CN211497842U

CN211497842U - Electroplating clamping frame

Info

Publication number: CN211497842U
Application number: CN202020175260.3U
Authority: CN
Inventors: 曹维龙
Original assignee: Shanghai Yuji Metal Products Co ltd
Current assignee: Shanghai Yuji Metal Products Co ltd
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-09-15
Anticipated expiration: 2030-02-17

Abstract

The utility model relates to an electroplating clamping frame relates to the technical field that the metal was electroplated, including the support body, be provided with on the support body and hang the connecting device that the pole is connected, connecting device includes dead lever, mounting panel, locking Assembly, and the dead lever setting is on the support body, and the mounting panel setting is on the dead lever and the joint is installed on hanging the pole and is C shape, and the locking Assembly setting is on the mounting panel and fixes the mounting panel on hanging the pole. The utility model discloses an install the mounting panel joint and hang on the pole, then fix the mounting panel on hanging the pole through the locking subassembly to this has reduced the support body and has hung gliding probability on the pole, has reduced the probability that the support body rocked, has reduced the probability that the part dropped from the electrolysis anchor clamps, thereby has improved the electroplating quality of part.

Description

Electroplating clamping frame

Technical Field

The utility model relates to a technical field that the metal was electroplated especially relates to an electroplating clamping frame.

Background

Electroplating is a process of plating a thin layer of other metals or alloys on the surface of some metals by using the principle of electrolysis, and is a process of attaching a layer of metal film on the surface of a metal or other material product by using the action of electrolysis so as to prevent the oxidation (such as corrosion) of the metal, improve the wear resistance, the conductivity, the light reflection property, the corrosion resistance, the beauty and the like. Electroplating generally involves placing the part in an electroplating bath of the anode (e.g., zinc) of the plating metal or other insoluble material, the cathode of the part to be plated, and a solution containing the cations of the plating metal.

In the prior art, reference may be made to the chinese patent application publication No. CN109518261A, which discloses an electroplating fixture, including a frame body, a fixing member for fixing parts, the fixing member being powered on, and a movable portion for moving the fixing member, the fixing member including a support rod rotatably connected to the frame body, and a plurality of plug connectors disposed on the support rod; the movable part comprises a driving piece which drives the supporting rod to enable the plug connector to rotate on the vertical surface; the movable part also comprises a plurality of balancing rods which are rotatably connected to the frame body and a linkage rod which is connected with the balancing rods, and the balancing rods are arranged at intervals along the vertical direction; the support rods are fixed on the balance rods, and one ends of the balance rods are rotatably connected to the linkage rods. Communicating the fixture with the cathode; inserting the parts on the plug connectors, before the frame body enters the electroplating solution, rotating the plug connectors to a state that the opening ends of the parts face upwards and the ring ends of the parts face downwards by the driving part, and gradually descending the parts into the electroplating solution to ensure that the electroplating solution can be completely electroplated in the shell and the inner wall of the shell is completely electroplated; after the electroplating is finished, the plug connector is rotated through the driving piece, so that the opening end of the part faces downwards, residual electroplating solution in the shell is poured out, the condition that the electroplating is complete can be ensured, and the residual electroplating solution effect can not be generated after the electroplating solution is taken out.

The technical scheme has the following defects: generally use hoist and mount jacking equipment to go on when falling into the plating solution with the part, because the electroplating bath that holds the plating solution is great, be provided with on the general jacking equipment and hang the pole, hang and hang a plurality of electrolysis anchor clamps through the couple on the pole, but jacking equipment receives the effect of external force easily in the motion process, therefore the couple produces easily and slides to lead to the electrolysis anchor clamps to rock easily, lead to the part to drop from the electrolysis anchor clamps, thereby can lead to the electroplating quality who has reduced the part.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electroplate clamping frame, locking subassembly are fixed the mounting panel on hanging the pole to this has reduced the support body and has hung gliding probability on the pole, has reduced the probability that the support body rocked, has reduced the probability that the part dropped from the electrolysis anchor clamps, thereby has improved the electroplating quality of part.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides an electroplating clamping frame, includes the support body, be provided with on the support body and hang the connecting device that the pole is connected, connecting device includes dead lever, mounting panel, locking subassembly, the dead lever sets up on the support body, the mounting panel sets up on the dead lever and the joint is installed on hanging the pole and is C shape, the locking subassembly sets up on the mounting panel and fixes the mounting panel on hanging the pole.

By adopting the technical scheme, the mounting plate is clamped and mounted on the suspension rod, and then the locking assembly is closed to fix the mounting plate on the suspension rod; when the support body needs to be taken down, the locking assembly is opened, the fixing rod can be detached from the suspension rod, the mounting plate is fixed on the suspension rod through the locking assembly, the probability that the support body slides on the suspension rod is reduced, the probability that the support body shakes is reduced, the probability that parts drop from the electrolytic clamp is reduced, and therefore the electroplating quality of the parts is improved.

Preferably, the locking assembly comprises a first elastic sheet, a rotating shaft and a second elastic sheet, the first elastic sheet is arranged on a vertical side wall, close to the fixed rod, of the mounting plate and abuts against the vertical side wall of the suspension rod, the rotating shaft is horizontally and rotatably arranged on a lower side wall of the mounting plate, and the second elastic sheet is arranged on the rotating shaft and abuts against the lower side wall of the suspension rod.

By adopting the technical scheme, the mounting plate is clamped and mounted on the suspension rod, so that the first elastic piece is abutted against the vertical side wall of the suspension rod, and then the second elastic piece is rotated to be abutted against the lower side wall of the suspension rod, so that the mounting plate is positioned in the vertical direction and the horizontal direction, and the sliding probability of the frame body on the suspension rod is reduced; meanwhile, the second elastic piece is rotated to enable the second elastic piece to be far away from the suspension rod, and then the mounting plate is moved upwards to be detached from the suspension rod, so that the aim of detaching the rack body is fulfilled.

Preferably, the end of the mounting plate far away from the fixing rod is provided with a guide sheet, and the end of the guide sheet far away from the mounting plate is bent towards the side far away from the fixing rod.

Through adopting above-mentioned technical scheme, through the setting of guide vane, lead when the mounting panel is pegged graft on the suspension rod to this reaches and is convenient for install the mounting panel on the suspension rod purpose.

Preferably, the first elastic sheet and the second elastic sheet are detachably connected to the mounting plate and the rotating shaft through connecting screws respectively.

By adopting the technical scheme, after the first elastic piece and the second elastic piece are used for a period of time, the elasticity is gradually reduced, so that the first elastic piece and the second elastic piece need to be replaced; through the arrangement of the connecting screw, the purpose of conveniently replacing the first elastic sheet and the second elastic sheet is achieved.

Preferably, the mounting plate is provided with an adjusting screw which is tightly propped against the first elastic sheet.

Through adopting above-mentioned technical scheme, through adjusting screw's setting, can adjust the elasticity of first flexure strip to the vertical lateral wall of suspension rod to this reaches the fixed effect of improving first flexure strip to the mounting panel.

Preferably, a star-shaped handle is arranged at one end of the adjusting screw rod, which is far away from the first elastic sheet.

Through adopting above-mentioned technical scheme, through the setting of star type handle, the staff need not to borrow the instrument when twisting adjusting screw and can accomplish to this convenience when having improved to twist adjusting screw.

Preferably, be provided with the clamping device of clamping part on the support body, the clamping device includes movable rod, bracing piece, plug connector, driving piece, the movable rod rotates to set up on the relative both sides wall of support body and vertical array is provided with a plurality ofly, the bracing piece sets up on the movable rod and is the horizontality, the plug connector just is used for the clamping part along the setting of bracing piece axle line array on the bracing piece, the driving piece sets up on the movable rod and drives the bracing piece and makes the plug connector luffing motion.

By adopting the technical scheme, the parts are inserted and connected onto the plug connectors, before the frame body enters the electroplating solution, the plug connectors are rotated by the driving parts until the opening ends of the parts face upwards and gradually fall into the electroplating solution, and the opening ends of the parts face downwards under the action of the buoyancy of the electroplating solution by the driving parts, so that the electroplating solution can be completely plated in the shell and the inner wall of the shell is completely plated; after the electroplating is finished, the plug connector is rotated through the driving piece, so that residual electroplating solution in the shell is poured out, the electroplating completeness can be ensured, and the residual electroplating solution can not be left after the electroplating solution is taken out.

Preferably, the support rods are detachably arranged on the movable rods through a connecting assembly, the connecting assembly comprises a blocking plate and a shifting sheet, inserting grooves are formed in the side walls of the two opposite sides of the movable rods, the supporting rod is inserted in the inserting groove, the inserting groove is provided with an installation groove for the supporting rod to pass through, the mounting groove is provided with a sliding groove along the axis of the support rod, the barrier plate is arranged on the sliding groove in a sliding way through a round rod, the round bar can rotate on the sliding groove, the blocking plate is provided with a clamping block, the sliding groove is provided with a clamping groove which is clamped and matched with the clamping block, the shifting sheet is arranged on the blocking plate, when the clamping block is clamped on the clamping groove, the barrier plate is abutted against the support rod to fix the support rod, when the joint piece breaks away from the joint groove, the barrier plate is rotatable to make the bracing piece break away from the joint groove.

By adopting the technical scheme, after the types of the parts are changed, the plug connectors also need to be replaced to adapt to new types of the parts, meanwhile, the plug connectors are troublesome to replace directly on the supporting rods and can be replaced only when the electroplating work is stopped, so that more time is wasted, and the efficiency of replacing the plug connectors is low; stir the plectrum and drive the barrier plate and remove, the barrier plate removes and drives the joint piece and break away from the joint groove, then rotate the barrier plate and keep away from the bracing piece, consequently can dismantle the bracing piece from the movable rod, new bracing piece can just change the plug connector earlier at the support body during operation simultaneously, then directly install the inserting groove with new bracing piece through the mounting groove joint, then rotate the barrier plate and make the barrier plate contradict on the bracing piece, then promote the plectrum and make the joint piece joint to the joint groove on, fix the bracing piece with this, thereby reach the purpose of changing the plug connector easily, the waste of time is reduced, the efficiency of changing the plug connector is improved.

To sum up, the utility model discloses a beneficial technological effect does:

1. the installation plate is clamped and installed on the suspension rod, and then the installation plate is fixed on the suspension rod through the locking assembly, so that the sliding probability of the frame body on the suspension rod is reduced, the shaking probability of the frame body is reduced, the falling probability of parts from the electrolytic clamp is reduced, and the electroplating quality of the parts is improved;

2. the mounting plate is clamped and mounted on the suspension rod, so that the first elastic piece abuts against the vertical side wall of the suspension rod, and then the second elastic piece is rotated to abut against the lower side wall of the suspension rod, so that the mounting plate is positioned in the vertical direction and the horizontal direction, and the probability of the frame body sliding on the suspension rod is reduced; meanwhile, the second elastic piece is rotated to enable the second elastic piece to be far away from the hanging rod, and then the mounting plate is moved upwards to be detached from the hanging rod, so that the aim of detaching the frame body is fulfilled;

3. through the arrangement of the adjusting screw rod, the elasticity of the first elastic sheet to the vertical side wall of the suspension rod can be adjusted, so that the fixing effect of the first elastic sheet to the mounting plate is improved;

4. drive the joint piece through stirring the plectrum and break away from the joint groove, then rotate the barrier plate, consequently can dismantle the bracing piece from the movable rod, new bracing piece can just change earlier the plug connector at the support body during operation simultaneously, then directly with new bracing piece joint to the mounting groove on, then rotate the barrier plate and make the joint piece joint to the joint groove on, fix the bracing piece with this, thereby reach the purpose of changing the plug connector easily, the waste of time is reduced, the efficiency of changing the plug connector is improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic structural view of the locking assembly of the present invention, with the suspension rod omitted;

FIG. 3 is a schematic view of the structure of the clamping device;

fig. 4 is an exploded view of the connection assembly.

Reference numerals: 1. a frame body; 11. a connecting screw; 12. adjusting the screw rod; 13. a star-shaped handle; 14. a conductive wire; 15. a suspension rod; 2. a connecting device; 21. fixing the rod; 22. mounting a plate; 221. a guide piece; 23. a locking assembly; 231. a first elastic sheet; 232. a rotating shaft; 233. a second elastic sheet; 3. a clamping device; 31. a movable rod; 311. inserting grooves; 312. mounting grooves; 313. a sliding groove; 314. a clamping groove; 315. a rotating rod; 316. a linkage rod; 32. a support bar; 33. a plug-in unit; 34. a drive member; 4. a connecting assembly; 41. a blocking plate; 411. a round bar; 412. a clamping block; 42. a shifting sheet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for utility model's an electroplating clamping frame, including the support body 1 that is the I-shaped, be provided with on the support body 1 and hang the connecting device 2 that pole 15 is connected, connecting device 2 includes dead lever 21, mounting panel 22, locking Assembly 23.

Referring to fig. 1 and 2, the fixing rod 21 is fixedly installed on the top end of the frame body 1 in a vertical state, the mounting plate 22 is fixedly installed on the top end of the fixing rod 21, and the mounting plate 22 is installed on the suspension rod 15 in a downward clamping manner in an opening manner and is in a C shape; the locking assembly 23 is arranged on the mounting plate 22 and fixes the mounting plate 22 on the suspension rod 15, the locking assembly 23 comprises a first elastic sheet 231, a rotating shaft 232 and a second elastic sheet 233, the first elastic sheet 231 is arranged on the vertical inner side wall of the mounting plate 22 close to one side of the fixed rod 21, a gap is reserved between one end of the first elastic sheet 231 far away from the fixed rod 21 and the mounting plate 22, and meanwhile, the first elastic sheet 231 is tightly pressed against the vertical side wall of the suspension rod 15 under the elastic action; the end of the mounting plate 22 away from the fixing rod 21 is integrally provided with a guide piece 221, and the end of the guide piece 221 away from the mounting plate 22 is bent toward the side away from the fixing rod 21.

The rotating shaft 232 is rotatably mounted on the lower side wall of the guide piece 221, the second elastic piece 233 is mounted on the rotating shaft 232 and is arc-shaped and protrudes upwards, meanwhile, the second elastic piece 233 abuts against the lower side wall of the suspension rod 15, and one end of the second elastic piece 233, which is far away from the rotating shaft 232, is bent downwards; the mounting plate 22 is clamped and mounted on the suspension rod 15, so that the first elastic piece 231 abuts against the vertical side wall of the suspension rod 15, then the second elastic piece 233 is rotated by grasping the downward bent end of the second elastic piece 233, so that the second elastic piece 233 abuts against the lower side wall of the suspension rod 15, and the mounting plate 22 is positioned in the vertical direction and the horizontal direction; the second elastic piece 233 is rotated to make the second elastic piece 233 far away from the hanging rod 15, and then the mounting plate 22 can be removed from the hanging rod 15 by moving the mounting plate 22 upwards, thereby achieving the purpose of removing the frame body 1.

The first elastic piece 231 and the second elastic piece 233 are detachably mounted on the mounting plate 22 and the rotating shaft 232 through the connecting screws 11, so that the purpose of conveniently replacing the first elastic piece 231 and the second elastic piece 233 is achieved; on the mounting panel 22 and be close to the lateral wall on dead lever 21 one side on be provided with the adjusting screw 12 that the level passed mounting panel 22 and with mounting panel 22 threaded connection, and adjusting screw 12 supports tightly on first flexure strip 231 leaves gapped one end with mounting panel 22, twists adjusting screw 12 and adjusts the elasticity of first flexure strip 231 to the vertical lateral wall of suspension rod 15 to this fixed effect of first flexure strip 231 to mounting panel 22 improves. The star-shaped handle 13 is fixedly mounted at one end of the adjusting screw 12 far away from the first elastic piece 231, so that a worker can screw the adjusting screw 12 without using tools, and convenience in screwing the adjusting screw 12 is improved.

Referring to fig. 3, a frame body 1 is provided with a clamping device 3 for clamping parts, the clamping device 3 comprises a plurality of movable rods 31, a plurality of support rods 32, a plug connector 33 and a driving piece 34, the movable rods 31 are rotatably mounted on two opposite side walls of the frame body 1 through rotating rods 315, a plurality of movable rods 31 are vertically arranged in an array manner, the distance from one end of each movable rod 31, which is far away from the frame body 1, to each rotating rod 315 is greater than the distance from one end of each movable rod 31, which is close to the frame body 1, to each rotating rod 315, one end of each movable rod 31, which is far away from the frame body 1, is provided with a vertical linkage; the support rods 32 are arranged on the side walls of the two opposite sides of the two movable rods 31, a plurality of plug connectors 33 are arranged along the axis of the support rods 32 in an array mode, and the plug connectors 33 are arranged on the support rods 32 in an inserted mode; the driving piece 34 is arranged on the side wall of the linkage rod 316 close to the bottom end of the linkage rod 316, and the driving piece 34 is a hollow plastic pipe; the frame body 1 is provided with a conductive wire 14 for conducting electricity to the support rod 32.

Inserting the parts on the plug-in components 33, before the frame body 1 enters the electroplating solution, rotating the plug-in components 33 by the driving parts 34 until the open ends of the parts face upwards, and gradually lowering the parts into the electroplating solution, wherein the open ends of the parts face downwards under the action of the buoyancy of the electroplating solution by the driving parts 34, so that the electroplating solution can be completely plated in the shell, and the inner wall of the shell is completely plated; after the electroplating is finished, the plug connector 33 is rotated through the driving piece 34, so that residual electroplating solution in the shell is poured out, the electroplating is ensured to be complete, and the effect of electroplating solution residue is avoided after the electroplating solution is taken out.

Referring to fig. 3 and 4, the support rods 32 are detachably disposed on the movable rods 31 through the connection assembly 4, the connection assembly 4 includes a blocking plate 41 and a shifting piece 42, insertion grooves 311 are formed on the side walls of the two movable rods 31 on opposite sides, the support rods 32 are inserted into the insertion grooves 311, and the conductive wires 14 are inserted into the support rods 32, so that the conductive wires 14 can be conveniently detached and mounted when the support rods 32 are replaced; the inserting groove 311 is provided with a mounting groove 312 for the support rod 32 to pass through, and the mounting groove 312 is provided along the axis of the support rod 32, the side wall of the mounting groove 312 far away from the support bar 32 is located at one side of the bottom of the inserting groove 311 far away from the support bar 32, the side wall of the mounting groove 312 far away from the support bar 32 is provided with a sliding groove 313 along the axis of the support bar 32, and the projection of the sliding groove 313 and the mounting groove 312 in the vertical direction has an intersection, the blocking plate 41 slides on the sliding groove 313 through the round rod 411, and the blocking plate 41 can slide along the axis of the support rod 32 and can rotate on the sliding groove 313, meanwhile, the side wall of the blocking plate 41 away from the rotating shaft 232 and close to the mounting groove 312 is fixedly provided with a clamping block 412, the mounting groove 312 is provided with a clamping groove 314 in clamping fit with the clamping block 412, the clamping groove 314 is communicated with the side wall of the movable rod 31 close to one side of the support rod 32, and the shifting piece 42 is fixedly arranged on the side wall of the blocking plate 41 far away from one side of the support rod 32; when the engaging member 412 is engaged with the engaging groove 314, the blocking plate 41 abuts against the supporting rod 32 to fix the supporting rod 32, and when the engaging member 412 is disengaged from the engaging groove 314, the blocking plate 41 can rotate to disengage the supporting rod 32 from the engaging groove 314.

Stir plectrum 42 and drive barrier plate 41 and remove, barrier plate 41 removes and drives joint piece 412 and break away from joint groove 314, then rotate barrier plate 41 and keep away from bracing piece 32, consequently can dismantle bracing piece 32 from movable rod 31, the bracing piece 32 that is new simultaneously can just change plug connector 33 earlier when support body 1 is worked, then directly install new bracing piece 32 on inserting groove 311 through mounting groove 312 joint, then rotate barrier plate 41 and make barrier plate 41 contradict on bracing piece 32, then promote plectrum 42 and make joint piece 412 joint to joint groove 314 on, fix bracing piece 32 with this, thereby reach the purpose of changing plug connector 33 easily.

The implementation principle of the embodiment is as follows:

the mounting plate 22 is clamped and mounted on the suspension rod 15, so that the first elastic piece 231 abuts against the vertical side wall of the suspension rod 15, then the second elastic piece 233 is rotated to enable the second elastic piece 233 to abut against the lower side wall of the suspension rod 15, and the mounting plate 22 is positioned in the vertical direction and the horizontal direction, so that the probability that the frame body 1 slides on the suspension rod 15 is reduced, the probability that the frame body 1 shakes is reduced, the probability that parts fall off from the frame body 1 is reduced, and the electroplating quality of the parts is improved; the second elastic piece 233 is rotated to make the second elastic piece 233 far away from the hanging rod 15, and then the mounting plate 22 can be removed from the hanging rod 15 by moving the mounting plate 22 upwards, thereby achieving the purpose of removing the frame body 1.

Stir plectrum 42 and drive joint piece 412 and break away from joint groove 314, then rotate barrier plate 41 and can dismantle bracing piece 32 from movable rod 31, bracing piece 32 new simultaneously can just change plug connector 33 earlier when support body 1 is worked, then directly install new bracing piece 32 on inserting groove 311 through mounting groove 312 joint, then rotate barrier plate 41 and make barrier plate 41 contradict on bracing piece 32, then promote plectrum 42 and make joint piece 412 joint to joint groove 314, fix bracing piece 32 with this, thereby reach the purpose of changing plug connector 33 easily, the time is saved, the efficiency of changing plug connector 33 is improved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides an electroplating clamping frame, includes support body (1), its characterized in that: be provided with connecting device (2) be connected with suspension rod (15) on support body (1), connecting device (2) include dead lever (21), mounting panel (22), locking Assembly (23), dead lever (21) set up on support body (1), mounting panel (22) set up on dead lever (21) and the joint is installed on suspension rod (15) and is C shape, locking Assembly (23) set up on mounting panel (22) and fix mounting panel (22) on suspension rod (15).

2. An electroplating clamping frame according to claim 1, characterized in that: the locking assembly (23) comprises a first elastic sheet (231), a rotating shaft (232) and a second elastic sheet (233), wherein the first elastic sheet (231) is arranged on a vertical side wall, close to the fixing rod (21), of the mounting plate (22) and abuts against a vertical side wall of the suspension rod (15), the rotating shaft (232) is horizontally arranged on a lower side wall of the mounting plate (22) in a rotating mode, and the second elastic sheet (233) is arranged on the rotating shaft (232) and abuts against a lower side wall of the suspension rod (15).

3. An electroplating clamping frame according to claim 1, characterized in that: the one end that dead lever (21) was kept away from in mounting panel (22) is provided with guide vane (221), just the one end orientation that mounting panel (22) were kept away from in guide vane (221) is kept away from dead lever (21) one side bending.

4. An electroplating clamping frame according to claim 2, characterized in that: the first elastic piece (231) and the second elastic piece (233) are detachably connected to the mounting plate (22) and the rotating shaft (232) through connecting screws (11).

5. An electroplating clamping frame according to claim 1, characterized in that: the mounting plate (22) is provided with an adjusting screw rod (12) which is tightly propped against the first elastic sheet (231).

6. An electroplating clamping frame according to claim 5, characterized in that: a star-shaped handle (13) is arranged at one end of the adjusting screw rod (12) far away from the first elastic sheet (231).

7. An electroplating clamping frame according to claim 1, characterized in that: be provided with clamping device (3) of clamping part on support body (1), clamping device (3) are including movable rod (31), bracing piece (32), plug connector (33), driving piece (34), movable rod (31) rotate to set up on support body (1) relative both sides wall and vertical array is provided with a plurality ofly, bracing piece (32) set up on movable rod (31) and are the horizontality, plug connector (33) are along bracing piece (32) axis array setting on bracing piece (32) and are used for the clamping part, driving piece (34) set up on movable rod (31) and drive bracing piece (32) make plug connector (33) luffing motion.

8. An electroplating clamping frame according to claim 7, characterized in that: the support rod (32) is detachably arranged on the movable rod (31) through a connecting assembly (4), the connecting assembly (4) comprises a blocking plate (41) and a shifting piece (42), two side walls of one side, opposite to the movable rod (31), of the movable rod (31) are provided with inserting grooves (311), the support rod (32) is inserted into the inserting grooves (311) and provided with mounting grooves (312) for the support rod (32) to pass through, the mounting grooves (312) are provided with sliding grooves (313) along the axis of the support rod (32), the blocking plate (41) is arranged on the sliding grooves (313) in a sliding mode through a round rod (411), the round rod (411) can rotate on the sliding grooves (313), the blocking plate (41) is provided with a clamping block (412), the sliding grooves (313) are provided with clamping grooves (314) matched with the clamping block (412) in a clamping mode, plectrum (42) set up on barrier plate (41), work as when joint piece (412) joint is to joint groove (314), barrier plate (41) are contradicted and are come fixed support rod (32) on bracing piece (32), when joint piece (412) break away from joint groove (314), barrier plate (41) are rotatable to make bracing piece (32) can break away from joint groove (314).