CN213115913U

CN213115913U - Simple and convenient disassembly and assembly mechanism for furniture hinge and base

Info

Publication number: CN213115913U
Application number: CN202020372004.3U
Authority: CN
Inventors: 伍志勇
Original assignee: Guangdong DTC Hardware Precision Manufacturing Co Ltd
Current assignee: Guangdong DTC Hardware Precision Manufacturing Co Ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2021-05-04
Anticipated expiration: 2030-03-20

Abstract

A simple and convenient disassembly and assembly mechanism for a furniture hinge and a base comprises a hinge assembly and a fixed base, wherein the hinge assembly at least comprises a connecting arm and a middle piece, an eccentric piece is arranged between the connecting arm and the middle piece, connecting arm flanges are bent on the left side and the right side of the connecting arm, and limiting flanges and buckling flanges are bent on the left side and the right side of the middle piece; the intermediate piece is positioned and slidably arranged on the connecting arm flanging of the connecting arm through the matching of the eccentric piece and the limiting flanging so as to realize adjustable positioning connection between the connecting arm and the intermediate piece; the fixed base is provided with an assembly groove and a buckling piece, the connecting arm or the intermediate piece is provided with a side wing and is slidably arranged on the assembly groove in a side wing translation mode so as to realize left-right and/or up-down positioning between the hinge assembly and the fixed base, and the buckling piece is movably arranged on the fixed base and is buckled with the buckling flanging after the hinge assembly is slidably arranged so as to realize matching connection between the hinge assembly and the fixed base. The utility model discloses an above-mentioned structure's improvement, the practicality is strong.

Description

Simple and convenient disassembly and assembly mechanism for furniture hinge and base

Technical Field

The utility model relates to a simple and convenient dismouting mechanism that is used for furniture hinge and base.

Background

Chinese patent document No. CN2780937Y discloses a furniture door hidden hinge capable of three-dimensionally adjusting in 2006, 5/17, which comprises a movable base fixed on a door body, an adjustable base fixed on a door frame, and a rotating arm connected therebetween, wherein the adjustable base comprises a bottom plate fixed on the door frame, a middle plate sliding up and down on the bottom plate, and an upper adjusting plate sliding back and forth on the middle plate, i.e., the base on the door frame is of a three-layer plate structure, wherein the plate is formed by casting an alloy and then is riveted with the lower adjusting plate by secondary extrusion. Although the hinge production process of the structure is simple, the adjustable base of the hinge production process is fixed on the door frame through the screws, a user firstly connects the door body and the hinges well during assembly, then fixes the door body and the hinges on the cabinet body through the screws together, and can only detach the whole door body and the hinges by loosening the screws when detaching, so that the door body is extremely inconvenient to detach, the user is difficult to detach, and the use requirements of the user cannot be met. Therefore, further improvements are necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rational in infrastructure, each component is connected compactly, low in manufacturing cost, easy production, easy realization, application range are wide, the dismouting process is quick, simple, convenient and assemble firm a simple and convenient dismouting mechanism that is used for furniture hinge and base to overcome the weak point among the prior art.

According to this purpose design's a simple and convenient dismouting mechanism that is used for furniture hinge and base, including hinge subassembly and unable adjustment base, its characterized in that: the hinge assembly at least comprises a connecting arm and a middle piece, an eccentric piece is arranged between the connecting arm and the middle piece, connecting arm flanges are bent on the left side and the right side of the connecting arm, and limiting flanges and buckling flanges are bent on the left side and the right side of the middle piece.

The intermediate part is positioned and slidably arranged on the connecting arm flanging of the connecting arm through the matching of the eccentric part and the limiting flanging so as to realize the adjustable positioning connection between the connecting arm and the intermediate part.

The fixed base is provided with an assembly groove and a buckling piece, the connecting arm or the middle piece is provided with a side wing and is arranged on the assembly groove in a sliding mode through the side wing in a sliding mode so as to achieve left-right and/or up-down positioning between the hinge assembly and the fixed base, and the buckling piece is movably arranged on the fixed base and is buckled with the buckling flanging after the hinge assembly is arranged in a sliding mode so as to achieve matching connection between the hinge assembly and the fixed base.

An arm connecting U-shaped groove is formed between the connecting arm and the arm connecting flanges on the left side and the right side; the limiting flanging is bent at the left side and the right side of the middle piece, and the left and right outer side sizes of the limiting flanging are larger than the left and right inner side sizes of the connecting arm flanging; the middle piece is in interference fit with the connecting arm flanging of the connecting arm through the limiting flanging and is arranged in the connecting arm U-shaped groove in a front-back positioning sliding mode through the eccentric piece.

The connecting arm and the intermediate piece are made of metal materials; the connecting arm flanging and the limiting flanging are respectively and elastically bent at the left side and the right side of the connecting arm and the middle piece; the intermediate piece is in elastic interference fit with the connecting arm flanging of the connecting arm through the limiting flanging.

The buckling flanging is positioned in front of the limiting flanging and is bent at the left side and the right side of the middle piece, wherein the bending direction of the buckling flanging is the same as or different from that of the limiting flanging, and the left and right outside sizes of the buckling flanging are smaller than those of the limiting flanging.

The side wings are bent on the connecting arm turned edges of the connecting arms or the limiting turned edges of the intermediate pieces; the assembly grooves are formed in the left side and the right side of the fixed base, and the left inner side and the right inner side of each assembly groove are larger than the left outer side and the right outer side of each side wing.

The assembly groove is further provided with a coating part and coated outside the side wings through the coating part, so that left and right and/or up and down positioning between the connecting arm or the intermediate piece and the fixed base is realized.

The rear end of the assembling groove is provided with a groove step part, the size between the groove step part and the side wing is equivalent to that of the front end of the side wing, the rear end of the side wing is provided with a side wing step part, the size between the side wing step part and the side wing is equivalent to that of the front end of the left assembling groove and the right assembling groove, the front end of the assembling groove is larger than the size of the rear end of the assembling groove and/or the size of the front end of the side wing, and; the connecting arm or the middle piece is arranged in the assembling groove in a sliding mode through the lateral wing, the front end of the lateral wing is in up-and-down positioning fit with the groove step portion, and the rear end of the lateral wing is in up-and-down positioning fit with the front end of the assembling groove through the lateral wing step portion.

An elastic piece is arranged between the fixed base and the buckling piece, one end of the elastic piece elastically acts on the fixed base, and the other end elastically acts on the buckling piece; the fixed base is provided with a limiting part; the fastening piece elastically swings on the fixed base in the direction of the fastening flanging all the time through the elastic piece and acts on the limiting part in a limiting way when elastically swinging; the buckling piece is also provided with a buckling part and is buckled with the buckling flanging through the buckling part.

Guide parts are arranged among the assembling groove, the side wing, the groove step part and the side wing step part, and between the buckling part and the buckling flanging; the assembling groove, the side wing, the groove step part and the side wing step part, and the buckling part and the buckling flanging are mutually guided and matched through the guide parts.

The hinge assembly further comprises an elastic piece, a movable cup seat and a bracket.

The support and the connecting arm are arranged in a split mode, a front adjusting piece and a rear adjusting piece are arranged between the support and the connecting arm, the support and the connecting arm are adjusted in front and rear positions through the front adjusting piece and the rear adjusting piece, or the support and the connecting arm are integrally arranged.

One end of the elastic element elastically acts on the connecting arm and/or the bracket, the other end of the elastic element elastically acts on the movable cup seat, and the connecting arm and/or the bracket are elastically hinged with the movable cup seat to be opened and closed through the elastic element.

One end of the eccentric part is positioned and rotated on the intermediate part, and the other end of the eccentric part is in driving connection with the connecting arm and/or the bracket when positioned and rotated.

The utility model discloses an improvement of above-mentioned structure, compared with the prior art, has following advantage:

1. the left and right sides at linking arm and middleware respectively elasticity buckle have even arm turn-ups, spacing turn-ups, the middleware can realize elasticity interference fit through between the even arm turn-ups of spacing turn-ups and linking arm, thereby improve the assembly stability between linking arm and the middleware, can also fix a position cunning between the middleware simultaneously and establish in even arm U-shaped inslot of linking arm through the eccentric part, because the elasticity interference between linking arm and the middleware, consequently the two only can move about each other towards one direction when adjusting, thereby avoid linking arm and the virtual position or the regulation inefficacy problem that the middleware appears in accommodation process, with the regulation accuracy that improves the two.

2. The user can be with unable adjustment base when using, the hinge subassembly assembles in advance respectively on the furniture cabinet body and the furniture door body, utilize the translation formula between flank and the assembly groove to slide to establish the cooperation during assembly, mutual lock joint between lock joint turn-ups and the fastener, and the mutually supporting between groove step portion and the flank step portion, can realize about between hinge subassembly and the unable adjustment base, front and back, and all azimuth formula position fixing fit from top to bottom, with finally realize the furniture cabinet body, quick assembly disassembly between the furniture door body, make the dismouting between the two more swift, convenient, it is more stable after the assembly, firm.

3. The sizes of the assembly groove, the connecting arm flanging, the limiting flanging, the fastening flanging and the side wings are optimized and adjusted, so that the mutual assembly is more reasonable, the guide function of the guide part is matched, and the positioning function of the step part of the groove and the step part of the side wing is matched, so that the simplicity and stability of the mutual assembly of the fixed base, the connecting arm and the intermediate piece are further improved.

4. The hinge assembly can not be separated from the fixed base when stressed in different directions after being assembled, so that the furniture hinge is higher in structural strength and higher in bearing capacity, potential safety hazards such as falling of a furniture door body due to fracture and deformation of the hinge assembly in the using process are avoided, the assembling stability between the fixed base and the hinge assembly is further improved, the service life of the furniture hinge is longer, and meanwhile, the furniture hinge can be widely applied to the furniture door body with larger size and weight.

5. The translational sliding device between the hinge assembly and the fixed base can be guided by each guide part, so that a user can assemble the hinge assembly and the fixed base conveniently, and the use experience of the user is improved; and an eccentric part and/or a left-right and/or up-down adjusting part are arranged between the hinge assembly and the fixed base, so that a user can adjust the front-back, and/or left-right, and/or up-down positions between the hinge assembly and the fixed base through the eccentric part and/or the left-right and/or up-down adjusting part according to actual use requirements, the appearance of the assembled furniture cabinet body and the furniture door body is more tidy and attractive, and the use experience of the user is further improved.

In summary, the novel combined type.

Drawings

Fig. 1 is an exploded schematic view of a first embodiment of the present invention.

Fig. 2 is a schematic view of an assembly structure according to a first embodiment of the present invention.

Fig. 3 is a schematic view (top view) of an assembly structure of the first embodiment of the present invention.

Fig. 4 is a schematic view of the structure of fig. 3 taken along line a-B.

Fig. 5 is a schematic view of the structure of fig. 3 taken along line a-a.

Fig. 6 is a schematic view of the structure of fig. 4 taken along line C-C.

Fig. 7-10 are schematic views illustrating the process of assembling and disassembling the hinge assembly and the fixing base according to the first embodiment of the present invention.

Fig. 11 is an exploded schematic view of a second embodiment of the present invention.

Fig. 12 is an assembly structure diagram of the second embodiment of the present invention.

Fig. 13 is an assembly structure diagram (top view) of the second embodiment of the present invention.

Fig. 14 is a schematic view of the structure of fig. 13 taken along line D-E.

Fig. 15 is a schematic view of the structure of fig. 13 taken along line D-D.

Fig. 16 is a schematic view of the structure of fig. 14 taken along line F-F.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

First embodiment

Referring to fig. 1-10, the simple and convenient disassembly and assembly mechanism for the furniture hinge and the base comprises a hinge assembly and a fixed base 1, wherein the hinge assembly at least comprises a connecting arm 2 and an intermediate piece 3, an eccentric piece 4 is arranged between the connecting arm 2 and the intermediate piece 3, connecting arm flanges 5 are bent on the left side and the right side of the connecting arm 2, and limiting flanges 6 and buckling flanges 7 are bent on the left side and the right side of the intermediate piece 3.

The intermediate piece 3 is positioned and slidably arranged on the connecting arm flanging 5 of the connecting arm 2 through the matching of the eccentric piece 4 and the limiting flanging 6 so as to realize the adjustable positioning connection between the connecting arm 2 and the intermediate piece 3.

Be provided with fitting groove 8 and fastener 9 on unable adjustment base 1, be provided with flank 10 on linking arm 2 or the intermediate member 3, and establish on fitting groove 8 through flank 10 translation formula cunning to realize controlling and/or locating from top to bottom between hinge subassembly and unable adjustment base 1, fastener 9 activity sets up on unable adjustment base 1, and slide to establish the back at the hinge subassembly and buckle connection turn-ups 7 mutual lock joint, in order to realize that the cooperation between hinge subassembly and the unable adjustment base 1 is connected.

An arm connecting U-shaped groove is formed between the connecting arm 2 and the arm connecting flanges 5 on the left side and the right side; the limiting flanging 6 is bent at the left side and the right side of the middle part 3, and the left and right outer side sizes G of the limiting flanging are larger than the left and right inner side sizes H of the connecting arm flanging; the middle piece 3 is in interference fit with the connecting arm flanging 5 of the connecting arm 2 through the limiting flanging 6 and is positioned in the connecting arm U-shaped groove in a sliding mode through the eccentric piece 4 in the front and back directions.

The connecting arm 2 and the intermediate piece 3 are made of a metallic material; the connecting arm flanging 5 and the limiting flanging 6 are respectively and elastically bent at the left side and the right side of the connecting arm 2 and the middle piece 3; the intermediate piece 3 is in elastic interference fit with the connecting arm flanging 5 of the connecting arm 2 through the limiting flanging 6.

The fastening flange 7 is located in front of the limiting flange 6 and is bent at the left side and the right side of the middle piece 3, wherein the bending direction of the fastening flange 7 is the same as or different from the bending direction of the limiting flange 6, and the left and right outside dimensions I of the fastening flange are smaller than the left and right outside dimensions G of the limiting flange.

The side wing 10 is bent on the connecting arm flanging 5 of the connecting arm 2; the assembly grooves 8 are arranged on the left side and the right side of the fixed base 1, and the left and right inner side sizes J of the assembly grooves are larger than the left and right outer side sizes K of the side wings.

The assembling groove 8 is further provided with a coating part 11, and the coating part 11 is coated on the outer side of the side wing 10, so that the connecting arm 2 or the middle piece 3 and the fixed base 1 can be positioned left and right and/or up and down.

The rear end of the assembling groove 8 is provided with a groove step part 12, the size between the groove step part and the groove step part is equivalent to the size of the front end of the side wing 10, the rear end of the side wing 10 is provided with a side wing step part 13, the size between the side wing step part and the side wing step part is equivalent to the size of the front end of the left and right assembling grooves 8, wherein the size of the front end of the assembling groove 8 is larger than the size of the rear end thereof and/or the size of the front end of the side wing; the connecting arm 2 or the middle piece 3 is arranged in the assembling groove 8 in a sliding mode through the lateral wing 10, the front end of the lateral wing 10 is in up-and-down positioning fit with the groove step part 12, and the rear end of the lateral wing is in up-and-down positioning fit with the front end of the assembling groove 8 through the lateral wing step part 13.

An elastic piece 14 is arranged between the fixed base 1 and the buckling piece 9, one end of the elastic piece 14 elastically acts on the fixed base 1, and the other end elastically acts on the buckling piece 9; the fixed base 1 is provided with a limiting part 15; the fastening piece 9 elastically swings on the fixed base 1 towards the direction of the fastening flange 7 through the elastic piece 14 all the time, and is limited to act on the limiting part 15 when elastically swinging; the buckling piece 9 is further provided with a buckling part 16, and the buckling part 16 and the buckling flanging 7 are buckled with each other.

Guide parts 17 are arranged among the assembling groove 8, the side wing 10, the groove step part 12 and the side wing step part 13, and between the buckling part 16 and the buckling flanging 7; the assembling groove 8, the side wing 10, the groove step part 12 and the side wing step part 13, and the buckling part 16 and the buckling flanging 7 are mutually matched in a guiding way through the guiding part 17.

The hinge assembly further includes a spring 18, a movable cup holder 19 and a bracket 20.

The bracket 20 and the connecting arm 2 are arranged separately, a front-back adjusting piece 21 is arranged between the bracket 20 and the connecting arm 2, and the front-back position of the bracket 20 and the connecting arm 2 is adjusted through the front-back adjusting piece 21.

One end of the elastic element 18 elastically acts on the bracket 20, the other end elastically acts on the movable cup seat 19, and the connecting arm 2 and the bracket 20 are mutually and elastically hinged to open and close with the movable cup seat 19 through the elastic element 18.

The eccentric part 4 is positioned and rotated on the intermediate part 3 at one end and is drivingly connected with the connecting arm 2 and/or the bracket 20 at the other end during the positioning and rotation.

Second embodiment

Referring to fig. 11-16, the present easy-to-disassemble mechanism for furniture hinge and base differs from the first embodiment in that: the bracket 20 is provided integrally with the connecting arm 2.

One end of the elastic element 18 elastically acts on the connecting arm 2 and/or the bracket 20, the other end elastically acts on the movable cup seat 19, and the connecting arm 2 and the bracket 20 are mutually and elastically hinged to open and close with the movable cup seat 19 through the elastic element 18.

The side flaps 10 are folded over the limiting flanges 6 of the intermediate piece 3.

A left-right and/or up-down adjusting piece 25 is arranged between the connecting arm 2 and the middle piece 3, and a user can adjust the left-right and/or up-down position between the hinge assembly and the fixed base 1 through the left-right and/or up-down adjusting piece 25 according to the actual use requirement.

The other parts not described are the same as those of the first embodiment.

The drawings are for illustrative purposes only and are presented in the form of illustrations only, not illustrations as physical or logical, and should not be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Moreover, like or similar reference numerals in the drawings of the embodiments of the present invention correspond to like or similar parts; in the description of the present invention, it should be understood that, if there are any terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "longitudinal", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, the description is for convenience and simplicity, and it is not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, the terms describing the positional relationships in the drawings are used for illustrative purposes only and are not to be construed as limiting the present patent.

Claims

1. A simple and convenient dismouting mechanism that is used for furniture hinge and base, includes hinge subassembly and unable adjustment base (1), its characterized in that: the hinge assembly at least comprises a connecting arm (2) and an intermediate piece (3), an eccentric piece (4) is arranged between the connecting arm (2) and the intermediate piece (3), wherein connecting arm flanges (5) are bent at the left side and the right side of the connecting arm (2), and limiting flanges (6) and buckling flanges (7) are bent at the left side and the right side of the intermediate piece (3);

the intermediate piece (3) is positioned and slidably arranged on the connecting arm flanging (5) of the connecting arm (2) through the matching of the eccentric piece (4) and the limiting flanging (6) so as to realize adjustable positioning connection between the connecting arm (2) and the intermediate piece (3);

the hinge assembly is characterized in that an assembly groove (8) and a buckling piece (9) are arranged on the fixed base (1), a side wing (10) is arranged on the connecting arm (2) or the middle piece (3), and the connecting arm is arranged on the assembly groove (8) in a sliding mode through the side wing (10) so as to realize left and right and/or up and down positioning between the hinge assembly and the fixed base (1), the buckling piece (9) is movably arranged on the fixed base (1) and is buckled with a buckling flanging (7) after the hinge assembly is arranged in a sliding mode, and the hinge assembly is connected with the fixed base (1) in a matched mode.

2. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 1, characterized in that: a connecting arm U-shaped groove is formed between the connecting arm (2) and the connecting arm flanges (5) on the left side and the right side; the limiting flanging (6) is bent at the left side and the right side of the middle piece (3), and the left and right outer side sizes (G) of the limiting flanging are larger than the left and right inner side sizes (H) of the connecting arm flanging; the middle piece (3) is in interference fit with the connecting arm flanging (5) of the connecting arm (2) through the limiting flanging (6) and is positioned in the connecting arm U-shaped groove in a front-back sliding mode through the eccentric piece (4).

3. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 2, characterized in that: the connecting arm (2) and the intermediate piece (3) are made of metal materials; the connecting arm flanging (5) and the limiting flanging (6) are respectively and elastically bent at the left side and the right side of the connecting arm (2) and the middle piece (3); the middle piece (3) is in elastic interference fit with the connecting arm flanging (5) of the connecting arm (2) through the limiting flanging (6).

4. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 3, characterized in that: the buckling flanging (7) is located in front of the limiting flanging (6) and is bent at the left side and the right side of the middle piece (3), wherein the bending direction of the buckling flanging (7) is the same as or different from that of the limiting flanging (6), and the left and right outer side sizes (I) of the buckling flanging are smaller than the left and right outer side sizes (G) of the limiting flanging.

5. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 4, characterized in that: the side wing (10) is bent on the connecting arm flanging (5) of the connecting arm (2) or the limiting flanging (6) of the middle piece (3); the assembly grooves (8) are arranged on the left side and the right side of the fixed base (1), and the left inner side size (J) and the right inner side size (K) of each assembly groove are larger than the left outer side size (K) and the right outer side size (K) of each side wing.

6. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 5, characterized in that: the assembling groove (8) is further provided with a coating part (11) and coated outside the side wing (10) through the coating part (11) so as to realize left-right and/or up-down positioning between the connecting arm (2) or the middle piece (3) and the fixed base (1).

7. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 6, characterized in that: the rear end of the assembling groove (8) is provided with a groove step part (12), the size between the groove step part and the groove step part is equivalent to that of the front end of the side wing (10), the rear end of the side wing (10) is provided with a side wing step part (13), the size between the side wing step part and the side wing step part is equivalent to that of the front end of the left assembling groove and the right assembling groove (8), the size of the front end of the assembling groove (8) is larger than that of the rear end of the assembling groove and/or the size of the front end of the side wing (10), and the; the connecting arm (2) or the intermediate piece (3) is arranged in the assembling groove (8) in a sliding mode through the lateral wing (10), the front end of the lateral wing (10) is in vertical positioning fit with the groove step part (12), and the rear end of the lateral wing is in vertical positioning fit with the front end of the assembling groove (8) through the lateral wing step part (13).

8. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 7, characterized in that: an elastic piece (14) is arranged between the fixed base (1) and the buckling piece (9), one end of the elastic piece (14) elastically acts on the fixed base (1), and the other end elastically acts on the buckling piece (9); a limiting part (15) is arranged on the fixed base (1); the buckling piece (9) elastically swings on the fixed base (1) towards the direction of the buckling flanging (7) through the elastic piece (14) all the time, and is limited to act on the limiting part (15) when elastically swinging; the buckling piece (9) is also provided with a buckling part (16) and is buckled with the buckling flanging (7) through the buckling part (16).

9. The easy-to-disassemble and assemble mechanism for furniture hinge and base according to claim 8, characterized in that: guide parts (17) are arranged between the assembling groove (8), the side wing (10), the groove step part (12) and the side wing step part (13), and between the buckling part (16) and the buckling flanging (7); the assembling groove (8), the side wing (10), the groove step part (12) and the side wing step part (13), and the buckling part (16) and the buckling flanging (7) are mutually guided and matched through the guide part (17).

10. The easy-to-detach mechanism for furniture hinge and base according to any one of claims 1 to 9, characterized in that: the hinge assembly further comprises an elastic piece (18), a movable cup seat (19) and a bracket (20);

the bracket (20) and the connecting arm (2) are arranged in a split mode, a front adjusting piece and a rear adjusting piece (21) are arranged between the bracket (20) and the connecting arm (2), front and rear position adjustment of the bracket (20) and the connecting arm (2) is achieved through the front adjusting piece and the rear adjusting piece (21), or the bracket (20) and the connecting arm (2) are arranged integrally;

one end of the elastic element (18) elastically acts on the connecting arm (2) and/or the bracket (20), the other end of the elastic element elastically acts on the movable cup seat (19), and the connecting arm (2) and/or the bracket (20) are mutually and elastically hinged with the movable cup seat (19) through the elastic element (18) to be opened and closed;

one end of the eccentric part (4) is positioned and rotated on the intermediate part (3), and the other end of the eccentric part is in driving connection with the connecting arm (2) and/or the bracket (20) when positioned and rotated.