CN212754590U

CN212754590U - Watch buckle capable of adjusting tightness of watchband and watch

Info

Publication number: CN212754590U
Application number: CN202020899599.8U
Authority: CN
Inventors: 裘里斯杨; 魏礼
Original assignee: Ruixin Hardware Heyuan Co ltd
Current assignee: Ruixin Hardware Heyuan Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-03-23
Anticipated expiration: 2030-05-25

Abstract

The utility model provides a watch buckle capable of adjusting the tightness of a watchband and a watch, wherein the watch buckle capable of adjusting the tightness of the watchband comprises a buckle making base, a surface cover and a telescopic component used for assembling a tail bead of the watchband, one end of the surface cover is pivoted on the buckle making base, and two side walls of the surface cover are respectively provided with a sawtooth structure arranged along the length direction of the surface cover; the telescopic assembly comprises a lug spring device and a lock catch switch, wherein two ends of the lug spring device respectively protrude out of two side surfaces of the surface strip tail bead and are clamped on a sawtooth structure of the surface cover so as to fix the surface strip tail bead to the surface cover; two ends of the ear spring device are driven by the lock catch switch to contract and separate from the sawtooth structure, and the telescopic assembly and the watchband tail bead slide in the surface cover along the length direction. The utility model discloses can strengthen the controllability of watchband elasticity to be favorable to carrying out adjustment by a wide margin to the length of watchband, improved the practicality of use.

Description

Watch buckle capable of adjusting tightness of watchband and watch

Technical Field

The embodiment of the utility model provides a relate to the wrist-watch field, more specifically say, relate to a table of adjustable watchband elasticity is detained and wrist-watch.

Background

A wristwatch, also called a wristwatch, refers to an instrument worn on the wrist for timing and displaying time. Watches are generally made of leather, rubber, nylon cloth, stainless steel, etc. to form a band for holding a watch face displaying time on the wrist.

The watchband of present wrist-watch is many to be detained through the table and is connected, by the activity of table knot, changes the tip distance of two watchbands, makes wearing that the wrist-watch can be light tighten on human wrist. However, because there is the difference in the size of human wrist, consequently for making the watchband elasticity of wrist-watch adapt to the wrist of the person of wearing, current wrist-watch is mostly through detaining at the table and add the structure of adjusting the watchband elasticity, and the person of wearing of being convenient for accomplishes the adjustment of watchband length by oneself manually to improve the convenience of using.

However, the structure of the adjustable watchband tightness arranged on the current watch buckle is complex, the capability of adjusting the tightness of the watchband is weak, and the length of the watchband cannot be adjusted in a large range, so that the practicability of use is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a to the above-mentioned current table the structure of detaining more complicated, the ability of adjustable watchband elasticity is weaker, can't carry out the lower problem of practicality of adjustment and use on a large scale to the length of watchband, provide a table of adjustable watchband elasticity is detained and wrist-watch.

The embodiment of the utility model provides a solve above-mentioned technical problem's technical scheme is, provide a table of adjustable watchband elasticity and detain, detain base, face lid and be used for assembling the flexible subassembly to watchband tail pearl including the system, wherein: one end of the face cover is pivotally connected and fixed on the buckle making base through a first pin shaft, and the inner sides of two side walls of the face cover, which are protruded towards the buckle making base, are respectively provided with a sawtooth structure arranged along the length direction of the face cover;

the telescopic assembly comprises a raw lug spring device and a lock catch switch used for driving two ends of the raw lug spring device to contract, wherein two ends of the raw lug spring device respectively protrude out of two side surfaces in the width direction of the surface belt tail bead and are clamped on saw tooth structures on two side walls of the surface cover so as to fixedly connect the surface belt tail bead to the surface cover; two ends of the ear spring device are driven by the lock catch switch to contract and separate from the sawtooth structure, and the telescopic assembly and the watchband tail bead slide in the surface cover along the length direction.

Preferably, the sawtooth structure comprises a guide surface, the guide surface faces the surface strip tail bead, and when the surface strip tail bead slides towards the direction of the first pin shaft, the guide surface presses two ends of the raw ear spring device to enable two ends of the raw ear spring device to contract; the included angle between the guide surface and the length direction of the surface cover is less than 45 degrees.

Preferably, the face cover comprises a cover main body and two sawtooth parts, wherein strip-shaped through grooves which are arranged in a penetrating mode are formed in the side walls of the two sides of the cover main body respectively, and each strip-shaped through groove is arranged in the length direction of the face cover respectively;

the side surfaces of the two saw tooth parts are respectively provided with saw teeth, and the two saw tooth parts are respectively assembled in the two strip-shaped through grooves of the cover main body in a mode that the saw teeth face to the inner side of the side wall, and form two saw tooth structures.

Preferably, the strip-shaped through groove is matched with the end part of the raw ear spring device, and when the sawtooth part is assembled to the strip-shaped through groove, the tooth tips of the sawteeth of the sawtooth part are flush with or embedded in the inner side surface of the side wall.

Preferably, inner side surfaces of the two side walls of the face cover are parallel, and when the surface band tail bead is assembled to the face cover, the inner side surfaces of the two side walls of the face cover are close to the two side surfaces in the width direction of the surface band tail bead.

Preferably, the ear generating spring device comprises an ear generating needle assembled on the tail bead of the watchband and telescopic members fixedly connected to two ear generating heads of the ear generating needle respectively, and the telescopic members on the two ear generating heads respectively protrude out of two side surfaces in the width direction of the tail bead of the watchband;

the tip of flexible component with sawtooth structure looks adaptation, just it is fixed through two to give birth to ear spring device flexible component joint the sawtooth structure of two lateral walls of face lid is last.

Preferably, the two telescopic members are respectively provided with a through hole which penetrates along an axial direction perpendicular to the ear generating needle, and the end parts of the two ear generating heads of the ear generating needle are respectively exposed out of the through holes of the two telescopic members;

the lock catch switch comprises two lock catch pieces which are respectively assembled in the two through holes, and the lock catch pieces are provided with annular grooves matched with the end parts of the ear generating needles; and drives the telescoping member to disengage the sawtooth structure when the catch member is actuated.

Preferably, one end of the locking fastener, which is far away from the surface cover, protrudes out of the bottom surface of the tail bead of the watchband, and the distance between the two locking fasteners is greater than the width of the buckle making base; when the face cover is rotationally buckled on the buckle making base around the first pin shaft, the two locking parts are respectively positioned on two sides of the buckle making base in the width direction and do not protrude out of the bottom surface of the buckle making base.

Preferably, the buckle making base comprises a making frame and a making core, the first ends of the making frame and the making core are pivotally connected and fixed through a second pin shaft, and the surface cover is pivotally connected and fixed at the second end of the making core through a first pin shaft; the core is buckled on the manufacturing frame through rotating around the second pin shaft, and the center of the width of the manufacturing frame is provided with a clearance groove position which is arranged along the length direction and is matched with the main body of the core; when the core making is buckled on the making frame, the main body of the core making is embedded in the clearance avoiding slot, and the lower surface of the core making is flush with the upper surface of the making frame.

The embodiment of the utility model also provides a watch, which comprises a watchband and the watch buckle as mentioned above; wherein: the watchband includes the tail pearl, the tail pearl has along the assembly hole site that the width direction of watchband runs through, just the flexible subassembly assembly of watchband is in the assembly hole site.

The utility model discloses table of adjustable watchband elasticity is buckled and wrist-watch has following beneficial effect: by arranging the sawtooth structure, the adjusting capability of the watch buckle for adjusting the tightness of the watchband can be effectively enhanced, so that the length of the watchband can be greatly adjusted, the watch buckle is suitable for the wrist of a wearer, and the practicability of use is further improved; and, through the mode of going into ear spring assembly joint to the sawtooth structure with watchband tail pearl fixed connection to face lid, can simplify the structural design that the table of adjustable watchband elasticity was buckled like this for overall structure is simple more reasonable, still can improve the convenience of adjusting the operation to watchband elasticity simultaneously.

Drawings

Fig. 1 is an exploded view of a watch buckle capable of adjusting the tightness of a watchband according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a watch buckle capable of adjusting the tightness of a watchband according to an embodiment of the present invention;

fig. 3 is a schematic bottom structure view of the watch buckle capable of adjusting the tightness of the watchband according to the embodiment of the present invention;

fig. 4 is an assembly operation diagram of the watch buckle capable of adjusting the tightness of the watchband provided by the embodiment of the present invention, wherein: FIG. (a) is a schematic structural view of a watch buckle which is to be assembled and can adjust the tightness of a watchband; FIG. (b) is a schematic view of the watch clasp in a first assembled state to adjust the tightness of the wristband; FIG. (c) is a schematic view of the watch buckle with adjustable tightness of the band in a second assembled state; FIG. d is a schematic view of the watch buckle with the band being adjustable in tension in a third assembled state.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, is the embodiment of the utility model provides a structure schematic diagram of the watch buckle of adjustable watchband elasticity, this watch buckle of adjustable watchband elasticity can be applied to the wrist-watch field. The watch buckle capable of adjusting the tightness of the watchband in the embodiment comprises a buckle making base 1, a face cover 2 and a telescopic assembly 3 which is assembled to a tail bead 5 of the watchband. Of course, the telescopic assembly 3, instead of being directly assembled on the tail bead 5 of the watch band, can also be connected to the watch band by being assembled to a driving element for movement, and can be specifically determined according to the structural design of the watch band.

Referring to fig. 2 and 3, one end of the surface cover 2 is pivotally connected to the buckle making base 1 through a first pin 4, so that the surface cover 2 can be rotatably buckled to the buckle making base 1 around the first pin 4 or separated from the buckle making base 1 to expose the bottom of the surface cover 2. The center of one side (namely the bottom of the surface cover 2) of the surface cover 2 facing the button making base 1 is hollowed out, and two side walls which are respectively positioned at two sides of the width direction and protrude towards the button making base 1 are formed. In particular, the inner sides of the two side walls of the face cover 2 (i.e., the opposite sides of the two side walls) are respectively provided with a saw-tooth structure disposed along the length direction of the face cover 2. In practical applications, the length of the saw-tooth structures on both side walls is preferably uniformly arranged in a manner that is greater than half the length of the face cover 2.

Further, the telescopic assembly 3 comprises a raw ear spring device 31 and a locking switch, and the locking switch is connected with the raw ear spring device 31, and when the wearer drives the locking switch, two ends of the raw ear spring device 31 contract. The ear spring device 31 is specifically a device which can be extended and shortened by assembling and integrating the ear needle 311 as a core.

The two ends of the raw ear spring device 31 respectively protrude out of the two side surfaces of the width direction of the surface strip tail bead 5 and are respectively matched with the sawtooth structures of the two side walls of the surface cover 2, so that the two ends of the raw ear spring device 31 can be respectively clamped on the sawtooth structures of the two side walls. Because the assembly of the raw ear spring device 31 is on the watchband tail bead 5, when the raw ear spring device 31 is clamped to the sawtooth structure, the watchband tail bead 5 can be fixed on the face cover 2, and the assembly connection of the watchband and the watch buckle capable of adjusting the tightness of the watchband is realized.

As shown in fig. 4, when the watch is worn, the latch switch can be driven to retract the two ends of the ear spring device 31 and separate from the saw-tooth structures on the two side walls of the face cover 2, so that the tail bead 5 of the watch band and the telescopic member 3 can slide in the face cover 2 along the length direction of the face cover 2, so as to drive the watch band to be embedded into the face cover 2 and shorten the wearing length of the watch band, or drive the watch band to be separated from the face cover 2, and further increase the wearing length of the watch band, thereby achieving the function of adjusting the tightness of the watch band.

Above-mentioned table of adjustable watchband elasticity is detained and is set up the sawtooth structure through two lateral walls at face-piece 2, can effectively strengthen the table of above-mentioned adjustable watchband elasticity and detain the controllability to the wrist-watch watchband elasticity, and then can carry out adjustment on a large scale to the length of wearing of wrist-watch watchband, and the adaptability that makes the wrist-watch wear is stronger to be compatible with different wearers' wrist size, improve the practicality of using.

In addition, because the watch of above-mentioned adjustable watchband elasticity is buckled through the mode of coming the ear spring assembly 31 joint to the sawtooth structure with watchband tail pearl 5 fixed connection to face lid 2, can simplify the structural design that the watch of adjustable watchband elasticity was buckled like this greatly for overall structure is simple reasonable more, still can improve the convenience of adjusting the operation to the watchband elasticity simultaneously.

The utility model discloses an in an embodiment, the sawtooth structure on the face lid 2 all includes the guide surface that sets up towards watchband tail pearl 5, and when watchband tail pearl 5 slides towards first round pin axle 4 place direction, the guide surface extrusion of sawtooth structure gives birth to the both ends of ear spring device 31, thereby make the both ends shrink of giving birth to ear spring device 31, make the first round pin axle 4 place direction of orientation that watchband tail pearl 5 can be smooth and easy remove, when shortening the length of wearing of wrist-watch watchband, the person of wearing need not to drive the hasp switch, only need to grip the watchband then exert the power towards first round pin axle 4 place direction to ear ball 5, the sawtooth structure can not block and give birth to ear spring device 31 like this, but give birth to the both ends of ear spring device 31 by the balanced extrusion of spigot surface, make the both ends of giving birth to ear spring device 31 can continuously slide on the spigot surface of sawtooth structure.

In order to avoid the saw-tooth structure from catching the raw ear spring device 31 and from affecting the smoothness of the sliding of the two ends of the raw ear spring device 31 on the saw-tooth structure, it is preferable that the angle between the guide surface of each saw-tooth structure and the length direction of the face cover 2 is set to be less than 45 °.

Specifically, the face cover 2 includes a cover main body 21 and two saw teeth 22, wherein two side walls of the cover main body 21 (i.e. two side walls of the face cover 2 protruding toward the buckle base 1) are respectively provided with a strip-shaped through slot 211 penetrating therethrough, and each strip-shaped through slot 211 is respectively arranged along the length direction of the face cover 2.

The side of two sawtooth parts 22 is equipped with the sawtooth 221 respectively, and two sawtooth parts 22 assemble in two bar through grooves 211 of lid main part 21 with the inboard mode of sawtooth 221 orientation lateral wall respectively to constitute foretell two sawtooth structures, the sawtooth structure is mutually supported by sawtooth part 22 and bar through groove 211 and is formed, this simple structure is reliable, and the mode that adopts the components of a whole that can function independently assembly can effectively reduce the processing degree of difficulty of face lid 2, is favorable to maintaining the operation simultaneously. Of course, in practical application, the sawtooth structure may be formed by other structures, which may be determined according to practical situations, for example, the sawtooth structure is directly embedded in the two side walls, and the two side walls are fixed on the main body of the face cover 2 in a detachable assembly manner.

Preferably, the shape and size of each strip-shaped through groove 211 are adapted to the shape and size of the end of the raw ear spring device 31, so that the two ends of the raw ear spring device 31 can be limited by the two strip-shaped through grooves 211 respectively, the two ends of the raw ear spring device 31 are prevented from shaking or shifting to separate from the two sawtooth structures, and the stability and reliability of clamping and fixing the raw ear spring device 31 and the face cover 2 are ensured.

And, when sawtooth spare 22 assembles the logical groove 211 of bar, the prong of sawtooth 221 of sawtooth spare 22 is embedded in the medial surface of lateral wall to can make the both ends of giving birth to ear spring device 31 continuously the joint respectively in two logical grooves 211 of bar, easier strip that breaks away from is led to groove 211 when avoiding giving birth to the tip of ear spring device 31 and sliding the prong of sawtooth 221.

The medial surface of two lateral walls of face lid 2 is parallel to guarantee that surface strip tail pearl 5 can be in face lid 2 along the smooth and easy slip of the length direction of face lid 2. And, when watchband tail pearl 5 assembles face lid 2, the medial surface of two lateral walls of face lid 2 is pressed close to with two sides on the width direction of watchband tail pearl 5 mutually, not only can prevent that watchband tail pearl 5 from taking place to touch the friction with the lateral wall and causing wearing and tearing and the card pause, can also carry on spacingly to watchband tail pearl 5 through two lateral walls, rotatory dislocation when preventing watchband tail pearl 5 from removing along the length direction of face lid 2, and make the unable reliable and stable joint in two sawtooth structures in the both ends of giving birth to ear spring device 31.

In practical application, the saw-tooth structures on the two side walls of the face cover 2 are preferably symmetrically arranged, so that the stability and smoothness of the two ends of the raw ear spring device 31 and the two saw-tooth structures can be further improved.

In another embodiment of the present invention, the ear spring device 31 includes two telescopic members 312 fixedly connected to two ear heads 311a of the ear needle 311, and the two telescopic members 312 on the two ear heads 311a protrude out of two sides of the tail bead 5 of the watch band in the width direction. Further, the ends of the telescopic members 312 are adapted to the saw tooth structure, and the raw ear spring device 31 is fixed to the saw tooth structure of the two side walls of the face cover 2 by the two telescopic members 312.

The ear-growing needle 311 specifically includes a cylindrical case, a compression spring mounted in the cylindrical case, and two ear-growing heads 311a respectively disposed at both ends of the cylindrical case. Specifically, the raw lug 311a is provided with an external thread structure, the telescopic member 312 has a threaded hole matched with the external thread structure, and the telescopic member 312 is fixed on the raw lug 311a in a manner that the threaded hole is screwed to the external thread structure.

The two stretchable members 312 are respectively provided with through holes penetrating in the direction perpendicular to the axial direction of the ear generating needle 311, and when the two stretchable members 312 are respectively fitted to the two ear generating heads 311a of the ear generating needle 311, the end portions of the two ear generating heads 311a of the ear generating needle 311 are respectively exposed in the through holes of the stretchable members 312.

The latch switch includes two latch members 32, and the shape and size of the two latch members 32 are adapted to the shape and size of the through holes of the two telescopic members 312. The two locking components 32 are respectively provided with the annular grooves 321 which are matched with the end parts of the ear generating heads 311a, so that the two locking components 32 can be assembled and fixed in the through holes of the two telescopic members 312 in a mode that the annular grooves 321 are in clamping fit with the end parts of the ear generating needles 311, the matching structure of the locking components 32 and the telescopic members 312 is not needed, and the structural design can be simplified.

During the adjustment operation, the locking member 32 can be driven to synchronously drive the telescopic member 312 and the lug 311a to move, so that the telescopic member 312 is separated from the sawtooth structure, and the lug 311a contracts and presses the compression spring in the cylindrical shell to generate elastic deformation, so that when the locking member 32 stops being driven, the telescopic member 312 can be pushed by the compression spring to return to the original position, and the telescopic member 312 is clamped to the sawtooth structure again.

Specifically, the one end that face lid 2 was kept away from to hasp piece 32 is outstanding in the bottom surface of watchband tail pearl 5, and the distance between two hasp pieces 32 is greater than the width of system knot base 1, thereby when face lid 2 was detained to the system around the rotatory lock of first round pin axle 4, two hasp pieces 32 were located the ascending both sides of width direction of system knot base 1 respectively, conveniently drive the operation to hasp piece 32, and there is great clearance respectively between two hasp pieces 32 and the system knot base, do benefit to the drive removal of hasp piece 32, avoid limiting the drive formation of hasp piece 32.

In addition, in order to avoid the situation that the locking piece 32 is driven by misoperation, one end of the locking piece 32 far away from the face cover 2 should not protrude out of the bottom surface of the buckle making base 1, so as to ensure the wearing stability and reliability.

In particular, the buckle base 1 comprises a frame 11 and a core 12, wherein the first ends of the frame 11 and the core 12 are pivotally connected and fixed by a second pin 6, the face cover 2 is pivotally connected and fixed at the second end of the core 12 by a first pin 4, and the second end of the frame 11 is provided with a connecting structure for assembling another watch strap, that is, another watch strap can be fixedly connected to the second end of the frame 11. When the watch is worn, the face cover 2 can be attached to or separated from the second end of the core making 12 through rotating around the first pin shaft 4, and the second end of the core making 12 can be attached to or separated from the second end of the frame making 11 through rotating around the second pin shaft 6, so that the distance between the two watchbands of the watch can be changed, the wearing length of the watch can be increased or shortened, and the function of wearing and tightening can be achieved.

The frame 11 has a clearance groove position in the center in the width direction along the length direction, and the clearance groove position is matched with the main body of the core 12. Therefore, when the core 12 is buckled on the frame 11, the main body of the core 12 can be embedded in the clearance avoiding groove to reduce the thickness of the watch buckle capable of adjusting the tightness of the watchband, thereby reducing the volume.

The embodiment of the utility model provides a still provide a wrist-watch, this wrist-watch includes that watchband and foretell adjustable watchband elasticity's table are buckled, and wherein the watchband includes the tail pearl, and this tail pearl has the assembly hole site that runs through along the width direction of watchband, and the flexible subassembly 3 assembly of detaining of table of adjustable watchband elasticity is fixed in the assembly hole site of tail pearl.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a watch of adjustable watchband elasticity is buckled, its characterized in that detains base, face lid and is used for assembling to the flexible subassembly of watchband tail pearl including the system, wherein: one end of the face cover is pivotally connected and fixed on the buckle making base through a first pin shaft, and the inner sides of two side walls of the face cover, which are protruded towards the buckle making base, are respectively provided with a sawtooth structure arranged along the length direction of the face cover;

2. The watch buckle capable of adjusting the tightness of a watchband according to claim 1, wherein the sawtooth structure comprises a guide surface facing the tail bead of the watchband, and when the tail bead of the watchband slides in the direction of the first pin, the guide surface presses the two ends of the raw ear spring device to contract the two ends of the raw ear spring device; the included angle between the guide surface and the length direction of the surface cover is less than 45 degrees.

3. The watch buckle capable of adjusting the tightness of a watchband according to claim 1 or 2, wherein the face cover comprises a cover main body and two sawtooth pieces, strip-shaped through grooves penetrating through the side walls of the cover main body are respectively formed in the two side walls of the cover main body, and each strip-shaped through groove is respectively formed in the length direction of the face cover;

4. The watch buckle with adjustable tightness of watchband according to claim 3, wherein said elongated through groove is fitted to an end of said raw ear spring means, and when said saw-tooth member is fitted into said elongated through groove, a tip of a saw tooth of said saw-tooth member is flush with or embedded in an inner side surface of said side wall.

5. The watch buckle with adjustable tightness of watch band according to claim 1, wherein inner side surfaces of both side walls of said face cover are parallel, and when said watch band tail bead is fitted to said face cover, the inner side surfaces of both side walls of said face cover are adjacent to both side surfaces in a width direction of said watch band tail bead.

6. The watch buckle capable of adjusting the tightness of a watchband according to claim 1, wherein the lug spring device comprises lug generating needles assembled on the tail bead of the watchband and telescopic members fixedly connected to two lug generating heads of the lug generating needles respectively, and the telescopic members on the two lug generating heads respectively protrude out of two side surfaces in the width direction of the tail bead of the watchband;

7. The watch buckle capable of adjusting the tightness of a watchband according to claim 6, wherein the two telescopic members are respectively provided with through holes which penetrate along an axial direction perpendicular to the ear generating needles, and the end parts of the two ear generating heads of the ear generating needles are respectively exposed out of the through holes of the two telescopic members;

the lock catch switch comprises two lock catch pieces, the two lock catch pieces are respectively provided with an annular groove matched with the end part of the ear generating needle, and the two lock catch pieces are respectively fixed in the through holes of the two telescopic components in a mode of clamping and matching the annular grooves to the end parts of the ear generating needles; and the telescopic member is driven to be separated from the sawtooth structure by driving the lock catch piece.

8. The watch buckle with adjustable tightness of watchband according to claim 7, wherein one end of the locking piece away from the face cover protrudes out of the bottom surface of the tail bead of the watch band, and the distance between the two locking pieces is larger than the width of the buckle making base; when the face cover is rotationally buckled on the buckle making base around the first pin shaft, the two locking parts are respectively positioned on two sides of the buckle making base in the width direction and do not protrude out of the bottom surface of the buckle making base.

9. The watch buckle of claim 1, wherein the buckle base comprises a making frame and a making core, first ends of the making frame and the making core are pivotally fixed by a second pin, and the face cover is pivotally fixed at a second end of the making core by a first pin; the core is buckled on the manufacturing frame through rotating around the second pin shaft, and the center of the width of the manufacturing frame is provided with a clearance groove position which is arranged along the length direction and is matched with the main body of the core; when the core making is buckled on the making frame, the main body of the core making is embedded in the clearance avoiding slot, and the lower surface of the core making is flush with the upper surface of the making frame.

10. A wristwatch comprising a band and a clasp according to any one of claims 1 to 9 for adjusting the tightness of the band; wherein: the watchband includes the tail pearl, the tail pearl has along the assembly hole site that the width direction of watchband runs through, just the flexible subassembly assembly of the watch buckle of adjustable watchband elasticity is in the assembly hole site.