 22 is raised and pressing portion 23 is depressed with adjusting piece 22, causing engagement pin 27 to disengage from groove 29 and move to another groove 29. Furthermore, the length can be adjusted over a wide range, with four levels of adjustment. Unlike conventional bands, which require the cover member and band to be engaged when adjusting the length because the cover member and band are separate, length adjustment can be performed simply by raising adjusting piece 22 and pressing it in while cover member 30 and first band 10 are connected. Therefore, it is possible to provide a band 100 that has a sufficient range of length adjustment and is easy to use, and a timepiece 150 that allows for easy band length adjustment.

[0029] The pressing portion 23 also includes a lid body 25 that abuts the bottom surface of the cover member 30, a pressing case 24 that pairs with the lid body 25, and a spring 26 as an elastic member that is arranged between the lid body 25 and the pressing case 24, and the pressing case 24 has a through hole 8 along the short direction of the cover member 30, the adjustment piece 22 has a storage section 37 that stores the pressing case 24, and the engagement pin 27 is inserted through the through holes 8, 28 of the adjustment piece 22 and the pressing case 24 when the pressing case 24 is set in the storage section 37.

[0030] This allows the pressing portion 23 to be configured compactly with a simple configuration in which the spring 26 is provided between the pressing case 24 and the lid body 25. Furthermore, since the pressing portion 23 is stored in the storage portion 37 of the adjustment piece 22, the configuration of the adjustment portion 50 is also compact and can be configured to a size that can be stored inside the cover member 30. Therefore, the configuration of the clasp 35 including the cover member 30 can be made compact, and the band 100 can be made easy to use.

[0031] In addition, the thickness of the adjustment piece 22 is set to be approximately the same as the height of the side walls 30a, 30b of the cover member 30, and when the adjustment piece 22 is stored in the cover member 30, the upper surface of the adjustment piece 22, which is the surface facing the cover member 30, abuts against the cover member 30.

[0032] With this, when the clasp 35 is folded, the upper surface of the adjustment piece 22 acts as a stopper, preventing the engagement pin 27 from coming out of the groove 29. In other words, unintentional length adjustment can be prevented. Therefore, it is possible to provide a band 100 that is easy to use.

[0033] In addition, the adjustment piece 22 is connected to the end piece 2b of the first band 10 via the connecting piece 11, and the first band 10 is composed of a plurality of pieces 2 including the end piece 2b, and the width in the short direction of the cover member 30 is approximately the same as the length L1 of the end piece 2b, and cutout portions 36 are provided in the two side walls 30a, 30b on the first band 10 side of the cover member 30.

[0034] As a result, when the connection portion between the cover member 30 and the first band 10 is observed from the outside, the widths of the cover member 30 and the first band 10 are approximately the same regardless of the length adjustment, resulting in a continuous appearance with no steps on the sides. Therefore, it is possible to provide a band 100 with excellent aesthetics.

[0035] The rail portions 20 and 21 each have four grooves 29. This allows for four-stage length adjustment, unlike conventional technology which only had two stages of adjustment. Therefore, it is possible to provide a band 100 with a sufficient length adjustment range.

[0036] The elastic member is a spring 26 made of a conical spring. Compared to cylindrical springs and leaf springs, conical springs have a shorter stroke for achieving the same load, are more durable, and have a smaller volume when compressed, allowing the pressing portion 23 to be configured more compactly. Therefore, a small, easy-to-use band 100 can be provided.

[0037] Embodiment 2 ***Different configurations of the pressing part*** Fig. 11 is an exploded perspective view of the pressing part according to embodiment 2, and corresponds to Fig. 4. Fig. 12 is a side cross-sectional view of the main part showing the state of the pressing part when deployed, and corresponds to Fig. 5. In the above embodiment, when the band 100 is unfolded, the adjusting piece 22 may stand up as shown in Figure 5, but a stand-up prevention mechanism may be provided. More specifically, in the adjustment unit 80 of this embodiment, a stand-up prevention mechanism is provided in the adjusting piece 72 and the pressing portion 73, thereby preventing the adjusting piece 72 from standing up when the band 100 is unfolded.

[0038] 11, the adjustment unit 80 is composed of a pair of rail portions 20, 21, an adjustment piece 72, a pressing portion 73, an engagement pin 27, etc. The adjustment unit 80 of this embodiment differs from embodiment 1 in the configurations of the adjustment piece 72 and the pressing portion 73. Hereinafter, the same parts as those in the above embodiment will be given the same reference numerals, and duplicated explanations will be omitted. The adjusting piece 72 differs from the adjusting piece 22 of the first embodiment in the configuration on the pressing portion 73 side. Specifically, it has two branched protrusions 72b and 72c on the opposite side of the protrusion 22a, but the portion that comes into contact with the pressing portion 73 is lowered by one step. The lowered portion of the protrusions 72b and 72c is referred to as a first surface 76. The protrusions 72b and 72c have through holes 28 formed therein.

[0039] 13 and 14 are exploded perspective views of the pressing case and the cover, in which the spring 26 is omitted. The pressing portion 73 is composed of a pressing case 74, a lid 75, two springs 26, and the like. As shown in FIG. 13, the pressing case 74 has a storage section 74a for storing two springs 26 and a portion of the lid 75. An elongated hole 74b, which is an oval guide hole, is formed in the storage section 74a. A bottom surface 65, which is one step lower than the base portion of the pressing case 74, is provided on the back side of the storage section 74a, as shown in FIG. 14. A groove 78 that engages with the engagement pin 27 is provided in the bottom surface 65. The island-shaped protrusion on which the bottom surface 65 is provided is stored in the storage section 47 between the two protrusions 72b, 72c of the adjusting piece 72 (FIG. 11). Second surfaces 66, which are one step lower than the bottom surface 65, are provided on both sides of the bottom surface 65. The two second surfaces 66 correspond to the two first surfaces 76 of the adjusting piece 72 (FIG. 11).

[0040] As shown in FIG. 14 , the cover 75 has two mounting portions 77 for mounting the two springs 26, and a shaft 75a is provided between the two mounting portions 77. The shaft 75a is a protrusion extending from the base of the cover 75 and has an elliptical planar shape. An elongated hole 68 through which the engagement pin 27 is inserted is provided on the side of the shaft 75a. The shaft 75a is inserted into the elongated hole 74b of the pressing case 74, and in this inserted state, the engagement pin 27 is inserted into the elongated hole 68 of the shaft 75a. The length of the elongated hole 68 is set to a length that allows the spring 26 to expand and contract when the engagement pin 27 is inserted. The shaft 75a serves as a guide member that smooths the movement of the pressing case 74 when the pressing case 74 moves up and down in response to the expansion and contraction of the spring 26.

[0041] With two springs 26 set on the two mounting portions 77 of lid body 75, lid body 75 and pressing case 74 are combined to form pressing portion 73, and then pressing portion 73 is set in storage portion 47 of adjusting piece 72, as shown in Fig. 11. Then, with pressing portion 73 housed in storage portion 47 of adjusting piece 72, engaging pin 27 is inserted through through hole 28 of protrusion 72b, elongated hole 68 of shaft 75a, and through hole 28 of protrusion 72c, thereby integrating pressing portion 73 and adjusting piece 72.

[0042] FIG. 12 is a side view of the main part of the band 100 equipped with the adjustment portion 80 when it is deployed. 12, even when deployed, the adjusting piece 72 does not stand up but remains housed within the cover member 30. This is because the spring 26 biases the cover body 75 and the pressing case 74 in the direction separating them, causing the second surface 66 serving as the pressure applying portion of the pressing case 74 to press the first surfaces 76 of the protrusions 72b and 72c of the adjusting piece 72, and by the principle of leverage, the end of the adjusting piece 72 on the connecting piece 11 side is pressed toward the cover member 30. In other words, the second surface 66 serving as the pressure applying portion of the pressing case 74, the first surface 76 of the adjusting piece 72, and the related mechanisms function as a mechanism for preventing the adjusting piece 72 from standing up.

[0043] In other words, the cover body 75 is provided with a shaft 75a having an elongated hole 68, the pressing case 74 is provided with a second surface 66 as a pressure section that presses the adjustment piece 72 against the rail sections 20, 21, and an elongated hole 74b through which the shaft 75a is inserted, the adjustment piece 72 has a storage section 47 that stores a portion of the pressing case 74 and a through hole 28 provided in the short direction of the cover member 30, and the engagement pin 27 is inserted through the through hole 28 of the adjustment piece 72 and the elongated hole 68 of the shaft 75a when a portion of the pressing case 74 is set in the storage section 47.

[0044] ***How ​​to adjust the band length*** 15 and 16 are side cross-sectional views of the main part showing the state during length adjustment. 15, when adjusting the length of band 100, first band 10 is pulled downwards on cover member 30 in the unfolded state. When the pulling force exceeds the pressing force of pressing portion 73, the tips of protrusions 72b and 72c of adjustment piece 72 press down on second surface 66 of pressing case 74 in a prying manner, causing adjustment piece 72 to stand up. When the adjusting piece 72 is pushed toward the cover member 30 while it is in the upright state, the two springs 26 inside the pressing portion 73 are compressed, and the engaging pin 27 is released from the groove 29, becoming slidable, as shown in Fig. 16. Here, with the adjusting piece 72 pushed in, when the engaging pin 27 is moved to the position of the groove 29 at the desired length from among the four grooves 29 and the adjusting piece 72 is released, the engaging pin 27 fits into that groove 29.

[0045] As described above, the band 100 including the adjustment section 80 of this embodiment can provide the following effects. In the band 100, the pressing portion 73 comprises a lid body 75 that abuts against the bottom surface of the cover member 30, a pressing case 74 that is paired with the lid body 75, and a spring 26 as an elastic member that is arranged between the lid body 75 and the pressing case 74, the lid body 75 is provided with a shaft 75a having an elongated hole 68, the pressing case 74 is provided with a second surface 66 that serves as a pressure portion that presses the adjustment piece 72 against the rail portions 20, 21, and an elongated hole 74b through which the shaft 75a is inserted, the adjustment piece 72 has a storage portion 47 that stores a portion of the pressing case 74 and a through hole 28 that is provided along the short direction of the cover member 30, and the engagement pin 27 is inserted through the through hole 28 of the adjustment piece 72 and the elongated hole 68 of the shaft 75a when a portion of the pressing case 74 is set in the storage portion 47.

[0046] According to this, the pressing part 73 has a simple and compact configuration in which two springs 26 are provided between the lid body 75 and the pressing case 74. Furthermore, since a portion of the pressing case 74 is stored in the storage part 47 of the adjusting piece 72, the configuration of the adjusting part 80 is also compact, and it can be configured to a size that can be stored inside the cover member 30. Furthermore, the pressing case 74 has a second surface 66 that functions as a pressure applying portion. The second surface 66 presses against the first surface 76 of the adjusting piece 72, thereby pressing the end of the adjusting piece 72 on the connecting piece 11 side against the cover member 30 using the principle of leverage. In this way, the second surface 66 as a pressure applying portion functions as a locking mechanism, preventing the adjusting piece 72 from sagging when the clasp 35 is opened or closed. In addition, when the clasp 35 is unfolded and worn on the wrist, the band opening becomes larger, making it easier to wear. Therefore, a band that is easy to use can be provided. Furthermore, by inserting the engaging pin 27, the cover 75, the pressing case 74, and the adjusting piece 72 can be integrated, which improves assembly during manufacturing. [Explanation of symbols]

[0047] 2...piece, 2b...end piece, 4...through hole, 7...mounting portion, 8...through hole, 10...first band, 11...connecting piece, 15...second band, 20, 21...rail portion, 20a...through hole, 20b...fixing hole, 21a...through hole, 21b...fixing hole, 22...adjusting piece, 22a...projection portion, 22b...projection portion, 22c...projection portion, 23...pressing portion, 24...pressing case, 24a...storage portion, 25...lid body, 26...spring, 27...engagement pin, 28...through hole, 29...groove, 30...cover member, 30a... Side wall, 30b...side wall, 31...middle plate, 32...bottom plate, 33...button, 35...clasp portion, 36...notch portion, 37...storage portion, 41...latch pin, 47...storage portion, 50...adjustment portion, 66...second surface, 68...long hole, 72...adjustment piece, 72b...projection portion, 72c...projection portion, 73...pressing portion, 74...pressing case, 74a...storage portion, 74b...long hole, 75...lid body, 75a...shaft, 76...first surface, 77...mounting portion, 78...groove, 80...adjustment portion, 100...band, 150...watch.

Claims

1. a first band attached to one end of the watch body; a second band attached to the other end of the watch body; a clasp portion connecting the first band and the second band, The clasp includes a cover member and an adjustment portion, The adjustment unit The cover member is disposed along the inner sides of the two side walls in the longitudinal direction of the cover member. a pair of rail portions each having a plurality of grooves for adjusting the length; an adjustment piece having one end connected to the end of the first band; a pressing portion disposed on an inner bottom surface of the cover member and including an elastic member; an engagement pin that is inserted into the other end of the adjustment piece and is engageable with the groove of the rail portion; picture, When the engagement pin is engaged with the groove, the pressing portion presses the engagement pin against the Press against the rail, band.

2. The pressing portion is a lid body that abuts against the bottom surface of the cover member; The lid body and a pair of pressing cases; the elastic member is disposed between the cover and the pressing case, The pressing case has a through hole formed along a short-side direction of the cover member, The adjustment piece includes a storage portion for storing the pressing case, The engagement pin is in contact with the adjustment piece when the pressing case is set in the storage section. and inserting the pressing case through the through hole. The band according to claim 1 .

3. The pressing portion is a lid body that abuts against the bottom surface of the cover member; The lid body and a pair of pressing cases; the elastic member is disposed between the cover and the pressing case, The lid is provided with a protrusion having an elongated hole, The pressing case has a pressure section that presses the adjustment piece toward the rail section, and a projection a guide hole through which the pin is inserted, The adjustment piece has a storage portion that stores a part of the pressing case and a short-side direction of the cover member. and a through hole provided in the The engagement pin is configured to be engaged with the adjusting pin when a part of the pressing case is set in the storage portion. The through hole of the bridge is inserted into the elongated hole of the protrusion. The band according to claim 1 .

4. When the adjustment piece is housed in the cover member, an upper surface of the adjustment piece, which is the surface facing the cover member, abuts against the cover member; The band according to any one of claims 1 to 3.

5. the adjusting piece is connected to the end piece of the first band via a connecting piece, the first band is made up of a plurality of links including the end link, The width of the cover member in the short-side direction is approximately the same as the length of the end piece, The two side walls of the cover member on the first band side are provided with notches. It is being A band according to claim 2 or 3.

6. The groove portion is provided in four locations in the rail portion. A band according to any one of claims 1 to 5.

7. The elastic member is a conical spring. A band according to any one of claims 1 to 6.

8. A band according to any one of claims 1 to 7, clock.

9. a first band attached to one end of the watch body; a second band attached to the other end of the watch body; a clasp portion connecting the first band and the second band, The clasp includes a cover member and an adjustment portion, The adjustment unit The cover member is disposed along the inner sides of the two side walls in the longitudinal direction of the cover member. a pair of rail portions each having a plurality of grooves for adjusting the length; an adjustment piece having one end connected to the end of the first band; a pressing portion disposed on an inner bottom surface of the cover member and including an elastic member; an engagement pin that is inserted into the other end of the adjustment piece and is engageable with the groove of the rail portion; picture, The adjustment piece is attached to the engagement pin so that the adjustment piece is at a substantially right angle to the cover member. The adjusting piece is rotated around the center pin as an axis, and the adjusting piece is pushed in the direction of the cover member of the clasp portion. Therefore, the elastic member is contracted, and the engaging pin is disengaged from the groove. and With the engagement pin disengaged from the groove, the engagement pin is moved in the longitudinal direction of the cover member. When the adjustment piece is moved and released at the desired band length, the adjustment piece moves to the elastic member. The force causes the buckle portion to move in a direction away from the cover member, and the engagement pin configured to engage the groove corresponding to the desired band length. Band length adjustment mechanism.

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