CN219299038U - American damping hinge capable of being quickly disassembled and assembled - Google Patents

Abstract

The application provides a but quick assembly disassembly's American damping hinge, but this quick assembly disassembly's American damping hinge includes: a hinge cup structure; a connection structure; the connecting structure comprises a bending part, the bending part comprises an articulated arm installation area, the articulated arm installation area is provided with a first containing groove with a downward opening, the articulated arm installation area comprises a third shaft pin, the third shaft pin is bridged between two sides of the first containing groove, and the third shaft pin is positioned at the end part, far away from the hinge cup structure, of the articulated arm installation area; the hinge arm structure is accommodated in the first accommodating groove and is connected with the connecting structure; the hinge arm structure is provided with a chute with a downward opening; the hinge arm base comprises a pressing part, wherein the pressing part comprises a clamping piece. The technical scheme of this application can make American damping hinge can realize quick assembly disassembly, need not to dismantle the whole installation of hinge repeatedly when carrying out door, window dismouting, when reducing American damping hinge installation and dismantlement, promotes user experience.

Description

American damping hinge capable of being quickly disassembled and assembled

Technical Field

The application relates to the technical field of hinges, in particular to a American damping hinge capable of being quickly disassembled and assembled.

Background

Hinges are mechanical devices that connect two solids and allow relative rotation between the two. Hinges are installed in furniture such as doors, windows, and the like. However, the existing hinge is integrally and fixedly connected to the door and the window, and when the door and the window are separated and disassembled, the hinge is required to be repeatedly installed and disassembled, so that the time consumption is long and the inconvenience is high.

It should be noted that the foregoing is not necessarily prior art, and is not intended to limit the scope of the patent protection of the present application.

Disclosure of Invention

Embodiments of the present application provide a quick detachable american damping hinge to solve or alleviate one or more of the technical problems set forth above.

As an aspect of the embodiments of the present application, the embodiments of the present application provide a fast detachable american damping hinge, including:

a hinge cup structure;

the connecting structure is hinged with the hinge cup structure; the connecting structure comprises a bending part, the bending part comprises an arm installation area, the arm installation area comprises a third shaft pin and a first containing groove with a downward opening, the arm installation area further comprises a third shaft pin, the third shaft pin is bridged between two sides of the first containing groove, and the third shaft pin is located at the end part, far away from the hinge cup structure, of the arm installation area.

The hinge arm structure is accommodated in the first accommodating groove and is connected with the connecting structure; the hinge arm structure is provided with a chute with a downward opening;

the hinge arm base comprises a pressing part, wherein the pressing part comprises a clamping piece;

the hinge arm base is clamped into the sliding groove in an assembling state, the third shaft pin slides to the clamping piece and is clamped and fixed with the clamping piece, so that the hinge arm structure is fixedly connected with the hinge arm base, and in a disassembling state, the third shaft pin is separated from the clamping piece, so that the hinge arm structure is separated from the hinge arm base.

Optionally, the pressing part further includes:

a third torsion spring;

the fourth shaft pin is connected with the third torsion spring in series and is used for hinging the pressing part at one end of the hinge arm base;

under the action of external force, the clamping piece is rotated and opened by taking the fourth shaft pin as the shaft center, so that the third shaft pin is aligned with the clamping piece; and under the condition that the external force disappears, the buckling piece rotates back by taking the fourth shaft pin as the shaft center under the torsion action of the third torsion spring, so that the buckling piece is buckled and fixed with the third shaft pin.

Optionally, the hinge arm base further comprises a bottom plate;

the base plate includes: the hooks extend from the end part of the bottom plate far away from the hinge cup structure and are respectively positioned at two sides of the bottom plate; wherein, the upper edge of the hook forms a special-shaped concave cavity with an upward opening;

correspondingly, semicircular grooves are formed in the upper edges of the two sides of the buckle piece;

and in the assembled state, the special-shaped concave cavity and the semicircular groove form a fixing hole, and the fixing hole is used for fixing the third shaft pin.

Optionally, the hook is further provided with:

and the stop block is positioned on the inner side wall of the hook and used for resisting the pressing part.

Optionally, the hinge arm structure includes:

the first fixing plate is connected with the hinge arm installation area; the first fixing plate is provided with a second accommodating groove with a downward opening, and is also provided with a buckle, and the buckle is positioned on the bottom surface of the first fixing plate;

the second fixing plate is accommodated in the second accommodating groove; the buckle is used for limiting the second fixing plate to be separated from the second accommodating groove, so that the second fixing plate is connected with the first fixing plate.

Optionally, the hinge arm mounting area further includes: a second axis pin located in the hinge arm mounting region on a side proximate the hinge cup structure;

the two sides of the hinge arm installation area are also provided with: a first waist-shaped hole and a second waist-shaped hole;

the both sides of first fixed plate are equipped with: a seventh through hole and a first round hole;

the both sides of second fixed plate are equipped with: a second round hole and a third round hole;

the first waist-shaped hole, the seventh through hole and the second round hole are corresponding in position, and the second waist-shaped hole, the first round hole and the third round hole are corresponding in position; the second shaft pin sequentially penetrates through the first waist-shaped hole, the seventh through hole and the second round hole to bridge between two sides of the first accommodating groove, the third shaft pin sequentially penetrates through the second waist-shaped hole, the first round hole and the third round hole to bridge between two sides of the first accommodating groove, so that the hinge arm installation area, the first fixing plate and the second fixing plate are connected, and the connecting structure is connected with the hinge arm structure.

Optionally, the bottom plate is further provided with:

the U-shaped concave bayonets are respectively positioned on the side plates at two sides of the bottom plate and are positioned at one end of the side plate, which is close to the hinge cup structure; the opening of the U-shaped concave bayonet faces the hinge cup structure;

In the assembled state, the bottom plate is clamped into the sliding groove, and the second shaft pin and the U-shaped concave bayonet are clamped, so that the connecting structure and the hinge arm base are detachably connected together.

Optionally, the hinge arm mounting area is further provided with: a first aisle hole, an eighth through hole, and a third aisle hole;

correspondingly, the first fixing plate is provided with: the first through hole, the second through hole and the third through hole;

the second fixed plate is provided with: a fourth through hole and a fifth through hole;

the bottom plate is provided with: a sixth through hole;

the first passage hole, the first through hole, the fourth through hole and the sixth through hole are corresponding in position and are used for the self-tapping screw to pass through;

the eighth through hole is a waist-shaped hole, the eighth through hole is used for being slidably clamped into a nut of the first eccentric nail, the second through hole is used for being clamped into a screw rod of the first eccentric nail, and the first eccentric nail is used for adjusting the relative position relationship between the hinge arm installation area and the first fixing plate along a preset direction;

the third passageway hole, the third through hole and the fifth through hole correspond in position, the third through hole is a waist-shaped hole, the third through hole is used for being slidably clamped into a nut of the second eccentric nail, the fifth through hole is used for being clamped into a screw rod of the second eccentric nail, and the second eccentric nail is used for adjusting the relative position relationship between the first fixing plate and the second fixing plate along a preset direction.

Optionally, the hinge cup structure includes:

the hinge cup body is provided with a groove;

a damping device including a damper; the damper is positioned in the groove (111), one end of the damper faces the inner wall of the groove, and the other end of the damper faces one end of the connecting structure;

when the included angle between the hinge cup structure and the connecting structure is in a second range, the end parts of the damper respectively prop against the inner wall of the groove and the end parts of the connecting structure and generate damping force.

Optionally, the damping device further comprises: a press hoop and a switch; the pressing hoop is fixed above the groove and forms an accommodating space with the groove, and the accommodating space is used for limiting the movable range of the damper; a clamping groove is formed in one side of the pressing hoop; the switch is slidably positioned on the clamping groove and is provided with a downward convex column;

correspondingly, a protrusion part is arranged on the outer wall of the damper;

wherein the post contacts the protrusion when the switch is slid to the first range of positions and is separated from the protrusion when the switch is slid to the second range of positions.

The technical scheme adopted by the embodiment of the application can comprise the following advantages:

the hinge cup structure is hinged with the connecting structure, and the connecting structure is connected with the hinge arm structure, so that the hinge cup structure, the connecting structure and the hinge arm structure are positioned in a combined body. The hinge arm base is provided as a single component separate and removable from the assembly.

The installer can pre-install the hinge cup structure on the door or door frame and pre-install the hinge arm base to the door or door frame. Then, installer can cover the arm structure to the arm base above for the arm base is acceptd in the spout, and then presses the position at third pivot pin place, makes third pivot and buckle spare block, realizes quick installation from realizing American damping hinge. When the door is detached, an installer can press the pressing part, so that the clamping piece and the third shaft pin are separated, the American damping hinge is quickly detached, and then the door can be quickly detached from the corresponding door frame. It can be known that, the technical scheme of this application embodiment makes the American damping hinge of installing on furniture such as door, window can realize quick assembly disassembly to need not to dismantle the whole installation of hinge repeatedly when carrying out door, window dismouting, reduced American damping hinge installation and the time spent of dismantling, promote user experience.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not therefore to be considered limiting of its scope.

Fig. 1 is a schematic structural diagram of a fast detachable american damping hinge according to an embodiment of the present application.

Fig. 2 is an exploded view of a quick-release American damped hinge provided in an embodiment of the present application.

Fig. 3 is another exploded view of a quick-release American style damping hinge provided in an embodiment of the present application.

Fig. 4 is an exploded view of the hinge arm structure.

Fig. 5 is an exploded view of the hinge arm structure.

Fig. 6 is another exploded view of a quick-release American style damping hinge provided in an embodiment of the present application.

Fig. 7 is another exploded view of a quick-release American style damping hinge provided in an embodiment of the present application.

Fig. 8 is another exploded view of a quick-release American style damping hinge provided in an embodiment of the present application.

Fig. 9 is another exploded view of a quick-release American style damping hinge provided in an embodiment of the present application.

Fig. 10 is an exploded view of the connection structure.

Fig. 11 is a perspective view of the rotating portion in the connection structure.

Fig. 12 to 13 are perspective views of bent portions in the connection structure.

Fig. 14A to 14D are schematic views of the installation process.

Fig. 15A to 15D are schematic views of the mounting process.

Reference numerals illustrate:

1 hinge cup structure

2 connection structure

3-hinge arm structure

4-hinge arm base

11 hinge cup body

12 first torsion spring

13 second torsion spring

14 first torsion spring protective sleeve

15 second torsion spring protective sleeve

16 damping device

17 hinge end

21 rotation part

22 bending part

23 third eccentric nail

31 first fixing plate

32 second fixing plate

33 first eccentric nail

34 second eccentric nail

35 chute

41 baseboard

42 pressing part

111 groove

112 square hole

113 special-shaped hole

121 first claw

122 first extension

131 second jaw

132 second extension portion

161 press hoop

162. Damper

163. Switch

171. First shaft pin

172. First pin hole

211. Hinge region

212. First hinge arm fixing area

221. Second hinge arm fixing area

222. Hinge arm mounting area

311 buckle

312 seventh through hole

313 first round hole

314 first through hole

315 second through hole

316 third through hole

317 second accommodating groove

321 fourth through hole

322 fifth through hole

323 second round hole

324 third round hole

325 jack

411U-shaped concave bayonet

412 hook

413 shaped cavity

414 fourth pin hole

415 clamping groove

416 sixth through hole

417 convex peak

421 fastener

422 fourth shaft pin

423 third torsion spring

2111. Winding drum

2112. Arc lug

2121. Sliding rail

2122. Tenth through hole

2211. Guide groove

2212. Eleventh through hole

2213. Press buckle

2221 first storage groove

2222 first waist-shaped hole

2223 second waist-shaped hole

2224 first aisle aperture

2225 eighth via

2226 third aisle hole

2227 second shaft pin

2228 third pin

4121 stop block

4211 semi-circular groove

4212 fourth round hole

4213 groove

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The following provides a term explanation of the present application.

American damped hinge (Cup hinges), which may also be referred to as American damped blind hinge, meets and exceeds the relevant definition, requirements and inspection standards of the light industry standards QB/T1242-1991 and QBT2189-2013 of the people's republic of China, and meets and exceeds the relevant definition, requirements and inspection standards in European Union standard 15570-2008.

For the convenience of understanding the technical solutions provided in the embodiments of the present application, the following related technologies are described below:

american damping hinge is a common furniture hardware, and generally consists of a hinge cup, a connecting plate, a hinge arm, a base and the like. The American damping hinge is arranged between the light cabinet door and the door frame, so that the door can rotate relative to the door frame. However, the existing hinges require very complicated and time-consuming installation and removal of the hinges, which is very inconvenient.

Therefore, the embodiment of the application provides a American damping hinge technical scheme. Based on this, in the American damped hinge in the embodiments of the present application, the hinge arm structure can be quickly mounted to the hinge arm base. See in particular below.

Hereinafter, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 and 2, the quick detachable american type damping hinge may include: a hinge cup structure 1, a connecting structure 2, a hinge arm structure 3 and a hinge arm base 4. Wherein, hinge cup structure 1 and connection structure 2 are articulated together, and connection structure 2 assembles together with hinge arm structure 3, and hinge arm structure 3 can install on the hinge arm base 4 fast to and follow fast hinge arm base 4 is gone up separately, thereby realizes quick assembly disassembly.

The respective configurations and mating relationships of the hinge cup structure 1, the connecting structure 2, the hinge arm structure 3, and the hinge arm base 4 are described below.

The hinge cup structure 1 can be fixedly arranged on a door or a door frame.

And the connecting structure 2 is hinged on the hinge cup structure 1. The connecting structure 2 and the hinge cup structure 1 can be provided with hinge components which are matched with each other according to the requirement. The above-described hinge may be achieved by, for example, the first shaft pin 171.

Wherein the connection structure 2 may include a rotation portion 21 and a bending portion 22. The bending part 22 includes a hinge arm mounting area 222, the hinge arm mounting area 222 has a first receiving groove 2221 with a downward opening, the hinge arm mounting area further includes a third shaft pin 2228, the third shaft pin 2228 spans between two sides of the first receiving groove 2221, and the third shaft pin 2228 is located at an end of the hinge arm mounting area 222 far from the hinge cup structure 1.

The hinge arm structure 3 is accommodated in the first accommodating groove 2221 and connected to the connection structure 2, and the hinge arm structure 3 has a downward opening chute 35. The hinge arm structure 3 and the connecting structure 2 can be provided with mutually matched connecting modes and components according to the requirement. For example, the connection may be achieved by a second shaft pin 2227 and a third shaft pin 2228.

The hinge arm base 4 can be fixed on a door frame or a door and comprises a pressing part 42, wherein the pressing part 42 comprises a clamping piece 421.

In the assembled state, the hinge arm base 4 is locked into the chute 35, and the third shaft pin 2228 slides to the locking member 421 and is locked and fixed with the locking member 421, so that the hinge arm structure 3 and the hinge arm base 4 are fixedly connected. In the disassembled state, the third shaft pin 2228 is disengaged from the catch 421, so that the hinge arm structure 3 is separated from the hinge arm base 4. As shown in fig. 14A to 14D, the user may slide the hinge arm structure 3 onto the hinge arm base 4, so that the hinge arm base 4 is accommodated in the chute 35, and further presses the position of the third shaft pin 2228, so that the third shaft pin 2228 and the fastener 421 are engaged, thereby realizing rapid installation of the american damping hinge. As shown in fig. 15A to 15D, the user may press the pressing portion 42 to disengage the fastening member 421 and the third shaft pin 2228, so as to quickly detach the american damping hinge, and thus quickly detach the door from the corresponding door frame.

In the above embodiment, the engagement or disengagement with the third shaft pin 2228 by the catch 421 in the pressing portion 42 is described, and the attachment and detachment between the hinge arm structure 3 and the hinge arm base 4 is further performed.

In an alternative embodiment, the pressing part 42 further includes: a fourth pin 422 and a third torsion spring 423.

As shown in fig. 3 and 5, the third torsion spring 423 may be a double torsion spring or two or more single torsion springs. And a fourth shaft pin 422, wherein the fourth shaft pin 422 is strung through the third torsion spring 423 and is used for hinging the pressing part 42 to one end of the hinge arm base 4. Under the action of an external force, the fastening member 421 rotates about the fourth shaft pin 422 as an axis to open, so that the third shaft pin 2228 aligns with the fastening member 421, and under the condition that the external force is lost, the fastening member 421 rotates back about the fourth shaft pin 422 as an axis under the action of the torsion of the third torsion spring 423, so that the fastening member 421 and the third shaft pin 2228 are fastened and fixed. In this alternative embodiment, the structure is simple, making the split and installation more convenient.

In an alternative embodiment, the hinge arm base 4 further comprises a base plate 41; the bottom plate 41 includes: hooks 412 and shaped cavities 413.

As shown in fig. 3 and 5, the hooks 412 extend from the end of the bottom plate 41 away from the hinge cup structure 1 and are respectively located at two sides of the bottom plate 41; wherein, the upper edge of the hook 412 forms a special-shaped concave cavity 413 with an upward opening; correspondingly, semicircular grooves 4211 are formed in the upper edges of the two sides of the buckle piece 421; wherein, in the assembled state, the shaped recess 413 and the semicircular groove 4211 form a fixing hole for fixing the third shaft pin 2228.

As shown in fig. 14A to 14D, the user may slide the hinge arm structure 3 onto the hinge arm base 4, so that the hinge arm base 4 is received in the slide groove 35, and then presses the third shaft pin 2228. Since the third pin 2228 abuts against the locking member 421, the pressing force applied to the locking member 421 causes the pressing portion 42 to rotate around the fourth pin 422 clockwise to open, so that the third pin 2228 falls into the bottom of the shaped cavity 413. At this time, the pressing of the third shaft pin 2228 is stopped, the pressing force applied to the fastening member 421 is eliminated, and the pressing portion 42 rotates counterclockwise around the fourth shaft pin 422 under the torsion force of the third torsion spring 423 to return to the initial position or to the position close to the initial position, so that the semicircular groove 4211 is just snapped into the third shaft pin 2228. The semicircular grooves 4211 and the special-shaped concave cavities 413 form fixing holes. The opening size of the fixing hole is smaller than the diameter of the third shaft pin 2228, so that the fixing hole can fix the third shaft pin 2228 in a clamping manner, and the American damping hinge can be quickly installed. As shown in fig. 15A to 15D, the user may press the pressing portion 42, the pressing portion 42 is rotated and opened clockwise about the fourth shaft pin 422 by the pressure applied to the fastening member 421, so that the semicircular groove 4211 is separated from the third shaft pin 2228, the fixing hole structure is broken, and the third shaft pin 2228 is further separated from the shaped cavity 413, thereby realizing quick detachment of the american damping hinge.

Of course, the installer may press the pressing portion 42, so that the pressing portion 42 rotates clockwise about the fourth shaft pin 422, and the third shaft pin 2228 falls into the bottom of the shaped cavity 413. After the installer releases the pressing portion 42, the pressing portion 42 rotates counterclockwise around the fourth shaft pin 422 under the torsion force of the third torsion spring 423 to return to the initial position or to the near initial position, the semicircular groove 4211 is just snapped into the third shaft pin 2228, the semicircular groove 4211 and the shaped cavity 413 form a fixing hole, and the fixing hole is snapped and fixed with the third shaft pin 2228. And vice versa.

As shown in fig. 5, in some embodiments, the pressing portion 42 is further provided with a groove 4213 for an installer to press. As described above, the pressing portion 42 includes the catch 421, the fourth shaft pin 422, and the third torsion spring 423. The fastening member 421 is further provided with a fourth round hole 4212. The fourth round holes 4212 are respectively located at two sides of the fastening member 421. The fourth circular hole 4212 is coaxial with the main body portion of the third torsion spring 423. The fourth shaft pin 422 is threaded through the fourth pin hole 414, the fourth round hole 4212, and the third torsion spring 423, so as to hinge the pressing portion 42.

It should be noted that, the third torsion spring 423 may be a double torsion spring, the extension legs at two ends of the double torsion spring are abutted against the bottom of the fastening member 421, and the extension portion in the middle of the double torsion spring is abutted against the bottom of the bottom plate slot 415. Of course, the third torsion spring 423 may be a single torsion spring, or the like, or other torsion generating member.

In an alternative embodiment, as shown in fig. 2 and 5, the hook 412 is further provided with stoppers 4121, and the stoppers 4121 are located on both inner walls of the hook 412, for resisting the pressing portion 42 from being turned in a predetermined direction, so as to limit the initial position of the pressing portion 42 to a predetermined position.

In an alternative embodiment, the hinge arm structure 3 further includes a first fixing plate 31 and a second fixing plate 32, and the first fixing plate 31 and the second fixing plate 32 are connected.

In some embodiments, the hinge arm mounting area 222 and the hinge arm structure 3 may be correspondingly configured. As shown in fig. 3-6, the first fixing plate 31 has a second accommodation groove 317 with a downward opening, and the first fixing plate is further provided with a buckle 311, where the buckle 311 is located on the bottom surface of the first fixing plate 31.

As shown in fig. 2, the second fixing plate 32 is received in the second receiving groove 317, and the buckle 311 is used to limit the second fixing plate 32 from being separated from the second receiving groove 317, so that the second fixing plate 32 and the first fixing plate 31 are connected.

It should be noted that, the first fixing plate 31 and the second fixing plate 32 may be provided with other connection manners and components that are mutually matched according to needs, which are not described herein.

In the installation process, since the connection structure 2 and the hinge arm structure 3 are a combination, the connection structure 2 is slid onto the hinge arm base 4, that is, the hinge arm structure 3 is slid onto the hinge arm base 4, and how to effectively connect the connection structure 2 and the hinge arm structure 3, so that the connection structure and the hinge arm structure are integrated, see the following optional embodiments.

As shown in fig. 2-7, the hinge arm mounting region 222 further includes: a second axle pin 2227, said second axle pin 2227 being located on a side of said hinge cup structure 1 in said hinge arm mounting area 222. The hinge arm mounting area 222 is further provided with: a first kidney-shaped aperture 2222 and a second kidney-shaped aperture 2223. The first fixing plate 31 is provided with: a seventh through hole 312 and a first circular hole 313. The second fixing plate 32 is provided with: a second circular hole 323 and a third circular hole 324. The first waist-shaped hole 2222, the seventh through hole 312 and the second round hole 323 are located correspondingly, and the second waist-shaped hole 2223, the first round hole 313 and the third round hole 324 are located correspondingly; the second shaft pin 2227 sequentially passes through the first waist-shaped hole 2222, the seventh through hole 312 and the second round hole 323 and is bridged between two sides of the first accommodating groove 2221, the third shaft pin 2228 sequentially passes through the second waist-shaped hole 2223, the first round hole 313 and the third round hole 324 and is bridged between two sides of the first accommodating groove 2221, so that the hinge arm mounting area 222, the first fixing plate 31 and the second fixing plate 32 are connected, and the connecting structure 2 and the hinge arm structure 3 are connected.

In some embodiments, in the case where the hinge arm mounting region 222, the first fixing plate 31, and the second fixing plate 32 are connected, fine adjustment may be performed in a predetermined direction between the hinge arm mounting region 222 and the first fixing plate 31. For example, the hinge arm mounting area 222 and the first fixing plate 31 are relatively displaced by an external force. In the present embodiment, as shown in fig. 2-7, a first waist-shaped hole 2222 and a second waist-shaped hole 2223 are provided, a second shaft pin 2227 traverses two first waist-shaped holes 2222, and a third shaft pin 2228 traverses 2 second waist-shaped holes. Wherein the first waist-shaped hole 2222 is used for limiting the movable space of the second shaft pin 2227, and the second waist-shaped hole 2223 is used for limiting the movable space of the third shaft pin 2228. Therefore, the maximum adjustable range of displacement between the hinge arm mounting region 222 and the first fixing plate 31 can be limited based on the first and second waist-shaped holes 2222 and 2223, the second and third shaft pins 2227 and 2228, and the service life can be improved.

During installation, the arm base 4 is snapped into the chute 35, and the arm base 4 and the arm structure 3 may be detachably coupled together by a third pivot pin 2228. Furthermore, how the hinge arm structure 3 and the connecting structure 2 can be detachably connected together, so that the overall hinge structure is more rational, closely related and firm, see in particular the alternative embodiments.

In alternative embodiments, the hinge arm base 4 and the connecting structure 2 may be provided with corresponding structural arrangements. As shown in fig. 3 and 6, the bottom plate 41 is further provided with: u-shaped concave bayonets 411 are respectively positioned on the side plates on two sides of the bottom plate 41 and positioned at one end of the side plate, which is close to the hinge cup structure 1; the opening of the U-shaped concave bayonet 411 faces the hinge cup structure 1;

wherein, in the assembled state, the bottom plate 41 is clamped into the sliding groove 35, and the second shaft pin 2227 is clamped with the U-shaped concave bayonet 411, so that the connecting structure 2 and the hinge arm base 4 are detachably connected together.

In the user's installation, the user will hinge arm structure 3 sliding closure to on the hinge arm base 4, bottom plate 41 is acceptd in spout 35, and U type concave bayonet socket 411 and second axle round pin 2227 block can link together hinge arm base 4 and connection structure 2 detachably effectively to make whole hinge structure more reasonable, the contact is inseparable, firm.

In some embodiments, other locking structures may be provided for the hinge arm base 4 and the connection structure 2, for example, a limit groove is provided on inner walls of two sides of the connection structure 2, and limit blocks are provided on two outer sides of the hinge arm base 4. Of course, other engaging structures are also possible, and will not be described in detail herein.

In some embodiments, as shown in fig. 3-7, the bottom plate 41 is further provided with a convex peak 417, respectively located on two sides of the bottom plate 41. Correspondingly, the second fixing plate 32 is provided with insertion holes 325 respectively located at two sides of the second fixing plate 32. During the user installation, the user slides the hinge arm structure 3 onto the hinge arm base 4, the bottom plate 41 is accommodated in the chute 35, and the boss 417 is inserted into the insertion hole 325, so as to limit the relative positional relationship between the bottom plate 41 and the second fixing plate 32.

During installation, the installation position of the hinge arm structure 3 may deviate from the actual position during the installation of the door to the door frame. At this time, it is often necessary to remove the hinge arm structure 3 from the door or the doorframe, resulting in a decrease in installation efficiency.

In an alternative embodiment, the hinge arm mounting area 222 is further provided with: a first through hole 2224, an eighth through hole 2225, and a third through hole 2226. Correspondingly, the first fixing plate 31 is provided with: a first through hole 314, a second through hole 315, and a third through hole 316. The second fixing plate 32 is provided with: fourth through hole 321, fifth through hole 322. The bottom plate is provided with: sixth through hole 416.

The first through hole 2224, the first through hole 314, the fourth through hole 321, and the sixth through hole 416 are located correspondingly, so that the self-tapping screw can pass through. The eighth through hole 2225 and the second through hole 315 are positioned to correspond, the eighth through hole 2225 is a waist-shaped hole, the eighth through hole 2225 is used for slidably clamping in a nut of the first eccentric nail 33, the second through hole 315 is used for clamping in a screw rod of the first eccentric nail 33, and the first eccentric nail 33 is used for adjusting the relative position relationship between the hinge arm mounting area 222 and the first fixing plate 31 along a preset direction. The third through hole 316 corresponds to the third through hole 2226, the third through hole 316, and the fifth through hole 322, the third through hole 316 is a waist-shaped hole, the third through hole 316 is configured to slidably engage with a nut of the second eccentric pin 34, the fifth through hole 322 is configured to engage with a screw of the second eccentric pin 34, and the second eccentric pin 34 is configured to adjust a relative positional relationship between the first fixing plate 31 and the second fixing plate 32 along a predetermined direction.

By rotating the first eccentric pin 33, a relative movement in a first direction can be created between the hinge arm mounting area 222 and the first stationary plate 31. By rotating the second eccentric pin 34, a relative movement in a second direction can be produced between the first fixing plate 31 and the second fixing plate 32. The first direction and the second direction are perpendicular. It will be appreciated that the hinge arm structure 3 can be readily trimmed by manipulation of the first and second eccentric nails 33, 34.

In an exemplary application, as shown in fig. 12 to 13, the eighth through hole 2225 of the hinge arm mounting area is provided with the first eccentric pin 33, and the shaft of the first eccentric pin 33 is connected by reverse spin riveting through the second through hole 315 of the first fixing plate 31. The second eccentric pin 34 is disposed in a third through hole 316 (a waist-shaped hole) in the first fixing plate 31, and a shaft of the second eccentric pin 34 passes through a reverse side of the fifth through hole 322 of the second fixing plate 32 to be screwed.

It should be noted that the above structure may be replaced as needed.

In an alternative embodiment, the connection structure 2 includes a rotation part 21 and a bending part 22, wherein the rotation part 21 and the bending part 22 are separable, and a relative movement in a preset direction is generated between the rotation part 21 and the bending part 22, so that a positional relationship between the hinge cup structure 1 and the hinge arm structure 3 can be finely adjusted to allow a certain error in an assembling position of the hinge cup structure 1 and the hinge arm structure 3.

The rotating portion 21 includes a hinge region 211 and a first hinge fixing region 212.

Wherein, the first hinge fixing area 212 is provided with: a slide rail 2121; correspondingly, the bending part 22 further comprises a second hinge fixing area 221, and the second hinge fixing area 221 is provided with a guide groove 2211 and a press buckle 2213. The guide groove 2211 is slidably engaged with the slide rail 2121. A press button 2213 is located on a surface of the second hinge arm fixing area 221 near the hinge cup structure 1, and the press button 2213 is used for limiting the slide rail 2121 from being separated from the guide groove 2211. The second hinge fixing area 221 may be vertically fixed at one end of the hinge mounting area 222.

As shown in fig. 11, the first arm fixing area 212 is provided with two opposite sliding rails 2121, and the two sliding rails 2121 are correspondingly located at two sides thereof. As shown in fig. 10, the second hinge fixing area 221 is provided with two opposite guide grooves 2211 and two opposite press buckles 2213, the two guide grooves 2211 are correspondingly positioned at two sides of the second hinge fixing area 221, and the press buckles 2213 are positioned at the outer sides of the two guide grooves 2211. The slide 2121 may slide into the guide 2211 and be restrained from disengagement by the press-button 2213. Under the action of external force, the sliding rail 2121 can slightly slide and adjust in the guiding groove 2211. By means of the sliding clamping mode, the rotary part 21 and the bending part 22 are convenient to attach and fix, and strength is improved.

The first arm fixing section 212 is further provided with a tenth through hole 2122; the second hinge arm fixing area 221 is further provided with an eleventh through hole 2212; wherein the tenth through hole 2122 corresponds in position to the eleventh through hole 2212 to pass through the third eccentric stud 23; wherein the tenth through hole 2122 is a waist-shaped hole, the tenth through hole 2122 is configured to slidably engage with a nut of the third eccentric pin 23, and the eleventh through hole 2212 is configured to engage with a screw of the third eccentric pin 23; the third eccentric pin 23 is used to adjust the relative positional relationship between the first hinge fixing area 212 and the second hinge fixing area 221 in a predetermined direction. Since the slide rail 2121 can slightly slide in the guide groove 2211. Accordingly, the installer can adjust the relative positional relationship between the first hinge arm fixing area 212 and the second hinge arm fixing area 221 by rotating the third eccentric pin 23.

Of course, in some embodiments, the rotating portion 21 and the bending portion 22 may be fixed in other manners, or even integrally formed.

Wherein the hinge area 211 is adapted to hinge with the hinge cup structure 1. In some embodiments, the hinge region 211 may wrap around the roller 2111 and the arc tab 2112, wherein the arc tab 2112 is an extension on both sides of the hinge region. As shown in fig. 8 to 9, the hinge cup structure 1 is provided with a hinge portion 17, and both sides of the hinge portion 17 are provided with first pin holes 172. The first shaft pin 171 passes through the first pin hole 172 and the drum 2111 to hinge the hinge area 211 and the hinge cup structure 1. Of course, in some embodiments, other configurations may be used to effect articulation.

The following describes the structure of the hinge cup structure 1.

In an alternative embodiment, the hinge cup structure 1 provides a pressing force for closing the door.

The hinge cup structure includes: hinge cup body 11 and torsion spring.

The hinge cup body 11 is provided with a groove 111, and the side wall of the groove 111 is respectively provided with a square hole 112 and a special-shaped hole 113 in sequence. The torsion spring comprises a torsion spring main body, and a claw and an extension part which are obtained by extending the torsion spring main body; the claw is fixed in the square hole 112, and the extension part passes through the special-shaped hole 113 and can be propped against one end of the connecting structure 2. When the included angle between the hinge cup structure 1 and the connecting structure 2 is in a first range, the extending part abuts against one end of the connecting structure 2, and generates acting force on the connecting structure 2. The torsion springs may be plural, for example, a first torsion spring 12 and a second torsion spring 13, and the first torsion spring 12 and the second torsion spring 13 are respectively located at two sides of the hinge cup body 11. Wherein the first torsion spring 12 is provided with a first pawl 121 and a first extension 122. The second torsion spring 13 is provided with a second pawl 131 and a second extension 132.

Based on the above structure, when the door is pushed to be closed to an angle of about 40-35 degrees, the first torsion spring 12 and the second torsion spring 13 press the connecting structure 2 by abutting the arc lug 2112, and the generated pressing force drives the door to rotate around the reel 2111 as the axis to close the door.

In an alternative embodiment, the hinge cup structure 1 provides a damping force that buffers rotational door closing penetrability forces.

The hinge cup structure includes: a hinge cup body 11 and a damping device 16. The hinge cup body 11 is provided with a recess 111. A damping device 16, said damping device 16 comprising a damper 162; the damper 162 is located in the groove 111, one end of the damper is towards the inner wall of the groove 111, and the other end of the damper is towards one end of the connecting structure 2; wherein, when the included angle between the hinge cup structure 1 and the connecting structure 2 is in the second range, the end portions of the damper 162 respectively abut against the inner wall of the groove 111 and the end portions of the connecting structure and generate damping force. When the hinge region 211 of the connection structure 2 contacts one end of the damping device 16 during the door closing process, the damping force of the damping device 16 can buffer the rotational door closing penetrability force, so that the door is slowly and gently closed, and the noise generated by the door striking the door frame is eliminated.

In some embodiments, the damper 162 may include a cylinder and a damper rod, one end of the damper rod being abutted against the inner wall of the groove 111, and the other end of the damper rod being located within the cylinder. The outer wall of the bottom of the oil cylinder is an inclined plane. When the hinge area 211 of the connection structure 2 contacts the inclined surface of the oil cylinder, thrust is generated on the oil cylinder, so that the oil cylinder is triggered to generate a directional damping force, and the rotation speed of the connection structure 2 of the door is slowed down. It should be noted that, the inclined plane is provided with and helps the atress even, increases the life of attenuator, and then increases the life of device.

It should be noted that, in the hinge cup structure 1, a torsion spring or a damping device may be provided, or may be provided at the same time. When the door is simultaneously arranged, the door can be driven to rotate around the winding drum 2111 as the axis to close the door, and noise generated when the door impacts the door frame can be eliminated.

In an alternative embodiment, a switching function may also be provided, i.e. to fix the door in a specific state. The damping device 16 further comprises: a clamp 161 and a switch 163; wherein the press hoop 161 is fixed above the groove 111 and forms an accommodating space with the groove 111, the accommodating space being used for limiting the movable range of the damper 162; a clamping groove 1611 is formed on one side of the pressing hoop 161; the switch 163 is slidably disposed in the engagement slot 1611 and has a downward projection. Correspondingly, a protrusion 1621 is arranged on the outer wall of the damper 162; wherein the boss contacts the protrusion 1621 when the switch 163 is slid to the first position range, and the boss is separated from the protrusion 1621 when the switch is slid to the second position range.

When the switch 163 is slid to the first position range, the boss of the switch 163 prevents the damper 162 (cylinder) from being compressed by the interference protrusion 1621, and thus prevents the rotation of the connection structure 2, and thus the rotation of the door. When the switch 163 slides to the second position range, the boss below the switch 163 is separated from the boss 1621, and at this time, the damper 162 (cylinder) generates a damping force to slow down the rotation of the link structure 2, but does not prevent further rotation of the link structure 2, under the thrust of the hinge region 211 of the link structure 2.

In some embodiments, the bottom of the post is beveled. When the cylinder of the oil damper 162 approaches the damper 162, the protrusion 1621 breaks through the inclined surface to the back surface of the inclined surface and abuts against the back surface. At this time, the damper 162 does not generate a damping force when the angle within a certain range is opened and closed.

In an alternative embodiment, the hinge cup structure 1 further includes a torsion spring protection sleeve, and the torsion spring protection sleeve is sleeved on the torsion spring. The torsion spring protective sleeve may be provided in plurality, such as a first torsion spring protective sleeve 14 and a second torsion spring protective sleeve 15. The first torsion spring protection sleeve 14 is sleeved on the first torsion spring 12, and the second torsion spring protection sleeve 15 is sleeved on the second torsion spring 13. The torsion spring protective sleeve comprises two separated parts, wherein the first part is sleeved on the clamping jaw, and the second part is sleeved on the torsion spring main body and the extension part. The second part comprises a sleeve which is matched with one end of the torsion spring main body, and a shaft post is arranged in the middle of the sleeve and is inserted into a coil of the torsion spring main body.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

For ease of description, directional terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal" and "top, bottom" etc. refer to a direction or positional relationship generally based on that shown in the drawings, and merely for convenience of description and simplicity of description, these directional terms do not indicate or imply that the apparatus or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both first and second features being in direct contact, and may also include both first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

It should also be noted that references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the invention as set forth in connection with other embodiments.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

It should be further noted that the foregoing is only a preferred embodiment of the present application, and is not intended to limit the scope of the patent protection of the present application, and all equivalent structures or equivalent process changes made by the content of the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the patent protection of the present application.

Claims (10)

1. But quick assembly disassembly's American damping hinge, characterized in that includes:

a hinge cup structure (1);

the connecting structure (2) is hinged with the hinge cup structure (1); the connecting structure (2) comprises a bending part (22), the bending part (22) comprises a hinge arm installation area (222), the hinge arm installation area (222) comprises a third shaft pin (2228) and a first containing groove (2221) with a downward opening, the third shaft pin (2228) is bridged between two sides of the first containing groove (2221), and the third shaft pin (2228) is positioned at the end part, away from the hinge cup structure (1), in the hinge arm installation area (222);

an arm hinge structure (3) which is accommodated in the first accommodating groove (2221) and is connected with the connecting structure (2); the hinge arm structure (3) is provided with a chute (35) with a downward opening;

The hinge arm base (4) comprises a pressing part (42), wherein the pressing part (42) comprises a clamping piece (421);

wherein, under assembled state, hinge arm base (4) is blocked into in spout (35), third pivot (2228) slip extremely buckle spare (421), and with buckle spare (421) block is fixed, so that hinge arm structure (3) with hinge arm base (4) fixed connection, under the split state, third pivot (2228) with buckle spare (421) break away from, so that hinge arm structure (3) with hinge arm base (4) separation.

2. The quick detachable american damping hinge of claim 1, wherein the pressing portion (42) further includes:

a third torsion spring (423);

a fourth shaft pin (422), wherein the fourth shaft pin (422) is connected in series with the third torsion spring (423) and is used for hinging the pressing part (42) at one end of the hinge arm base (4);

under the action of external force, the buckling piece (421) rotates and opens by taking the fourth shaft pin (422) as the shaft center, so that the third shaft pin (2228) is aligned with the buckling piece (421); and under the condition that the external force disappears, the buckling piece (421) rotates back by taking the fourth shaft pin (422) as the shaft center under the torsion action of the third torsion spring (423), so that the buckling piece (421) is buckled and fixed with the third shaft pin (2228).

3. The quick detachable american damping hinge of claim 2, wherein the hinge arm base (4) further comprises a bottom plate (41); the base plate (41) includes: hooks (412), wherein the hooks (412) extend from the end part of the bottom plate (41) away from the hinge cup structure (1) and are respectively positioned at two sides of the bottom plate (41); wherein, the upper edge of the hook (412) forms a special-shaped concave cavity (413) with an upward opening;

correspondingly, semicircular grooves (4211) are formed in the upper edges of the two sides of the buckle piece (421);

wherein the shaped cavity (413) and the semicircular groove (4211) form a fixing hole for fixing the third shaft pin (2228).

4. A quick detachable american damping hinge according to claim 3, characterized in that the hook (412) is further provided with:

and stoppers (4121) provided on inner walls of both sides of the hook (412) for abutting the pressing portion (42).

5. A quick detachable american damping hinge according to claim 3, characterized in that the hinge arm structure (3) comprises:

a first fixing plate (31), the first fixing plate (31) being located in the first receiving groove (2221); the first fixing plate (31) is provided with a second containing groove (317) with a downward opening, the first fixing plate (31) is also provided with a buckle (311), and the buckle (311) is positioned on the bottom surface of the first fixing plate (31);

A second fixing plate (32), wherein the second fixing plate (32) is accommodated in the second accommodating groove (317); the buckle (311) is used for limiting the second fixing plate (32) to be separated from the second accommodating groove (317), so that the second fixing plate (32) is connected with the first fixing plate (31).

6. The quick detachable american damping hinge of claim 5, wherein the hinge arm mounting zone (222) further comprises: -a second axle pin (2227), said second axle pin (2227) being located at an end of said hinge cup structure (1) in said hinge arm mounting area (222);

the two sides of the hinge arm installation area (222) are also provided with: a first kidney-shaped hole (2222) and a second kidney-shaped hole (2223);

both sides of the first fixing plate (31) are provided with: a seventh through hole (312) and a first circular hole (313);

both sides of the second fixing plate (32) are provided with: a second circular hole (323) and a third circular hole (324);

the positions of the first waist-shaped hole (2222), the seventh through hole (312) and the second round hole (323) correspond to each other, and the positions of the second waist-shaped hole (2223), the first round hole (313) and the third round hole (324) correspond to each other; the second shaft pin (2227) sequentially penetrates through the first waist-shaped hole (2222), the seventh through hole (312) and the second round hole (323) to be bridged between two sides of the first accommodating groove (2221), the third shaft pin (2228) sequentially penetrates through the second waist-shaped hole (2223), the first round hole (313) and the third round hole (324) are bridged between two sides of the first accommodating groove (2221), so that the hinge arm installation area (222), the first fixing plate (31) and the second fixing plate (32) are connected, and the connecting structure (2) and the hinge arm structure (3) are connected.

7. The quick detachable american damping hinge according to claim 6, characterized in that the bottom plate (41) is further provided with:

the U-shaped concave bayonets (411) are respectively positioned on the side plates at two sides of the bottom plate (41) and are positioned at one end of the side plate, which is close to the hinge cup structure (1); the opening of the U-shaped concave bayonet (411) faces the hinge cup structure (1);

wherein, in the assembled state, the bottom plate (41) is clamped into the sliding groove (35), and the second shaft pin (2227) is clamped with the U-shaped concave bayonet (411), so that the connecting structure (2) and the hinge arm base (4) are detachably connected together.

8. The quick detachable american damping hinge of claim 7, wherein the hinge arm mounting area (222) is further provided with: a first aisle hole (2224), an eighth through hole (2225), a third aisle hole (2226);

correspondingly, the first fixing plate (31) is provided with: a first via (314), a second via (315), a third via (316);

the second fixing plate (32) is provided with: a fourth through hole (321), a fifth through hole (322);

the bottom plate is provided with: a sixth through hole (416);

the first passage hole (2224), the first through hole (314), the fourth through hole (321) and the sixth through hole (416) are correspondingly positioned so as to allow the self-tapping screw to pass through;

The eighth through hole (2225) and the second through hole (315) are in position correspondence, the eighth through hole (2225) is a waist-shaped hole, the eighth through hole (2225) is used for being slidably clamped into a nut of a first eccentric nail (33), the second through hole (315) is used for being clamped into a screw rod of the first eccentric nail (33), and the first eccentric nail (33) is used for adjusting the relative position relationship between the hinge arm installation area (222) and the first fixing plate (31) along a preset direction;

the third passageway hole (2226), third through hole (316) and fifth through hole (322) correspond in position, third through hole (316) are waist type hole, third through hole (316) are used for slidably clamping in the nut of second eccentric nail (34), fifth through hole (322) are used for clamping in the screw rod of second eccentric nail (34), second eccentric nail (34) are used for following predetermined direction adjustment first fixed plate (31) with relative positional relationship between second fixed plate (32).

9. The quick detachable american damping hinge of claim 1, wherein the hinge cup structure comprises:

a hinge cup body (11) provided with a groove (111);

-a damping device (16), the damping device (16) comprising a damper (162); the damper (162) is positioned in the groove (111), one end of the damper faces the inner wall of the groove (111), and the other end of the damper faces one end of the connecting structure (2);

When the included angle between the hinge cup structure (1) and the connecting structure (2) is in a second range, the end parts of the damper (162) respectively prop against the inner wall of the groove (111) and the end parts of the connecting structure, and generate damping force.

10. The quick release, american style damping hinge of claim 9 wherein,

the damping device (16) further comprises: a clamp (161) and a switch (163); wherein the press hoop (161) is fixed above the groove (111) and forms an accommodating space with the groove (111), and the accommodating space is used for limiting the movable range of the damper (162); a clamping groove (1611) is formed in one side of the pressing hoop (161); the switch (163) is slidably positioned on the clamping groove (1611) and is provided with a downward convex column;

correspondingly, a protrusion part (1621) is arranged on the outer wall of the damper (162);

wherein the boss contacts the protrusion (1621) when the switch (163) is slid to the first range of positions, and the boss is separated from the protrusion (1621) when the switch is slid to the second range of positions.

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