Watch clasp, watch band assembly and wearable device

Abstract

Provided are a watch clasp, a watch band assembly and a wearable device. The present application relates to the technical field of electronic devices. The watch clasp comprises a shell and a movable plate, wherein the movable plate can move in an extension direction of a watch band so as to drive the watch band to move. In addition, the watch clasp further comprises a structure for adjusting the tightness of the watch band, wherein the structure may comprise an elastic member, a sliding block and a track column, an annular track groove being provided in the sliding block, and the track column being slidably arranged in the track groove. The track column can slide between an extended position and a retracted position along an annular track of the track groove, to drive the sliding block to move in a direction intersecting with the extension direction of the watch band so as to adjust the tightness of the watch band. The track column slides in a single direction in the track groove, so as to extend or shorten the watch band.

Description

Buckles, strap components and wearable devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 12, 2024, with application number 202410051395.1 and invention name “Watch buckle, watch strap assembly and wearable device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic devices, and in particular to a wearable device, a strap assembly that can be used in the wearable device, and a buckle that can be used in the strap assembly. Background Art

[0003] Wearable devices generally refer to miniature electronic devices that can be worn on the body for activities, and primarily include smart watches and smart bracelets. Smart watches and smart bracelets can be used independently or as portable accessories for mobile devices.

[0004] Currently, most wearable devices have adjustable strap lengths, but they still cannot precisely fit the wrist and provide an optimal wearing experience.

[0005] Summary of the Invention

[0006] The present application provides a wearable device, a watchband assembly that can be used in the wearable device, and a watch buckle that can be used in the watchband assembly. The purpose is to provide a structure that can fine-tune the length of the watchband to accurately fit the wrist.

[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0008] In a first aspect, the present application provides a clasp that can be used in a wearable device, for example, the clasp is used to connect a strap of a wearable device.

[0009] The clasp provided in the present application includes: a shell and a movable plate; the movable plate is arranged on the shell, the movable plate is used to connect with the watch strap, and the movable plate can move along the extension direction of the watch strap to drive the watch strap to move together.

[0010] In order to fine-tune the length of the watch strap; the clasp may also include an elastic member, a slider and a track post, one of the slider and the track post is arranged on the shell, and the other is arranged on the movable plate. For example, the slider is slidably arranged on the movable plate, and the track post is fixed on the shell; the slider has an annular track groove, and the track post is slidably arranged in the track groove, that is, it can move along the annular track of the track groove; the elastic member connects the shell and the movable plate.

[0011] The track post can slide along the annular track of the track groove between a first fixed position and a second fixed position, driving the slider to move in a direction intersecting the extension direction of the watchband to adjust the tightness of the watchband. The elastic member is used to apply elastic forces in directions away from each other to the movable plate and the housing, thereby maintaining the track post in the first fixed position and the second fixed position. For example, when the track post slides along the track groove, it can abut against the wall surface of the track groove, causing the slider to move in a direction intersecting the extension direction of the watchband, prompting the track post to continue sliding along the annular track of the track groove, thereby allowing the track post to reciprocate between the first fixed position and the second fixed position to achieve contraction and extension of the watchband.

[0012] For example, when the movable plate is pushed toward the inside of the shell, the track column slides along the track groove and can slide from the first fixed position (such as the extended position) to the second fixed position (such as the retracted position). When the external force is removed, the elastic member is used to apply an elastic force to the movable plate in the direction of the watch strap, so that the movable plate can be kept in the retracted position, thereby achieving retraction of the watch strap; if the movable plate is pushed toward the inside of the shell again, the track column continues to slide along the track groove and can slide from the second fixed position (such as the retracted position) to the first fixed position (such as the extended position). When the external force is removed, the elastic member is used to apply an elastic force to the movable plate in the direction of the watch strap, so that the movable plate can be kept in the extended position, thereby achieving retraction of the watch strap.

[0013] In one possible implementation, when the watch strap is tightened, the movable plate and the shell approach each other, the track post slides from the first fixed position to the first temporary position along the track groove, and under the elastic force of the elastic member, the track post slides from the first temporary position to the second fixed position along the track groove; in the extension direction of the watch strap, the second fixed position is located between the first fixed position and the first temporary position; in the width direction of the watch strap, the first temporary position is located between the first fixed position and the second fixed position.

[0014] The track post of the example of the present application slides from the first fixed position to the first temporary position, which can guide the track post to slide to the second fixed position under the elastic force of the elastic member.

[0015] In one achievable manner, the track of the track column sliding from the first fixed position to the first temporary position includes: a track along the first direction and a track along the width direction of the strap, the first direction being the direction in which the movable plate and the housing approach each other.

[0016] In some examples, the trajectory groove from the first fixed position to the first temporary position may be inclined, including a trajectory component along the length direction of the watchband and a trajectory component along the width direction of the watchband.

[0017] In some other examples, the tracking groove from the first fixed position to the first temporary position includes a tracking groove parallel to the length direction of the strap and a tracking groove intersecting with the tracking groove.

[0018] In one achievable manner, the trajectory of the track column sliding from the first temporary position to the second fixed position includes: a trajectory along the second direction and a trajectory along the width direction of the strap, and the second direction is the direction in which the movable plate and the housing move away from each other.

[0019] In one possible implementation, when the watch strap is relaxed, the movable plate and the shell approach each other, and the track column slides from the second fixed position to the second temporary position along the track groove. Under the elastic force of the elastic member, the movable plate and the shell move away from each other, and the track column slides from the second temporary position to the first fixed position along the track groove; in the extension direction of the watch strap, the second fixed position is located between the first fixed position and the second temporary position; in the width direction of the watch strap, the second fixed position is located between the first fixed position and the second temporary position.

[0020] The track post of the example of the present application slides from the second fixed position to the second temporary position, which can guide the track post to slide to the first fixed position under the elastic force of the elastic member.

[0021] In one achievable manner, the track of the track column sliding from the second fixed position to the second temporary position includes: a track along the first direction and a track along the width direction of the strap, the first direction being the direction in which the movable plate and the housing approach each other.

[0022] In some examples, the trajectory groove from the second fixed position to the second temporary position may be inclined, including a trajectory component along the length direction of the watchband and a trajectory component along the width direction of the watchband.

[0023] In some other examples, the tracking groove from the second fixed position to the second temporary position includes a tracking groove parallel to the length direction of the strap and a tracking groove intersecting with the tracking groove.

[0024] In one achievable manner, the trajectory of the track column sliding from the second temporary position to the first fixed position includes: a trajectory along the second direction and a trajectory along the width direction of the strap, and the second direction is the direction in which the movable plate and the housing move away from each other.

[0025] In one implementation, in the width direction of the strap, the second fixed position is located between the first temporary position and the second temporary position.

[0026] In one possible implementation, the trajectory of the track post sliding from the first fixed position to the first temporary position includes a first track segment along the width of the strap, and the trajectory of the track post sliding from the second temporary position to the first fixed position includes a second track segment along the width of the strap, and the first track segment and the second track segment are directed in opposite directions.

[0027] In this way, the track column can be slid back and forth between the first fixed position and the second fixed position.

[0028] In one possible implementation, when the watch strap is tightened and the track post slides along the track groove from the first fixed position to the second fixed position, the slider slides along a third direction parallel to the width direction of the watch strap; when the watch strap is loosened and the track post slides along the track groove from the second fixed position to the first fixed position, the slider slides along a fourth direction opposite to the third direction.

[0029] When the track post slides along the track groove, it drives the slider to slide, causing the track post to slide between an extended position and a retracted position, thereby adjusting the strap tension. Furthermore, the slider's sliding direction when tightening the strap is opposite to the direction of the slider's sliding when loosening the strap.

[0030] In one achievable manner, when the movable plate moves along the extension direction of the watchband, the track post can slide in one direction along the annular track groove, so that the track post slides between the first fixed position and the second fixed position.

[0031] In one possible implementation, along the annular track of the track groove, the track groove includes a first track groove and a second track groove that are connected; when the track post slides along the first track groove, it can slide from the first fixed position to the second fixed position; when the track post slides along the second track groove, it can slide from the second fixed position to the first fixed position.

[0032] When the movable plate is pressed, the track post can slide unidirectionally along the circular track of the track groove. For example, by pushing the movable plate, the track post can slide along the first track segment from an extended position to a retracted position, shortening the watch strap. By pushing the movable plate again, the track post continues to slide along the second track segment connected to the first track segment, from a retracted position to an extended position, extending the watch strap. By pushing the movable plate again, the track post continues to slide along the first track segment connected to the second track segment, from an extended position to a retracted position, shortening the watch strap.

[0033] In one possible implementation, the wall surface of the slider used to form the track groove includes: a first abutment surface and a second abutment surface, both of which are facing the direction of the watch strap, and the second abutment surface is closer to the watch strap than the first abutment surface; in a first fixed position, the track column abuts against the first abutment surface; in a second fixed position, the track column abuts against the second abutment surface.

[0034] For example, when in the retracted position, the track column abuts against the first abutment surface, which can improve the stability and reliability of the device in the retracted state; similarly, when in the extended position, the track column abuts against the second abutment surface, which can improve the stability and reliability of the device in the extended state.

[0035] In one achievable manner, the track column includes a first curved surface, and either the first abutting surface or the second abutting surface includes a second curved surface; when the track column is maintained in the first fixed position or the second fixed position, the first curved surface fits against the second curved surface under the elastic force of the elastic member.

[0036] By fitting the curved surfaces together, the stability of the strap's expansion and contraction can be improved.

[0037] In one possible implementation, the slider includes a first protrusion and a second protrusion, the second protrusion surrounds the periphery of the first protrusion, and an annular track groove is formed between the first protrusion and the second protrusion; the first abutment surface is located on the wall surface of the second protrusion that forms the track groove; the second abutment surface is located on the wall surface of the first protrusion that forms the track groove.

[0038] The slider has a simple structure and is easy to implement.

[0039] In one possible implementation, the slider is slidably arranged on the movable plate, and the track column is arranged on the housing; a sliding groove for the slider to slide is opened on the movable plate, and an extending direction of the sliding groove is parallel to the width direction of the strap.

[0040] In some other implementation structures, the slider is slidably disposed on the housing, and the track column is fixed on the movable plate.

[0041] In one possible implementation, the slider includes a first side surface and a second side surface facing back to back, wherein the layout direction of the first side surface and the second side surface is parallel to the extension direction of the watch strap; and the first side surface and the second side surface are both slidably connected to the movable plate.

[0042] In one possible implementation, the elastic member includes a spring, one end of the spring is connected to the housing, and the other end is connected to the movable plate; in the first fixed position and the second fixed position, the spring is in a stretched state.

[0043] In one possible implementation, a seating groove is provided on the movable plate, and the spring is arranged in the seating groove.

[0044] The spring in this example is arranged in the receiving groove, which not only compresses the thickness of the buckle, but also has a limiting function, allowing the spring to expand and contract along its length.

[0045] In a second aspect, the present application provides a watch strap assembly, which may include a first watch strap and a clasp in any of the above-mentioned implementations, wherein a movable plate of the clasp is connected to the first watch strap.

[0046] The watch strap assembly provided in the present application, when pushing the movable plate, the track column can slide along the track groove between a first fixed position (such as an extended position) and a second fixed position (retracted position), and the elastic member applies an elastic force toward the direction of the watch strap to the movable plate, so that the movable plate can be maintained in the extended position or the retracted position, thereby achieving the extension and shortening of the watch strap.

[0047] In one possible implementation, the movable plate is rotatably connected to the first strap; the strap assembly also includes a second strap, a first plate and a second plate; one end of the first plate is fixedly connected to the shell, and the other end is rotatably connected to the second plate, the second plate is clamped to the shell, and the second plate is connected to the second strap.

[0048] In a third aspect, the present application provides a wearable device, which may be a watch or a bracelet.

[0049] The wearable device may include: a watch dial and a watch strap assembly in any of the above implementations, wherein a first watch strap of the watch strap assembly is connected to the watch dial.

[0050] Since the wearable device provided in the present application includes a strap assembly in any of the above-mentioned methods, in the clasp of the strap assembly, the movable plate is slidably connected to the shell, and during the sliding process of the movable plate, the track column in the clasp can slide along the track groove between the extended position and the contracted position, thereby fine-tuning the length of the strap. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] FIG1 is a schematic diagram of a partial structure of a wearable device provided in an embodiment of the present application;

[0052] FIG2 is a schematic diagram of a partial structure of a wearable device provided in an embodiment of the present application;

[0053] FIG3 is a schematic structural diagram of a watch buckle provided in an embodiment of the present application;

[0054] FIG4 is a schematic diagram of the structure of a structural member in a watch buckle according to an embodiment of the present application for adjusting the tightness of a watch strap;

[0055] FIG5A is a schematic diagram of a track column in a watch buckle provided in an embodiment of the present application;

[0056] FIG5B is a schematic diagram of another trajectory of the track column in the clasp provided in an embodiment of the present application;

[0057] FIG6 is a schematic diagram of another trajectory of the track column in the clasp provided in an embodiment of the present application;

[0058] FIG7 is a schematic diagram of another trajectory of the track column in the clasp provided in an embodiment of the present application;

[0059] FIG8 is a schematic structural diagram of a clasp provided in an embodiment of the present application;

[0060] FIG9 is a schematic structural diagram of a slider in a clasp provided in an embodiment of the present application;

[0061] FIG10 is an exploded schematic diagram of a clasp provided in an embodiment of the present application;

[0062] FIG11 is a schematic diagram of an exploded view of a clasp provided in an embodiment of the present application.

[0063] Reference numerals:

[0064] 101-first strap; 102-second strap;

[0065] 20-clasp; 30-holes;

[0066] 1-housing; 2-movable plate; 3-elastic member; 4-slider; 5-track groove; 6-track column; 7-slide groove;

[0067] 81 - first abutting surface; 82 - second abutting surface; 9 - seating groove; 11 - bottom plate; 12 - cover body; 31 - threaded connection piece; 41 - first protrusion; 42 - second protrusion; 51 - first plate; 52 - second plate. DETAILED DESCRIPTION

[0068] The present invention provides a wearable device, such as a smart bracelet or smart watch, which can be worn on the wrist and can display time, record time, report time, provide message notifications, detect exercise, monitor heart rate, and detect blood oxygen levels.

[0069] A wearable device mainly includes a watch strap and a watch dial. The watch strap is used to wrap around the user's wrist to enable the wearable device to be worn. The watch dial may include a display screen for displaying information.

[0070] As shown in Figure 1, a structural diagram of a watch strap is shown. The exemplary watch strap includes a first watch strap 101 and a second watch strap 102, with a dial connected between the first watch strap 101 and the second watch strap 102. For example, the dial can be connected between end A of the first watch strap 101 and end B of the second watch strap 102. The first watch strap 101 and the second watch strap 102 can be connected by a clasp 20, so that the first watch strap 101, the dial, and the second watch strap 102 form a closed loop that can be wrapped around the wrist.

[0071] In some optional embodiments, the material of the strap can be metal, ceramic, rubber, etc.

[0072] In order to fit the wrist, as shown in FIG1 , a plurality of holes 30 may be opened on the first strap 101 and the second strap 102 , and the wearer may adjust the strap length through the plurality of holes according to the thickness of the wrist.

[0073] In Figure 1, the strap length adjustment amount is at least the distance between two adjacent holes 30. This may cause the strap to be worn too loose or too tight, and it may not be able to accurately adapt to the wrist, thereby reducing the user experience and even the performance of the wearable device. For example, when the wearable device has functions such as heart rate monitoring and blood oxygen level detection, the dial cannot be close to the skin due to being worn too loose, thereby reducing the measurement accuracy.

[0074] In order to make the wearable device accurately fit the wrist, improve the user experience, and enhance the performance of the device, the wearable device of the example of this application includes a fine-tuning structure that can fine-tune the length of the strap. For example, as shown in Figure 1, the adjustment amount of the fine-tuning structure can be one-half, one-third, one-quarter, or one-fifth of the distance between two adjacent holes, or even smaller; alternatively, the adjustment amount of the fine-tuning structure can be greater than one hole distance and less than two hole distances. For example, the adjustment amount can be equal to 3 / 2 hole distances. The structure that can be achieved by the fine-tuning structure is shown below.

[0075] As shown in Figures 2 and 3, Figure 2 is a partial structural diagram of the wearable device provided in an embodiment of the present application, and Figure 3 is a structural diagram after removing part of the structure of Figure 2.

[0076] In the example of the present application, as shown in Figure 2, the clasp 20 arranged between the first strap 101 and the second strap 102 includes: a shell 1 and a movable plate 2, and the movable plate 2 is arranged on the shell 1; the movable plate 2 is connected to the strap 10, for example, the movable plate 2 can be rotatably connected to the first strap 101 as shown in Figure 1 through a rotating shaft.

[0077] As shown in FIG2 , the movable plate 2 can move along the extension direction of the strap 10 . For example, a chamber can be provided in the housing 1 , and the movable plate 2 can move in the chamber along the P direction as shown in FIG2 .

[0078] Because the movable plate 2 is connected to the watchband 10, the watchband 10 can be moved along the direction P shown in Figure 2 by the movable plate 2. For example, when the movable plate 2 moves toward the interior of the housing 1, that is, when the movable plate 2 and the housing 1 move closer to each other, the length of the watchband can be shortened. When the movable plate 2 moves toward the exterior of the housing 1, that is, when the movable plate 2 and the housing 1 move away from each other, the length of the watchband can be extended, thereby achieving fine-tuning of the watchband length.

[0079] As shown in Figure 3 , the clasp further includes a slider 4 that can move in a direction intersecting the extension direction of the watchband. For example, in the example in Figure 3 , the slider 4 can slide in a direction S that is perpendicular to the extension direction P of the watchband, that is, the slider 4 can slide along the width of the watchband. In some examples, a slide groove 7 can be provided, the extension direction of the slide groove 7 being parallel to the width of the watchband, and the slider 4 is slidably disposed in the slide groove 7.

[0080] The slider 4 has an annular track groove 5 , and the dotted line with an arrow shown in FIG3 indicates the track of the annular track groove.

[0081] As shown in FIG3 , the clasp further includes a track post 6 , which is slidably disposed in the track groove 5 .

[0082] In the example of the present application, one of the slider 4 and the track column 6 can be disposed on the housing 1, and the other can be disposed on the movable plate 2. For example, in the example of FIG3 , the slider 4 is slidably disposed on the movable plate 2, and the track column 6 is fixedly disposed on the housing 1. In other examples, the slider 4 can be slidably disposed on the housing 1, and the track column 6 can be fixedly disposed on the movable plate 2.

[0083] As shown in FIG3 , the clasp may further include an elastic member 3 connecting the housing 1 and the movable plate 2. For example, the elastic member 3 may be a spring, one end of which is fixedly connected to the movable plate 2 and the other end of which is fixedly connected to the housing 1.

[0084] The elastic member 3 is used to apply elastic force to the movable plate 2 toward the strap 10. As shown in FIG3 , the elastic member 3 can apply elastic force along the direction P1 to the movable plate 2 so that the movable plate 2 always remains in a state of moving toward the outside of the housing 1.

[0085] The elastic member 3 can also apply an elastic force to the housing 1 in a direction away from the strap 10, such as the elastic force along the direction P2 as shown in FIG3 , that is, the elastic member 3 can make the movable plate 2 and the housing 1 tend to move in directions away from each other.

[0086] As shown in the example of Figure 3, when the movable plate 2 moves along the extension direction of the strap 10, the track column 6 can slide between the contracted position and the extended position around the annular track of the track groove 5, and the track column 6 sliding along the track groove 5 can drive the slider 4 to move along the direction intersecting with the extension direction of the strap 10.

[0087] In the example of the present application, the elastic member 3 is used to apply elastic forces in directions away from each other to the movable plate 2 and the housing 1 , so that the track column 6 maintains the extended position and the retracted position.

[0088] The following, combined with Figure 4, details how the structure shown in Figure 3 achieves contraction and extension of the watchband. Figure 4 briefly illustrates the positional relationship between slider 4, track post 6, track slot 5, and slide slot 7 in different states. In the example shown in Figure 4, slider 4 is slidably mounted on movable plate 2, while track post 6 is fixedly mounted on housing 1. In Figure 4, the dotted circle indicates the motion trajectory of the track post.

[0089] 4 (a) to (e) show the principle diagram of the contraction (also known as tightening) of the strap.

[0090] As shown in FIG4(a), the track post 6 is in the first fixed position (e.g., the extended position) of the track slot 5. Because the elastic member 3 can exert an elastic force on the movable plate 2 toward the watch strap 10 and on the track post 6 away from the watch strap 10, the track post 6 in the extended position exerts a pulling force toward the right, as shown in FIG4(a), causing the track post 6 and the slider 4 to fit and squeeze each other, thereby maintaining the track post 6 in the extended position.

[0091] From (a) to (b) in Figure 4, the movable plate 2 is pushed toward the inside of the shell 1. When the shell 1 and the movable plate 2 are brought closer to each other by utilizing external thrust, the track column 6 can slide from the extended position to the A position along the first direction, that is, along the L1 direction as shown in (b) of Figure 4. After the track column 6 slides to the A position, it will continue to slide along the track groove 5 in a direction intersecting with the first direction to the first temporary position as shown in (c) of Figure 4.

[0092] When the external force is removed, under the elastic force of the elastic member 3, the track column 6 can continue to slide along the second direction opposite to the first direction to the position B as shown in (d) of Figure 4. Under the elastic force of the elastic member 3 and the action of the track column 6 on the slider 4, the slider 4 can slide downward, and the track column 6 slides from the position B shown in (d) of Figure 4 to the second fixed position (such as the retracted position) shown in (e) of Figure 4 along the direction intersecting with the second direction L2. The rightward pulling force of the elastic member 3 on the track column 6 can keep the track column 6 in the retracted position, so that the strap can be retracted.

[0093] In the example of the present application, the first direction may be understood as a direction in which the movable plate 2 and the housing 1 approach each other, and the second direction is a direction in which the movable plate 2 and the housing 1 move away from each other.

[0094] As shown in (b) to (c) of Figure 4, the track column 6 slides from position A to the first temporary position, which can play a guiding role, so that after the track column 6 slides from position A to the first temporary position, it can slide to the retracted position under the action of the elastic member.

[0095] The contraction process of the watch strap can be understood as follows: when the track column moves from the extended position to the contracted position, the movable plate 2 and the housing 1 approach each other, and the track column 6 slides in the track groove 5 along the first direction and the direction intersecting the first direction to the first temporary position. Under the elastic force of the elastic member 3, the track column 6 slides from the first temporary position along the second direction and the direction intersecting the second direction to the contracted position.

[0096] As shown in Figure 4 (a) to (e), the extended position and position A are on the same straight line, and the straight line is parallel to the extension direction of the strap. The first temporary position, position B and the retracted position are on the same side of the extended position and position A.

[0097] Along the length direction of the watchband, the second fixed position is located between the first temporary position and the first fixed position.

[0098] Along the width direction of the watchband (such as the S direction in Figure 4), the first temporary position is located between the first fixed position and the second fixed position, that is, the first temporary position and the second fixed position are spaced apart along the width direction of the watchband (such as the S direction in Figure 4). Alternatively, it can be understood that the first temporary position and the second fixed position are staggered along the width direction of the watchband. In this way, when the track post 6 is in the first temporary position, the external force is removed, and under the elastic force of the elastic member 3, the track post 6 can continue to slide rightward and then upward along the track groove until it reaches the retracted position. If the first temporary position and the second fixed position are in a straight line, the track post 6 will slide back and forth between the first temporary position and the second fixed position located in a straight line, rendering the strap length adjustment function of the device ineffective.

[0099] 4 (e) to (i) show the principle diagram of the extension (also known as relaxation) of the strap.

[0100] As shown in FIG. 4( e ), the track post 6 is in the second fixed position (eg, the retracted position) of the track slot 5 .

[0101] From (e) to (f) in Figure 4, the movable plate 2 is pushed toward the inside of the shell 1, and the external thrust is used to bring the shell 1 and the movable plate 2 closer to each other. The track column 6 can slide from the retracted position to the C position along the first direction, that is, along the L1 direction as shown in (f) of Figure 4. After the track column 6 slides to the C position, it will continue to slide along the track groove 5 in a direction intersecting with the first direction to the second temporary position shown in (g) of Figure 4.

[0102] When the external force is removed, the movable plate 2 and the shell 1 move away from each other under the elastic force of the elastic member 3, and the track column 6 can continue to slide along the second direction opposite to the first direction to the D position as shown in (h) of Figure 4. Under the elastic force of the elastic member 3 and the action of the track column 6 on the slider 4, the slider 4 can slide upward, and the track column 6 slides from the D position shown in (h) of Figure 4 to the first fixed position (such as the extended position) shown in (i) of Figure 4 along a direction intersecting with the second direction. The rightward pulling force of the elastic member 3 on the track column 6 can keep the track column 6 in the extended position, so that the strap can be extended.

[0103] As shown in (f) to (g) of Figure 4, the track column 6 slides from the C position to the second temporary position, which can play a guiding role, so that after the track column 6 slides from the C position to the second temporary position, it can slide to the extended position under the action of the elastic member.

[0104] The extension process of the watch strap can be understood as follows: when the track column moves from the retracted position to the extended position, the movable plate 2 and the housing 1 first approach each other, and the track column 6 slides in the track groove 5 along the first direction and the direction intersecting the first direction to the second temporary position. Under the elastic force of the elastic member 3, the movable plate 2 and the housing 1 move away from each other again, and the track column 6 slides from the second temporary position along the second direction and the direction intersecting the second direction to the extended position.

[0105] As shown in (e) to (i) of FIG. 4 , the second temporary position is further away from the first fixed position than the second fixed position.

[0106] In the extending direction of the watchband, the second fixed position is located between the first fixed position and the second temporary position.

[0107] The second fixed position is located between the first fixed position and the second temporary position in the width direction of the watchband. The second temporary position and the retracted position are spaced apart along the width direction of the watchband (e.g., direction S in FIG. 4 ). In other words, the second temporary position and the second fixed position are staggered along the width direction of the watchband. Thus, when the track post 6 is in the second temporary position, the external force is removed. Under the elastic force of the elastic member 3, the track post 6 can continue to slide rightward and then downward along the track groove until it reaches the extended position.

[0108] In this example, the first temporary position and the second temporary position are located on the same side of the second fixed position. By providing the first and second temporary positions with guiding functions, the track post can slide smoothly along the track groove to the corresponding retracted and extended positions under the elastic force of the elastic member after the external force is removed.

[0109] In the example of the present application, in the width direction of the strap, the second fixed position is located between the first temporary position and the second temporary position.

[0110] As shown in Figures 4(a) to 4(e), when the track column moves from the extended position to the retracted position, the slider 4 slides in a third direction parallel to the width of the watchband (direction S in Figure 4). For example, in Figures 4(d) to 4(e), the slider 4 moves downward along the slide groove 7.

[0111] As shown in Figures 4(e) to 4(i), when the track column moves from the retracted position to the extended position, the slider 4 slides in a fourth direction parallel to the width of the watchband (direction S in Figure 4 ), the fourth direction being opposite to the third direction. For example, in Figures 4(h) to 4(i), the slider 4 moves upward along the slide groove 7.

[0112] As shown in Figures 4(h) to (i), when the track post 6 slides from position D to the extended position, it slides along a direction T1 that intersects the second direction (direction L2). As shown in Figures 4(b) to (c), when the track post 6 slides from position A to the first position, it slides along a direction T2 that intersects the first direction (direction L1). Direction T1 is opposite to direction T2. ​​The track post 6 can slide unidirectionally along the annular track groove 5, thereby switching between the retracted position and the extended position.

[0113] It can be understood that in this example, when the movable plate 2 moves along the extension direction of the watchband 10, the track post 6 can slide unidirectionally along the annular track of the track groove 5, repeatedly switching between the extended position and the retracted position. In other words, the track post 6 slides in one direction (e.g., clockwise or counterclockwise) within the track groove 5 to achieve the switching between the extension and contraction of the watchband length.

[0114] When the user uses the structure shown in Figures 3 and 4 to fine-tune the length of the watchband, the user pushes down the movable plate 2 so that the movable plate 2 and the housing 1 are close to each other, thereby shortening the length of the watchband; when the user pushes down the movable plate 2 again, the movable plate 2 will rebound to extend the length of the watchband.

[0115] The watch strap fine-tuning structure of the example in this application is not only simple in structure but also simple in operation, which will significantly improve the user experience.

[0116] As shown in FIG. 5A and FIG. 5B , FIG. 5A simply shows the motion trajectory of the track column of FIG. 4 , and FIG. 5B shows another motion trajectory of the track column of the present application example.

[0117] In FIG5A , the track path of the track post 6 from the first fixed position to the first temporary position includes a first direction ( L1 ) and a direction intersecting L1 . In other examples, as shown in FIG5B , the track post 6 can slide from the first fixed position to the first temporary position along an inclined track path.

[0118] As shown in Figures 4(a) to 4(c), 5A, and 5B, the trajectory of the track post as it slides from the first fixed position to the first temporary position includes a trajectory along the first direction and a trajectory along the width of the watchband, where the first direction is the direction in which the movable plate and the housing approach each other. Alternatively, the trajectory of the track post as it slides from the first fixed position to the first temporary position can be decomposed into a trajectory component along the first direction and a trajectory component along the width of the watchband.

[0119] As shown in Figures 4(c) to 4(e), 5A, and 5B, the trajectory of the track post as it slides from the first temporary position to the second fixed position includes a trajectory along the second direction and a trajectory along the width of the watchband, where the second direction is the direction in which the movable plate and the housing move away from each other. Alternatively, the trajectory of the track post as it slides from the first fixed position to the first temporary position can be decomposed into a trajectory component along the second direction and a trajectory component along the width of the watchband.

[0120] As shown in Figures 4(e) to 4(g), 5A, and 5B, the trajectory of the track post as it slides from the second fixed position to the second temporary position includes a trajectory along the first direction and a trajectory along the width of the watchband. In other words, the trajectory of the track post as it slides from the second fixed position to the second temporary position can be decomposed into a trajectory component along the first direction and a trajectory component along the width of the watchband.

[0121] As shown in Figures 4(g) to 4(i), 5A, and 5B, the trajectory of the track post as it slides from the second temporary position to the first fixed position includes a trajectory along the second direction and a trajectory along the width of the watchband. Alternatively, the trajectory of the track post as it slides from the first fixed position to the first temporary position can be decomposed into a trajectory component along the second direction and a trajectory component along the width of the watchband.

[0122] As shown in Figures 4 (a) to (c), the trajectory of the track post 6 as it slides from the first fixed position to the first temporary position includes a first trajectory segment along the width of the watchband. As shown in Figures 4 (g) to (i), the trajectory of the track post as it slides from the second temporary position to the first fixed position includes a second trajectory segment along the width of the watchband, and the first and second trajectory segments point in opposite directions. For example, in Figures 4 (a) to (c), the track post 6 slides upward along the width of the watchband, while in Figures 4 (g) to (i), the track post 6 slides downward along the width of the watchband. In this way, the track post can slide back and forth between the extended position and the retracted position along the track groove.

[0123] In the examples shown in Figures 3 to 5B, there are an extended position and a retracted position, i.e., two gears, one extended and one retracted. For example, as shown in Figure 6, along the annular track of the track groove 5, the track groove 5 includes a first track groove 51 and a second track groove 52 connected to each other; when the track post 6 slides along the first track groove, it can slide from the first fixed position (extended position) to the second fixed position (retracted position), thereby tightening the watch strap; when the track post 6 slides along the second track groove, it can slide from the second fixed position (retracted position) to the first fixed position (extended position), thereby loosening the watch strap. In this example, the first track groove 51 follows a track path from the first fixed position, position A, the first temporary position, position B to the second fixed position, and the second track groove 52 follows a track path from the second fixed position, position C, position D to the first fixed position.

[0124] In other examples, multiple telescopic gears can be included to increase the fine-tuning range.

[0125] For example, as shown in FIG7 , a three-position watchband length fine-tuning structure is shown, namely, a first fixed position, a second fixed position, and a third fixed position. The track column 6 can also slide in a single direction within the track groove 5 along the dotted line with an arrow in FIG7 to achieve switching of multiple gears.

[0126] See Figure 7. Along the length direction of the strap (direction P as shown in Figure 7), the third fixed position is between the first fixed position and the second fixed position. The first fixed position can be understood as an extended position, and the second fixed position and the third fixed position are in a contracted position compared to the first fixed position.

[0127] In some other examples, along the length of the strap, the second fixed position is closer to the first fixed position than the third fixed position.

[0128] In the example of the present application, the second fixed position and the third fixed position in the retracted position are on the same side of the first fixed position and are closer to the strap than the first fixed position.

[0129] As shown in FIG7 , along the width direction of the watchband (the S direction as shown in FIG7 ), the first fixing position, the second fixing position and the third fixing position are arranged at intervals.

[0130] In other examples, more gears can be set according to the adjustment principles of Figures 4 and 6 to further increase the fine-tuning range.

[0131] In some implementation structures, as shown in Figure 8, the wall surface of the slider 4 used to form the track groove 5 includes: a first abutment surface 81 and a second abutment surface 82, both of which are facing the direction of the strap 10, and the second abutment surface 82 is closer to the strap 10 than the first abutment surface 81.

[0132] In the first fixed position (extended position), the track post 6 abuts against the first abutment surface 81 ; in the second fixed position (retracted position), the track post 6 abuts against the second abutment surface 82 .

[0133] In the example of the present application, as shown in FIG8 , since the elastic member 3 is used to apply an elastic force F to the movable plate 2 in the direction of the watch strap 10 , no matter whether the track column 6 abuts against the first abutting surface 81 or the second abutting surface 82 , it can be subjected to the squeezing force of the slider 4 on the track column 6 in the direction of the watch strap, thereby making the watch strap stably in an extended state or a contracted state, thereby improving the stability and reliability of the device.

[0134] The first abutting surface 81 or the second abutting surface 82 can have various shapes. For example, as shown in FIG8 , the first abutting surface 81 and the second abutting surface 82 are both arcuate surfaces. To ensure a tight fit between the track post 6 and the corresponding abutting surfaces, the surface of the track post 6 that abuts the first abutting surface 81 and the surface of the track post 6 that abuts the second abutting surface 82 include an arcuate surface. For another example, the first abutting surface 81 and the second abutting surface 82 can both be flat surfaces, and the surface of the track post 6 that abuts the first abutting surface 81 and the surface of the track post 6 that abuts the second abutting surface 82 include a flat surface.

[0135] In the example of this application, there are various structures for forming the track groove. For example, in Figure 9, the slider 4 includes a first protrusion 41 and a second protrusion 42, and the second protrusion 42 surrounds the outer periphery of the first protrusion 41 to form an annular track groove 5 between the first protrusion 41 and the second protrusion 42.

[0136] In this example, the first abutting surface 81 is located on the wall surface of the second protrusion 42 that forms the track groove 5 ; the second abutting surface 82 is located on the wall surface of the first protrusion 41 that forms the track groove 5 .

[0137] As shown in Figure 10, a partial exploded view of the housing 1 and the movable plate 2 is shown. In the example of Figure 10, the slider 4 is slidably disposed on the movable plate 2, and a slide groove 7 can be provided on the movable plate 2, with the extension direction of the slide groove being parallel to the width direction of the watchband (direction S in Figure 10).

[0138] Slider 4 is slidably disposed within slot 7 and can slide along the slot's extension direction. For example, slider 4 includes a first side surface and a second side surface facing each other, the first and second side surfaces being arranged parallel to the strap's extension direction (e.g., direction P in FIG10 ); both the first and second side surfaces are slidably connected to movable plate 2. For example, the first and second side surfaces of slider 4 can each be loosely coupled to the movable plate, allowing the slider to slide along the slot.

[0139] In some other examples, a track may be provided on the slider 4, and a track groove may be provided on the movable plate, so that the track of the slider can slide along the track groove on the movable plate, thereby enabling the slider to slide on the movable plate.

[0140] In the example of the present application, as shown in FIG10 , the elastic member 3 can be a spring, one end of which is connected to the housing 1 and the other end is connected to the movable plate 2. In addition, in the first fixed position (e.g., the extended position) and the second fixed position (e.g., the retracted position), the spring is in a stretched state, so that the watchband is maintained in the extended state or the retracted state.

[0141] In some examples, a first mounting post may be provided on the housing 1 , a second mounting post may be provided on the movable plate 2 , and one end of the spring may be fixed to the first mounting post, and the other end may be fixed to the second mounting post.

[0142] In order to improve the stability of the movement of the movable plate 2 and make the strap stably in the extended state and the contracted state, as shown in Figure 10, two springs can be provided, and the two springs are symmetrically arranged so that the pulling force of the spring on the movable plate is relatively symmetrical.

[0143] In some structures, as shown in FIG10 , a mounting groove 9 can be provided on the movable plate 2, and the spring is provided in the mounting groove 9. In this way, not only the thickness of the clasp can be compressed, but also a guiding and limiting function is provided, so that the spring is compressed and extended along its length direction.

[0144] For ease of assembly and disassembly, in some possible structures, as shown in Figure 11, which exemplarily illustrates an exploded view of the clasp, the housing 1 may include a base plate 11 and a cover 12, which are engaged with the base plate 11 and the cover 12 to form a chamber, in which the movable plate 2 is slidably disposed.

[0145] The base plate 11 and the cover 12 are detachably connected. For example, a threaded connector can be used to connect the base plate 11 and the cover 12. To simplify the structure, as shown in Figure 11, the second mounting post 22 can be disposed on the movable plate 2, and the first mounting post 21 can be disposed on the cover 12. A hole can be provided in the first mounting post 21, and the threaded connector 31 can extend through the base plate 11 and into the hole in the first mounting post 21 to securely connect the base plate 11 and the cover 12.

[0146] When the clasp of the example of this application is put on the watch strap, as shown in Figure 11, the clasp is rotatably connected to the watch strap. In addition, it can also include a first plate 51 and a second plate 52. One end of the first plate 51 is fixedly connected to the shell 1, and the other end is rotatably connected to the second plate 52. The second plate 52 is snap-fitted to the shell 1, and the second plate 52 can be connected to another watch strap.

[0147] The clasp capable of fine-tuning the length of the watch strap involved in the present application can be used not only in a watch strap with holes as shown in FIG1 , but can also be used in a watch strap with multiple links, and can also be used in watch straps with other structures.

[0148] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0149] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A watch buckle for connecting a watchband, characterized in that, The watch buckle includes: a housing; a movable plate that can move along the extending direction of the watch band, and the movable plate is used for connecting with the watch band; a slider and a track post, the slider has an annular track groove, the track post is slidably arranged in the track groove, and one of the slider and the track post is arranged on the housing, and the other is arranged on the movable plate; an elastic member that connects the housing and the movable plate; the track post can slide between a first fixed position and a second fixed position along the annular track of the track groove, and the slider moves along a direction intersecting with the extending direction of the watch band to adjust the tightness of the watch band; the elastic member is used for applying elastic forces in directions away from each other to the movable plate and the housing, so that the track post is maintained at the first fixed position and the second fixed position.

2. The watch buckle according to claim 1, characterized in that, When the watch band is tightened, the movable plate and the housing approach each other, the track post slides along the track groove from the first fixed position to a first temporary position, and under the elastic force of the elastic member, the track post slides along the track groove from the first temporary position to the second fixed position; In the extending direction of the watch band, the second fixed position is located between the first fixed position and the first temporary position; In the width direction of the watch band, the first temporary position is located between the first fixed position and the second fixed position.

3. The buckle according to claim 2, characterized in that, The track of the track post sliding from the first fixed position to the first temporary position includes: a track along a first direction and a track along the width direction of the watch band, and the first direction is the direction in which the movable plate and the housing approach each other.

4. The buckle according to claim 2 or 3, characterized in that, The track of the track post sliding from the first temporary position to the second fixed position includes: a track along a second direction and a track along the width direction of the watch band, and the second direction is the direction in which the movable plate and the housing move away from each other.

5. The watch buckle according to any one of claims 2-4, characterized in that, When the watch band is loosened, the movable plate and the housing approach each other, the track post slides along the track groove from the second fixed position to a second temporary position, and under the elastic force of the elastic member, the movable plate and the housing move away from each other, and the track post slides along the track groove from the second temporary position to the first fixed position; In the extending direction of the watch band, the second fixed position is located between the first fixed position and the second temporary position; In the width direction of the watch band, the second fixed position is located between the first fixed position and the second temporary position.

6. The buckle according to claim 5, characterized in that, The track of the track post sliding from the second fixed position to the second temporary position includes: a track along a first direction and a track along the width direction of the watch band, and the first direction is the direction in which the movable plate and the housing approach each other.

7. The buckle according to claim 5 or 6, characterized in that, The track of the track post sliding from the second temporary position to the first fixed position includes: a track along a second direction and a track along the width direction of the watch band, and the second direction is the direction in which the movable plate and the housing move away from each other.

8. The buckle according to any one of claims 5-7, characterized in that, In the width direction of the watch band, the second fixed position is located between the first temporary position and the second temporary position.

9. The buckle according to any one of claims 5-8, characterized in that, The trajectory of the track post sliding from the first fixed position to the first temporary position includes a first track segment along the width direction of the watch band. The trajectory of the track post sliding from the second temporary position to the first fixed position includes a second track segment along the width direction of the watch band. The first track segment and the second track segment point in opposite directions.

10. The watch buckle according to any one of claims 1-9, characterized in that When the watch band is tightened and the track post slides along the track groove from the first fixed position towards the second fixed position, the slider slides along a third direction parallel to the width direction of the watch band; When the watch band is loosened and the track post slides along the track groove from the second fixed position towards the first fixed position, the slider slides along a fourth direction opposite to the third direction.

11. The buckle according to any one of claims 1-10, characterized in that, When the movable plate moves along the extension direction of the watch band, the track post can slide unidirectionally along the annular track groove, so that the track post slides between the first fixed position and the second fixed position.

12. The buckle according to any one of claims 1-11, characterized in that, Along the annular track of the track groove, the track groove includes a connected first track groove and a second track groove; When the track post slides along the first track groove, it can slide from the first fixed position to the second fixed position; When the track post slides along the second track groove, it can slide from the second fixed position to the first fixed position.

13. The buckle according to any one of claims 1-12, characterized in that, The wall surface of the slider for enclosing the track groove includes: a first abutting surface and a second abutting surface. Both the first abutting surface and the second abutting surface face the direction of the watch band, and the second abutting surface is closer to the watch band than the first abutting surface; In the first fixed position, the track post abuts against the first abutting surface; In the second fixed position, the track post abuts against the second abutting surface.

14. The buckle according to claim 13, characterized in that, The track post includes a first arc surface, and any one of the first abutting surface and the second abutting surface includes a second arc surface; When the track post is held at the first fixed position or the second fixed position, under the elastic force of the elastic member, the first arc surface fits with the second arc surface.

15. The buckle according to claim 13 or 14, characterized in that, The slider includes a first convex block and a second convex block. The second convex block surrounds the first convex block, and an annular track groove is formed between the first convex block and the second convex block; The first abutting surface is located on the wall surface of the second convex block enclosing the track groove; The second abutting surface is located on the wall surface of the first convex block enclosing the track groove.

16. The buckle according to any one of claims 1-15, characterized in that, The slider is slidably arranged on the movable plate, and the track post is arranged on the housing; A chute for the slider to slide is formed on the movable plate, and the extending direction of the chute is parallel to the width direction of the watch band.

17. The buckle according to claim 16, characterized in that, The slider includes a first side surface and a second side surface facing each other, and the arrangement directions of the first side surface and the second side surface are parallel to the extension direction of the watch band; Both the first side surface and the second side surface are slidably connected to the movable plate.

18. The buckle according to any one of claims 1-17, characterized in that, The elastic member includes a spring, one end of the spring is connected to the housing, and the other end is connected to the movable plate; In the first fixed position and the second fixed position, the spring is in a stretched state.

19. The buckle according to claim 18, characterized in that, An accommodation groove is formed in the movable plate, and the spring is disposed in the accommodation groove.

20. A watchband assembly, characterized in that, Comprising: A first watch band; The buckle according to any one of claims 1-19; Wherein, the movable plate of the buckle is connected to the first watch band.

21. The strap assembly according to claim 20, wherein The movable plate is rotatably connected to the first watch band; The watch band assembly further includes a second watch band, a first plate and a second plate; One end of the first plate is fixedly connected to the housing, the other end is rotatably connected to the second plate, the second plate is snap-connected to the housing, and the second plate is connected to the second watch band.

22. A wearable device, characterized in that, Comprising: A watch face; The watch band assembly according to claim 20 or 21; Wherein, the first watch band of the watch band assembly is connected to the watch face.

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