CN205950162U - Run -on plate anchor clamps - Google Patents

Abstract

The utility model discloses a run -on plate anchor clamps. This run -on plate anchor clamps includes mount pad, a plurality of push rod, a plurality of work piece clip, wherein four clips on the mount pad from the top down in proper order slidable set up, a plurality of push rods are worn to establish in the mount pad and are connected the cooperation with four clips respectively, four clips through push rod separately the propulsion or retreat and open or fold, a clip setting is in the mount pad lower part, and this clip is opened or is foldd through rotatory. The utility model discloses set up the different clips of five groups according to the cooperation structure of work piece and come five kinds of work pieces of centre gripping on anchor clamps, with fixture set on the carousel circumference of middle part, along with the material loading of work piece is carried out by the material loading structure of periphery to the rotation of carousel, the welding machine by the periphery carries out automatic weld to the work piece that the centre gripping is good again, locating deviation brought when having avoided original multiplex spare manual weld product defects has improved work efficiency on the one hand greatly, product quality is guaranteed more easily to the precision height on the one hand.

Description

A kind of striking board clamp

Technical field

This utility model is related to a kind of fixture, especially relates to a kind of complicated multiple parts be positioned in complete Become the striking board clamp of multi-step automatic welding.

Background technology

At present in electric field, the structure of chopper is of all kinds, also has different parts in chopper；Some parts Needs are welded to each other the integral use of group, more particularly, to some run-on tabs, and it needs multiple parts to be welded into one use, Parts are more, and very complicated is got in welding, can only be with traditional welding procedure by manually being welded part combination during processing Connect, not only waste of manpower, lose time；And inefficiency, difficult quality guarantee.

Therefore increasing automatic welding machine is manufactured and replaces traditional artificial operation, not only in work now Greatly improve in efficiency, and the defect that before can avoiding, artificial processing ease malfunctions；Situation in automatic welding development Under, design is a can be clamped multiple parts simultaneously and carries out conveying, parts are arranged in order and is easy to be welded as a whole Fixture is the part of automatic welding most critical.

Content of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of structure simple, can position multiple zero Part, is convenient for the striking board clamp of automatic welding.

This utility model employs the following technical solutions：A kind of striking board clamp, including mounting seat, multiple push rod, arc piece folder Sub, double gold clips, connecting plate clip, contact clip and copper cash clip, arc piece clip, double gold clip, connecting plate clip, contact folder Son slidably arrange successively from top to bottom in mounting seat, multiple push rods be located in mounting seat and respectively with arc piece clip, Double gold clips, connecting plate clip, contact clip connect cooperation, and arc piece clip, double gold clip, connecting plate clip, contact clip lead to Cross the propulsion of respective push rod or retrogressing is opened or closed up；Copper cash clip is arranged on mounting seat bottom, and copper cash clip passes through rotation Turn and open or close up.

Improve as a kind of, contact clip includes two groups of slide blocks and contact clamp, and two groups of slide blocks and contact clamp are pacified respectively Dress, slide block is slidably disposed in the chute of mounting seat, contact clamp be mounted opposite seat extend to side and be upwardly formed with The corresponding contact clamping part of double gold clip height and positions, copper cash clip includes copper cash clamping part, and copper cash retaining part is in double gold Between clip and contact clamping part.

Improve as a kind of, copper cash clamping part includes fixed rack and dynamic support, and fixed rack is fixedly installed in mounting seat, fixed The limited wall being provided with the mounting table placing copper cash on support and being located at mounting table side, dynamic support is rotatably arranged on fixed On frame, dynamic support is provided with the briquetting with limited wall cooperation.

Improve as a kind of, mounting table is the convex block structure being formed on fixed rack, dynamic support has receiving, and this is convex The groove of block structure

Improve as a kind of, copper cash clip also includes rotating part and press section, and dynamic support, rotating part, press section set successively Put, rotating part is rotatably arranged in the middle part of fixed rack, leave gap between press section and fixed rack and offseted by elastic component.

Improve as a kind of, arc piece clip includes two groups of slide blocks and arc piece clamp, and two groups of slide blocks and arc piece clamp are pacified respectively Dress, slide block is slidably disposed in the chute of mounting seat, and the opposite face of two groups of arc piece clamps is provided with up/down perforation clamping The arc piece clip slot of arc piece, arc piece clip slot is gradually reduced from notch to slot bottom width.

Improve as a kind of, double gold clips include two groups of slide blocks and double gold clamp, two groups of slide blocks and double gold clamp are pacified respectively Dress, slide block is slidably disposed in the chute of mounting seat, and double gold clamps are provided with double gold folders of the double gold of before and after's insertion clamping Groove, double gold clip slots are gradually reduced from notch to slot bottom width

Improve as a kind of, mounting seat is additionally provided with the double gold limited blocks supporting double gold, double gold limited blocks and double gold folders The height of groove matches.

Improve as a kind of, connecting plate clip includes two groups of slide blocks and connecting plate clamp, two groups of slide blocks and connecting plate clamp It is respectively mounted, slide block is slidably disposed in the chute of mounting seat, the opposite face of two groups of connecting plate clamps is provided with up and down Insertion is clamped and connected the connecting plate clip slot of plate, and connecting plate clip slot is gradually reduced from notch to slot bottom width.

Improve as a kind of, the end of push rod has the pushing block of isosceles trapezoid, two waists of pushing block are arranged "T"-shaped convex Block, arc piece clip, double gold clip, connecting plate clip, contact clip is respectively provided with two groups of slide blocks, setting and projection on two groups of slide blocks The groove matching, when pushing block promotes forward, pushing block pushes slide block open to both sides, when pushing block resets backward pushing block band movable slider in Portion resets.

The beneficial effects of the utility model：On fixture, the fit structure according to workpiece arranges five groups of different clips and presss from both sides Hold five kinds of workpiece, fixture is arranged on the disk peripheral of middle part, the rotation with rotating disk carries out workpiece by the feeding structure of periphery Feeding, then automatic welding is carried out to the workpiece having clamped by the bonding machine of periphery, it is to avoid during original multi-work piece manual welding The product defects that deviations are brought, on the one hand substantially increases work efficiency, and one side high precision is easier to ensure that product Quality.

Brief description

Fig. 1 is the perspective view of this utility model striking board clamp.

Fig. 2 is the stereochemical structure exploded perspective view of this utility model striking board clamp.

Fig. 3 is the perspective view of the clip slot in this utility model striking board clamp taking double gold clips as a example.In figure： Mounting seat 1；Chute 11；Double gold limited blocks 12；Push rod 2；Pushing block 21；Projection 22；Arc piece clip 3；Arc piece clip slot 31；Arc piece clamp 32；Double gold clips 4；Double gold clip slots 41；Double gold clamps 42；Connecting plate clip 5；Connecting plate clip slot 51；Connecting plate clamp 52；Contact Clip 6；Contact clamping part 61；Contact clamp 62；Copper cash clip 7；Copper cash clamping part 71；Fixed rack 71a；Dynamic support 71b；Place Platform 71c；Limited wall 71d；Briquetting 71e；Groove 71f；Rotating part 72；Press section 73；Slide block 8；Groove 9；Arc piece a；Double gold b；Even Fishplate bar c；Contact d；Copper cash e.

Specific embodiment

Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.

As shown in Figure 1, 2, 3, be this utility model striking board clamp a kind of specific embodiment.This embodiment includes installing Seat 1, multiple push rod 2, arc piece clip 3, double gold clip 4, connecting plate clip 5, contact clip 6 and copper cash clip 7, arc piece clip 3, Double gold clips 4, connecting plate clip 5, contact clip 6 are slidably arranged in mounting seat 1 from top to bottom successively, multiple push rods 2 It is located in mounting seat 1 and be connected cooperation, arc piece with arc piece clip 3, double gold clip 4, connecting plate clip 5, contact clip 6 respectively Clip 3, double gold clip 4, connecting plate clip 5, contact clip 6 are opened by the propulsion of respective push rod 2 or retrogressing or are closed up； Copper cash clip 7 is arranged on mounting seat 1 bottom, and copper cash clip 7 passes through Unscrew or closes up.

As shown in 1,2 figures, run-on tab workpiece integrally includes arc piece a, double gold b, connecting plate c, contact d and copper cash e, wherein arc Piece a, double gold b, connecting plate c, contact d are hard material, copper cash e relatively for flexible material, arc piece a, double gold b, connecting plate c according to Secondary be welded to connect up and down, one end of copper cash e welding double gold b, the other end welds contact d；This fixture is arranged on disk edge, and Rotating disk neighboring arranges feeding device and the welder of each workpiece, and the rotation of rotating disk makes the fixture of periphery reach different stations Complete the operation of different station feeding or welding, realize opening and closing up of each clip by cylinder, copper cash e is because of its position It is provided with the fit structure different from other clips with the particularity of material, be conducive to gripping of copper cash e.According to run-on tab The position relationship of each sub- workpiece, can complete the feeding of double gold b and contact d first, promote push rod 2 by cylinder, push rod 2 is opened double Golden clip 4 and contact clip 6, double gold b and contact d of hard convey, by mechanical hand, the exhaust hood retraction that puts in place, are arranged by push rod 2 Return springs retraction order double gold clips 4 and contact clip 6 close up clamping double gold b and contact d；Then carry out the upper of copper cash e Material, cylinder is directly and the structure of rotation is backed down in copper cash clip 7 cooperation, makes copper cash clip 7 open for copper cash e feeding, copper cash e feeding The exhaust hood that puts in place bounces back, and clamps copper cash e also by return springs reset copper cash clip 7, and the two ends of copper cash e are respectively positioned at double On golden b and contact d；Rear jig rotate to welder and complete copper cash e and double gold b, the welding job of copper cash e and contact d； Arc piece a is located at the top of double gold b, and connecting plate c is located at the lower section of double gold b, and arc piece a and connecting plate c passes through respective feeding device Operation navigates on arc piece clip 3 and connecting plate clip 5, and complete to weld by welder, thus processing complete Run-on tab workpiece is overall.Fixture of the present utility model is reasonably distributed multiple clips on same fixture, completes to there being position The positioning clamping of each sub- workpiece of run-on tab workpiece that relation limits, thus realizing automatic charging and automatic welding, realizes to specific Complex combination workpiece automatization processing possibility, improve working (machining) efficiency it is ensured that the position between each workpiece is accurately welded；Overcome Original manual assembly welding efficiency is low, and between workpiece, welding position is subject to artificial affecting big, yield rate low many defects.

As a kind of improved specific embodiment, contact clip 6 includes two groups of slide blocks 8 and contact clamp 62, two groups of cunnings Block 8 and contact clamp 62 are respectively mounted, and slide block 8 is slidably disposed in the chute 11 of mounting seat 1, and contact clamp 62 is pacified relatively Dress seat 1 extends to side and is upwardly formed the contact clamping part 61 corresponding with double gold clip 4 height and positions, and copper cash clip 7 wraps Include copper cash clamping part 71, copper cash clamping part 71 is located between double gold clips 4 and contact clamping part 61.Contact clip 6 adopts to two Contact clamp 62 structure that sideslip flowing mode is opened, can concede more spacious space to both sides, reach contact d for mechanical hand Position between contact clamp 62, then contact clip 6 relatively close up and be adapted to the shape of contact d from both sides and firmly clamp, fixed The position of position contact d；Slide block 8 is arranged in chute 11, the front surface transverse horizontal setting of chute 11 opposed jaw, and slide block 8 exists Slip off to both sides in chute 11 or close up；According to contact d, copper cash e, double gold b three cooperation position relation, specifically arrange contact The shape of clamp 62 extends at the side adaptation height of double gold clips 4, and copper cash clamping part 71 is arranged on contact clamp 62 And double gold clip 4 between, formed coupling contact d, copper cash e, double gold b assembly relation clip structure, contact clip can be passed through 6th, copper cash clip 7, the positioning workpiece of double gold clip 4 three complete contact d, copper cash e, double gold b be accurately positioned clamping, and left and right The structure of clamping is conducive to the connecting portion that welding machine stretches into contact d and copper cash e, copper cash e and double gold b from upper and lower orientation to weld Connect, rational in infrastructure, it is easy to arrange；Copper cash clamping part 71 clamps the middle part of copper cash e, does not affect the welding position of both sides.

As a kind of improved specific embodiment, copper cash clamping part 71 includes fixed rack 71a and dynamic support 71b, fixed Frame 71a is fixedly installed in mounting seat 1, fixed rack 71a is provided with the mounting table 71c placing copper cash and is located at mounting table 71c The limited wall 71d of side, dynamic support 71b is rotatably arranged on fixed rack 71a, and dynamic support 71b is provided with and limited wall The briquetting 71e of 71d cooperation.Copper cash e quality be softer can deformation structure, the mounting table that therefore setting is located on fixed rack 71a 71c to carry copper cash e from below, and coordinates folder before and after the briquetting 71e on the limited wall 71d and dynamic support 71b on fixed rack 71a Tight copper cash e, is conducive to the positioning of copper cash e it is ensured that the accurate positioning of the end of copper cash e both sides and contact d, double gold b；Copper cash e institute Position at do not weld demand, fixed rack 71a and dynamic support 71b therefore can be set from the bottom up, and top clamps copper cash e, Be conducive to mechanical hand from open top feeding.

As a kind of improved specific embodiment, mounting table 71c is the convex block structure being formed on fixed rack 71a, The groove 71f accommodating this convex block structure is had on dynamic support 71b.Convex block structure and groove 71f define good cooperation Relation, groove 71f has certain depth, and, when Unscrew puts in place, the convex block structure of mounting table 71c is not for briquetting 71e Groove 71f can be deviate from, be conducive to that briquetting 71e's is spacing, during dynamic support 71b spinning reduction, briquetting 71e can smooth accurate fit Limited wall 71d pushes down the copper cash e on positioning mounting table 71c；Thus increased activity between fixed rack 71a and dynamic support 71b Stability, improves clamping effect and clamp precision.

As a kind of improved specific embodiment, copper cash clip 7 also includes rotating part 72 and press section 73, dynamic support 71b, rotating part 72, press section 73 set gradually, and rotating part 72 is rotatably arranged in the middle part of fixed rack 71a, press section 73 with Leave gap between fixed rack 71a and offseted by elastic component.Dynamic support 71b, rotating part 72, press section 73 set gradually and are formed Lever construction, advances press section 73 by the cylinder that front is arranged, makes briquetting 71e relative to fixed rack 71a Unscrew, copper cash e Deliver to behind position by feeding device, cylinder withdraws, elastic component fight back press section 73 resets, briquetting 71e resets and limited wall 71d cooperation Clamp copper cash e, above structure simply facilitates implementation, stability is higher to be conducive to life-time service.

As a kind of improved specific embodiment, arc piece clip 3 includes two groups of slide blocks 8 and arc piece clamp 32, two groups of cunnings Block 8 and arc piece clamp 32 are respectively mounted, and slide block 8 is slidably disposed in the chute 11 of mounting seat 1, two groups of arc piece clamps 32 The arc piece clip slot 31 that up/down perforation clamps arc piece is provided with opposite face, arc piece clip slot 31 gradually subtracts from notch to slot bottom width Little.According to the concrete structure of arc piece a, arc piece clamp 32 arranges up/down perforation arc piece clip slot 31, arc piece clip slot 31 is corresponding There is certain angle and adapt to arc piece a concrete angle in shape, and arc piece clip slot 31 is arranged to, and notch is larger, bottom land is less Section is in the structure of isosceles trapezoid, is easy to the entrance arc piece clip slot 31 of arc piece a relative ease, when arc piece clip slot 31 clamps, groove The less structure in bottom completes the firm clamping of arc piece a, reduces the arc piece clip slot 31 of arc piece clamp 32 in clamping process to arc piece a Friction, reduce workpiece abrasion, reduction in the numbers of seconds it is ensured that run-on tab one-piece machine member machine after product quality.

As a kind of improved specific embodiment, double gold clips 4 include two groups of slide blocks 8 and double gold clamp 42, two groups of cunnings Block 8 and double gold clamp 42 are respectively mounted, and slide block 8 is slidably disposed in the chute 11 of mounting seat 1, and double gold clamps 42 are arranged There are double gold clip slots 41 of the double gold of before and after's insertion clamping, double gold clip slots 41 are gradually reduced from notch to slot bottom width.Double gold b are in positioning When keep level, be easy to side and copper cash e cooperation positioning, top and arc piece a cooperation positioning, bottom and connecting plate c cooperation positioning； The laminated structure being rule because of couple gold b, can arrange double gold clip slots 41, double gold clamps of opposite side on double gold clamps 42 42 prop up double gold b using plane carries out clamping position, the longer double gold b of order can convenient feeding, be welded into one in all workpiece When run-on tab one-piece machine member being taken off discharging from fixture after body, after each clip releases clamping, one-piece machine member clamped by mechanical hand Bigger activity space activity can be had to depart from fixture.And double gold clip slot 41 is arranged to that notch is larger, the less section of bottom land is in The structure of isosceles trapezoid, is easy to entrance double gold clip slot 41 of double gold b relative ease, and when double gold clip slots 41 clamp, bottom land is less Structure complete the firm clamping of double gold b, the double gold clip slots 41 reducing double gold clamps 42 rub to double gold b in clamping process Wipe, reduce workpiece abrasion, reduction in the numbers of seconds it is ensured that run-on tab one-piece machine member machine after product quality.

As a kind of improved specific embodiment, mounting seat 1 is additionally provided with the double gold limited blocks 12 supporting double gold, double Golden limited block 12 is matched with the height of double gold clip slots 41.Clamp the stability of double gold b for improving double gold clamps 42, in mounting seat Double gold limited blocks 12 are set on 1, and when feeding puts in place, double gold b can be shelved on double gold limits near one end of mounting seat 1 to double gold b On the block 12 of position, thus realizing good carrying double gold b, improve the stability of double gold b clamping positions it is ensured that the position of positioning welding Accurately, improve yield rate.

As a kind of improved specific embodiment, connecting plate clip 5 includes two groups of slide blocks 8 and connecting plate clamp 52, and two Group slide block 8 and connecting plate clamp 52 are respectively mounted, and slide block 8 is slidably disposed in the chute 11 of mounting seat 1, two groups of connecting plates Up/down perforation is provided with the opposite face of clamp 52 be clamped and connected the connecting plate clip slot 51 of plate, connecting plate clip slot 51 is from notch to groove Bottom width degree is gradually reduced.According to the concrete structure of connecting plate c, up/down perforation connecting plate clip slot is arranged on connecting plate clamp 52 51, connecting plate clip slot 51 has certain angle accordingly and adapts to connecting plate c concrete angle in shape, and connecting plate clip slot 51 It is arranged to the structure that notch is larger, the less section of bottom land is in isosceles trapezoid, be easy to the entrance connecting plate of connecting plate c relative ease Clip slot 51, when connecting plate clip slot 51 clamps, the less structure of bottom land completes the firm clamping of connecting plate c, reduces connecting plate folder The friction to connecting plate c in clamping process of the connecting plate clip slot 51 of body 52, reduce workpiece abrasion, reduction in the numbers of seconds it is ensured that Run-on tab one-piece machine member machine after product quality.

As a kind of improved specific embodiment, the end of push rod 2 has a pushing block 21 of isosceles trapezoid, and the two of pushing block 21 "T"-shaped projection 22 is arranged on waist, arc piece clip 3, double gold clip 4, connecting plate clip 5, contact clip 6 are respectively provided with two groups of cunnings Block 8, two groups of slide blocks 8 arranges the groove 9 matching with projection 22, when pushing block 21 promotes forward, pushing block 21 pushes cunning open to both sides Block, when pushing block 21 resets backward, pushing block 21 band movable slider resets to middle part.On "T"-shaped projection 22 insertion slide block 8 on pushing block 21 Groove 9 in, define the structure of mutual restriction linkage；Pushing block 21 is isosceles trapezoid, when cylinder promotes pushing block 21 to push ahead, Two waists can back down slide block 8 to both sides, and slide block 8 to two Slideslips in chute 11, open to both sides by clip；When cylinder withdraws, push away Block 21 relies on the elastic components such as spring to reset, and pushing block 21 is withdrawn to be slided in groove 9 by projection 22 and withdraws slide block 8, structure Ingenious facilitate implementation, less structure reduces the volume of fixture, and makes the activity of two side slide 8 synchronous precision, is easy to press from both sides The positioning of son and clamping.

Claims (10)

1. a kind of striking board clamp it is characterised in that：Including mounting seat (1), multiple push rod (2), arc piece clip (3), double gold folder Sub (4), connecting plate clip (5), contact clip (6) and copper cash clip (7), described arc piece clip (3), double gold clip (4), connection Plate clip (5), contact clip (6) are slidably arranged in mounting seat (1) from top to bottom successively, and multiple described push rods (2) are worn It is located in mounting seat (1) and be connected with arc piece clip (3), double gold clip (4), connecting plate clip (5), contact clip (6) respectively Cooperation, described arc piece clip (3), double gold clip (4), connecting plate clip (5), contact clip (6) pass through pushing away of respective push rod (2) Enter or retreat to be opened or close up；Described copper cash clip (7) is arranged on mounting seat (1) bottom, and described copper cash clip (7) is passed through Unscrew or close up.

2. a kind of striking board clamp according to claim 1 it is characterised in that：Described contact clip (6) includes two groups of cunnings Block (8) and contact clamp (62), two groups of slide blocks (8) and contact clamp (62) are respectively mounted, and described slide block (8) is slidably arranged In the chute (11) of mounting seat (1), described contact clamp (62) is mounted opposite seat (1) and extends to side and be upwardly formed and double The corresponding contact clamping part (61) of golden clip (4) height and position, described copper cash clip (7) includes copper cash clamping part (71), institute State copper cash clamping part (71) to be located between double gold clip (4) and contact clamping part (61).

3. a kind of striking board clamp according to claim 2 it is characterised in that：Described copper cash clamping part (71) includes fixed Frame (71a) and dynamic support (71b), described fixed rack (71a) is fixedly installed in mounting seat (1), and described fixed rack (71a) sets The limited wall (71d) being equipped with the mounting table (71c) placing copper cash and being located at mounting table (71c) side, described dynamic support (71b) can Being arranged on fixed rack (71a) of rotation, described dynamic support (71b) is provided with the briquetting being coordinated with limited wall (71d) (71e).

4. a kind of striking board clamp according to claim 3 it is characterised in that：Described mounting table (71c) is in fixed rack (71a) the upper convex block structure being formed, described dynamic support (71b) has the groove (71f) accommodating this convex block structure.

5. a kind of striking board clamp according to claim 3 or 4 it is characterised in that：Described copper cash clip (7) also includes revolving Transfer part (72) and press section (73), described dynamic support (71b), rotating part (72), press section (73) set gradually, described rotating part (72) it is rotatably arranged in the middle part of fixed rack (71a), leave gap between described press section (73) and fixed rack (71a) and lead to Cross elastic component to offset.

6. a kind of striking board clamp according to claim 1 or 2 or 3 or 4 it is characterised in that：Described arc piece clip (3) bag Include two groups of slide blocks (8) and arc piece clamp (32), two groups of slide blocks (8) and arc piece clamp (32) are respectively mounted, and described slide block (8) can slide In the dynamic chute (11) being arranged on mounting seat (1), the opposite face of arc piece clamp (32) described in two groups is provided with up/down perforation Arc piece clip slot (31) of clamping arc piece, described arc piece clip slot (31) is gradually reduced from notch to slot bottom width.

7. a kind of striking board clamp according to claim 1 or 2 or 3 or 4 it is characterised in that：Described double gold clip (4) bag Include two groups of slide blocks (8) and double gold clamp (42), two groups of slide blocks (8) and double gold clamp (42) are respectively mounted, and described slide block (8) can slide In the dynamic chute (11) being arranged on mounting seat (1), described double gold clamp (42) are provided with the double of the double gold of before and after's insertion clamping Golden clip slot (41), described double gold clip slot (41) are gradually reduced from notch to slot bottom width.

8. a kind of striking board clamp according to claim 7 it is characterised in that：It is additionally provided with described mounting seat (1) and prop up Hold double gold limited block (12) of double gold, described double gold limited block (12) are matched with the height of double gold clip slot (41).

9. a kind of striking board clamp according to claim 1 or 2 or 3 or 4 it is characterised in that：Described connecting plate clip (5) Including two groups of slide blocks (8) and connecting plate clamp (52), two groups of slide blocks (8) and connecting plate clamp (52) are respectively mounted, described slide block (8) it is slidably disposed in the chute (11) of mounting seat (1), the opposite face of connecting plate clamp (52) described in two groups is provided with Up/down perforation is clamped and connected the connecting plate clip slot (51) of plate, and described connecting plate clip slot (51) gradually subtracts from notch to slot bottom width Little.

10. a kind of striking board clamp according to claim 1 or 2 or 3 or 4 it is characterised in that：The end of described push rod (2) Portion has the pushing block (21) of isosceles trapezoid, and two waists of described pushing block (21) arrange "T"-shaped projection (22), described arc piece clip (3), double gold clips (4), connecting plate clip (5), be respectively provided with two groups of slide blocks (8), slide block (8) described in two groups on contact clip (6) The groove (9) that upper setting is matched with projection (22), when described pushing block (21) promotes forward, pushing block (21) pushes slide block open to both sides, When described pushing block (21) resets backward, pushing block (21) band movable slider resets to middle part.