Safety detection device for weak current engineering

Abstract

The invention relates to the technical field of detection equipment, in particular to a safety detection device for weak current engineering, which comprises a storage unit and a carding unit, and the storage unit is fixedly arranged in a detector. The detection line is stored through the storage unit, the detection line can be shelled during use and can be stored in the detector through the storage unit after use, the use is convenient and fast, the overall attractiveness of the detector is improved, meanwhile, due to the fact that the detection line is stored in the detector, the knotting and winding problems are avoided, and the detection efficiency is improved. And the end part of the brake shoe slides along the inner wall of the friction deceleration ring in a sliding friction manner, so that the resilience force of the vortex spring cannot quickly drive the spool to reversely rotate and reset, and the detection line is prevented from being broken due to the overhigh rotating speed of the spool.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, in particular to a safety detection device for weak current engineering. Background Art

[0002] Weak current engineering is a category of power applications. Power applications can be divided into strong current and weak current according to the strength of the power transmission. The electricity used in buildings and building complexes generally refers to weak current of AC 220V 50Hz and below, which mainly provides electricity to people and converts electricity into other energy sources, such as air conditioning, lighting, and power. Weak current engineering safety detection devices are safety detection devices used in weak current engineering. They are usually used to detect whether there is leakage and the power supply status. Usually, there are devices such as multimeters and ammeters, which have good detection effects.

[0003] The detection wires used in the multimeters currently in use are generally exposed to the outside, and the length cannot be adjusted according to the requirements of use. In addition, in order to facilitate portability, the detection wires usually need to be wrapped around the multimeter when not in use. This not only affects the overall aesthetics of the multimeter, but also easily causes the detection wires to become tangled, bringing inconvenience to use. To this end, we propose a safety detection device for weak current engineering to solve the above technical problems. Summary of the Invention

[0004] The present invention provides the following technical solution: a safety detection device for weak current engineering, comprising:

[0005] Detector;

[0006] The storage unit is fixedly arranged inside the detector and is used to store the detection line. The storage unit includes:

[0007] Positioning pin 1, fixedly installed on the lower part of the inner wall on the back of the detector;

[0008] The I-shaped wheel is rotatably mounted on an outer wall of the positioning pin, and a detection harness for weak current detection is wound inside;

[0009] The circular cavity is placed on the front of the spool;

[0010] The vortex spring is fixedly arranged inside the circular cavity;

[0011] Slide rail, fixedly installed on the back of the vortex spring;

[0012] Slider 1, slidably mounted inside the slide rail;

[0013] A shift rod, fixedly mounted on the back of a slider;

[0014] The back plate is fixedly mounted on an outer wall of the positioning pin and is located at the rear end of the I-shaped wheel;

[0015] The adapter slot is provided on the inner wall of the back panel;

[0016] The friction reduction ring is rotatably mounted inside the adapter groove;

[0017] Slider 2, slidably mounted inside the slide rail;

[0018] The brake shoe is fixedly mounted on a side of the slider 2 away from the slider 1.

[0019] As a preferred solution of the present invention, the two ends of the vortex spring are respectively clamped on the outer wall of the positioning pin one and the inner wall of the circular cavity. There are two slide rails, and the two slide rails are symmetrically distributed about the center of the I-shaped wheel. The slider two is located on the side of the slider one away from the center of the I-shaped wheel. An arch spring is fixedly installed between the slider one and the slider two, and the end curvature of the brake shoe matches the curvature of the inner wall of the friction reduction ring.

[0020] As a preferred solution of the present invention, a plurality of positioning grooves distributed at equal angles are provided on the front of the friction reduction ring, the positioning grooves are located on the periphery of the adapter groove, and the interior of the positioning grooves is connected to the interior of the adapter groove, and a fixed block is fixedly installed inside the positioning grooves, and a spring piece 1 is fixedly installed on a side of the fixed block close to the adapter groove, and a ratchet is fixedly installed on the front half of the outer wall of the friction reduction ring, and the ratchet is unidirectionally engaged with the spring piece 1.

[0021] As a preferred solution of the present invention, two spiral grooves with equal angles are opened through the back of the back plate, the spiral direction of the spiral groove is adapted to the direction of the ratchet teeth of the ratchet wheel, and the outer walls of the two arch springs are respectively slidably connected to the inner walls of the two spiral grooves.

[0022] As a preferred solution of the present invention, a ratchet 1 is provided on the rear part of the outer wall of the I-shaped wheel, and the opening direction of the ratchet 1 is the same as the opening direction of the ratchet of the ratchet wheel. A guide block is fixedly installed on the inner wall of the back side of the detector, and a pawl is slidably installed inside the guide block. The pawl is unidirectionally engaged with ratchet 1, and a square groove is provided inside the pawl. A spring 1 is fixedly installed inside the square groove, and the spring 1 is fixedly installed between the left inner wall of the square groove and the left side of the guide block.

[0023] As a preferred solution of the present invention, a U-shaped groove is provided at the top right end of the pawl, a positioning pin 2 is fixedly installed on the inner wall of the back side of the detector, a pry bar is installed on the outer wall of the positioning pin 2, the bottom of the pry bar is slidably installed inside the U-shaped groove, and the top of the pry bar is movably extended to the outer periphery of the right side of the detector.

[0024] As a preferred solution of the present invention, it also includes a combing unit, which includes an axle pin. Two axle pins distributed up and down are fixedly installed on the inner wall of the back of the detector. Combing rubber wheels are rotatably installed on the outer walls of the two axle pins. Pullies are fixedly installed on the outer walls of the axle pins. The pulleys are located on the back of the combing rubber wheels. A belt is commonly connected to the outer periphery of the upper and lower pulleys, and the belts are twisted in opposite directions.

[0025] As a preferred solution of the present invention, a transmission wheel is fixedly installed on the outer wall of one of the shaft pins located below, and the transmission wheel is located between the combing rubber wheel and the pulley. A plurality of spring pieces 2 distributed at equal angles are fixedly installed on the outer wall of the transmission wheel, and the two ends of the spring pieces are in contact with the ratchet 1.

[0026] As a preferred solution of the present invention, a baffle is fixedly mounted on the inner wall of the back side of the detector, and the surface of the baffle abuts against two ends of one of the springs located at the bottom of the transmission wheel.

[0027] As a preferred solution of the present invention, grooves are provided at the ends of the combing rubber wheels.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In the present invention, the detection line is stored through the storage unit. When in use, the detection line can be pulled out of the shell. After use, the detection line can be stored inside the detector through the storage unit. It is not only convenient to use, but also improves the overall aesthetics of the detector. At the same time, since the detection line is stored inside the detector, there will be no knotting or entanglement problem, which brings convenience to use.

[0030] 2. In the present invention, when the storage unit stores the detection line into the detector, the brake shoe cannot drive the friction reduction ring to rotate counterclockwise due to the friction between the end of the brake shoe and the inner wall of the friction reduction ring during the counterclockwise rotation of the slider 2. Therefore, the end of the brake shoe slides and rubs along the inner wall of the friction reduction ring. Therefore, the rebound force of the vortex spring cannot quickly drive the I-shaped wheel to rotate counterclockwise and reset, thereby avoiding the detection line from breaking due to the excessive speed of the I-shaped wheel.

[0031] 3. In the present invention, when the storage unit stores the detection line into the detector, slider 1 drives the lever to move in the opposite spiral direction along the spiral groove during the rotation of the slide rail, so that slider 1 moves toward the center of the I-shaped wheel, and the arch spring gradually rebounds, so the elastic thrust on slider 2 and the brake shoe gradually decreases. That is to say, as the resilience of the vortex spring is gradually released, the elasticity of the vortex spring gradually weakens, and the elastic thrust on slider 2 through the arch spring is weakened, that is, the pressure between the end of the brake shoe and the friction reduction ring is weakened, and the friction between the two is reduced, so that the rebound force of the vortex spring always corresponds to the size of the rebound force, ensuring the uniform rotation of the I-shaped wheel, and at the same time, ensuring that the rebound force of the vortex spring can be effectively released.

[0032] 4. In the present invention, while the storage unit stores the detection line into the detector, the upper and lower combing rubber wheels of the combing unit rotate in opposite directions to rub the outer wall of the detection line, generating a friction force on the outer wall of the detection line away from the I-shaped wheel, thereby tightening the detection line in the area between the I-shaped wheel and the combing rubber wheel to ensure the tightness of the detection line wound inside the I-shaped wheel and avoid the accumulation and entanglement of the detection line. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 Schematic diagram of the partial cross-sectional structure of the detector in the present invention;

[0035] Figure 3 For the present invention Figure 2 Schematic diagram of the local structure;

[0036] Figure 4 Schematic diagram of the back structure of the I-shaped wheel in the present invention;

[0037] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0038] Figure 6 Schematic diagram of the structure of the back plate in the present invention;

[0039] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of part B;

[0040] Figure 8 Schematic diagram of the structure of the spiral groove in the present invention;

[0041] Figure 9 Schematic diagram of the structure of the friction reduction ring in the present invention;

[0042] Figure 10 For the present invention Figure 8 Schematic diagram of the enlarged structure of part C;

[0043] Figure 11 Schematic diagram of the back structure of the combing unit in the present invention;

[0044] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure of part D.

[0045] In the figure: 100, detector; 200, storage unit; 201, positioning pin 1; 202, I-shaped wheel; 203, placement circular cavity; 204, vortex spring; 205, slide rail; 206, slider 1; 207, lever; 208, back plate; 209, adapter groove; 2010, friction reduction ring; 2011, ratchet; 2012, positioning groove; 2013, fixing block; 2014, spring piece 1; 2015, slider 2; 2016, brake shoe; 20 17. Arch spring; 2018. Spiral groove; 2019. Ratchet 1; 2020. Guide block; 2021. Pawl; 2022. Square groove; 2023. Spring 1; 2024. U-shaped groove; 2025. Locating pin 2; 2026. Pry bar; 300. Combing unit; 301. Axis pin; 302. Combing rubber wheel; 3002. Groove; 303. Pulley; 304. Belt; 305. Drive wheel; 306. Shrapnel 2; 307. Stop bar. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] See also Figures 1 to 12 The technical solution provided by the present invention specifically includes the following embodiments:

[0048] A safety detection device for weak current engineering includes a detector 100, a storage unit 200, and a combing unit 300; the storage unit 200 is fixedly arranged inside the detector 100 and is used to store detection wires. The storage unit 200 includes:

[0049] The positioning pin 201 is fixedly mounted on the lower part of the inner wall at the back of the detector 100; the I-shaped wheel 202 is rotatably mounted on the outer wall of the positioning pin 201 and has a detection harness for weak current detection wound inside; the placement circular cavity 203 is opened on the front of the I-shaped wheel 202; the vortex spring 204 is fixedly arranged inside the placement circular cavity 203; the slide rail 205 is fixedly mounted on the back of the vortex spring 204; the slider 206 is slidably mounted inside the slide rail 205; the lever 207 is fixedly mounted on the back of the slider 206; the back plate 208 is fixedly mounted on the outer wall of the positioning pin 201 and is located at the rear end of the I-shaped wheel 202; the adapter groove 209 is fixedly mounted on the outer wall of the positioning pin 201 and is located at the rear end of the I-shaped wheel 202; the adapter groove 209 is fixedly mounted on the back of the vortex spring 204; the slider 206 is slidably mounted inside the slider 205; the lever 207 is fixedly mounted on the back of the slider 206; the back plate 208 is fixedly mounted on the outer wall of the positioning pin 201 and is located at the rear end of the I-shaped wheel 202; the adapter groove 209 is fixedly mounted on the outer wall of the positioning pin 201 and is located at the rear end of the I-shaped wheel 202; the adapter groove 209 is fixedly mounted on the back of the vortex spring 204; the adapter groove 209 is fixedly mounted on the back of the vortex spring 204; the adapter groove 209 is fixedly mounted on the back of the vortex spring 204; the adapter groove 209 is fixedly mounted on the back of the vortex spring It is opened on the inner wall of the back plate 208; the friction reduction ring 2010 is rotatably installed inside the adapter groove 209; the slider 2015 is slidably installed inside the slide rail 205; the brake shoe 2016 is fixedly installed on the side of the slider 2 2015 away from the slider 1 206. The inspection personnel will fix the detector 100 on the outside of the weak-current box. According to the specific use requirements, the detection line will be pulled and unwound along the inside of the I-shaped wheel 202, thereby releasing the length of the detection line to the outside of the detector 100 for easy detection. When the detection line is pulled out to a length that meets the use requirements, the inspector will hold two detection probes to detect the weak-current units inside the weak-current box.

[0050] For further details, please refer to Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 and Figure 8 As shown:

[0051] The two ends of the vortex spring 204 are respectively clamped on the outer wall of the positioning pin 201 and the inner wall of the placement circular cavity 203. There are two slide rails 205, and the two slide rails 205 are symmetrically distributed about the center of the I-shaped wheel 202. The slider 2015 is located on the side of the slider 1 206 away from the center of the I-shaped wheel 202. An arch spring 2017 is fixedly installed between the slider 1 206 and the slider 2 2015. The end curvature of the brake shoe 2016 coincides with the curvature of the inner wall of the friction reduction ring 2010. The front of the friction reduction ring 2010 is provided with a plurality of positioning grooves 2012 distributed at equal angles. The positioning grooves 2012 are located on the periphery of the adapter groove 209, and the interior of the positioning grooves 2012 is connected to the interior of the adapter groove 209. A fixing block 2013 is fixedly installed inside the positioning grooves 2012. The fixing block 2013 is close to the transfer groove 209. A spring 2014 is fixedly installed on one side of the connecting groove 209, a ratchet 2011 is fixedly installed on the front half of the outer wall of the friction reduction ring 2010, and the ratchet 2011 is unidirectionally meshed with the spring 2014. A ratchet 2019 is provided on the rear part of the outer wall of the I-wheel 202, and the opening direction of the ratchet 2019 is the same as that of the ratchet 2011. A guide block 2020 is fixedly installed on the inner wall of the back side of the detector 100, and a pawl 2021 is slidably installed inside the guide block 2020, and the pawl 2021 is unidirectionally meshed with the ratchet 2019. A square groove 2022 is provided inside the pawl 2021, and a spring 2023 is fixedly installed inside the square groove 2022. The spring 2023 is fixedly installed between the left inner wall of the square groove 2022 and the left side of the guide block 2020.

[0052] Specifically, when the inspector pulls the test line outward, the test line pulls the I-shaped wheel 202 in a clockwise direction. At the same time, the vortex spring 204 undergoes elastic deformation, which creates a counterclockwise reset potential energy for the I-shaped wheel 202. During the clockwise rotation of the I-shaped wheel 202, the bite action of the pawl 2021 and the ratchet 1 2019 makes it impossible for the rebound force of the vortex spring 204 to drive the I-shaped wheel 202 to reverse, so that the released test line will not be wound around the inside of the I-shaped wheel 202 again. When the weak current test is completed, the inspector moves closer to the tester 1. 00, press the top of the pry bar 2026 in the direction of the second positioning pin 2025 to rotate it counterclockwise. Since the bottom of the pry bar 2026 is slidingly connected to the U-shaped groove 2024, the counterclockwise rotation of the pry bar 2026 will move the pawl 2021 along the inside of the guide block 2020 in the direction away from the I-shaped wheel 202. At the same time, the spring 1 2023 is compressed and stored. After the pawl 2021 moves, it releases the engagement with the ratchet 1 2019. The rebound force of the vortex spring 204 is released to drive the I-shaped wheel 202 to rotate counterclockwise, and the detection line is wound again.

[0053] For further details, please refer to Figure 7 、 Figure 8 As shown:

[0054] The back of the back plate 208 is provided with two spiral grooves 2018 distributed at equal angles. The spiral direction of the spiral grooves 2018 matches the direction of the ratchet teeth of the ratchet wheel 211. The outer walls of the two arch springs 2017 are slidably connected to the inner walls of the two spiral grooves 2018 respectively.

[0055] A U-shaped groove 2024 is provided at the top right end of the pawl 2021, and a positioning pin 2025 is fixedly installed on the inner wall of the back side of the detector 100. A pry bar 2026 is installed on the outer wall of the positioning pin 2025. The bottom of the pry bar 2026 is slidably installed inside the U-shaped groove 2024, and the top of the pry bar 2026 is movably extended to the outer periphery of the right side of the detector 100.

[0056] Specifically, when the pulling detection line drives the I-wheel 202 to rotate clockwise, the I-wheel 202 also drives the two slide rails 205 to rotate together, causing the two sliders 1 206, the two sliders 2015 and the two brake shoes 2016 that are slidably connected to the slide rails 205 to rotate together, and the two sliders 1 206 also drive the two dial rods 207 to move spirally along the inner wall seats of the two spiral grooves 2018 as the slide rails 205 rotate, further generating a thrust on the slider 1 206 away from the center of the I-wheel 202, causing the two sliders 1 206 to move away from each other along the two slide rails 205, and not driving the two sliders 2 2015 and the two brake shoes 2016 to move together under the elastic connection action of the two arch springs 2017, causing the ends of the two brake shoes 2016 to gradually approach the inner wall of the friction reduction ring 2010 until they abut against each other. The shoe 2016 and the two sliders 2015 are stopped by the inner wall of the friction reduction ring 2010 and stop moving. At this time, the lever 207 continues to move spirally along the inner seat of the spiral groove 2018, and continues to push the slider 1 206, causing the arch spring 2017 to be compressed and accumulate force. At this time, the pressure between the end of the brake shoe 2016 and the inner wall of the friction reduction ring 2010 increases, and the friction between the two also increases. Then, the brake shoe 2016 drives the friction reduction ring 2010 to rotate clockwise along the inside of the adapter groove 209 as the slider 2 2015 rotates. It should be noted that when the friction reduction ring 2010 rotates clockwise and drives the ratchet 2011 to rotate together, the ratchet teeth of the ratchet 2011 will not engage with the end of the spring piece 1 2014, so the spring piece 1 2014 will not interfere with the clockwise rotation of the ratchet 2011 and the friction reduction ring 2010.

[0057] When the weak current test is completed, the inspector presses the top of the pry bar 2026 in the direction close to the detector 100, so that it rotates counterclockwise along the positioning pin 2025. Since the bottom of the pry bar 2026 is slidably connected to the U-shaped groove 2024, the counterclockwise rotation of the pry bar 2026 will move the pawl 2021 along the inside of the guide block 2020 in the direction away from the I-shaped wheel 202. At the same time, the spring 1 2023 is compressed and stored. After the pawl 2021 moves, it releases the bite with the ratchet 1 2019, and the rebound force of the vortex spring 204 is released to drive the I-shaped wheel. The wheel 202 rotates counterclockwise to reel the detection line again. During this period, the I-shaped wheel 202 drives the two vortex springs 204 to rotate counterclockwise, and then drives the two sliders 1 206, the two sliders 2015, the two brake shoes 2016 and the two arch springs 2017 to rotate counterclockwise. At this time, due to the bite effect of the shrapnel 1 2014 and the ratchet 2011, the brake shoe 2016 cannot be brought into rotation by the friction between the end of the brake shoe 2016 and the inner wall of the friction reduction ring 2010 during the counterclockwise rotation of the slider 2 2015. The dynamic friction reduction ring 2010 rotates counterclockwise, so the end of the brake shoe 2016 slides and rubs along the inner wall of the friction reduction ring 2010. Therefore, the rebound force of the vortex spring 204 cannot quickly drive the I-shaped wheel 202 to rotate counterclockwise and reset, avoiding the detection line from breaking due to the excessive speed of the I-shaped wheel 202. In addition, the slider 1 206 drives the lever 207 to move in the opposite spiral direction along the spiral groove 2018 during the rotation of the slide rail 205, so that the slider 1 206 moves toward the center of the I-shaped wheel 202, and the arch spring 2017 gradually rebounds. Therefore, the elastic thrust on the slider 2 2015 and the brake shoe 2016 gradually decreases, that is, as the resilience of the vortex spring 204 is gradually released, the elasticity of the vortex spring 204 gradually weakens, and the elastic thrust on the slider 2 2015 through the arch spring 2017 is weakened, that is, the pressure between the end of the brake shoe 2016 and the friction reduction ring 2010 is weakened, and the friction between the two is reduced, so that the rebound force of the vortex spring 204 always corresponds to the size of the rebound force, ensuring the uniform rotation of the I-shaped wheel 202, and at the same time, ensuring that the rebound force of the vortex spring 204 can be effectively released.

[0058] For further details, please refer to Figure 11 、 Figure 12 As shown:

[0059] The combing unit 300 includes an axle pin 301. Two axle pins 301 distributed up and down are fixedly installed on the inner wall of the back of the detector 100. Combing rubber wheels 302 are rotatably installed on the outer walls of the two axle pins 301. Pulleys 303 are fixedly installed on the outer walls of the axle pins 301. The pulleys 303 are located on the back of the combing rubber wheels 302. The outer peripheries of the upper and lower pulleys 303 are commonly connected with belts 304. The belts 304 are twisted in opposite directions. The outer wall of the axle pin 301 located at the bottom is fixed with a combing rubber wheel 302. A transmission wheel 305 is fixedly installed, and the transmission wheel 305 is located between the combing rubber wheel 302 and the pulley 303. A plurality of spring pieces 306 distributed at equal angles are fixedly installed on the outer wall of the transmission wheel 305, and the end of the spring piece 306 abuts against the ratchet 1 2019. A baffle 307 is fixedly installed on the inner wall of the back side of the detector 100, and the surface of the baffle 307 abuts against the end of one of the spring pieces 306 located at the bottom of the transmission wheel 305. The ends of the combing rubber wheel 302 are all provided with grooves 3002.

[0060] The cam 302 of the second gear 203 is rotated by the spring 204, and the cam 302 of the second gear 203 is rotated by the spring 204.

[0061] When the safety detection device for weak current engineering of this solution is in operation, the detection personnel will fix the detection instrument 100 on the outside of the weak current box, and according to the specific use requirements, pull the detection line and unwind it along the inside of the I-shaped wheel 202, thereby releasing the length of the detection line to the outside of the detection instrument 100 for easy detection. When the detection line is pulled out to a length sufficient for use, the detection personnel will hold two detection probes in their hands to detect the weak current units inside the weak current box;

[0062] It should be noted that when the inspector pulls the test line outward, the test line pulls the spool 202 in a clockwise direction. At the same time, the vortex spring 204 undergoes elastic deformation, which creates a counterclockwise reset potential energy for the spool 202. During the clockwise rotation of the spool 202, the engagement of the pawl 2021 with the ratchet 1 2019 prevents the rebound force of the vortex spring 204 from driving the spool 202 in reverse direction, so that the released test line will not be wound around the inside of the spool 202 again.

[0063] At the same time, the clockwise rotation of the I-wheel 202 also drives the two slide rails 205 to rotate together, causing the two sliders 1 206, the two sliders 2015 and the two brake shoes 2016 that are slidably connected to the slide rails 205 to rotate together, and the two sliders 1 206 also drive the two levers 207 to move spirally along the inner wall seats of the two spiral grooves 2018 as the slide rails 205 rotate, further generating a thrust on the slider 1 206 away from the center of the I-wheel 202, prompting the two sliders 1 206 to move away from each other along the two slide rails 205, and under the elastic connection action of the two arch springs 2017, drive the two sliders 2015 and the two brake shoes 2016 to move together, causing the ends of the two brake shoes 2016 to gradually approach the inner wall of the friction reduction ring 2010 until they abut each other. The second slider 2015 is stopped by the inner wall of the friction reduction ring 2010 and stops moving. At this time, the lever 207 continues to move spirally along the inner seat of the spiral groove 2018, and continues to push the slider 1 206, causing the arch spring 2017 to be compressed and accumulate force. At this time, the pressure between the end of the brake shoe 2016 and the inner wall of the friction reduction ring 2010 increases, and the friction between the two also increases. Then, as the slider 2015 rotates, the brake shoe 2016 drives the friction reduction ring 2010 to rotate clockwise along the inside of the adapter groove 209. It should be noted that when the friction reduction ring 2010 rotates clockwise and drives the ratchet 2011 to rotate together, the ratchet teeth of the ratchet 2011 will not engage with the end of the spring piece 1 2014, so the spring piece 1 2014 will not interfere with the clockwise rotation of the ratchet 2011 and the friction reduction ring 2010.

[0064] When the weak current test is completed, the inspector presses the top of the pry bar 2026 in the direction close to the detector 100, so that it rotates counterclockwise along the positioning pin 2025. Since the bottom of the pry bar 2026 is slidably connected to the U-shaped groove 2024, the counterclockwise rotation of the pry bar 2026 will move the pawl 2021 along the inside of the guide block 2020 in the direction away from the I-shaped wheel 202. At the same time, the spring 1 2023 is compressed and stored. After the pawl 2021 moves, it releases the bite with the ratchet 1 2019, and the rebound force of the vortex spring 204 is released to drive the I-shaped wheel. The wheel 202 rotates counterclockwise to reel the detection line again. During this period, the I-shaped wheel 202 drives the two vortex springs 204 to rotate counterclockwise, and then drives the two sliders 1 206, the two sliders 2015, the two brake shoes 2016 and the two arch springs 2017 to rotate counterclockwise. At this time, due to the bite effect of the shrapnel 1 2014 and the ratchet 2011, the brake shoe 2016 cannot be brought into rotation by the friction between the end of the brake shoe 2016 and the inner wall of the friction reduction ring 2010 during the counterclockwise rotation of the slider 2 2015. The dynamic friction reduction ring 2010 rotates counterclockwise, so the end of the brake shoe 2016 slides and rubs along the inner wall of the friction reduction ring 2010. Therefore, the rebound force of the vortex spring 204 cannot quickly drive the I-shaped wheel 202 to rotate counterclockwise and reset, avoiding the detection line from breaking due to the excessive speed of the I-shaped wheel 202. In addition, the slider 1 206 drives the lever 207 to move in the opposite spiral direction along the spiral groove 2018 during the rotation of the slide rail 205, so that the slider 1 206 moves toward the center of the I-shaped wheel 202, and the arch spring 2017 gradually rebounds. Therefore, the elastic thrust on the second slider 2015 and the brake shoe 2016 gradually decreases. That is to say, as the resilience of the vortex spring 204 is gradually released, the elasticity of the vortex spring 204 gradually weakens, and the elastic thrust on the second slider 2015 by the arch spring 2017 is weakened. That is, the pressure between the end of the brake shoe 2016 and the friction reduction ring 2010 is weakened, and the friction between the two is reduced, so that the magnitude of the resilience of the vortex spring 204 is always corresponding, ensuring the uniform rotation of the I-shaped wheel 202, and at the same time, ensuring that the resilience of the vortex spring 204 can be effectively released;

[0065] When the cam 302 is in the forward direction, the gear 303 of the upper and lower wheels 303 is rotated in the reverse direction, and the gear 303 of the lower and upper wheels 303 is rotated in the reverse direction.

[0066] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A safety detection device for weak current engineering, characterized by: include: Detector (100); The storage unit (200) is fixedly arranged inside the detector (100) and is used for storing the detection line. The storage unit (200) includes: A positioning pin (201) is fixedly mounted on the lower portion of the inner wall of the back side of the detector (100); The I-shaped wheel (202) is rotatably mounted on the outer wall of the positioning pin (201) and has a detection harness for weak current detection wound therein; A circular cavity (203) is arranged on the front side of the spool (202); A vortex spring (204) is fixedly arranged inside the circular cavity (203); A slide rail (205) is fixedly mounted on the back of the vortex spring (204); Slider 1 (206), slidably mounted inside the slide rail (205); A shift rod (207) is fixedly mounted on the back of the slider (206); A back plate (208) is fixedly mounted on the outer wall of the first positioning pin (201) and is located at the rear end of the spool (202); A transfer groove (209) is provided on the inner wall of the back plate (208); A friction reduction ring (2010) is rotatably mounted inside the adapter groove (209); Slider 2 (2015), slidably mounted inside the slide rail (205); The brake shoe (2016) is fixedly mounted on a side of the slider 2 (2015) away from the slider 1 (206).

2. A safety detection device for weak current engineering according to claim 1, characterized in that: The two ends of the vortex spring (204) are respectively clamped on the outer wall of the positioning pin (201) and the inner wall of the placement circular cavity (203); there are two slide rails (205), and the two slide rails (205) are symmetrically distributed about the center of the I-shaped wheel (202); the slider 2 (2015) is located on the side of the slider 1 (206) away from the center of the I-shaped wheel (202); an arch spring (2017) is fixedly installed between the slider 1 (206) and the slider 2 (2015); the end curvature of the brake shoe (2016) is consistent with the curvature of the inner wall of the friction reduction ring (2010).

3. A safety detection device for weak current engineering according to claim 2, characterized in that: The front face of the friction deceleration ring (2010) is provided with a plurality of positioning grooves (2012) distributed at equal angles, the positioning grooves (2012) are located on the periphery of the adapter groove (209), and the interior of the positioning grooves (2012) is communicated with the interior of the adapter groove (209), a fixing block (2013) is fixedly installed inside each of the positioning grooves (2012), a spring piece 1 (2014) is fixedly installed on a side of each of the fixing blocks (2013) close to the adapter groove (209), a ratchet (2011) is fixedly installed on the front half of the outer wall of the friction deceleration ring (2010), and the ratchet (2011) is in one-way meshing with the spring piece 1 (2014).

4. A safety detection device for weak current engineering according to claim 3, characterized in that: The back of the back plate (208) is provided with two spiral grooves (2018) distributed at equal angles, the spiral direction of the spiral grooves (2018) is adapted to the direction in which the ratchet teeth of the ratchet wheel (2011) are provided, and the outer walls of the two arch springs (2017) are respectively slidably connected to the inner walls of the two spiral grooves (2018).

5. A safety detection device for weak current engineering according to claim 4, characterized in that: A ratchet (2019) is provided on the rear portion of the outer wall of the I-shaped wheel (202), and the direction in which the ratchet (2019) is provided is the same as the direction in which the ratchet of the ratchet (2011) is provided. A guide block (2020) is fixedly installed on the inner wall of the back side of the detector (100), and a ratchet (2021) is slidably installed inside the guide block (2020), and the ratchet (2021) is unidirectionally meshed with the ratchet (219). A square groove (2022) is provided inside the ratchet (2021), and a spring (2023) is fixedly installed inside the square groove (2022), and the spring (2023) is fixedly installed between the left inner wall of the square groove (2022) and the left side of the guide block (2020).

6. A safety detection device for weak current engineering according to claim 5, characterized in that: A U-shaped groove (2024) is provided at the top right end of the pawl (2021), a positioning pin 2 (2025) is fixedly mounted on the inner wall of the back side of the detector (100), a pry bar (2026) is mounted on the outer wall of the positioning pin 2 (2025), the bottom of the pry bar (2026) is slidably mounted inside the U-shaped groove (2024), and the top of the pry bar (2026) is movably extended to the outer periphery of the right side of the detector (100).

7. A safety detection device for weak current engineering according to claim 6, characterized in that: The invention also comprises a combing unit (300), wherein the combing unit (300) comprises an axle pin (301), and two axle pins (301) distributed up and down are fixedly mounted on the inner wall of the back of the detector (100), and a combing rubber wheel (302) is rotatably mounted on the outer wall of the two axle pins (301), and a pulley (303) is fixedly mounted on the outer wall of the axle pin (301), and the pulley (303) is located on the back of the combing rubber wheel (302), and a belt (304) is commonly sleeved on the outer periphery of the upper and lower pulleys (303), and the belt (304) is twisted in opposite directions.

8. A safety detection device for weak current engineering according to claim 7, characterized in that: A transmission wheel (305) is fixedly mounted on the outer wall of one of the shaft pins (301) located at the bottom. The transmission wheel (305) is located between the combing rubber wheel (302) and the pulley (303). A plurality of spring pieces (306) distributed at equal angles are fixedly mounted on the outer wall of the transmission wheel (305). The end of the spring piece (306) abuts against the ratchet (2019).

9. A safety detection device for weak current engineering according to claim 8, characterized in that: A blocking bar (307) is fixedly mounted on the inner wall of the back side of the detector (100), and the surface of the blocking bar (307) abuts against the end of one of the two spring pieces (306) located at the bottom of the transmission wheel (305).

10. A safety detection device for weak current engineering according to claim 9, characterized in that: The ends of the combing rubber wheels (302) are each provided with grooves (3002).

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