Watchband, timepiece and watchband length adjusting mechanism

Abstract

The invention provides a watchband, a clock and a watchband length adjusting mechanism, which have sufficient length adjusting amplitude and are convenient to use. The watchband has: a first watchband mounted on one end side of the timepiece main body; a second watchband mounted on the other end side of the timepiece main body; and a buckle part connecting the first watchband and the second watchband, the buckle part including a cover member and an adjustment part, the adjustment part having: a pair of rail parts disposed along the inner sides of two side walls of the cover member in the longitudinal direction of the cover member and having a plurality of groove parts for adjusting the length; one end of the adjusting strap section is connected with the end part of the first watchband; a pressing part disposed on the bottom surface of the inner side of the cover member and including an elastic member; and an engagement pin that is inserted through the other end of the adjustment band section and is capable of engaging with the groove portion of the rail portion, and the pressing portion presses the engagement pin against the rail portion in a state where the engagement pin is engaged with the groove portion.

Description

[0001] This application is a divisional application of Chinese invention patent application filed on February 1, 2023, entitled "Watch Strap, Clock and Watch Strap Length Adjustment Mechanism", with application number 202310126487.7. Technical Field

[0002] This invention relates to watch straps, watches having the watch straps, and watch strap length adjustment mechanisms. Background Technology

[0003] Watch straps with length adjustment mechanisms are known. For example, Patent Document 1 proposes a watch strap capable of adjusting the total length of the strap to multiple lengths corresponding to the number of engagement slots. According to this document, guide slots and two engagement slots continuous with the guide slots are symmetrically formed on the two inner sides of the cover member, and these engagement slots engage with the two ends of a spring rod provided at the end of the end link of the watch strap. Furthermore, in the state before engagement ( Figure 2 Under these conditions, the cover component separates from the watch strap.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2003-204813 Summary of the Invention

[0005] However, the watchband in Patent Document 1 has room for improvement. For example, the length adjustment is based on a two-stage system with two locking slots, resulting in a very small adjustment range. Furthermore, before locking, the cover component is separate from the watchband, making it difficult for the average user to lock.

[0006] That is, the watch strap should have a sufficient range of length adjustment and be easy to use.

[0007] One aspect of this application includes a watch strap: a first watch strap mounted on one end of a watch body; a second watch strap mounted on the other end of the watch body; and a clasp connecting the first and second watch straps. The clasp includes a cover component and an adjustment component. The adjustment component has: a pair of track components disposed along the inner side of two side walls of the cover component in the long side direction, having a plurality of grooves for adjusting length; an adjustment band link, one end of which is connected to the end of the first watch strap; a pressing component disposed on the bottom surface of the inner side of the cover component, including an elastic member; and a locking pin inserted through the other end of the adjustment band link, capable of engaging with the grooves of the track components. When the locking pin is engaged with the grooves, the pressing component presses the locking pin against the track components.

[0008] One aspect of this application is a watch with the strap described above.

[0009] One aspect of the watch strap length adjustment mechanism of this application includes: a first watch strap mounted on one end of a watch body; a second watch strap mounted on the other end of the watch body; and a clasp connecting the first and second watch straps. The clasp includes a cover member and an adjustment member. The adjustment member has: a pair of track members disposed along the inner side of two side walls of the cover member in the long side direction, having a plurality of grooves for adjusting the length; an adjustment band link, one end of which is connected to the end of the first watch strap; a pressing part disposed on the bottom surface of the inner side of the cover member, including an elastic member; and a locking pin inserted through the other end of the adjustment band link, capable of engaging with the track members. The slot engagement mechanism of the watch strap length adjustment mechanism is configured such that: the adjustment band link rotates about the engagement pin as an axis, making the adjustment band link approximately perpendicular to the cover member, and the adjustment band link is pressed into the cover member of the watch buckle, thereby causing the elastic member to contract, the engagement pin disengages from the slot engagement, and when the engagement pin is disengaged from the slot, the engagement pin moves in the long side direction of the cover member and releases the adjustment band link at the desired watch strap length, the adjustment band link moves in the direction of separation from the cover member of the watch buckle by means of the force of the elastic member, thereby engaging the engagement pin with the slot corresponding to the desired watch strap length. Attached Figure Description

[0010] Figure 1 This is a perspective view showing an outline of the watch strap according to Embodiment 1.

[0011] Figure 2 This is the front view of the clock.

[0012] Figure 3 This is a perspective view of the adjustment mechanism with the clasp folded down.

[0013] Figure 4 This is an exploded 3D view of the adjustment section.

[0014] Figure 5 This is a perspective view of the adjustment part with the clasp extended.

[0015] Figure 6 It is a perspective 3D view of the pressing part.

[0016] Figure 7 This is a side sectional view showing the main part of the structure when the length is adjusted.

[0017] Figure 8 This is a side sectional view of the main part when folded.

[0018] Figure 9 This is a three-dimensional view of the watch strap with the clasp as the center.

[0019] Figure 10 This is a top view of the watch strap with the clasp as the center.

[0020] Figure 11 This is an exploded perspective view of the pressing part in Embodiment 2.

[0021] Figure 12 This is a side sectional view of the main part showing the state of the pressing part when unfolded.

[0022] Figure 13 It is an exploded perspective view of the pressing shell and cover.

[0023] Figure 14 It is an exploded perspective view of the pressing shell and cover.

[0024] Figure 15 This is a side sectional view showing the main part of the structure when the length is adjusted.

[0025] Figure 16 This is a side sectional view showing the main part of the structure when the length is adjusted.

[0026] Label Explanation

[0027] 2: Belt joint; 2b: End belt joint; 4: Through hole; 7: Mounting part; 8: Through hole; 10: First watch strap; 11: Connecting belt joint; 15: Second watch strap; 20; 21: Track part; 20a: Through hole; 20b: Fixing hole; 21a: Through hole; 21b: Fixing hole; 22: Adjusting belt joint; 22a: Protrusion; 22b: Protrusion; 22c: Protrusion; 23: Pressing part; 24: Pressing housing; 24a: Storage part; 25: Cover; 26: Spring; 27: Locking pin; 28: Through hole; 29: Groove; 30: Cover component; 3 0a: Side wall; 30b: Side wall; 31: Middle plate; 32: Lower plate; 33: Button; 35: Watch buckle; 36: Cutout; 37: Storage part; 41: Latch; 47: Storage part; 50: Adjustment part; 66: Second surface; 68: Long hole; 72: Adjustment belt link; 72b: Protrusion; 72c: Protrusion; 73: Pressing part; 74: Pressing housing; 74a: Storage part; 74b: Long hole; 75: Cover; 75a: Shaft; 76: First surface; 77: Mounting part; 78: Groove; 80: Adjustment part; 100: Watch strap; 150: Clock. Detailed Implementation

[0028] Implementation Method 1

[0029] ***Overview of Clock and Watch Strap**

[0030] Figure 1 This is a three-dimensional view showing the outline of the watch strap. Figure 2 This is the front view of the clock.

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the watch strap 100 consists of a first watch strap 10, a second watch strap 15, and a clasp 35 connecting the first watch strap 10 and the second watch strap 15. The clasp 35 consists of a cover component 30, a middle plate 31, and a lower plate 32. By pressing the buttons 33 provided on both sides of the cover component 30, the latch 41 is released, as shown. Figure 1 As shown, it becomes an unfolded and elongated structure.

[0033] like Figure 2 As shown, the end of the first watch strap 10 is connected to the lug 5 on the 12 o'clock side of the watch 150. Similarly, the end of the second watch strap 15 is connected to the lug 6 on the 6 o'clock side of the watch 150. Additionally, in Figure 2 In this context, the clock 150 is set as a 3-hand analog clock, but it is not limited to this. Any device worn on the wrist is acceptable, such as a digital clock or a smartwatch.

[0034] return Figure 1 .

[0035] The first watch strap 10 is composed of a plurality of linked links 2, etc. The end link 2b of the first watch strap 10 is connected to the adjustment part 50 inside the cover member 30 via the connecting link 11. The adjustment part 50 will be described later.

[0036] The second watch strap 15 is composed of multiple interconnected strap links 2, etc. The end strap link 2c of the second watch strap 15 is connected to one end of the lower plate 32. A latch 41 is provided on the lower plate 32. The other end of the lower plate 32 is connected to one end of the middle plate 31. The other end of the middle plate 31 is connected to one end of the cover member 30.

[0037] The lower plate 32 is rotatably connected to the end link 2c of the second strap 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.

[0038] Therefore, the clasp 35 is configured to switch between a state where the middle plate 31 and the lower plate 32 are folded into a Z-shape and a state where both are unfolded and extended. The cover member 30 is a buckle, and its overall shape is curved to accommodate wearing on the arm. The cover member 30 is approximately rectangular in shape when viewed from above. Figure 3The cover member 30 is configured such that its long side extends towards the direction of the first watchband 10. Furthermore, the width of the cover member 30 in the short side direction is approximately the same as the width of the first watchband 10. The middle plate 31 and the lower plate 32, in the folded state, have the same curvature as the cover member 30, following the back side of the cover member 30. In a preferred embodiment, all parts constituting the watchband 100 are made of stainless steel. However, it is not limited to stainless steel; any hard metal with excellent texture can be used, such as titanium.

[0039] ***Strap length adjustment mechanism***

[0040] Figure 3 This is a perspective view of the adjustment mechanism with the clasp folded down. Figure 4 This is an exploded 3D view of the adjustment section.

[0041] Figure 3 This is a perspective view of the clasp part 35 in the folded state, and the adjustment part 50 inside the perspective viewing cover part 30.

[0042] Here, use Figure 3 , Figure 4 The structure of the adjustment section 50 will be explained.

[0043] The adjustment unit 50 consists of a pair of track sections 20 and 21, an adjustment belt section 22, a pressing section 23, a locking pin 27, etc.

[0044] The track section 20 is a track-shaped component arranged along the side wall 30a of the cover member 30, with a through hole 20a at one end for connecting to the middle plate 31. The other end of the track section 20 has a fixing hole 20b for fixing the track section 20 relative to the side wall 30a. On the lateral side of the fixing hole 20b, four slots 29 for length adjustment are provided at equal intervals. The track section 21 is a component paired with the track section 20, arranged along the side wall 30b of the cover member 30, and has the same structure as the track section 20. Specifically, one end of the track section 21 has a through hole 21a for connecting to the middle plate 31, and the other end has a fixing hole 21b for fixing the track section 21 relative to the side wall 30b. Furthermore, the track section 21 also has four length adjustment slots 29.

[0045] The adjusting band 22 has a protrusion 22a protruding towards the first watch strap 10, two protrusions 22b branching off from the protrusion 22a, and a protrusion 22c. The protrusion 22a has a through hole 4 for connecting to the connecting band 11. The adjusting band 22 is positioned between the track section 20 and the track section 21. Furthermore, the connecting band 11, which connects the adjusting band 22 to the end band 2b of the first watch strap 10, is also configured to have approximately the same size as the adjusting band 22 and is positioned between the track section 20 and the track section 21.

[0046] The space between protrusions 22b and 22c is a storage section 37, which houses a pressing section 23. Protrusions 22b and 22c are each provided with a through hole 28 for inserting a card locking pin 27.

[0047] The pressing part 23 consists of a pressing housing 24, a cover 25, and two springs 26.

[0048] The pressing housing 24 is the rectangular main housing of the pressing part 23, having a housing part 24a for accommodating two springs 26 and a through hole 8 provided below the housing part 24a. The pressing housing 24 is arranged such that its long side faces the short side of the cover member 30. The through hole 8 is a hole for inserting the locking pin 27, and is provided along the long side of the pressing housing 24. In other words, a through hole 8 is provided on the pressing housing 24 along the short side of the cover member 30.

[0049] The cover 25 is a component that serves as a cover for the pressing housing 24, and is sized to fit into the storage portion 24a. The pressing portion 23 is constructed by placing the cover 25 with two springs 26 stored side by side in the storage portion 24a of the pressing housing 24. The cover 25 is assembled such that its upper surface abuts against the bottom surface of the inner side of the cover component 30.

[0050] Spring 26 is an elastic component; in a preferred embodiment, a conical spring is used. The material of spring 26 is, for example, piano wire. Alternatively, any material capable of providing the necessary spring force can be used, such as hard steel wire or stainless steel wire. By using a conical spring, the compression height can be reduced compared to a typical coil spring, thus allowing for a more compact configuration of the pressing part 23 and the adjusting part 50.

[0051] With the pressing part 23 housed in the housing part 37 of the adjusting band 22, the locking pin 27 is inserted through the through hole 28 of the protrusion 22b, the through hole 8 of the pressing housing 24, and the through hole 28 of the protrusion 22c, thereby integrating the pressing part 23 with the adjusting band 22.

[0052] exist Figure 3 In the folded state shown, the locking pin 27 engages with the innermost slot 29 among the four length adjustment slots 29, which minimizes the length of the watch strap. At this time, the locking pin 27 is pressed towards the slot 29 by the pressing part 23.

[0053] In other words, the adjustment part 50 has: a pair of track parts 20, 21, which are arranged along the inner side of the two side walls 30a, 30b of the cover part 30 in the long side direction and have a plurality of grooves 29 for adjusting the length; an adjustment band 22, one end of which is connected to the end of the first watch strap 10; a pressing part 23, which is arranged on the bottom surface of the inner side of the cover part 30 and includes a spring 26 as an elastic member; and a locking pin 27, which is inserted through the other end of the adjustment band 22 and can engage with the grooves 29 of the track parts 20, 21. When the locking pin 27 is engaged with the grooves 29, the pressing part 23 presses the locking pin 27 against the track parts 20, 21. In addition, the adjusting band 22 has a receiving portion 37 for receiving the pressing housing 24. When the pressing housing 24 is placed in the receiving portion 37, the locking pin 27 is inserted through the through hole 28 of the adjusting band 22 and the through hole 8 of the pressing housing 24.

[0054] Figure 5 This is a perspective three-dimensional view of the adjustment part with the clasp unfolded, and... Figure 3 correspond. Figure 6 It is a perspective 3D view of the pressing part.

[0055] Figure 5 This is a perspective view of the adjustment section 50 with the clasp 35 unfolded, showing the adjustment band 22 upright relative to the cover member 30. Furthermore, the adjustment band 22 is configured to be upright about the locking pin 27 as its rotation axis. Figure 5 As shown, even when the clasp 35 is unfolded, the locking pin 27 is pressed into the groove 29 by the pressing part 23, and is therefore fixed in the groove 29 at the shortest position of the four-level watch strap length. Figure 6 The pressing part 23 is shown to press the locking pin 27. The bottom surface of the storage part 24a is pressed down by the restoring force of the two springs 26, which presses the locking pin 27 that is inserted through the through hole 28.

[0056] When adjusting the length of the watch strap, with the clasp extended by 35 degrees, as follows: Figure 5 As shown by the hollow arrow, the adjustment belt 22 is pressed into the cover component 30.

[0057] ***How ​​to adjust the watch strap length***

[0058] Figure 7 This is a side sectional view showing the main part of the structure when the length is adjusted. Figure 8 This is a side sectional view of the main part when folded.

[0059] like Figure 7As shown, when the adjusting band 22 is pressed into the cover member 30, the two springs 26 inside the pressing part 23 are compressed, and the locking pin 27 disengages from the groove 29 and becomes slidable. Here, when the adjusting band 22 is pressed in, and the locking pin 27 is moved to the desired length position of the groove 29 among the four grooves 29 and the adjusting band 22 is released, the locking pin 27 engages with the groove 29. Figure 8 The image shows the state of the watch buckle 35 folded after length adjustment of the innermost slot 29 among the four slots 29. It can be seen that at the adjusted position, the locking pin 27 is pressed against the selected slot 29 by the pressing part 23.

[0060] In addition, such as Figure 8 As shown, the thickness t from the center of the through hole 28 of the adjusting band 22 to the upper surface of the adjusting band 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 in the groove 29. In other words, with the adjusting band 22 housed in the cover member 30, the upper surface of the adjusting band 22, which is the side facing the cover member 30, is set to abut against the cover member 30. Thus, in the folded state of the buckle portion 35, the upper surface of the adjusting band 22 becomes a stop, preventing the engaging pin 27 from disengaging from the groove 29.

[0061] Figure 9 This is a three-dimensional view of the watch strap with the clasp as the center. Figure 10 This is a top view of the watch strap with the clasp as the center.

[0062] Figure 9 This is a three-dimensional view of the watch strap 100, centered on the clasp 35. (For example...) Figure 9 As shown, the side wall 30a of the cover member 30 is provided with a cutout 36. Specifically, the side wall 30a near the first strap 10 is provided with a cutout 36. The side wall 30b is also provided with a cutout 36. The length of the cutout 36 is approximately the same as the adjustment length of the four slots 29, and in a preferred embodiment, it is set to be slightly longer than the width of the end strap link 2b of the first strap 10. In addition, the length of the end strap link 2b in the long side direction of the cover member 30 is taken as the width of the end strap link 2b.

[0063] Furthermore, the length L1 of the end band 2b is set to be approximately the same as the width of the cover member 30 in the short side direction. In addition, the length L2 of the end band 2c of the second strap 15 is also set to be approximately the same as the width of the cover member 30 in the short side direction.

[0064] Figure 9 , Figure 10 This shows the appearance of the watch strap 100 when the strap length adjustment is set to the longest of the four levels. (As shown) Figure 10As shown, when viewed from above, the sides of the first strap 10, the cover member 30, and the second strap 15 exhibit no stepped differences, forming a continuous profile. Furthermore, as... Figure 3 As shown, even when the watch strap length is adjusted to its shortest setting, the end link 2b of the first watch strap 10 is neatly concealed within the cutout 36. When viewed from above, it appears aesthetically pleasing. Figure 10 Similarly, it achieves a continuous appearance without any step differences on the sides.

[0065] In other words, the first watch strap 10 is composed of multiple strap segments 2, including the end strap segment 2b. The width of the cover component 30 in the short side direction is approximately the same as the length L1 of the end strap segment 2b. The two sidewalls 30a and 30b of the cover component 30 near the first watch strap 10 are provided with cutouts 36.

[0066] In other words, the strap length adjustment mechanism of the buckle 35, including the adjustment part 50, is configured such that the adjustment link 22 rotates about the locking pin 27 as an axis, so that the adjustment link 22 is approximately perpendicular to the cover member 30. The adjustment link 22 is pressed into the cover member 30, thereby causing the spring 26 to contract. The locking pin 27 disengages from the slot 29. With the locking pin 27 disengaged from the slot 29, the locking pin 27 is moved in the long side direction of the cover member 30 and the adjustment link 22 is released at the desired strap length. The adjustment link 22 moves in the direction of separation from the cover member 30 by means of the restoring force of the spring 26, thereby engaging the locking pin 27 into the slot 29 corresponding to the desired strap length.

[0067] As described above, the watch strap 100 according to this embodiment can achieve the following effects.

[0068] The watch strap 100 has a first strap 10 mounted on one end of the watch body 150, a second strap 15 mounted on the other end of the watch 150, and a clasp 35 connecting the first strap 10 and the second strap 15. The clasp 35 includes a cover member 30 and an adjustment part 50. The adjustment part 50 has a pair of track parts 20, 21, which are arranged along the inner side of the two side walls 30a, 30b of the cover member 30 in the long side direction. Multiple slots 29 for adjusting length; an adjusting band 22, one end of which is connected to the end of the first watchband 10; a pressing part 23 disposed on the bottom surface inside the cover member 30, including a spring 26 as an elastic member; and a locking pin 27 inserted through the other end of the adjusting band 22, which can engage with the slots 29 of the track parts 20 and 21. When the locking pin 27 is engaged with the slots 29, the pressing part 23 presses the locking pin 27 against the track parts 20 and 21.

[0069] According to this structure, when changing the length of the watch band 100, the adjusting link 22 is raised, and the pressing part 23 is pressed down using the adjusting link 22, thereby disengaging the locking pin 27 from the slot 29 and allowing it to move to other slots 29. Furthermore, the length adjustment range has four levels, providing a wide adjustment range. In addition, unlike conventional watch bands where the cover component and the watch band are separate and therefore require engagement during length adjustment, the length can be adjusted simply by raising and pressing the adjusting link 22 while the cover component 30 is connected to the first watch band 10.

[0070] Therefore, a watch strap 100 with a sufficient range of length adjustment and ease of use can be provided. Furthermore, a watch 150 that allows for easy length adjustment of the watch strap can be provided.

[0071] In addition, the pressing part 23 has a cover 25 that abuts against the bottom surface of the cover member 30, a pressing housing 24 that is paired with the cover 25, and a spring 26 that is disposed between the cover 25 and the pressing housing 24 as an elastic member. The pressing housing 24 is provided with a through hole 8 along the short side direction of the cover member 30. The adjusting band 22 has a receiving part 37 for receiving the pressing housing 24. When the pressing housing 24 is placed in the receiving part 37, the locking pin 27 is inserted through the through holes 8 and 28 of the adjusting band 22 and the pressing housing 24.

[0072] Therefore, the pressing part 23 can be compactly constructed with a simple structure in which a spring 26 is provided between the pressing housing 24 and the cover 25. Moreover, since the pressing part 23 is housed in the housing part 37 of the adjusting band 22, the structure of the adjusting part 50 also becomes compact, and it can be constructed with dimensions that can be housed inside the cover member 30.

[0073] Therefore, since the structure of the buckle 35, including the cover part 30, can also be made compact, a convenient watch strap 100 can be provided.

[0074] In addition, the thickness of the adjustment band 22 is set to be approximately the same as the height of the side walls 30a and 30b of the cover member 30. When the adjustment band 22 is housed in the cover member 30, the upper surface of the adjustment band 22 on the side of the cover member 30 abuts against the cover member 30.

[0075] Therefore, with the buckle portion 35 folded, the upper surface of the adjustment link 22 acts as a stop, preventing the locking pin 27 from disengaging from the groove portion 29. In other words, it prevents unintentional length adjustment.

[0076] Therefore, a convenient watch strap 100 can be provided.

[0077] In addition, the adjustment link 22 is connected to the end link 2b of the first watch strap 10 via the connecting link 11. The first watch strap 10 is composed of multiple links 2, including the end link 2b. The width of the cover member 30 in the short side direction is approximately the same as the length L1 of the end link 2b. The two side walls 30a and 30b of the cover member 30 near the first watch strap 10 are provided with cutouts 36.

[0078] Therefore, when viewing the connection between the cover component 30 and the first watch strap 10 from the outside, the width of the cover component 30 and the first watch strap 10 is approximately the same regardless of the length adjustment, thus creating a continuous appearance without any step difference on the side.

[0079] Therefore, it is possible to provide a watch strap 100 with excellent aesthetics.

[0080] In addition, there are four slots 29 at the track sections 20 and 21.

[0081] Therefore, unlike existing technologies that only have two levels of adjustment, it is able to perform four levels of length adjustment.

[0082] Therefore, a watch strap 100 with sufficient length adjustment range can be provided.

[0083] In addition, the elastic component is spring 26, which is made of a conical spring.

[0084] Compared to cylindrical springs and leaf springs, conical springs can achieve a shorter stroke to obtain the same load and have higher durability. Furthermore, their volume during compression is smaller. Therefore, the pressing part 23 can be compactly constructed.

[0085] Therefore, it is possible to provide a small and easy-to-use watch strap 100.

[0086] Implementation Method 2

[0087] ***Different structures of the pressing part**

[0088] Figure 11 This is an exploded perspective view of the pressing part in Embodiment 2, and... Figure 4 correspond. Figure 12 This is a side sectional view of the main part showing the state of the pressing part when unfolded, and... Figure 5 correspond.

[0089] In the above embodiment, when the watch strap 100 is unfolded, as... Figure 5 As shown, there is a possibility that the adjustment belt 22 may stand up, but an anti-standing mechanism can also be provided. In detail, in the adjustment section 80 of this embodiment, an anti-standing mechanism is provided in the adjustment belt 72 and the pressing section 73 to prevent the adjustment belt 72 from standing up when it is unfolded.

[0090] like Figure 11 As shown, the adjustment section 80 consists of a pair of track sections 20 and 21, an adjustment belt section 72, a pressing section 73, and a locking pin 27. The structure of the adjustment belt section 72 and the pressing section 73 in this embodiment differs from that in Embodiment 1. Hereinafter, the same reference numerals will be used for the same parts as in the above embodiment, and repeated descriptions will be omitted.

[0091] The structure of the adjustment band 72 on the side near the pressing part 73 differs from that of the adjustment band 22 in Embodiment 1. Specifically, on the opposite side of the protrusion 22a, there are two branched protrusions 72b and 72c, but the portion abutting against the pressing part 73 is lowered by one step. This lowered portion at the protrusions 72b and 72c is referred to as the first surface 76. The protrusions 72b and 72c are provided with through holes 28.

[0092] Figure 13 , Figure 14 It is an exploded perspective view of the pressing shell and cover. Additionally, in Figure 13 , 14 The illustration of spring 26 is omitted in the text.

[0093] The pressing part 73 consists of a pressing housing 74, a cover 75, and two springs 26.

[0094] like Figure 13 As shown, the press-fit housing 74 has two springs 26 and a receiving portion 74a for receiving a part of the cover 75. The receiving portion 74a has an elongated guide hole, i.e., an elongated hole 74b. Furthermore, as... Figure 14 As shown, a bottom surface 65, descending one step from the base portion of the pressing housing 74, is provided on the back side of the storage section 74a. A groove 78 is provided on the bottom surface 65 to engage with the locking pin 27. Furthermore, an island-shaped protrusion with the bottom surface 65 is housed in the adjusting belt section 72. Figure 11 The storage section 47 is located between the two protrusions 72b and 72c of the bottom surface 65. Furthermore, second surfaces 66, one step lower than the bottom surface 65, are provided on both sides of the bottom surface 65. The two second surfaces 66 are connected to the adjustment belt 72 ( Figure 11 The two parts corresponding to the first face 76.

[0095] like Figure 14As shown, the cover 75 is provided with two mounting portions 77 for holding two springs 26 and a shaft 75a between the two mounting portions 77. The shaft 75a is a protrusion erected from the base of the cover 75, and its planar shape is oblong. An elongated hole 68 is provided on the side of the shaft 75a for inserting a locking pin 27. Furthermore, the shaft 75a is inserted through the elongated hole 74b of the pressing housing 74, and in the inserted state, the locking pin 27 is inserted through the elongated hole 68 of the shaft 75a. The length of the elongated hole 68 is set to the length by which the spring 26 can extend and retract when the locking pin 27 is inserted. When the pressing housing 74 moves up and down with the extension and retraction of the spring 26, the shaft 75a acts as a guide to ensure smooth movement of the pressing housing 74.

[0096] With the two springs 26 placed on the two mounting portions 77 of the cover 75, the cover 75 and the pressing housing 74 are combined to form the pressing portion 73. Then, as follows... Figure 11 As shown, the pressing part 73 is placed in the storage part 47 of the adjusting band 72. Then, with the pressing part 73 stored in the storage part 47 of the adjusting band 72, the locking pin 27 is inserted through the through hole 28 of the protrusion 72b, the elongated hole 68 of the shaft 75a, and the through hole 28 of the protrusion 72c, thereby integrating the pressing part 73 with the adjusting band 72.

[0097] Figure 12 This is a side view of the main part of the watch strap 100 with the adjustment section 80 when unfolded.

[0098] like Figure 12 As shown, when unfolded, the adjusting band 72 does not stand up but is retracted into the cover component 30. This is because, by applying force to the direction that separates the cover 75 from the pressing housing 74 via the spring 26, the second surface 66 of the pressing housing 74, which serves as the pressure part, presses the first surface 76 of the protrusions 72b and 72c of the adjusting band 72, thereby using the lever principle to press the end of the adjusting band 72 on the side of the connecting band 11 toward the cover component 30. In other words, this is because the second surface 66 of the pressing housing 74, which serves as the pressure part, the first surface 76 of the adjusting band 72, and the linkage mechanism function as an anti-standing mechanism.

[0099] In other words, the cover 75 is provided with a shaft 75a having an elongated hole 68, and the pressing housing 74 is provided with a second surface 66, which serves as a pressure part, for pressing the adjusting belt 72 toward the track parts 20 and 21, and an elongated hole 74b for the shaft 75a to be inserted through. The adjusting belt 72 has a receiving part 47 for receiving a portion of the pressing housing 74 and a through hole 28 provided along the short side direction of the cover member 30. When a portion of the pressing housing 74 is placed in the receiving part 47, the locking pin 27 is inserted through the through hole 28 of the adjusting belt 72 and the elongated hole 68 of the shaft 75a.

[0100] ***How ​​to adjust the watch strap length***

[0101] Figure 15 , Figure 16 This is a side sectional view showing the main part of the structure when the length is adjusted.

[0102] like Figure 15 As shown, when adjusting the length of the watch strap 100, in the unfolded state, the first watch strap 10 is stretched downwards towards the cover member 30. When the stretching force exceeds the pressing force of the pressing part 73, the ends of the protrusions 72b and 72c of the adjusting link 72 are pressed down by prying the second surface 66 of the pressing housing 74, and the adjusting link 72 stands up.

[0103] With the adjustment belt 72 upright, when the adjustment belt 72 is pressed into the cover component 30, the two springs 26 inside the pressing part 73 are compressed, such as... Figure 16 As shown, the locking pin 27 disengages from the slot 29 and becomes slidable. Here, with the adjusting band 72 pressed in, when the locking pin 27 is moved to the desired length position of the slot 29 in the four slots 29 and the adjusting band 72 is released, the locking pin 27 engages with the slot 29.

[0104] As described above, the watch strap 100 with adjustment section 80 according to this embodiment can achieve the following effects.

[0105] In the watch strap 100, the pressing part 73 has: a cover 75 that abuts against the bottom surface of the cover member 30; a pressing housing 74 that is paired with the cover 75; and a spring 26 that is an elastic member disposed between the cover 75 and the pressing housing 74. The cover 75 is provided with a shaft 75a having an elongated hole 68. The pressing housing 74 is provided with a second surface 66 that is a pressing part that presses the adjustment band 72 toward the track part 20, 21, and an elongated hole 74b through which the shaft 75a is inserted. The adjustment band 72 has a receiving part 47 that receives a part of the pressing housing 74 and a through hole 28 that is provided along the short side of the cover member 30. When a part of the pressing housing 74 is placed in the receiving part 47, a locking pin 27 is inserted through the through hole 28 of the adjustment band 72 and the elongated hole 68 of the shaft 75a.

[0106] Thus, the pressing part 73 is configured in a simple and compact way by providing two springs 26 between the cover body 75 and the pressing housing 74. Moreover, since a part of the pressing housing 74 is housed in the housing part 47 of the adjusting band 72, the structure of the adjusting part 80 also becomes compact, and it can be configured to be housed inside the cover member 30.

[0107] Furthermore, the pressing housing 74 has a second surface 66 that functions as a pressure-applying part. By pressing the first surface 76 of the adjusting band 72 with the second surface 66, the end of the adjusting band 72 on the side of the connecting band 11 can be pressed against the cover member 30 using the lever principle. Thus, since the second surface 66, as a pressure-applying part, functions as a locking mechanism, the adjusting band 72 can be prevented from sagging when the clasp 35 is opened or closed. In addition, when the clasp 35 is unfolded and worn on the arm, the opening of the watch strap becomes larger, making it easier to wear.

[0108] Therefore, it is possible to provide a convenient watch strap.

[0109] In addition, by inserting the locking pin 27 through the hole, the cover 75, the pressing housing 74, and the adjusting belt 72 can be integrated into one unit, thus ensuring good assemblability during manufacturing.

Claims

1. A watchband, wherein the watchband has: a first watchband mounted to one end side of a timepiece main body; a second watchband mounted to the other end side of the timepiece main body; and a clasp portion connecting the first watchband and the second watchband, the clasp portion includes a cover member and an adjustment portion, the adjustment portion has: a pair of rail portions disposed along the inner sides of the two side walls of the cover member in the long side direction of the cover member, having a plurality of groove portions for adjusting the length; an adjustment band piece having one end joined to the end portion of the first watchband; a pressing portion disposed on the bottom surface of the inner side of the cover member, including an elastic member; and a fitting pin inserted through the other end of the adjustment band piece, capable of fitting with the groove portions of the rail portions, in a state where the fitting pin is fitted with the groove portions, the pressing portion presses the fitting pin against the rail portions, in a state where the adjustment band piece is at a right angle to the cover member, the fitting pin is capable of moving from one groove portion to another groove portion among the plurality of groove portions.

2. The watchband according to claim 1, wherein the pressing portion has: a cover body abutting against the bottom surface of the cover member; a pressing housing paired with the cover body; and the elastic member disposed between the cover body and the pressing housing, a through hole is provided in the pressing housing in the short side direction of the cover member, the adjustment band piece has a receiving portion that receives the pressing housing, in a state where the pressing housing is placed in the receiving portion, the fitting pin is inserted through the adjustment band piece and the through hole of the pressing housing.

3. The watchband according to claim 1, wherein the pressing portion has: a cover body abutting against the bottom surface of the cover member; a pressing housing paired with the cover body; and the elastic member disposed between the cover body and the pressing housing, the cover body is provided with a protruding portion having an elongated hole, the pressing housing is provided with a pressing portion that presses the adjustment band piece toward the rail portion side, and a guide hole into which the protruding portion is inserted through, the adjustment band piece has a receiving portion that receives a portion of the pressing housing, and a through hole provided in the short side direction of the cover member, in a state where a portion of the pressing housing is placed in the receiving portion, the fitting pin is inserted through the through hole of the adjustment band piece and the elongated hole of the protruding portion.

4. The watchband according to any one of claims 1 to 3, wherein in a state where the adjustment band piece is received in the cover member, the upper surface of the adjustment band piece, which is a surface on the side of the cover member, abuts against the cover member.

5. The watchband according to claim 2 or 3, wherein the adjustment band piece is joined to an end band piece of the first watchband via a joining band piece, the first watchband is composed of a plurality of band pieces including the end band piece, the width of the cover member in the short side direction is substantially the same as the length of the end band piece in the short side direction, the two side walls of the cover member on the side of the first watchband are provided with cutout portions.

6. The watchband according to any one of claims 1 to 3, wherein the groove portions at the rail portions are provided at 4 places.

7. The watchband according to any one of claims 1 to 3, wherein the elastic member is a conical spring.

8. A timepiece having the watchband according to any one of claims 1 to 7.

9. A watchband length adjustment mechanism, wherein the watchband length adjustment mechanism has: a first watchband mounted to one end side of a timepiece main body; a second watchband mounted to the other end side of the timepiece main body; and a clasp portion connecting the first watchband and the second watchband, the clasp portion includes a cover member and an adjustment portion, the adjustment portion has: a pair of rail portions disposed along the inner sides of the two side walls of the cover member in the long side direction of the cover member, having a plurality of groove portions for length adjustment; an adjustment band piece having one end joined to the end portion of the first watchband; a pressing portion disposed on the bottom surface of the inner side of the cover member, including an elastic member; and a fitting pin inserted through the other end of the adjustment band piece, capable of fitting with the groove portions of the rail portions, the watchband length adjustment mechanism is configured so that: the adjustment band piece is rotated about the fitting pin so that the adjustment band piece is approximately at right angles to the cover member, and the adjustment band piece is pressed toward the cover member of the clasp portion, thereby causing the elastic member to contract, and the fitting pin to disengage from the fitting with the groove portions, when the fitting pin is disengaged from the groove portions, and the fitting pin is moved in the long side direction of the cover member to release the adjustment band piece at the desired watchband length, the adjustment band piece is moved in the direction away from the cover member of the clasp portion by the force of the elastic member, thereby causing the fitting pin to fit into the groove portions corresponding to the desired watchband length.

10. A watchband, wherein the watchband has: a first watchband mounted to one end side of a timepiece main body; a second watchband mounted to the other end side of the timepiece main body; and a clasp portion connecting the first watchband and the second watchband, the clasp portion includes a cover member and an adjustment portion, the adjustment portion has: a pair of rail portions disposed along the inner sides of the two side walls of the cover member in the long side direction of the cover member, having a plurality of groove portions for length adjustment; an adjustment band piece having one end joined to the end portion of the first watchband; a pressing portion disposed on the bottom surface of the inner side of the cover member, including an elastic member; and a fitting pin inserted through the other end of the adjustment band piece, capable of fitting with the groove portions of the rail portions, in the state where the fitting pin is fitted with the groove portions, the pressing portion presses the fitting pin against the rail portions, the pressing portion has: a cover body abutting against the bottom surface of the cover member; a pressing housing paired with the cover body; and the elastic member disposed between the cover body and the pressing housing, a through hole is provided in the pressing housing in the short side direction of the cover member, the adjustment band piece has a receiving portion receiving the pressing housing, In a state where the pressing case is placed in the housing portion, the engagement pin is inserted through the through-hole of the pressing case and the long hole of the protrusion portion of the cap.

11. A watchband, wherein The watchband has: a first band mounted to one end side of a timepiece main body; a second band mounted to the other end side of the timepiece main body; and a clasp portion connecting the first band and the second band, The clasp portion includes a cover member and an adjustment portion, The adjustment portion has: a pair of rail portions disposed along the inner sides of the two side walls of the cover member in the long side direction of the cover member, having a plurality of groove portions for adjusting the length; an adjustment band link having one end connected to the end portion of the first band; a pressing portion disposed on the bottom surface of the inner side of the cover member, including an elastic member; and an engagement pin inserted through the other end of the adjustment band link, capable of engaging with the groove portions of the rail portions, In a state where the engagement pin engages with the groove portions, the pressing portion presses the engagement pin against the rail portions, The pressing portion has: a cap abutting against the bottom surface of the cover member; a pressing case paired with the cap; and the elastic member disposed between the cap and the pressing case, The cap is provided with a protrusion portion having a long hole, The pressing case is provided with a pressing portion pressing the adjustment band link toward the rail portions and a guide hole through which the protrusion portion is inserted, The adjustment band link has a housing portion housing a portion of the pressing case and a through-hole provided in the short side direction of the cover member, In a state where a portion of the pressing case is placed in the housing portion, the engagement pin is inserted through the through-hole of the adjustment band link and the long hole of the protrusion portion.

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