Clasp structure for band, watch band, and wristwatch

Abstract

To finely adjust the length of a band at a clasp part with a structure different from a conventional one.SOLUTION: Provided is a clasp, including a slide member 30 sliding in a clasp main body 20 in a longitudinal direction of a band, an operation member 40 locking the slide member 30 in the clasp main body 20, and an energizing member 50 energizing the operation member 40 in a thickness direction in the clasp main body 20. The operation member 40 has an operation portion 41 that is exposed on a back surface 21 side of the clasp main body 20 and is capable of pressing the operation member 40 energized by the energizing member 50 to the counter-energizing side, and an operation member-side engaging portion 45 that interlocks with the operation portion 41 and engages with the slide member 30, and the slide member 30 has a slide member-side engaging portion 32 in which two or more engaging portions 33 that engage with the operation member-side engaging portion 45 are continuously provided in the longitudinal direction of the band.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a clasp for a band that opens and closes when fastening or detaching a band such as a watch band. [Background technology]

[0002] When adjusting the length of a metal band, you can do so by removing or attaching the band links that make up the band. However, this process can be tedious and requires special tools, so bands with clasps that allow for fine length adjustment have been developed.

[0003] For example, Patent Document 1 discloses a clasp structure comprising a push button holding member that accommodates a pair of push buttons so that the push buttons can be seen and hidden through a push button opening formed in the short direction of the ornament, and a retaining means that prevents the push buttons from falling out of the push button holding member, and an ornament length fine adjustment means that comprises a button side engagement means that can slide in the short direction of the ornament in conjunction with the operation of the push buttons, and a slide plate that can engage with the button side engagement means, and the clasp structure and ornament length fine adjustment means are attached to the clasp body of the ornament. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-325606 Summary of the Invention [Problem to be solved by the invention]

[0005] Indeed, the technique disclosed in Patent Document 1 is extremely convenient because it allows the length of the band to be easily adjusted at the clasp without changing the band links. However, because the push button used to operate the clasp also serves as the operating button for fine adjustment, there is a risk that the fine adjustment may be accidentally activated when opening or closing the clasp. Also, because the push button protrudes from the clasp, there is a possibility that the push button may be accidentally caught and cause a malfunction.

[0006] Therefore, the inventor of the present invention has completed the present invention, which uses a structure different from conventional structures to enable fine adjustment of the length of the band at the clasp. [Means for solving the problem]

[0007] The first invention of the present invention is a clasp for a band that is located between two bands and opens and closes when the band is fastened or detached. The clasp comprises: a slide member that connects to one end of the band and slides longitudinally within the clasp body; an operating member that locks the slide member within the clasp body; and a biasing member that biases the operating member in the thickness direction of the clasp body. The operating member has an operating section that is exposed on the back side of the clasp body and can be operated to press the operating member, biased by the biasing member, toward the opposite biasing side, and an operating member-side engaging section that is linked to the operating section and engages with the slide member. The slide member has a slide member-side engaging section that has two or more engaging portions that engage with the operating member-side engaging portions consecutively in the longitudinal direction of the band. The operating member-side engaging portion of the operating member biased by the biasing member engages with one of the engaging portions of the slide member-side engaging portion to fix the slide member within the clasp body, and has a fine adjustment function that allows the position of the slide member to be adjusted by pressing the operating section to release the engagement. The second invention is a clasp structure for a band according to the first invention, characterized in that the operating member side engaging portion has an engaging inclined surface that is inclined in the biasing direction of the biasing member, and the sliding member side engaging portion has an inclined engaging portion that corresponds to the engaging inclined surface. The third invention is a clasp structure for a band according to the first or second invention, characterized in that a locking claw is provided on a folding member that connects to the other end of the band and closes the clasp by bending it toward the back side of the clasp body, and this locking claw is locked onto a connecting pin inside the clasp body. The fourth invention is a clasp structure for a band according to the first or second invention, characterized in that a locking protrusion is provided on a folding member that is connected to the other end of the band and closes the clasp by bending it toward the back side of the clasp body, and this locking protrusion is locked into a receiving device provided on the clasp body. The fifth invention is a watch band characterized by comprising a band clasp structure according to any one of the first to fourth inventions. The sixth invention is a wristwatch equipped with the watch band according to the fifth invention. [Effects of the Invention]

[0008] The present invention has the following advantages. (1) In the present invention, the operating part is located on the back side of the clasp body, so it is not exposed when the band is fastened. This eliminates the risk of malfunction due to contact with the outside, and also provides a neat appearance. (2) Furthermore, since the slide member is fixed by the engagement between the inclined engagement surface of the engagement portion on the operating member side and the inclined engagement portion on the engagement portion on the slide member side, fine adjustment of the slide member in one direction (one-way) is possible without the need to release the engagement state by pressing the operating portion. (3) Furthermore, by using a clasp structure in which the locking claws are locked onto the connecting pins inside the clasp body, even if the clasp is given a fine adjustment function, it can be kept compact without becoming larger. (4) Furthermore, by using a clasp structure in which the locking projection is locked to a receiving device provided on the clasp body, the fine adjustment function of the present invention can be provided even to clasps with conventional push-type clasps. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an explanatory diagram (1) illustrating a first embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram (2) for explaining the first embodiment of the present invention. [Figure 3] FIG. 3 is an explanatory diagram (3) for explaining the first embodiment of the present invention. [Figure 4]FIG. 4 is an explanatory diagram (4) for explaining the first embodiment of the present invention. [Figure 5] FIG. 5 is an explanatory diagram (5) for explaining the first embodiment of the present invention. [Figure 6] FIG. 6 is an explanatory diagram (6) for explaining the first embodiment of the present invention. [Figure 7] FIG. 7 is an explanatory diagram (7) for explaining the first embodiment of the present invention. [Figure 8] FIG. 1 is an explanatory diagram (1) for explaining a second embodiment of the present invention. [Figure 9] FIG. 2 is an explanatory diagram (2) for explaining a second embodiment of the present invention. [Figure 10] FIG. 3 is an explanatory diagram (3) for explaining a second embodiment of the present invention. [Figure 11] FIG. 4 is an explanatory diagram (4) for explaining a second embodiment of the present invention. [Figure 12] FIG. 5 is an explanatory diagram (5) for explaining a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described with reference to the drawings. 1 to 7 are explanatory diagrams illustrating a first embodiment of the present invention. FIG. 1 is an overall view showing a clasp structure for a hand according to a first embodiment. FIG. 1(a) shows a perspective view of a clasp structure 10 for a hand (hereinafter referred to as the clasp structure 10) from above, and FIG. 1(b) shows a perspective view of the clasp structure 10 from below. As shown in the figure, the clasp structure 10 comprises a clasp body 20, a slide member 30 that slides within the clasp body 20 in the longitudinal direction of the band, and an operating member 40 that has an operating portion 41 exposed on the back side of the clasp body 20.

[0011] FIG. 2 illustrates the slide member 30. As shown in the figure, the slide member 30 has a connecting portion 31 for connecting to the band, and a slide member side engaging portion 32 of the band. The slide member side engaging portion 32 has seven engaging portions 33 that engage with the operating member side engaging portion of the operating member 40 shown in Figure 3, and these engaging portions 33 are provided consecutively in the longitudinal direction of the band (the number of engaging portions 33 is arbitrary).

[0012] FIG. 3 illustrates the operating member 40. As shown, the operating member 40 includes an operating portion 41 shown in FIG. 1(b) and an operating-member-side engaging portion 45 via a connecting portion 44. The operating portion 41 is located inside the clasp body 20 and is biased toward the outside of the clasp body 20 by a biasing member. Reference numeral 42 denotes an attachment hole for attaching the biasing member. The operating-member-side engaging portion 45 has an engaging inclined surface 46 that engages with the engaging portion 33 of the slide-member-side engaging portion 32 shown in FIG. 2.

[0013] FIG. 4 is an explanatory diagram illustrating the engagement between the engagement inclined surface 46 and the engagement portion 33. As shown in FIG. As shown in the figure, the engaging inclined surface 46 forms a surface that is inclined in the biasing direction of the biasing member, and the slide member side engaging portion 32 forms a correspondingly inclined engaging portion 33 continuously. As a result, when the engaging inclined surface 46 is biased by the biasing member, the engaging inclined surface 46 and the engaging portion 33 engage with each other, and the slide member 30 is fixed within the clasp body 20.

[0014] Furthermore, when operating portion 41 is pressed to move operating member 40 in the opposite direction to the biasing force, engaging inclined surface 46 and engaging portion 33 are disengaged, and slide member 30 becomes free. Then, by sliding the slide member to any position, the length of the band can be finely adjusted. The engagement between the engaging inclined surface 46 and the engaging portion 33 is achieved by abutting on a surface that is inclined in the biasing direction of the biasing member, so that, for example, in Fig. 4, when sliding the slide member 30 to the left, it is not necessary to press the operating portion 41, but the slide member 30 can be slid by simply pushing it to the left. This is the effect of inclining the engagement between the two in the biasing direction.

[0015] 5 to 7 illustrate the internal structure of the clasp structure 10. FIG. It can be seen that the slide member 30 shown in FIG. 2 and the operating member 40 shown in FIG. 3 are engaged within the clasp body 20, and that the operating member 40 is biased outward from the clasp body 20 by the biasing member 50. Since the slide member 30 is connected to one end of the band 60 at the connecting portion 31, the slide member 30 can be slid in the longitudinal direction of the band 60 by the operation described in Figure 4, thereby allowing fine adjustment of the length of the band 60.

[0016] The operating portion 41 of the operating member 40 is exposed on the back surface 21 of the clasp body 20. The folding member 13, which connects to the other end of the band 60, is folded toward the back surface 21 of the clasp body 20 when the band 60 is fastened. This prevents the operating portion 41 from malfunctioning due to accidental contact, allowing for safe use. Furthermore, the presence of a fine adjustment function cannot be recognized from the clasp's appearance alone, which reduces constraints on the clasp design.

[0017] In the first embodiment, even though the clasp body 20 is equipped with the slide member 30, in order to make the size of the clasp body 20 comparable to that of a normal clasp body, the folding member 13 is provided with a locking pawl 14, which is locked to a connecting pin 15 (a connecting pin for connecting the folding member 13 to the clasp body 20) inside the clasp body 20. This allows the size of the clasp body 20 to be reduced.

[0018] 8 to 12 are explanatory diagrams illustrating a second embodiment of the present invention. The same reference numerals are used for the components common to the first embodiment. The clasp structure 10 according to the second embodiment differs from the first embodiment in that, instead of the locking pawl 14 provided on the bending member 13 of the first embodiment, a locking protrusion 17 is provided on the bending member 13. To lock the locking protrusion 17, a locking box 18 is provided on the clasp body 20 as a receiving device. The push button 19 in the overall view showing the hand clasp structure according to the second embodiment shown in Figures 8 and 9 is an operation button for releasing the locking of the locking protrusion 17 in the locking box 18.

[0019] FIG. 10 illustrates the slide member. The difference from the first embodiment is the length of the slide member side engaging portion 32. In consideration of the space of the clasp body 20, which is provided with the locking box 18, the first embodiment provides seven engaging portions 33, while the second embodiment provides four engaging portions 33 (however, this number is not limited to four).

[0020] 11 and 12 illustrate the internal structure of the clasp structure 10. FIG. In the second embodiment, by providing a locking box 18 inside the clasp body 20, it is possible to utilize the fine adjustment function of the present invention even in a "push-type clasp" that can be opened and closed with a push button 19, which is widely used in general. Here, by providing the locking box 18 inside the clasp body 20, the size of the clasp body 20 (particularly the length in the longitudinal direction of the band) is inevitably larger than in the first embodiment. However, as with the slide member 30 shown in Figure 10, it is possible to adjust the length of the slide member side engagement portion 32 by increasing or decreasing the number of engagement portions 33, thereby providing a clasp for a band of an appropriate size for the band. [Industrial Applicability]

[0021] The band clasp structure according to the present invention can be widely used for clasps for bands that require length adjustment, such as watch bands and wristbands. [Explanation of symbols]

[0022] 10. Clasp structure for band (clasp structure) 13 Bent members 14 Locking claw 15 connecting pin 17 Locking protrusion 18 Locking box (receiving device) 19 Push Button 20 Clasp body 21 Back side 30 Slide member 31 Connecting part 32 Slide member side engagement portion 33 Engagement site 40 Operating member 41 Operation section 42 mounting holes 44 Connection 45 Operation member side engagement part 46 Engagement ramp 50 biasing member 60 bands

Claims

1. A clasp for a band that is located between two bands and opens and closes when attaching or detaching the band. a slide member that is connected to one end of the band and slides in the longitudinal direction of the band within the clasp body; an operating member that locks the slide member within the clasp body; a biasing member that biases the operating member in a thickness direction within the clasp body, The operating member has an operating portion that is exposed on the back side of the clasp body and that can press the operating member, which is biased by the biasing member, toward the opposite biasing side, and an operating member-side engaging portion that is linked to the operating portion and engages with the slide member, The slide member has a slide member side engaging portion that has two or more engaging portions that are engaged with the operating member side engaging portion and are provided consecutively in the band longitudinal direction, The operating member side engagement portion of the operating member biased by the biasing member engages with one of the engagement portions of the slide member side engagement portion to fix the slide member within the clasp body, and the operating member side engagement portion is pressed to release the engagement, thereby providing a fine adjustment function that allows the position of the slide member to be adjusted.

2. 2. The clasp structure for a band according to claim 1, wherein the operating member side engaging portion has an engaging inclined surface inclined in the biasing direction of the biasing member, and the sliding member side engaging portion has an inclined engaging portion corresponding to the engaging inclined surface.

3. 3. A clasp structure for a band according to claim 1, wherein a locking claw is provided on a folding member that is connected to the other end of the band and that closes the clasp by bending it toward the back side of the clasp body, and this locking claw is locked onto a connecting pin inside the clasp body.

4. 3. The clasp structure for a band according to claim 1, wherein a locking protrusion is provided on a folding member that is connected to the other end of the band and that closes the clasp by bending it toward the back side of the clasp body, and the locking protrusion is locked to a receiving device provided on the clasp body.

5. A watch band comprising the clasp structure for a band according to claim 1 or 2.

6. A wristwatch comprising the watch band according to claim 5.

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