CN214029172U

CN214029172U - Unmanned aerial vehicle landing navigation head

Info

Publication number: CN214029172U
Application number: CN202023009785.9U
Authority: CN
Inventors: 刘鸿男
Original assignee: Henan Tongchen Electronic Technology Co ltd
Current assignee: Henan Tongchen Electronic Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-24
Anticipated expiration: 2030-12-15

Abstract

The utility model provides an unmanned aerial vehicle landing navigation device, which comprises a mounting seat, wherein a base is arranged inside the mounting seat, the upper surface of the base is fixedly connected with a navigation device body, the inner bottom wall of the mounting seat is fixedly connected with first pressure springs which are arranged at equal intervals, a first rubber air bag is arranged inside the mounting seat, the top end of each first pressure spring is fixedly connected with the bottom surface of the first rubber air bag, the upper surface of the first rubber air bag is contacted with the bottom surface of the base, two symmetrical second rubber air bags are fixedly connected with the inner side wall of the mounting seat, the base is contacted with the second rubber air bags, a rubber pad is fixedly connected with the inner wall of the mounting seat, the back surface of the base is contacted with the front surface of the rubber pad, the back surface of the base is provided with a clamping mechanism, and the unmanned aerial vehicle landing navigation device can be free from other auxiliary tools, can be more convenient install the mount pad, and the mount pad has buffering effect.

Description

Unmanned aerial vehicle landing navigation head

Technical Field

The utility model relates to an unmanned aerial vehicle navigation, concretely relates to unmanned aerial vehicle landing navigation head.

Background

The navigator is that unmanned aerial vehicle independently lands as an important component in the key technology of autonomic control, and it is the prerequisite that realizes unmanned aerial vehicle's recovery and used repeatedly, uses the most extensively radio navigation appearance on the unmanned aerial vehicle at present, and the radio navigation appearance adopts radio navigation technology, makes a whole set of radio electronic equipment of moving object safety navigation.

Unmanned aerial vehicle navigation head utilizes bolt assembly fixed connection inside the unmanned aerial vehicle organism usually, need use other appurtenance to cooperate, the installation is comparatively loaded down with trivial details, consequently, has brought certain inconvenience for the staff, and general unmanned aerial vehicle navigation head is not provided with buffer usually, so unmanned aerial vehicle rocking that produces when landing can lead to navigation head's part to take place not hard up, and then navigation head takes place to damage easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an unmanned aerial vehicle landing navigation head aims at solving the problem that unmanned aerial vehicle landing navigation head is not convenient for the dismouting among the prior art.

In order to achieve the above object, the utility model discloses the technical scheme that unmanned aerial vehicle landing navigation head adopted is: comprises a mounting seat, a base is arranged in the mounting seat, the upper surface of the base is fixedly connected with a navigation device body, the inner bottom wall of the mounting seat is fixedly connected with first pressure springs which are arranged at equal intervals, the inside of the mounting seat is provided with first rubber air bags, the top end of each first pressure spring is fixedly connected with the bottom surface of each first rubber air bag, the upper surface of the first rubber air bag is contacted with the bottom surface of the base, the inner side wall of the mounting seat is fixedly connected with two symmetrical second rubber air bags, the base is contacted with the second rubber air bag, the inner wall of the mounting seat is fixedly connected with a rubber pad, the back surface of the base is contacted with the front surface of the rubber pad, the back surface of the base is provided with a clamping mechanism, four edges of the upper surface of the mounting seat are provided with limiting mechanisms, and the front surface of the navigation device body is provided with a fixing mechanism.

Preferably, the clamping mechanism includes a clamping frame and a clamping groove, the outer surface of the clamping frame is fixedly connected with the inner wall of the mounting seat, the clamping groove is formed in the back face of the base and matched with the clamping frame, the clamping frame is located inside the clamping groove, two symmetrical hemispherical grooves are formed in the inner side wall of the clamping groove, two symmetrical second pressure springs are fixedly connected with the inner side wall of the clamping frame, two symmetrical sliding plates are slidably connected with the inner wall of the clamping frame, two ends, far away from each other, of the second pressure springs are respectively fixedly connected with the outer surfaces of the two sliding plates, two connecting blocks are fixedly connected with one side face, far away from each other, of the sliding plates, universal beads are embedded into one side face, far away from each other, of the connecting blocks, and the universal beads penetrate through the clamping frame and extend into the hemispherical grooves.

Preferably, the inner bottom wall and the inner top wall of the clamping frame are both provided with limiting sliding chutes, and the sliding plate is in sliding connection with the limiting sliding chutes.

Preferably, stop gear includes slot, mounting groove and spacing groove, the upper surface at the mount pad is seted up to slot and mounting groove, the upper surface at the base is seted up to the spacing groove, the interior diapire fixedly connected with extension spring of mounting groove, the inner wall sliding connection of mounting groove has the fixed plate, the top of extension spring and the bottom surface fixed connection of fixed plate, the upper surface of fixed plate rotates through the bearing and is connected with the pull rod, the top of pull rod extends to the outside of mount pad, the top fixedly connected with connecting plate of pull rod, the bottom surface fixedly connected with gag lever post of connecting plate, the bottom of gag lever post extends to the spacing inslot, and gag lever post and spacing groove sliding connection, gag lever post and slot looks adaptation, the last fixed surface of connecting plate is connected with the arm-tie.

Preferably, the fixing mechanism comprises a fixing block, a vertical plate and a fixing frame, the bottom surface of the fixing block is fixedly connected with the upper surface of the base, the bottom surface of the vertical plate is fixedly connected with the upper surface of the mounting seat, the outer surface of the fixing frame is embedded in the vertical plate, a side surface, close to the vertical plate, of the fixing block is provided with a groove, the groove is internally and slidably connected with a fixing rod, the groove is inserted with the fixing rod, one end, close to the fixing frame, of the fixing rod penetrates through the fixing frame and extends into the fixing frame, the fixing rod is slidably connected with the fixing frame, the inner wall of the fixing frame is slidably connected with a movable plate, the back surface of the movable plate is fixedly connected with one end of the fixing rod, four corners of the front surface of the movable plate are fixedly connected with third pressure springs, and one end, far away from the third pressure spring, of each third pressure spring is fixedly connected with the inner wall of the movable plate, lead to the groove has been seted up in the front of fixed frame, the front of movable plate is rotated through the bearing and is connected with the connecting rod, the one end that the movable plate was kept away from to the connecting rod runs through logical groove and extends to the outside of fixed frame, and connecting rod and logical groove sliding connection, the external fixed surface of connecting rod is connected with the limiting plate, and limiting plate and logical groove looks adaptation.

The utility model has the advantages that: the utility model discloses a setting of latch mechanism, namely the setting of card frame, second pressure spring, sliding plate, connecting block, draw-in groove, hemisphere groove and universal pearl, at first place the base in the mount pad, and make the base contact with first rubber gasbag, then promote the navigation unit body, make the card frame can insert to the draw-in groove, can extrude two universal pearls when the card frame inserts to the draw-in groove, make universal pearl can be pushed to the mount pad, after the position that the universal pearl reachs the hemisphere groove, utilize the elasticity of second pressure spring to push out the universal pearl, make universal pearl and hemisphere groove phase joint, can accomplish the joint effect to the base, so as to fix the base, then through the setting of stop gear, namely the setting of slot, mounting groove, spacing groove, the gag lever post, the fixed plate, the extension spring, the connecting plate, the setting of pull rod and arm-tie plate, will stimulate the arm-tie, make the gag lever post take out from the slot, and the connecting plate is rotated to insert the limiting rod into the limiting groove, so that the limiting rod has a limiting and fixing effect on the base under the action of the elastic force of the tension spring, the base is prevented from falling off, then the connecting rod is pulled through the arrangement of the fixing mechanism, namely the arrangement of the movable plate, the fixed block, the groove, the fixed rod, the vertical plate, the fixed frame, the connecting rod, the through groove, the third pressure spring and the limiting plate, so that the limiting plate can enter the fixed frame through the through groove, the movable plate is pushed to move under the action of the elastic force of the third pressure spring, the fixed rod is inserted into the groove, and the mounting seat is fixed, so that the mounting seat is more convenient to mount, other auxiliary tools are not needed, the working efficiency of workers is improved, and after the base is fixedly mounted in the mounting seat through the matching arrangement of the first rubber air bag, the first pressure spring, the rubber pad and the second rubber air bag, can utilize the elasticity effect of first pressure spring, play the buffering effect to the mount pad, when the mount pad takes place to rock, can make first rubber gasbag, second rubber gasbag and rubber pad play the effect of shock attenuation buffering to the base respectively to effectually avoid the mount pad to take place acutely to rock, and then effectually play the protective effect to the part of mount pad, avoid the mount pad to take place to damage.

Furthermore, the clamping mechanism comprises a clamping frame and a clamping groove, the outer surface of the clamping frame is fixedly connected with the inner wall of the mounting seat, the clamping groove is formed in the back face of the base and is matched with the clamping groove, the clamping frame is positioned in the clamping groove, two symmetrical hemispherical grooves are formed in the inner side wall of the clamping groove, two symmetrical second pressure springs are fixedly connected to the inner side wall of the clamping frame, two symmetrical sliding plates are slidably connected to the inner wall of the clamping frame, the ends, far away from each other, of the two second pressure springs are fixedly connected with the outer surfaces of the two sliding plates respectively, a connecting block is fixedly connected to one side face, far away from each other, of the two sliding plates, universal beads are inlaid in one side face, far away from each other, of the two connecting blocks, the universal beads penetrate through the clamping frame and extend into the hemispherical grooves, and the base can be clamped more rapidly by means of matching between the above structures, so as to fix the base.

Furthermore, the inner bottom wall and the inner top wall of the clamping frame are both provided with limiting sliding grooves, the sliding plate is connected with the limiting sliding grooves in a sliding mode, and the limiting sliding grooves can be effectively arranged to play a limiting effect on the sliding plate, so that the stability of the sliding plate during sliding is guaranteed.

Furthermore, the limiting mechanism comprises a slot, a mounting groove and a limiting groove, the slot and the mounting groove are arranged on the upper surface of the mounting seat, the limiting groove is arranged on the upper surface of the base, the inner bottom wall of the mounting groove is fixedly connected with a tension spring, the inner wall of the mounting groove is connected with a fixed plate in a sliding manner, the top end of the tension spring is fixedly connected with the bottom surface of the fixed plate, the upper surface of the fixed plate is rotatably connected with a pull rod through a bearing, the top end of the pull rod extends to the outside of the mounting seat, the top end of the pull rod is fixedly connected with a connecting plate, the bottom surface of the connecting plate is fixedly connected with a limiting rod, the bottom end of the limiting rod extends into the limiting groove, the limiting rod is connected with the limiting groove in a sliding manner, the limiting rod is matched with the slot, the upper surface of the connecting plate is fixedly connected with a pull plate, and the base can be conveniently limited and fixed by utilizing the matching arrangement among the above structures, and the operation is simple, and any auxiliary tool is not needed.

Further, the fixing mechanism comprises a fixing block, a vertical plate and a fixing frame, the bottom surface of the fixing block is fixedly connected with the upper surface of the base, the bottom surface of the vertical plate is fixedly connected with the upper surface of the mounting seat, the outer surface of the fixing frame is embedded in the vertical plate, a groove is formed in one side surface, close to the vertical plate, of the fixing block, a fixing rod is connected in the groove in a sliding mode, the groove is inserted into the fixing rod in a plugging mode, one end, close to the fixing frame, of the fixing rod penetrates through the fixing frame and extends into the fixing frame, the fixing rod is connected with the fixing frame in a sliding mode, a moving plate is connected to the inner wall of the fixing frame in a sliding mode, the back surface of the moving plate is fixedly connected with one end of the fixing rod, third pressure springs are fixedly connected to four corners of the front surface of the moving plate, and one end, far away from the moving plate, of each third pressure spring is fixedly connected with the inner wall of the fixing frame, lead to the groove has been seted up in the front of fixed frame, the front of movable plate is rotated through the bearing and is connected with the connecting rod, the one end that the movable plate was kept away from to the connecting rod runs through logical groove and extends to the outside of fixed frame, and connecting rod and logical groove sliding connection, the outer fixed surface of connecting rod is connected with the limiting plate, and limiting plate and logical groove looks adaptation, and the cooperation setting between the structure more than utilizing, can be quick play fixed effect to the mount pad, operate more simply.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the landing navigation device for an unmanned aerial vehicle according to the present invention;

fig. 2 is a schematic side sectional view of an embodiment of the landing guidance device of the unmanned aerial vehicle according to the present invention;

fig. 3 is a schematic rear sectional view of an embodiment of the landing guidance device for an unmanned aerial vehicle according to the present invention;

fig. 4 is an enlarged schematic view of a structure at a position a in fig. 3 of a specific embodiment of the landing navigation device for the unmanned aerial vehicle according to the present invention;

fig. 5 is an enlarged schematic view of a structure at B in fig. 3 of an embodiment of the landing guidance device for an unmanned aerial vehicle according to the present invention;

fig. 6 is an enlarged schematic view of the structure at C in fig. 2 of a specific embodiment of the landing navigation device for unmanned aerial vehicle of the present invention.

In the figure: 1. a mounting seat; 2. a base; 3. a navigation device body; 4. a limiting mechanism; 41. a slot; 42. mounting grooves; 43. a limiting groove; 44. a limiting rod; 45. a fixing plate; 46. a tension spring; 47. a connecting plate; 48. a pull rod; 49. pulling a plate; 5. a fixing mechanism; 50. moving the plate; 51. a fixed block; 52. grooving; 53. fixing the rod; 54. a vertical plate; 55. a fixing frame; 56. a connecting rod; 57. a through groove; 58. a third pressure spring; 59. a limiting plate; 6. a second rubber air bag; 7. a clamping mechanism; 71. clamping a frame; 72. a second pressure spring; 73. a sliding plate; 74. connecting blocks; 75. a card slot; 76. a hemispherical groove; 77. a universal bead; 8. a first rubber air bag; 9. a first pressure spring; 10. and (7) a rubber pad.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

The utility model relates to a specific embodiment of an unmanned aerial vehicle landing navigation device, as shown in figures 1 to 6, which comprises a mounting seat 1, a base 2 is arranged in the mounting seat 1, a navigation device body 3 is fixedly connected to the upper surface of the base 2, first pressure springs 9 are fixedly connected to the inner bottom wall of the mounting seat 1 and are arranged equidistantly, first rubber airbags 8 are arranged in the mounting seat 1, the top end of each first pressure spring 9 is fixedly connected with the bottom surface of the first rubber airbag 8, the upper surface of the first rubber airbag 8 is contacted with the bottom surface of the base 2, two symmetrical second rubber airbags 6 are fixedly connected to the inner side wall of the mounting seat 1, the base 2 is contacted with the second rubber airbags 6, a rubber pad 10 is fixedly connected to the inner wall of the mounting seat 1, the back surface of the base 2 is contacted with the front surface of the rubber pad 10, a clamping mechanism 7 is arranged on the back surface of the base 2, four corners of the upper surface of the mounting seat 1 are respectively provided with a limiting mechanism 4, the front surface of the navigation device body 3 is provided with a fixing mechanism 5, the base 2 is firstly placed in the mounting seat 1 through the setting of a clamping mechanism 7, the base 2 is contacted with the first rubber air bag 8, then the navigation device body 3 is pushed, the clamping frame 71 can be inserted into the clamping groove 75, the clamping frame 71 can extrude two universal beads 77 when being inserted into the clamping groove 75, the universal beads 77 can be pushed into the mounting seat 1, the universal beads 77 are pushed out by the elasticity of the second pressure spring 72 until the universal beads 77 reach the position of the hemispherical groove 76, the universal beads 77 are clamped with the hemispherical groove 76, the clamping effect on the base 2 can be completed, so as to fix the base 2, then through the setting of the limiting mechanism 4, the pulling plate 49 is pulled, the limiting rod 44 is pulled out from the slot 41, and rotating the connecting plate 47, insert the gag lever post 44 to the spacing groove 43, can utilize under the elastic force of extension spring 46, make the gag lever post 44 play spacing fixed effect to base 2, avoid the base 2 to take place to drop, and through the setting of fixed establishment 5, stimulate connecting rod 56, make limiting plate 59 can enter into fixed frame 55 through leading to the groove 57, and utilize under the elastic force of third pressure spring 58, promote movable plate 50 to remove, and then insert dead lever 53 to the fluting 52 in, fix mount pad 1, thus the installation to mount pad 1 is more convenient, need not to use other appurtenance, has improved staff's work efficiency, after installing base 2 in mount pad 1 fixedly, can utilize the elastic force effect of first pressure spring 9, play the cushioning effect to mount pad 1, when mount pad 1 rocks, can make first rubber gasbag 8, Second rubber air bag 6 and rubber pad 10 have played the effect of shock attenuation buffering to base 2 respectively to effectual mount pad 1 of avoiding takes place violent rocking, and then effectual part to mount pad 1 has played the safeguard effect, avoids mount pad 1 to take place to damage.

In this embodiment, the clamping mechanism 7 includes a clamping frame 71 and a clamping groove 75, an outer surface of the clamping frame 71 is fixedly connected with an inner wall of the mounting base 1, the clamping groove 75 is disposed on a back surface of the base 2, the clamping frame 71 is adapted to the clamping groove 75, the clamping frame 71 is located inside the clamping groove 75, two symmetrical hemispherical grooves 76 are disposed on an inner side wall of the clamping groove 75, two symmetrical second pressure springs 72 are fixedly connected to an inner side wall of the clamping frame 71, two symmetrical sliding plates 73 are slidably connected to an inner wall of the clamping frame 71, ends of the two second pressure springs 72 far away from each other are respectively fixedly connected to outer surfaces of the two sliding plates 73, a side surface of the two sliding plates 73 far away from each other is fixedly connected to a connecting block 74, a side surface of the two connecting blocks 74 far away from each other is inlaid with a universal ball 77, and the universal ball 77 penetrates through the clamping frame 71 and extends into the hemispherical grooves 76, by using cooperation arrangement between the above structures, can be faster carry out the joint to base 2 to fix base 2.

In this embodiment, the spacing spout has all been seted up to the interior diapire and the interior roof of card frame 71, and sliding plate 73 and spacing spout sliding connection, through the setting of spacing spout, can effectually play spacing effect to sliding plate 73, and then has guaranteed the stability of sliding plate 73 when sliding.

In this embodiment, the limiting mechanism 4 includes a slot 41, a mounting groove 42 and a limiting groove 43, the slot 41 and the mounting groove 42 are disposed on the upper surface of the mounting base 1, the limiting groove 43 is disposed on the upper surface of the base 2, an extension spring 46 is fixedly connected to the inner bottom wall of the mounting groove 42, a fixing plate 45 is slidably connected to the inner wall of the mounting groove 42, the top end of the extension spring 46 is fixedly connected to the bottom surface of the fixing plate 45, the upper surface of the fixing plate 45 is rotatably connected to a pull rod 48 through a bearing, the top end of the pull rod 48 extends to the outside of the mounting base 1, a connecting plate 47 is fixedly connected to the top end of the pull rod 48, a limiting rod 44 is fixedly connected to the bottom surface of the connecting plate 47, the bottom end of the limiting rod 44 extends into the limiting groove 43, the limiting rod 44 is slidably connected to the limiting groove 43, the limiting rod 44 is adapted to the slot 41, a pull plate 49 is fixedly connected to the upper surface of the connecting plate 47, and the above structures are cooperatively disposed, can be convenient for carry on spacing fixedly to base 2, and easy operation need not to use any appurtenance.

In this embodiment, the fixing mechanism 5 includes a fixing block 51, a vertical plate 54 and a fixing frame 55, a bottom surface of the fixing block 51 is fixedly connected to an upper surface of the base 2, a bottom surface of the vertical plate 54 is fixedly connected to an upper surface of the mounting base 1, an outer surface of the fixing frame 55 is embedded in the vertical plate 54, a side surface of the fixing block 51 close to the vertical plate 54 is provided with a slot 52, the inside of the slot 52 is slidably connected to a fixing rod 53, the slot 52 is inserted to the fixing rod 53, one end of the fixing rod 53 close to the fixing frame 55 penetrates through the fixing frame 55 and extends into the fixing frame 55, the fixing rod 53 is slidably connected to the fixing frame 55, an inner wall of the fixing frame 55 is slidably connected to a moving plate 50, a back surface of the moving plate 50 is fixedly connected to one end of the fixing rod 53, four corners of a front surface of the moving plate 50 are fixedly connected to third pressure springs 58, one end of each third pressure spring 58 far from the moving plate 50 is fixedly connected to an inner wall of the fixing frame 55, lead to groove 57 has been seted up in the front of fixed frame 55, the front of movable plate 50 is connected with connecting rod 56 through the bearing rotation, connecting rod 56 is kept away from the one end of movable plate 50 and is run through lead to groove 57 and extend to the outside of fixed frame 55, and connecting rod 56 and lead to groove 57 sliding connection, the outer fixed surface of connecting rod 56 is connected with limiting plate 59, and limiting plate 59 and lead to groove 57 looks adaptation, the cooperation setting between the structure more than the utilization, can be faster play fixed effect to mount pad 1, the operation is simpler.

Claims

1. The utility model provides an unmanned aerial vehicle landing navigation head, includes mount pad (1), its characterized in that: the inner wall of the installation seat (1) is fixedly connected with a rubber pad (10), the back of the base (2) is contacted with the front of the rubber pad (10), the back of base (2) is equipped with clamping mechanism (7), four edges of mount pad (1) upper surface all are equipped with stop gear (4), the front of navigation head body (3) is equipped with fixed establishment (5).

2. The unmanned aerial vehicle landing navigation device of claim 1, wherein: the clamping mechanism (7) comprises a clamping frame (71) and a clamping groove (75), the outer surface of the clamping frame (71) is fixedly connected with the inner wall of the mounting seat (1), the clamping groove (75) is arranged on the back of the base (2), the clamping frame (71) is matched with the clamping groove (75), the clamping frame (71) is located inside the clamping groove (75), two symmetrical hemispherical grooves (76) are formed in the inner side wall of the clamping groove (75), two symmetrical second compression springs (72) are fixedly connected to the inner side wall of the clamping frame (71), two symmetrical sliding plates (73) are slidably connected to the inner wall of the clamping frame (71), one ends, far away from each other, of the two second compression springs (72) are fixedly connected with the outer surfaces of the two sliding plates (73), one side, far away from each other, of the two sliding plates (73) is fixedly connected with a connecting block (74), and universal beads (77) are embedded in one side, far away from each other, of the two connecting blocks (74), and the universal ball (77) penetrates through the clamping frame (71) and extends into the hemispherical groove (76).

3. The unmanned aerial vehicle landing navigation device of claim 2, wherein: the inner bottom wall and the inner top wall of the clamping frame (71) are both provided with limiting sliding grooves, and the sliding plate (73) is in sliding connection with the limiting sliding grooves.

4. The unmanned aerial vehicle landing navigation device of claim 1, wherein: the limiting mechanism (4) comprises a slot (41), a mounting groove (42) and a limiting groove (43), the slot (41) and the mounting groove (42) are arranged on the upper surface of the mounting seat (1), the limiting groove (43) is arranged on the upper surface of the base (2), an inner bottom wall of the mounting groove (42) is fixedly connected with a tension spring (46), an inner wall of the mounting groove (42) is slidably connected with a fixing plate (45), the top end of the tension spring (46) is fixedly connected with the bottom surface of the fixing plate (45), the upper surface of the fixing plate (45) is rotatably connected with a pull rod (48) through a bearing, the top end of the pull rod (48) extends to the outside of the mounting seat (1), the top end of the pull rod (48) is fixedly connected with a connecting plate (47), the bottom surface of the connecting plate (47) is fixedly connected with a limiting rod (44), and the bottom end of the limiting rod (44) extends into the limiting groove (43), and gag lever post (44) and spacing groove (43) sliding connection, gag lever post (44) and slot (41) looks adaptation, the last fixed surface of connecting plate (47) is connected with arm-tie (49).

5. The unmanned aerial vehicle landing navigation device of claim 1, wherein: the fixing mechanism (5) comprises a fixing block (51), a vertical plate (54) and a fixing frame (55), the bottom surface of the fixing block (51) is fixedly connected with the upper surface of the base (2), the bottom surface of the vertical plate (54) is fixedly connected with the upper surface of the mounting seat (1), the outer surface of the fixing frame (55) is embedded in the vertical plate (54), a slot (52) is formed in one side surface, close to the vertical plate (54), of the fixing block (51), a fixing rod (53) is connected to the inside of the slot (52) in a sliding mode, the slot (52) is connected with the fixing rod (53) in a plugging mode, one end, close to the fixing frame (55), of the fixing rod (53) penetrates through the fixing frame (55) and extends to the inside of the fixing frame (55), the fixing rod (53) is connected with the fixing frame (55) in a sliding mode, and a moving plate (50) is connected to the inner wall of the fixing frame (55) in a sliding mode, the back of movable plate (50) and the one end fixed connection of dead lever (53), the equal fixedly connected with third pressure spring (58) in four positive edges of movable plate (50), every the one end that movable plate (50) were kept away from in third pressure spring (58) all with the inner wall fixed connection of fixed frame (55), logical groove (57) have been seted up in the front of fixed frame (55), the front of movable plate (50) rotates through the bearing and is connected with connecting rod (56), the one end that movable plate (50) were kept away from in connecting rod (56) runs through logical groove (57) and extends to the outside of fixed frame (55), and connecting rod (56) and logical groove (57) sliding connection, the external fixed surface fixedly connected with limiting plate (59) of connecting rod (56), and limiting plate (59) and logical groove (57) looks adaptation.