ARM-WEARABLE DEVICE AND TIMEPIECE

Abstract

An arm-wearable device includes: a device main body; and a band that includes a part that has elasticity and a part that allows adjustment of a length of the band by a method other than elasticity. The band is configured such that the length of the band is adjustable as a whole.

Claims

1. An arm-wearable device comprising: a device main body; and a band that includes a part that has elasticity and a part that allows adjustment of a length of the band by a method other than elasticity, wherein the band is configured such that the length of the band is adjustable as a whole.

2. The arm-wearable device according to claim 1, wherein: the part that has elasticity is an elastic member provided at a first side of the device main body, and the part that allows adjustment of the length of the band by a method other than elasticity is a band main body provided at a second side of the device main body different from the first side.

3. The arm-wearable device according to claim 2, wherein: the elastic member has restoring force, and the band main body is less elastic than the elastic member.

4. The arm-wearable device according to claim 2, wherein: the device main body includes a pair of band attachment parts at opposite positions, the band main body includes an end piece, and the end piece is attached to the band attachment part at the second side of the device main body.

5. The arm-wearable device according to claim 3, wherein: the device main body includes a pair of band attachment parts at opposite positions, the band main body includes an end piece, and the end piece is attached to the band attachment part at the second side of the device main body.

6. The arm-wearable device according to claim 2, wherein: the device main body includes a pair of band attachment parts at opposite positions, the band main body is attached to the band attachment part at the second side of the device main body, and the band main body includes a buckle at a free end side of the band main body.

7. The arm-wearable device according to claim 3, wherein: the device main body includes a pair of band attachment parts at opposite positions, the band main body is attached to the band attachment part at the second side of the device main body, and the band main body includes a buckle at a free end side of the band main body.

8. The arm-wearable device according to claim 4, wherein: the device main body includes a pair of band attachment parts at opposite positions, the band main body is attached to the band attachment part at the second side of the device main body, and the band main body includes a buckle at a free end side of the band main body.

9. The arm-wearable device according to claim 6, further comprising a connection member, wherein: the connection member is attached to the band attachment part at the first side of the device main body, the elastic member is attached to the connection member, at least one end of the elastic member is connected to the buckle, and a length of the band main body is adjustable with the buckle.

10. The arm-wearable device according to claim 7, further comprising a connection member, wherein: the connection member is attached to the band attachment part at the first side of the device main body, the elastic member is attached to the connection member, at least one end of the elastic member is connected to the buckle, and a length of the band main body is adjustable with the buckle.

11. The arm-wearable device according to claim 8, further comprising a connection member, wherein: the connection member is attached to the band attachment part at the first side of the device main body, the elastic member is attached to the connection member, at least one end of the elastic member is connected to the buckle, and a length of the band main body is adjustable with the buckle.

12. The arm-wearable device according to claim 2, wherein: the band main body includes a belt-shaped band part, and at least parts of the band part overlap with each other in a length direction of the band part.

13. The arm-wearable device according to claim 3, wherein: the band main body includes a belt-shaped band part, and at least parts of the band part overlap with each other in a length direction of the band part.

14. The arm-wearable device according to claim 4, wherein: the band main body includes a belt-shaped band part, and at least parts of the band part overlap with each other in a length direction of the band part.

15. The arm-wearable device according to claim 6, wherein: the band main body includes a belt-shaped band part, and at least parts of the band part overlap with each other in a length direction of the band part.

16. The arm-wearable device according to claim 9, wherein: the band main body includes a belt-shaped band part, the buckle includes bars that are perpendicular to a length direction of the band part, and the length of the band main body is adjusted by winding the band part around the bars.

17. The arm-wearable device according to claim 9, wherein: the elastic member is a loop member, the connection member includes a loop catcher, and the loop member is caught on the loop catcher and thereby connected to the band attachment part via the connection member.

18. The arm-wearable device according to claim 9, wherein: the buckle includes an attachment part to which one end of the elastic member is connected and a lock projection, and when the arm-wearable device is worn, the elastic member is folded back at the connection member, and another end of the elastic member is locked by the lock projection.

19. The arm-wearable device according to claim 18, wherein the elastic member includes a pull part at a portion to be locked by the lock projection of the buckle.

20. A timepiece comprising: a timepiece main body; and a band that is attached to the timepiece main body and that includes a part that has elasticity and a part that allows adjustment of a length of the band by a method other than elasticity, wherein the band is configured such that a length of the band is adjustable as a whole.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0005] FIG. 1 is a perspective external view of a timepiece equipped with a band according to an embodiment.

[0006] FIG. 2 is an exploded perspective view of the band that is disassembled into parts according to the embodiment.

[0007] FIG. 3 is a perspective view of the band assembled from the parts of FIG. 2.

[0008] FIG. 4 is a perspective external view of a buckle of a band main body constituting the band of the embodiment.

[0009] FIG. 5 is a plan view of the buckle viewed in the direction of the arrow V in FIG. 4.

[0010] FIG. 6 is a plan view of the buckle viewed in the direction of the arrow VI in FIG. 4.

[0011] FIG. 7 is a cross-sectional view of the buckle along the VII-VII line in FIG. 5.

[0012] FIG. 8 is a schematic plan view of a connection member constituting the band of the embodiment.

[0013] FIG. 9 is a perspective external view of a timepiece equipped with a band according to a modification.

DETAILED DESCRIPTION

[0014] An embodiment of an arm-wearable device according to the present disclosure is described with reference to FIG. 1 to FIG. 8. In the following embodiment, the arm-wearable device is a timepiece (wristwatch) wearable on the arm (e.g., wrist). Hereinafter, the arm-wearable device is simply referred to as a timepiece. Embodiments of the present disclosure are not limited to this embodiment.

[Structure]

[0015] As illustrated in FIG. 1, the timepiece 100 as the arm-wearable device includes a device main body and a band 2 that is attached to the device main body. In this embodiment, the device main body is the timepiece main body 1. The timepiece main body 1 includes a main body case 11 and a pair of band attachment parts 12. The band attachment parts 12 are provided at opposite positions on the main body case 11. The opposite positions are the ends corresponding to 12 o'clock and 6 o'clock of an analog timepiece, for example. In FIG. 1, the band attachment part 12a is at the end corresponding to 12 o'clock, and the band attachment part 12b is at the end corresponding to 6 o'clock. In the embodiment, the band attachment parts 12a and 12b have the same shape and configuration. When simply referred to as the band attachment part 12, the band attachment part 12 may include both the band attachment parts 12a and 12b.

[0016] Japanese Utility Model Registration No. 3088951 describes a timepiece equipped with an arm-wearable band that is elastic in its longitudinal direction. Such a timepiece is easily wearable on and detachable from the arm.

[0017] However, the thickness of the arm greatly differs among individuals. When one type of band is applied to various arms, wearers feel differently even if the band is elastic. The band may be loose for some wearers but may be tight for other wearers. Some wearers may feel too tight. Further, a wearer may wear the arm-wearable device (e.g., timepiece) on his/her arm directly or over his/her clothing, depending on the situation. Elasticity of the band alone is not enough for dealing with such cases.

[0018] The present disclosure has been conceived in view of the above circumstances. An object of the present disclosure is to provide an arm-wearable device and a timepiece that are easily attachable and detachable and that allow easy adjustment of the band length.

[0019] The back surface side of the main body case 11 is covered by a back cover 13. FIG. 1 is a perspective view of the timepiece 100 viewed from the back cover 13 side. Although not illustrated, an operation receiver, such as a press button(s) and a crown, is provided on the lateral side of the main body case 11. The main body case 11 also houses not-illustrated modules, such as a display. The timepiece 100 may include an analog display including hands (not illustrated). The timepiece 100 may include a digital display including a liquid crystal display. The timepiece 100 may include a hybrid display having both the digital and analog displays.

[0020] The band 2 includes a part that has elasticity and a part that allows adjustment of the band length by a method other than elasticity. Specifically, the band 2 includes a band main body 3, a connection member 5, and a loop member 6. The loop member 6 corresponds to the part that has elasticity, as described later. In this embodiment, the length of the band main body 3 is adjustable at a buckle 4, which is described later. The band main body 3 corresponds to the part that allows adjustment of the band length by a method other than elasticity. Thus, the band 2 includes the part that has elasticity and the part that allows adjustment of the band length by a method other than elasticity, so that the length of the band 2 is adjustable as a whole.

[0021] The band main body 3 includes a band part 31, an end piece 32, the buckle 4, and a free ring 34. The band part 31 is made of nylon fiber, for example, and has a long belt shape. The length of the band part 31 is not limited to a specific length. Preferably, the length of the band part 31 is equal to or longer than the outer circumference of the arm (especially the wrist) of an average adult, for example. One end (the base end) of the band part 31 is fastened to one end of the end piece 32 (a band part fastening part 321 described later). To fasten the band part 31, the band part 31 is wound around the end piece 32, and the end parts of the band part 31 are sewn together, for example. The method of fastening the band part 31 to the end piece 32 is not specifically limited. The band part 31 may be fastened by glue or screws, for example. As illustrated in FIG. 1, the other end (free end) of the band part 31 is folded back at the buckle 4 so that the free end of the band part 31 comes at the timepiece main body 1 side. The free end of the band part 31 folded back at the buckle 4 is inserted to the free ring 34. Thus, the free end side of the band part 31 overlaps with the base end side of the band part 31, and this overlapping state is maintained.

[0022] One end of the end piece 32 is the band part fastening part 321 for fastening the band part 31. The other end of the end piece 32 is a main body attachment part 322 to be attached to the band attachment part 12. In the example of FIG. 1, the main body attachment part 322 of the end piece 32 is attached to the band attachment part 12b at the 6 o'clock position of the timepiece main body 1. The band attachment part 12b has a recess for receiving the main body attachment part 322, and the main body attachment part 322 is a projection that fits to the recess, for example. The main body attachment part 322 has a through hole 323 that passes through the main body attachment part 322 in the band width direction W (see FIG. 3, for example). The recess of the band attachment part 12b has a not-illustrated hole that communicates with the through hole 323 at a position corresponding to the through hole 323. For example, a not-illustrated axis part is inserted to the through hole 323 formed in the projection of the main body attachment part 322 and the hole formed in the recess of the band attachment part 12b, so that the end piece 32 is connected to the band attachment part 12, namely to the timepiece main body 1. The end piece 32 may be attached to either of the pair of the band attachment parts 12. Depending on the usability of a user, the end piece 32 may be attached to the band attachment part 12a.

[0023] As illustrated in FIG. 4 to FIG. 7, the buckle 4 includes a frame 41, an attachment part 42, a lock projection 43, a first bar 44, and a second bar 45. The frame 41 is the outer frame of the buckle 4. The inner width of the frame 41 is wider than the width of the band part 31. The attachment part 42 is formed at one end of the frame 41 farther from the end piece 32 in the band length direction L. To the attachment part 42, one end of the loop member 6 (elastic member) described later is connected. For example, as illustrated in FIG. 6, the attachment part 42 has cut portions 421 in which the loop member 6 can be fit and locked. Once the loop member 6 is fitted to the cut portions 421, the loop member 6 does not easily come off. The structure for connecting the loop member 6 to the attachment part 42 is not specifically limited as long as the loop member 6 does not easily come off. It is preferable that the loop member 6 is attachable and detachable without a special tool so that the user can replace the loop member 6.

[0024] When the band 2 (the timepiece 100 including the band 2) is worn, an end of the loop member 6 other than the end connected to the attachment part 42 is locked by the lock projection 43. In the embodiment, as illustrated in FIG. 1, the loop member 6 is attached to the connection part 5 described later. One end of the loop member 6 is connected to the attachment part 42; the loop member 6 is folded back at the connection member 5; and the other end of the loop member 6 is locked by the lock projection 43. It is preferable that the lock projection 43 has a hook shape as illustrated in FIG. 4 and FIG. 7 so that the loop member 6 is easily caught.

[0025] The first bar 44 and the second bar 45 are provided at the inner side of the frame 41 to be substantially perpendicular to the length direction L of the band part 31. The first bar 44 and the second bar 45 are arranged in the band length direction L to be parallel to each other like a ladder. As illustrated in FIG. 7, it is preferable that the first bar 44 and the second bar 45 are arranged at different positions in the thickness direction H of the band 2. That is, the first bar 44 closer to the lock projection 43 is provided at a higher position in the thickness direction H, and the second bar 45 closer to the attachment part 42 is provided at a lower position in the thickness direction H. The arrangements, the shapes, and so forth of the first bar 44 and the second bar 45 are not limited to the illustrated example. The band part 31 is wound around the first bar 44 and the second bar 45. Since the first bar 44 and the second bar 45 are arranged at different heights, the band part 31 can be easily wound and caught. As described later, in this embodiment, the length of the band main body 3 can be adjusted by winding the band part 31 around the first bar 44 and the second bar 45.

[0026] The connection member 5 is attached to the band attachment part opposite the band attachment part to which the end piece 32 of the band main body 3 is attached. In the example illustrated in FIG. 1, the connection member 5 is attached to the band attachment part 12a at the 12 o'clock position of the timepiece main body 1. As illustrated in FIG. 8 and so forth, one end of the connection member 5 is a main body attachment part 51 to be attached to the band attachment part 12 of the timepiece main body 1; and the other end is a loop member attachment part 52 to which the loop member 6 is attached. The band attachment part 12a has a recess for receiving the main body attachment part 51, and the main body attachment part 51 is fitted to the recess, for example. The main body attachment part 51 has a through hole 511 that passes through the main body attachment part 51 in the band width direction W (see FIG. 3 and FIG. 8, for example). The recess of the band attachment part 12a has a not-illustrated hole that communicates with the through hole 511 at a position corresponding to the through hole 511. For example, a not-illustrated axis part is inserted to the through hole 511 of the main body attachment part 51 and the hole of the band attachment part 12a, so that the connection member 5 is connected to the band attachment part 12a, namely to the timepiece main body 1.

[0027] As illustrated in FIG. 8, the loop member attachment part 52 has a slit 521 through which the loop member 6 can be inserted. At both ends of the slit 521 in the band width direction W, loop catchers 522 are formed that can catch the loop member 6. The loop catchers 522 are cut portions having the shape corresponding to the cross-sectional shape of the loop member 6. In this embodiment, the loop catchers 522 have a substantially circular shape. When the loop member 6 is caught in the loop catchers 522 formed at both ends of the slit 521, the loop member 6 is prevented from twisting or getting unbalanced in the slit 521. By being caught in the loop catchers 522, the loop member 6 is connected to the band attachment part 12a via the connection member 5. The structure for connecting the loop member 6 to the connection member 5 is not specifically limited as long as the loop member 6 does not easily come off. It is preferable that the loop member 6 is attachable and detachable without a special tool so that the user can replace the loop member 6.

[0028] The loop member 6 is an elastic member having flexibility. The loop member 6 is attached to the connection member 5, and at least one end of the loop member 6 is connected to the buckle 4. Specifically, the loop member 6 includes an endless loop main body 61 made of resin, such as rubber, for example. The loop member 6 is inserted to the slit 521 of the connection member 5, and the loop main body 61 is fitted to the loop catchers 522 at both ends of the slit 521. The loop catchers 522 each have a diameter slightly greater than the diameter of the cross section of the loop member 6 (the loop main body 61). Thus, the loop member 6 (the loop main body 61) can slide in the loop catchers 522. As illustrated in FIG. 3 and so forth, one end of the loop member 6 is fitted to the cut portions 421 and thereby locked by the attachment part 42 of the buckle 4. When the band 2 is worn, the loop member 6 is folded back at the connection member 5, and the other end of the loop member 6 is caught by the lock projection 43 of the buckle 4 and locked. The end of the loop member 6 to be caught on the lock projection 43 is provided with a pull part 62. The pull part 62 (tag) is made of any kind of cloth. The pull part 62 may bear a logotype, for example. The pull part 62 is not essential for the loop member 6.

[Function]

[0029] Following is the description of how the timepiece 100 as the arm-wearable device in this embodiment functions and how to wear the timepiece 100, specifically the band 2 of the timepiece 100. To attach the band 2 to the main body case 11 of the timepiece 100 in this embodiment, the main body attachment part 51 of the connection member 5 is attached to the band attachment part 12a; and the main body attachment part 322 of the band main body 3 is attached to the band attachment part 12b. Herein, the band main body 3 is assembled as illustrated in FIG. 3 before being attached to the band attachment part 12b. Specifically, one end of the band part 31 is fastened to the band part fastening part 321 of the end piece 32 by sewing, for example. The band part 31 is inserted to the free ring 34. The other end (free end) of the band part 31 is inserted to the frame 41 from the side where the lock projection 43 of the buckle 4 is provided. The band part 31 is passed over the first bar 44 from the lower side of the buckle 4, passed over the second bar 45, folded back at the second bar 45, and passed below the second bar 45. The band part 31 is then passed over the first bar 44, and the end of the band part 31 is pulled out toward the timepiece main body 1. The length of the pulled-out band part 31 is adjusted to adjust the entire length of the band main body 3. The end of the pulled-out band part 31 is inserted to the free ring 34. Thus, the free end side of the band part 31 is kept overlapped with the base end side of the band part 31, and the band main body 3 is in the assembled state.

[0030] Next, the loop member 6 is attached to the connection member 5 attached to the band attachment part 12 of the timepiece main body 1. Specifically, the loop member 6 is inserted to the slit 521 of the loop member attachment part 52 of the connection member 5. Herein, the loop member 6 is inserted to the slit 521 such that the side provided with the pull part 62 comes at the 12 o'clock position of the timepiece to which the band main body 3 is attached and that the opposite side comes at the 6 o'clock position. The loop member 6 is then slidably caught in the loop catchers 522 formed at both ends of the slit 521. Further, one end of the loop member 6 (the loop main body 61) that does not have the pull part 62 is locked by the attachment part 42 of the buckle 4. Thus, the band 2 is attached to the timepiece main body 1.

[0031] When the user wears the timepiece 100 as the arm-wearable device on his/her arm (e.g., wrist), the user inserts his/her arm in the loop formed by the timepiece main body 1 and the band 2. The user folds back the loop member 6, one end of which is locked by the attachment part 42 of the buckle 4, at the connection member 5 and pulls the other end of the loop member 6 having the pull part 62 toward the buckle 4 of the band main body 3. The user catches the other end of the loop member 6 on the lock projection 43 of the buckle 4 and thereby locks the loop member 6. The user adjusts the length of the band main body 3 as needed, depending on how it feels on the arm (wrist). That is, when the timepiece 100 is loose or tight, the user pulls out the free end of the band part 31 from the free ring 34 and shortens/lengthens the length of the band part 31 wound around the first bar 44 and the second bar 45 of the buckle 4. Thus, the user adjusts the basic length of the band main body 3. After adjusting the band to a desired length, the user again inserts the free end of the band part 31 to the free ring 34 and locks the free end to keep the adjusted length. Thus, the timepiece 100 is worn on the wrist.

[0032] The band 2 of the timepiece 100 can be easily detached from the wrist by simply detaching the pull part 62 side of the loop member 6 from the lock projection 43 of the buckle 4. The band 2 of this embodiment provides the same fitting feeling unless the user changes the length of the band main body 3. Therefore, the user does not need to adjust the band length each time the user wears/detaches the timepiece 100.

[Effects]

[0033] As described above, according to the embodiment, the timepiece 100 is an arm-wearable device including the band 2. The band 2 is attached to the device main body 1 that includes a pair of band attachment parts 12a and 12b provided at opposite positions. The band 2 includes: the band main body 3 that is attached to one band attachment part 12 and the free end of which has the buckle 4; the connection member 5 that is attached to the other band attachment part 12; and the elastic loop member 6 that is attached to the connection member 5 and at least one end of which is connected to the buckle 4. The length of the band main body 3 is adjustable at the buckle 4. Thus, the band length can be easily adjusted with the band main body 3. Further, once the length of the band main body 3 is adjusted, the same fitting feeling is maintained even after attachment and detachment of the timepiece 100. Further, since the band 2 includes the loop member 6 made of rubber or the like and having flexibility, elasticity, and restoring property, the band 2 can be easily worn and detached. Further, with the flexible loop member 6, the band 2 can naturally fit the arm when being worn.

[0034] Further, according to the embodiment, the band main body 3 includes the belt-shaped band part 31. The buckle 4 includes bars (the first bar 44 and the second bar 45) perpendicular to the length direction of the band part 31. By winding the band part 31 around the bars 44 and 45, the length of the band main body 3 can be adjusted. Thus, the length of the band main body 3 can be easily adjusted with a simple structure.

[0035] Further, according to the embodiment, the connection member 5 includes the loop catchers 522. By being caught in the loop catchers 522, the loop member 6 is connected to the band attachment part 12 via the connection member 5. Thus, the loop member 6 is caught in the connection member 5 by simply being caught in the loop catchers 522. Therefore, the loop member 6 can be detached from the connection member 5 by being strongly pulled without a special tool. The user can easily change the loop member 6 as desired.

[0036] Further, according to the embodiment, the buckle 4 includes: the attachment part 42 to which one end of the loop member 6 is connected; and the lock projection 43 that locks the other end of the loop member 6 folded at the connection member 5 when the belt 2 is worn. Thus, the user can easily wear/detach the 2 band by simply attaching/detaching the loop member 6 to/from the lock projection 43.

[0037] Further, according to the embodiment, the loop member 6 includes the pull part 62 at a portion to be locked by the lock projection 43 of the buckle 4. Thus, the user can attach/detach the loop member 6 to/from the lock projection 43 by holding the pull part 62 and pulling the loop member 6. Thus, even when the loop member 6 is tightly fitted to the lock projection 43, the user can easily detach/attach the loop member 6 by strongly pulling the loop member 6. Further, with the pull part 62 (e.g., cloth tag) provided to the part to be locked by the lock projection 43, the loop member 6 is less likely to be worn out after repetitive attachment and detachment. Thus, the durability of the loop member 6 is improved.

[0038] When the user wears the timepiece 100 on the left arm, the user pulls the pull part 62 of the loop member 6 (elastic member) toward the user's body with the right hand. In such a case, it is preferable that the loop member 6 (elastic member) is provided at the 12 o'clock side of the timepiece 100.

[0039] When the configuration of the above embodiment is applied to a timepiece, the timepiece is easily attachable and detachable and can be adapted to various thicknesses of arms (wrists). For example, one timepiece can be worn by both men and women. Further, one type of band 2 can cope with various cases, such as a case of wearing the timepiece directly on the arm or a case or wearing the timepiece over a jacket, for example.

[0040] Although the embodiment of the present disclosure has been described above, the embodiment does not limit the present disclosure and can be variously modified without departing from the scope of the present disclosure. For example, the band part 31 constituting the band main body 3 may not be made of cloth tape. For example, the band part 31 may be made of leather or synthetic resin of any type, such as silicone or urethane, as long as the band part 31 can be wound around the bars of the buckle 4 (the first bar 44 and the second bar 45) and folded back. Further, the loop main body 61 of the loop member 6 may not be made of resin, such as rubber, as long as the loop main body 61 at least has flexibility. For example, the loop main body 61 may be a leather cord or a chain of any kind of metal to have flexibility. Further, according to the above embodiment, the timepiece 100 at least includes the timepiece main body 1 (device main body), the band main body 3 that is provided to one end of the timepiece main body 1 and that allows adjustment of the length of the band overlapping in the length direction, and the elastic member (the loop member 6) that is provided to the other end of the timepiece main body 1. However, the entire loop member 6 (elastic member) may not be elastic as long as at least part of the loop member 6 is elastic.

[First Modification]

[0041] The entire elastic member may not have a loop shape like the loop member 6. For example, the elastic member may be one piece of rubber cord both ends of which are ring-shaped. The ring at one end of the cord is caught on and thereby attached to the axis of the T-shaped attachment part 42 of the buckle 4, and the ring at the other end of the cord is caught and locked by the lock projection 43 of the buckle 4.

[Second Modification]

[0042] The band part 31 of the band main body 3 may not be folded back at the buckle 4. At least the length of the parts of the band part 31 of the band main body 3 overlapping in the length direction should be adjustable. For example, there may be two band parts 31, and the two band parts 31 may be configured such that the length of the parts of the band parts 31 overlapping with each other in the length direction is adjustable as desired. Specifically, the two band parts 31 include: a first band part one end of which is attached to the end piece 32 connected to the band attachment part 12b of the timepiece main body 1; and a second band part at least part of which in the length direction overlaps with the first band part. At least part of both the first band part and the second band part is a surface fastener (e.g., magic tape, registered trademark). Thus, the first band part and the second band part can be easily attached to each other at a desired position by a single touch, and the band parts can be repeatedly attachable to and detachable from each other.

[Third Modification]

[0043] Although the elastic member (loop member 6) is attached to the connection member 5 and at least one end of the elastic member is connected to the buckle 4, the present disclosure is not limited to this configuration. The elastic member may be directly fixed to the second band part without the connection member 5 in-between. For example, one end of the elastic member may be sewn on the second band part. In such a case, the length of the band in the length direction is adjustable by fastening the first band part and the second band part connected to the elastic member by using a surface fastener, for example.

[Fourth Modification]

[0044] An embodiment of the arm-wearable device according to a fourth modification is described with reference to FIG. 9. As with the above embodiment, in the fourth modification, the arm-wearable device (a timepiece 200 in FIG. 9) includes the timepiece main body 1 (device main body) including the main body case 11 and a band 20. The band 20 includes: a band main body 7 that is provided at one end of the timepiece main body 1 and that allows adjustment of the overlapping band length in the length direction; and an elastic member (a loop member 8) that is provided at the other end of the timepiece main body 1. The configuration of the band main body 7 in the fourth modification is different from that in the above embodiment. According to the arm-wearable device (timepiece 200) of the fourth modification, the band main body 7 does not include a buckle or a free ring. The band main body 7 may include fastening parts 40 for fastening the loop member 8 on the front surface of the band part 71, instead of the lock projection 43 in the above embodiment.

[0045] The fastening parts 40 are hooks, as illustrated in FIG. 9, for example. The fastening parts 40 are not limited to hooks but may be buttons, for example. The fastening parts 40 (hooks or buttons) are provided at a predetermined interval in the length direction of the band part 71. The user can adjust the length and fit of the band 20 as desired by catching the loop member 8 on one of the fastening parts 40 (hooks or buttons). The fastening part is not limited to a hook or a button. For example, the band part may have a surface fastener. In such a case, the band part includes multiple projection parts in the length direction of the band main body for attaching the loop member 8. The projections protrude from the band part, and one end of each projection is attached to the band main body. The band main body fastens the loop member by sandwiching the loop member between the other ends (tip ends) of the protrusions and the band main body. There may not be multiple projections formed on the band main body. There may be only one projection of a certain length provided along the length direction of the band main body. Since the band part has a surface fastener, a single protrusion can fasten the loop member at a desired position.

[0046] Further, the arm-wearable device provided with the band is not limited to a timepiece. The band is also applicable to arm-wearable devices, such as various smartwatches, electronic devices such as sports watches, and various electronic devices that obtain biometric information including the heartbeat and the blood flow as well as current time, for example.

[0047] Although some embodiments of the present disclosure have been described, the scope of the present disclosure is not limited to the above embodiments but may be formed by combining the elements of the embodiments. The scope of the present disclosure includes the scope of the invention described in the claims and its equivalents.