Band, timepiece, and band length adjustment mechanism

Abstract

To provide a band having high sliding durability for length adjustment and excellent aesthetic appearance.SOLUTION: The band comprises a first band, a second band that pairs with the first band, and a buckle that connects the first band and the second band. The buckle includes a cover member and an adjustment portion. The adjustment portion is arranged along the inside of the two side walls of the cover member in the longitudinal direction of the cover member and comprises a pair of rail portions with multiple grooves for adjusting the length, a pressing portion including an elastic member, a connecting portion whose one end is connected to the end of the first band, and an engaging portion that is provided on the pressing portion and can engage with the grooves of the rail portions. By pressing the pressing portion toward the cover member, the engaging portion is configured to be able to select the grooves of the rail portions, and the portion of the pressing portion or the connecting portion that faces the inner surface of the cover member and slides against the inner surface of the cover member is made of resin.SELECTED DRAWING: Figure 12

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 with length adjustment mechanisms are known. For example, Patent Document 1 discloses a band with a clasp including an adjustment piece connected to the end of a first band and a pressing part with an engagement pin for length adjustment. According to this document, when adjusting the length, the adjustment piece is raised, and the pressing part with the engagement pin is pressed and slid against the inner surface of the cover member, thereby selecting the groove into which the engagement pin fits and adjusting the length. It also states that each part is made of hard metal such as stainless steel or titanium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-113263 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is room for improvement in the band of Patent Document 1. Specifically, when adjusting the length, it is necessary to slide the pressing part against the inner surface of the cover member while pressing it, which may cause the metal parts to rub against each other and wear out. Furthermore, there are issues such as a deterioration in sliding ability due to wear and damage to the appearance. In other words, there has been a demand for a band, a watch, and a band length adjustment mechanism that have high sliding durability during length adjustment and an excellent aesthetic appearance. [Means for solving the problem]

[0005] A band according to one embodiment 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 portion, the adjustment portion being arranged along the inside of the two side walls of the cover member in the longitudinal direction of the cover member and comprising a pair of rail portions having multiple grooves for adjusting the length, a pressing portion including an elastic member, a connecting portion having one end connected to the end of the first band, and an engaging portion provided on the pressing portion and capable of engaging with the grooves in the rail portions, the engaging portion being configured to be able to select the grooves in the rail portions by pressing the pressing portion toward the cover member, and the portion of the pressing portion or the connecting portion that faces the inner surface of the cover member and slides against the inner surface of the cover member is made of resin.

[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 connecting the first band and the second band, the clasp including a cover member and an adjustment unit, the adjustment unit being arranged along the inside of the two side walls of the cover member in the longitudinal direction of the cover member and comprising a pair of rails with multiple grooves for adjusting the length, a pressing unit including an elastic member, a connecting unit having one end connected to the end of the first band, and an engaging unit provided on the pressing unit and capable of engaging with the grooves in the rails, the engaging unit being configured to be able to select the grooves in the rails by pressing the pressing unit against the inner surface of the cover member, and the pressing unit or the portion of the connecting unit that faces the inner surface of the cover member and slides against the inner surface of the cover member is made of resin. [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. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 10 is a cross-sectional side view of the main part showing the state of the pressing part when deployed. [Figure 9] FIG. 10 is a cross-sectional side view of the main part showing a state during length adjustment. [Figure 10] FIG. 10 is a cross-sectional side view of the main part showing a state during length adjustment. [Figure 11] FIG. 10 is a perspective view of the inside of the cover member including the adjustment portion. [Figure 12] FIG. 10 is a perspective view of a lid according to a second embodiment. [Figure 13] FIG. [Figure 14] FIG. 11 is a plan view of a cover member according to a third embodiment. [Figure 15] FIG. 15 is a cross-sectional view taken along the line bb in FIG. 14 . [Figure 16] FIG. 10 is an exploded perspective view of an adjustment unit according to a fourth embodiment. [Figure 17] FIG. 10 is a transparent perspective view of the adjustment part with the clasp part deployed. [Figure 18] FIG. [Figure 19] FIG. 10 is a cross-sectional side view of the main part showing a state during length adjustment. [Figure 20] FIG. 10 is an exploded perspective view of a buckle according to a fifth embodiment. [Figure 21] FIG. [Figure 22] FIG. 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 80 in the cover member 30 via a link piece 11. The adjustment unit 80 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 link 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. This allows the clasp 35 to be switched between a state in which the middle plate 31 and the lower plate 32 are folded into 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 wear on the arm. The cover member 30 has a substantially rectangular shape in plan view, with its longitudinal direction aligned with the extension direction of the first band 10. The width of the cover member 30 in the short direction is substantially the same as the width of the first band 10. When folded, the middle plate 31 and the lower plate 32 are curved in the same manner as the cover member 30, following the back surface of the cover member 30.

[0013] In a preferred embodiment, each part of the band 100 is made of titanium. However, the material is not limited to titanium, and any metal that is hard and has a good texture may be used, for example, stainless steel. In other words, the band 100 comprises a first band 10 attached to one end of the body of the watch 150, a second band 15 attached to the other end of the body, and a clasp 35 connecting the first band 10 and the second band 15, and the clasp 35 includes a cover member 30 and an adjustment unit 80.

[0014] ***Band length adjustment mechanism*** Fig. 3 is a transparent perspective view of the adjustment part when the clasp is folded. Fig. 4 is an exploded perspective view of the adjustment part. Figs. 5 and 6 are exploded perspective views of the pressing case and the cover. Note that the spring is not shown in Figs. 5 and 6. FIG. 3 is a see-through perspective view of the clasp 35 in the folded state, and the adjustment portion 80 inside the cover member 30 is observed through the view. Here, the configuration of the adjustment portion 80 will be described with reference to the drawings. The adjustment portion 80 and the clasp portion 35 including the cover member 30 are also referred to as a band length adjustment mechanism.

[0015] The adjustment portion 80 is composed of a pair of rail portions 20, 21, an adjustment piece 72, a pressing portion 73, an engagement pin 27 as an engagement portion, 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.

[0016] The adjusting piece 72 is a connecting part and includes a protrusion 22a that protrudes toward the first band 10, and protrusions 72b and 72c that branch into two 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 72 is disposed between the rail portion 20 and the rail portion 21. The connecting piece 11 that connects the adjusting piece 72 and the end piece 2b of the first band 10 is also provided to have approximately the same size as the adjusting piece 72, and is disposed between the rail portion 20 and the rail portion 21. In the protrusions 72b and 72c, the portions that come into contact with the pressing portion 73 are formed one step lower, and the one step lowered portions are referred to as first surfaces 76. A through hole 28 is formed in the protrusions 72b and 72c.

[0017] As shown in FIG. 4, the pressing portion 73 is composed of a pressing case 74, a lid 75, two springs 26, and the like. The pressing case 74 has a storage section 74a for storing two springs 26 and part of the lid body 75. The storage section 74a has an elongated hole 74b, which is an oval guide hole. 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. 6, the bottom surface 65 is provided with a groove 78 that engages with the engagement pin 27 (Fig. 4). The island-shaped protrusion on which the bottom surface 65 is provided is housed in the housing portion 47 (Fig. 4) between the two protrusions 72b, 72c of the adjustment piece 72 (Fig. 4). Second surfaces 66 that 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 adjustment piece 72 (Fig. 4).

[0018] As shown in Figure 4, 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 73 and adjustment unit 80 to be configured more compactly.

[0019] As shown in FIG. 6, the cover 75 has two mounting portions 77 for mounting the two springs 26 thereon, and a shaft 75a is provided between the two mounting portions 77. The shaft 75a is a protrusion that stands upright from the base of the cover 75, and has an oval shape in plan view. 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 accordance with the expansion and contraction of the spring 26.

[0020] With the two springs 26 set on the two mounting portions 77 of the lid body 75, the lid body 75 and the pressing case 74 are combined to form the pressing portion 73, and then the pressing portion 73 is set in the storage portion 47 of the adjustment piece 72 as shown in Figure 4. Then, with the pressing portion 73 housed in the storage portion 47 of the adjustment piece 72, the engagement pin 27 is inserted through the through hole 28 of the protrusion 72b, the long hole 68 of the shaft 75a, and the through hole 28 of the protrusion 72c, thereby integrating the pressing portion 73 and the adjustment piece 72. In other words, the adjustment unit 80 is arranged along the inside of the two side walls of the cover member 30 in the longitudinal direction of the cover member, and comprises a pair of rail portions 20, 21 having multiple grooves 29 for adjusting the length, a pressing unit 73 including an elastic member, an adjustment piece 72 as a connecting portion having one end connected to the end of the first band 10, and an engagement pin 27 as an engaging portion provided on the pressing unit 73 and capable of engaging with the grooves of the rail portions 20, 21.

[0021] Fig. 7 is a transparent perspective view of the pressing portion, and Fig. 8 is a side cross-sectional view of the main portion showing the state of the pressing portion when deployed. FIG. 7 shows how the pressing portion 73 presses the engagement pin 27. The bottom surface of the storage portion 74a is pressed down by the restoring force of the two springs 26, pressing the engagement pin 27 engaged in the groove 78 in the bottom surface 65 (FIG. 6). 8, 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.

[0022] ***How ​​to adjust the band length*** 9 and 10 are side cross-sectional views of the main part showing the state during length adjustment. 9, 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.

[0023] When the adjusting piece 72 is pushed toward the cover member 30 while it is in an upright position, 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. 10 . With the adjusting piece 72 pushed in, the engaging pin 27 is moved to a groove 29 among the four grooves 29 at the desired length, and the adjusting piece 72 is then released, whereupon the engaging pin 27 engages with that groove 29. In other words, to adjust the length of the band, the adjusting piece 72 is raised with the clasp 35 unfolded, and then pushed toward the cover member 30. In other words, the engaging pin 27 can be slid toward the cover member 30 by pressing the pressing portion 73 toward the cover member 30, allowing it to select one of the grooves 29 in the rail portions 20 and 21.

[0024] In other words, the pressing portion 73 faces the inner surface of the cover member 30, and the pressing portion 73 includes a lid body 75 that abuts against the inner surface of the cover member 30, a pressing case 74 that pairs 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 engaging portion is an engaging pin 27, and the connecting portion is an adjusting piece 72 that is connected to the pressing portion 73 by the engaging pin 27, and during sliding, the adjusting piece 72 stands upright relative to the cover member 30 with the engaging pin 27 as the axis of rotation, and the adjusting piece 72 presses the pressing portion 73 toward the cover member 30. Note that the pressing case 74 is designed so that the corners of the pressing case 74 do not abut against the inner surface of the cover member 30 when the pressing portion 73 is pressed.

[0025] ***Sliding behavior when adjusting length*** When adjusting the length of the band, the pressing portion 73 is pressed against the inner surface of the cover member 30 while sliding. At this time, it is the lid 75 of the pressing portion 73 that abuts against the inner surface of the cover member 30. In a preferred example, the material of the cover member 30 is titanium. If the material of the lid 75 were also titanium, the sliding between titanium pieces would have a large frictional force, resulting in poor sliding properties and wear, leaving sliding marks on the inner surface of the cover member 30. This phenomenon is not limited to titanium, and occurs similarly with hard metals such as stainless steel. In other words, there is a risk that the metal parts will rub against each other and wear, which could lead to problems such as poor sliding properties due to wear and damage to the appearance.

[0026] In contrast, in this embodiment, the lid 75 is made of resin. In a preferred example, polyacetal resin (POM) is used. Note that the material is not limited to polyacetal resin, and any resin with good sliding properties may be used, such as MC nylon, ultra-high molecular weight polyethylene, or Teflon (registered trademark) resin. In other words, the lid 75, which is the portion of the pressing portion 73 facing the inner surface of the cover member 30 that slides against the inner surface of the cover member 30, is made of resin. With the above-described configuration, the friction between the lid 75 and the inner surface of the cover member 30 is small, providing excellent sliding properties, and therefore no sliding marks are left on the inner surface of the cover member 30. In other words, a band length adjustment mechanism with high sliding durability during length adjustment and excellent aesthetic appearance can be realized. Furthermore, the lid 75 can be easily manufactured by injection molding.

[0027] FIG. 11 is a perspective view of the inside of the cover member including the adjustment portion. In a preferred example, a colored resin is used for the lid 75. As shown in FIG. 11, the end face of the shaft 75a of the lid 75 is exposed at the center of the inside of the cover member 30. For example, if a red resin is used for the lid 75, an oval red accent decoration can be applied to the inside of the cover member 30. The color tone is not limited to red and can be selected appropriately depending on the design.

[0028] As described above, the band 100, watch 150, and band length adjustment mechanism of this embodiment can provide the following effects. The band 100 comprises a first band 10 attached to one end of the watch body 150, a second band 15 attached to the other end of the body, 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 80. The adjustment unit 80 is arranged along the inside of the two side walls of the cover member 30 in the longitudinal direction of the cover member, and includes a pair of rails 20, 21 with multiple grooves 29 for adjusting the length, and an elastic member. The cover member 30 includes a pressing portion 73, an adjustment piece 72 as a connecting portion having one end connected to the end of the first band 10, and an engagement pin 27 as an engaging portion provided on the pressing portion 73 and capable of engaging with the grooves of the rail portions 20 and 21, and by pressing the pressing portion 73 toward the cover member 30, the engagement pin 27 is capable of selecting the grooves 29 of the rail portions 20 and 21, and a lid body 75, which is the portion of the pressing portion 73 facing the inner surface of the cover member 30 and which slides against the inner surface of the cover member 30, is made of resin.

[0029] According to this, since the lid body 75 of the pressing part 73 that slides against the inner surface of the cover member 30 during length adjustment is made of resin, the frictional force between it and the metal cover member 30 is small, and it has excellent sliding properties, so it is possible to suppress wear between the members. Therefore, no sliding marks are left on the inner surface of the cover member 30, and damage to the appearance can be suppressed. Therefore, it is possible to provide a band 100 that has high sliding durability during length adjustment and excellent aesthetic appearance.

[0030] In addition, a pressing portion 73 faces the inner surface of the cover member 30, and the pressing portion 73 comprises a lid body 75 that abuts the inner surface of the cover member 30, a pressing case 74 that pairs 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 engagement portion is an engagement pin 27, and the connecting portion is an adjustment piece 72 that is connected to the pressing portion 73 by the engagement pin 27, and when sliding, the adjustment piece 72 stands upright relative to the cover member 30 with the engagement pin 27 as the rotation axis, and the adjustment piece 72 presses the pressing portion 73 toward the cover member 30.

[0031] This is convenient because the length can be adjusted by raising the adjustment piece 72 and pressing the pressing part 73 against the inner surface of the cover member 30. Furthermore, the pressing part 73 and the adjustment piece 72 are connected by an engagement pin, resulting in a compact configuration. Therefore, it is possible to provide a band 100 that is compact and has a band length adjustment mechanism that allows for easy length adjustment.

[0032] The lid 75 is made of resin. This allows the lid 75 to be easily manufactured by injection molding or the like.

[0033] The band length adjustment mechanism comprises a first band 10 attached to one end of the watch body 150, a second band 15 attached to the other end of the body, 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 80. The adjustment unit 80 is arranged along the inside of the two side walls of the cover member 30 in the longitudinal direction of the cover member, and includes a pair of rails 20, 21 with multiple grooves 29 for adjusting the length, and an elastic member and an adjustment piece 72 as a connecting part having one end connected to the end of the first band 10, and an engagement pin 27 as an engaging part provided on the pressing part 73 and capable of engaging with the grooves of the rail parts 20 and 21, and by pressing the pressing part 73 towards the cover member 30, the engagement pin 27 is provided so as to be able to select the grooves 29 of the rail parts 20 and 21, and a lid body 75, which is the part of the pressing part 73 facing the inner surface of the cover member 30 and which slides against the inner surface of the cover member 30, is made of resin. This makes it possible to provide a band length adjustment mechanism that has high sliding durability during length adjustment and excellent aesthetic appearance.

[0034] Embodiment 2 ***Different lid configurations*** Fig. 12 is a perspective view of the lid according to the second embodiment, and corresponds to Fig. 5. Fig. 13 is a perspective view of the lid, and corresponds to Fig. 6. In the above embodiment, the lid body 75 is described as being made of resin, but this is not limited to this, and it is sufficient that the portion that abuts against the inner surface of the cover member 30 is made of resin. Hereinafter, the same parts as in the above embodiment will be given the same reference numerals, and duplicated explanations will be omitted.

[0035] 12 is made up of two parts: a main body 83 and an abutment part 84. The main body 83 is the main body part of the lid 85, and includes the shaft 75a and the mounting part 77 (FIG. 13). The abutment part 84 is a plate-like member that includes the upper surface of the lid 85, and is the part that abuts against the inner surface of the cover member 30. The main body 83 is made of a metal such as titanium, and the contact portion 84 is made of a resin similar to the above embodiment. 13, the abutment portion 84 has mating projections 84b at positions corresponding to the two mounting portions 77. The main body portion 83 has through holes at positions corresponding to the projections 84b. The abutment portion 84 is mated with the main body portion 83 by fitting the two projections 84b into the through holes. The lid body 85 in the mated state has the same shape as the lid body 75 of the first embodiment, and is incorporated into the pressing case 74 to form the pressing portion 73 . In other words, the lid body 85 has a two-body structure, consisting of a metal main body portion 83 and an abutment portion 84 attached to the main body portion 83 and abutting against the inner surface of the cover member 30, the abutment portion 84 being made of resin.

[0036] As described above, the band 100, watch 150, and band length adjustment mechanism of this embodiment can provide the following effects in addition to the effects of the above embodiment. The lid 85 has a two-piece structure and is made up of a main body 83 made of metal and a contact part 84 attached to the main body 83 and contacting the inner surface of the cover member 30, the contact part 84 being made of resin.

[0037] According to this, the main body 83 of the lid 85 is made of metal and has high rigidity, and the contact portion 84 is made of resin, so it has excellent sliding properties. Therefore, it is possible to provide a band 100, a timepiece 150, and a band length adjustment mechanism that are strong enough to withstand excessive pressure when adjusting the length, and that have high sliding durability.

[0038] Embodiment 3 ***Sliding resistance reduction structure*** Fig. 14 is a plan view of a cover member according to embodiment 3. Fig. 15 is a cross-sectional view taken along line bb in Fig. 14 . A structure for reducing sliding resistance may be provided on the sliding surface of the cover member 30 in the above embodiment with 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.

[0039] 14 is a plan view of the inner surface side of cover member 30, and uneven portion 39 is formed in the portion where pressing portion 73 slides between rail portion 20 and rail portion 21. Uneven portion 39 is a striped uneven line extending in the longitudinal direction of cover member 30. In other words, uneven portion 39 is a plurality of hairlines extending along the sliding direction. 15, a plurality of grooves having a size of 0.01 mm or more and 0.15 mm or less are formed at equal intervals in uneven portion 39. In other words, uneven portion 39 is provided along the sliding direction at the portion of the inner surface of cover member 30 where pressing portion 73 abuts against lid body 75.

[0040] As described above, the band 100, watch 150, and band length adjustment mechanism of this embodiment can provide the following effects in addition to the effects of the above embodiment. In the inner surface of the cover member 30 according to this embodiment, the pressing portion 73 has an uneven portion 39 formed along the sliding direction at a portion where the pressing portion 73 abuts against the lid body 75.

[0041] According to this, the sliding portion on the inner surface of the cover member 30 is provided with an uneven portion 39 which is a striped groove along the sliding direction of the lid body 75, thereby reducing the contact area during sliding and reducing sliding resistance. Therefore, it is possible to provide a band 100, a watch 150, and a band length adjustment mechanism that have higher sliding durability during length adjustment and an excellent aesthetic appearance. Note that the same effects can be obtained when using lid 85 instead of lid 75.

[0042] Embodiment 4 ***Different configurations of the pressing part*** Fig. 16 is an exploded perspective view of the adjustment part according to the fourth embodiment, and corresponds to Fig. 4. Fig. 17 is a see-through perspective view of the adjustment part with the clasp part deployed. In the above embodiment, the cover 75 has been described as having a shaft 75a, but this is not limited thereto and any configuration that can function as a pressing portion may be used, for example, a cover without a shaft may be used. Hereinafter, the same parts as in the above embodiment will be assigned the same reference numerals, and duplicated explanations will be omitted.

[0043] 16, the adjustment unit 50 of this embodiment is composed of a pair of rail portions 20, 21, an adjustment piece 22, a pressing portion 23, an engagement pin 27, etc. In other words, the adjustment unit 50 of this embodiment differs from the adjustment unit 80 in the configurations of the adjustment piece 22 and the pressing portion 23. Adjusting piece 22 has protrusion 22a protruding toward first band 10, and protrusions 22b and 22c branching into two on the opposite side of protrusion 22a. Protrusion 22a has a through-hole 4 for connecting to connecting piece 11. Adjusting piece 22 is disposed between rail portion 20 and rail portion 21. The space between protrusions 22b and 22c is a storage portion 37, and storage portion 37 houses pressing portion 23. Protrusions 22b and 22c each have a through-hole 28 through which engaging pin 27 is inserted.

[0044] 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. As in the above embodiment, the pressing case 24 is made of a metal such as titanium. The pressing case 24 is disposed with its long side 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 of the pressing case 24.

[0045] The lid body 25 is a member that serves as a lid for the pressing case 24, and is formed to a size that fits into the storage section 24a. The lid body 25 is made of the same resin as in the above embodiment, does not have a shaft, and is a simple plate-like member. The pressing portion 23 is configured by setting the cover body 25 in a state in which two springs 26 are housed side by side in the housing portion 24a of the pressing case 24. 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.

[0046] FIG. 17 is a see-through perspective view of the adjustment part 50 with the clasp part 35 unfolded, showing the adjustment piece 22 standing upright relative to the cover member 30. As shown in FIG. As shown in Figure 17, even when clasp 35 is deployed, engagement pin 27 is pressed into groove 29 by pressing portion 23, so that it is fixed in groove 29 at the shortest position among the four band lengths. 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. 17 with the clasp portion 35 unfolded.

[0047] ***How ​​to adjust the band length*** Fig. 18 is a side cross-sectional view of the main part when folded, and corresponds to Fig. 8. Fig. 19 is a side cross-sectional view of the main part showing the state when the length is adjusted, and corresponds to Fig. 10. As shown in Figure 19, 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 pushed in, engaging pin 27 is moved to the position of the groove 29 at the desired length from among the four grooves 29, and then adjusting piece 22 is released, whereby engaging pin 27 engages with that groove 29. Figure 18 shows the state in which the innermost groove 29 of the four grooves 29 is selected and the length is adjusted, and then buckle portion 35 is folded.

[0048] 18, 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. As a result, when the buckle 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.

[0049] As described above, the band 100, watch 150, and band length adjustment mechanism of this embodiment can provide the following effects. The band 100 comprises a first band 10 attached to one end of the watch body 150, a second band 15 attached to the other end of the body, 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 of the cover member 30 in the longitudinal direction of the cover member, and includes a pair of rails 20, 21 with multiple grooves 29 for adjusting the length, and an elastic member. The cover member 30 includes a pressing portion 23, an adjustment piece 22 as a connecting portion having one end connected to the end of the first band 10, and an engagement pin 27 as an engaging portion provided on the pressing portion 23 and capable of engaging with the grooves of the rail portions 20 and 21, and by pressing the pressing portion 23 toward the cover member 30, the engagement pin 27 is provided so as to be able to select the grooves 29 of the rail portions 20 and 21, and a lid body 25, which is the portion of the pressing portion 23 facing the inner surface of the cover member 30 and which slides against the inner surface of the cover member 30, is made of resin.

[0050] According to this, since the lid body 25 of the pressing part 23 that slides against the inner surface of the cover member 30 during length adjustment is made of resin, the frictional force between it and the metal cover member 30 is small, and it has excellent sliding properties, so it is possible to suppress wear between the members. Therefore, no sliding marks are left on the inner surface of the cover member 30, and damage to the appearance can be suppressed. Therefore, it is possible to provide a band 100, a timepiece 150, and a band length adjustment mechanism that have high sliding durability during length adjustment and an excellent aesthetic appearance.

[0051] Embodiment 5 ***Different configurations of connecting and pressing parts*** Fig. 20 is an exploded perspective view of the buckle according to embodiment 5. Fig. 21 is an exploded perspective view of the adjustment part. Fig. 22 is a perspective view of the sliding part and the push button. In the above embodiment, when adjusting the length, the adjusting pieces 22, 72 as the connecting parts are raised and the pressing parts 23, 73 are pressed against the cover member 30, but this is not limited to this and any configuration that can function as a pressing part may be used, for example, a configuration in which the length is adjusted by pressing a push button. Hereinafter, the same parts as in the above embodiment will be assigned the same reference numerals and redundant explanations will be omitted.

[0052] As shown in FIGS. 20 and 21, the adjustment section 55 of this embodiment is made up of a pair of rail sections 20, 21, a slider 92 as a connecting section, a push button 93 as a pressing section, a leaf spring 96 as an elastic member, and the like. The sliding body 92 has a shape that is slightly smaller than the cover member 30, and one end thereof is connected to the first band 10, and the other end thereof has a push button 93. The sliding body 92 is fitted between the rail portions 20 and 21 of the cover member 30, and is provided so as to be able to slide on the inner surface. The push button 93 is a rectangular push button with its long sides aligned in the short direction of the cover member 30. A protrusion 97 is provided on each of the two short sides of the push button 93. The two protrusions 97 function as engagement parts. The push button 93 is made of a metal such as titanium, as in the above embodiment.

[0053] As shown in Fig. 21, the push button 93 is incorporated into the sliding body 92 via a leaf spring 96. As shown in Fig. 20, when the sliding body 92 is incorporated into the cover member 30, a pair of protrusions 97 are engaged with a pair of grooves 29 for adjusting the length of the rail portions 20, 21. At this time, the protrusions 97 are pressed against the grooves 29 by the biasing force of the leaf spring 96. When adjusting the length of the band, the push button 93 is pushed down toward the cover member 30, causing the slider 92 to press against the inner surface of the cover member 30 and slide, moving the protrusion 97 to the groove 29 at the desired length from among the multiple grooves 29, and then the push button 93 is released, causing the protrusion 97 to engage with that groove 29.

[0054] Fig. 22 is a perspective view of the sliding body 92 as seen from the cover member 30 side. In Fig. 22, the leaf spring is not shown. The sliding body 92 is composed of a main body 92b made of a metal such as titanium, and two protrusions 98 provided on the main body 92b. The two protrusions 98 are made of the same resin as in the above embodiment, and are arranged in a portion that abuts against the inner surface of the cover member 30. The protrusions 98 are rail-shaped protrusions that extend in the longitudinal direction of the cover member 30. Two protrusions 98 are provided spaced apart on the main body 92b. An engagement pin (not shown) is provided on the protrusions 98, and the engagement pin is fitted into an engagement hole (not shown) provided in the main body 92b.

[0055] When adjusting the length of the band, the two protrusions 98 come into contact with the inner surface of the cover member 30 and slide, causing the slider 92 to slide. In other words, the connecting portion faces the inner surface of the cover member 30, and the connecting portion is a sliding body 92 that fits between the pair of rail portions 20, 21. The pressing portion is a rectangular push button 93 having a long side in the short direction of the cover member 30. The engaging portion is a pair of protrusions 97 provided on the short sides of the push button 93. The push button 93 is incorporated into the sliding body 92 via a leaf spring 96 serving as an elastic member. During sliding, the push button 93 is pressed down toward the cover member 30 to press the sliding body 92 against the inner surface of the cover member 30. Note that the entire sliding body 92, including the protrusions 98, may be made of resin. Also, the sliding portion on the inner surface of the cover member 30 may be provided with an uneven portion 39 (FIGS. 14 and 15) that is a striped groove along the sliding direction of the sliding body 92.

[0056] As described above, the band 100, watch 150, and band length adjustment mechanism of this embodiment can provide the following effects. According to the band 100, the connecting portion faces the inner surface of the cover member 30, and the connecting portion is a sliding body 92 that fits between a pair of rail portions 20, 21, the pressing portion is a rectangular push button 93 having a long side in the short direction of the cover member 30, and the engaging portion is a pair of protrusions 97 provided on the short sides of the push button 93, and the push button 93 is incorporated into the sliding body 92 via a leaf spring 96 that serves as an elastic member, and when sliding, the push button 93 is pushed down toward the cover member 30, thereby pressing the sliding body 92 against the inner surface of the cover member 30.

[0057] This allows the length of the band to be adjusted by pressing down the push button 93 and pressing the slider 92 against the inner surface of the cover member 30, which is convenient and easy to use. Therefore, it is possible to provide a band 100 and a watch 150 equipped with a band length adjustment mechanism that allows for easy length adjustment. Furthermore, because the two protrusions 98 of the slider 92 that slide against the inner surface of the cover member 30 during length adjustment are made of resin, the friction between them and the metal cover member 30 is small, providing excellent sliding properties and reducing wear between the components. This makes it possible to provide a band that has high sliding durability during length adjustment and an excellent aesthetic appearance.

[0058] Furthermore, the portion of the inner surface of the cover member 30 that comes into contact with the sliding body 92 is provided with an uneven portion 39 along the sliding direction. This reduces the contact area during sliding, thereby further reducing sliding resistance. [Explanation of symbols]

[0059] 2...link, 2b...end link, 2c...end link, 4...through hole, 5...hook, 6...hook, 8...through hole, 10...first band, 11...connecting link, 15...second band, 20...rail portion, 20a...through hole, 20b...fixing hole, 21...rail portion, 21a...through hole, 21b...fixing hole, 22...adjusting link, 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 part, 37...storage part, 39...concave and concave part, 41...latch pin, 47...storage part, 50...adjustment part, 55...adjustment part, 65...bottom surface, 66...second surface, 68...long hole, 72...adjustment piece, 72b...projection part, 72c...projection part, 73...pressing part, 74...pressing case, 74a...storage part, 74b...long hole, 75...lid body, 75a...shaft, 76...first surface, 77...placing part, 78...groove, 80...adjustment part, 83...main body part, 84b...projection part, 84...contact part, 85...lid body, 92...sliding body, 92b...main body part, 93...push button, 96...plate spring, 97...projection part, 98...ridge part, 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 a pair of rails arranged along the inner sides of the two side walls of the cover member in the longitudinal direction of the cover member, the rails having a plurality of grooves for adjusting the length; a pressing portion including an elastic member; a connecting portion having one end connected to an end of the first band; an engaging portion provided on the pressing portion and capable of engaging with the groove of the rail portion, the engaging portion is provided so as to be able to select the groove of the rail portion by pressing the pressing portion toward the cover member, A portion of the pressing portion or the connecting portion that faces the inner surface of the cover member and slides against the inner surface of the cover member is made of resin. band.

2. the pressing portion faces the inner surface of the cover member, The pressing portion is a lid body that abuts against the inner surface of the cover member; a pressing case that is paired with the lid; the elastic member is disposed between the cover and the pressing case, the engaging portion is an engaging pin, the connecting portion is an adjustment piece that is connected to the pressing portion by the engagement pin, During the sliding movement, the adjusting piece is in a state where it stands upright relative to the cover member with the engaging pin as a rotation axis, and the adjusting piece presses the pressing portion toward the cover member. The band according to claim 1 .

3. The lid body is made of resin.

3. The band according to claim 2.

4. The lid body has a two-body structure, a metal main body; a contact portion attached to the main body portion and contacting the inner surface of the cover member, The contact portion is made of resin.

3. The band according to claim 2.

5. a recessed and protruding portion provided along the sliding direction on the inner surface of the cover member at a portion that contacts the lid body; 3. The band according to claim 2.

6. the connecting portion faces the inner surface of the cover member, the connecting portion is a sliding body that fits between the pair of rail portions, the pressing portion is a rectangular push button having a long side in a short direction of the cover member, the engaging portions are a pair of protrusions provided on the short sides of the push button, the push button is incorporated into the sliding body via the elastic member, During the sliding, the push button is pressed down toward the cover member, thereby pressing the sliding body against the inner surface of the cover member. The band according to claim 1 .

7. a concave-convex portion is provided along the sliding direction on a portion of the inner surface of the cover member that comes into contact with the sliding body; 7. The band according to claim 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 a pair of rails arranged along the inner sides of the two side walls of the cover member in the longitudinal direction of the cover member, the rails having a plurality of grooves for adjusting the length; a pressing portion including an elastic member; a connecting portion having one end connected to an end of the first band; an engaging portion provided on the pressing portion and capable of engaging with the groove of the rail portion, the engaging portion is provided so as to be able to select the groove of the rail portion by pressing the pressing portion against the inner surface side of the cover member, The pressing portion facing the inner surface of the cover member or the portion of the connecting portion that slides against the inner surface of the cover member is made of resin. Band length adjustment mechanism.

Images