CN117100071A

CN117100071A - Aluminum alloy integrative separation handle mounting structure

Info

Publication number: CN117100071A
Application number: CN202311203450.6A
Authority: CN
Inventors: 刘消炼
Original assignee: Jiangxi Laibo'er Laboratory Equipment Manufacturing Co ltd
Current assignee: Jiangxi Laibo'er Laboratory Equipment Manufacturing Co ltd
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2023-11-24

Abstract

The invention provides an aluminum alloy integrated separation handle mounting structure, which relates to the technical field of handle devices and comprises a handle plate and two groups of door cabinet bodies, wherein the two groups of door cabinet bodies are respectively positioned at the left side and the right side of the handle plate, the front end of the handle plate is movably connected with a pulling plate, the surface of the pulling plate is fixedly connected with a control plate, the upper end and the lower end of the inner side of the handle plate are respectively fixedly connected with a separation mechanism, and the two groups of separation mechanisms are distributed in opposite directions.

Description

Aluminum alloy integrative separation handle mounting structure

Technical Field

The invention relates to the technical field of handle devices, in particular to an aluminum alloy integrated separation handle mounting structure.

Background

The handle is a device which is convenient for pulling a certain object and realizing the movement of the object in a certain space, most commonly like a door cabinet handle, the device can be convenient for opening a door cabinet body, so that operations such as taking, storing and the like are performed, the handle on the market at present is divided into materials such as plastic, stainless steel or aluminum alloy according to different use environments, and the handle is separated from a fixed handle according to different use conditions and installation modes to provide selection.

The hidden handle disclosed in the Chinese patent application publication CN103206109B is hidden in the accommodating cavity and fixed with the base body through the locking structure, the outer surface of the flip can be completely flush with the outer mounting surface, the appearance is good in decoration, collision is effectively prevented, the external space is not occupied, the transportation and the packaging are convenient, bacteria and dust are prevented from accumulating on the handle, the hidden handle is particularly suitable for a disinfection cabinet, and the flip can be used as the handle by only unlocking the flip during use.

But this kind of hidden handle only can provide the operation that opens and shuts of single group's cabinet, and under the more circumstances of cabinet, most handles can influence pleasing to the eye, and the handle is fixed with the cabinet through the bolt screw all, the handle is difficult for carrying out the change operation after damaging, in addition, present separation handle does not have the operation of locking, under the condition that the cabinet is opened to the hope, traditional handle can not be through better locking theftproof effect, there is a separation handle on the market at last, realize pulling cabinet through the mode of interior knot, this kind of handle pleasing to the eye effect is higher, but the finger is pressed from both sides easily in the use.

Disclosure of Invention

The invention aims to solve the defects of the prior art, such as a handle and door cabinet fixing mode, no anti-theft effect and the like, and provides an aluminum alloy integrated separation handle mounting structure.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides an integrative separation handle mounting structure of aluminum alloy, includes handle board and two sets of cabinet door bodies, two sets of the cabinet door body is located the left and right sides of handle board respectively, the front end swing joint of handle board has the board of dialling, the fixed surface who dials the board has the control panel, the inboard upper and lower both ends of handle board are fixedly connected with separating mechanism respectively, and are opposite distribution between two sets of separating mechanism, the back fixedly connected with locking mechanism of dialling the board, the rear end fixedly connected with stop gear of handle board.

As a preferred implementation mode, the separating mechanism comprises driving teeth, a movable sleeve plate, a meshing groove, two groups of pushing rods, a main bolt and three groups of elastic bolts, wherein the driving teeth are meshed with the meshing groove, the meshing groove is formed in the inner side of the movable sleeve plate, the two groups of pushing rods are respectively and fixedly connected to the left side and the right side of the movable sleeve plate, the main bolt is fixedly connected with one side of the pushing rods, and the three groups of elastic bolts are respectively located at one side of the pushing rods away from the main bolt.

As a preferred implementation mode, the three groups of elastic bolts are respectively and slidably connected to the surface of the handle plate, and the three groups of elastic bolts are distributed in an equidistant straight line manner, and the driving teeth are fixedly connected to the middle position of the back end of the shifting plate.

As a preferred implementation mode, the movable sleeve plate is connected to the inside of the handle plate in a sliding mode, through holes are formed in the surface of the handle plate at positions close to the main bolt, and bolt sleeves are fixedly connected to the positions of the door cabinet body close to the main bolt and the elastic bolt respectively.

As a preferred implementation mode, locking mechanism includes motor, threaded rod, axle sleeve, two sets of transmission blocks, two sets of support frames, locking slider and four sets of limit spouts, the output shaft fixed connection of threaded rod and motor, the axle sleeve cup joints in the intermediate position of threaded rod, two sets of transmission blocks respectively threaded connection in the upper and lower both ends of threaded rod, two sets of the support frames pass through the pinhole swing joint respectively in the left and right sides of transmission block, the one end that the transmission block was kept away from to the support frame passes through swing joint between pinhole and the locking slider, locking slider sliding connection is in the inboard of limit spout.

As a preferred implementation mode, the motor is fixedly connected to the back surface of the shifting plate, the motor is electrically connected with the control plate, and the four groups of limiting sliding grooves are respectively and fixedly connected to the upper end and the lower end of the back surface of the shifting plate.

As a preferred embodiment, the directions of the threaded connection between the two groups of transmission blocks and the threaded rod are opposite, and the threaded rod is movably connected with the shifting plate through the shaft sleeve.

As a preferred implementation mode, the limiting mechanism comprises a T-shaped lock pin, a wedge notch, an inclined push rod, a slide rod, a spring and a clamping groove, wherein one end of the T-shaped lock pin is mutually abutted against the clamping groove, the wedge notch is formed in the middle of the T-shaped lock pin, the inclined push rod penetrates through the wedge notch, the slide rod is fixedly connected to one side of the inclined push rod, and the spring is sleeved on the surface of the slide rod.

As a preferred implementation mode, the bottom of the inclined push rod and the inner side of the wedge notch are wedge-shaped, one end of the sliding rod is movably connected with the handle plate through a limiting pin, the inclined push rod is elastically connected with the handle plate through a spring, the clamping groove is wavy, and the clamping groove is formed in the middle position of the back of the pulling plate.

Compared with the prior art, the invention has the advantages and positive effects that:

1. according to the invention, when the pulling plate on the surface of the handle plate is pushed inwards by the separating mechanism, the driving teeth in the separating mechanism can be driven to rotate, the driving teeth are meshed with the meshing grooves on the inner side of the movable sleeve plate, so that the movable sleeve plate can move, in the process that the movable sleeve plate moves to one side, the pushing rods at the two ends can be in contact with or separated from the elastic bolts, the elastic bolts stretch out and draw back under the elastic action, the butt joint between door cabinet bodies is realized, meanwhile, the main bolts are fixed on one side of the pushing rods, and can be completely inserted into the door cabinet bodies to realize the connection with a single group of door cabinet bodies, so that the connection and the separation between the two groups of door cabinet bodies can be realized respectively only by controlling different rotation directions of the pulling plate, the door cabinet is convenient to detach, and the door cabinet is simultaneously applicable to the connection and the pulling of two groups of door cabinet bodies.

2. According to the invention, when the locking operation is needed, the shifting plate can be shifted to be flush with the handle plate, then the control board can control the motor in the locking mechanism, the motor drives the threaded rod to rotate, two groups of transmission blocks on the surface of the threaded rod can oppositely drive, the locking sliding block can be pushed to slide in the limiting sliding groove under the action of the supporting frame until one end of the locking sliding block is in butt joint with the handle plate, at the moment, the shifting plate is shifted, and the back of the shifting plate is locked by the locking sliding blocks at the two ends and cannot be shifted, so that a certain locking effect is provided, and the anti-theft performance is effectively improved.

3. According to the invention, through the limiting mechanism, when the poking plate is poked, the clamping groove on the back surface of the poking plate is driven to rotate along with the poking plate, the clamping groove is clamped with the T-shaped lock pin, the T-shaped lock pin can be driven to move while rotating, the wedge notch is formed in the surface of the T-shaped lock pin, the inclined push rod on the inner side of the wedge notch can be stressed to transversely move, and the reset of the inclined push rod is realized under the elastic force of the surface spring of the slide rod on one side, so that the T-shaped lock pin can be clamped with the clamping groove in a reciprocating manner, the condition that the finger is clamped due to the stressed movement of the poking plate and the handle plate in the finger retracting process is prevented, and the safety is effectively improved.

Drawings

FIG. 1 is a schematic overall structure outline of an aluminum alloy integrated separation handle mounting structure provided by the invention.

Fig. 2 is a schematic diagram of the bottom end of a half-section structure of a handle plate of an aluminum alloy integrated separation handle mounting structure.

Fig. 3 is a schematic plan view of a handle plate of an aluminum alloy integrated separation handle mounting structure.

Fig. 4 is a schematic diagram showing the back structure detachment of a handle plate of an aluminum alloy integrated separation handle mounting structure.

Fig. 5 is a schematic diagram showing the connection of the back structure of a handle plate of an aluminum alloy integrated separation handle installation structure.

Fig. 6 is an enlarged schematic diagram of a point a structure at the position of fig. 3 of an aluminum alloy integrated separation handle installation structure diagram.

Fig. 7 is an enlarged schematic diagram of a B-point structure at the position of fig. 5 of an aluminum alloy integrated separation handle installation structure diagram.

Legend description:

1. a handle plate; 2. a door cabinet body; 3. a poking plate; 4. a control board; 5. a separation mechanism; 501. driving the teeth; 502. a movable sleeve plate; 503. a meshing groove; 504. pushing the rod; 505. a main bolt; 506. an elastic bolt; 6. a locking mechanism; 601. a motor; 602. a threaded rod; 603. a shaft sleeve; 604. a transmission block; 605. a support frame; 606. a locking slide block; 607. limiting sliding grooves; 7. a limiting mechanism; 701. a T-shaped locking pin; 702. wedge notch; 703. an inclined push rod; 704. a slide bar; 705. a spring; 706. a clamping groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-7, the present invention provides a technical solution: the utility model provides an integrative separation handle mounting structure of aluminum alloy, including handle board 1 and two sets of door cabinet body 2, two sets of door cabinet body 2 are located the left and right sides of handle board 1 respectively, the front end swing joint of handle board 1 has dials board 3, the fixed surface who dials board 3 has control panel 4, the inboard upper and lower both ends of handle board 1 are fixedly connected with separating mechanism 5 respectively, and be opposite distribution between two sets of separating mechanism 5, the back fixedly connected with locking mechanism 6 of dialling board 3, the rear end fixedly connected with stop gear 7 of handle board 1.

In this embodiment, firstly, through stirring the pulling plate 3 to the inside of pulling plate 1, pulling plate 3 can drive the release mechanism 5 operation at the inside upper and lower both ends of pulling plate 1 in the rotation process, release mechanism 5 realizes the separation or butt joint installation fixed operation between pulling plate 1 both ends and door cabinet body 2, so can effectively realize the pulling respectively between two sets of door cabinet body 2, reduce the use quantity of handle, and the separation of convenient to detach, and pulling plate 3 is in the rotation process drive locking mechanism 6 operation, locking mechanism 6 can effectually block pulling plate 3 at certain angle, prevent the in-process of withdrawal finger, pulling plate 3 presss from both sides to the finger with pulling plate 1, improve the safety in utilization, when need carrying out the locking operation at last, only need control the stop gear 7 at pulling plate 3 back through pulling plate 3 positive control plate 4, stop gear 7 can effectively realize pulling plate 3 and pulling plate 1 between the door cabinet body 2 at will, thereby prevent unlocking between pulling plate 1 and the door cabinet body 2, effectively improve the theftproof nature.

As shown in fig. 3 and 6, the separating mechanism 5 includes a driving tooth 501, a movable sleeve plate 502, a meshing groove 503, two groups of pushing rods 504, a main bolt 505 and three groups of elastic bolts 506, the driving tooth 501 and the meshing groove 503 are meshed with each other, the meshing groove 503 is formed in the inner side of the movable sleeve plate 502, the two groups of pushing rods 504 are respectively and fixedly connected to the left side and the right side of the movable sleeve plate 502, the main bolt 505 is fixedly connected with one side of the pushing rods 504, and the three groups of elastic bolts 506 are respectively located on one side of the pushing rods 504 away from the main bolt 505. The three groups of elastic bolts 506 are respectively and slidably connected to the surface of the handle plate 1, and the three groups of elastic bolts 506 are distributed in equidistant straight lines, so that the driving teeth 501 are fixedly connected to the middle position of the back end of the pulling plate 3. The movable sleeve plate 502 is slidably connected to the inside of the handle plate 1, a through hole is formed in a position, close to the main bolt 505, of the surface of the handle plate 1, and bolt sleeves are fixedly connected to positions, close to the main bolt 505 and the elastic bolt 506, of the door cabinet body 2 respectively.

In this embodiment, when the pulling plate 3 is pulled toward the inner side of the handle plate 1, the pulling plate 3 is forced to rotate to drive the driving teeth 501 in the separating mechanism 5 to rotate, the driving teeth 501 are meshed with the meshing grooves 503 on the inner side of the movable sleeve plate 502, so as to realize movement of the movable sleeve plate 502, the pushing rods 504 on two ends of the movable sleeve plate 502 can respectively realize abutting and separating with the elastic pins 506, and when the elastic pins 506 abut against the pushing rods 504, the outer ends of the elastic pins 506 can completely submerge in the door cabinet 2, otherwise, the outer ends of the elastic pins 506 are separated, and meanwhile, the pushing rods 504 drive the main pins 505 to be inserted between the door cabinet 2, so that the door cabinet 2 on two sides of the handle plate 1 can be separated or connected with the handle plate 1 respectively, thereby realizing control of two groups of door cabinets 2 by the handle plate 1, reducing the number of the handle plate 1, and the handle plate 1 can realize insertion and fixing between the door cabinets 2 through the separating mechanism 5, so as to facilitate disassembly and maintenance operations of the handle plate 1.

As shown in fig. 3 and 4, the locking mechanism 6 includes a motor 601, a threaded rod 602, a shaft sleeve 603, two sets of transmission blocks 604, two sets of support frames 605, a locking slide block 606 and four sets of limiting slide grooves 607, the threaded rod 602 is fixedly connected with an output shaft of the motor 601, the shaft sleeve 603 is sleeved at the middle position of the threaded rod 602, the two sets of transmission blocks 604 are respectively connected with the upper end and the lower end of the threaded rod 602 in a threaded manner, the two sets of support frames 605 are respectively movably connected with the left side and the right side of the transmission blocks 604 through pin holes, one end, far away from the transmission blocks 604, of the support frames 605 is movably connected with the locking slide blocks 606 through pin holes, and the locking slide blocks 606 are slidably connected with the inner sides of the limiting slide grooves 607. The motor 601 is fixedly connected to the back surface of the dial plate 3, and the motor 601 is electrically connected to the control board 4, and the four sets of limiting sliding grooves 607 are respectively fixedly connected to the upper and lower ends of the back surface of the dial plate 3. The directions of the threaded connection between the two groups of transmission blocks 604 and the threaded rod 602 are opposite, and the threaded rod 602 is movably connected with the shifting plate 3 through a shaft sleeve 603.

In this embodiment, when the door cabinet 2 needs to be locked, only the control board 4 on the surface of the pulling plate 3 is used to control the driving of the motor 601 in the locking mechanism 6, the motor 601 can drive the threaded rod 602 to rotate, the threaded rod 602 can stably rotate on the back of the pulling plate 3 through the shaft sleeve 603, the two groups of transmission blocks 604 on the surface of the threaded rod can move oppositely, the supporting frame 605 is driven to perform pushing operation, one end of the supporting frame 605 is movably connected with the locking slide block 606, the locking slide block 606 slides in the limiting sliding groove 607 until one end of the locking slide block 606 is in butt joint with the pulling plate 1, at this time, the pulling plate 3 is pushed again, the pulling plate 3 is prevented from being pushed by the interference between the locking slide block 606 and the pulling plate 1, and thus the locking operation between the pulling plate 1 and the door cabinet 2 can be realized by matching the separating mechanism 5, and the anti-theft effect is improved.

As shown in fig. 3, 5 and 7, the limiting mechanism 7 comprises a T-shaped lock pin 701, a wedge notch 702, an inclined push rod 703, a slide rod 704, a spring 705 and a clamping groove 706, wherein one end of the T-shaped lock pin 701 and the clamping groove 706 are mutually abutted, the wedge notch 702 is formed in the middle position of the T-shaped lock pin 701, the inclined push rod 703 penetrates through the wedge notch 702, the slide rod 704 is fixedly connected to one side of the inclined push rod 703, and the spring 705 is sleeved on the surface of the slide rod 704. The bottom of inclined push rod 703 and the inside of wedge notch 702 are wedge form, and swing joint is passed through between spacer pin and the handle board 1 to the one end of slide rod 704, and elastic connection is passed through between spring 705 and the handle board 1 to inclined push rod 703, and draw-in groove 706 is wavy, and draw-in groove 706 opens the intermediate position at the plectrum 3 back.

In this embodiment, when the dial plate 3 is shifted, the clamping groove 706 in the back limiting mechanism 7 of the dial plate 3 also rotates along with the dial plate, the clamping groove 706 is clamped with the T-shaped lock pin 701, so that the T-shaped lock pin 701 can move under the rotation interference force, the wedge notch 702 is formed in the surface of the T-shaped lock pin 701, the wedge notch 702 can interfere with the inclined push rod 703, so that the force transmission direction is converted into the transverse movement effect of the inclined push rod 703, at the moment, one end of the inclined push rod 703 realizes elastic reset through the slide rod 704 and the spring 705, so that the T-shaped lock pin 701 is clamped with the clamping groove 706 at different positions, thereby realizing stability, and thus, the hand plate 1 and the dial plate 3 can be effectively prevented from being clamped to the finger in the inner side of the hand plate 1, and the use safety is improved.

Working principle: by pushing the pulling plate 3 towards the inner side of the pulling plate 1, the pulling plate 3 drives the driving teeth 501 in the separating mechanism 5 to rotate in the rotating process, the driving teeth 501 are meshed with the meshing grooves 503 on the inner side of the movable sleeve plate 502, so that the movable sleeve plate 502 is forced to move, the abutting joint or separation between the pushing rod 504 and the elastic bolt 506 is realized, the elastic bolt 506 moves after abutting joint with the pushing rod 504, the pulling plate is inserted between the door cabinet 2, the pushing rod 504 drives the main bolt 505 to be inserted and fixed between the door cabinet 2, the abutting joint fixing effect between the pulling plate 1 and the door cabinet 2 is realized, the separating effect between the pulling plate 1 and the door cabinet 2 is realized on the other side, thus the single group of pulling plate 1 can control the pulling between the two groups of door cabinets 2, the pulling plate 1 is convenient to detach, the pulling plate 3 can drive the clamping groove 706 in the limiting mechanism 7 to rotate during pulling, the clamping groove 706 is clamped with the T-shaped lock pin 701, under the stress state, the T-shaped lock pin 701 moves, the wedge notch 702 on the surface of the T-shaped lock pin 701 is stressed between the wedge notch 702 and the inclined push rod 703, the inclined push rod 703 can realize elastic contact with the handle plate 1 under the action of the spring 705 on the surface of the slide rod 704, so that the clamping between the T-shaped lock pin 701 and the clamping groove 706 is realized, the poking plate 3 can be fixed after rotating for a certain angle, fingers are prevented from being clamped in the finger recovery process, the safety is improved, and finally, when the locking operation is needed, only the control plate 4 on the front surface of the poking plate 3 is required to be controlled, the control plate 4 can control the motor 601 in the locking mechanism 6 to drive, the two groups of transmission blocks 604 on the surface of the threaded rod 602 can drive the threaded rod 602 to move oppositely under the stability of the shaft sleeve 603, the pushing of the support frame 605 is realized, one end of the support frame 605 drives the locking slide block 606 to slide in the limiting slide groove 607, until the locking slide block 606 abuts against the inner side of the handle plate 1, the pulling plate 3 is limited and cannot rotate, so that the locking effect between the handle plate 1 and the door cabinet 2 is improved.

The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an integrative separation handle mounting structure of aluminum alloy, includes handle board (1) and two sets of door cabinet body (2), its characterized in that: two sets of the door cabinet body (2) are located the left and right sides of handle board (1) respectively, the front end swing joint of handle board (1) has dials board (3), the fixed surface of dialling board (3) is connected with control panel (4), the inboard upper and lower both ends of handle board (1) are separating mechanism (5) fixedly connected with respectively, and are opposite distribution between two sets of separating mechanism (5), the back fixedly connected with locking mechanism (6) of dialling board (3), the rear end fixedly connected with stop gear (7) of handle board (1).

2. The aluminum alloy integrated separation handle mounting structure according to claim 1, wherein: the separating mechanism (5) comprises driving teeth (501), a movable sleeve plate (502), a meshing groove (503), two groups of pushing rods (504), a main bolt (505) and three groups of elastic bolts (506), wherein the driving teeth (501) are meshed with the meshing groove (503), the meshing groove (503) is formed in the inner side of the movable sleeve plate (502), the pushing rods (504) are respectively and fixedly connected to the left side and the right side of the movable sleeve plate (502), the main bolt (505) is fixedly connected with one side of the pushing rods (504), and the elastic bolts (506) are respectively located on one sides of the pushing rods (504) away from the main bolt (505).

3. The aluminum alloy integrated separation handle mounting structure according to claim 2, wherein: the three groups of elastic bolts (506) are respectively connected to the surface of the handle plate (1) in a sliding mode, the three groups of elastic bolts (506) are distributed in an equidistant straight line mode, and the driving teeth (501) are fixedly connected to the middle position of the back end of the shifting plate (3).

4. An aluminum alloy integrated release handle mounting structure according to claim 3, wherein: the movable sleeve plate (502) is slidably connected to the inside of the handle plate (1), a through hole is formed in the surface of the handle plate (1) close to the main bolt (505), and bolt sleeves are fixedly connected to the positions of the door cabinet body (2) close to the main bolt (505) and the elastic bolts (506) respectively.

5. The aluminum alloy integrated separation handle mounting structure according to claim 1, wherein: locking mechanism (6) are including motor (601), threaded rod (602), axle sleeve (603), two sets of driving blocks (604), two sets of support frames (605), locking slider (606) and four sets of limit sliding groove (607), the output shaft fixed connection of threaded rod (602) and motor (601), axle sleeve (603) cup joint in the intermediate position of threaded rod (602), two sets of driving blocks (604) threaded connection respectively in the upper and lower both ends of threaded rod (602), two sets of support frames (605) pass through the pinhole swing joint respectively in the left and right sides of driving blocks (604), swing joint between one end that driving blocks (604) were kept away from to support frames (605) is passed through pinhole and locking slider (606), locking slider (606) sliding connection is in the inboard of limit sliding groove (607).

6. The aluminum alloy integrated separation handle mounting structure according to claim 5, wherein: the motor (601) is fixedly connected to the back of the poking plate (3), the motor (601) is electrically connected with the control board (4), and the four groups of limiting sliding grooves (607) are respectively and fixedly connected to the upper end and the lower end of the back of the poking plate (3).

7. The aluminum alloy integrated separation handle mounting structure according to claim 6, wherein: the directions of threaded connection between the two groups of transmission blocks (604) and the threaded rod (602) are opposite, and the threaded rod (602) is movably connected with the shifting plate (3) through a shaft sleeve (603).

8. The aluminum alloy integrated separation handle mounting structure according to claim 1, wherein: stop gear (7) are including T shape lockpin (701), wedge notch (702), inclined push rod (703), slide bar (704), spring (705) and draw-in groove (706), contradict each other between the one end of T shape lockpin (701) and draw-in groove (706), wedge notch (702) are seted up in the intermediate position of T shape lockpin (701), inclined push rod (703) run through wedge notch (702), slide bar (704) fixed connection is in one side of inclined push rod (703), spring (705) cup joint in the surface of slide bar (704).

9. The aluminum alloy integrated separation handle mounting structure according to claim 8, wherein: the bottom of inclined push rod (703) and the inboard of wedge notch (702) are wedge form, swing joint between locating pin and handle board (1) is passed through to the one end of slide rod (704), and elastic connection between inclined push rod (703) and handle board (1) is passed through spring (705), draw-in groove (706) are the wave form, draw-in groove (706) are seted up in the intermediate position at the plectrum (3) back.