A self-retracting security lens that prevents abnormal damage

Abstract

The present invention belongs to the technical field of security monitoring, and in particular, relates to a self-retracting security lens that prevents abnormal damage, including a fixed lens barrel and a movable lens barrel, and a flexible sleeve is provided between the fixed lens barrel and the movable lens barrel, and a lens assembly is provided inside the fixed lens barrel and the movable lens barrel, and also includes: a support cover, the support cover fixed sleeve is arranged on the outside of the fixed lens barrel, and the support cover is hemispherical, and a single-chip microcomputer is arranged on the inside of the support cover; an installation sleeve is arranged on the outside of the movable lens barrel, and the outer wall of the installation sleeve is provided with an arc surface, and the installation sleeve is arranged on the inside of the support cover by rotating the arc surface, and the installation sleeve and the support cover are jointly installed with a start trigger unit. The present invention can unload and buffer the external force when the lens end is acted upon by an external force, and can respond quickly, and actively retract the lens quickly, with good protection effect.

Description

Technical Field

[0001] The invention belongs to the technical field of security monitoring, and in particular relates to a self-retracting security lens capable of preventing abnormal damage. Background Art

[0002] Security monitoring is one of the core technologies of modern security systems. It uses optical lenses, image sensors and data transmission and processing systems to collect real-time images and convert information in the monitored area, providing a strong basis for security management and event tracing, and effectively improving the effectiveness of security warning and emergency response.

[0003] At present, security monitoring mainly includes a body and a lens. The body is equipped with circuit boards and other devices, while the lens mainly includes a lens assembly and a lens. The lens assembly is responsible for capturing images and is controlled by the circuit board in the body. It can be flexibly adjusted and used according to monitoring needs. Since the lens assembly is an optical element and is easily damaged, a special protective structure needs to be set up to improve its protection. For example, the invention patent with publication number CN118433500A discloses a self-retracting security lens that can prevent abnormal damage.

[0004] Although the security lens disclosed in the above patent can protect the lens inside when subjected to external force, it adopts a snap-on structure and needs to be manually reset before it can be used again after a single protection. The security lens is generally installed at a high place, which increases the complexity of resetting and reuse. In addition, it requires a sufficiently large external force to release the snap-on structure to complete the protection of the lens. The response speed is poor and it may become stuck. At the same time, its overall size is large, which affects the concealment of the security lens to a certain extent. Summary of the invention

[0005] The object of the present invention is to provide a self-retracting security lens that is resistant to abnormal damage in view of the above-mentioned problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a self-retracting security lens that prevents abnormal damage, comprising a fixed lens barrel and a movable lens barrel, wherein a flexible sleeve is arranged between the fixed lens barrel and the movable lens barrel, wherein lens assemblies are arranged inside the fixed lens barrel and the movable lens barrel, and further comprising:

[0007] A support cover, which is fixedly sleeved on the outside of the fixed lens barrel and is hemispherical in shape, and a single chip microcomputer is arranged on the inside of the support cover;

[0008] A mounting sleeve, which is sleeved on the outer side of the movable lens barrel, the outer side wall of the mounting sleeve is provided with an arc surface, and the mounting sleeve is rotatably arranged on the inner side of the support cover through the arc surface, and the mounting sleeve and the support cover are jointly provided with a start trigger unit;

[0009] A conical outer sleeve is integrally formed and sleeved on the outer side wall of the fixed lens barrel, and the mounting sleeve is installed with an elastic support component and connected to the conical outer sleeve through the elastic support component;

[0010] Two fixed plates are symmetrically arranged on both sides of the conical outer sleeve. The two fixed plates have storage grooves at the ends facing each other, and the insides of the two storage grooves are slidably connected with protective cover plates. A magnetic push unit is provided on the inner side of the storage groove. The single-chip microcomputer controls the operation of the magnetic push unit according to the electrical signal output by the start trigger unit.

[0011] Preferably, the start trigger unit includes two mounting grooves opened on the top of the outer wall of the mounting sleeve, and lamp posts are fixedly installed inside the two mounting grooves, and two photoelectric switches are fixedly plugged into the inner wall of the support cover, and the positions of the two photoelectric switches are set directly above the corresponding lamp posts, and the two photoelectric switches and the two lamp posts are electrically connected to the single-chip computer.

[0012] Preferably, the elastic support assembly includes a support ring integrally formed on the inner wall of the mounting sleeve, and the support ring is arranged at one end of the mounting sleeve away from the conical sleeve, a support spring is fixed between the support ring and the conical sleeve, and the single-chip computer is installed on the side wall of the support ring.

[0013] Preferably, the two magnetic push units each include a groove opened on the side wall of the protective cover plate, a permanent magnet is arranged inside the groove, a pad is fixedly installed at the bottom of the storage groove, and an electromagnet is fixedly installed at the end of the pad, the electromagnet corresponds to the position of the permanent magnet, and the electromagnet is electrically connected to the single-chip computer, two circular grooves are opened on the end face of the protective cover plate, and a reset spring is fixedly arranged between the bottom of the two circular grooves and the bottom of the storage groove, the single-chip computer controls the operation of the two electromagnets according to the electrical signals output by the two photoelectric switches, and a gas producing mechanism is arranged inside the groove.

[0014] Preferably, the two gas production mechanisms both include an air groove opened at the bottom of the groove, and a piston block is slidably connected inside the air groove, a support rod is installed on the end face of the piston block, and a magnetic isolation block is fixedly connected to the end of the support rod away from the piston block, the permanent magnet is fixedly connected to the magnetic isolation block, a one-way air inlet and a one-way air outlet are opened on the groove wall of the air groove at a position on the side of the piston block away from the support rod, and one-way valves are installed inside the one-way air inlet and the one-way air outlet, an elastic part is provided between the bottom of the groove and the magnetic isolation block, an exhaust assembly is provided inside the protective cover plate and the storage groove, and an air intake dust filter assembly is provided on the groove wall of the storage groove.

[0015] Preferably, the two exhaust components each include a strip cavity opened inside the protective cover plate, and the strip cavity is connected to the one-way air outlet, a first exhaust hole is opened on the cavity wall of the strip cavity, two rubber sealing frames are fixedly installed on the groove wall of the storage groove, and the protective cover plate is slidably connected to the two rubber sealing frames, the rubber sealing frames and the protective cover plate separate the storage groove into an air outlet channel and an air inlet channel, the first exhaust hole is connected to the air outlet channel, a discharge groove is opened on the side wall of the air outlet channel, and an air outlet hose is fixedly inserted on the groove wall of the discharge groove, an annular air outlet cavity is opened inside the support cover, and the annular air outlet cavity is connected to the air outlet hose, and a plurality of jet holes are opened on the cavity wall of the annular air outlet cavity away from the air outlet hose.

[0016] Preferably, the air intake dust filter assembly includes an air inlet hole opened at the bottom of the storage groove, and an arc-shaped filter is fixedly installed inside the air inlet hole, and the air inlet hole is connected to the one-way air inlet hole through an air intake channel.

[0017] Preferably, a second exhaust hole is provided in the cavity wall of the strip cavity, a normally open solenoid valve is provided inside the first exhaust hole, a normally closed solenoid valve is provided inside the second exhaust hole, an annular air inlet cavity is provided inside the conical outer sleeve, and a circular hole corresponding to the position of the second exhaust hole is provided on the outer cavity wall of the annular air inlet cavity, and a conical rubber sleeve corresponding to the position of the circular hole is fixedly installed on the outer wall of the conical outer sleeve, and the circular hole is connected with the annular air inlet cavity through the conical rubber sleeve, a plurality of cleaning holes are provided in the cavity wall of the annular air inlet cavity, and the air outlet end of each cleaning hole is arranged at the outermost side of the lens assembly, and the single-chip microcomputer controls the timed start of the normally open solenoid valve and the normally closed solenoid valve.

[0018] Preferably, two push rods are fixedly installed on the end faces of the two magnetic isolation blocks, and elastic telescopic rods are fixedly installed on the end faces of the two cushion blocks. The movable ends of the two elastic telescopic rods on the same side are commonly fixedly connected to the same arc strip, and the outer wall of the arc strip is provided with bristles, which can clean and discharge dust blocked inside the mesh of the arc filter, and the push rod will push out the movable end of the elastic telescopic rod when it moves.

[0019] Compared with the prior art, the advantages of the self-retracting security lens that prevents abnormal damage of the present invention are:

[0020] 1. Through the cooperation of the fixed lens barrel, movable lens barrel, flexible sleeve and lens assembly, image capture can be performed, and through the cooperation of the support cover, single-chip microcomputer, mounting sleeve and elastic support assembly, when the lens end is subjected to external force, the external force can be unloaded and buffered. In addition, the start trigger unit, conical outer sleeve, elastic support assembly, fixed plate, storage slot, protective cover and magnetic push unit can be used to immediately and actively retract the lens when the lens end is subjected to external force. The response speed is fast, it is not easy to get stuck, the protection effect is good, and it is convenient to quickly restore the image capture function of the security lens later.

[0021] 2. Through the gas-generating mechanism, when the security lens is in normal use, the magnetic push unit can be used in conjunction with the protective cover to generate airflow, thereby assisting the security lens body to quickly dissipate heat and cool down, thereby enriching the functionality of the security lens.

[0022] 3. Through the cooperation of the second exhaust hole, the normally open solenoid valve, the normally closed solenoid valve, the annular air inlet cavity, the round hole, the conical rubber sleeve and the cleaning hole, the dust on the surface of the lens assembly of the security lens can be automatically cleaned regularly, thereby preventing dust and other impurities from adhering to the surface of the lens assembly and affecting the clarity of image capture. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic structural diagram of a self-retractable security lens that is resistant to abnormal damage.

[0024] Figure 2 The present invention is a schematic cross-sectional structural diagram of a self-retractable security lens that is resistant to abnormal damage.

[0025] Figure 3 The present invention is a schematic diagram of the three-dimensional structure of the connection between a movable lens barrel and a supporting sleeve of a self-retractable security lens that can prevent abnormal damage.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of a single fixing plate of a self-retracting security lens that is resistant to abnormal damage provided by the present invention.

[0027] Figure 5 yes Figure 2 A magnified view of the structure of part A.

[0028] Figure 6 The invention is a schematic diagram of the internal structure of a fixing plate of a self-retractable security lens that is resistant to abnormal damage.

[0029] Figure 7 yes Figure 6 A magnified view of the structure of part B.

[0030] Figure 8 yes Figure 2A magnified view of the structure of part C.

[0031] In the figure: 1 fixed lens barrel, 2 movable lens barrel, 3 lens assembly, 4 support cover, 5 single chip microcomputer, 6 mounting sleeve, 7 start trigger unit, 71 mounting groove, 72 lamp post, 73 photoelectric switch, 8 conical jacket, 9 elastic support assembly, 91 support ring, 92 support spring, 10 fixed plate, 11 storage groove, 12 protective cover, 13 magnetic push unit, 131 groove, 132 permanent magnet, 133 pad, 134 electromagnet, 135 circular groove, 136 reset spring, 14 gas production mechanism, 141 gas groove, 142 piston block, 143 support rod, 144 magnetic isolation block, 145 one-way air inlet, 14 6 one-way air outlet, 147 one-way valve, 148 elastic member, 15 exhaust assembly, 151 strip cavity, 152 first exhaust hole, 153 rubber sealing frame, 154 outlet channel, 155 inlet channel, 156 discharge groove, 157 outlet hose, 158 annular outlet cavity, 159 jet hole, 16 air inlet dust filter assembly, 161 air inlet hole, 162 arc filter, 17 second exhaust hole, 18 normally open solenoid valve, 19 normally closed solenoid valve, 20 round hole, 21 annular air inlet cavity, 22 conical rubber sleeve, 23 cleaning hole, 24 push rod, 25 elastic telescopic rod, 26 arc strip, 27 bristles. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] like Figures 1 to 8As shown, a self-retracting security lens for preventing abnormal damage includes a fixed lens barrel 1 and a movable lens barrel 2, and a flexible sleeve is provided between the fixed lens barrel 1 and the movable lens barrel 2, and a lens assembly 3 is provided inside the fixed lens barrel 1 and the movable lens barrel 2; it also includes: a support cover 4, the support cover 4 is fixedly sleeved on the outside of the fixed lens barrel 1, and the support cover 4 is hemispherical, a single-chip computer 5 is provided on the inside of the support cover 4, a mounting sleeve 6 is sleeved on the outside of the movable lens barrel 2, an outer wall of the mounting sleeve 6 is provided with an arc surface, and the mounting sleeve 6 is rotatably arranged on the inner side of the support cover 4 through the arc surface, and a start trigger unit 7 is installed together with the support cover 4, and the start trigger unit 7 includes two mounting grooves 71 opened on the top of the outer wall of the mounting sleeve 6, and the insides of the two mounting grooves 71 are fixedly installed with The lamp post 72 and the inner wall of the support cover 4 are fixedly connected with two photoelectric switches 73, and the positions of the two photoelectric switches 73 are both set directly above the corresponding lamp posts 72. The two photoelectric switches 73 and the two lamp posts 72 are electrically connected to the single-chip microcomputer 5. After the photoelectric switches 73 receive the light from the lamp posts 72, they will convert the optical signal into an electrical signal and output it to the single-chip microcomputer 5. A soft sealing sleeve is provided between the outer wall of the mounting sleeve 6 and the support cover 4 to prevent external impurities from entering the gap between the mounting sleeve 6 and the support cover 4. A damping pad is provided between the mounting sleeve 6 and the support cover 4 to prevent the lens end from shaking at will and ensure the stability of the lens end under normal working conditions. Secondly, a counterweight block is provided on the inner wall of the mounting sleeve 6 to automatically reset the mounting sleeve 6 after an external force is applied.

[0034] Among them, the conical sleeve 8 is integrally formed and sleeved on the outer wall of the fixed lens barrel 1, the mounting sleeve 6 is installed with an elastic support component 9, and is connected to the conical sleeve 8 through the elastic support component 9, the elastic support component 9 includes a support ring 91 integrally formed and arranged on the inner wall of the mounting sleeve 6, and the support ring 91 is arranged at one end of the mounting sleeve 6 away from the conical sleeve 8, a support spring 92 is fixed between the support ring 91 and the conical sleeve 8, and the single-chip computer 5 is installed on the side wall of the support ring 91.

[0035] Among them, the two fixing plates 10 are symmetrically arranged on both sides of the conical outer sleeve 8, and the two fixing plates 10 have a storage groove 11 at one end facing each other, and the inside of the two storage grooves 11 are slidably connected with a protective cover plate 12, and a magnetic push unit 13 is arranged on the inner side of the storage groove 11. The single-chip microcomputer 5 controls the magnetic push unit 13 to work according to the electrical signal output by the start trigger unit 7. The two magnetic push units 13 include a groove 131 opened on the side wall of the protective cover plate 12, and a permanent magnet 132 is arranged inside the groove 131. The bottom of the storage groove 11 is fixed A pad block 133 is fixedly installed, and an electromagnet 134 is fixedly installed at the end of the pad block 133. The position of the electromagnet 134 corresponds to that of the permanent magnet 132, and the electromagnet 134 is electrically connected to the single-chip microcomputer 5. Two circular grooves 135 are provided on the end face of the protective cover 12, and a reset spring 136 is fixedly provided between the bottom of the two circular grooves 135 and the bottom of the storage groove 11. The single-chip microcomputer 5 controls the operation of the two electromagnets 134 according to the electrical signals output by the two photoelectric switches 73, and a gas producing mechanism 14 is provided inside the groove 131.

[0036] The two gas production mechanisms 14 each include an air groove 141 provided at the bottom of the groove 131, and a piston block 142 is slidably connected to the interior of the air groove 141, a support rod 143 is installed on the end surface of the piston block 142, and a magnetic isolation block 144 is fixedly connected to the end of the support rod 143 away from the piston block 142, the permanent magnet 132 is fixedly connected to the magnetic isolation block 144, and a one-way inlet is provided on the groove wall of the air groove 141 at a position on the side of the piston block 142 away from the support rod 143. The air hole 145 and the one-way air outlet hole 146, and the one-way air inlet hole 145 and the one-way air outlet hole 146 are both installed with a one-way valve 147, an elastic member 148 is provided between the bottom of the groove 131 and the magnetic isolation block 144, an exhaust assembly 15 is provided inside the protective cover plate 12 and the storage groove 11, and an air intake dust filter assembly 16 is provided on the groove wall of the storage groove 11, and the one-way valve 147 can ensure that the airflow enters along the one-way air inlet hole 145 and is discharged through the one-way air outlet hole 146.

[0037] The two exhaust components 15 each include a strip cavity 151 opened inside the protective cover plate 12, and the strip cavity 151 is connected to the one-way air outlet 146, a first exhaust hole 152 is opened on the cavity wall of the strip cavity 151, two rubber sealing frames 153 are fixedly installed on the groove wall of the storage groove 11, and the protective cover plate 12 is slidably connected to the two rubber sealing frames 153, the rubber sealing frame 153 and the protective cover plate 12 separate the storage groove 11 into an outlet channel 154 and an inlet channel 155, and the first exhaust hole 152 is connected to the outlet channel 154 and the inlet channel 155. The channel 154 is connected, a discharge groove 156 is provided on the side wall of the air outlet channel 154, and an air outlet hose 157 is fixedly inserted into the groove wall of the discharge groove 156, an annular air outlet cavity 158 is provided inside the support cover 4, and the annular air outlet cavity 158 is connected to the air outlet hose 157, and a plurality of jet holes 159 are provided on the cavity wall of the annular air outlet cavity 158 away from the side of the air outlet hose 157, and the rubber sealing frame 153 can prevent the airflow discharged through the first exhaust hole 152 from flowing out from the gap between the protective cover plate 12 and the storage groove 11.

[0038] Among them, the air intake dust filter assembly 16 includes an air inlet hole 161 opened at the bottom of the storage groove 11, and an arc filter 162 is fixedly installed inside the air inlet hole 161. The air inlet hole 161 is connected to the one-way air inlet hole 145 through the air intake channel 155. The arc filter 162 can intercept dust in the airflow.

[0039] Among them, a second exhaust hole 17 is opened on the cavity wall of the strip cavity 151, a normally open solenoid valve 18 is arranged inside the first exhaust hole 152, a normally closed solenoid valve 19 is arranged inside the second exhaust hole 17, an annular air inlet cavity 21 is opened inside the conical sleeve 8, and a circular hole 20 corresponding to the position of the second exhaust hole 17 is opened on the outer cavity wall of the annular air inlet cavity 21, and a conical rubber sleeve 22 corresponding to the position of the circular hole 20 is fixedly installed on the outer wall of the conical sleeve 8, and the circular hole 20 is connected with the annular air inlet cavity 21 through the conical rubber sleeve 22, a plurality of cleaning holes 23 are opened on the cavity wall of the annular air inlet cavity 21, and the air outlet ends of each cleaning hole 23 are arranged on the outermost side of the lens assembly 3, the single chip computer 5 controls the normally open solenoid valve 18 and the normally closed solenoid valve 19 to start at a fixed time, and the conical rubber sleeve 22 can prevent the airflow from being discharged from the gap between the conical sleeve 8 and the protective cover plate 12.

[0040] Among them, two push rods 24 are fixedly installed on the end faces of the two magnetic isolation blocks 144, and elastic telescopic rods 25 are fixedly installed on the end faces of the two cushion blocks 133. The movable ends of the two elastic telescopic rods 25 on the same side are commonly fixedly connected to the same arc strip 26, and the outer wall of the arc strip 26 is provided with bristles 27. The bristles 27 can clean and discharge the dust blocked in the mesh of the arc filter 162. When the push rod 24 moves, the movable end of the elastic telescopic rod 25 will be pushed out. The elastic telescopic rod 25 includes components such as a circular sleeve, a movable rod, a movable part, and an elastic element. The movable rod is located in a sliding arrangement inside the circular sleeve, and the movable part is fixedly sleeved on the outside of the movable rod. The movable part is connected to the circular sleeve through an elastic element.

[0041] The operating principle of the present invention is described as follows: the entire security lens is mounted on the security monitoring body by fixing the lens barrel 1, the power supply connector on the security lens (set on the outside of the fixed lens barrel 1) is connected to the circuit board interface in the security monitoring body, or the power supply connector is directly connected to the external power supply line to power the single-chip microcomputer 5, and the single-chip microcomputer 5 will start working immediately after being powered on;

[0042] The single chip microcomputer 5 will control the two lamp posts 72 to start working, and the lamp posts 72 will emit light to illuminate the photoelectric switch 73. After receiving the light, the two photoelectric switches 73 will output electrical signals to the single chip microcomputer 5. The single chip microcomputer 5 will receive the electrical signals of the two photoelectric switches 73 at the same time. When the end of the movable lens barrel 2 is subjected to external force, the movable lens barrel 2 will drive the mounting sleeve 6 to deflect, so that the lamp posts 72 and the photoelectric switch 73 deviate. At this time, the photoelectric switch 73 cannot receive the light, so the electrical signal output by the photoelectric switch 73 to the single chip microcomputer 5 disappears, and the single chip microcomputer 5 will immediately supply power to the two electromagnets 134 through the forward circuit, and the two electromagnets 134 will be turned on. After the electric current is turned on, a magnetic force is generated. Under the effect of like-charges repelling each other, the electromagnet 134 will generate a magnetic repulsive force on the permanent magnet 132. At this time, the two permanent magnets 132 will drive the protective cover plates 12 on the same side to move toward each other. When the two protective cover plates 12 move toward each other, they will squeeze the conical outer sleeve 8, thereby squeezing the conical outer sleeve 8 into the inner side of the mounting sleeve 6, and the two protective cover plates 12 press against each other, so that the lens assembly 3 inside the movable lens barrel 2 can be separated from the outside, thereby protecting the lens assembly 3. When the movable lens barrel 2 is subjected to an external force, as long as the external force is not perpendicular to the surface of the lens assembly 3, the movable lens barrel 2 will be subjected to an inclined force, causing the movable lens barrel 2 to move toward one side. The movable lens barrel 2 can deflect to the side, thereby unloading the force through deflection, reducing the damage of the lens assembly 3 inside the movable lens barrel 2 to the external force. If the external force is perpendicular to the surface of the lens assembly 3 (because the security lens is installed at a high position, the security lens is generally not subject to the external force perpendicular to the surface of the lens assembly 3), the movable lens barrel 2 will buffer the external force to a certain extent through the support spring 92, and can also reduce the damage of the lens assembly 3 to the external force. When the movable lens barrel 2 is subjected to an inclined external force, the electrical signal output by the photoelectric switch 73 to the single-chip computer 5 will disappear immediately, and the electromagnet 134 will work immediately, so the protective cover 12 will immediately produce a closing action, with a fast response speed and no It is easy to get stuck, and when the single-chip microcomputer 5 controls the electromagnet 134 to work, the single-chip microcomputer 5 will synchronously send a prompt message to the remote terminal (such as a mobile phone). After receiving the prompt message, the personnel need to check the cause of the retraction of the movable lens barrel 2 in time. When the environment is confirmed to be safe, the personnel can send a recovery command to the single-chip microcomputer 5 through the remote terminal. At this time, the single-chip microcomputer 5 controls the two electromagnets 134 to cut off the power. After the two electromagnets 134 are cut off, under the action of the reset spring 136, the two protective cover plates 12 will immediately move back and reset, and under the action of the support spring 92, the movable lens barrel 2 will also extend and reset, thereby restoring the function of capturing the on-site image;

[0043] When the security lens is working normally, the single chip microcomputer 5 intermittently supplies power to the two electromagnets 134 through the reverse circuit, and the single power supply is 2 seconds, and the interval time is also 2 seconds. When the electromagnet 134 is supplied with power through the reverse circuit, the magnetic pole of the electromagnet 134 changes, and the electromagnet 134 generates a magnetic attraction to the permanent magnet 132, so that the permanent magnet 132 drives the magnetic isolation block 144 to move in the direction of the electromagnet 134 on the same side, and then the piston block 142 can be pulled to move through the support rod 143, and the piston block When the electromagnet 134 is powered off, the magnetic isolation block 144 drives the piston block 142 to move back. At this time, the air space in the air groove 141 near the one-way air outlet 146 is squeezed, so the air in the air groove 141 is discharged from the one-way air outlet 146 into the strip cavity 151 and discharged through the first exhaust hole 146. 152, the air outlet channel 154, the discharge groove 156, and the air outlet hose 157 discharge the air into the annular air outlet cavity 158, and finally eject it through each jet hole 159, and the ejected air flows to one side of the security monitoring body, thereby increasing the air flow around it, and then assisting the security monitoring body and the lens assembly 3 to dissipate heat and cool down (in order to avoid the electromagnet 134 from doing ineffective heat dissipation in a low temperature environment, a temperature probe can be set on the outside of the support cover 4. When the ambient temperature is detected to be high, the temperature probe is The single chip microcomputer 5 transmits an electrical signal, and the single chip microcomputer 5 controls the electromagnet 134 to perform auxiliary heat dissipation work according to the above steps). When the magnetic isolation block 144 moves upward, it will drive the push rod 24 to move upward synchronously. The push rod 24 can push out the movable end of the elastic telescopic rod 25, so that the arc strip 26 moves to the arc filter 162 on the same side. The bristles 27 on the arc strip 26 pass through the mesh of the arc filter 162 from the inside in the opposite direction, so that the dust attached to the outer surface of the arc filter 162 can be pushed away in the opposite direction to prevent the dust from clogging the arc filter 162.

[0044] Among them, the single chip computer 5 will periodically start the two normally open solenoid valves 18 and the normally closed solenoid valve 19 to work for 3 minutes (the regular time can be adjusted by the remote terminal to the internal timing module of the single chip computer 5, for example, every 2 hours). At this time, the normally open solenoid valve 18 is powered on and closed, and the normally closed solenoid valve 19 is powered on and opened, so the airflow delivered to the inside of the strip cavity 151 will be discharged through the second exhaust hole 17, and the airflow discharged from the second exhaust hole 17 will enter the inside of the annular air inlet cavity 21 through the conical rubber sleeve 22, and finally be discharged through each cleaning hole 23. The airflow discharged from each cleaning hole 23 will flow through the outer surface of the lens assembly 3, so it can drive the dust that may be attached to the outer surface of the lens assembly 3 (wherein, when the personnel want to actively clean the dust on the surface of the lens assembly 3, the personnel can also send a cleaning instruction to the single chip computer 5 through the remote terminal, and the single chip computer 5 randomly controls the normally open solenoid valve 18 and the normally closed solenoid valve 19 to work for 3 minutes);

[0045] When the single-chip microcomputer 5 does not receive the closing electrical signal of the photoelectric switch 73, the single-chip microcomputer 5 will immediately supply power to the electromagnet 134 through the forward circuit. During this period, the single-chip microcomputer 5 will not supply power to the electromagnet 134 through the reverse circuit until personnel send a recovery command to the single-chip microcomputer 5 through the remote terminal, thereby ensuring the continuous protection effect of the lens assembly 3.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-retracting security lens capable of preventing abnormal damage, comprising a fixed lens barrel (1) and a movable lens barrel (2), wherein a flexible sleeve is provided between the fixed lens barrel (1) and the movable lens barrel (2), and a lens assembly (3) is provided inside the fixed lens barrel (1) and the movable lens barrel (2), characterized in that: Also includes: A support cover (4) is fixedly sleeved on the outside of the fixed lens barrel (1), and the support cover (4) is hemispherical, and a single-chip computer (5) is provided on the inside of the support cover (4); A mounting sleeve (6) is sleeved on the outside of the movable lens barrel (2); an outer wall of the mounting sleeve (6) is provided with an arc surface, and the mounting sleeve (6) is rotatably arranged on the inner side of the support cover (4) via the arc surface; a start trigger unit (7) is installed together with the mounting sleeve (6) and the support cover (4); A conical outer sleeve (8) is integrally formed and sleeved on the outer side wall of the fixed lens barrel (1); the mounting sleeve (6) is mounted with an elastic support component (9) and is connected to the conical outer sleeve (8) via the elastic support component (9); Two fixed plates (10) are symmetrically arranged on both sides of the conical outer sleeve (8); a receiving groove (11) is provided at the opposite ends of the two fixed plates (10); and a protective cover plate (12) is slidably connected to the inside of the two receiving grooves (11); a magnetic push unit (13) is provided on the inner side of the receiving groove (11); and the single chip computer (5) controls the operation of the magnetic push unit (13) according to an electrical signal output by the start trigger unit (7); The start trigger unit (7) comprises two mounting grooves (71) provided at the top of the outer wall of the mounting sleeve (6), and lamp posts (72) are fixedly installed inside the two mounting grooves (71); two photoelectric switches (73) are fixedly plugged into the inner wall of the support cover (4), and the positions of the two photoelectric switches (73) are arranged directly above the corresponding lamp posts (72); the two photoelectric switches (73) and the two lamp posts (72) are electrically connected to the single chip computer (5); The two magnetic push units (13) each comprise a groove (131) formed on a side wall of the protective cover (12); a permanent magnet (132) is disposed inside the groove (131); a cushion block (133) is fixedly mounted on the bottom of the storage groove (11); an electromagnet (134) is fixedly mounted on the end of the cushion block (133); the electromagnet (134) corresponds to the position of the permanent magnet (132); and the electromagnet (134) is electrically connected to the single-chip computer (5); two circular grooves (135) are formed on the end surface of the protective cover (12); a return spring (136) is fixedly disposed between the bottom of the two circular grooves (135) and the bottom of the storage groove (11); the single-chip computer (5) controls the operation of the two electromagnets (134) according to electrical signals output by the two photoelectric switches (73); and a gas generating mechanism (14) is disposed inside the groove (131).

2. The self-retractable security lens capable of preventing abnormal damage according to claim 1, characterized in that: The elastic support assembly (9) comprises a support ring (91) integrally formed and arranged on the inner wall of the mounting sleeve (6), and the support ring (91) is arranged at one end of the mounting sleeve (6) away from the conical outer sleeve (8), a support spring (92) is fixedly arranged between the support ring (91) and the conical outer sleeve (8), and the single-chip computer (5) is mounted on the side wall of the support ring (91).

3. The self-retractable security lens capable of preventing abnormal damage according to claim 1, characterized in that: The two gas production mechanisms (14) each comprise an air groove (141) formed at the bottom of the groove (131), and a piston block (142) is slidably connected to the interior of the air groove (141), a support rod (143) is mounted on the end surface of the piston block (142), and a magnetic isolation block (144) is fixedly connected to one end of the support rod (143) away from the piston block (142), the permanent magnet (132) is fixedly connected to the magnetic isolation block (144), and a groove wall of the air groove (141) is located at the piston block (142). A one-way air inlet (145) and a one-way air outlet (146) are provided at a position away from one side of the support rod (143), and a one-way air inlet (145) and a one-way air outlet (146) are installed inside the one-way air inlet (145) and the one-way air outlet (146), an elastic member (148) is provided between the bottom of the groove (131) and the magnetic isolation block (144), an exhaust assembly (15) is provided inside the protective cover plate (12) and the storage groove (11), and an air intake dust filter assembly (16) is provided on the groove wall of the storage groove (11).

4. The self-retractable security lens capable of preventing abnormal damage according to claim 3, characterized in that: The two exhaust assemblies (15) each comprise a strip-shaped cavity (151) formed inside the protective cover plate (12), and the strip-shaped cavity (151) is connected to the one-way air outlet hole (146). The cavity wall of the strip-shaped cavity (151) is provided with a first air outlet hole (152). The groove wall of the storage groove (11) is fixedly provided with two rubber sealing frames (153), and the protective cover plate (12) is slidably connected to the two rubber sealing frames (153). The rubber sealing frames (153) and the protective cover plate (12) separate the storage groove (11) to form an air outlet channel (146). 54) and an air inlet channel (155), the first exhaust hole (152) is connected to the air outlet channel (154), a side wall of the air outlet channel (154) is provided with a discharge groove (156), and a gas outlet hose (157) is fixedly plugged into the groove wall of the discharge groove (156), an annular air outlet cavity (158) is provided inside the support cover (4), and the annular air outlet cavity (158) is connected to the air outlet hose (157), and a cavity wall of the annular air outlet cavity (158) away from the air outlet hose (157) is provided with a plurality of air injection holes (159).

5. The self-retractable security lens capable of preventing abnormal damage according to claim 4, characterized in that: The air intake dust filter assembly (16) comprises an air intake hole (161) provided at the bottom of the storage groove (11), and an arc-shaped filter screen (162) is fixedly installed inside the air intake hole (161), and the air intake hole (161) is connected to the one-way air intake hole (145) through an air intake channel (155).

6. The self-retractable security lens capable of preventing abnormal damage according to claim 4, characterized in that: The wall of the strip-shaped cavity (151) is provided with a second exhaust hole (17), a normally open solenoid valve (18) is provided inside the first exhaust hole (152), and a normally closed solenoid valve (19) is provided inside the second exhaust hole (17); an annular air inlet cavity (21) is provided inside the conical outer sleeve (8), and a circular hole (20) corresponding to the position of the second exhaust hole (17) is provided on the outer wall of the annular air inlet cavity (21); a conical rubber sleeve (22) corresponding to the position of the circular hole (20) is fixedly mounted on the outer wall of the conical outer sleeve (8), and the circular hole (20) is connected to the annular air inlet cavity (21) through the conical rubber sleeve (22); a plurality of dust cleaning holes (23) are provided on the wall of the annular air inlet cavity (21), and the air outlet end of each dust cleaning hole (23) is arranged at the outermost side of the lens assembly (3); and the single chip computer (5) controls the normally open solenoid valve (18) and the normally closed solenoid valve (19) to start at a fixed time.

7. The self-retractable security lens capable of preventing abnormal damage according to claim 5, characterized in that: Two push rods (24) are fixedly mounted on the end surfaces of the two magnetic isolation blocks (144), and elastic telescopic rods (25) are fixedly mounted on the end surfaces of the two cushion blocks (133). The movable ends of the two elastic telescopic rods (25) on the same side are fixedly connected to the same arc strip (26), and the outer wall of the arc strip (26) is provided with bristles (27). The bristles (27) can clean and discharge dust blocked in the mesh of the arc filter (162). When the push rod (24) moves, the movable end of the elastic telescopic rod (25) is pushed out.

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