CN112170890B

CN112170890B - Shutter processing is with automatic perforating device that has pressure loss structure of preventing

Info

Publication number: CN112170890B
Application number: CN202010978871.6A
Authority: CN
Inventors: 肖金坚
Original assignee: Zhejiang Deshenglong Curtain Co Ltd
Current assignee: Zhejiang Deshenglong Curtain Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-12-21
Anticipated expiration: 2040-09-17
Also published as: CN112170890A

Abstract

The invention relates to an automatic perforating device with a pressure loss prevention structure for processing a louver window, which comprises a bottom plate and a positioning push plate, wherein the lower end of the bottom plate is sequentially connected with a T-shaped block and an upper push plate from back to front, the lower end of the T-shaped block is connected with a waste collection box, a storage box is fixed in front of the upper end of the bottom plate, the interior of the storage box is connected with a material ejecting clamping block through a torsion spring, the upper end of the bottom plate is sequentially connected with an upper material box, a first gear, a processing box and a first air cylinder from left to right, the rear end of the processing box is connected with a second air cylinder, and the positioning push plate is positioned at one end of the first air cylinder. The invention has the beneficial effects that: this shutter processing is with automatic perforating device who has anti-pressure loss structure can place a plurality of tripe leaf through the processing case to make equipment a plurality of tripe leaf carry out the work efficiency of perforating improve equipment simultaneously, pressurize fixed establishment simultaneously and can fix the tripe leaf, prevent to add man-hour and rock, lead to the hole position mistake.

Description

Shutter processing is with automatic perforating device that has pressure loss structure of preventing

Technical Field

The invention relates to the technical field of shutter processing, in particular to an automatic perforating device with a pressure loss prevention structure for shutter processing.

Background

Blinds are a style of window, originating in china. The ancient Chinese buildings are provided with mullions, which are applied to all dynasties from the warrior to the Han dynasties, the mullions are called mullions, and the mullions are also called mullions, namely, mullions, which are original styles of shutters, namely, original states of shutters, and the modern shutters are invented by Americans called John Hanpuson, and the invention patent is obtained in 8 and 21 days 1841, and the shutters are generally relatively wide and are generally used for indoor and outdoor sun shading and ventilation. The shutter curtain wall has multiple functional advantages and is very attractive, and is generally used for high-rise buildings, and the shutter needs to use an automatic punching device during processing to punch the blades of the shutter.

The existing automatic punching device can only punch one blade at a time, so that the punching speed is too low, and meanwhile, the automatic punching device easily generates the problem that the material is wasted due to processing failure caused by punching deviation during working.

Disclosure of Invention

The invention aims to provide an automatic perforating device with a pressure loss prevention structure for processing a louver window, and the automatic perforating device is used for solving the problems that the existing automatic perforating device in the background art can only perforate one blade at a time, so that the perforating speed is too slow, and meanwhile, the automatic perforating device is easy to perforate and deviate during work, so that the processing of materials is failed and waste is caused.

In order to achieve the purpose, the invention provides the following technical scheme: an automatic perforating device with a pressure loss prevention structure for processing a louver comprises a bottom plate and a positioning push plate, wherein a T-shaped block and an upper push plate are sequentially connected to the lower end of the bottom plate from back to front, a first multi-section hydraulic cylinder is connected to the lower end of the upper push plate, a waste collecting box is connected to the lower end of the T-shaped block, a handle is connected to the rear end of the waste collecting box, a material storage box is fixed in front of the upper end of the bottom plate, the front end of the material storage box is connected with a material taking door through a connecting pin, the interior of the material storage box is connected with a material ejecting clamping block through a torsion spring, a material loading box, a first gear, a processing box and a first air cylinder are sequentially connected to the upper end of the bottom plate from left to right, a second air cylinder is connected to the rear end of the processing box, the positioning push plate is positioned at one end of the first air cylinder, the other end of the positioning push plate is connected with a pressure sensor, and a pressurizing fixing mechanism is arranged in the processing box, and the upper end of pressurization fixed establishment is connected with second multisection pneumatic cylinder through the link, the left and right sides of link is connected with the perforation sword, the external connection of first gear has the chain, and the rear end of first gear has connected gradually second gear and delivery roller from a left side to the right side, the rear end of second gear is connected with the third gear, and the lower extreme of third gear installs first motor, the rear end of going up the workbin is connected with the threaded rod through the bearing, and goes up the inside of workbin and has placed the tripe window leaf, the upper end of threaded rod is connected with the second motor, and the external connection of threaded rod has the connecting plate, the lower extreme of connecting plate is connected with second guide arm and second spring from inside to outside, and the lower extreme of second spring is connected with the briquetting.

Preferably, the waste collection box forms a sliding structure with the bottom plate through the T-shaped block, and the waste collection box is bonded with the handle.

Preferably, the push-up plate forms a telescopic structure with the bottom plate through the first multi-section hydraulic cylinder, and the push-up plate is fixedly connected with the first multi-section hydraulic cylinder.

Preferably, the material taking door forms a rotating structure with the material storage box through the connecting pin, and the material storage box and the bottom plate form a welding integrated structure.

Preferably, the ejection fixture block forms an elastic structure with the storage box through the torsion spring, and the torsion spring is fixedly connected with the ejection fixture block.

Preferably, the pressurizing and fixing mechanism comprises a pressing plate, a first spring, a first guide rod and a fixing plate, the first spring is connected to the middle of the upper end of the pressing plate, the first guide rod is connected to the left side and the right side of the upper end of the pressing plate, and the fixing plate is connected to the upper end of the first guide rod.

Preferably, the pressing plate forms a telescopic structure with the fixing plate through the first spring, and the pressing plate forms a sliding structure with the fixing plate through the first guide rod.

Preferably, the outer surface of the second gear is meshed with the outer surface of the third gear, and the second gear is welded with the first gear.

Preferably, the threaded rod forms revolution mechanic through bearing and between the material loading case, and is threaded connection between threaded rod and the connecting plate.

Preferably, the pressing block forms a telescopic structure with the connecting plate through the second spring, and the pressing block forms a sliding structure with the connecting plate through the second guide rod.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the waste collection box is convenient to draw out by a handle through a sliding structure formed between the T-shaped block and the bottom plate by virtue of the waste collection box, so that workers can clean waste in the waste collection box conveniently, meanwhile, the first air cylinder pushes the positioning push plate to enable the pressure sensor to be in contact with the louver blades in the processing box to position the louver blades, when the pressure sensor detects that the pressure obviously changes, the positioning of the louver blades is finished, a plurality of louver blades can be placed in the processing box for processing at the same time, and the processing speed is improved.

2. According to the invention, the processing box is pushed to the upper part of the upper push plate through the second air cylinder, and then the upper push plate is pushed upwards through the first multi-section hydraulic cylinder, so that the louver blades processed in the processing box are pushed to the interior of the storage box for collection, the continuous work of the processing box is facilitated, meanwhile, the number of times of taking the louver blades by workers can be reduced, and the fatigue of the workers is reduced.

3. According to the invention, the ejecting clamping block is used for supporting the louver blades when the upper pushing plate pushes the louver blades into the storage box through the elastic structure formed between the torsion spring and the storage box, so that the louver blades are prevented from falling into the processing box again, and meanwhile, the material taking door is opened through the rotating structure formed between the connecting pin and the storage box by virtue of the material taking door, so that workers can take out the processed louver blades conveniently.

4. The invention can fix the louver blades in the processing box by virtue of the telescopic structure formed between the first spring and the fixed plate through the pressure plate, so as to prevent the louver blades from moving when the perforating knife perforates, thereby preventing the perforating position from generating errors and causing processing failure, meanwhile, the telescopic structure prevents the pressure plate from pressurizing and damaging the louver blades, and the pressure plate is positioned by virtue of the sliding structure formed between the first guide rod and the fixed plate through the pressure plate, thereby preventing the pressure plate from being pressed and held to move.

5. The position of the connecting plate is adjusted through threaded connection between the threaded rod and the connecting plate, so that the pressing block can pressurize the louver blades, the conveying rollers can be in close contact with the louver blades, feeding of the louver blades is facilitated, meanwhile, the pressing block is buffered through the telescopic structure formed between the second spring and the connecting plate and the sliding structure formed between the second guide rod and the connecting plate, the effect that pressurization cannot be achieved due to the fact that the pressing block is not in close contact with the louver blades is prevented, and damage to the louver blades caused by the fact that pressure is too large can also be prevented.

Drawings

FIG. 1 is a schematic view of an automatic perforation device with pressure loss prevention structure for processing a blind according to the present invention;

FIG. 2 is a left side schematic view of a pressing structure of an automatic punching device with a pressure loss prevention structure for processing a blind according to the present invention;

FIG. 3 is a right side schematic view of a receiving structure of an automatic punching device with a pressure loss prevention structure for processing a blind according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 1 of an automatic perforation device with a pressure loss prevention structure for a blind manufacturing machine according to the present invention;

fig. 5 is a schematic side view of an enlarged structure of an ejection fixture block of an automatic piercing device with a pressure loss prevention structure for processing a blind according to the present invention.

In the figure: 1. a base plate; 2. a T-shaped block; 3. a first multi-section hydraulic cylinder; 4. a push plate is arranged; 5. a waste collection tank; 6. a handle; 7. a material storage box; 8. a connecting pin; 9. a material taking door; 10. a torsion spring; 11. ejecting a clamping block; 12. feeding a material box; 13. a first gear; 14. a processing box; 15. a first cylinder; 16. a pressurizing and fixing mechanism; 1601. pressing a plate; 1602. a first spring; 1603. a first guide bar; 1604. a fixing plate; 17. a connecting frame; 18. a second multi-section hydraulic cylinder; 19. a second cylinder; 20. a chain; 21. a conveying roller; 22. a second gear; 23. a first motor; 24. a third gear; 25. a bearing; 26. a threaded rod; 27. a second motor; 28. a connecting plate; 29. a second spring; 30. a second guide bar; 31. briquetting; 32. a louver blade; 33. positioning a push plate; 34. a pressure sensor; 35. a perforating knife.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the present invention provides a technical solution: an automatic perforating device with a pressure loss prevention structure for processing a louver comprises a bottom plate 1 and a positioning push plate 33, wherein the lower end of the bottom plate 1 is sequentially connected with a T-shaped block 2 and an upper push plate 4 from back to front, the lower end of the upper push plate 4 is connected with a first multi-section hydraulic cylinder 3, the upper push plate 4 forms a telescopic structure with the bottom plate 1 through the first multi-section hydraulic cylinder 3, the upper push plate 4 is fixedly connected with the first multi-section hydraulic cylinder 3, a processing box 14 is pushed to the upper side of the upper push plate 4 through a second air cylinder 19, then the upper push plate 4 is pushed upwards through the first multi-section hydraulic cylinder 3, and therefore louver blades 32 processed inside the processing box 14 are pushed to the inside of a storage box 7 to be collected, the processing box 14 can work continuously, meanwhile, the number of times of taking the louver blades 32 by workers can be reduced, and the fatigue of the workers is reduced;

the lower end of the T-shaped block 2 is connected with a waste collection box 5, the rear end of the waste collection box 5 is connected with a handle 6, the waste collection box 5 forms a sliding structure with the bottom plate 1 through the T-shaped block 2, the waste collection box 5 is bonded with the handle 6, the waste collection box 5 is convenient to draw out the waste collection box 5 through the sliding structure formed between the T-shaped block 2 and the bottom plate 1 by the aid of the waste collection box 5, accordingly, workers can clean waste inside the waste collection box 5 conveniently, meanwhile, the first air cylinder 15 pushes the positioning push plate 33 to enable the pressure sensor 34 to be in contact with the louver blades 32 inside the processing box 14 to position the louver blades 32, when the pressure sensor detects that pressure obviously changes, the positioning of the louver blades 32 is completed, a plurality of louver blades 32 can be placed inside the processing box 14 to be processed at the same time, and processing speed is improved;

a storage box 7 is fixed in front of the upper end of the bottom plate 1, the front end of the storage box 7 is connected with a material taking door 9 through a connecting pin 8, the material taking door 9 forms a rotating structure with the storage box 7 through the connecting pin 8, a welding integrated structure is formed between the storage box 7 and the bottom plate 1, the interior of the storage box 7 is connected with an ejecting clamping block 11 through a torsion spring 10, the ejecting clamping block 11 forms an elastic structure with the storage box 7 through the torsion spring 10, the torsion spring 10 is fixedly connected with the ejecting clamping block 11, the ejecting clamping block 11 is used for supporting the louver blades 32 when the pushing plate 4 pushes the louver blades 32 to the interior of the storage box 7 through the elastic structure formed between the torsion spring 10 and the storage box 7, the louver blades 32 are prevented from falling into the processing box 14 again, and the material taking door 9 is used for opening the material taking door 9 through the rotating structure formed between the connecting pin 8 and the storage box 7, the working personnel can conveniently take out the processed louver blades 32;

an upper material box 12, a first gear 13, a processing box 14 and a first air cylinder 15 are sequentially connected to the upper end of a bottom plate 1 from left to right, a second air cylinder 19 is connected to the rear end of the processing box 14, a positioning push plate 33 is located at one end of the first air cylinder 15, a pressure sensor 34 is connected to the other end of the positioning push plate 33, a pressurizing and fixing mechanism 16 is arranged inside the processing box 14, the upper end of the pressurizing and fixing mechanism 16 is connected with a second multi-section hydraulic cylinder 18 through a connecting frame 17, the pressurizing and fixing mechanism 16 comprises a pressing plate 1601, a first spring 1602, a first guide rod 1603 and a fixing plate 1604, a first spring 1602 is connected to the middle of the upper end of the pressing plate 1601, first guide rods 1603 are connected to the left and right sides of the upper end of the pressing plate 1601, the fixing plate 1604 is connected to the upper end of the first guide rod 1603, an expansion structure is formed between the pressing plate 1601 and the fixing plate 1604 through the first spring 1602, and a sliding structure is formed between the pressing plate 1601 and the fixing plate 1604 through the first guide rods 1603, the pressing plate 1601 can fix the louver 32 in the processing box 14 through the telescopic structure formed between the first spring 1602 and the fixing plate 1604, the louver 32 is prevented from moving when the punching blade 35 punches, so that a punching position is wrong, and processing is failed, meanwhile, the telescopic structure prevents the pressing plate 1601 from pressurizing and damaging the louver 32, the pressing plate 1601 forms a sliding structure through the first guide rod 1603 and the fixing plate 1604, the pressing plate 1601 is positioned through the elastic structure, and the pressing plate 1601 is prevented from being pressed and held to move;

the left side and the right side of the connecting frame 17 are connected with perforating knives 35, the outer part of the first gear 13 is connected with a chain 20, the rear end of the first gear 13 is sequentially connected with a second gear 22 and a conveying roller 21 from left to right, the rear end of the second gear 22 is connected with a third gear 24, the lower end of the third gear 24 is provided with a first motor 23, the outer surface of the second gear 22 is meshed with the outer surface of the third gear 24, the second gear 22 is welded with the first gear 13, the rear end of the feeding box 12 is connected with a threaded rod 26 through a bearing 25, a louver blade 32 is arranged in the feeding box 12, the threaded rod 26 forms a rotating structure with the feeding box 12 through a bearing 25, the threaded rod 26 is in threaded connection with a connecting plate 28, the upper end of the threaded rod 26 is connected with a second motor 27, the outer part of the threaded rod 26 is connected with a connecting plate 28, the lower end of the connecting plate 28 is connected with a second guide rod 30 and a second spring 29 from inside to outside, and the lower end of the second spring 29 is connected with a press block 31, the press block 31 forms a telescopic structure between the second spring 29 and the connecting plate 28, the press block 31 forms a sliding structure between the second guide rod 30 and the connecting plate 28, the position of the connecting plate 28 is adjusted through the threaded connection between the threaded rod 26 and the connecting plate 28, so that the press block 31 can pressurize the louver 32, the conveying roller 21 can be in close contact with the louver 32, the feeding of the louver 32 is facilitated, meanwhile, the press block 31 is buffered through the telescopic structure formed between the second spring 29 and the connecting plate 28 and the press block 31 through the sliding structure formed between the second guide rod 30 and the connecting plate 28, the effect that the pressurizing effect cannot be achieved due to the fact that the contact between the press block 31 and the louver 32 is not tight, and the louver 32 is prevented from being damaged due to overlarge pressure.

In summary, when the automatic punching device with the pressure loss prevention structure for the louver processing is used, firstly, a certain amount of louver blades 32 are added into the upper material box 12, then the second motor 27 is opened to drive the threaded rod 26 forming the rotating structure between the bearing 25 and the upper material box 12 to rotate, so that the connecting plate 28 is lifted to pressurize the louver blades 32, the press block 31 is buffered through the second guide rod 30 and the elastic telescopic structure formed between the second spring 29 and the connecting plate 28 by virtue of the press block 31, the effect that the press block 31 and the louver blades 32 cannot be pressurized due to loose contact is prevented, the louver blades 32 can be prevented from being damaged due to overlarge pressure, then the first motor 23 is opened to drive one first gear 13 to rotate through the third gear 24 and the second gear 22, and then the other first gears 13 are driven to rotate through the chain 20, so that the conveying roller 21 stirs the louver blades 32, the louver blades 32 are pushed into the processing box 14, after a certain amount of louver blades 32 enter the processing box 14, the first air cylinder 15 is opened to drive the positioning push plate 33 to push the louver blades 32 to position the louver blades 32, when the pressure sensor 34 changes obviously, the positioning push plate 33 stops pushing and returns to the original position, then the second multi-section hydraulic cylinder 18 is opened to enable the perforating cutter 35 and the pressurizing fixing mechanism 16 to press downwards through the connecting frame 17, the pressing plate 1601 is buffered through the elastic telescopic structure formed between the first spring 1602 and the fixing plate 1604 and the connecting frame 17 by the pressing plate 1601 to enable the pressing plate 1601 to fix the louver blades 32 and prevent the louver blades 32 from moving to cause perforation errors, after the equipment perforation is completed, the processing box 14 is pushed to the upper portion of the upper push plate 4 through the second air cylinder 19, the upper push plate 4 is pushed upwards through the first multi-section hydraulic cylinder 3, and the ejecting fixture blocks 11 are enabled to enable the ejecting fixture blocks 11 to be pushed upwards through the elastic structure formed between the torsion spring 10 and the storage box 7 by the ejecting fixture blocks 11 The shutter leaf 32 that accomplishes the processing shelters from the support to pushing away the inside of the shutter leaf 32 that accomplishes the inside processing of processing case 14 to storage case 7 and collecting, then relying on getting the revolution mechanic that the bin gate 9 constitutes between through connecting pin 8 and storage case 7 to be convenient for get bin gate 9 and open, thereby the staff of being convenient for collects the shutter leaf 32 that the processing was accomplished, rely on the sliding construction that scrap collecting box 5 constitutes through between T-shaped piece 2 and the bottom plate 1 simultaneously to be convenient for the staff to take out the waste material that the perforation produced.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a shutter processing is with automatic perforating device that has pressure loss structure of preventing, includes bottom plate (1) and location push pedal (33), its characterized in that: the lower end of the bottom plate (1) is sequentially connected with a T-shaped block (2) and an upper push plate (4) from back to front, the lower end of the upper push plate (4) is connected with a first multi-section hydraulic cylinder (3), the lower end of the T-shaped block (2) is connected with a waste collection box (5), the rear end of the waste collection box (5) is connected with a handle (6), a storage box (7) is fixed in front of the upper end of the bottom plate (1), the front end of the storage box (7) is connected with a material taking door (9) through a connecting pin (8), the interior of the storage box (7) is connected with a material ejecting clamping block (11) through a torsion spring (10), the upper end of the bottom plate (1) is sequentially connected with an upper material box (12), a first gear (13), a processing box (14) and a first air cylinder (15) from left to right, the rear end of the processing box (14) is connected with a second air cylinder (19), and the positioning push plate (33) is located at one end of the first air cylinder (15), the other end of the positioning push plate (33) is connected with a pressure sensor (34), a pressurizing and fixing mechanism (16) is arranged inside the processing box (14), the upper end of the pressurizing and fixing mechanism (16) is connected with a second multi-section hydraulic cylinder (18) through a connecting frame (17), the pressurizing and fixing mechanism (16) comprises a pressing plate (1601), a first spring (1602), a first guide rod (1603) and a fixing plate (1604), the first spring (1602) is connected to the middle of the upper end of the pressing plate (1601), the first guide rod (1603) is connected to the left side and the right side of the upper end of the pressing plate (1601), the fixing plate (1604) is connected to the upper end of the first guide rod (1603), perforating knives (35) are connected to the left side and the right side of the connecting frame (17), a chain (20) is connected to the outside of the first gear (13), and the rear end of the first gear (13) is sequentially connected with a second gear (22) and a conveying roller (21) from left to right, the rear end of second gear (22) is connected with third gear (24), and first motor (23) are installed to the lower extreme of third gear (24), the rear end of going up workbin (12) is connected with threaded rod (26) through bearing (25), and goes up the inside of workbin (12) and has placed shutter leaf (32), the upper end of threaded rod (26) is connected with second motor (27), and the external connection of threaded rod (26) has connecting plate (28), the lower extreme of connecting plate (28) is connected with second guide arm (30) and second spring (29) from inside to outside, and the lower extreme of second spring (29) is connected with briquetting (31).

2. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: the waste collection box (5) forms a sliding structure with the bottom plate (1) through the T-shaped block (2), and the waste collection box (5) is bonded with the handle (6).

3. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: the upper push plate (4) forms a telescopic structure with the bottom plate (1) through the first multi-section hydraulic cylinder (3), and the upper push plate (4) is fixedly connected with the first multi-section hydraulic cylinder (3).

4. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: the material taking door (9) and the material storage box (7) form a rotating structure through the connecting pin (8), and the material storage box (7) and the bottom plate (1) form a welding integrated structure.

5. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: the ejection clamping block (11) forms an elastic structure with the storage box (7) through the torsion spring (10), and the torsion spring (10) is fixedly connected with the ejection clamping block (11).

6. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: pressing plate (1601) pass through and constitute extending structure between first spring (1602) and fixed plate (1604), and pressing plate (1601) pass through and constitute sliding construction between first guide-bar (1603) and fixed plate (1604).

7. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: the outer surface of the second gear (22) is meshed with the outer surface of the third gear (24), and the second gear (22) is welded with the first gear (13).

8. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: the threaded rod (26) forms a rotating structure with the feeding box (12) through the bearing (25), and the threaded rod (26) is in threaded connection with the connecting plate (28).

9. The automated piercing device for blind processing having the pressure loss prevention structure according to claim 1, wherein: the pressing block (31) forms a telescopic structure with the connecting plate (28) through the second spring (29), and the pressing block (31) forms a sliding structure with the connecting plate (28) through the second guide rod (30).