Automatic locking buckle and strap for adjusting the tightness of the strap

Abstract

The present invention provides a watch buckle and a watch for automatically locking and adjusting the tightness of a watchband, wherein the watch buckle includes a buckle base and a face cover, wherein the face cover is pivotally connected to the buckle base, and the watch buckle includes a buckle assembly and an elastic member, wherein the elastic member is mounted on the face cover, and the buckle assembly is pivotally connected to the face cover; the buckle assembly includes a locking position for inserting a watchband, a driving part and a hook part, wherein the hook part is provided with a hook structure, wherein the driving part is connected to the elastic member, and the hook structure is fixed to a slot or a hole of the watchband by pushing the elastic member, so as to lock the watchband in the face cover; the hook structure is separated from the slot or the hole by squeezing the elastic member by the driving part, so as to make the watchband perform telescopic movement along the length direction. The structure of the present invention is simple and reliable, and there are few parts, and it is convenient to disassemble and assemble, and it has high practicality.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of wearable devices, and more specifically, to a buckle and a strap that can automatically lock and adjust the tightness of the strap. Background Art

[0002] A watch, also known as a wristwatch, is an instrument worn on the wrist to tell time and display the time. Watches are usually made of leather, rubber, nylon, stainless steel and other materials to make a strap to tie the dial that displays the time to the wrist.

[0003] At present, in order to achieve adjustable strap length and facilitate users to quickly adjust the tightness of the strap to improve wearing comfort, most existing watches are equipped with a tension adjustment device for adjusting the strap length on the buckle. Since the length of the buckle is fixed, the wearing length can be adjusted by adjusting the overlapped part of the strap and the buckle, thereby adjusting the tightness of the strap.

[0004] However, the structure of the tension adjustment device of the existing watch is relatively complicated, which increases the difficulty of disassembling and assembling the watch buckle, resulting in low operating efficiency, and the fixed connection between the watch strap and the tension adjustment device on the watch buckle is usually not removable, which has low practicality. Summary of the invention

[0005] The embodiments of the present invention provide a watch buckle and a watch with automatic locking type for adjusting the tightness of the watch strap, in order to solve the problems that the clasp of the existing watch is difficult to assemble and disassemble, the efficiency is low, and the fixed connection between the watch strap and the clasp is non-detachable and has low practicality.

[0006] The technical solution of the embodiment of the present invention to solve the above technical problems is to provide a watch buckle for adjusting the tightness of the automatic locking type watch band, comprising a buckle base and a cover, one end of the cover is pivotally fixed to the buckle base through a first pin, the watch buckle for adjusting the tightness of the automatic locking type watch band also includes a locking assembly and an elastic member, and the elastic member is installed and fixed on the cover, and the locking assembly is pivotally fixed to the cover through a second pin; the locking assembly includes a locking position for inserting the watch band, and driving means disposed on both sides of the locking position. The watch strap comprises a watch part and a hook part, and the hook part is provided with a hook structure matched with a groove or a hole arranged on the watch strap along the length direction, the driving part is connected with the elastic part, and the driving part is driven to rotate by the pushing method of the elastic part, so that the hook structure is fixed to the groove or the hole of the watch strap to lock the watch strap in the face cover; the hook structure is separated from the groove or the hole by the driving part rotating around the second pin shaft to squeeze the elastic part, so that the watch strap can perform telescopic movement relative to the face cover and the locking position along the length direction.

[0007] Preferably, the lock assembly includes a crank member and a lock rod member, and the crank member is pivotally fixed to the face cover through the second pin shaft and constitutes the driving part; the lock rod member is pivotally fixed to the face cover through the second pin shaft and constitutes the hook part;

[0008] The crank member includes a crossbeam and two arms respectively arranged at both ends of the crossbeam. The crank member is pivotally connected to the two sides of the cover through the two arms, and the locking position is formed by the crossbeam, the two arms and the locking rod member.

[0009] Preferably, the free ends of the two arms are respectively provided with a first locking hole, and the two ends of the locking rod are respectively provided with a second locking hole; the side walls on both sides of the other end of the cover are respectively provided with pivot holes, and the distance between the two arms is greater than or equal to the distance between the side walls on both sides of the cover, and the length of the locking rod is less than or equal to the distance between the side walls on both sides of the cover;

[0010] The second pin shaft includes two pivot bolts, and the crank member and the locking rod member are pivotally fixed to the surface cover by means of the two pivot bolts passing through the first locking hole, the pivot hole and the second locking hole respectively.

[0011] Preferably, each of the pivot bolts includes a primary locking section adapted to the first locking hole, a pivot section adapted to the pivot hole, and a secondary locking section adapted to the second locking hole, and the outer diameter of the primary locking section is larger than the outer diameter of the pivot section, and the outer diameter of the pivot section is larger than the outer diameter of the secondary locking section; and when the crank member and the locking rod member are pivotally fixed to the face cover, the two pivot bolts limit and fix the crank member through the cooperation of the primary locking section and the first locking hole, and at the same time limit and fix the locking rod member through the cooperation of the secondary locking section and the second locking hole, so that no relative movement occurs between the crank member and the locking rod member.

[0012] Preferably, the first locking hole position includes a limiting hole with a plum blossom-shaped cross-section, the side of the primary locking section away from the pivot section has a locking head adapted to the limiting hole, and the crank handle member rotates synchronously with the pivot bolt by cooperating with the limiting hole and the locking head.

[0013] Preferably, the locking rod comprises an assembly hole provided on the outer wall, and a fastener installed in the assembly hole, and the assembly hole passes through the second locking hole position; the secondary locking section comprises an annular groove, and a first tooth pattern structure provided on the outer wall;

[0014] The second locking hole has a second tooth structure that is compatible with the first tooth structure, and the locking rod rotates synchronously with the pivot bolt by cooperating with the first tooth structure and the second tooth structure; and when the secondary locking section of the pivot bolt is inserted into the second locking hole, at least a portion of the fastener in the assembly hole is inserted into and clamped into the annular groove of the pivot bolt to lock the pivot bolt in the second locking hole.

[0015] Preferably, the locking rod member includes a main rod body, and the hook structure is L-shaped and vertically connected to the main rod body; a chamfered surface is provided on the side of the free end of the hook structure facing the locking position, and when the watch strap slides toward the direction where the face cover is located, the groove of the watch strap squeezes the chamfered surface, so that the rocker member rotates around the second pin shaft and squeezes the elastic member;

[0016] The crank member also includes a limiting pressure plate, and one end of the limiting pressure plate is fixedly connected to the cross beam; a snap position is provided on the bottom surface of the limiting pressure plate, and a limiting beam matched with the snap position and an avoidance groove arranged adjacent to the limiting beam are provided on the top surface of the face cover, and when the crank member is pushed by the elastic member to move toward the hook direction of the hook structure, the snap position of the limiting pressure plate is snapped to the limiting beam; when the crank member rotates around the second pin shaft to squeeze the elastic member, the limiting pressure plate is embedded in the avoidance groove.

[0017] Preferably, the elastic member comprises two piston springs, the end surface of the other end of the face cover is provided with two spring mounting holes arranged along the length direction, and at least a portion of the two piston springs are respectively installed and fixed in the two spring mounting holes.

[0018] Preferably, the buckle base comprises a frame, a first core and a second core, one end of the first core is pivotally fixed to the first end of the frame through a third pin, one end of the second core is pivotally fixed to the second end of the frame through a fourth pin, and the face cover is pivotally fixed to the other end of the second core through the first pin; the first core is buckled onto the frame by rotating around the third pin, and the second core is buckled onto the frame by rotating around the fourth pin;

[0019] The two sides of the center on the width of the frame respectively have a first avoidance groove arranged along the length direction and adapted to the main body of the first core, and a second avoidance groove adapted to the main body of the second core, and when the first core and the second core are respectively buckled onto the frame, the main body of the core is embedded in the first avoidance groove, and the main body of the second core is embedded in the second avoidance groove.

[0020] The present invention also provides a watch, comprising a first watch strap, a second watch strap and an automatic locking buckle for adjusting the tightness of the watch strap as described in any of the above items, wherein one end of the first watch strap is pivotally fixed to the buckle base, and one end of the second watch strap is inserted into the locking position of the buckle assembly; the inner side surface of the second watch strap has a groove or hole arranged along the length direction, and is fixedly connected to the face cover by buckling it to the groove or hole through the hook structure.

[0021] The automatic locking type watchband tightening and watch of the embodiment of the present invention have the following beneficial effects: by providing a locking assembly and an elastic member, and by the elastic member pushing the locking assembly, the watchband can be fixed in the face cover. The structure is simple and reliable, and does not cause the overall structure of the watchband to be complicated. The watchband can have fewer parts, which is convenient for disassembly and assembly, and improves operating efficiency. When the hook structure is separated from the groove or hole of the watchband, the watchband can be removed from the locking position to realize the separation operation between the watchband and the above-mentioned automatic locking type watchband tightening and buckle, which increases the wearing methods and has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the exploded structure of the automatic locking buckle for adjusting the tightness of a watch strap provided by an embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of a cross section of an automatic locking buckle for adjusting the tightness of a watch strap provided in an embodiment of the present invention;

[0024] Figure 3 The present invention is a schematic diagram of the assembly operation of the automatic locking type watch strap adjustment buckle provided in an embodiment of the present invention, wherein: Figure (a) is a schematic diagram of the structure of the automatic locking type watch strap adjustment buckle in a natural state; Figure (b) is a schematic diagram of the action of the driving part; Figure (c) is a schematic diagram of the cross-section of the strap extending and retracting; Figure (d) is a schematic diagram of the cross-section of the hook structure and the strap. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] like Figure 1 , which is a schematic diagram of the exploded structure of the automatic locking buckle for adjusting the tightness of a strap provided by an embodiment of the present invention. The automatic locking buckle for adjusting the tightness of a strap can be applied to the technical field of wearable devices, especially in watches. Figure 2As shown, the automatic locking type watch strap adjustment buckle in this embodiment includes a buckle base 1 and a cover 2, and one end of the cover 2 is pivotally fixed to the buckle base 1 through a first pin shaft 3. The cover 2 can be fastened to the buckle base 1 by rotating around the first pin shaft 3, or can be detached from the buckle base 1 by rotating around the first pin shaft 3 to increase or decrease the total length of the above-mentioned automatic locking type watch strap adjustment buckle.

[0027] Specifically, the above-mentioned automatic locking type watchband adjustment buckle also includes a locking assembly 4 and an elastic member 5 (such as a spring assembly), and the elastic member 5 is mounted and fixed on the cover 2, and the locking assembly 4 is pivotally fixed to the cover 2 through the second pin 6, that is, the locking assembly 4 can rotate relative to the cover 2 around the second pin 6, and the locking assembly 4 can abut against the elastic member 5 when rotating around the second pin 6. In practical applications, the locking assembly 4 is preferably pivotally fixed to the end of the cover 2 away from the buckle base 1 through the second pin 6, and the second pin 6 is arranged along a length direction perpendicular to the cover 2, so that the locking assembly 4 rotates around the width direction of the cover 2.

[0028] The lock assembly 4 of this embodiment includes a locking position for inserting the watchband, and a driving part and a hook part respectively arranged on both sides of the locking position, wherein the hook part is provided with a hook structure 421, and the hook structure 421 is adapted to the groove or hole arranged along the length direction of the watchband. In addition, the driving part is connected to the elastic member 5 to realize the interaction between the lock assembly 4 and the elastic member 5. Since the lock assembly 4 can rotate around the second pin 6, the elastic member 5 is preferably connected to the elastic member 5 in an abutting manner, which is conducive to the layout design of the elastic member 5 and enables the driving part and the elastic member 5 to be reliably connected.

[0029] Furthermore, when the driving part is connected to the elastic member 5, at least a portion of the hook structure 421 is inserted in front of the locking position along the length direction of the face cover 2 (i.e., the locking position faces the side of the face cover 2). Therefore, when the watch strap is inserted into the face cover 2 through the locking position, the hook structure 421 can be fixed to the groove (serrated groove) or hole (multiple through holes) of the watch strap, and because the driving part is continuously subjected to the elastic force of the elastic member 5, the hook structure 421 will not be separated from the groove or hole of the watch strap, so that the watch strap can be reliably locked in the face cover 2 and the locking position.

[0030] The shape and size of the locking position are compatible with the shape and size of the watchband, so that the watchband can be effectively limited, the stability of the watchband inserted into the cover 2 through the locking position is improved, and the watchband is prevented from moving, and at the same time, the hook part can be efficiently and reliably fixed to the slot or hole of the watchband. In addition, when the matching structure of the watchband is a sawtooth groove arranged along the length direction of the watchband, the hook structure 421 is a buckle structure compatible with the sawtooth groove; when the matching structure of the watchband is a plurality of through holes distributed along the length direction of the watchband, the hook structure 421 is a plug-in buckle structure compatible with the through holes.

[0031] Combination Figure 3 As shown, when performing the adjustment operation, force can be applied to the locking assembly 4 to make the driving part rotate around the second pin shaft 6 toward the elastic member 5, and overcome the elastic force to squeeze the elastic member 5, so that the hook structure 421 moves in the direction away from the face cover 2 to disengage from the locking position in the front along the length direction of the face cover 2. At this time, you only need to grab the watch strap and make the watch strap telescopic movement relative to the face cover 2 and the locking position along the length direction to adjust the length of the overlapping part of the watch strap and the face cover 2 until it is appropriately tight when worn. The thrust applied to the locking assembly 4 is canceled, so that the hook structure 421 is fixed to the groove or hole of the watch strap under the action of the elastic restoring force of the elastic member 5, thereby locking and fixing the watch strap.

[0032] The above-mentioned automatic locking type watchband adjustment buckle is provided with a locking component 4 and an elastic member 5, and the elastic member 5 pushes the locking component 4 to fix the watchband in the cover 2. The structure is simple and reliable, and the operation is convenient and quick. It does not cause the overall structure of the watchband to be complicated, and the watchband can have fewer parts, which is convenient for assembly and disassembly operations, and can effectively improve the operation efficiency. In addition, when the hook structure 421 is separated from the slot or hole of the watchband, the watchband can be removed from the locking position, thereby realizing the separation operation between the watchband and the above-mentioned automatic locking type watchband adjustment buckle, which increases the wearing method and has high practicality.

[0033] In one embodiment of the present invention, the lock assembly 4 includes a crank member 41 and a lock rod member 42, and the crank member 41 is pivotally fixed to the face cover 2 through the second pin 6, and constitutes the above-mentioned drive unit. In addition, the lock rod member 42 is pivotally fixed to the face cover 2 through the second pin 6, and constitutes the above-mentioned hook portion. Of course, in actual applications, the crank member 41 and the lock rod member 42 can also be assembled together and then pivotally fixed to the face cover 2 through the second pin 6, which can greatly reduce the difficulty of assembly and adopt a modular design and assembly; or, the crank member 41 and the lock rod member 42 can be integrally processed and formed, which can reduce the number of assembled parts and make the buckle structure simpler.

[0034] Specifically, the crank member 41 includes a crossbeam 411 and two arms 412, and the two arms 412 are integrally formed with the two ends of the crank member 41. Moreover, the crank member 41 is pivotally connected to the two sides of the face cover 2 through the two arms 412, so that the crank member 41 and the face cover 2 are pivotally fixed. In particular, the locking position is formed by the crossbeam 411, the two arms 412 and the locking rod member 42. The two arms 412 are parallel to each other, and the distance between the two arms 412 is greater than or equal to the width of the strap.

[0035] The free ends of the two arms 412 are respectively provided with first locking holes 413, the two ends of the locking rod 42 are respectively provided with second locking holes 423, and the side walls of the two sides of the end of the cover 2 away from the buckle-making base 1 are respectively provided with pivot holes 21. Further, the second pin 6 includes two pivot bolts 60, and the crank member 41 and the locking rod 42 are pivotally fixed to the cover 2 by inserting the two pivot bolts 60 into the first locking hole 413, the pivot hole 21 and the second locking hole 423 respectively. The above-mentioned pivoting method is the most preferred connection method between the crank member 41 and the locking rod 42 and the cover 2. Of course, the specific connection method between the crank member 41 and the locking rod 42 and the cover 2 can also be adjusted according to actual conditions.

[0036] In particular, the distance between the two arms 412 is greater than or equal to the distance between the two side walls of the face cover 2, and the length of the locking rod 42 is less than or equal to the distance between the two side walls of the face cover 2, that is, the locking member 42 can be arranged between the two side walls of the face cover 2, and the two arms 412 of the crank member 41 can be arranged outside the two side walls of the face cover 2, and then pivoted together through two pivot shafts. Since the locking rod 42 and the crank member 41 rotate around the second pin 6, the locking rod 42 and the crank member 41 are respectively arranged on both sides of the side wall of the face cover 2, so that the middle part of the pivot bolt 60 (pivotally connected to the two side walls of the face cover 2) can be stressed, and balanced stress can be achieved, so as to extend the service life of the pivot bolt 60 and avoid deformation or damage caused by unilateral stress.

[0037] Each pivot bolt 60 includes a primary locking section 61, a pivoting section 62, and a secondary locking section 63, which are sequentially distributed, and the primary locking section 61 is matched with the first locking hole 413, the pivoting section 62 is matched with the pivoting hole 21, and the secondary locking section 63 is matched with the second locking hole 423. Thus, the pivot bolt 60 can pivotally fix the crank member 41 and the lock rod member 42 on the cover 2 by the primary locking section 61 matching with the first locking hole 413, the pivoting section 62 matching with the pivoting hole 21, and the secondary locking section 63 matching with the second locking hole 423, while preventing relative movement between the crank member 41 and the lock rod member 42, so as to ensure that the hook portion can be synchronously driven to rotate when the driving portion rotates.

[0038] Furthermore, the outer diameter of the primary locking section 61 is greater than the outer diameter of the pivot section 62, and the outer diameter of the pivot section 62 is greater than the outer diameter of the secondary locking section 63, so that the two pivot bolts 60 can be respectively inserted through the first locking hole 413 of the support arm 412, and the secondary locking section 63 can be inserted into the second locking hole 423 of the locking rod 42 after passing through the first locking hole 413 and the pivot hole 21.

[0039] Since the first locking hole 413 includes a limiting hole with a plum blossom-shaped cross section, and the side of the primary locking section 61 away from the pivot section 62 has a locking head that matches the limiting hole, the crank member 41 can achieve synchronous connection (i.e., synchronous rotation) with the pivot bolt 60 through the matching of the limiting hole and the locking head, and the structure is simple and reasonable, and the connection is firm and reliable. Of course, in actual applications, the crank member 41 can also be synchronously connected with the pivot bolt 60 in other matching ways, which is determined according to actual conditions. For example, a card slot is provided in the primary locking section 61, and a top screw hole connected to the first locking hole 413 is provided on the outer wall of the support arm 412, and the top screw assembled in the top screw hole is locked and clamped into the card slot to achieve synchronous connection between the crank member 41 and the pivot bolt 60.

[0040] The locking rod 42 of this embodiment includes an assembly hole provided on the outer wall, and a fastener (such as a jackscrew) installed in the assembly hole, and the assembly hole penetrates to the second locking hole position 423, so that at least a portion of the fastener installed in the assembly hole can be inserted into the first locking hole position 413. In addition, the secondary locking section 63 includes an annular groove and a first thread structure provided on the outer wall, and the first thread structure is respectively arranged along the axial direction of the pivot bolt 60.

[0041] Furthermore, the second locking hole 423 has a second tooth structure, and the second tooth structure is compatible with the first tooth structure of the pivot bolt 60. Therefore, the locking rod 42 can be synchronously connected with the pivot bolt 60 (i.e., synchronously rotated) by cooperating with the first tooth structure and the second tooth structure to achieve pivotal fixation with the face cover 2. At the same time, synchronous connection with the crank member 41 is achieved through the pivot bolt 60, ensuring that the locking rod 42 can be driven to rotate while driving the crank member 41.

[0042] Since the crank member 41 is synchronously connected to the pivot bolt 60 by means of the cooperation between the limiting hole and the locking head, and the cross-section of the limiting hole is plum blossom-shaped, the relative position between the crank member 41 and the locking rod member 42 can be adjusted by adjusting the cooperation position between the limiting hole and the locking head, thereby effectively adjusting the hook direction of the hook structure 421.

[0043] In particular, when the secondary locking section 63 of the pivot bolt 60 is inserted into the second locking hole 423, at least a portion of the fastener in the assembly hole is inserted into and snapped into the annular slot of the pivot bolt 60 to lock and fix the pivot bolt 60 in the second locking hole 423. This connection method is firm and reliable, and can effectively prevent the secondary locking section 63 of the pivot bolt 60 from slipping out of the second locking hole 423, ensuring reliable cooperation between the first thread structure and the second thread structure. Since the secondary locking section 63 is provided with an annular slot, it is conducive to the efficient snapping of the fastener into the annular slot, thereby reducing the difficulty of assembly, and at the same time, the adjustment operation of the first thread structure and the second thread structure can be realized to adjust the relative position between the locking rod 42 and the pivot bolt 60.

[0044] In another embodiment of the present invention, the locking rod 42 includes a main rod body 422, and a hook structure 421 is vertically connected to the main rod body 422. The hook structure 421 is preferably L-shaped, so that the fixed part of the hook structure 421 and the watchband (i.e., the free end of the hook structure 421) can be away from the locking position, thereby increasing the moving stroke range of the fixed part of the hook structure 421, so that the hook structure 421 can be completely separated from the slot or hole of the watchband.

[0045] Specifically, the bottom surface of the above-mentioned watch strap is a serrated groove, and the free end of the above-mentioned hook structure 421 is provided with a chamfered inclined surface 421a on the side facing the locking position, and when the watch strap slides toward the direction where the face cover 2 is located, the serrated groove of the watch strap squeezes the chamfered inclined surface 421a, so that the crank member 41 can rotate around the second pin shaft 6 and overcome the elastic force to squeeze the elastic member 5 to open the hook structure 421. The watch strap can be tightened without driving the crank member 41, which greatly improves the convenience of operation.

[0046] In addition, the crank member 41 further includes a limiting pressure plate 414, and one end of the limiting pressure plate 414 is fixedly connected to the cross beam 411, and a buckle position 414a is provided on the bottom surface of the limiting pressure plate 414. In addition, a limiting beam 22 and an avoidance groove 23 are provided on the top surface of the face cover 2, wherein the limiting beam 22 and the avoidance groove 23 are arranged adjacent to each other, and the limiting beam 22 is adapted to the buckle position 414a. Therefore, when the crank member 41 moves toward the hook direction of the hook structure 421 under the pushing action of the elastic member 5, the buckle position 414a of the limiting pressure plate 414 is clipped onto the limiting beam 22 to restrict the rotation stroke of the crank member 41 in the direction away from the elastic member 5. In addition, when the crank member 41 rotates around the second pin 6 to squeeze the elastic member 5, the limiting pressure plate 414 is embedded in the avoidance groove 23 to prevent the limiting pressure plate 414 from abutting against the face cover 2, which causes the hook structure 421 to be unable to effectively detach from the slot or hole of the watchband. During operation, the crank member 41 can also be driven by pressing the limiting pressure plate 414, so that the crank member 41 squeezes the elastic member 5.

[0047] The elastic member 5 of this embodiment includes two piston springs, and the end surface of the other end of the cover 2 is provided with two spring mounting holes 24 arranged along the length direction, and the two spring mounting holes 24 are respectively adapted to the fixing parts of the two piston springs, so the two piston springs can be installed and fixed on the cover 2 by respectively assembling the fixing parts to the two spring mounting holes 24. In actual applications, the number of piston springs 2 can be determined according to actual conditions.

[0048] In particular, the buckle base 1 includes a frame 11, a first core 12 and a second core 13, and one end of the first core 12 is pivotally fixed to the first end of the frame 11 through a third pin 7, one end of the second core 13 is pivotally fixed to the second end of the frame 11 through a fourth pin 8, and the face cover 2 is pivotally fixed to the other end of the second core 13 through a first pin 3, whereby the first core 12 can be buckled onto the frame 11 by rotating around the third pin 7, and the second core 13 can be buckled onto the frame 11 by rotating around the fourth pin 8, so that the first core 12 and the second core 13 can be unfolded to increase the wearing length, and then the first core 12 and the second core 13 can be buckled onto the frame 11 to reduce the wearing length, thereby realizing the wearing function.

[0049] Preferably, the two sides of the center on the width of the frame 11 respectively have a first air avoidance groove and a second air avoidance groove arranged along the length direction, and the first air avoidance groove is adapted to the main body of the first core 12, and the second air avoidance groove is adapted to the main body of the second core 13. Therefore, when the first core 12 is buckled onto the frame 11, the main body of the first core 12 can be embedded in the first air avoidance groove, and when the second core 13 is buckled onto the frame 11, the main body of the second core 13 can be embedded in the second air avoidance groove. In this way, the volume of the buckle base 1 can be reduced while ensuring the structural strength of the frame 11, thereby avoiding affecting the wearing comfort.

[0050] The present invention also provides a watch, which includes a first watchband, a second watchband and the above-mentioned automatic locking watchband adjustment buckle, wherein one end of the first watchband is pivotally fixed to the buckle base 1, and one end of the second watchband is inserted into the locking position of the buckle assembly 4. In addition, the inner side surface of the second watchband has a groove or hole arranged along the length direction, and is fixedly connected to the cover 2 by buckling the hook structure 421 to the groove or hole.

[0051] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An automatic locking buckle for adjusting the tightness of a watchband, comprising a buckle base and a cover, wherein one end of the cover is pivotally fixed to the buckle base through a first pin. It is characterized in that The automatic locking type watch strap clasp for adjusting the tightness also includes a locking assembly and an elastic member, and the elastic member is installed and fixed on the face cover, and the locking assembly is pivotally fixed to the face cover by a second pin shaft; the locking assembly includes a locking position for inserting the watch strap, and a driving part and a hook part respectively arranged on both sides of the locking position, and the hook part is provided with a hook structure adapted to a groove or hole arranged on the length direction of the watch strap, the driving part is connected to the elastic member, and drives the driving part to rotate by pushing the elastic member, so that the hook structure is fixed to the groove or hole of the watch strap to lock the watch strap in the face cover; the hook structure is separated from the groove or hole by the driving part rotating around the second pin shaft to squeeze the elastic member, so that the watch strap can perform telescopic movement relative to the face cover and the locking position along the length direction.

2. The automatic locking buckle for adjusting the tightness of the strap according to claim 1, It is characterized in that The lock assembly includes a crank member and a lock rod member, and the crank member is pivotally fixed to the face cover through the second pin shaft and constitutes the driving part; the lock rod member is pivotally fixed to the face cover through the second pin shaft and constitutes the hook part; The crank member includes a crossbeam and two arms respectively arranged at both ends of the crossbeam. The crank member is pivotally connected to the two sides of the cover through the two arms, and the locking position is formed by the crossbeam, the two arms and the locking rod member.

3. The automatic locking buckle for adjusting the tightness of the strap according to claim 2, It is characterized in that The free ends of the two arms are respectively provided with a first locking hole, and the two ends of the locking rod are respectively provided with a second locking hole; the side walls on both sides of the other end of the cover are respectively provided with pivot holes, and the distance between the two arms is greater than or equal to the distance between the side walls on both sides of the cover, and the length of the locking rod is less than or equal to the distance between the side walls on both sides of the cover; The second pin shaft includes two pivot bolts, and the crank member and the locking rod member are pivotally fixed to the surface cover by means of the two pivot bolts passing through the first locking hole, the pivot hole and the second locking hole respectively.

4. The automatic locking buckle for adjusting the tightness of the strap according to claim 3, It is characterized in that Each of the pivot bolts includes a primary locking section adapted to the first locking hole, a pivot section adapted to the pivot hole, and a secondary locking section adapted to the second locking hole, and the outer diameter of the primary locking section is larger than the outer diameter of the pivot section, and the outer diameter of the pivot section is larger than the outer diameter of the secondary locking section; and when the crank member and the locking rod member are pivotally fixed to the face cover, the two pivot bolts limit and fix the crank member through the cooperation of the primary locking section and the first locking hole, and at the same time limit and fix the locking rod member through the cooperation of the secondary locking section and the second locking hole, so that no relative movement occurs between the crank member and the locking rod member.

5. The automatic locking buckle for adjusting the tightness of the strap according to claim 4, It is characterized in that The first locking hole position includes a limiting hole with a plum blossom-shaped cross-section, and the side of the primary locking section away from the pivot section has a locking head adapted to the limiting hole, and the crank handle member rotates synchronously with the pivot bolt by cooperating with the limiting hole and the locking head.

6. The automatic locking buckle for adjusting the tightness of a watch strap according to claim 4 or 5, It is characterized in that The locking rod comprises an assembly hole provided on the outer wall, and a fastener installed in the assembly hole, and the assembly hole passes through the second locking hole position; the secondary locking section comprises an annular groove, and a first tooth pattern structure provided on the outer wall; The second locking hole has a second thread structure that matches the first thread structure, and the locking rod rotates synchronously with the pivot bolt by the cooperation between the first thread structure and the second thread structure; When the secondary locking section of the pivot bolt is inserted into the second locking hole, at least a portion of the fastener in the assembly hole is inserted into and snapped into the annular groove of the pivot bolt to lock and fix the pivot bolt in the second locking hole.

7. The automatic locking buckle for adjusting the tightness of a watch strap according to claim 2, It is characterized in that The locking rod member includes a main rod body, and the hook structure is L-shaped and vertically connected to the main rod body; a chamfered surface is provided on a side of the free end of the hook structure facing the locking position, and when the watch strap slides toward the direction where the face cover is located, the groove of the watch strap squeezes the chamfered surface, so that the rocker member rotates around the second pin shaft and squeezes the elastic member; The crank member also includes a limiting pressure plate, and one end of the limiting pressure plate is fixedly connected to the cross beam; a snap position is provided on the bottom surface of the limiting pressure plate, and a limiting beam matched with the snap position and an avoidance groove arranged adjacent to the limiting beam are provided on the top surface of the face cover, and when the crank member is pushed by the elastic member to move toward the hook direction of the hook structure, the snap position of the limiting pressure plate is snapped to the limiting beam; when the crank member rotates around the second pin shaft to squeeze the elastic member, the limiting pressure plate is embedded in the avoidance groove.

8. The automatic locking buckle for adjusting the tightness of a watch strap according to claim 1, It is characterized in that The elastic member comprises two piston springs, the end surface of the other end of the face cover is provided with two spring mounting holes arranged along the length direction, and at least a part of the two piston springs are respectively installed and fixed in the two spring mounting holes.

9. The automatic locking buckle for adjusting the tightness of a watch strap according to claim 1, It is characterized in that The buckle making base comprises a making frame, a first making core and a second making core, one end of the first making core is pivotally fixed to the first end of the making frame through a third pin shaft, one end of the second making core is pivotally fixed to the second end of the making frame through a fourth pin shaft, and the face cover is pivotally fixed to the other end of the second making core through the first pin shaft; the first making core is buckled onto the making frame by rotating around the third pin shaft, and the second making core is buckled onto the making frame by rotating around the fourth pin shaft; The two sides of the center on the width of the frame respectively have a first avoidance groove arranged along the length direction and adapted to the main body of the first core, and a second avoidance groove adapted to the main body of the second core, and when the first core and the second core are respectively buckled onto the frame, the main body of the core is embedded in the first avoidance groove, and the main body of the second core is embedded in the second avoidance groove.

10. A watch, It is characterized in that It comprises a first watch strap, a second watch strap and an automatically locking buckle for adjusting the tightness of the watch straps as described in any one of claims 1 to 9, wherein one end of the first watch strap is pivotally fixed to the buckle base, and one end of the second watch strap is inserted into the locking position of the buckle assembly; the inner side surface of the second watch strap has a groove or a hole arranged along the length direction, and is fixedly connected to the face cover by buckling to the groove or hole through the hook structure.

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