Fire-fighting laser terrain detector

Abstract

The utility model discloses a fire-fighting laser terrain detector, which relates to the technical field of fire-fighting equipment and comprises a laser emitting part, a laser receiving part, a laser transmitting part and a laser receiving part, the power supply part is used for supplying power to the laser emitting part; the power supply part comprises a shell and a power supply arranged in the shell; the laser emitting part comprises a laser emitter and a connecting cable, the laser emitter is electrically connected with a power supply through the connecting cable, and the power supply is used for supplying power to the laser emitter; the laser transmitter is arranged on the shell and detachably connected with the shell, and the problem that in the current fire rescue process, firemen often face the environment with thick smoke, the firemen cannot conveniently observe the terrain, the firemen are difficult to quickly find trapped persons and ignition points, and the rescue speed is delayed is solved. And meanwhile, the possibility that surrounding obstacles threaten the safety of firemen is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire fighting equipment technical field especially is related to fire fighting laser topographic detector. BACKGROUND

[0002] In the fire rescue process, the fireman often faces the environment that the smoke is thick, this seriously influences the sight, is inconvenient for the fireman to observe the terrain, leads to difficultly to find the trapped personnel and the ignition point quickly, thereby influences the rescue speed. Meanwhile, the surrounding obstacles also constitute the threat to the safety of the fireman. Therefore, improving the operation ability of the fireman under the low visibility condition is the important problem that the current urgent solves.

[0003] The existing ordinary white light source equipment is scattered and absorbed by the particle and gas when propagating in the smoke, causes the light to be blurred, cannot effectively penetrate the smoke. This light is dispersed in the process of penetrating the smoke, seriously influences the efficiency and safety of operation.

[0004] Compared with this, the laser as a single wavelength and color light source, its light has the characteristics of high focusing, can penetrate the small smoke particle and gas, and is not influenced by the significant scattering and absorption. The propagation path of the laser is mainly straight line, and due to its small diameter, almost does not occur the beam diffusion, therefore can retain the higher energy in the smoke, the effect is significantly better than the ordinary light source. After the experimental test, the application of the laser in the smoke environment can effectively improve the ability of the fireman to observe the terrain and the surrounding environment, and then improve the rescue speed, guarantee the safety of the fireman. Therefore, exploring the application of the laser technology in the fire rescue has important practical significance and broad development prospect. UTILITY MODEL CONTENT

[0005] Therefore, aiming at the above problems, the utility model provides fire fighting laser topographic detector, solves the problem that the fireman is inconvenient for observing the terrain in the current fire rescue process, the fireman is difficult to find the trapped personnel and the ignition point quickly, thereby delays the rescue speed. Meanwhile, the possibility that the surrounding obstacles cause the threat to the safety of the fireman is greatly reduced.

[0006] The technical scheme of the utility model is:

[0007] The fire fighting laser topographic detector comprises:

[0008] The laser emission part is used for emitting the laser beam;

[0009] The power supply part is used for supplying power for the laser emission part;

[0010] The power supply part comprises a shell and a power supply, and the power supply is arranged in the shell;

[0011] The laser emission part comprises a laser emitter and a connecting cable, the laser emitter is electrically connected with a power supply through the connecting cable, and the power supply is used for supplying power for the laser emitter.

[0012] The laser emitter is arranged on the shell and detachably connected with the shell.

[0013] Preferably, the shell comprises a front shell body and a rear shell body, the front shell body is detachably connected with the rear shell body, and the front shell body and the rear shell body have a mounting cavity therebetween, and the power supply is mounted in the mounting cavity.

[0014] Preferably, the front shell body is provided with a mounting groove, the laser emitter is arranged in the mounting groove and detachably connected with the mounting groove.

[0015] Preferably, the laser emitter is provided with a protrusion, the mounting groove is provided with a limiting groove matched with the protrusion, one end of the limiting groove is provided with an insertion slot, the insertion slot penetrates through the front end of the front shell body and is in communication with the limiting groove, and the protrusion can be inserted into the limiting groove from the insertion slot and slidably matched with the limiting groove.

[0016] Preferably, the rear shell body is provided with an elastic clamping piece, one end of the elastic clamping piece is detachably connected with the rear shell body, and the elastic clamping piece can be clamped on the clothes of a firefighter.

[0017] Preferably, one end of the elastic clamping piece is fixedly provided with a clamping block, the rear shell body is provided with a clamping groove matched with the clamping block, the clamping block is in interference fit with the clamping groove, and the clamping block can be inserted into the clamping groove and fixed.

[0018] Preferably, the rear shell body is provided with a magic tape.

[0019] Preferably, the mounting cavity is provided with a fixing seat and a cable winding assembly, the fixing seat is fixedly arranged on the front shell body and matched with the mounting groove, one end of the mounting groove extends into the fixing seat, and the cable winding assembly is matched arranged on the fixing seat and used for winding and unwinding the connecting cable.

[0020] Preferably, the cable winding assembly comprises a clock spring, a winding drum and a limiting disc, the fixing seat is provided with a fixing ring fixedly connected with the fixing seat, the winding drum is sleeved outside the fixing ring and one end thereof is rotatably connected with the fixing seat, the limiting disc is arranged at the other end of the winding drum and one end thereof is inserted into the fixing ring and threadedly connected with the fixing ring, the winding drum is rotatably connected with the limiting disc, the clock spring is arranged between the fixing ring and the winding drum, one end of the clock spring is fixedly connected with the fixing ring, the other end is fixedly connected with the winding drum, the connecting cable is wound on the winding drum and can be wound back or unwound by the winding drum, the top of the front shell body and the rear shell body is provided with a through port for the connecting cable to pass through, the connecting cable is slidably matched with the through port, one end of the connecting cable is electrically connected with the laser emitter through the through port, and the other end is electrically connected with the power supply.

[0021] Preferably, the installation cavity is provided with a check assembly, the check assembly comprises a rotating gear, a check block, a torsional spring, a check rod, a pushing rod, a limiting block and a mounting rod, the rotating gear is sleeved on the fixed seat and is rotationally connected with the fixed seat, one end of the rotating gear is fixedly connected with the reel, the mounting rod is arranged on one side of the rotating gear and one end thereof is fixedly connected with the front shell body, the limiting block is arranged on the other end of the mounting rod and is fixedly connected with the mounting rod, one end of the check block is arranged on the mounting rod and is rotationally connected with the mounting rod, the other end of the check block is arranged in cooperation with the rotating gear, the torsional spring is sleeved on the mounting rod and is located between the check block and the limiting block, one end of the torsional spring is fixedly connected with the check block and the other end thereof is fixedly connected with the limiting block, the check rod is arranged on one side of the check block and one end thereof is fixedly connected with the front shell body, the rear shell body is provided with an arc-shaped sliding groove, one end of the pushing rod passes through the arc-shaped sliding groove and is fixedly connected with the check block, and the pushing rod is slidably connected with the arc-shaped sliding groove.

[0022] Compared with the prior art, the fire-fighting laser terrain detector has the advantages that:

[0023] The fire-fighting laser terrain detector has the advantages that: the fire-fighting laser terrain detector can be directly worn on the clothes in front of the chest of a firefighter during use, laser beams can be emitted by the laser emitter during use, the firefighter can clearly see the obstacles and trapped personnel in the smoke due to the penetration of the laser beams in the smoke, the problem that the firefighter often faces the environment with thick smoke during the fire rescue process, the firefighter is inconvenient to observe the terrain, and the firefighter is difficult to quickly find the trapped personnel and the ignition point, thereby delaying the rescue speed is solved. Meanwhile, the possibility that the surrounding obstacles threaten the safety of the firefighter is greatly reduced. Meanwhile, the laser emitter and the shell are detachably connected, the laser emitter and the power supply are electrically connected through the connecting cable, and the laser emitter can be detached from the shell and held during use, thereby facilitating use. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the fire-fighting laser terrain detector in the embodiment of the utility model;

[0025] Figure 2 is an exploded structural schematic view of the fire-fighting laser terrain detector in the embodiment of the utility model Figure 1 ;

[0026] Figure 3 is an exploded structural schematic view of the fire-fighting laser terrain detector in the embodiment of the utility model Figure 2 ;

[0027] Figure 4 is a partial exploded structural schematic view of the fire-fighting laser terrain detector in the embodiment of the utility model Figure 1 ;

[0028] Figure 2 is the partial explosion structure schematic of the fire-fighting laser terrain detector in the embodiment of the utility model Figure 6 ;

[0029] Figure 7 is the structure schematic of the front shell and the check assembly in the embodiment of the utility model;

[0030] Figures 1 to 4 is the structure schematic of the front shell in the embodiment of the utility model;

[0031] Mark explanation:

[0032] 10-laser emission part, 100-laser emitter, 101-connection cable, 102-protrusion, 20-power supply part, 200-housing, 201-power supply, 202-front shell, 203-rear shell, 204-mounting groove, 205-limiting groove, 206-insertion slot, 207-elastic clamping piece, 208-clamping block, 209-clamping groove, 210-magic tape, 211-fixing seat, 212-fixing ring, 213-passing port, 214-arc-shaped sliding groove, 30-cable winding assembly, 300-clock spring, 301-reel, 302-limiting disc, 40-check assembly, 400-rotary gear, 401-check block, 402-torsion spring, 403-check rod, 404-pushing rod, 405-limiting block, 406-mounting rod. Specific implementation

[0033] The embodiments of the utility model will be described in detail below in combination with the drawings.

[0034] Embodiment:

[0035] As Figure 3 shown, in order to solve the above problems, the embodiment discloses a fire-fighting laser terrain detector, which comprises:

[0036] Laser emission part 10, laser emission part 10 is used for emitting laser beam;

[0037] Power supply part 20, power supply part 20 is used for supplying power for laser emission part 10;

[0038] Power supply part 20 comprises housing 200 and power supply 201, and power supply 201 is arranged in housing 200;

[0039] Laser emission part 10 comprises laser emitter 100 and connection cable 101, and laser emitter 100 is electrically connected with power supply 201 through connection cable 101, and power supply 201 is used for supplying power for laser emitter 100;

[0040] The laser emitter 100 is arranged on the shell 200 and detachably connected with the shell 200.

[0041] The fire-fighting laser terrain detector has the advantages of small size and light weight, and can be directly worn on the clothes in front of the chest of a firefighter during use. By arranging the laser emitter 100 and the power supply 201, the laser emitter 100 can emit a laser beam during use, and the laser beam hits the front. Due to the penetration of the laser beam in the smoke, the firefighter can clearly see the obstacles and trapped personnel in the smoke. The problem that the firefighter often faces the environment with thick smoke during the fire rescue process, the firefighter is not convenient to observe the terrain, and the firefighter is difficult to quickly find the trapped personnel and the ignition point, thereby delaying the rescue speed is solved. At the same time, the possibility of the surrounding obstacles threatening the safety of the firefighter is greatly reduced. At the same time, the laser emitter 100 is detachably connected with the shell 200, and the laser emitter 100 is electrically connected with the power supply 201 through the connecting cable 101. During use, the laser emitter 100 can also be detached from the shell 200 and held by hand, thereby facilitating use.

[0042] It should be noted that the laser emitter 100 can adopt a multi-line laser in the prior art, and the power supply 201 can adopt a lithium battery in the prior art.

[0043] As shown in Figure 3 In order to assemble the shell 200, the embodiment is changed on the basis of the above-mentioned embodiment, and the difference from the above-mentioned embodiment is that the shell 200 includes a front shell body 202 and a rear shell body 203, the front shell body 202 is detachably connected with the rear shell body 203, the front shell body 202 and the rear shell body 203 have a mounting cavity therebetween, and the power supply 201 is mounted in the mounting cavity.

[0044] During use, the shell 200 can be assembled by arranging the shell 200 as the front shell body 202 and the rear shell body 203. At the same time, the installation of the power supply 201 can be facilitated.

[0045] The front shell body 202 and the rear shell body 203 are detachably connected through bolts, screws or other connecting members, and a sealing strip is arranged at the end of the front shell body 202 and the rear shell body 203 in contact during connection, so as to reduce the entry of dust and fire-fighting water into the shell 200, thereby causing damage to the fire-fighting laser terrain detector.

[0046] It should be noted that the control switch is also included, and the control switch is arranged on the shell and used for controlling the laser emitter to be turned on or turned off.

[0047] As shown in Figure 4As shown, in order to install the laser emitter 100, the embodiment is changed on the basis of the above embodiment, and the difference from the above embodiment is that the front shell 202 is provided with a mounting groove 204, the laser emitter 100 is arranged in the mounting groove 204, and the laser emitter 100 is detachably connected with the mounting groove 204.

[0048] In one embodiment, in order to facilitate the disassembly and assembly of the laser emitter 100, the laser emitter 100 is provided with a protrusion 102, the mounting groove 204 is provided with a limiting groove 205 matched with the protrusion 102, one end of the limiting groove 205 is provided with an insertion groove 206 penetrating through the front end of the front shell 202 and communicating with the limiting groove 205, and the protrusion 102 can be inserted into the limiting groove 205 through the insertion groove 206 and is in sliding fit with the limiting groove 205.

[0049] The protrusion 102 and the limiting groove 205 have a friction force, and the protrusion 102 can be fixed in the limiting groove 205 by the friction force between the protrusion 102 and the limiting groove 205 when the laser emitter 100 is not subjected to an external force.

[0050] In use, the protrusion 102 on the laser emitter 100 can be inserted through the insertion groove 206, and then rotated by 90° clockwise to lock the laser emitter 100, and when the laser emitter 100 needs to be removed, the laser emitter 100 can be rotated by 90° counterclockwise.

[0051] As shown in the drawings, Figures 4 to 5 In order to use the utility model, the embodiment is changed on the basis of the above embodiment, and the difference from the above embodiment is that the rear shell 203 is provided with an elastic clamping piece 207, one end of the elastic clamping piece 207 is detachably connected with the rear shell 203, and the elastic clamping piece 207 can be clamped on the clothes of the firefighter.

[0052] The elastic clamping piece 207 is provided with a clamping block 208 at one end, the rear shell 203 is provided with a clamping groove 209 matched with the clamping block 208, the clamping block 208 is in interference fit with the clamping groove 209, and the clamping block 208 can be inserted into the clamping groove 209 and fixed.

[0053] The elastic clamping piece 207 can facilitate the firefighter to quickly wear the fire-fighting laser terrain detector on the clothes in front of the chest, thereby facilitating quick use.

[0054] In order to further facilitate fixing, the rear shell 203 is provided with a magic tape 210. The magic tape 210 can be stuck on the clothes in front of the chest of the firefighter.

[0055] As shown in the drawings, Figures 6 to 7As shown, in order to facilitate the winding of the connecting cable 101, the embodiment is modified on the basis of the above-mentioned embodiment, and the difference from the above-mentioned embodiment is that the fixing seat 211 and the cable winding assembly 30 are arranged in the mounting cavity. The fixing seat 211 is fixedly arranged on the front shell 202 and is arranged in cooperation with the mounting groove 204. One end of the mounting groove 204 extends into the fixing seat 211. The cable winding assembly 30 is arranged in cooperation with the fixing seat 211 and is used to wind and unwind the connecting cable 101.

[0056] The cable winding assembly 30 comprises a clock spring 300, a reel 301 and a limiting disc 302. The fixing seat 211 is provided with a fixing ring 212 which is fixedly connected with the fixing seat 211. The reel 301 is sleeved outside the fixing ring 212 and is rotatably connected with the fixing seat 211 at one end. The limiting disc 302 is arranged at the other end of the reel 301 and is inserted into the fixing ring 212 at one end and is threadedly connected with the fixing ring 212. The reel 301 is rotatably connected with the limiting disc 302. The clock spring 300 is arranged between the fixing ring 212 and the reel 301 and is fixedly connected with the fixing ring 212 at one end and is fixedly connected with the reel 301 at the other end. The connecting cable 101 is wound on the reel 301 and can be wound or unwound by the reel 301. The top of the front shell 202 and the rear shell 203 is provided with a through port 213 for the connecting cable 101 to pass through. The connecting cable 101 is slidably connected with the through port 213. One end of the connecting cable 101 is electrically connected with the laser emitter 100 through the through port 213. The other end of the connecting cable 101 is electrically connected with the power supply 201.

[0057] In use, the connecting cable 101 on the reel 301 can be pulled out by pulling the laser emitter 100. At the same time, the reel 301 is rotated to make the clock spring 300 contract. When the laser emitter 100 is not pulled, the reel 301 can be rotated under the action of the clock spring 300, so as to realize the winding and unwinding of the connecting cable 101.

[0058] As ​As shown, in order to facilitate the fixing of the connection cable 101 after being pulled out, the embodiment is improved on the basis of the above embodiment, and the difference from the above embodiment is that the installation cavity is provided with a check assembly 40, the check assembly 40 includes a rotating gear 400, a check block 401, a torsional spring 402, a check rod 403, a poking rod 404, a limiting block 405 and a mounting rod 406, the rotating gear 400 is sleeved on the fixed seat 211 and is in rotation connection with the fixed seat 211, one end of the rotating gear 400 is fixedly connected with the reel 301, the mounting rod 406 is arranged on one side of the rotating gear 400 and one end thereof is fixedly connected with the front shell 202, the limiting block 405 is arranged on the other end of the mounting rod 406 and is fixedly connected with the mounting rod 406, one end of the check block 401 is arranged on the mounting rod 406 and is in rotation connection with the mounting rod 406, the other end of the check block 401 is arranged in cooperation with the rotating gear 400, the torsional spring 402 is sleeved on the mounting rod 406 and is located between the check block 401 and the limiting block 405, one end of the torsional spring 402 is fixedly connected with the check block 401 and the other end thereof is fixedly connected with the limiting block 405, the check rod 403 is arranged on one side of the check block 401 and one end thereof is fixedly connected with the front shell 202, the rear shell 203 is provided with an arc-shaped sliding groove 214, one end of the poking rod 404 penetrates through the arc-shaped sliding groove 214 and is fixedly connected with the check block 401, and the poking rod 404 is in sliding connection with the arc-shaped sliding groove 214.

[0059] In use, through the cooperation of the check block 401 and the rotating gear 400, the reel 301 can be prevented from rotating back, and the check rod 403 is used for limiting the check block 401, so that the check block 401 can limit the rotating gear 400, the torsional spring 402 can provide a reset force for the check block 401, so that the rotating gear 400 can only rotate in one direction and is limited to check in the other direction, forming a ratchet check structure in the prior art. In order to facilitate the winding of the connection cable 101, the poking rod 404 is arranged, when it is needed to wind the connection cable 101, the poking rod 404 is only needed to be driven to make the check block 401 and the rotating gear 400 disengage, so that the rotation of the reel 301 can be realized, and the winding process of the connection cable 101 is completed.

[0060] The working principle of the utility model:

[0061] The fire-fighting laser terrain detector has the advantages of small size and light weight, can be directly worn on the clothes in front of the firefighter's chest during use, and can emit laser beams through the laser emitter 100 during use, so that the firefighter can clearly see the obstacles and trapped personnel in the smoke due to the penetration of the laser beams in the smoke.

[0062] The above-described embodiments only express the specific implementation of the utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which are within the protection scope of the utility model.

Claims

1. A fire-fighting laser terrain detector, characterized in that The utility model relates to a laser emitting part (10) for emitting laser beams, a power supply part (20) for supplying power to the laser emitting part (10), and a fixing part (30) for fixing the laser emitting part (10) on a firefighter's clothes. The power supply part (20) includes a housing (200) and a power supply (201) arranged in the housing (200). The laser emitting part (10) includes a laser emitter (100) and a connecting cable (101), the laser emitter (100) is electrically connected to the power supply (201) through the connecting cable (101), and the power supply (201) is used for supplying power to the laser emitter (100). The laser emitter (100) is arranged on the housing (200) and detachably connected to the housing (200). The housing (200) includes a front shell (202) and a rear shell (203), the front shell (202) is detachably connected to the rear shell (203), and the front shell (202) and the rear shell (203) have a mounting cavity therebetween, and the power supply (201) is arranged in the mounting cavity. The front shell (202) is provided with a mounting groove (204), the laser emitter (100) is arranged in the mounting groove (204) and detachably connected to the mounting groove (204).

2. The fire fighting laser terrain profiler according to claim 1, characterized in that The laser emitter (100) is provided with a protrusion (102), the mounting groove (204) is provided with a limiting groove (205) matched with the protrusion (102), one end of the limiting groove (205) is provided with an insertion groove (206) penetrating through the front end of the front shell (202) and communicating with the limiting groove (205), and the protrusion (102) can be inserted into the limiting groove (205) through the insertion groove (206) and slidably matched with the limiting groove (205).

3. The fire fighting laser terrain profiler of claim 2, wherein, The rear shell (203) is provided with an elastic clamping piece (207), one end of the elastic clamping piece (207) is detachably connected to the rear shell (203), and the elastic clamping piece (207) can be clamped on the clothes of the firefighter.

4. The fire fighting laser terrain profiler of claim 3, wherein, One end of the elastic clamping piece (207) is fixedly provided with a clamping block (208), the rear shell (203) is provided with a clamping groove (209) matched with the clamping block (208), the clamping block (208) is in interference fit with the clamping groove (209), and the clamping block (208) can be inserted into the clamping groove (209) and fixed.

5. The fire fighting laser terrain detector according to claim 2 or 4, characterized in that The rear shell (203) is provided with a magic tape (210).

6. The fire fighting laser terrain mapper of claim 5, wherein, The mounting cavity is provided with a fixing seat (211) and a cable winding assembly (30), the fixing seat (211) is fixedly arranged on the front shell (202) and matched with the mounting groove (204), one end of the mounting groove (204) extends into the fixing seat (211), and the cable winding assembly (30) is matched arranged on the fixing seat (211) and used for winding and unwinding the connecting cable (101).

7. The fire fighting laser terrain mapper of claim 6, wherein, ​ 8. The fire fighting laser terrain mapper of claim 7, wherein, ​ 9. The fire fighting laser terrain mapper of claim 8, wherein, The cable winding assembly (30) comprises a clockwork spring (300), a reel (301) and a limiting disc (302), the fixed seat (211) is provided with a fixed ring (212), the fixed ring (212) is fixedly connected with the fixed seat (211), the reel (301) is sleeved outside the fixed ring (212), and one end of the reel (301) is rotatably connected with the fixed seat (211); the limiting disc (302) is arranged at the other end of the reel (301), one end of the limiting disc (302) is inserted into the fixed ring (212), and the limiting disc (302) is threadedly connected with the fixed ring (212); the reel (301) is rotatably connected with the limiting disc (302); the clockwork spring (300) is arranged between the fixed ring (212) and the reel (301), one end of the clockwork spring (300) is fixedly connected with the fixed ring (212), and the other end of the clockwork spring (300) is fixedly connected with the reel (301); the connecting cable (101) is wound on the reel (301) and can be wound back or unwound by the reel (301); the front shell (202) and the rear shell (203) are provided with a passing opening (213) for the connecting cable (101) to pass through, the connecting cable (101) is slidably connected with the passing opening (213), one end of the connecting cable (101) passes through the passing opening (213) and is electrically connected with the laser emitter (100), and the other end of the connecting cable (101) is electrically connected with the power supply (201).

10. The fire fighting laser terrain mapper of claim 9, wherein, The mounting cavity is provided with a check assembly (40), the check assembly (40) comprises a rotating gear (400), a check block (401), a torsion spring (402), a check rod (403), a pushing rod (404), a limiting block (405) and a mounting rod (406), the rotating gear (400) is sleeved on the fixed seat (211) and rotatably connected with the fixed seat (211), one end of the rotating gear (400) is fixedly connected with the reel (301), the mounting rod (406) is arranged on one side of the rotating gear (400) and one end of the mounting rod (406) is fixedly connected with the front shell (202), the limiting block (405) is arranged on the other end of the mounting rod (406) and fixedly connected with the mounting rod (406), one end of the check block (401) is arranged on the mounting rod (406) and rotatably connected with the mounting rod (406), the other end of the check block (401) is arranged in cooperation with the rotating gear (400), the torsion spring (402) is sleeved on the mounting rod (406) and located between the check block (401) and the limiting block (405), one end of the torsion spring (402) is fixedly connected with the check block (401) and the other end of the torsion spring (402) is fixedly connected with the limiting block (405), the check rod (403) is arranged on one side of the check block (401) and one end of the check rod (403) is fixedly connected with the front shell (202), the rear shell (203) is provided with an arc-shaped sliding groove (214), one end of the pushing rod (404) passes through the arc-shaped sliding groove (214) and is fixedly connected with the check block (401), and the pushing rod (404) is slidably connected with the arc-shaped sliding groove (214).

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