CN114082116B - Quick rescue scissors - Google Patents

Abstract

The invention relates to the technical field of rescue equipment, in particular to a pair of quick rescue scissors. The specific technical scheme is as follows: the utility model provides a quick rescue scissors, includes on the lateral wall of casing, is located firing mechanism's below is rotated through the connecting pin and is connected the organism, the other end of organism is connected with the connecting cylinder, the other end of connecting cylinder is provided with fixed scissors head, fixed scissors is overhead to rotate through scissors head fixed axle and is connected with movable scissors head, the other end of activity scissors head is rotated through the connecting block and is connected with the scissors axle, the epaxial cover of scissors is equipped with scissors axle spring, the scissors axle is located organism and connecting cylinder, the other end and the ammunition chamber body of scissors axle correspond. The invention solves the problem that the existing rescue equipment is difficult to rescue quickly.

Description

Quick rescue scissors

Technical Field

The invention relates to the technical field of rescue equipment, in particular to a pair of quick rescue scissors.

Background

Sudden disasters such as earthquake, building collapse, explosion and the like cause huge damage to the human society, so that steel barrier objects need to be quickly broken and dismantled in actions such as rescue and emergency rescue, explosion prevention, anti-terrorism and the like. At present, electric saws and hydraulic shears are generally used as main materials in China, the speed and the efficiency are low, and the purpose of quick rescue is difficult to achieve.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the quick rescue scissors, which solve the problem that the existing rescue equipment is difficult to rescue quickly.

In order to realize the purpose, the invention is realized by the following technical scheme:

the invention discloses a trigger mechanism which comprises a handle and a shell arranged on the handle, wherein a trigger is fixedly connected to the inner bottom of the shell through a pawl fixing pin, a pawl and a trigger torsion spring are respectively sleeved on the pawl fixing pin, the other end of the pawl is clamped on a first notch at one end of a hammer, the hammer is vertically arranged in the shell and is fixed in the shell through a hammer fixing screw, the hammer fixing screw is sleeved with a hammer torsion spring, and the side wall at the other end of the hammer corresponds to a trigger mechanism arranged on the side wall of the shell.

Preferably, the interior bottom of casing, be located the below of driving hammer is connected with the non return pawl through non return pawl fixed pin, the cover is equipped with little torsional spring on the non return pawl fixed pin, the other end card of non return pawl on the second breach of driving hammer one end and have the clearance with the second breach.

Preferably, the firing mechanism comprises a firing pin seat arranged on the side wall of the shell, a firing pin component is arranged in the firing pin seat, a firing pin is arranged in the firing pin component, one end of the firing pin extends out of the firing pin component and corresponds to the hammer, and the other end of the firing pin penetrates through the firing pin seat and is flush with the side wall of the firing pin seat; and a firing pin return spring is sleeved on the firing pin and positioned in the firing pin component.

Preferably, be located one side of casing is provided with safety mechanism, safety mechanism is including the safety pin that runs through the casing, be provided with the third breach that corresponds with the hammer on the lateral wall of safety pin, the one end that the safety pin stretches out outside the casing is provided with the safety pin handle.

Correspondingly, a quick rescue scissors, including the aforesaid trigger mechanism, on the lateral wall of casing, be located firing mechanism's below is passed through the connecting pin and is rotated the connection organism, the other end of organism is connected with the connecting cylinder, the other end of connecting cylinder is provided with fixed scissors head, it is connected with movable scissors head to rotate through scissors head fixed axle on the fixed scissors head, the other end of activity scissors head rotates through the connecting block and is connected with the scissors axle, the cover is equipped with scissors axle spring on the scissors axle, the scissors axle is located organism and connecting cylinder, the other end and the cartridge chamber body of scissors axle correspond.

Preferably, be located firing mechanism's top be provided with operating mechanism between casing and the organism, operating mechanism includes and rotates the switch return sheet of connection on the casing lateral wall through the round pin axle, it has button round pin and the fitting pin that is parallel to each other to rotate in proper order through the round pin axle on the switch return sheet, the button round pin runs through the casing setting, casing and organism are connected to the fitting pin, another pot head of button round pin is equipped with the button cover, button cover part stretches into in the casing, the cover is equipped with button spring on the button round pin.

Preferably, the machine body is rotatably connected with a bullet withdrawing block above the connecting pin through a bullet poking device pin, and one end of the bullet withdrawing block extends into the bullet chamber body from the bottom of the bullet chamber body and abuts against the end face of a special bullet in the bullet chamber body.

Preferably, the other end of the fixed scissor head is connected with a limiting sleeve, the limiting sleeve is sleeved in the connecting cylinder, one end of the connecting block is rotatably connected to the movable scissor head through a first fixing shaft, the other end of the connecting block is rotatably connected to one end of the scissor shaft through a second fixing shaft, and one end of the scissor shaft, which is connected with the connecting block, is located in the limiting sleeve.

Preferably, the other end of the scissors shaft is connected with a locking screw cap, one end of the scissors shaft spring is propped against the end face of the locking screw cap, and the other end of the scissors shaft spring is propped against the step face on the scissors shaft; the other end of the anti-loosening screw cap is connected with a piston through a piston head fixing pin, and a groove is formed in the side wall, corresponding to the ammunition chamber body, of the piston; the side wall of the piston is sleeved with a piston sleeve, the side wall of the piston sleeve is provided with at least one annular groove, and a sealing ring retaining ring and an O-shaped sealing ring are arranged in the annular groove.

Preferably, the bottom of the fixed scissor head is provided with a reset hole inclined towards the movable scissor head, one end of the reset hole is provided with a locking cap, a reset rod and a reset spring sleeved on the reset rod are arranged in the reset hole, one end of the reset spring abuts against the locking cap, and the other end of the reset spring abuts against a step surface on the side wall of the reset rod; one end of the reset rod is separated from the locking cap, and the other end of the reset rod extends out of the reset hole and abuts against a stop block on the movable scissor head.

The invention has the following beneficial effects:

1. the invention discloses a trigger mechanism, which comprises a trigger and a pawl fixedly connected with the trigger, wherein one end of the pawl is clamped on a notch at one end of a hammer, the side wall of the hammer directly corresponds to a firing pin of a firing mechanism, when the trigger is pulled, the hammer can strike the firing pin so as to fire a special bullet arranged in a bullet chamber, and further to fire the special bullet, high-pressure gas generated by explosion of the special bullet finally realizes combination of a fixed scissor head and a movable scissor head and finally realizes a shearing action, and in the whole shearing process, shearing acting force is provided by the high-pressure gas generated after explosion of the special bullet, so that the whole shearing operation is high-speed, rapid, time-saving and labor-saving.

2. The invention discloses a pair of quick rescue scissors, which is a special bullet with gunpowder triggered by a trigger mechanism starting a trigger mechanism, wherein the gunpowder is combusted to generate high-pressure gas to push a piston to move, a scissor shaft on the piston pushes a movable scissor head to move towards a fixed scissor head, so that the shearing operation is realized, carbon structural steel with the diameter phi of 20mm can be sheared powerfully, a power supply is not required, and the quick rescue scissors are quick, convenient and efficient, and are suitable for quick breaking and dismantling operation in rescue, explosion prevention, counter terrorism and other activities.

Drawings

FIG. 1 is a schematic structural view of the rescue scissors of the present invention in a natural state;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a partial enlarged view of B in FIG. 2;

FIG. 5 isbase:Sub>A view taken along line A-A of FIG. 1 (orbase:Sub>A cross-sectional view of the switch mechanism);

FIG. 6 is an enlarged view of a portion C of FIG. 5;

FIG. 7 is an enlarged view of D of FIG. 5;

FIG. 8 is a schematic view of the hammer structure;

fig. 9 is a schematic structural view of the movable scissor head;

fig. 10 is a schematic view of the structure of the head of the fixed scissors;

FIG. 11 is a view taken along line B-B of FIG. 10;

FIG. 12 is a schematic view of the body structure;

fig. 13 is a schematic structural diagram of the rescue scissors in a shearing state;

FIG. 14 is a cross-sectional view of FIG. 13;

FIG. 15 is an enlarged view of E in FIG. 14;

FIG. 16 is an enlarged view of portion F of FIG. 14;

FIG. 17 is an enlarged view of G in FIG. 14;

in the figure: handle 1, casing 2, pawl fixing pin 3, trigger 4, pawl 5, trigger torsion spring 6, hammer 7, first gap 8, hammer fixing screw 9, hammer torsion spring 10, non-return pawl 11, non-return pawl fixing pin 12, second gap 13, striker base 14, striker part 15, striker 16, striker return spring 17, safety pin 18, third gap 19, safety pin handle 20, connecting pin 21, machine body 22, connecting cylinder 23, fixed scissor head 24, scissor head fixing shaft 25, movable scissor head 26, connecting block 27, scissor shaft 28, scissor shaft spring 29, cartridge chamber body 30, switch return plate 31, button pin 32, locking pin 33, button sleeve 34, button spring 35, and spring retainer the elastic device comprises an elastic deflector pin 36, an elastic withdrawing block 37, a special elastic 38, a limiting sleeve 39, a first fixing shaft 40, a second fixing shaft 41, a piston 42, a groove 43, a piston sleeve 44, a sealing ring retainer ring 45, an O-shaped sealing ring 46, a reset hole 47, a locking cap 48, a reset rod 49, a reset spring 50, a stop block 51, a buffer ring 52, an air outlet nozzle 53, a connecting nut 54, a silencing nozzle 55, a silencing cover 56, a silencing outer cover 57, a buffer cover 58, an air hole 59, a connecting block screw 60, a locking screw cover 61, a small torsion spring 62, an upper connecting lug 63, a lower connecting lug 64, a connecting column 65, a fourth gap 66, a connecting plate 67, an upper connecting sheet 68, a lower connecting sheet 69, an air outlet pipe 70 and a shunting block 71.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.

Referring to fig. 1-17, the present invention discloses a trigger mechanism, which comprises a grip 1 and a housing 2 disposed on the grip 1, wherein the housing 2 is disposed on a frame of the grip 1. The interior bottom of casing 2 is through 3 fixedly connected with triggers 4 of pawl fixed pin, trigger 4 fixes on pawl fixed pin 3 promptly, the both ends of pawl fixed pin 3 are rotatable, it is equipped with pawl 5 and trigger torsional spring 6 to overlap respectively on the pawl fixed pin 3, the other end card of pawl 5 is on the first breach 8 of hammer 7 one end, the vertical setting of hammer 7 is fixed in casing 2 and through hammer set screw 9 in casing 2, hammer 7 fixes on hammer set screw 9 promptly, and hammer set screw 9's both ends are rotatable, the cover is equipped with hammer torsional spring 10 on hammer set screw 9, the lateral wall of the hammer 7 other end corresponds with the percussion mechanism who sets up on casing 2 lateral walls. It should be noted that: the main function of the trigger torsion spring 6 and hammer torsion spring 10 is to reset the pawl 5 and hammer 7. When the trigger 4 is rotated about the pawl fixing pin 3, the pawl 5 carries the hammer 7 to rotate, so that the hammer strikes the firing mechanism, and the special bullet 38 is fired. When the trigger 4 is released, the hammer and trigger are reset by the hammer torsion spring and trigger torsion spring. It is also noted that: to the setting of trigger torsional spring 6 and hammer torsional spring 10, the both ends of torsional spring are directly supported in casing 2, if there is not the place in casing 2 to support the torsional spring, it can directly to set up the supporting shoe in casing 2. The trigger torsion spring 6 and the hammer torsion spring 10 are directly clamped on the pawl fixing pin 3 and the hammer fixing screw 9, and when the pawl 5 and the hammer 7 rotate, acting force can be applied to the trigger torsion spring and the hammer torsion spring, so that the pawl 5 and the hammer 7 can be reset under the action of the torsion springs.

Further, in order to control the force of the hammer 7 impacting the firing mechanism and control the distance of the hammer impacting the firing mechanism at each time to be the same, a non-return pawl 11 is connected to the inner bottom of the shell 2 and located below the hammer 7 through a non-return pawl fixing pin 12, a small torsion spring 62 is sleeved on the non-return pawl fixing pin 12, and the other end of the non-return pawl 11 is clamped on a second notch 13 at one end of the hammer 7 and has a gap with the second notch 13. It should be noted that: the non-return pawl 11 is arranged in the same manner as the hammer 7, that is, the non-return pawl 11 is fixed to the non-return pawl fixing pin 12, and both ends of the non-return pawl fixing pin 12 are rotatable, and the small torsion spring 62 is sleeved and clamped to the non-return pawl fixing pin 12, and rotates together with the non-return pawl fixing pin 12, that is, the hook portion at one end of the small torsion spring 62 is directly hooked to the depression of the non-return pawl 11 close to the lower side surface. While the non-return pawl 11 is at a distance from the second notch 13 which is the maximum arc length of the hammer 7 per rotation, as can be seen in particular in fig. 4 and 15, in fig. 15, when the hammer strikes the striker 16, the end of the non-return pawl 11 just abuts against the second notch 13.

Further, the firing mechanism includes a striker base 14 disposed on the sidewall of the housing 2, where it can be understood that the striker base 14 is disposed on the handle 1, and as can be seen from fig. 1, 2 and 3, the housing 2 is disposed on the frame of the handle 1, so that the striker base 14 is disposed on the sidewall of the housing 2, or on the handle 1, and is communicated with the inside of the housing 2. Specifically, the method comprises the following steps: a firing pin component 15 is arranged in the firing pin seat 14, a firing pin 16 is arranged in the firing pin component 15, and the firing pin seat 14, the firing pin component 15 and the firing pin 16 are coaxially arranged. The striker base 14 is fixed to the sidewall of the housing 2 by a threaded connection, and both ends of the striker base 14 are flush with the inner and outer sidewalls of the housing 2, respectively, and meanwhile, one end of the striker member 15 is an open end, and the open end extends into the striker base 14 and is fixed to the striker base 14 by a threaded connection, the striker member 15 mainly limits the striker 16, that is, the inner cavity of the striker member 15 is stepped shaft shaped. The striker pin 16 is provided with an annular step on the side wall inside the striker pin unit 15 to avoid the striker pin 16 to leave the striker pin unit 15. One end of the firing pin 16 extends out of the firing pin component 15 and corresponds to the hammer 7, and the other end of the firing pin passes through the firing pin component 15, penetrates through the firing pin base 14 and is flush with the side wall of the firing pin base 14; a firing pin return spring 17 is sleeved on the firing pin 16 in the firing pin component 15, namely, one end of the firing pin return spring 17 abuts against the annular step, and the other end abuts against the inner wall of the firing pin base 14. The chamber 30 is arranged in the body 22 and near the firing pin 16, when the firing pin 16 is struck by the hammer 7, the firing pin 16 moves towards the body 22, the firing pin return spring 17 is compressed, and when the firing pin 16 is struck, it will directly act on the firing part of the special bullet 38, so as to explode the special bullet.

Further, in order to avoid the trigger being pulled in a non-working state to trigger the special bullet, a safety mechanism is arranged on the outer side of the shell 2, the safety mechanism comprises a safety pin 18 penetrating through the shell 2, a third notch 19 corresponding to the hammer 7 is arranged on the side wall of the safety pin 18, and a safety pin handle 20 is arranged at one end of the safety pin 18 extending out of the shell 2. It should be noted that: a safety pin 18 is provided below the firing mechanism. When the third notch 19 on the safety pin corresponds to the hammer 7, which is equivalent to unlocking the hammer 7, the hammer 7 impacts the firing pin 16 under the action of the trigger 4; if the third notch 19 is offset from the hammer 7, the hammer 7 cannot move toward the striker 16, i.e., cannot contact the striker 16, and thus cannot hit the striker 16.

The invention also discloses quick rescue scissors which comprise the trigger mechanism, wherein a machine body 22 is rotatably connected on the side wall of the shell 2 on the same side with the trigger mechanism and below the trigger mechanism through a connecting pin 21, and meanwhile, the connecting pin 21 is positioned obliquely below the safety pin 18. The other end of the body 22 is connected to a connecting cylinder 23, in particular by a screw connection. The other end of connecting cylinder 23 is provided with fixed scissors head 24, rotates through scissors head fixed axle 25 on the fixed scissors head 24 and is connected with movable scissors head 26, and the other end of movable scissors head 26 rotates through connecting block 27 and is connected with scissors axle 28, and the cover is equipped with scissors axle spring 29 on the scissors axle 28, and scissors axle 28 is located organism 22 and connecting cylinder 23, and the other end of scissors axle 28 corresponds with the bullet thorax body 30 that sets up in organism 22. It should be noted that: the body 22 is a hollow cylinder, and the inner diameter of the cylinder 30 is smaller than the inner diameter of the scissor shaft 28. The bore 30 is threaded into the body 22 with one end flush with one end of the body 22 and a special cartridge 38 is disposed in the bore 30. The connecting end of the body 22 and the housing 2 is provided with two engaging lugs, namely an upper engaging lug 63 and a lower engaging lug 64, the connecting pin 21 is rotatably connected with the housing 22 through the lower engaging lug 64, and the overall shape of the lower engaging lug is a connecting fork structure.

Further, a switch mechanism is arranged above the firing mechanism and between the shell 2 and the machine body 22, and the switch mechanism is mainly used for opening the machine body 22 and popping or retreating the shell in the cartridge chamber body 30. Specifically, the method comprises the following steps: referring to fig. 5, the switch mechanism includes a switch return piece 31 rotatably connected to the sidewall of the housing 2 by a pin, that is, a connection post 65 is disposed on the sidewall of the housing 2, and the switch return piece 31 is rotatably connected to the connection post 65 by a pin and transversely disposed; meanwhile, the switch return sheet 31 is sequentially and rotatably connected with a button pin 32 and a locking pin 33 which are parallel to each other through a pin shaft, the button pin 32 penetrates through the shell 2 and is separated from the shell 2, the locking pin 33 is connected with the shell 2 and the machine body 22, namely, the locking pin 33 is inserted into the upper connecting lug 63, at the moment, the connecting part of the shell 2 and the upper connecting lug is in a connecting fork structure, the locking pin 33 is separated from the shell 2 and the machine body 22, namely, the locking pin 33 and the button pin 32 can be pulled out from the machine body and the shell.

Further, in order to unlock the body 22 and the housing 2, the other end of the button pin 32 is sleeved with a button sleeve 34, that is, the button sleeve 34 and the button pin 32 are sleeved together and not fixed, the length of the button sleeve 34 is smaller than the length of the button pin 32, an annular cavity is formed between the button sleeve 34 and the button pin 32, the button sleeve 34 partially extends into the housing 2, the button pin 32 is sleeved with a button spring 35, the button spring 35 partially extends into a gap between the button pin 32 and the button sleeve 34, that is, one end of the button spring 35 extends into the annular cavity, and the other end abuts against a step surface at the end of the button pin 32. The specific operation process is as follows: the button sleeve 34 is pressed towards the switch return sheet 31, so that the switch return sheet carries the button pin and the locking pin to move towards the switch return sheet, at the moment, under the action of the button spring 35, an acting force is also exerted on the switch return sheet, the locking pin is quickly separated from the shell and the connecting lug, the connection between the machine body 22 and the shell 2 is further released, the machine body 22 rotates for a certain angle around the connecting pin 21, the machine body 22 is opened, then the special bullet 38 is added into the bullet chamber 30, or the bullet shell in the bullet chamber 30 is removed. After the pop-up is completed, the body 22 and the shell 2 are combined, at this time, the switch return sheet 31 is pressed to apply an acting force to the button spring 35, the button pin 32 and the button sleeve 34 are reset by the counterforce of the button spring 35 and the applied external force, and in the resetting process, the switch return sheet 31 drives the locking pin 33 to reset, so that the body and the shell are fixed again. Repeating the operation when the cartridge case is next loaded or unloaded.

Further, in order to facilitate the removal of the cartridge case from the cartridge chamber, a cartridge ejecting block 37 is rotatably connected to the body 22 above the connecting pin 21 via a cartridge ejector pin 36, and one end of the cartridge ejecting block 37 extends into the cartridge chamber 30 from the bottom of the cartridge chamber 30 and abuts against the end face of a special cartridge 38 in the cartridge chamber 30. It should be noted that: referring to fig. 11, a fourth gap 66 is provided on the body 22 above the lower engaging lug 64, and a pin hole is provided on the gap, the ejector pin 36 rotatably connects the ejection block 37 to the body 22 through the pin hole, and one end of the ejection block 37 extends into the chamber 30 and is clamped in the recess of the shell end of the special bullet 38. After the ammunition in the special ammunition is fired, when the ammunition body is opened, the ammunition withdrawing block 37 can directly withdraw the cartridge case in the ammunition chamber body without manual withdrawal.

Furthermore, the other end of the fixed scissor head 24 is connected with a limiting sleeve 39, the limiting sleeve 39 is sleeved in the connecting cylinder 23 and is connected with the connecting cylinder 23 through threads, one end of the connecting block 27 is rotatably connected to the movable scissor head 26 through a first fixing shaft 40, the other end of the connecting block is rotatably connected to one end of the scissor shaft 28 through a second fixing shaft 41, and one end of the scissor shaft 28, which is connected with the connecting block 27, is located in the limiting sleeve 39, namely, the inner hole diameter of the limiting sleeve 39 is greater than or equal to the diameter of one end (namely, the end of the scissor shaft, which is connected with the connecting block) of the scissor shaft 28. It should be noted that: the fixed scissor head 24 is connected with the limiting sleeve 39 through a U-shaped connecting plate 67, the connecting block 27 on the movable scissor head 26 is positioned in the U-shaped groove of the connecting plate 67, meanwhile, as shown in fig. 8, the movable scissor head 26 is provided with two connecting sheets which are an upper connecting sheet 68 and a lower connecting sheet 69 respectively, the upper connecting sheet 68 is in a connecting fork structure, the fixed scissor head 24 is rotatably connected with the lower connecting sheet 69 through the scissor head fixing shaft 25, and the connecting block 27 is rotatably connected with the upper connecting sheet 68 through the first fixing shaft 40.

Further, in order to prevent the connecting block 27 from moving or shaking axially along the first and second fixed shafts 40 and 41, connecting block screws 60 are provided on the connecting block 27 to abut against the first and second fixed shafts 40 and 41, respectively. It should be noted that: the two connecting block screws 60 are respectively connected with the connecting block 27 in a threaded manner, and the connecting block screws 60 are inserted into the connecting block 27 and then respectively abut against the side walls of the first fixing shaft 40 and the second fixing shaft 41, so that the connecting block 27 and the fixing shafts are stabilized together, the two ends of the connecting block 27 are prevented from moving or shaking along the axial direction of the fixing shafts, and meanwhile, the stability of the connecting block 27 and the two fixing shafts is also improved.

Further, the other end of the scissors shaft 28 is connected with a locking screw cap 61, that is, a thread groove is formed on the end surface of the other end of the scissors shaft 28, the locking screw cap 61 is inserted into the thread groove to be in threaded connection with the scissors shaft 28, and the diameter of the locking screw cap 61 is larger than that of the scissors shaft 28; the anti-loosening screw cap 61 is disposed in the body 22 and near the barrel 30. One end of the scissors shaft spring 29 is propped against the end surface of the anti-loosening screw cover 61, and the other end is propped against the step surface on the scissors shaft 28; the other end of the anti-loosening screw cap 61 is connected with the piston 42 through two piston head fixing pins, namely, arc-shaped grooves are respectively formed in the anti-loosening screw cap 61 and the piston head 42, so that the piston head fixing pins are clamped in the arc-shaped grooves, and the anti-loosening screw cap and the piston 42 are fixed. Of course, the check screw cap 61 and the piston 42 may be fixed by screw connection. Meanwhile, the side wall of the piston 42 corresponding to the cartridge chamber body 30 is provided with the groove 43, when gunpowder in the special cartridge explodes, the impact force generated by the explosion can be concentrated by the arranged groove 43, so that the impact force on the piston 42 is increased, the biting force of the movable scissor head 26 and the fixed scissor head 24 is larger, and the special cartridge can be more suitable for different occasions. In order to avoid the leakage of the air pressure generated by explosion from the periphery of the piston 42, the side wall of the piston 42 is sleeved with a piston sleeve 44, the piston sleeve 44 is attached to the inner wall of the machine body 22 as much as possible, meanwhile, the side wall of the piston sleeve 44 is provided with at least one annular groove along the circumferential direction thereof, and a sealing ring retainer ring 45 and an O-shaped sealing ring 46 are arranged in the annular groove. Referring to fig. 17, two sealing rings 45 are disposed in one annular groove, and an O-ring 46 is disposed between the two sealing rings 45, so as to increase the sealing performance between the piston sleeve 44 and the machine body 22, and when the piston 42 moves axially along the machine body 22, it can be well ensured that the impact force generated by explosion directly acts on the piston 42, and the generated air pressure is prevented from escaping from the periphery of the piston to the maximum extent.

Furthermore, in order to allow the movable scissor head 26 to be quickly returned after the fixed scissor head and the movable scissor head are combined, a return hole 47 is formed in the bottom of the fixed scissor head 24 (i.e., the bottom of the connecting plate 67) and is inclined toward the movable scissor head 26, and the return hole 47 is communicated with a channel of the fixed scissor head 24 through which the scissor head fixing shaft 25 passes, as shown in fig. 10. A locking cap 48 is arranged at one end of the reset hole 47 close to the limit sleeve 39 or the connecting cylinder 23, the locking cap 48 is in threaded connection with the reset hole 47, a reset rod 49 and a reset spring 50 sleeved on the reset rod 49 are arranged in the reset hole 47, one end of the reset spring 50 abuts against the locking cap 48, and the other end of the reset spring abuts against a step surface on the side wall of the reset rod 49 in the reset hole 47; one end of the reset rod 49 is away from the locking cap 48, and the other end extends out of the reset hole 47 and abuts against a stop 51 on the movable scissor head 26. It should be noted that: the length of the reset rod 49 extending into the reset hole 47 is less than the length of the reset hole 47, so that a certain distance is formed between one end of the reset rod 49 and the locking cap 48. When the fixed scissor head 24 and the movable scissor head 26 are merged, the return spring 50 is compressed under the action of the return rod 49; when the cutting operation is completed, the movable scissor head 26 is separated from the fixed scissor shaft 24 under the combined action of the return spring 50 and the scissor shaft spring 29, that is, the movable scissor head 26 is returned, and the state is shown in fig. 1, fig. 1 is a view of the scissors in a natural state, and fig. 13 is a view of the scissors in a cutting state.

Furthermore, in order to realize the vibration and buffering effect on the connecting cylinder after the special bullet is fired, a plurality of buffering rings 52 are arranged in the connecting cylinder 23 and between the limiting sleeve 39 and the end surface of the machine body 22 extending into the connecting cylinder 23, namely the buffering rings 52 are arranged on the inner wall of the connecting cylinder 23, and the number of the buffering rings 52 can be set according to actual requirements. Scissor shaft spring 29 is disposed through cushion ring 52.

And further. In order to reduce the noise generated by the using process of the rescue scissors or the sound generated by the striking of special bullets, a silencing mechanism is arranged on the machine body 22, the silencing mechanism comprises an air outlet nozzle 53 arranged on the side wall of the machine body 22, and the air outlet nozzle 53 is communicated with the interior of the machine body 22 and is arranged at a position close to the piston 42. The air outlet nozzle 53 is sleeved with a connecting nut 54, namely, the air outlet nozzle 43 is connected with the connecting nut 54 through threads; be provided with the internal diameter in the gas outlet nozzle 53 from the gas outlet nozzle 53 towards the outer amortization mouth 55 of grow gradually of gas outlet nozzle 53, the one end of amortization mouth 55 stretches out from the one end of coupling nut 54, the coupling nut 54 overcoat is equipped with amortization lid 56, is connected with amortization enclosing cover 57 on the amortization lid 56, and the center department of amortization enclosing cover 57 is provided with the buffer cover 58 that corresponds with amortization mouth 55, on the amortization enclosing cover 57, around buffer cover 58 being provided with a plurality of gas pocket 59. It should be noted that: the silencing cover 56 is sleeved outside the connecting nut 54 and is in threaded connection with the connecting nut 54, and meanwhile, the silencing outer cover 57 is in threaded connection with the silencing cover 56. An air outlet pipe 70 is arranged at the middle position of the silencing cover 56, and the air outlet pipe 70 is coaxial and communicated with the air outlet nozzle 53 and the connecting nut 54. One end of the silencing nozzle 55 is inserted into the inner hole of the air outlet nozzle 53, the other end of the silencing nozzle is fixedly connected with the screw hole in the center of the end face of the connecting nut 54 through threads, and the end face of the silencing nozzle is flush with the end face of the connecting nut 54 in the silencing cover 56. The inner hole of the silencing nozzle 55 is gradually enlarged from one end positioned in the air outlet nozzle 53 to the other end, so that redundant air pressure in the machine body is better released, and the pressure born by the machine body is relieved.

And the buffering cover 58 is arranged at the center of the sound attenuation outer cover 57, the open end of the buffering cover is arranged towards the air outlet pipe 70, a conical flow dividing block 71 is arranged at the center of the buffering cover 58, and the tip part of the flow dividing block 71 extends into the air outlet pipe 70. When high-pressure airflow generated by explosion is sprayed out through the air outlet pipe 70, the flow dividing block 71 firstly divides the airflow to enable the airflow to run out from the periphery of the flow dividing block 71, then the airflow impacts the area between the flow dividing block 71 and the buffer cover 58, runs out from the opening of the buffer cover 58 to enter the area of the silencing cover 56, and finally is discharged through the air hole 59 in the silencing outer cover 57.

When the invention is used, firstly the safety pin handle 20 is rotated to make the third notch 19 on the safety pin 18 correspond to the hammer 7, then the trigger 4 is pulled to make the hammer 7 impact the firing pin 16, the firing pin 16 moves towards the special bullet 38, the firing pin 16 directly impacts the end part of the special bullet 38, thereby firing the special bullet 38, and the high-pressure air flow generated by the explosion of the special bullet 38 directly pushes the scissors shaft 28 to move towards the direction of the fixed scissors head 24, the scissors shaft spring 29 is compressed, thereby the movable scissors head 26 rotates around the scissors head fixing shaft 25, the reset rod 49 moves towards the locking cap 48, the reset spring 50 is compressed until the movable scissors head 26 and the fixed scissors head 24 are combined, thereby completing the shearing operation. In the process, redundant high-pressure air flow is sprayed out from the air hole 59 through the air outlet nozzle 53, and the purposes of pressure relief and noise reduction are achieved. After the complete cutting operation, the movable scissor head 26 is separated from the fixed scissor head 24 by the return spring 50 and the scissor shaft spring 29, so that the movable scissor head 26 is returned. The arming pin 18 is then manually reset. Then, the button sleeve 34 is pressed to enable the switch return sheet 31 and the connecting column 65 to rotate, meanwhile, the switch return sheet 31 drives the locking pin 33 to release the fixation between the machine body 22 and the shell body 2, so that the machine body 22 is opened, in the opening process, the bullet withdrawing block 37 withdraws the bullet shell, and the special bullet 38 is put into the bullet chamber body 30 again; then the body 22 and the shell 2 are closed, the switch return sheet 31 is pressed, and the switch return sheet 31 resets the locking pin 33 under the action of external force and the button spring 35, so that the body 22 and the shell 2 are connected together again by the locking pin 33. When the shearing operation needs to be carried out for multiple times, the steps are directly repeated.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims (7)

1. The utility model provides a trigger mechanism, includes handle (1) and casing (2) of setting on handle (1), its characterized in that: the inner bottom of the shell (2) is fixedly connected with a trigger (4) through a pawl fixing pin (3), the pawl fixing pin (3) is respectively sleeved with a pawl (5) and a trigger torsion spring (6), the other end of the pawl (5) is clamped on a first notch (8) at one end of a hammer (7), the hammer (7) is vertically arranged in the shell (2) and fixed in the shell (2) through a hammer fixing screw (9), the hammer fixing screw (9) is sleeved with a hammer torsion spring (10), and the side wall at the other end of the hammer (7) corresponds to a firing mechanism arranged on the side wall of the shell (2);

the inner bottom of the shell (2) is positioned below the hammer (7) and is connected with a non-return pawl (11) through a non-return pawl fixing pin (12), a small torsion spring is sleeved on the non-return pawl fixing pin (12), the other end of the non-return pawl (11) is clamped on a second notch (13) at one end of the hammer (7) and has a gap with the second notch (13), the gap is the maximum arc length of each rotation of the hammer (7), and when the hammer (7) impacts a hammer pin (16), the end part of the non-return pawl (11) just abuts against the second notch (13);

be located one side of casing (2) is provided with safety mechanism, safety mechanism is including insurance round pin (18) that run through casing (2), be provided with third breach (19) that correspond with hammer (7) on the lateral wall of insurance round pin (18), when third breach (19) correspond with hammer (7), remove the locking to hammer (7), hammer (7) strike pin (16), when third breach (19) stagger with hammer (7), hammer (7) are locked, can't strike pin (16), the outer one end that safety round pin (18) stretch out casing (2) is provided with insurance round pin handle (20).

2. A trigger mechanism according to claim 1, wherein: the firing mechanism comprises a firing pin seat (14) arranged on the side wall of the shell (2), a firing pin component (15) is arranged in the firing pin seat (14), a firing pin (16) is arranged in the firing pin component (15), one end of the firing pin (16) extends out of the firing pin component (15) and corresponds to the hammer (7), and the other end of the firing pin (16) penetrates through the firing pin seat (14) and is flush with the side wall of the firing pin seat (14); a firing pin return spring (17) is sleeved on the firing pin (16) and positioned in the firing pin component (15).

3. The utility model provides a quick rescue scissors which characterized in that: the trigger mechanism comprises the trigger mechanism according to any one of claims 1-2, wherein the side wall of the housing (2) is rotatably connected with an organism (22) below the trigger mechanism through a connecting pin (21), the other end of the organism (22) is connected with a connecting cylinder (23), the other end of the connecting cylinder (23) is provided with a fixed scissor head (24), the fixed scissor head (24) is rotatably connected with a movable scissor head (26) through a scissor head fixing shaft (25), the other end of the movable scissor head (26) is rotatably connected with a scissor shaft (28) through a connecting block (27), the scissor shaft (28) is sleeved with a scissor shaft spring (29), the scissor shaft (28) is positioned in the organism (22) and the connecting cylinder (23), and the other end of the scissor shaft (28) corresponds to a cartridge body (30) arranged in the organism (22);

be located trigger mechanism's top be provided with switching mechanism between casing (2) and organism (22), switching mechanism includes through round pin axle rotation connection switch return sheet (31) on casing (2) lateral wall, switch return sheet (31) are gone up and are rotated in proper order through the round pin axle and be connected button round pin (32) and fitting pin (33) that are parallel to each other, button round pin (32) run through casing (2) and set up, casing (2) and organism (22) are connected in fitting pin (33), another pot head of button round pin (32) is equipped with button cover (34), button cover (34) part is stretched into in casing (2), the cover is equipped with button spring (35) on button round pin (32).

4. Quick rescue scissors according to claim 3, characterized in that: an ejection withdrawing block (37) is rotatably connected to the machine body (22) and positioned above the connecting pin (21) through an ejector pin (36), and one end of the ejection withdrawing block (37) extends into the magazine body (30) from the bottom of the magazine body (30) and abuts against the end face of a special bullet (38) in the magazine body (30).

5. Quick rescue scissors according to claim 3, characterized in that: the other end of fixed scissors head (24) is connected with stop collar (39), stop collar (39) cover is established in connecting cylinder (23), the one end of connecting block (27) is passed through first fixed axle (40) and is rotated the connection on activity scissors head (26), and the other end passes through second fixed axle (41) and rotates the one end of connecting at scissors axle (28), the one end that connecting block (27) was connected in scissors axle (28) is located stop collar (39).

6. Quick rescue scissors according to claim 5, characterized in that: the other end of the scissors shaft (28) is connected with a locking screw cap (61), one end of the scissors shaft spring (29) is propped against the end face of the locking screw cap (61), and the other end of the scissors shaft spring is propped against the step face on the scissors shaft (28); the other end of the anti-loosening screw cover (61) is connected with a piston (42) through a piston head fixing pin, and a groove (43) is formed in the side wall, corresponding to the bullet chamber body (30), of the piston (42); the piston is characterized in that a piston sleeve (44) is sleeved on the side wall of the piston (42), at least one annular groove is formed in the side wall of the piston sleeve (44), and a sealing ring retainer ring (45) and an O-shaped sealing ring (46) are arranged in the annular groove.

7. Quick rescue scissors according to claim 3, characterized in that: a reset hole (47) which inclines towards the movable scissor head (26) is formed in the bottom of the fixed scissor head (24), a locking cap (48) is arranged at one end of the reset hole (47), a reset rod (49) and a reset spring (50) which is sleeved on the reset rod (49) are arranged in the reset hole (47), one end of the reset spring (50) is abutted against the locking cap (48), and the other end of the reset spring is abutted against a step surface on the side wall of the reset rod (49); one end of the reset rod (49) is arranged away from the locking cap (48), and the other end of the reset rod extends out of the reset hole (47) and is abutted against a stop block (51) on the movable scissor head (26).

Images