WATCH CLASP, WATCH STRAP AND WEARABLE DEVICE

Abstract

A clasp (100), a watchband (400), and a wearable device (1000). The clasp (100) comprises a first folding member (110), a second folding member (120), a mounting base (130), and a spring latch assembly (140). One end of the first folding member (110) is fixed on the mounting base (130), the other end of the first folding member (110) is rotatably connected to one end of the second folding member (120), and the other end of the second folding member (120) is connected to the mounting base (130) by means of the spring latch assembly (140). A first portion (140a) and a second portion (140b) of the spring latch assembly (140) can be engaged or disengaged, so that the first folding member (110) and the second folding member (120) remain closed or open. During production and use, one of the first portion (140a) and the second portion (140b) has a large elastic travel or elastic deformation, so that the first portion (140a) and the second portion (140b) are less prone to a deformation failure, thereby improving the reliability and stability of the clasp (100). The watchband (400) comprises a first fixed band (200), a second fixed band (300), and the clasp (100), and the clasp (100) can achieve a detachable connection between the first fixed band (200) and the second fixed band (300). The wearable device (1000) comprises a device body (500) and the watchband (400), and the first fixed band (200) and the second fixed band (300) are both connected to the device body (500).

Description

A watch buckle, watch strap and wearable device

[0001] This application claims priority to Chinese Patent Application No. 202410672447.7, filed on May 27, 2024, entitled “A Watch Buckle, Watch Strap and Wearable Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of wearable device technology, and more particularly to a watch buckle, watch strap, and wearable device. Background Technology

[0003] In wearable devices (such as watches), each end of the main body is connected to a strap. A clasp allows for a detachable connection between the two straps and adjustment of their length. Ensuring a stable and reliable clasp to improve the user experience is a challenge the industry needs to address. Summary of the Invention

[0004] This application provides a watch buckle, watch strap, and wearable device. The watch buckle is stable and reliable during use.

[0005] The embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a watch buckle, comprising: a first folding member, a second folding member, a mounting base, and a snap-on assembly. The first folding member has a first end and a second end opposite to each other, the first end being fixed to the mounting base. The second folding member has a third end and a fourth end opposite to each other, the second end and the third end being rotatably connected to allow the first folding member and the second folding member to close or open. The snap-on assembly includes a first portion disposed on the mounting base and a second portion disposed at the fourth end. When the first folding member and the second folding member are closed, the first portion and the second portion of the snap-on assembly are locked together. When the first folding member and the second folding member are opened, the first portion and the second portion of the snap-on assembly are separated.

[0007] The watch buckle provided in this embodiment has one end of a first folding member fixed to a mounting base, and the other end of the first folding member and one end of a second folding member rotatably connected. The other end of the second folding member and the mounting base are connected via a spring-loaded buckle assembly. The first and second parts of the spring-loaded buckle assembly can lock or disengage, thereby allowing the first and second folding members to remain closed or open. Compared to related technologies that employ a rigid interference structure with a first and second fastener, the spring-loaded buckle assembly in this embodiment has a certain degree of elasticity. During production and use, one of the first and second parts has a larger elastic stroke or elastic deformation, making it less prone to deformation and failure, thus improving the reliability and stability of the watch buckle.

[0008] In one optional implementation, the first folding member includes a first arc-shaped plate, and the second folding member includes a second arc-shaped plate; the two opposite ends of the first arc-shaped plate are respectively a first end and a second end, and the two opposite ends of the second arc-shaped plate are respectively a third end and a fourth end. The second end and the third end are rotatably connected by a pin. When the first folding member and the second folding member are closed, the first arc-shaped plate and the second arc-shaped plate are arranged along the direction of the pin, and the extension directions of the first arc-shaped plate and the second arc-shaped plate are the same.

[0009] The closed first and second folding members form an arc-shaped structure and are held between the first and second fixing bands, having minimal impact on the bending shape of the first and second fixing bands. With the same total thickness, the thickness of the first and second arc-shaped plates can be increased, enhancing their rigidity and making them less prone to deformation under stress.

[0010] In one alternative implementation, the first arc-shaped plate and the second arc-shaped plate are rotatably connected by a pin. The ends of the first arc-shaped plate and the ends of the second arc-shaped plate are respectively provided with connecting holes, and the pin is connected to the connecting holes of both, so that both the first arc-shaped plate and the second arc-shaped plate can rotate around the pin.

[0011] In one alternative implementation, there are multiple first arc-shaped plates, which are spaced apart along the direction of the pin shaft (i.e., the axial direction of the pin shaft). When the first folding member and the second folding member are closed, at least one second arc-shaped plate is located between the multiple first arc-shaped plates. The rotational connection between the first arc-shaped plates and the second arc-shaped plates is stable and reliable.

[0012] In one alternative implementation, two first arc-shaped plates are spaced apart along the direction of the pin shaft, and a second arc-shaped plate is positioned between the two first arc-shaped plates. The rotational connection between the first and second arc-shaped plates is stable and reliable. The position of the spring-loaded assembly can correspond to the fourth end of the second arc-shaped plate or to the first end of the first arc-shaped plate.

[0013] In one optional implementation, two first arc-shaped plates and two second arc-shaped plates are configured, with the first and second arc-shaped plates arranged alternately along the direction of the pin shaft. The rotational connection between the first and second arc-shaped plates is stable and reliable. The position of the spring-loaded assembly can correspond to the fourth end of one of the second arc-shaped plates, or it can correspond to the first end of the first arc-shaped plate.

[0014] In one alternative implementation, when multiple spring-loaded fastener components are provided, one spring-loaded fastener component can be set at the fourth end of the second arc-shaped plate near the middle position, and another spring-loaded fastener component can be set at the first end of the first arc-shaped plate near the middle position. Multiple spring-loaded fastener components can make the connection between the second folding member and the mounting base stable and reliable.

[0015] In one alternative implementation, a first arc-shaped plate and a second arc-shaped plate are arranged along the direction of the pin (i.e., the axial direction of the pin). The rotational connection between the first arc-shaped plate and the second arc-shaped plate is stable and reliable. The position of the spring-loaded assembly can correspond to the fourth end of the second arc-shaped plate or the first end of the first arc-shaped plate.

[0016] In one alternative implementation, the first part is a bayonet structure, and the second part is a snap fastener, which can be engaged and mated.

[0017] In one alternative implementation, the first part is a snap-fit, and the second part is a bayonet structure, which can engage with the snap-fit.

[0018] In one alternative implementation, the first end of the first folding member has a cover portion, which is fixed to a mounting base. The cover portion and the mounting base form a mounting groove, and a bayonet structure is disposed at the mounting groove. The cover portion has a clearance area for exposing part of the bayonet structure. This facilitates the bayonet structure being disposed on the mounting base, and the mounting base and cover portion provide protection for the bayonet structure. The cover portion is fixed to the mounting base, thus fixing the first end of the first folding member to the mounting base.

[0019] In one alternative implementation, the mounting groove may be formed on the mounting base, and the cover may cover the opening of the mounting groove. Alternatively, the mounting groove may be formed on the cover, and the mounting base may cover the opening of the mounting groove.

[0020] In one alternative implementation, the mounting base is a rectangular parallelepiped, and the length direction of the mounting base and the width direction of the fixing strap can be parallel. The cover can be a rectangular plate.

[0021] In one alternative implementation, the cover and the mounting base can be assembled using fasteners (such as screws), snaps, adhesives, or other methods.

[0022] In one alternative implementation, the cover and the mounting base are connected by fasteners arranged along the stacking direction of the cover and the mounting base.

[0023] In one alternative implementation, the cover and the mounting base are connected by fasteners. The side of the cover facing the mounting base may have a protruding structure, while the side of the mounting base facing the cover may have a recessed structure. The recessed and protruding structures are adapted to each other. Aligning the protruding structure with the recessed structure increases the effective length of the fasteners, ensuring a reliable connection between the cover and the mounting base, and allowing for a smaller total thickness of the cover and mounting base.

[0024] In one alternative implementation, when the convex structure is in the shape of a convex frame, the concave structure is a frame-shaped groove; or, when the convex structure is in the shape of a convex rectangle, the concave structure is a rectangular groove.

[0025] In one optional implementation, the latch structure may include a sliding fastener and an elastic element. The sliding fastener is movably mounted on the mounting base. One end of the elastic element is positioned opposite the sliding fastener, and the other end is positioned opposite the wall of the mounting base. The elastic element is used to elastically extend and retract the sliding fastener. When the elastic element is in the extended state, the sliding fastener is in the extended position, and the snap-lock assembly is in the locked or disengaged state. When the elastic element is in the compressed state, the sliding fastener is in the retracted position, and the snap-lock assembly is in the critical state. During the contact and engagement process between the sliding fastener and the snap-lock, the elastic element can extend and deform. Under the action of the elastic element, the sliding fastener can have a large sliding stroke. Neither the sliding fastener nor the snap-lock is prone to deformation and failure under stress, resulting in high reliability and stability of the clasp.

[0026] When the spring-loaded assembly is in the locked state, the elastic element on the mounting base extends to its maximum length. This extension causes the sliding element to extend, engaging with the latch. The first and second folding parts remain closed. When the spring-loaded assembly is in the disengaged state (i.e., the first and second parts are separated), the elastic element on the mounting base extends to its maximum length, causing the sliding element to extend and completely separating from the latch. The first and second folding parts remain open. When the spring-loaded assembly is in the critical state, the sliding element and the latch contact. The sliding element compresses and stores energy in the elastic element on the mounting base, reducing its length. By moving the latch relative to the mounting base, the latch and sliding element can engage or disengage. The elastic element on the mounting base can then return to its maximum length.

[0027] In one alternative implementation, the elastic element is an elastic structure such as a spring or a sheet.

[0028] In one alternative implementation, the sliding fastener includes a sliding portion and a first fastening portion. The sliding portion is slidably mounted on the mounting base and has two opposite ends along its sliding direction (i.e., the moving direction of the sliding fastener). The first fastening portion is connected to one end of the sliding portion, and an elastic element is provided at the other end of the sliding portion. The fastener can engage with the first fastening portion.

[0029] The snap-lock assembly is in the disengaged state. Under the action of the elastic element, the first snap part extends out of the cover, and the snap and the extended first snap part are completely separated. When it is necessary for the snap and the first snap part to engage, the snap is pushed into the first snap part. The snap acts on the first snap part, causing it to retract inward. The elastic element compresses and stores energy, and the snap-lock assembly is in a critical state. Continuing to push the snap into the first snap part allows them to engage. The elastic element extends and releases energy, causing the first snap part to extend, and the snap-lock assembly is in the locked state. During the contact and engagement process between the snap and the sliding buckle, the elastic element allows the sliding buckle to elastically expand and contract. The latch structure has a large elastic stroke, making the snap and sliding buckle less prone to deformation and failure under stress, resulting in high reliability of the watch clasp.

[0030] In one alternative implementation, the cross-sectional shape of the sliding part is adapted to the cross-sectional shape of the mounting groove of the mounting base in the sliding direction (i.e., the moving direction of the sliding fastener), so that the sliding part can be slidably mounted on the mounting base in a predetermined direction.

[0031] In one alternative implementation, both the cross-section of the sliding part and the cross-section of the mounting groove are rectangular in the sliding direction of the sliding part. The sliding part can be cuboid or other shapes. The first fastener can be sheet-like, L-shaped, or other shapes.

[0032] In one alternative implementation, the mounting base has a first stop wall for abutting against and engaging with the sliding part to limit the sliding part; the first stop wall has an opening for the first buckle to extend out.

[0033] In one alternative implementation, the first fastener includes a first segment and a second segment, which are L-shaped and connected to each other. The first segment is connected to the sliding part, and the second segment is used for engaging with the snap fastener. The L-shaped first fastener has good structural strength, improving its reliability. Under the action of the elastic element, the sliding part abuts against the first stop wall, the first segment is located at the opening, and the second segment extends out of the opening.

[0034] In one alternative implementation, the sliding fastener further includes a first limiting part connected to one end of the sliding part opposite to the first fastening part, and one end of the elastic element is mounted on the first limiting part. This improves the reliability of the engagement between the sliding fastener and the elastic element.

[0035] In one alternative implementation, the elastic element is a compression spring. The first limiting part can be a columnar structure provided on the sliding part, and the compression spring is sleeved on the columnar structure.

[0036] In one alternative implementation, the elastic element is a compression spring. The first limiting part can also be a positioning hole provided on the sliding part, with one end of the compression spring extending into the positioning hole.

[0037] In one alternative implementation, the sliding part is provided with multiple elastic elements, and the mounting base has partitions, with adjacent elastic elements separated by the partitions. Arranging multiple short elastic elements side-by-side on a small mounting base increases the elastic force on the sliding part and avoids interference between two elastic elements during use.

[0038] In one alternative implementation, the head of the snap fastener has a first guide surface, which is used to slide into contact with the first buckle during the process of switching the first folding member and the second folding member from open to closed, so as to switch the snap fastener assembly from a separated state to a critical state.

[0039] During the process of pressing the snap-on assembly to push the buckle into the bayonet structure, the first guide surface of the buckle head and the first buckle part slide into contact, allowing the first buckle part to switch from the extended position to the retracted position, while the elastic element switches from extension to compression. That is, the snap-on assembly switches from the separated state to the critical state, making it convenient for the user to push the buckle into the bayonet structure. The first guide surface can be an arc-shaped surface.

[0040] In one alternative implementation, the buckle has a second guide surface in the middle, which is used to slide into contact with the first buckle during the process of switching the first folding member and the second folding member from closed to open, so that the snap fastener assembly switches from the locked state to the critical state.

[0041] During the process of pulling open the buckle to disengage it from the latch structure, the second guide surface in the middle of the buckle slides into contact with the first buckle part, allowing the first buckle part to switch from the extended position to the retracted position, while the elastic element switches from extension to compression. That is, the snap-on assembly switches from the locked state to the critical state, making it convenient for the user to disengage the buckle from the latch structure. The second guide surface can be an arc-shaped surface.

[0042] In one alternative implementation, the snap fastener includes a columnar portion and a head, the head being connected to one end of the columnar portion, and the other end of the columnar portion being connected to a fourth end of the second folding member. The end of the head away from the columnar portion has a first guide surface. The side of the head facing the columnar portion has a second guide surface.

[0043] In one alternative implementation, the latch structures are arranged in pairs, with the first snap-fit ​​portions of the paired latch structures facing each other at intervals, and the elastic extension and retraction directions of the paired latch structures are opposite. The snap-fit ​​includes a columnar portion and a head, with the head connected to one end of the columnar portion and the other end connected to the fourth end of the second folding member. When the first and second folding members are closed, the columnar portion is located between the paired first snap-fit ​​portions, and the head abuts against the paired first snap-fit ​​portions. The engagement of the same snap-fit ​​with the paired latch structures improves the connection reliability of the spring-loaded assembly.

[0044] In one alternative implementation, the moving direction of the sliding fastener, the extending direction of the elastic element, and the length direction of the mounting base are parallel. The length direction of the mounting base can be the width direction of the fixing strap of the wearable device. By making full use of the space in the length direction of the mounting base, the width dimension of the mounting base can be made smaller.

[0045] In one alternative implementation, the mounting base is cuboid, with its length direction being the width direction of the fixing strip, its width direction being the extension direction of the fixing strip, and its thickness direction being the thickness direction of the fixing strip.

[0046] In one alternative implementation, the moving direction of the sliding fastener is parallel to the telescopic direction of the elastic element, and the moving direction of the sliding fastener is perpendicular to the length direction of the mounting base.

[0047] In one alternative implementation, the mounting base has a mounting hole; the sliding fastener includes a button portion and a second fastening portion. The button portion is slidably mounted on the mounting base and exposed at the mounting hole, and the second fastening portion is connected to the button portion. An elastic element is located on the side of the button portion away from the mounting hole, and the latch can engage with the second fastening portion. During the contact and engagement process between the latch and the sliding fastener, the elastic element allows the sliding fastener to elastically expand and contract. The latch structure has a large elastic stroke, making the latch and sliding fastener less prone to deformation and failure under stress, resulting in high reliability of the watch clasp.

[0048] In one alternative implementation, the cross-sectional shape of the button part is adapted to the cross-sectional shape of a portion of the mounting groove of the mounting base in the sliding direction of the button part (i.e., the moving direction of the sliding fastener), so that the button part can be linearly slidably mounted on the mounting base in a predetermined direction.

[0049] In one alternative implementation, both the cross-section of the button and the partial cross-section of the mounting groove are rectangular in the sliding direction of the button. The button can be cuboid. The second latch can be strip-shaped.

[0050] In one alternative implementation, the sliding fastener further includes a second limiting part connected to the button part. The mounting base has a second stop wall, which engages with the second limiting part to limit the position of the button part, preventing it from detaching from the mounting base.

[0051] In one alternative implementation, the second limiting part can be a protruding structure provided on the button part, and the protruding structure and the second stop wall abut against each other.

[0052] In one alternative implementation, the side of the button portion away from the mounting hole has a receiving groove, and the elastic element is at least partially disposed within the receiving groove. This reduces the space occupied by the elastic element on the mounting base and facilitates the positioning and installation of one end of the elastic element on the button portion.

[0053] In one alternative implementation, the head of the snap fastener has a third guide surface, which is used to slide into contact with the second snap fastener during the process of switching the first and second folding parts from open to closed, so that the snap fastener assembly switches from a separated state to a critical state.

[0054] During the process of pressing the snap-on assembly to push the buckle into the bayonet structure, the third guide surface of the buckle head and the second buckle part slide into contact, allowing the second buckle part to switch from the extended position to the retracted position, while the elastic element switches from extension to compression. That is, the snap-on assembly switches from the separated state to the critical state, making it convenient for the user to push the buckle into the bayonet structure. The third guide surface can be an inclined surface or a curved surface.

[0055] In one alternative implementation, the moving direction of the sliding fastener is parallel to the extending direction of the elastic element, and the moving direction of the sliding fastener is perpendicular to the length direction of the mounting base. By fully utilizing the length space of the mounting base, the button portion in the sliding fastener can be made relatively long, making it convenient for users to press the button portion.

[0056] In one alternative implementation, the mounting base is cuboid, with its length direction being the width direction of the fixing strip, its width direction being the extension direction of the fixing strip, and its thickness direction being the thickness direction of the fixing strip.

[0057] In one alternative implementation, the moving direction of the sliding fastener is parallel to the telescopic direction of the elastic element, and the moving direction of the sliding fastener is parallel to the length direction of the mounting base.

[0058] In one alternative implementation, the latch structure may include a flexible, deformable spring with a slot whose opening width is variable. When the latch assembly is in a locked or disengaged state, the opening width of the slot is a first width. When the latch assembly is in a critical state, the opening width of the slot is a second width; the first width is less than the second width.

[0059] During the contact and fastening process between the bending spring and the buckle, the bending spring can be bent and deformed, and the bending spring can have a large amount of elastic deformation. Neither the bending spring nor the buckle is easily deformed or failed under stress, which makes the watch buckle highly reliable and stable.

[0060] In one optional implementation, the bending spring includes a first lateral arm, a first inclined arm, a second inclined arm, a second lateral arm, a third inclined arm, a fourth inclined arm, and a third lateral arm connected sequentially. The first lateral arm, the second lateral arm, and the third lateral arm are flush and mounted on a mounting base. The first and second inclined arms are parallel to each other, as are the third and fourth inclined arms. The second and third inclined arms are spaced apart, forming a groove between them. When the spring clip assembly is in the locked state, and the clip is located between the second and third inclined arms, the second and third inclined arms abut against opposite sides of the clip.

[0061] In the initial state of the bent spring, the second tilting arm, the third tilting arm, and the second lateral arm are roughly arranged in a triangle. The ends of the second tilting arm and the third tilting arm, which are furthest from the second lateral arm, are positioned close together at intervals, and the opening width of the slot is relatively small. When the latch is just pushed into the slot of the bent spring, it acts on the second and third tilting arms, causing them to open to both sides. The second tilting arm follows the movement of the first tilting arm, and the fourth tilting arm follows the movement of the third tilting arm, resulting in a larger opening width of the slot. When the latch is fully pushed into the slot of the bent spring, it is limited by the second and third tilting arms, achieving locking between the latch and the bent spring.

[0062] In one alternative implementation, a cover is provided on the mounting base, and the cover has a clearance area. The slot of the bent spring is set corresponding to the clearance area of ​​the cover. The first tilting arm and the second tilting arm are located on one side of the clearance area, and the third tilting arm and the fourth tilting arm are located on the other side of the clearance area. The first lateral arm and the third lateral arm are limited by the cover.

[0063] In one alternative implementation, a rounded corner can be provided between the first and second tilting arms, and between the third and fourth tilting arms, to facilitate sliding contact between the head of the buckle and the rounded corner area, so that the head of the buckle and the slot of the bent spring can engage and cooperate.

[0064] In one optional implementation, the bending spring includes a sheet-like portion, a first cantilever, and a second cantilever. The sheet-like portion is disposed on a mounting base. One end of the first cantilever is connected to the sheet-like portion, and one end of the second cantilever is connected to the sheet-like portion. The first and second cantilever are spaced apart, forming a groove between them. When the spring-loaded assembly is in the locked state, and the latch is located between the first and second cantilever, the first and second cantilever abut against opposite sides of the latch.

[0065] In the initial state of the bent spring, a groove, wider at the bottom and narrower at the top, is formed between the first and second cantilever arms. The free ends of the first and second cantilever arms are positioned close together, and the opening width of the groove is relatively small. When the latch is just pushed into the groove of the bent spring, it acts on the first and second cantilever arms, causing them to open to the sides, widening the opening width of the groove. When the latch is fully pushed into the groove of the bent spring, it is limited by the first and second cantilever arms, achieving locking between the latch and the bent spring.

[0066] In one alternative implementation, the latch structure of the two types of bent springs described above includes a columnar portion and a head. The head is connected to one end of the columnar portion, and the other end of the columnar portion is connected to the fourth end of the second folding member. In the width direction of the slot opening, the width of the head is greater than the width of the columnar portion, and the width of the head is greater than the first width. The latch with the columnar portion and the head is easy to form, and the latch can engage with the bent spring.

[0067] In one alternative implementation, the two types of snap-fit ​​structures described above have a fourth guide surface on the side of the head away from the columnar part. During the process of switching from open to closed of the first and second folding parts, the fourth guide surface is used to slide into contact with the bent spring to switch the snap-fit ​​assembly from the separated state to the critical state.

[0068] During the pressing of the snap-fit ​​assembly to push the snap into the bending spring, the fourth guide surface of the snap-fit ​​head slides into contact with the bending spring, which increases the width of the slot in the bending spring. This means the snap-fit ​​assembly switches from a separated state to a critical state, making it easier for the user to push the snap into the bending spring. The fourth guide surface can be an arc-shaped surface.

[0069] In one alternative implementation, the two types of bayonet structures with bent springs described above have a fifth guide surface near the columnar part at the head. During the process of switching from closed to open of the first and second folding parts, the fifth guide surface is used to slide into contact with the bent spring so that the bayonet structure switches from the locked state to the critical state.

[0070] During the process of pulling open the buckle to disengage it from the bending spring, the fifth guide surface of the buckle head slides into contact with the bending spring, which increases the width of the bending spring's slot. This means the buckle assembly switches from the locked state to the critical state, making it easier for the user to disengage the buckle from the bending spring. The fifth guide surface can be an arc-shaped surface.

[0071] In one alternative implementation, the fourth end of the second folding member has a positioning ring for the fastening strap to pass through; the middle of the second folding member has a locking portion for engaging with the locking hole of the fastening strap. This limits the fastening strap to the second folding member and defines the usable length of the fastening strap.

[0072] In one alternative implementation, the first part on the mounting base is a buckle, and the second part at the fourth end of the second folding member is a bayonet structure, which can engage with the buckle. The fourth end of the second folding member serves as the carrier of the bayonet structure and can be configured with a structure adapted to the bayonet structure. For example, the fourth end of the second folding member can be provided with a mounting groove, allowing the bayonet structure to be positioned within the mounting groove.

[0073] In one optional implementation, the latch structure can employ elastic expansion and contraction to reduce the likelihood of stress-induced deformation failure of the latch and the latch structure itself. The latch structure may include a sliding fastener and an elastic element. The sliding fastener is movably mounted on the fourth end of the second folding member. One end of the elastic element is positioned opposite the sliding fastener, and the other end of the elastic element is positioned opposite the wall surface of the fourth end of the second folding member. The elastic element is used to elastically expand and contract the sliding fastener. When the elastic element is in the extended state, the sliding fastener is in the extended position, and the snap-lock assembly is in the locked or disengaged state. When the elastic element is in the compressed state, the sliding fastener is in the retracted position, and the snap-lock assembly is in a critical state.

[0074] During the contact and fastening process between the sliding fastener and the snap fastener, the sliding fastener can have a large sliding stroke under the action of the elastic element. Neither the sliding fastener nor the snap fastener is prone to deformation and failure under stress, which makes the watch buckle highly reliable and stable.

[0075] In one alternative implementation, the sliding fastener includes a sliding portion and a first fastening portion. The sliding portion is slidably mounted on the fourth end of the second folding member. The sliding portion has two opposite ends along its sliding direction. The first fastening portion is connected to one end of the sliding portion, and an elastic element is disposed at the other end of the sliding portion. The buckle can engage with the first fastening portion. With the cooperation of the sliding fastener and the elastic element, during the contact and engagement process between the buckle and the sliding fastener, the elastic element allows the sliding fastener to elastically expand and contract, making the buckle and the sliding fastener less prone to deformation and failure under stress, resulting in high reliability of the watch clasp.

[0076] Secondly, embodiments of this application provide a watch buckle, comprising: a first folding member, a second folding member, a mounting base, and a connecting assembly; the first folding member has a first end and a second end opposite to each other, the first end being fixed to the mounting base. The second folding member has a third end and a fourth end opposite to each other, the second end and the third end being rotatably connected to allow the first folding member and the second folding member to be closed or opened. The connecting assembly is used to detachably connect the mounting base and the fourth end. When the first folding member and the second folding member are closed, the mounting base and the fourth end are connected. When the first folding member and the second folding member are open, the mounting base and the fourth end are separated.

[0077] The buckle provided in this embodiment has one end of a first folding member fixed to a mounting base, and the other end of the first folding member and one end of a second folding member rotatably connected. The other end of the second folding member is connected to the mounting base via a connecting assembly. The buckle allows for adjustment of the length of the fixing strap to fit the user's wrist, and connects the first and second fixing straps to secure the wearable device to the user's wrist. When the wearable device is not in use, the buckle can be unlocked to loosen the first and second fixing straps, allowing the wearable device to be removed.

[0078] In one alternative implementation, the connecting component is a magnetic component, which includes a first magnetic element disposed on the mounting base and a second magnetic element disposed at the fourth end. The first and second magnetic elements are magnetically attracted to each other. One of the first and second magnetic elements is a magnet, and the other is a magnetic conductor. When the first and second folding parts are closed, the first and second magnetic elements are magnetically engaged. When the first and second folding parts are opened, the first and second magnetic elements separate.

[0079] Thirdly, embodiments of this application provide a watch strap, which includes a first fixing strap, a second fixing strap, and the aforementioned buckle. One end of the first fixing strap is rotatably connected to a mounting base. The second fixing strap is detachably mounted on a second folding member. When the second fixing strap is mounted on the second folding member and the first and second folding members are closed, the first and second folding members may be located inside the first fixing strap, or the first and second folding members may be located inside the second fixing strap.

[0080] The watch strap provided in this embodiment allows for a detachable connection between a first fixing strap and a second fixing strap via a buckle. The buckle's mounting base is connected to one end of the first fixing strap. The second fixing strap is mounted on a second folding member, and the first and second folding members are held closed by a spring-loaded buckle assembly. The first and second folding members are located inside either the first or second fixing strap, connecting the first and second fixing straps and defining the usable length of the fixing strap. When the second fixing strap is detached from the second folding member, the first and second fixing straps separate.

[0081] In one alternative implementation, a spring bar may be provided between one end of the first fixing strap and the mounting base, allowing the mounting base to be rotatably connected to the first fixing strap. The mounting base has a connecting ear to facilitate the spring bar passing through the first fixing strap, with the end of the spring bar connected to the connecting ear, thus enabling the mounting base to be rotatably connected to the first fixing strap.

[0082] In one alternative implementation, the fourth end of the second folding member has a positioning ring, the middle portion of the second folding member has a snap-fit ​​portion, and the second fixing strap has a plurality of snap-fit ​​holes arranged along the extension direction of the second fixing strap. The free end of the second fixing strap can pass through the positioning ring, and the snap-fit ​​portion can snap into one of the snap-fit ​​holes. This limits the middle portion of the second fixing strap to the second folding member and defines the usable length of the fixing strap.

[0083] In one alternative implementation, the first fixing strap has a plurality of snap-fit ​​holes arranged along its extension direction, and the second fixing strap has a plurality of snap-fit ​​holes arranged along its extension direction. The multiple snap-fit ​​holes enable breathability and improve the user experience of the wearable device.

[0084] In one alternative implementation, the mounting base of the watch buckle is connected to one end of the first fixing strap, and the first and second folding parts of the watch buckle are located inside the mounting base. When the first and second fixing straps are connected by the watch buckle, the first and second folding parts are closed and located inside the first fixing strap, and the free end of the second fixing strap is located inside the first fixing strap. This solution has a simple structure, eliminates the need for a limiting ring on the first watch strap, and allows the free end of the second fixing strap to pass through the limiting ring.

[0085] In one alternative implementation, the mounting base of the watch buckle is connected to one end of the first fixing strap, and the first and second folding parts of the watch buckle are located outside the mounting base. When the first and second fixing straps are connected by the watch buckle, the first and second folding parts are closed and located inside the second fixing strap, while the free end of the second fixing strap is located outside the first fixing strap. A limiting ring can be provided on the first watch strap to allow the free end of the second fixing strap to pass through the limiting ring, preventing the free end of the second fixing strap from being too long and causing a poor user experience.

[0086] Fourthly, embodiments of this application provide a wearable device, including a device body and the aforementioned strap, wherein one end of a first fixing strap away from the mounting base is connected to the device body, and one end of a second fixing strap is connected to the device body.

[0087] The wearable device provided in this application embodiment allows for adjustment of the length of the fixing strap via a buckle to fit the user's wrist during use. The first and second fixing straps are connected to secure the wearable device to the user's wrist. When not in use, the buckle can be unlocked to loosen the first and second fixing straps, allowing the wearable device to be removed.

[0088] In one alternative implementation, a detection module for detecting the user's physiological indicators is also included. This detection module can be located on the device body or the watch band. The detection module can be a blood pressure monitoring module, an optical volumetric plethysmography sensor, an electrocardiogram sensor, etc. Attached Figure Description

[0089] Figure 1 is a schematic diagram of the structure of the wearable device provided in an embodiment of this application;

[0090] Figure 2 is a schematic diagram of the wearable device in Figure 1 when the first and second straps are not connected;

[0091] Figure 3 is a schematic diagram of the wearable device in Figure 1 when the first and second watch straps are connected;

[0092] Figure 4 is a schematic diagram of the structure of a wearable device provided in another embodiment of this application when the first watch strap and the second watch strap are not connected;

[0093] Figure 5 is a schematic diagram of the wearable device in Figure 4 when the first and second watch straps are connected;

[0094] Figure 6 is an exploded view of the buckle provided in the embodiment of this application;

[0095] Figure 7 is an exploded view of the buckle in Figure 6 from another perspective;

[0096] Figure 8 is an assembly diagram of the mounting base and bayonet structure in the buckle of Figure 6;

[0097] Figure 9 is an assembly diagram of the first folding component being installed on the mounting base shown in Figure 8;

[0098] Figure 10 is an assembly diagram of the watch buckle in Figure 6 when the first and second folding parts are closed.

[0099] Figure 11 is an assembly diagram of the buckle in Figure 10 from another perspective;

[0100] Figure 12 is a schematic diagram of the structure of the watch buckle in Figure 10 when the first folding piece and the second folding piece are opened;

[0101] Figure 13 is an assembly diagram of the watch buckle provided in another embodiment of this application when the first folding member and the second folding member are closed;

[0102] Figure 14 is an assembly diagram of the watch buckle provided in another embodiment of this application when the first folding member and the second folding member are closed;

[0103] Figure 15 is a cross-sectional view of the buckle in Figure 11 along line AA. The first folding piece and the second folding piece are closed, and the snap fastener assembly is in the locked state.

[0104] Figure 16 is a cross-sectional view of the buckle in Figure 12 along line BB. The first folding piece and the second folding piece are open, and the snap fastener assembly is in the locked state.

[0105] Figure 17 is a cross-sectional view of the buckle in Figure 11 when the snap fastener assembly is in a critical state.

[0106] Figure 18 is an exploded view of a buckle provided in another embodiment of this application;

[0107] Figure 19 is an assembly diagram of the mounting base and bayonet structure in the buckle of Figure 18;

[0108] Figure 20 is an assembly diagram of the first folding component being installed on the mounting base shown in Figure 19;

[0109] Figure 21 is an assembly diagram of the watch buckle in Figure 18 when the first and second folding parts are closed.

[0110] Figure 22 is an assembly diagram of the buckle in Figure 21 from another perspective;

[0111] Figure 23 is a schematic diagram of the structure of the watch buckle in Figure 21 when the first folding piece and the second folding piece are opened;

[0112] Figure 24 is a partial cross-sectional view of the buckle in Figure 22 along the CC line. The first folding piece and the second folding piece are closed, and the snap fastener assembly is in the locked state.

[0113] Figure 25 is a partial cross-sectional view of the buckle in Figure 23 along line DD. The first folding piece and the second folding piece are open, and the snap fastener assembly is in the locked state.

[0114] Figure 26 is a partial cross-sectional view of the watch buckle in Figure 22 when the snap fastener assembly is in a critical state;

[0115] Figure 27 is an exploded view of a buckle provided in another embodiment of this application;

[0116] Figures 28(a) to (d) are schematic diagrams of the bent spring in the snap fastener assembly of the buckle in Figure 27, the snap fastener assembly in the locked state, the snap fastener assembly in the disengaged state, and the snap fastener assembly in the critical state, respectively.

[0117] Figure 29 is an assembly diagram of the mounting base and bent spring in the buckle of Figure 27;

[0118] Figure 30 is an assembly diagram of the first folding component being installed on the mounting base shown in Figure 29;

[0119] Figure 31 is an assembly diagram of the watch buckle in Figure 27 when the first and second folding parts are closed;

[0120] Figure 32 is an assembly diagram of the buckle in Figure 31 from another perspective;

[0121] Figure 33 is a schematic diagram of the structure of the watch buckle in Figure 31 when the first folding piece and the second folding piece are opened;

[0122] Figure 34 is a cross-sectional view of the buckle in Figure 32 along line EE. The first folding piece and the second folding piece are closed, and the snap fastener assembly is in the locked state.

[0123] Figure 35 is an exploded view of a buckle provided in another embodiment of this application;

[0124] Figures 36(a) to (d) are schematic diagrams of the bent spring in the snap fastener assembly of the buckle in Figure 35, the snap fastener assembly in the locked state, the snap fastener assembly in the disengaged state, and the snap fastener assembly in the critical state, respectively.

[0125] Figure 37 is an assembly diagram of the mounting base and bent spring in the buckle of Figure 35;

[0126] Figure 38 is an assembly diagram of the first folding component being installed on the mounting base shown in Figure 37;

[0127] Figure 39 is an assembly diagram of the watch buckle in Figure 35 when the first and second folding parts are closed;

[0128] Figure 40 is an assembly diagram of the buckle in Figure 39 from another perspective;

[0129] Figure 41 is a schematic diagram of the structure of the watch buckle in Figure 39 when the first folding piece and the second folding piece are opened;

[0130] Figure 42 is a cross-sectional view of the buckle in Figure 40 along line FF. The first folding piece and the second folding piece are closed, and the snap fastener assembly is in the locked state.

[0131] Explanation of reference numerals in the attached drawings: 100 - Buckle; 110 - First folding piece; 110a - First end; 110b - Second end; 111 - First arc-shaped plate; 112 - Pin; 112a - Axial direction of the pin; 113 - Cover; 1131 - Clearance area; 1132 - Outwardly protruding structure; 120 - Second folding piece; 120a - Third end; 120b - Fourth end; 121 - Snap fastener; 121a - First guide surface; 121b - Second guide surface; 121c - Third guide surface; 121d - Fourth guide surface; 121e - Fifth guide surface; 1211 - Columnar part; 1211a - Width of the columnar part; 1212 - Head; 1212a - Width of the head; 122 - Second arc-shaped plate; 123 - Positioning ring; 124 - Snap-fit ​​part; 130-Mounting base; 130a-Length direction of the mounting base; 131-Mounting groove; 132-Groove; 133-First baffle; 134-Opening; 135-Partition; 136-Mounting hole; 137-Second baffle; 138-Connecting ear; 139-Recessed structure; 140-Spring buckle assembly; 140a-First part; 140b-Second part; 140c-Bayonet structure; 141-Sliding fastener; 141a-Moving direction of the sliding fastener; 1411-Sliding part; 1412-First buckle part; 1413-First limiting part; 1414-Button part; 1415-Accommodating groove; 1416-Second buckle part; 1417-Second limiting part; 142-Elastic element; 143-Bending spring 1431-Slot; 1432-Opening; 1432a-First width; 1432b-Second width; 143a-First transverse arm; 143b-First tilting arm; 143c-Second tilting arm; 143d-Second transverse arm; 143e-Third tilting arm; 143f-Fourth tilting arm; 143g-Third transverse arm; 143h-Sheet-shaped part; 143i-First cantilever; 143j-Second cantilever; 200-First fixing strap; 200a-Limiting ring; 201-Snap-fit ​​hole; 300-Second fixing strap; 300a-Free end; 301-Snap-fit ​​hole; 400-Watch strap; 500-Equipment body; 1000-Wearable device. Detailed Implementation

[0132] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this implementation. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0133] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0134] It should be understood that, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0135] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0136] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0137] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0138] In related wearable devices, each end of the main body is connected to a fixing strap, which can be connected and detached via a buckle. The buckle may include two folding parts, which are rotatably connected to close or open. The two folding parts are engaged by a first fastener and a second fastener. One folding part has a first fastener, and the other has a second fastener. The first and second fasteners are a rigid interference structure, and their elastic deformation is relatively small when they are fastened together. Adjusting the fasteners during production is difficult and costly. During use, the first and second fasteners are prone to deformation and failure, making them difficult to repair.

[0139] Referring to Figures 1 to 5, this application embodiment provides a wearable device 1000, including a device body 500 and a watch strap 400. The watch strap 400 includes a first fixing strap 200, a second fixing strap 300, and a buckle 100. One end of the first fixing strap 200 is connected to the device body 500, and one end of the second fixing strap 300 is connected to the device body 500. The buckle 100 is disposed on the first fixing strap 200 and is used to detachably connect the first fixing strap 200 and the second fixing strap 300.

[0140] The wearable device 1000 can be a watch, bracelet, etc. When the wearable device 1000 is a watch, the main body 500 is the watch face, and the two opposite ends of the watch face are respectively connected to the first fixing strap 200 and the second fixing strap 300. The watch face may include a housing and a display screen disposed on the housing.

[0141] When using the wearable device 1000, the length of the fixing strap can be adjusted via the buckle 100 to fit the user's wrist, and the first fixing strap 200 and the second fixing strap 300 are connected to secure the wearable device 1000 to the user's wrist. When not using the wearable device 1000, the buckle 100 can be unlocked to loosen the first fixing strap 200 and the second fixing strap 300, thus allowing the wearable device 1000 to be undressed.

[0142] In some embodiments, a detection module for detecting user physiological indicators may also be included, which may be disposed on the device body 500 or the watch strap 400. The detection module may be a blood pressure detection module, an optical volumetric sensor, an electrocardiogram sensor, etc.

[0143] The blood pressure monitoring module includes an air bladder and a pressure sensor. During use, the air bladder is positioned outside the wrist and gradually inflated. When the internal pressure reaches a threshold, the air bladder blocks arterial blood flow to the wrist. The air bladder then gradually deflates, and the pressure sensor continuously monitors the internal pressure. Blood pressure can be calculated from the obtained pressure signal. The air bladder in the blood pressure monitoring module can be located on the inner side of the strap 400. When the wearable device 1000 is strapped to the user's wrist, the air bladder is located outside the wrist.

[0144] Photoplethysmography (PPG) sensors utilize photoelectric sensors to detect the intensity of reflected light after absorption by human blood and tissues, recording changes in blood vessel volume during the cardiac cycle. Heart rate and blood oxygenation can be determined from the resulting pulse waveform. The PPG sensor can be located on the back of the device body 500.

[0145] An electrocardiogram (ECG) sensor uses electrodes that contact the skin to record the timing and intensity of the electrical signals that cause the heart to beat. The ECG sensor can be located on the back of the device body 500.

[0146] Referring to Figures 6 to 10, an embodiment of this application provides a buckle 100, including: a first folding member 110, a second folding member 120, a mounting base 130, and a connecting assembly; the first folding member 110 has a first end 110a and a second end 110b, the first end 110a being fixed to the mounting base 130. The second folding member 120 has a third end 120a and a fourth end 120b, the second end 110b and the third end 120a being rotatably connected, so that the first folding member 110 and the second folding member 120 can be closed or opened. The connecting assembly is used to detachably connect the mounting base 130 and the fourth end 120b. Referring to Figure 11, when the first folding member 110 and the second folding member 120 are closed, the mounting base 130 and the fourth end 120b are connected. Referring to Figure 12, when the first folding member 110 and the second folding member 120 are open, the mounting base 130 and the fourth end 120b are separated.

[0147] When setting the connecting component, the connecting component can be a magnetic component, a spring-loaded component 140, etc. For example, the connecting component is a magnetic component, which includes a first magnetic element disposed on the mounting base 130 and a second magnetic element disposed on the fourth end 120b. The first and second magnetic elements are magnetically attracted to each other. One of the first and second magnetic elements is a magnet, and the other is a magnetically conductive element (such as stainless steel or silicon steel). When the first folding member 110 and the second folding member 120 are closed, the first and second magnetic elements are magnetically engaged. When the first folding member 110 and the second folding member 120 are opened, the first and second magnetic elements separate.

[0148] Referring to Figures 6 to 10, this application embodiment provides a watch buckle 100, including: a first folding member 110, a second folding member 120, a mounting base 130, and a snap-on assembly 140. The first folding member 110 has a first end 110a and a second end 110b, with the first end 110a fixed to the mounting base 130. The second folding member 120 has a third end 120a and a fourth end 120b, which are rotatably connected to allow the first folding member 110 and the second folding member 120 to close or open. The snap-on assembly 140 includes a first portion 140a disposed on the mounting base 130 and a second portion 140b disposed on the fourth end 120b. Referring to Figures 10 and 11, when the first folding member 110 and the second folding member 120 are closed, the first portion 140a and the second portion 140b of the snap-on assembly 140 are locked together. Referring to Figure 12, when the first folding member 110 and the second folding member 120 are opened, the first part 140a and the second part 140b of the snap fastener assembly 140 separate.

[0149] The second end 110b of the first folding member 110 and the third end 120a of the second folding member 120 are rotatably connected, forming a butterfly clasp. The first folding member 110 and the second folding member 120 can be closed or opened. When the first folding member 110 and the second folding member 120 are closed, they are close together, and the included angle between them can be 0° or close to 0°. When the first folding member 110 and the second folding member 120 are open, they are spread apart, forming a certain angle between them.

[0150] The first portion 140a and the second portion 140b of the snap-lock assembly 140 can be locked or disengaged. When the first portion 140a and the second portion 140b are locked, the first folding member 110 and the second folding member 120 remain closed and cannot rotate. When the first portion 140a and the second portion 140b are disengaged, the first folding member 110 and the second folding member 120 can rotate relative to each other to change the included angle between them.

[0151] The watch buckle 100 provided in this embodiment has one end of a first folding member 110 fixed to a mounting base 130, and the other end of the first folding member 110 rotatably connected to one end of a second folding member 120. The other end of the second folding member 120 is connected to the mounting base 130 via a spring-loaded buckle assembly 140. The first part 140a and the second part 140b of the spring-loaded buckle assembly 140 can be locked or disengaged, thereby allowing the first folding member 110 and the second folding member 120 to remain closed or open. Compared to related technologies that employ a hard interference structure with a first fastener and a second fastener, the spring-loaded buckle assembly 140 of this embodiment has a certain degree of elasticity. During production and use, one of the first part 140a and the second part 140b has a larger elastic stroke or elastic deformation, making it less prone to deformation and failure, thus improving the reliability and stability of the watch buckle 100.

[0152] Referring to Figures 1 to 5, this application embodiment provides a watch strap 400, which includes a first fixing strap 200, a second fixing strap 300, and a buckle 100. One end of the first fixing strap 200 is rotatably connected to a mounting base 130. The second fixing strap 300 is detachably mounted on a second folding member 120. When the second fixing strap 300 is mounted on the second folding member 120 and the first folding member 110 and the second folding member 120 are closed, the first folding member 110 and the second folding member 120 may be located inside the first fixing strap 200 (as shown in Figure 3), or the first folding member 110 and the second folding member 120 may be located inside the second fixing strap 300 (as shown in Figure 5).

[0153] The inner side of the first fixing strap 200 is the wrist-facing side of the first fixing strap 200 when the wearable device 1000 is worn. The inner side of the second fixing strap 300 is the wrist-facing side of the second fixing strap 300 when the wearable device 1000 is worn.

[0154] A spring bar can be provided between one end of the first fixing strap 200 and the mounting base 130, so that the mounting base 130 is rotatably connected to the first fixing strap 200. The mounting base 130 has a connecting ear 138, which facilitates the spring bar to pass through the first fixing strap 200. The end of the spring bar is connected to the connecting ear 138, so that the mounting base 130 is rotatably connected to the first fixing strap 200.

[0155] The watch strap 400 provided in this embodiment enables a detachable connection between the first fixing strap 200 and the second fixing strap 300 via a buckle 100. The mounting base 130 of the buckle 100 is connected to one end of the first fixing strap 200. The second fixing strap 300 is mounted on a second folding member 120. The first folding member 110 and the second folding member 120 are held closed by a snap fastener assembly 140. The first folding member 110 and the second folding member 120 are located inside either the first fixing strap 200 or the second fixing strap 300, connecting the first fixing strap 200 and the second fixing strap 300 and defining the usable length of the fixing strap. When the second fixing strap 300 is detached from the second folding member 120, the first fixing strap 200 and the second fixing strap 300 are separated.

[0156] When the aforementioned watch strap 400 is applied to the wearable device 1000, the end of the first fixing strap 200 furthest from the mounting base 130 is connected to the device body 500, and the end of the second fixing strap 300 is connected to the device body 500. The first fixing strap 200 and the second fixing strap 300 are connected by a buckle 100, so that the first fixing strap 200 and the second fixing strap 300 are secured to the user's wrist, enabling the wearable device 1000 to be worn.

[0157] In order to limit the middle portion of the second fixing strap 300 on the second folding member 120 and limit the length of the fixing strap, in some embodiments, referring to Figures 1, 6, 7 and 10, the fourth end 120b of the second folding member 120 has a positioning ring 123 for the fixing strap to pass through; the middle portion of the second folding member 120 has a snap-fit ​​portion 124 for engaging with the snap-fit ​​hole 301 of the fixing strap.

[0158] The second fixing band 300 has a plurality of snap-fit ​​holes 301 arranged along the extension direction of the second fixing band 300. The free end 300a of the second fixing band 300 can be inserted into the positioning ring 123, and the snap-fit ​​part 124 can be snapped into one of the snap-fit ​​holes 301.

[0159] When using the wearable device 1000, the first folding member 110 and the second folding member 120 are opened. First, the free end 300a of the second fixing strap 300 is passed through the positioning ring 123 of the second folding member 120, so that the middle part of the second fixing strap 300 is limited to the second folding member 120 along its thickness direction. The second fixing strap 300 can move back and forth relative to the positioning ring 123. Then, the snap-fit ​​part 124 and one of the snap-fit ​​holes 301 of the second fixing strap 300 are snapped together, limiting the length of the fixing strap to match the user's wrist size. Finally, the snap fastener assembly 140 is locked, keeping the first folding member 110 and the second folding member 120 closed, thus connecting the first fixing strap 200 and the second fixing strap 300. The wearable device 1000 is then secured to the user's wrist via the first fixing strap 200 and the second fixing strap 300.

[0160] To remove the wearable device 1000 from the user's hand, first disassemble the snap fastener assembly 140, causing the first folding member 110 and the second folding member 120 to switch from closed to open, thus detaching the wearable device 1000 from the user's hand. To separate the first fixing strap 200 and the second fixing strap 300, separate the locking part 124 from the locking hole 301 of the second fixing strap 300, and then disengage the second fixing strap 300 from the positioning ring 123, thereby separating the first fixing strap 200 and the second fixing strap 300.

[0161] To improve the breathability of the fastening straps and achieve a consistent appearance for both straps, in some embodiments, referring to Figure 1, the first fastening strap 200 has a plurality of snap-fit ​​holes 201 arranged along its extension direction, and the second fastening strap 300 has a plurality of snap-fit ​​holes 301 arranged along its extension direction. The multiple snap-fit ​​holes enhance breathability and improve the user experience of the wearable device 1000. The similar snap-fit ​​holes on both straps give them a similar appearance.

[0162] There are several possible implementation methods when setting the first fixing strap 200, the second fixing strap 300, and the buckle 100. Two implementation methods are given as examples below.

[0163] The first implementation of the first fixing strap 200, the second fixing strap 300, and the buckle 100 is as follows: Referring to Figures 1 and 2, the mounting base 130 of the buckle 100 is connected to one end of the first fixing strap 200. The first folding member 110 and the second folding member 120 of the buckle 100 are located inside the mounting base 130. The inside of the mounting base 130 is the wrist-facing side of the mounting base 130 when the wearable device 1000 is worn. Referring to Figure 3, when the first fixing strap 200 and the second fixing strap 300 are connected by the buckle 100, the first folding member 110 and the second folding member 120 are closed and located inside the first fixing strap 200, and the free end 300a of the second fixing strap 300 is located inside the first fixing strap 200. This solution has a simple structure, eliminates the need for a limiting ring on the first strap 400, and allows the free end 300a of the second fixing strap 300 to pass through the limiting ring.

[0164] The second implementation of the first fixing strap 200, the second fixing strap 300, and the buckle 100: Referring to Figure 4, the mounting base 130 of the buckle 100 is connected to one end of the first fixing strap 200. The first folding member 110 and the second folding member 120 of the buckle 100 are located outside the mounting base 130. The outside of the mounting base 130 is the side of the mounting base 130 facing away from the wrist when the wearable device 1000 is worn. Referring to Figure 5, when the first fixing strap 200 and the second fixing strap 300 are connected by the buckle 100, the first folding member 110 and the second folding member 120 are closed and located inside the second fixing strap 300, and the free end 300a of the second fixing strap 300 is located outside the first fixing strap 200. A limiting ring 200a can be provided on the first strap 400 to allow the free end 300a of the second fixing strap 300 to pass through the limiting ring 200a, thus preventing the free end 300a of the second fixing strap 300 from being too long and causing a poor user experience.

[0165] To make the first folding member 110 and the second folding member 120 thin and resistant to deformation, in some embodiments, referring to Figures 6 and 7, the first folding member 110 includes a first arc-shaped plate 111, and the second folding member 120 includes a second arc-shaped plate 122. The opposite ends of the first arc-shaped plate 111 are a first end 110a and a second end 110b, respectively, and the opposite ends of the second arc-shaped plate 122 are a third end 120a and a fourth end 120b, respectively. Referring to Figures 10 and 11, the second end 110b and the third end 120a are rotatably connected by a pin 112. When the first folding member 110 and the second folding member 120 are closed, the first arc-shaped plate 111 and the second arc-shaped plate 122 are arranged along the direction of the pin 112, and the extension directions of the first arc-shaped plate 111 and the second arc-shaped plate 122 are the same.

[0166] The first folding member 110 and the second folding member 120 are respectively set as the first arc plate 111 and the second arc plate 122. Referring to Figure 3, the closed first folding member 110 and the second folding member 120 form an arc structure and are maintained between the first fixing band 200 and the second fixing band 300. The influence on the bending shape of the first fixing band 200 and the second fixing band 300 is small, and the appearance effect is better.

[0167] The first arc plate 111 and the second arc plate 122 are arranged along the direction of the pin 112 (i.e., the axial direction 112a of the pin 112). The first arc plate 111 and the second arc plate 122 extend in the same direction. With the same total thickness, the thickness of the first arc plate 111 and the second arc plate 122 can be increased, which increases the rigidity of the two and makes them less prone to deformation under stress, thereby improving the user's experience in opening and closing the first folding member 110 and the second folding member 120.

[0168] The first arc plate 111 and the second arc plate 122 are rotatably connected by a pin 112. The ends of the first arc plate 111 and the second arc plate 122 are respectively provided with connecting holes, and the pin 112 is connected to the connecting holes of the two, so that the first arc plate 111 and the second arc plate 122 can both rotate around the pin 112.

[0169] There are several possible implementation methods when configuring the first arc-shaped plate 111 and the second arc-shaped plate 122. Two implementation methods are given as examples below.

[0170] The first implementation method of the first arc plate 111 and the second arc plate 122: Referring to Figures 6 and 10, there are multiple first arc plates 111, which are spaced apart along the direction of the pin 112 (i.e., the axial direction 112a of the pin 112). When the first folding member 110 and the second folding member 120 are closed, at least one second arc plate 122 is located between the multiple first arc plates 111.

[0171] Multiple first arc-shaped plates 111 are arranged at intervals, and at least one second arc-shaped plate 122 is disposed between the multiple first arc-shaped plates 111, so that the rotational connection between the first arc-shaped plates 111 and the second arc-shaped plates 122 is stable and reliable. One or more second arc-shaped plates 122 may be disposed between two adjacent first arc-shaped plates 111.

[0172] For example, referring to Figures 6 and 10, two first arc-shaped plates 111 are spaced apart along the direction of the pin 112, and a second arc-shaped plate 122 is disposed between the two first arc-shaped plates 111. The rotational connection between the first arc-shaped plates 111 and the second arc-shaped plate 122 is stable and reliable. When the first arc-shaped plates 111 and the second arc-shaped plate 122 are closed, the two first arc-shaped plates 111 and the second arc-shaped plate 122 form an arc-shaped structure, which is simple in structure and has a good appearance. The position of the spring-loaded assembly 140 can correspond to the fourth end 120b of the second arc-shaped plate 122, or it can correspond to the first end 110a of the first arc-shaped plate 111.

[0173] For example, referring to Figure 13, two first arc-shaped plates 111 and two second arc-shaped plates 122 are configured, and the first arc-shaped plates 111 and the second arc-shaped plates 122 are arranged alternately along the direction of the pin shaft 112. The rotational connection between the first arc-shaped plates 111 and the second arc-shaped plates 122 is stable and reliable. When the first arc-shaped plates 111 and the second arc-shaped plates 122 are closed, the two first arc-shaped plates 111 and the two arc-shaped plates 122 form an arc-shaped structure, which is simple in structure and has a good appearance. The position of the spring-loaded fastener assembly 140 can be set to correspond to the fourth end 120b of one of the second arc-shaped plates 122, or it can be set to correspond to the first end 110a of the first arc-shaped plate 111.

[0174] When multiple snap fastener components 140 are provided, one snap fastener component 140 can be provided corresponding to the fourth end 120b of the second arc plate 122 near the middle position, and another snap fastener component 140 can be provided corresponding to the first end 110a of the first arc plate 111 near the middle position. Multiple snap fastener components 140 can make the connection between the second folding member 120 and the mounting base 130 stable and reliable.

[0175] The second implementation of the first arc-shaped plate 111 and the second arc-shaped plate 122: Referring to Figure 14, a first arc-shaped plate 111 and a second arc-shaped plate 122 are arranged along the direction of the pin 112 (i.e., the axial direction 112a of the pin 112). The rotational connection between the first arc-shaped plate 111 and the second arc-shaped plate 122 is stable and reliable. When the first arc-shaped plate 111 and the second arc-shaped plate 122 are closed, they form an arc-shaped structure, which is simple in structure and has a good appearance. The position of the spring-loaded assembly 140 can correspond to the fourth end 120b of the second arc-shaped plate 122, or it can correspond to the first end 110a of the first arc-shaped plate 111.

[0176] There are several possible implementation methods for the spring-loaded buckle assembly 140. The first implementation method is as follows (referring to Figures 6 and 7): the first part 140a is a bayonet structure 140c, and the second part 140b is a buckle 121. The bayonet structure 140c and the buckle 121 can engage. The bayonet structure 140c has a large elastic stroke or elastic deformation. The second implementation method is as follows: the first part 140a is a buckle 121, and the second part 140b is a bayonet structure 140c. The bayonet structure 140c and the buckle 121 can engage. The bayonet structure 140c also has a large elastic stroke or elastic deformation. The following explanation will primarily focus on the first implementation method of the spring-loaded buckle assembly 140.

[0177] To facilitate the fixing of the first end 110a of the first folding member 110 to the mounting base 130, in some embodiments, referring to Figures 6 to 9 and Figure 15, the first end 110a of the first folding member 110 has a cover portion 113, which is fixed to the mounting base 130. The cover portion 113 and the mounting base 130 form a mounting groove 131, and a bayonet structure 140c is provided at the mounting groove 131. The cover portion 113 has a clearance area 1131 for partially exposing the bayonet structure 140c.

[0178] The first end 110a of the first folding member 110 has a cover 113, which houses the bayonet structure 140c within the mounting groove 131 formed by the mounting base 130 and the cover 113. This facilitates the placement of the bayonet structure 140c on the mounting base 130, and the mounting base 130 and the cover 113 provide protection for the bayonet structure 140c. The cover 113 is fixed to the mounting base 130, thus securing the first end 110a of the first folding member 110 to the mounting base 130. The bayonet structure 140c is partially exposed through the clearance area 1131 of the cover 113, facilitating the engagement of the buckle 121 and the bayonet structure 140c. The clearance area 1131 can be a groove or a hole.

[0179] The mounting groove 131 may be formed on the mounting base 130, and the cover 113 may cover the opening 132 of the mounting groove 131. Alternatively, the mounting groove 131 may be formed on the cover 113, and the mounting base 130 may cover the opening 132 of the mounting groove 131.

[0180] For example, the mounting base 130 may be generally a rectangular cuboid, and the length direction 130a of the mounting base 130 and the width direction of the fixing strap may be parallel. The cover portion 113 may be generally a rectangular plate. The cover portion 113 is disposed on the mounting base 130, and the stacked mounting base 130 and cover portion 113 have a small thickness dimension and a compact structure. In addition, the mounting base 130 and cover portion 113 may also be configured with other shapes.

[0181] When assembling the cover 113 and the mounting base 130, the cover 113 and the mounting base 130 can be assembled using fasteners (such as screws), snaps, adhesives, or other assembly methods.

[0182] For example, referring to Figures 6 and 7, the cover 113 and the mounting base 130 are connected by fasteners (such as screws), which are arranged along the stacking direction of the cover 113 and the mounting base 130. The fasteners may be threaded onto the mounting base 130 after passing through the cover 113, or threaded onto the cover 113 after passing through the mounting base 130.

[0183] To ensure a reliable connection between the cover 113 and the mounting base 130, and to minimize the stacking thickness of the cover 113 and the mounting base 130, in some embodiments, referring to Figures 6 and 7, the cover 113 and the mounting base 130 are connected by fasteners (such as screws). A protruding structure 1132 may be provided on the side of the cover 113 facing the mounting base 130, and a concave structure 139 may be provided on the side of the mounting base 130 facing the cover 113. The concave structure 139 and the protruding structure 1132 are adapted to each other. For example, when the protruding structure 1132 is a protruding frame, the concave structure 139 is a frame-shaped groove; or, when the protruding structure 1132 is a protruding rectangle, the concave structure 139 is a rectangular groove. Aligning and assembling the protruding structure 1132 onto the concave structure 139 increases the effective length of the fasteners, ensuring a reliable connection between the cover 113 and the mounting base 130, and allowing for a smaller total thickness of the cover 113 and the mounting base 130.

[0184] When setting the bayonet structure 140c, referring to Figures 6 to 8, an elastic telescopic mechanism can be used to reduce the risk of deformation failure of the buckle 121 and the bayonet structure 140c under stress. The bayonet structure 140c may include a sliding fastener 141 and an elastic element 142. The sliding fastener 141 is movably mounted on the mounting base 130. One end of the elastic element 142 is opposite to the sliding fastener 141, and the other end of the elastic element 142 is opposite to the wall surface of the mounting base 130. The elastic element 142 is used to elastically extend and retract the sliding fastener 141. When the elastic element 142 is in the extended state, the sliding fastener 141 is in the extended position, and the spring-loaded assembly 140 is in the locked state (as shown in Figure 15) or the disengaged state (as shown in Figure 16). When the elastic element 142 is in the compressed state, the sliding fastener 141 is in the retracted position, and the spring-loaded assembly 140 is in the critical state (as shown in Figure 17).

[0185] The bayonet structure 140c, which combines a sliding fastener 141 and an elastic element 142, allows the elastic element 142 to expand and contract during the contact and fastening process between the sliding fastener 141 and the buckle 121. Under the action of the elastic element 142, the sliding fastener 141 can have a large sliding stroke. That is, the bayonet structure 140c has a large elastic stroke. Neither the sliding fastener 141 nor the buckle 121 is prone to deformation and failure under stress, thus making the buckle 100 more reliable and stable.

[0186] Referring to Figure 15, when the spring-loaded assembly 140 is in the locked state, i.e., the first part 140a (bayonet structure 140c) and the second part 140b (buckle 121) are engaged, the elastic element 142 on the mounting base 130 extends to its maximum length. The extended elastic element 142 causes the sliding fastener 141 to extend, and the extended sliding fastener 141 contacts and engages with the buckle 121. The first folding member 110 and the second folding member 120 remain closed.

[0187] Referring to Figure 16, when the snap fastener assembly 140 is in the separated state, i.e., the first part 140a (bayonet structure 140c) and the second part 140b (buckle 121) are separated, the elastic element 142 on the mounting base 130 extends to its maximum length. The extended elastic element 142 causes the sliding fastener 141 to extend, completely separating the sliding fastener 141 from the buckle 121. The first folding member 110 and the second folding member 120 remain open.

[0188] Referring to Figure 17, the critical state is an intermediate state between the locked and unlocked states. When the spring-loaded assembly 140 is in the critical state, the sliding fastener 141 and the latch 121 are in contact. The sliding fastener 141 compresses and stores energy in the elastic element 142 on the mounting base 130, reducing the length of the elastic element 142. By moving the latch 121 relative to the mounting base 130, the latch 121 and the sliding fastener 141 can be engaged or disengaged, and the elastic element 142 on the mounting base 130 can return to its maximum length.

[0189] The elastic element 142 can be an elastic structure such as a spring or a sheet.

[0190] When setting up the bayonet structure 140c with sliding fastener 141 and elastic element 142, there are several optional implementation methods. Two implementation methods are given as examples below.

[0191] The first type of bayonet structure 140c with a sliding fastener 141 and an elastic member 142 is implemented as follows: Referring to Figures 6 to 8, the sliding fastener 141 includes a sliding portion 1411 and a first fastening portion 1412. The sliding portion 1411 is slidably mounted on the mounting base 130. The sliding portion 1411 has two opposite ends along its sliding direction (i.e., the moving direction 141a of the sliding fastener 141). The first fastening portion 1412 is connected to one end of the sliding portion 1411, and the elastic member 142 is provided at the other end of the sliding portion 1411. The latch 121 can engage with the first fastening portion 1412.

[0192] The sliding fastener 141, which has a sliding portion 1411 and a first fastening portion 1412, can move along a predetermined direction on the mounting base 130. Referring to FIG16, the spring-loaded fastener assembly 140 is in the disengaged state. Under the action of the elastic member 142, the first fastening portion 1412 extends out of the clearance area 1131 of the cover portion 113, and the latch 121 and the extended first fastening portion 1412 are completely separated.

[0193] Referring to Figure 17, when the latch 121 and the first latch 1412 need to engage, the latch 121 is pushed into the first latch 1412. The latch 121 acts on the first latch 1412, causing the first latch 1412 to retract. The elastic element 142 compresses and stores energy, and the snap-fit ​​assembly 140 is in a critical state. Referring to Figure 15, the latch 121 is further pushed into the first latch 1412, causing the latch 121 and the first latch 1412 to engage. The elastic element 142 extends and releases energy, causing the first latch 1412 to extend, and the snap-fit ​​assembly 140 is in a locked state.

[0194] The bayonet structure 140c, which is formed by the cooperation of the sliding fastener 141 and the elastic element 142, allows the sliding fastener 141 to elastically expand and contract during the contact and engagement process between the buckle 121 and the sliding fastener 141. The bayonet structure 140c has a large elastic stroke, making the buckle 121 and the sliding fastener 141 less prone to deformation and failure under stress, thus ensuring the high reliability of the buckle 100.

[0195] In the sliding direction of the sliding portion 1411 (i.e., the moving direction 141a of the sliding fastener 141), the cross-sectional shape of the sliding portion 1411 matches the cross-sectional shape of the mounting groove 131 of the mounting base 130, allowing the sliding portion 1411 to be slidably mounted on the mounting base 130 in a predetermined direction. For example, in the sliding direction of the sliding portion 1411, both the cross-sectional shape of the sliding portion 1411 and the cross-sectional shape of the mounting groove 131 are rectangular. The sliding portion 1411 can be cuboid or other shapes. The first fastener 1412 can be sheet-like, L-shaped, or other shapes.

[0196] In order to limit the range of movement of the sliding part 1411, in some embodiments, referring to Figures 6 and 8, the mounting base 130 has a first stop 133, which is used to abut against the sliding part 1411 to limit the sliding part 1411; the first stop 133 has an opening 134 for the first buckle 1412 to extend out.

[0197] Referring to Figures 15 and 17, when the spring-loaded assembly 140 is in the locked or unlocked state, the extended elastic element 142 acts on the sliding part 1411, causing the sliding part 1411 to abut against the first stop wall 133, thus defining the position of the sliding part 1411. The first latch 1412 can extend through the opening 134. The extended first latch 1412 and the latch 121 can maintain a snap-fit ​​engagement or be separated.

[0198] For example, referring to Figures 6 and 8, the first buckle 1412 includes a first segment and a second segment, which are L-shaped and connected to each other. The first segment is connected to the sliding part 1411, and the second segment is used to engage with the buckle 121. The L-shaped first buckle 1412 has good structural strength, improving the reliability of the first buckle 1412. Under the action of the elastic member 142, the sliding part 1411 abuts against the first baffle 133, the first segment is located at the opening 134, and the second segment extends out of the opening 134.

[0199] In order to limit the elastic element 142 on the sliding part 1411, in some embodiments, referring to Figures 6, 8 and 15, the sliding fastener 141 further includes a first limiting part 1413, which is connected to one end of the sliding part 1411 opposite to the first fastener 1412, and one end of the elastic element 142 is mounted on the first limiting part 1413.

[0200] During the compression or extension of the elastic member 142, one end of the elastic member 142 remains mounted on the first limiting part 1413 and abuts against the sliding part 1411, reducing the possibility of the elastic member 142 disengaging from the sliding part 1411 and improving the reliability of the engagement between the sliding fastener 141 and the elastic member 142.

[0201] For example, the elastic element 142 is a compression spring. The first limiting part 1413 can be a columnar structure provided on the sliding part 1411, and the compression spring is sleeved on the columnar structure. Alternatively, the first limiting part 1413 can also be a positioning hole provided on the sliding part 1411, and one end of the compression spring extends into the positioning hole.

[0202] In order to increase the elastic force of the elastic element 142 in the limited space of the mounting base 130, in some embodiments, referring to Figures 6 and 8, the sliding part 1411 is provided with a plurality of elastic elements 142, and the mounting base 130 has a partition wall 135, and two adjacent elastic elements 142 are separated by the partition wall 135.

[0203] Multiple short elastic elements 142 are arranged side by side on the small mounting base 130, allowing the multiple elastic elements 142 to cooperate with the sliding part 1411, thereby increasing the elastic force on the sliding part 1411. The partition wall 135 on the mounting base 130 isolates two adjacent elastic elements 142, preventing interference between the two elastic elements 142 during use and improving the reliability and stability of the bayonet structure 140c.

[0204] To facilitate the insertion of the buckle 121 into the bayonet structure 140c, in some embodiments, referring to FIG17, the head 1212 of the buckle 121 has a first guide surface 121a. During the process of the first folding member 110 and the second folding member 120 switching from open to closed, the first guide surface 121a is used to slide in contact with the first buckle portion 1412 so that the snap fastener assembly 140 switches from the separated state to the critical state.

[0205] During the process of pressing the snap-on assembly 140 to push the snap 121 into the bayonet structure 140c, the first guide surface 121a of the snap 121 head 1212 and the first snap part 1412 slide into contact, allowing the first snap part 1412 to switch from the extended position to the retracted position, while the elastic element 142 switches from the extended position to the compressed position. That is, the snap-on assembly 140 switches from the separated state (as shown in Figure 16) to the critical state (as shown in Figure 17), making it convenient for the user to push the snap 121 into the bayonet structure 140c. The first guide surface 121a can be an arc-shaped surface or other smooth curved surface. Continuing to press the snap-on assembly 140 to fully push the snap 121 into the bayonet structure 140c, the elastic element 142 extends, causing the first snap part 1412 to extend, so that the snap 121 and the bayonet structure 140c are engaged (as shown in Figure 15).

[0206] In order to facilitate the disengagement of the buckle 121 from the bayonet structure 140c, in some embodiments, referring to FIG15, the buckle 121 has a second guide surface 121b in the middle. During the process of the first folding member 110 and the second folding member 120 switching from closed to open, the second guide surface 121b is used to slide in contact with the first buckle part 1412 so that the snap fastener assembly 140 switches from the locked state to the critical state.

[0207] During the process of pulling open the latch 121 to disengage it from the bayonet structure 140c, the second guide surface 121b in the middle of the latch 121 slides into contact with the first latch portion 1412, allowing the first latch portion 1412 to switch from an extended position to a retracted position, while the elastic element 142 switches from an extended position to a compressed position. That is, the snap-lock assembly 140 switches from a locked state (as shown in Figure 15) to a critical state (as shown in Figure 17), making it convenient for the user to disengage the latch 121 from the bayonet structure 140c. The second guide surface 121b can be an arc-shaped surface or other smooth curved surface. Continuing to pull open the latch 121 to completely disengage it from the bayonet structure 140c, the elastic element 142 extends, causing the first latch portion 1412 to extend, completely separating the latch 121 from the bayonet structure 140c (as shown in Figure 16).

[0208] For example, referring to Figures 7 and 15, the buckle 121 includes a columnar portion 1211 and a head 1212. The head 1212 is connected to one end of the columnar portion 1211, and the other end of the columnar portion 1211 is connected to the fourth end 120b of the second folding member 120. The end of the head 1212 away from the columnar portion 1211 has a first guide surface 121a. The side of the head 1212 facing the columnar portion 1211 has a second guide surface 121b.

[0209] To achieve a reliable connection between the buckle 121 and the bayonet structure 140c, in some embodiments, referring to Figures 6, 8, and 15, the bayonet structures 140c are arranged in pairs, with the first buckle portions 1412 of the paired bayonet structures 140c facing each other at intervals, and the elastic extension and retraction directions of the paired bayonet structures 140c are opposite. The buckle 121 includes a columnar portion 1211 and a head 1212, with the head 1212 connected to one end of the columnar portion 1211, and the other end of the columnar portion 1211 connected to the fourth end 120b of the second folding member 120. When the first folding member 110 and the second folding member 120 are closed, the columnar portion 1211 is located between the paired first buckle portions 1412, and the head 1212 abuts against the paired first buckle portions 1412.

[0210] Referring to Figure 16, when the snap fastener assembly 140 is in the separated state, the elastic elements 142 in the two latch structures 140c act on the corresponding sliding fasteners 141 respectively, causing the two sliding fasteners 141 to push out towards each other, and the two sliding fasteners 141 are spaced apart.

[0211] Referring to Figure 17, the buckle 121 is pushed between the first buckle portions 1412 of the two sliding fasteners 141. The two sliding fasteners 141 move in opposite directions and act on the corresponding elastic members 142, causing the two elastic members 142 to compress in opposite directions, so that the spring buckle assembly 140 is in a critical state.

[0212] Referring to Figure 15, continue pushing the buckle 121 between the first latching portions 1412 of the two sliding fasteners 141. Under the action of the two elastic members 142, the corresponding sliding fasteners 141 move towards each other, causing the two sliding fasteners 141 to be pushed out. The two first latching portions 1412 abut against the head 1212 of the buckle 121, putting the spring-loaded buckle assembly 140 into a locked state. The engagement of the same buckle 121 with the paired bayonet structures 140c improves the connection reliability of the spring-loaded buckle assembly 140.

[0213] To minimize the space occupied by the buckle structure 140c in the mounting base 130, in some embodiments, referring to Figures 8 and 15, the moving direction 141a of the sliding fastener 141, the telescoping direction of the elastic member 142, and the length direction 130a of the mounting base 130 are parallel. The length direction 130a of the mounting base 130 can be the width direction of the fixing strap of the wearable device 1000.

[0214] The moving direction 141a of the sliding fastener 141 and the telescopic direction of the elastic member 142 are set along the length direction 130a of the mounting base 130, making full use of the space in the length direction 130a of the mounting base 130, so that the width dimension of the mounting base 130 can be made smaller.

[0215] For example, the mounting base 130 is generally cuboid in shape, the length direction 130a of the mounting base 130 is the width direction of the fixing strap, the width direction of the mounting base 130 is the extension direction of the fixing strap, and the thickness direction of the mounting base 130 is the thickness direction of the fixing strap.

[0216] In other embodiments, the moving direction 141a of the sliding fastener 141 is parallel to the telescopic direction of the elastic member 142, and the moving direction 141a of the sliding fastener 141 and the length direction 130a of the mounting base 130 can form a predetermined angle, for example, the moving direction 141a of the sliding fastener 141 and the length direction 130a of the mounting base 130 are perpendicular.

[0217] The second type of bayonet structure 140c with sliding fastener 141 and elastic element 142 is implemented as follows: Referring to Figures 18 to 23, the mounting base 130 has a mounting hole 136; the sliding fastener 141 includes a button part 1414 and a second fastener part 1416. The button part 1414 is slidably mounted on the mounting base 130 and exposed at the mounting hole 136. The second fastener part 1416 is connected to the button part 1414. The elastic element 142 is provided on the side of the button part 1414 away from the mounting hole 136. Referring to Figure 24, the buckle 121 can be engaged with the second fastener part 1416.

[0218] The sliding fastener 141, which has a button portion 1414 and a second latch portion 1416, can move along a predetermined direction on the mounting base 130, and the button portion 1414 can be adjusted in position by pressing. Referring to FIG25, the spring-loaded fastener assembly 140 is in the disengaged state, and the second latch portion 1416 extends under the action of the elastic member 142, and the button portion 1414 is exposed to the mounting hole 136, and the snap fastener 121 and the extended second latch portion 1416 are completely separated.

[0219] Referring to Figure 26, when the latch 121 and the second latch 1416 need to engage, pressing the button 1414 causes the second latch 1416 to retract inward, compressing and storing energy in the elastic element 142, pushing the latch 121 into the second latch 1416, and placing the spring-loaded assembly 140 in a critical state. Referring to Figure 24, continuing to push the latch 121 into the second latch 1416 allows the latch 121 and the second latch 1416 to engage, and the elastic element 142 extends and releases energy, causing the second latch 1416 to extend, and the spring-loaded assembly 140 to be in a locked state.

[0220] Referring to Figure 26, when it is necessary to separate the latch 121 and the second latch 1416, the button 1414 is pressed, and the second latch 1416 retracts inward along with the button 1414. The elastic element 142 is compressed and stores energy, allowing the latch 121 to separate the second latch 1416. Referring to Figure 25, after the latch 121 separates the second latch 1416 and the button 1414 is released, the elastic element 142 extends and releases energy, causing the button 1414 to return to the mounting hole 136, and the second latch 1416 extends out.

[0221] The latch structure 140c, which is formed by the cooperation of the sliding fastener 141 and the elastic element 142, allows the sliding fastener 141 to elastically expand and contract during the contact and engagement process between the buckle 121 and the sliding fastener 141. The latch structure 140c has a large elastic stroke, making the buckle 121 and the sliding fastener 141 less prone to deformation and failure under stress, thus ensuring the high reliability of the buckle 100.

[0222] Referring to Figures 18 and 19, in the sliding direction of the button portion 1414 (i.e., the moving direction 141a of the sliding fastener 141), the cross-sectional shape of the button portion 1414 matches the cross-sectional shape of a portion of the mounting groove 131 in the mounting base 130, allowing the button portion 1414 to slide linearly onto the mounting base 130 in a predetermined direction. For example, in the sliding direction of the button portion 1414, both the cross-section of the button portion 1414 and the cross-sectional shape of a portion of the mounting groove 131 are rectangular. The button portion 1414 can be approximately cuboid or other shapes. The second fastener 1416 can be strip-shaped or other shapes.

[0223] In order to limit the movement range of the button part 1414, in some embodiments, referring to FIG18 and FIG19, the sliding fastener 141 further includes a second limiting part 1417, which is connected to the button part 1414. The mounting base 130 has a second baffle 137, which is used to abut against the second limiting part 1417 to limit the button part 1414.

[0224] When the spring-loaded assembly 140 is in the locked or disengaged state, the extended elastic member 142 acts on the button portion 1414, causing the second limiting portion 1417 to abut against the second stop wall 137, thus limiting the position of the button portion 1414 and preventing it from detaching from the mounting base 130. The second limiting portion 1417 may be an outwardly protruding structure provided on the button portion 1414, and the outwardly protruding structure abuts against the second stop wall 137.

[0225] To facilitate the installation of the elastic element 142, in some embodiments, referring to Figures 18 and 19, the button portion 1414 has a receiving groove 1415 on the side away from the mounting hole 136, and the elastic element 142 is at least partially disposed within the receiving groove 1415. Disposing the elastic element 142 in the receiving groove 1415 of the button portion 1414 reduces the space occupied by the elastic element 142 on the mounting base 130, and facilitates the positioning and installation of one end of the elastic element 142 on the button portion 1414.

[0226] To facilitate the insertion of the latch 121 into the bayonet structure 140c, in some embodiments, referring to Figures 25 and 26, the head 1212 of the latch 121 has a third guide surface 121c. During the process of switching from open to closed of the first folding member 110 and the second folding member 120, the third guide surface 121c is used to slide into contact with the second latch portion 1416 so that the snap fastener assembly 140 switches from the separated state (as shown in Figure 25) to the critical state (as shown in Figure 26).

[0227] During the process of pressing the snap-on assembly 140 to push the snap 121 into the bayonet structure 140c, the third guide surface 121c of the snap 121 head 1212 and the second snap part 1416 slide into contact, allowing the second snap part 1416 to switch from the extended position to the retracted position, while the elastic element 142 switches from the extended position to the compressed position. That is, the snap-on assembly 140 switches from the separated state to the critical state, making it convenient for the user to push the snap 121 into the bayonet structure 140c. The third guide surface 121c can be an inclined surface, an arc surface, or other smooth curved surface. Continuing to press the snap-on assembly 140 to fully push the snap 121 into the bayonet structure 140c, the elastic element 142 extends, causing the second snap part 1416 to extend out of the clearance area 1131 of the cover 113, so that the snap 121 and the bayonet structure 140c are engaged (as shown in Figure 24).

[0228] In order to arrange a long button portion 1414 on the mounting base 130 in a small space, in some embodiments, referring to Figures 18, 19 and 22, the moving direction 141a of the sliding fastener 141 is parallel to the telescopic direction of the elastic member 142, and the moving direction 141a of the sliding fastener 141 is perpendicular to the length direction 130a of the mounting base 130.

[0229] The moving direction 141a of the sliding fastener 141 and the extension direction of the elastic member 142 are both set perpendicular to the length direction 130a of the mounting base 130. By making full use of the space in the length direction 130a of the mounting base 130, the button part 1414 in the sliding fastener 141 can be made relatively long, making it convenient for users to press the button part 1414.

[0230] For example, the mounting base 130 is generally cuboid in shape, the length direction 130a of the mounting base 130 is the width direction of the fixing strap, the width direction of the mounting base 130 is the extension direction of the fixing strap, and the thickness direction of the mounting base 130 is the thickness direction of the fixing strap.

[0231] In other embodiments, the moving direction 141a of the sliding fastener 141 is parallel to the telescopic direction of the elastic member 142, and the moving direction 141a of the sliding fastener 141 and the length direction 130a of the mounting base 130 can form a predetermined angle. For example, the moving direction 141a of the sliding fastener 141 and the length direction 130a of the mounting base 130 are parallel.

[0232] When setting the latch structure 140c, referring to Figures 27 to 34, elastic deformation can be used to reduce the failure of the latch 121 and the latch structure 140c under stress deformation. The latch structure 140c may include a flexible bending spring 143, which has a slot 1431 with a variable opening width 1432. Referring to Figures 28(b) and (c), when the latch assembly 140 is in the locked or disengaged state, the opening width 1432 of the slot 1431 is a first width 1432a. Referring to Figure 28(d), when the latch assembly 140 is in a critical state, the opening width 1432 of the slot 1431 is a second width 1432b; the first width 1432a is smaller than the second width 1432b.

[0233] The buckle structure 140c with the bending spring 143 is adopted. During the contact and fastening process between the bending spring 143 and the buckle 121, the bending spring 143 can be bent and deformed. The bending spring 143 can have a large amount of elastic deformation. Neither the bending spring 143 nor the buckle 121 is easy to deform and fail under force, so the reliability and stability of the buckle 100 are high.

[0234] Referring to Figure 28(b), when the spring-loaded assembly 140 is in the locked state, i.e., the first part 140a (bayonet structure 140c) and the second part 140b (buckle 121) are engaged, the width of the slot 1431 opening 1432 of the bent spring piece 143 (i.e., the first width 1432a) is small, and the bent spring piece 143 and the buckle 121 are in contact and engaged. The first folding member 110 and the second folding member 120 remain closed.

[0235] Referring to Figure 28(c), when the spring-loaded assembly 140 is in the separated state, i.e., the first part 140a (jaw structure 140c) and the second part 140b (buckle 121) are separated, the width of the slot 1431 opening 1432 of the bent spring 143 (i.e., the first width 1432a) is small, and the bent spring 143 and the buckle 121 are completely separated. The first folding member 110 and the second folding member 120 remain open.

[0236] Referring to (d) in Figure 28, the critical state is an intermediate state between the locked state and the unlocked state. When the spring-loaded assembly 140 is in the critical state, the width of the opening 1432 of the slot 1431 of the bent spring 143 (i.e., the second width 1432b) is relatively large. By moving the snap fastener 121 relative to the mounting base 130, the snap fastener 121 and the slot 1431 of the bent spring 143 can be engaged or disengaged.

[0237] When setting the bayonet structure 140c in the form of a bent spring 143, there are several possible implementation methods. Two implementation methods are given as examples below.

[0238] The first type of bayonet structure 140c in the form of a bent spring 143 is implemented as follows: Referring to Figures 27 to 34, the bent spring 143 includes a first horizontal arm 143a, a first inclined arm 143b, a second inclined arm 143c, a second horizontal arm 143d, a third inclined arm 143e, a fourth inclined arm 143f, and a third horizontal arm 143g connected in sequence. The first horizontal arm 143a, the second horizontal arm 143d, and the third horizontal arm 143g are flush and disposed on the mounting base 130. The first inclined arm 143b and the second inclined arm 143c are arranged in parallel. The third inclined arm 143e and the fourth inclined arm 143f are arranged in parallel. The second inclined arm 143c and the third inclined arm 143e are spaced apart. A slot 1431 is formed between the second inclined arm 143c and the third inclined arm 143e. Referring to Figure 28(b), when the snap fastener assembly 140 is in the locked state, and the buckle 121 is located between the second tilting arm 143c and the third tilting arm 143e, the second tilting arm 143c and the third tilting arm 143e respectively abut against the opposite sides of the buckle 121.

[0239] The aforementioned bending spring 143 can be formed by bending a sheet-like spring (such as a stainless steel sheet), which is easy to manufacture. Referring to Figure 28(c), in the initial state of the bending spring 143, the second tilting arm 143c, the third tilting arm 143e, and the second transverse arm 143d are arranged in a roughly triangular shape. The end of the second tilting arm 143c away from the second transverse arm 143d and the end of the third tilting arm 143e away from the second transverse arm 143d are spaced close together, and the width of the opening 1432 of the slot 1431 (i.e., the first width 1432a) is relatively small. Referring to Figure 28(d), when the latch 121 is just pushed into the slot 1431 of the bent spring 143, the latch 121 acts on the second tilting arm 143c and the third tilting arm 143e, causing the second tilting arm 143c and the third tilting arm 143e to open to both sides. The second tilting arm 143c moves with the first tilting arm 143b, and the fourth tilting arm 143f moves with the third tilting arm 143e. The width of the opening 1432 of the slot 1431 (i.e., the second width 1432b) is relatively large. Referring to Figure 28(b), when the latch 121 is fully pushed into the slot 1431 of the bent spring 143, the latch 121 is limited by the second tilting arm 143c and the third tilting arm 143e, thus achieving the locking of the latch 121 and the bent spring 143.

[0240] When a cover 113 is provided on the mounting base 130 and the cover 113 has a clearance area 1131, referring to Figures 29 and 30, the slot 1431 of the bent spring 143 is provided corresponding to the clearance area 1131 of the cover 113. The first tilting arm 143b and the second tilting arm 143c are located on one side of the clearance area 1131, and the third tilting arm 143e and the fourth tilting arm 143f are located on the other side of the clearance area 1131. The first transverse arm 143a and the third transverse arm 143g are limited by the cover 113.

[0241] Referring to Figure 28(a), a rounded corner can be provided between the first tilting arm 143b and the second tilting arm 143c, and a rounded corner can be provided between the third tilting arm 143e and the fourth tilting arm 143f, so that the head 1212 of the buckle 121 and the rounded corner area can slide into contact, thereby enabling the head 1212 of the buckle 121 and the slot 1431 of the bent spring 143 to engage.

[0242] The second type of bayonet structure 140c in the form of a bent spring 143 is implemented as follows: Referring to Figures 35 to 42, the bent spring 143 includes a sheet-like portion 143h, a first cantilever 143i, and a second cantilever 143j. The sheet-like portion 143h is disposed on the mounting base 130. One end of the first cantilever 143i is connected to the sheet-like portion 143h, and one end of the second cantilever 143j is connected to the sheet-like portion 143h. The first cantilever 143i and the second cantilever 143j are spaced apart, and a slot 1431 is formed between the first cantilever 143i and the second cantilever 143j. Referring to Figure 36(b), when the spring buckle assembly 140 is in the locked state, and the buckle 121 is located between the first cantilever 143i and the second cantilever 143j, the first cantilever 143i and the second cantilever 143j respectively abut against the opposite sides of the buckle 121.

[0243] The aforementioned bending spring 143 can be formed by bending a sheet-like spring (such as a stainless steel sheet), making it easy to manufacture. Referring to Figure 36(c), in the initial state of the bending spring 143, a groove 1431, wider at the bottom and narrower at the top, is formed between the first cantilever 143i and the second cantilever 143j. The free ends of the first cantilever 143i and the second cantilever 143j are positioned close together, and the opening 1432 of the groove 1431 (i.e., the first width 1432a) is relatively small. Referring to Figure 36(d), when the latch 121 is just pushed into the groove 1431 of the bending spring 143, the latch 121 acts on the first cantilever 143i and the second cantilever 143j, causing the first cantilever 143i and the second cantilever 143j to open to both sides, resulting in a larger opening 1432 of the groove 1431 (i.e., the second width 1432b). Referring to Figure 36(b), when the buckle 121 is fully pushed into the slot 1431 of the bent spring 143, the buckle 121 is limited by the first cantilever 143i and the second cantilever 143j, thereby achieving the locking of the buckle 121 and the bent spring 143.

[0244] For the above two types of bendable spring clips 143, referring to Figures 28 and 36, the buckle 121 includes a columnar portion 1211 and a head 1212. The head 1212 is connected to one end of the columnar portion 1211, and the other end of the columnar portion 1211 is connected to the fourth end 120b of the second folding member 120. In the width direction of the opening 1432 of the slot 1431, the width 1212a of the head 1212 is greater than the width 1211a of the columnar portion 1211, and the width 1212a of the head 1212 is greater than the first width 1432a.

[0245] The snap fastener 121, having a columnar portion 1211 and a head 1212, is easy to form and can engage with the bent spring 143. The width of the head 1212 of the snap fastener 121 is set to be greater than the width of the opening 1432 of the slot 1431 in the locked or disengaged state (i.e., the first width 1432a), so that when the snap fastener 121 engages with the slot 1431 of the bent spring 143, the snap fastener 121 and the bent spring 143 remain locked, and when the snap fastener 121 disengages from the slot 1431 of the bent spring 143, the two are completely separated.

[0246] For the two types of buckle structures 140c of the above-mentioned bending spring 143, referring to Figures 28 and 36, in order to facilitate the buckle 121 being pushed into the bending spring 143, in some embodiments, the head 1212 has a fourth guide surface 121d on the side away from the columnar portion 1211. During the process of the first folding member 110 and the second folding member 120 switching from open to closed, the fourth guide surface 121d is used to slide in contact with the bending spring 143 so that the spring buckle assembly 140 switches from the separated state to the critical state.

[0247] Referring to Figures 28(c) and (d), during the process of pressing the snap-fit ​​assembly 140 to push the snap 121 into the bent spring 143, the fourth guide surface 121d of the head 1212 of the snap 121 and the bent spring 143 slide into contact, which increases the width of the slot 1431 of the bent spring 143. That is, the snap-fit ​​assembly 140 switches from the separated state to the critical state, making it convenient for the user to push the snap 121 into the bent spring 143. The fourth guide surface 121d can be an arc surface or other smooth curved surface. Referring to Figure 28(b), if the snap-fit ​​assembly 140 is pressed further to fully push the snap 121 into the bent spring 143, the width of the opening 1432 of the slot 1431 of the bent spring 143 decreases, so that the snap 121 and the bent spring 143 engage.

[0248] For the two types of bayonet structures 140c with bent spring 143 mentioned above, referring to Figures 28 and 36, in order to facilitate the buckle 121 to disengage from the bent spring 143, in some embodiments, the head 1212 has a fifth guide surface 121e near the columnar portion 1211. During the process of the first folding member 110 and the second folding member 120 switching from closed to open, the fifth guide surface 121e is used to slide in contact with the bent spring 143 so that the bayonet structure 140c switches from the locked state to the critical state.

[0249] Referring to Figures 28(b) and (d), during the process of pulling open the latch 121 to disengage it from the bent spring 143, the fifth guide surface 121e of the head 1212 of the latch 121 slides into contact with the bent spring 143, which increases the width of the slot 1431 of the bent spring 143. This means the latch assembly 140 switches from the locked state to the critical state, facilitating the user to disengage the latch 121 from the bent spring 143. The fifth guide surface 121e can be an arc-shaped surface or other smooth curved surfaces. Referring to Figure 28(c), as the latch 121 continues to be pulled open to completely disengage it from the bent spring 143, the width of the opening 1432 of the slot 1431 of the bent spring 143 decreases, completely separating the latch 121 and the bent spring 143.

[0250] Understandably, in the case of the second type of spring-loaded assembly, the first part 140a on the mounting base 130 is a snap fastener, and the second part 140b on the fourth end 120b of the second folding member 120 is a latch structure. The latch structure and the snap fastener can engage. Compared to the first type of spring-loaded assembly 140, the second type of spring-loaded assembly 140 interchanges the positions of the snap fastener and the latch structure. Correspondingly, the fourth end 120b of the second folding member 120 serves as the carrier of the latch structure and can be provided with a structure adapted to the latch structure. For example, the fourth end 120b of the second folding member 120 can be provided with a mounting groove so that the latch structure is located in the mounting groove. The specific structure of the second type of spring-loaded assembly can be referred to the embodiment of the first type of spring-loaded assembly 140 described above.

[0251] For example, the latch structure can employ elastic expansion and contraction to reduce the likelihood of deformation failure under stress. The latch structure may include a sliding fastener and an elastic element. The sliding fastener is movably mounted on the fourth end 120b of the second folding member 120. One end of the elastic element is positioned opposite the sliding fastener, and the other end is positioned opposite the wall surface of the fourth end 120b of the second folding member 120. The elastic element is used to elastically expand and contract the sliding fastener. When the elastic element is in the extended state, the sliding fastener is in the extended position, and the snap-fit ​​assembly 140 is in the locked or disengaged state. When the elastic element is in the compressed state, the sliding fastener is in the retracted position, and the snap-fit ​​assembly 140 is in a critical state. During the contact and fastening process between the sliding fastener and the latch, the sliding fastener can have a large sliding stroke under the action of the elastic element. Neither the sliding fastener nor the latch is prone to deformation failure under stress, resulting in high reliability and stability of the buckle 100.

[0252] For example, the sliding fastener includes a sliding portion and a first fastening portion. The sliding portion is slidably mounted on the fourth end 120b of the second folding member 120. The sliding portion has two opposite ends along its sliding direction. The first fastening portion is connected to one end of the sliding portion, and an elastic element is provided at the other end of the sliding portion. The buckle can be engaged with the first fastening portion. With the cooperation of the sliding fastener and the elastic element, during the contact and engagement process between the buckle and the sliding fastener, the elastic element allows the sliding fastener to elastically expand and contract, making it less prone to deformation and failure under stress. Therefore, the buckle 100 has high reliability.

[0253] Understandably, when setting the first fixing strap 200, the second fixing strap 300, and the buckle 100, the first implementation method of the first fixing strap 200, the second fixing strap 300, and the buckle 100 as shown in Figures 1 and 2 can be adopted, or the second implementation method of the first fixing strap 200, the second fixing strap 300, and the buckle 100 as shown in Figure 4 can be adopted.

[0254] When configuring the first arc plate 111 and the second arc plate 122, the first implementation method of the first arc plate 111 and the second arc plate 122 shown in Figures 6 and 10 can be adopted, or the second implementation method of the first arc plate 111 and the second arc plate 122 shown in Figure 14 can be adopted.

[0255] When setting the snap fastener assembly 140, the first implementation method of the snap fastener assembly 140 shown in Figures 6 and 7 can be adopted (the first part 140a is the bayonet structure 140c, and the second part 140b is the buckle 121), or the second implementation method of the snap fastener assembly 140 can be adopted (the first part 140a is the buckle 121, and the second part 140b is the bayonet structure 140c).

[0256] When setting the bayonet structure 140c, either elastic expansion or elastic deformation can be used. Specifically, the elastic expansion method can be the first type of bayonet structure 140c with sliding fastener 141 and elastic element 142 as shown in Figures 6 to 8, or the second type of bayonet structure 140c with sliding fastener 141 and elastic element 142 as shown in Figures 18 to 23. Specifically, the elastic deformation method can be the first type of bayonet structure 140c in the form of a bent spring 143 as shown in Figures 27 to 34, or the second type of bayonet structure 140c in the form of a bent spring 143 as shown in Figures 35 to 42.

[0257] The various implementation methods for the different components mentioned above can be freely selected and combined as needed.

[0258] For example, in one embodiment of the watch buckle, a first type of snap fastener assembly 140 and a first type of bayonet structure 140c having a sliding fastener 141 and an elastic element 142 are used.

[0259] In another embodiment of the watch buckle, a first type of snap fastener assembly 140 is used, as well as a second type of bayonet structure 140c having a sliding fastener 141 and an elastic element 142.

[0260] In another embodiment of the buckle, a second type of snap fastener assembly 140 is adopted, as well as a first type of bayonet structure 140c having a sliding fastener 141 and an elastic element 142.

[0261] For example, in an embodiment of a watch strap or wearable device, the implementation of the first fixing strap 200, the second fixing strap 300 and the watch buckle 100 as shown in Figures 1 and 2, the implementation of the first snap fastener assembly 140, and the implementation of the first buckle structure 140c with a sliding buckle 141 and an elastic member 142 are adopted.

[0262] In another embodiment of the watch strap or wearable device, the second implementation of the first fixing strap 200, the second fixing strap 300 and the watch buckle 100 as shown in FIG4 is adopted, the second implementation of the snap fastener assembly 140 is adopted, and the first implementation of the bayonet structure 140c having a sliding buckle 141 and an elastic member 142 is adopted.

[0263] In another embodiment of the watch strap or wearable device, the first fixing strap 200, the second fixing strap 300 and the watch buckle 100, as shown in Figures 1 and 2, the first snap fastener assembly 140, and the first buckle structure 140c in the form of a bent spring 143 are adopted.

[0264] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A watch clasp comprising: a first folding element, a second folding element, a mounting base and an elastic engagement unit, wherein the first folding element has a first end and a second end opposite each other, wherein the first end is secured to the mounting base; the second folding element has a third end and a fourth end opposite each other, wherein the second end and the third end are connected with the possibility of rotation to provide the possibility of closing or opening the first folding element and the second folding element, wherein the elastic engagement unit comprises a first part located on the mounting base, and a second part located on the fourth end; when the first folding element and the second folding element are closed, the first part and the second part of the elastic engagement unit are engaged; and when the first folding element and the second folding element are open, the first part and the second part of the elastic engagement unit are disconnected.

2. A watch clasp according to claim 1, wherein the first folding member comprises a first arcuate plate, and the second folding member comprises a second arcuate plate, wherein two opposite ends of the first arcuate plate are respectively a first end and a second end, and two opposite ends of the second arcuate plate are respectively a third end and a fourth end, and wherein the second end and the third end are rotatably connected by means of a pivot pin; wherein when the first folding element and the second folding element are closed, the first arcuate plate and the second arcuate plate are located along the direction of the rotary pin, and the directions of passage of the first arcuate plate and the second arcuate plate coincide.

3. A watch clasp according to claim 2, wherein there is a plurality of first arc-shaped plates, wherein the plurality of first arc-shaped plates are arranged at a distance from each other along the direction of the pivot pin, and wherein when the first folding element and the second folding element are closed, at least one second arc-shaped plate is arranged between the plurality of first arc-shaped plates.

4. A watch clasp according to any one of claims 1 to 3, wherein the first part is an engagement structure and the second part is an engagement element.

5. A watch clasp according to claim 4, wherein the first end of the first folding element is provided with a closing section, wherein the closing section is secured to a mounting base, wherein the closing section and the mounting base form a mounting groove, wherein the engagement structure is located in the mounting groove, wherein the closing section has a free area for opening a portion of the engagement structure.

6. A watch clasp according to claim 4 or 5, wherein the engagement structure comprises a sliding engagement element and an elastic element, wherein the sliding engagement element is movably mounted on a mounting base, wherein one end of the elastic element is located opposite the sliding engagement element, and the other end of the elastic element is located opposite a wall surface of the mounting base, wherein the elastic element is configured to cause the sliding engagement element to extend and elastically compress; wherein when the elastic element is in a stretched state, the sliding engagement element is in an extended position, and the elastic engagement unit is in a coupled state or in a disconnected state; and when the elastic element is in a compressed state, the sliding element of the engagement is in a retracted position, and the elastic engagement unit is in a critical state.

7. A watch clasp according to claim 6, wherein the sliding engagement element comprises a sliding portion and a first engagement portion, wherein the sliding portion is mounted with the possibility of sliding on a mounting base, wherein the sliding portion has two opposite ends along the direction of sliding of the sliding portion, wherein the first engagement portion is connected to one end of the sliding portion, and the elastic element is located at the other end of the sliding portion, wherein the engagement element is configured to engage with the first engagement portion.

8. A watch clasp according to claim 7, wherein the mounting base has a first limiting wall, wherein the first limiting wall is configured to abut against the sliding portion and interact with it to limit the sliding portion, wherein the first limiting wall has an opening through which the first engaging portion passes.

9. A watch clasp according to claim 7 or 8, wherein the sliding engagement element further comprises a first limiting portion, wherein the first limiting portion is connected to an end of the sliding portion facing away from the first engagement portion, and wherein one end of the elastic element is mounted on the first limiting portion.

10. A watch clasp according to any one of paragraphs 7-9, in which a plurality of elastic elements are located on the sliding section, wherein the mounting base has a dividing wall, and wherein two adjacent elastic elements are separated by the dividing wall.

11. A watch clasp according to any one of paragraphs 7-10, in which the head portion of the engagement element has a first guide surface, wherein during the process of transferring the first folding element and the second folding element from the open state to the closed state, the first guide surface is configured to slide into contact with the first engagement portion to transfer the elastic engagement assembly from the disengaged state to the critical state; and / or the middle section of the engagement element has a second guide surface, wherein during the process of transferring the first folding element and the second folding element from the closed state to the open state, the second guide surface is designed with the possibility of sliding contact with the first engagement section to transfer the elastic engagement unit from the engaged state to the critical state.

12. A watch clasp according to any one of paragraphs 7-11, in which the direction of movement of the sliding engagement element, the direction of stretching and compression of the elastic element and the direction of the length of the mounting base are parallel to each other.

13. A watch clasp according to claim 6, wherein the mounting base has a mounting hole, wherein the sliding engagement element comprises a pressing portion and a second engagement portion, wherein the pressing portion is mounted with the possibility of sliding on the mounting base and is open in the mounting hole, wherein the second engagement portion is connected to the pressing portion, wherein the elastic element is located on the side of the pressing portion remote from the mounting hole, wherein the engagement element is configured to engage with the second engagement portion.

14. The watch clasp of claim 13, wherein the sliding engagement member further comprises a second limiting portion, wherein the second limiting portion is connected to the pressing portion, and wherein the mounting base has a second limiting wall, wherein the second limiting wall is configured to abut and interact with the second limiting portion to limit the pressing portion.

15. A watch clasp according to claim 13 or 14, wherein the side of the pressing portion remote from the mounting hole has a receiving groove, and the elastic element is at least partially located in the receiving groove.

16. A watch clasp according to any one of paragraphs 13-15, in which the head section of the engagement element has a third guide surface, wherein during the process of transferring the first folding element and the second folding element from the open state to the closed state, the third guide surface is designed with the possibility of sliding contact with the second engagement section to transfer the elastic engagement unit from the disengaged state to the critical state.

17. A watch clasp according to any one of paragraphs 13-16, in which the direction of movement of the sliding engagement element is parallel to the direction of extension and compression of the elastic element, while the direction of movement of the sliding engagement element is perpendicular to the direction of the length of the mounting base.

18. A watch clasp according to claim 4 or 5, wherein the engagement structure comprises a bent leaf spring that is elastically deformable, and the bent leaf spring has a clamping groove with a gap of variable width; wherein when the elastic engagement unit is in the engaged state or in the disengaged state, the clearance width of the clamping groove is the first width; and when the elastic engagement unit is in a critical state, the clearance width of the clamping groove is the second width, and the first width is smaller than the second width.

19. The watch clasp of claim 18, wherein the bent leaf spring comprises a first transverse section, a first inclined section, a second inclined section, a second transverse section, a third inclined section, a fourth inclined section and a third transverse section connected in series, wherein the first transverse section, the second transverse section and the third transverse section are at the same level and are located on a mounting base, wherein the first inclined section and the second inclined section are located in parallel, and also the third inclined section and the fourth inclined section are located in parallel, wherein the second inclined section and the third inclined section are located at a distance from each other, wherein a clamping groove is formed between the second inclined section and the third inclined section; wherein when the elastic engagement unit is in the engaged state, and the engagement element is located between the second inclined section and the third inclined section, the second inclined section and the third inclined section respectively rest against two opposite sides of the engagement element.

20. A watch clasp according to claim 18, wherein the bent leaf spring comprises a leaf section, a first console and a second console, wherein the leaf section is located on a mounting base, wherein one end of the first console is connected to the leaf section, and also one end of the second console is connected to the leaf section, wherein the first console and the second console are located at a distance from each other, wherein a clamping groove is formed between the first console and the second console; wherein when the elastic engagement unit is in the engaged state, and the engagement element is located between the first console and the second console, the first console and the second console respectively rest against two opposite sides of the engagement element.

21. A watch clasp according to any one of claims 18 to 20, wherein the engaging member comprises a columnar portion and a head portion, wherein the head portion is connected to one end of the columnar portion and the other end of the columnar portion is connected to a fourth end of the second folding member; wherein in the direction of the width of the clearance of the clamping groove, the width of the head section is greater than the width of the columnar section, and the width of the head section is greater than the first width.

22. The watch clasp of claim 21, wherein the side of the head portion remote from the columnar portion has a fourth guide surface, wherein during the process of transferring the first folding element and the second folding element from the open state to the closed state, the fourth guide surface is configured to slide into contact with the bent leaf spring to transfer the elastic engagement unit from the disconnected state to the critical state; and / or in the location of the head section, located next to the columnar section, a fifth guide surface is provided, wherein in the process of transferring the first folding element and the second folding element from the closed state to the open state, the fifth guide surface is designed with the possibility of sliding contact with the bent leaf spring for transferring the engagement structure from the engaged state to the critical state.

23. A watch clasp according to any one of paragraphs 1-22, in which the fourth end of the second folding element is provided with a fixed loop, and the fixed loop is intended for the fastening strap to pass through it; wherein the middle part of the second folding element is provided with a fastening section, and the fastening section is designed with the possibility of engaging and interacting with the fastening hole of the fastening strap.

24. A watch strap comprising a first fastening strap, a second fastening strap and a watch clasp according to any one of paragraphs 1-23, wherein one end of the first fastening strap is rotatably connected to a mounting base, and the second fastening strap is mounted on the second folding element in a detachable manner; wherein when the second fastening strap is installed on the second folding element, and wherein the first folding element and the second folding element are closed, the first folding element and the second folding element are located on the inner side of the first fastening strap or on the inner side of the second fastening strap.

25. A watch strap according to claim 24, wherein the fourth end of the second folding element is provided with a fixed loop, and the middle section of the second folding element is provided with a fastening section, and the second fastening strap has a plurality of fastening holes located along the direction of passage of the second fastening strap, and the free end of the second fastening strap is configured to pass through the fixed loop, and the fastening section is configured to engage with one of the fastening holes.

26. A wearable device comprising a device housing and a watch strap according to claim 24 or 25, wherein one end of the first fastening strap, remote from the mounting base, is connected to the device housing, and one end of the second fastening strap is connected to the device housing.