阅读说明：本技术 一种能适应不同光照强度的夜视仪 (Night-vision device capable of adapting to different illumination intensities ) 是由 董程 于 2019-11-19 设计创作，主要内容包括：本发明公开的一种能适应不同光照强度的夜视仪,包括夜视仪,所述夜视仪内左侧端面上设有能根据外部光照强度自动调节透光率的光强调节装置,所述夜视仪上侧端面上设有用于将所述夜视仪固定在头盔上的固定架装置,所述固定架装置上设有用于用于锁定所述固定架装置的锁定装置,本发明利用磁性油墨和中空透镜作为遮光透镜,浓度控制机构能通过控制电磁铁吸力,调整磁性油墨中磁性颜料的浓度,从而改变遮光透镜的透光率,利用光敏传感器检测光照强度从而实现自动调节遮光透镜的透光率,从而使增像管夜视仪能在较大光照强度范围内工作,使增像管夜视仪能在较强光照下正常工作。(The invention discloses a night vision device capable of adapting to different illumination intensities, which comprises a night vision device, wherein a light intensity adjusting device capable of automatically adjusting light transmittance according to external illumination intensity is arranged on the inner left end surface of the night vision device, a fixing frame device for fixing the night vision device on a helmet is arranged on the end surface of the upper side of the night vision device, the fixing frame device is provided with a locking device for locking the fixing frame device, the invention utilizes the magnetic ink and the hollow lens as the shading lens, the concentration control mechanism can adjust the concentration of the magnetic pigment in the magnetic ink by controlling the attraction of the electromagnet, thereby changing the light transmittance of the shading lens, detecting the illumination intensity by using the photosensitive sensor to realize the automatic adjustment of the light transmittance of the shading lens, therefore, the image intensifier tube night vision device can work in a larger illumination intensity range, and the image intensifier tube night vision device can work normally under stronger illumination.)

1. The utility model provides a night-time vision device that can adapt to different illumination intensity, includes night-time vision device, its characterized in that: the night vision device is characterized in that a light intensity adjusting device capable of automatically adjusting the light transmittance according to the external illumination intensity is arranged on the end face of the left side in the night vision device, the light intensity adjusting device comprises a light adjusting cylinder which is fixedly connected to the end face of the left side of the night vision device and is communicated with the left side and the right side, a measuring box is fixedly connected to the end face of the upper side of the light adjusting cylinder, a measuring cavity with an opening facing the left side is arranged in the measuring box, a light transmitting plate with a part positioned in the measuring cavity is fixedly connected in the light adjusting cylinder, a liquid storage cavity is arranged in the light transmitting plate, a photosensitive sensor positioned on the right side of the light transmitting plate is fixedly connected in the measuring cavity, an adjusting box is fixedly connected to the end face of the lower side of the light adjusting cylinder, an adjusting cavity is arranged in, the rear end surface of the adjusting pipe is communicated with the upper side end surface of the liquid storage cavity and is connected with a return pipe, the front end surface of the adjusting pipe is communicated with the lower side end surface of the liquid storage cavity and is connected with a liquid conveying pipe, the infusion tube is communicated and connected with a turbine stirrer positioned at the front side of the adjusting tube, the infusion tube is communicated and connected with a liquid supply pump positioned at the front side of the turbine stirrer, two sliding holes are arranged on the inner wall of the light adjusting cylinder, the infusion tube, the adjusting tube, the return tube and the liquid storage cavity are filled with magnetic ink, the light intensity in the measuring cavity is detected through the photosensitive sensor, the strength of the magnetic pigment attraction of the electromagnet to the magnetic ink is adjusted according to the light intensity, therefore, the light transmittance of the magnetic ink is adjusted, a fixing frame device used for fixing the night vision device on a helmet is arranged on the end face of the upper side of the night vision device, and a locking device used for locking the fixing frame device is arranged on the fixing frame device.

2. A night vision device adaptable to different light intensities as set forth in claim 1, wherein: the two sliding holes are respectively arranged on the inner walls of the upper side and the lower side of the dimming cylinder and are symmetrical up and down, the opening of the sliding hole faces one side of the symmetric center, the inner wall of the sliding hole far away from the symmetric center is fixedly connected with an auxiliary electromagnet, a sliding pin which can extend into the dimming cylinder towards one side close to the symmetrical center is connected in the sliding hole in a sliding way, a shading mirror cover is slidably connected with the opening at the left side of the dimming cylinder and can seal the opening at the left side of the dimming cylinder, two limiting holes which are symmetrical up and down are arranged on the annular end surface of the light adjusting cylinder, the openings of the limiting holes face to one side far away from the symmetrical center, the limiting hole can be abutted against the sliding pin, the adjusting pipe is used for adsorbing and storing the magnetic black pigment in the magnetic printing ink, the photosensitive sensor is electrically connected with the electromagnet, and the photosensitive sensor is electrically connected with the auxiliary electromagnet.

3. A night vision device adaptable to different light intensities as set forth in claim 1, wherein: the fixing frame device comprises a fixing block fixedly connected to the upper end face of the night vision device, a sliding block is fixedly connected to the upper end face of the fixing block, a mounting bottom plate is arranged on the upper side of the sliding block, a left and right through sliding groove is formed in the mounting bottom plate and can be connected with the sliding block in a sliding mode, an auxiliary fixing block is fixedly connected to the upper end face of the mounting bottom plate, a rotating shaft extending forwards is fixedly connected to the front end face of the auxiliary fixing block, a rotating rod is rotatably connected to the rotating shaft, an auxiliary pulley positioned on the front side of the rotating rod is fixedly connected to the rotating shaft, a gear shaft positioned on the upper side of the rotating shaft is fixedly connected to the front end face of the rotating rod and extends forwards, a rotating arm is rotatably connected to the gear shaft, a gear positioned on the front side of the rotating arm is fixedly connected to the gear shaft, and, the belt wheel shaft is positioned at the lower left side of the gear shaft, the auxiliary gear meshed with the gear is fixedly connected to the belt wheel shaft, the belt wheel is fixedly connected to the end face of the front side of the auxiliary gear, the V-shaped belt is connected between the belt wheel and the auxiliary belt wheel, the rotating arm is hinged to the mounting block positioned at the upper right side of the gear shaft, the rotational damping of the hinged position of the mounting block and the rotating arm is large, the mounting block cannot rotate due to the gravity of the night vision device under the action of no external force, and the mounting block and the helmet can be fixedly connected through bolts.

4. A night vision device adaptable to different light intensities as set forth in claim 3, wherein: the transmission ratio between the gear and the auxiliary gear is one-to-one, and the transmission ratio between the belt wheel and the auxiliary belt wheel is one-to-one.

5. A night vision device adaptable to different light intensities as set forth in claim 3, wherein: the locking device comprises a piston cylinder fixedly connected to the rear end face of the rotating rod, a piston cavity is arranged in the piston cylinder, a piston is connected in the piston cavity in a sliding manner, a return spring is connected between the piston and the inner wall of the front side of the piston cavity, a piston rod is fixedly connected to the rear end face of the piston, the piston rod extends backwards to the outside of the end face of the piston cavity, a pin hole which penetrates up and down and is positioned at the rear side of the piston cylinder is arranged on the piston rod, a push plate which is positioned at the rear side of the pin hole is fixedly connected to the piston rod, a fixing plate which is positioned at the upper side of the piston rod is fixedly connected to the rear end face of the piston cylinder, a through hole which penetrates up and down is arranged in the fixing plate, a bolt which extends up and down and can be abutted against the pin hole, the end face of the front side of the piston cavity is communicated and connected with a connecting pipe, the connecting pipe is communicated and connected with a flow dividing pipe, the end face of the rear side of the rotating arm is fixedly connected with two auxiliary pressure cylinders which are symmetrical up and down, the auxiliary pressure cylinders are positioned at the upper side and the lower side of the gear shaft, the end face of the lower side of the mounting base plate is fixedly connected with two pressure cylinders which are symmetrical front and back, air cavities are arranged in the pressure cylinders and the auxiliary pressure cylinders, exhaust holes are arranged in the air cavities, pressure cavities positioned at one side of the air cavities close to the symmetrical center are arranged in the pressure cylinders and the auxiliary pressure cylinders, pressure holes are communicated and connected between the pressure cavities, auxiliary pistons are connected in the air cavities in a sliding mode, pressure rods are fixedly connected on the end faces of the auxiliary pistons close to the symmetrical center and extend towards one side close to the symmetrical center, the sliding plug is connected in the pressurizing cavity in a sliding mode, a fixed rod is fixedly connected to the end face, close to one side of the symmetric center, of the sliding plug, the fixed rod extends out of the end face, close to one side of the center, of the pressurizing cavity, a spring is connected between the sliding plug and the inner wall, close to one side of the symmetric center, of the pressurizing cavity, the fixed rod is fixedly connected to a clamping block, located out of the end face, close to one side of the symmetric center, of the pressurizing cavity, the clamping block on the pressurizing cylinder can be abutted to the fixed block, the clamping block on the auxiliary pressurizing cylinder can be abutted to the gear shaft, and an air pipe is communicated with the air cavity and the.

6. A night vision device adaptable to different light intensities as set forth in claim 5, wherein: the diameter of the auxiliary piston is larger than the diameters of the booster rod and the sliding plug, and the air pressure in the air cavity, the booster hole and the booster cavity are communicated, so that the acting force of the same air pressure on the auxiliary piston is smaller than the acting force on the sliding plug, the force can be increased, and the clamping force of the clamping block on the fixed block and the gear shaft on the sliding plug is improved.

Technical Field

The invention relates to the technical field of night vision devices, in particular to a night vision device capable of adapting to different illumination intensities.

Background

Night vision devices are divided into active and passive types: the image-adding tube night vision device is characterized in that an infrared searchlight is used for irradiating a target to receive reflected infrared radiation to form an image, the infrared radiation of the target is not transmitted to form a thermal image, the night vision device is divided into an image-adding tube night vision device and a digital night vision device, the image-adding tube night vision device has greater advantages in the identification capability of the target than the digital night vision device, the existing image-adding tube night vision device can not work under brighter illumination basically, the night vision device is easy to burn out when the night vision device is opened in the daytime, and the image-adding tube night vision device capable of working under stronger illumination is lacked.

Disclosure of Invention

The technical problem is as follows: the image intensifier tube night vision device can not work normally under strong light and is easy to damage under strong light at present.

In order to solve the above problems, the present embodiment provides a night vision device capable of adapting to different illumination intensities, which comprises a night vision device, wherein a light intensity adjusting device capable of automatically adjusting a light transmittance according to an external illumination intensity is arranged on a left end face in the night vision device, the light intensity adjusting device comprises a light adjusting cylinder fixedly connected to the left end face of the night vision device and penetrating left and right, a measuring box is fixedly connected to an upper end face of the light adjusting cylinder, a measuring cavity with an opening facing left is arranged in the measuring box, a transparent plate with a part located in the measuring cavity is fixedly connected in the light adjusting cylinder, a liquid storage cavity is arranged in the transparent plate, a photosensitive sensor located on the right side of the transparent plate is fixedly connected in the measuring cavity, an adjusting box is fixedly connected to a lower end face of the light adjusting cylinder, and an adjusting cavity is arranged in the adjusting box, the device is characterized in that an adjusting pipe is fixedly connected to the inner wall of the lower side of the adjusting cavity, electromagnets are fixedly connected to the upper side end face and the lower side end face of the adjusting pipe respectively, the electromagnets are symmetrical up and down, the rear end face of the adjusting pipe is communicated with the upper side end face of the liquid storage cavity to form a return pipe, the front end face of the adjusting pipe is communicated with the lower side end face of the liquid storage cavity to form a liquid conveying pipe, a turbine stirrer positioned at the front side of the adjusting pipe is communicated with the liquid conveying pipe, a liquid supply pump positioned at the front side of the turbine stirrer is communicated with the liquid conveying pipe, two sliding holes are formed in the inner wall of the dimming cylinder, the liquid conveying pipe, the adjusting pipe, the return pipe and the liquid storage cavity are filled with magnetic ink, the photosensitive sensor is used for detecting the illumination intensity in the measuring cavity, and the intensity, therefore, the light transmittance of the magnetic ink is adjusted, a fixing frame device used for fixing the night vision device on a helmet is arranged on the end face of the upper side of the night vision device, and a locking device used for locking the fixing frame device is arranged on the fixing frame device.

Preferably, the two sliding holes are respectively arranged on the inner walls of the upper side and the lower side of the dimming cylinder, and the two sliding holes are symmetrical up and down, the opening of the sliding hole faces one side of the symmetric center, the inner wall of the sliding hole far away from the symmetric center is fixedly connected with an auxiliary electromagnet, a sliding pin which can extend into the dimming cylinder towards one side close to the symmetrical center is connected in the sliding hole in a sliding way, a shading mirror cover is slidably connected with the opening at the left side of the dimming cylinder and can seal the opening at the left side of the dimming cylinder, two limiting holes which are symmetrical up and down are arranged on the annular end surface of the light adjusting cylinder, the openings of the limiting holes face to one side far away from the symmetrical center, the limiting hole can be abutted against the sliding pin, the adjusting pipe is used for adsorbing and storing the magnetic black pigment in the magnetic printing ink, the photosensitive sensor is electrically connected with the electromagnet, and the photosensitive sensor is electrically connected with the auxiliary electromagnet.

Preferably, the fixing frame device comprises a fixing block fixedly connected to the upper end surface of the night vision device, a sliding block is fixedly connected to the upper end surface of the fixing block, a mounting base plate is arranged on the upper side of the sliding block, a sliding groove which is through from left to right is formed in the mounting base plate, the sliding groove can be slidably connected with the sliding block, an auxiliary fixing block is fixedly connected to the upper end surface of the mounting base plate, a rotating shaft which extends forwards is fixedly connected to the front end surface of the auxiliary fixing block, a rotating rod is rotatably connected to the rotating shaft, an auxiliary pulley which is positioned in front of the rotating rod is fixedly connected to the rotating shaft, a gear shaft which is positioned on the upper side of the rotating shaft is fixedly connected to the front end surface of the rotating rod, the gear shaft extends forwards, a rotating arm is rotatably connected to the gear shaft, a gear which is positioned in front of the rotating arm is fixedly, the belt wheel shaft is positioned at the lower left side of the gear shaft, the auxiliary gear meshed with the gear is fixedly connected to the belt wheel shaft, the belt wheel is fixedly connected to the end face of the front side of the auxiliary gear, the V-shaped belt is connected between the belt wheel and the auxiliary belt wheel, the rotating arm is hinged to the mounting block positioned at the upper right side of the gear shaft, the rotational damping of the hinged position of the mounting block and the rotating arm is large, the mounting block cannot rotate due to the gravity of the night vision device under the action of no external force, and the mounting block and the helmet can be fixedly connected through bolts.

Preferably, the transmission ratio between the gear and the secondary gear is one to one, and the transmission ratio between the pulley and the secondary pulley is one to one.

Preferably, the locking device comprises a piston cylinder fixedly connected to the rear end face of the rotating rod, a piston cavity is arranged in the piston cylinder, a piston is connected in the piston cavity in a sliding manner, a return spring is connected between the piston and the inner wall of the front side of the piston cavity, a piston rod is fixedly connected to the rear end face of the piston, the piston rod extends backwards to the end face of the piston cavity, a pin hole which is communicated from top to bottom and is positioned at the rear side of the piston cylinder is arranged on the piston rod, a push plate which is positioned at the rear side of the pin hole is fixedly connected to the piston rod, a fixing plate which is positioned at the upper side of the piston rod is fixedly connected to the rear end face of the piston cylinder, a through hole which is communicated from top to bottom is arranged in the fixing plate, a pin which extends from top, an extension spring is connected between the stop block and the fixed plate, a connecting pipe is connected on the front end face of the piston cavity in a communicating manner, a flow dividing pipe is connected on the connecting pipe in a communicating manner, two auxiliary pressure cylinders which are symmetrical up and down are fixedly connected on the rear end face of the rotating arm, the auxiliary pressure cylinders are positioned on the upper side and the lower side of the gear shaft, two pressure cylinders which are symmetrical front and back are fixedly connected on the lower end face of the mounting bottom plate, air cavities are respectively arranged in the pressure cylinders and the auxiliary pressure cylinders, exhaust holes are arranged in the air cavities, pressure cavities positioned on one sides of the air cavities close to the symmetrical center are respectively arranged in the pressure cylinders and the auxiliary pressure cylinders, pressure holes are connected between the pressure cavities and the air cavities in a communicating manner, auxiliary pistons are connected in the air cavities in a sliding manner, pressure rods are fixedly connected on the end faces of the, the pressurizing rod is connected with the pressurizing hole in a sliding mode, a sliding plug is connected in the pressurizing cavity in a sliding mode, a fixed rod is fixedly connected to the end face of one side of the sliding plug, which is close to the symmetric center, extends to the position, which is close to the end face of one side of the center, of the pressurizing cavity, a spring is connected between the sliding plug and the inner wall of one side of the pressurizing cavity, which is close to the inner wall of one side of the symmetric center, the fixed rod is fixedly connected with a clamping block, which is located at the position, of the pressurizing cavity, which is close to the end face of one side of the symmetric center, the clamping block on the pressurizing cylinder can be abutted to the fixed block, the clamping block on the auxiliary pressurizing cylinder can.

Preferably, the diameter of the secondary piston is larger than the diameters of the booster rod and the sliding plug, and the air pressure in the air cavity, the booster hole and the booster cavity are communicated, so that the acting force of the same air pressure on the secondary piston is smaller than that on the sliding plug, and the force can be increased, and the clamping force of the clamping block on the fixed block and the gear shaft on the sliding plug is improved.

The invention has the beneficial effects that: the invention uses magnetic ink and a hollow lens as a shading lens, a concentration control mechanism can adjust the concentration of magnetic pigment in the magnetic ink by controlling the attraction of an electromagnet, thereby changing the light transmittance of the shading lens, a photosensitive sensor is arranged at the rear side of the shading lens in a light intensity detection cavity, the photosensitive sensor is used for detecting whether the illumination intensity accords with the working range of an image intensifier tube in a night vision device, if the illumination is too strong, the photosensitive sensor reduces the electricity passing amount of the electromagnet through a control circuit, reduces the attraction of the electromagnet on the magnetic pigment, releases more magnetic pigment into the magnetic ink, reduces the light transmittance of the shading lens, if the illumination is too weak, the attraction of the electromagnet is improved, thereby improving the light transmittance of the shading lens, and leading the illumination intensity injected into the image intensifier tube to accord with the working range, therefore, the night vision device of the image intensifier tube can work in a larger illumination intensity range, the image intensifier tube night vision device can work normally under strong illumination.

Drawings

For ease of illustration, the invention is described in detail by the following specific examples and figures.

FIG. 1 is a schematic view of the overall structure of a night vision device of the present invention that can accommodate different illumination intensities;

FIG. 2 is a schematic view of the structure in the direction "A-A" of FIG. 1;

FIG. 3 is a schematic view of the structure in the direction "B-B" of FIG. 1;

FIG. 4 is an enlarged view of the structure at "C" of FIG. 1;

FIG. 5 is an enlarged view of the structure at "D" of FIG. 1;

FIG. 6 is an enlarged view of the structure at "E" in FIG. 3;

FIG. 7 is an enlarged view of the structure at "F" of FIG. 2;

FIG. 8 is an enlarged view of the structure at "G" in FIG. 2;

fig. 9 is an enlarged schematic view of the structure at "H" of fig. 2.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 9, and for the sake of convenience of description, the following orientations will be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a night vision device capable of adapting to different illumination intensities, which is mainly applied to the night vision device, and the invention is further explained by combining the attached drawings of the invention as follows:

the invention relates to a night vision device capable of adapting to different illumination intensities, which comprises a night vision device 11, wherein a light intensity adjusting device 101 capable of automatically adjusting the light transmittance according to the external illumination intensity is arranged on the left side end surface in the night vision device 11, the light intensity adjusting device 101 comprises a light adjusting cylinder 17 which is fixedly connected to the left side end surface of the night vision device 11 and is communicated with the left and the right, a measuring box 40 is fixedly connected to the upper side end surface of the light adjusting cylinder 17, a measuring cavity 39 with an opening facing the left is arranged in the measuring box 40, a light transmitting plate 20 with a part positioned in the measuring cavity 39 is fixedly connected in the light adjusting cylinder 17, a liquid storage cavity 48 is arranged in the light transmitting plate 20, a photosensitive sensor 47 positioned on the right side of the light transmitting plate 20 is fixedly connected in the measuring cavity 39, an adjusting box 18 is fixedly connected to the lower side end surface of the light adjusting cylinder 17, an adjusting cavity 42 is, respectively fixedly connected with electro-magnet 46 on the regulating tube 45 upside and the downside terminal surface, and two electro-magnet 46 longitudinal symmetry, regulating tube 45 rear end face with the 48 upside terminal surfaces of stock solution chamber communicate with each other and are connected with back flow 38, regulating tube 45 front end face with 48 downside terminal surfaces of stock solution chamber communicate with each other and are connected with transfer line 41, the last intercommunication connection of transfer line 41 is located the turbine agitator 44 of regulating tube 45 front side, the last intercommunication connection of transfer line 41 is located the liquid feed pump 43 of turbine agitator 44 front side, be equipped with two slide holes 50 on the light modulation section of thick bamboo 17 inner wall, transfer line 41, regulating tube 45, back flow 38 and be full of magnetic ink in the stock solution chamber 48, through photosensitive sensor 47 detects measure the illumination intensity in the chamber 39 to adjust according to illumination intensity the magnetization pigment suction intensity of electro-magnet 46 to magnetic ink, thereby adjusting the light transmittance of the magnetic ink, a fixing bracket device 102 for fixing the night vision device 11 on the helmet 26 is disposed on the upper end surface of the night vision device 11, and a locking device 103 for locking the fixing bracket device 102 is disposed on the fixing bracket device 102.

Beneficially, two of the sliding holes 50 are respectively disposed on the upper side and the lower side inner wall of the dimming barrel 17, and the two sliding holes 50 are symmetrical up and down, the opening of the sliding hole 50 faces one side of the symmetry center, the inner wall of the sliding hole 50 far from one side of the symmetry center is fixedly connected with an auxiliary electromagnet 49, the sliding hole 50 is connected with a sliding pin 52 which can extend into the dimming barrel 17 to one side close to the symmetry center in a sliding manner, the opening of the left side of the dimming barrel 17 is connected with a shutter cover 19 in a sliding manner, the shutter cover 19 can close the opening of the left side of the dimming barrel 17, two limiting holes 53 which are symmetrical up and down are arranged on the circumferential end surface of the dimming barrel 17, the opening of the limiting hole 53 faces one side far from the symmetry center, and the limiting hole 53 can abut against the sliding pin 52, the adjusting tube 45 is used for adsorbing and storing magnetic black pigment in magnetic ink, and the photosensitive sensor 47 is electrically connected with the electromagnet, photosensitive sensor 47 with vice electro-magnet 49 electric connection, through photosensitive sensor 47 detects and sees through the illumination intensity of stock solution chamber 48, if illumination intensity is higher than the setting value, then electromagnet 46 suction reduces, releases more magnetic pigment to the magnetic ink in, reduces the luminousness of magnetic ink, if illumination intensity is less than the setting value, then electromagnet 46 suction increase adsorbs the magnetic pigment in more magnetic ink, improves the luminousness of magnetic ink, thereby makes the illumination intensity on light-passing board 20 right side is located in night-time vision device 11 working range to avoid the too big damage of illumination intensity night-time vision device 11.

Advantageously, the fixing frame device 102 includes a fixing block 12 fixedly connected to the upper end surface of the night vision device 11, a sliding block 13 is fixedly connected to the upper end surface of the fixing block 12, a mounting base plate 16 is disposed on the upper side of the sliding block 13, a sliding slot 15 penetrating from left to right is disposed in the mounting base plate 16, the sliding slot 15 is slidably connected to the sliding block 13, a sub-fixing block 21 is fixedly connected to the upper end surface of the mounting base plate 16, a rotating shaft 34 extending forward is fixedly connected to the front end surface of the sub-fixing block 21, a rotating rod 22 is rotatably connected to the rotating shaft 34, a sub-pulley 33 located at the front side of the rotating rod 22 is fixedly connected to the rotating shaft 34, a gear shaft 28 located at the upper side of the rotating shaft 34 is fixedly connected to the front end surface of the rotating rod 22, the gear shaft 28 extends forward, a rotating arm 23 is rotatably connected to the gear shaft 28, a, a pulley shaft 30 extending forwards is rotatably connected to the end face of the front side of the rotating arm 23, the pulley shaft 30 is located on the lower left side of the gear shaft 28, a pinion 29 engaged with the gear 27 is fixedly connected to the pulley shaft 30, a pulley 31 is fixedly connected to the end face of the front side of the pinion 29, a V-belt 32 is connected between the pulley 31 and the pinion 33, a mounting block 24 located on the upper right side of the gear shaft 28 is hinged to the rotating arm 23, the rotational damping at the hinged position of the mounting block 24 and the rotating arm 23 is large, the rotating arm 23 and the mounting block 24 cannot be rotated by the self gravity of the night vision device 11 under the action of no external force, the mounting block 24 and the helmet 26 can be fixedly connected through bolts, the rotating rod 22 is manually driven to rotate, and the rotating rod 22 can drive the pulley 31 to rotate through the engagement connection of the gear 27 and the pinion 29, so as to drive the auxiliary fixing block 21 to rotate, and the rotation direction of the auxiliary fixing block 21 is opposite to that of the rotating rod 22, so that the mounting bottom plate 16 is always in a horizontal position.

Advantageously, the transmission ratio between the gear 27 and the secondary gear 29 is one-to-one, and the transmission ratio between the pulley 31 and the secondary pulley 33 is one-to-one.

Beneficially, the locking device 103 includes a piston cylinder 37 fixedly connected to the rear end face of the rotating rod 22, a piston cavity 61 is arranged in the piston cylinder 37, a piston 60 is slidably connected in the piston cavity 61, a return spring 62 is connected between the piston 60 and the inner wall of the front side of the piston cavity 61, a piston rod 56 is fixedly connected to the rear end face of the piston 60, the piston rod 56 extends rearward beyond the end face of the piston cavity 61, a pin hole 55 penetrating up and down and located at the rear side of the piston cylinder 37 is arranged on the piston rod 56, a push plate 54 located at the rear side of the pin hole 55 is fixedly connected to the piston rod 56, a fixing plate 77 located at the upper side of the piston rod 56 is fixedly connected to the rear end face of the piston cylinder 37, a through hole 78 penetrating up and down is arranged in the fixing plate 77, a plug pin 57 extending up and down and abutting against the, a stop block 59 is fixedly connected to the upper end face of the bolt 57, an extension spring 58 is connected between the stop block 59 and the fixing plate 77, a connecting pipe 63 is connected to the front end face of the piston cavity 61 in a communicating manner, a flow dividing pipe 65 is connected to the connecting pipe 63 in a communicating manner, two auxiliary pressure cylinders 66 which are symmetrical up and down are fixedly connected to the rear end face of the rotating arm 23, the auxiliary pressure cylinders 66 are positioned on the upper and lower sides of the gear shaft 28, two pressure cylinders 36 which are symmetrical front and back are fixedly connected to the lower end face of the mounting base plate 16, air cavities 68 are respectively arranged in the pressure cylinders 36 and the auxiliary pressure cylinders 66, an exhaust hole 67 is arranged in the air cavity 68, pressure cavities 72 which are positioned on one sides of the air cavities 68 close to the symmetrical center are respectively arranged in the pressure cylinders 36 and the auxiliary pressure cylinders 66, pressure holes 71 are connected between the pressure cavities 72 and the air cavities, a pressure increasing rod 70 is fixedly connected to one side end surface of the auxiliary piston 69 close to the symmetry center, the pressure increasing rod 70 extends to one side close to the symmetry center, the pressure increasing rod 70 is slidably connected with the pressure increasing hole 71, a sliding plug 73 is slidably connected in the pressure increasing cavity 72, a fixing rod 75 is fixedly connected to one side end surface of the sliding plug 73 close to the symmetry center, the fixing rod 75 extends to one side close to the symmetry center to the outside of one side end surface of the pressure increasing cavity 72 close to the center, a spring 74 is connected between the sliding plug 73 and the inner wall of the pressure increasing cavity 72 close to the symmetry center, a clamping block 76 positioned at one side end surface of the pressure increasing cavity 72 close to the symmetry center is fixedly connected to the fixing rod 75, the clamping block 76 on the pressure increasing cylinder 36 can be abutted against the fixing block 12, and the clamping block 76 on the auxiliary pressure increasing cylinder 66, an air pipe 35 is connected between the air chamber 68 and the shunt tube 65, and the holding block 76 can abut against the gear shaft 28 and the fixed block 12 by moving the holding block 76 to a side close to the symmetry center, so that the gear shaft 28 and the fixed block 12 can be locked.

Advantageously, the diameter of the secondary piston 69 is larger than the diameters of the pressure increasing rod 70 and the sliding plug 73, and the same gas pressure has smaller acting force on the secondary piston 69 than acting force on the sliding plug 73 due to the communication of the gas pressure in the gas chamber 68, the pressure increasing hole 71 and the pressure increasing chamber 72, so that the force increasing can be realized, and the clamping force of the clamping block 76 on the fixed block 12 and the gear shaft 28 is improved.

The following detailed description of the steps of using a night vision device capable of accommodating different illumination intensities is provided with reference to fig. 1 to 9:

at the beginning, the part of the shutter cover 19 is positioned in the dimming cylinder 17, the auxiliary electromagnet 49 is not electrified, under the thrust action of the compression spring 51, the sliding pin 52 is positioned at a limit position on one side close to the symmetric center, the sliding pin 52 is abutted with the limit hole 53 to limit the shutter cover 19 to move left and right, under the thrust action of the return spring 62, the piston 60 is positioned at a limit position on the rear side, the pin hole 55 is not abutted with the bolt 57, the auxiliary piston 69 and the sliding plug 73 are positioned at a limit position on one side far away from the symmetric center, the clamping block 76 is not contacted with the fixed block 12 and the gear shaft 28, the bolt 57 is abutted with the upper end face of the piston rod 56, and the bolt 57.

When the installation and fixation are carried out, the installation block 24 is held by hand, the installation block 24 is placed on an installation opening of a helmet 26, the installation block 24 and the helmet 26 are fixed by bolts, the slide block 13 is inserted into the slide groove 15 by the hand-held night vision device 11, the rotating arm 23 is manually rotated downwards to the lower limit position, then the rotating rod 22 is manually rotated to adjust the up-and-down position of the night vision device 11 and eyes, the rotating rod 22 drives the gear 27 to rotate through the gear shaft 28, the gear 27 drives the pinion 29 to rotate through meshing connection, the pinion 29 drives the belt pulley 31 to rotate, the belt pulley 31 drives the secondary belt pulley 33 to rotate through the V belt 32, the secondary belt pulley 33 drives the secondary fixing block 21 to rotate through the rotating shaft 34, the rotating directions of the secondary fixing block 21 and the rotating rod 22 are opposite, the secondary fixing block 21 and the installation bottom plate 16 are always kept horizontal, after the up-and-down positions of the night vision device,

after the left and right distances are adjusted, the push plate 54 is manually pushed forwards, the piston 60 is driven by the push plate 54 through the piston rod 56 to move forwards, the airflow generated by the forward movement of the piston 60 is conveyed into the flow dividing pipe 65 through the connecting pipe 63, the airflow in the flow dividing pipe 65 is conveyed into the air cavity 68 through the air pipe 35, then the airflow drives the secondary piston 69 to move towards one side close to the symmetric center, the secondary piston 69 drives the pressure increasing rod 70 to move towards one side close to the symmetric center, the airflow generated by the movement of the pressure increasing rod 70 drives the sliding plug 73 to move towards one side close to the symmetric center, the sliding plug 73 drives the clamping block 76 to move towards one side close to the symmetric center through the fixing rod 75 and clamps and fixes the fixed block 12 and the gear shaft 28, so as to lock the fixed block 12 and the gear shaft 28, at the moment, the piston 60 moves to the front limit position, thereby completing the mounting and position adjustment of the night vision device 11.

When the magnetic ink circulation device works, the liquid supply pump 43 is started, magnetic ink is conveyed into the liquid storage cavity 48 through the liquid conveying pipe 41, the magnetic ink in the liquid storage cavity 48 is conveyed into the adjusting pipe 45 through the return pipe 38, the ink in the adjusting pipe 45 is conveyed into the turbine stirrer 44 through the liquid conveying pipe 41 and then is conveyed back into the liquid supply pump 43 through the liquid conveying pipe 41, the circulation of the magnetic ink is realized,

when the illumination intensity on the right side of the light-transmitting plate 20 is higher than the set range of the photosensitive sensor 47, that is, higher than the illumination intensity range allowed by the operation of the night-vision device 11, the auxiliary electromagnet 49 is not electrified to prevent the light-shielding mirror cover 19 from being removed, thereby preventing the night-vision device 11 from being damaged due to the excessive illumination intensity, the photosensitive sensor 47 reduces the current of the electromagnet 46 through the circuit control system, so that the attraction force of the electromagnet 46 is reduced, the adjusting tube 45 releases part of the stored magnetic pigment, the magnetic pigment in the magnetic ink is increased, the magnetic ink in the adjusting tube 45 passes through the turbine stirrer 44, the turbine stirrer 44 is rotated and stirred to uniformly mix the magnetic ink, and then the magnetic ink is conveyed into the liquid storage cavity 48 through the liquid supply pump 43 and the liquid conveying tube 41, so that the light transmittance of the magnetic ink in the liquid storage cavity 48 is reduced, the illumination intensity on the right, the attraction force of the electromagnet 46 is kept unchanged, so that the concentration of the magnetic pigment in the magnetic ink is kept unchanged, the existing light transmittance is kept, at the moment, the auxiliary electromagnet 49 is electrified to adsorb the sliding pin 52, the sliding pin 52 moves to the limiting position to one side far away from the symmetry center, the sliding pin 52 is separated from the limiting hole 53, so that a user can take down the lens cover 19 and observe through the night vision device 11,

when the illumination intensity on the right side of the light-transmitting plate 20 is lower than the set range of the photosensitive sensor 47, the auxiliary electromagnet 49 is in an electrified state, so that the sliding pin 52 cannot limit the movement of the light-shielding mirror cover 19, the photosensitive sensor 47 increases the current of the electromagnet 46 through a circuit control system, the attraction force of the electromagnet 46 is improved, the adjusting tube 45 adsorbs and stores the magnetic pigment of the magnetic ink, the concentration of the magnetic pigment in the magnetic ink is reduced, the light transmittance of the magnetic ink is improved, the illumination intensity on the right side of the light-transmitting plate 20 is increased to the range allowed by the work of the night vision device 11, and the automatic adaptation to.

Through the function of automatically adapting to different illumination intensities, the illumination intensity range allowed by the work of the whole equipment is larger, and the whole equipment can work in the daytime.

The invention has the beneficial effects that: the invention uses magnetic ink and a hollow lens as a shading lens, a concentration control mechanism can adjust the concentration of magnetic pigment in the magnetic ink by controlling the attraction of an electromagnet, thereby changing the light transmittance of the shading lens, a photosensitive sensor is arranged at the rear side of the shading lens in a light intensity detection cavity, the photosensitive sensor is used for detecting whether the illumination intensity accords with the working range of an image intensifier tube in a night vision device, if the illumination is too strong, the photosensitive sensor reduces the electricity passing amount of the electromagnet through a control circuit, reduces the attraction of the electromagnet on the magnetic pigment, releases more magnetic pigment into the magnetic ink, reduces the light transmittance of the shading lens, if the illumination is too weak, the attraction of the electromagnet is improved, thereby improving the light transmittance of the shading lens, and leading the illumination intensity injected into the image intensifier tube to accord with the working range, therefore, the night vision device of the image intensifier tube can work in a larger illumination intensity range, the image intensifier tube night vision device can work normally under strong illumination.

In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.