Four-eye night vision device
By optimizing the main frame structure and lens design of the four-eye night vision device and combining it with a detachable connection cavity and conductive shrapnel, the problems of heavy weight and complex assembly of the four-eye night vision device have been solved, lightweight and reliable connection have been achieved, and production costs have been reduced.
Patent Information
- Application Number
- CN202423029474.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing four-eye night vision devices have complex structures, heavy weight, high costs, and difficult assembly and electrical connection of image intensifiers, making it difficult to meet flexible application requirements.
A V-shaped main lens frame houses two image intensifiers and a circuit board. Threaded connections simplify the connection between the objective lens and the main lens frame, optimize the lens structure, and provide a detachable connection cavity and conductive springs to achieve simplified assembly and reliable electrical connection.
The four-eye night vision device has a compact structure, light weight, easy installation, reliable connection and low cost, improves the stability and service life of the image intensifier, and reduces the difficulty and cost of assembly.
Smart Images
Figure CN223389982U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of night vision devices, and in particular to a four-eye night vision device with compact structure, low weight, convenient installation, reliable connection and low cost. Background Art
[0002] Night vision goggles are night sights with an image intensifier as their core component. With technological advancements, night vision goggles have evolved from monocular to modern quadrocopist systems. Monocular night vision goggles utilize a single image intensifier, corresponding objective lens, and eyepiece, making them simple, portable, and low-cost. However, due to their limited field of view and depth perception, they are currently commonly used for casual observation, reconnaissance, and simple navigation. Binocular night vision goggles, on the other hand, utilize two image intensifiers, two objective lenses, and two eyepieces, providing each eye with an independent field of view, resulting in a more natural observation and more accurate depth perception. While the field of view is still somewhat limited, the cost is manageable, making them popular for outdoor adventures, long-term observation, and certain specialized missions. Quadrocopist night vision goggles, which are equivalent to four monocular night vision goggles, provide a 120-degree field of view that is roughly equivalent to the natural human eye's field of view, thus avoiding the limited field of view of monocular and binocular goggles. Consequently, they are increasingly being used in search and rescue, counterterrorism, and special operations.
[0003] Since a four-eye night vision device is equivalent to integrating four sets of monocular night vision devices, its structure is more complex, resulting in a heavier overall weight and higher cost. In order to enable flexible application, it is necessary to improve the design to reduce weight and the difficulty of assembly and debugging, thereby reducing the burden of use and production. However, existing four-eye night vision devices are mostly simple integrations of various monocular night vision devices, and are more focused on optimizing and improving the quality of image stitching. Although lightweight materials are also used to reduce weight, the optical system still mostly uses a traditional design. This not only leads to a large number of lenses and a large lens volume, which causes the optical system to occupy a large proportion of the overall weight, but also makes the four-eye night vision device larger and more difficult to correct various aberrations. The main mirror body is mostly a simple integration of a monocular structure. Due to space constraints, the weight reduction effect is limited, and assembly and subsequent debugging are also more complicated and cumbersome. To this end, in the prior art, a special-shaped spring clip holder is fixed in the middle of the rear portion of the main lens body, and conductive spring clips are respectively fixed on the spring clip holder at the positive and negative pole positions corresponding to the image intensifier, so that the positive and negative poles of the image intensifier installed in the binocular tube shell are elastically abutted against the conductive spring clips on the spring clip holder, so that a reliable electrical connection can be formed while ensuring that the image intensifier is reliably positioned after being installed in the binocular tube shell. However, since the spring clip holder is a special-shaped structure, it is not only cumbersome and costly to manufacture, but also relies on the worker's skills to accurately position and fix the spring clip holder in the binocular tube shell, and it is also difficult to replace or debug the conductive spring clip after it fails. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a four-eye night vision device with compact structure, low weight, convenient installation, reliable connection and low cost.
[0005] The utility model is implemented as follows: it comprises an objective lens, a main lens body, and an eyepiece, wherein the main lens body comprises a main lens frame of a V-shaped structure, the main lens frame has two built-in image intensifiers and a circuit board is arranged between the image intensifiers, the object side of the main lens body is detachably fixed with two objective lenses, and the image side of the main lens body is detachably provided with an eyepiece;
[0006] The eyepiece comprises an eyepiece frame detachably connected to the image side of the main mirror body, two sets of eyepiece lens groups are arranged in the eyepiece frame, and an eyepiece ferrule is fixed to one end of the eyepiece frame away from the main mirror body;
[0007] The objective lens includes an objective lens seat that slides and extends into the main lens frame and abuts the image intensifier, an objective lens group that is threadedly connected on the image side and extends into the objective lens seat, an objective lens pressure ring that is threadedly connected and extends into the main lens frame and abuts the objective lens seat, and a focusing handwheel fixedly sleeved on the objective lens group. A flange is provided on the image side of the objective lens seat, and the image side of the objective lens pressure ring abuts the flange with a sealing ring I provided therebetween.
[0008] Furthermore, the objective lens group includes an objective lens barrel, an objective lens group, a front pressure ring detachably fixedly arranged on the object side of the objective lens barrel and abutting against the objective lens group, a lens frame for fixing the objective lens, and objective lens spacers I, II, and III for separating the objective lenses;
[0009] The objective lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, which are sequentially arranged along the optical path from the object side to the image side. The objective lens barrel is a four-step hollow shaft with a diameter decreasing sequentially from the object side to the image side. The second lens, the third lens and the fourth lens constitute a first cemented lens, and the fifth lens and the sixth lens constitute a second cemented lens. The second cemented lens is fixedly sleeved in the lens frame and is arranged in the second step hole on the image side of the objective lens barrel through the objective lens spacer III. The first cemented lens is slidably arranged in the second step hole on the object side of the objective lens barrel and abuts against the lens frame through the objective lens spacer II. The first lens is slidably arranged in the first step hole on the object side of the objective lens barrel and abuts against the first cemented lens through the objective lens spacer I. The image side of the front pressure ring abuts against the first lens.
[0010] Furthermore, the first lens, the second lens and the fifth lens are all meniscus lenses with a convex object side surface, the third lens and the sixth lens are all biconvex lenses, the fourth lens is a biconcave lens, and the seventh lens is a single concave lens with a concave object side surface and a flat image side surface; the first lens is a positive refractive power objective lens, the first cemented lens is a negative refractive power objective lens, the second cemented lens is a positive refractive power objective lens, and the seventh lens is a negative refractive power objective lens.
[0011] Furthermore, the objective lens mount is a two-step hollow shaft with a diameter decreasing from the object side to the image side, the flange is coaxially fixed on the image side end face of the objective lens mount, the image side step outer cylindrical surface of the objective lens barrel is threadedly connected and extends into the image side step hole of the objective lens mount, one of the step outer cylindrical surfaces of the objective lens barrel movably extends into the object side step hole of the objective lens mount and a sealing ring II is sleeved on the step outer cylindrical surface; the image side sliding sleeve of the focusing handwheel is provided with a retaining ring group, the retaining ring group includes an open retaining ring, a screw I connecting the two sides of the retaining ring opening, and a guide pin vertically fixed on the image side of the retaining ring, the retaining ring sliding sleeve is provided on the focusing handwheel, and a guide hole is correspondingly provided on the object side of the objective lens pressure ring, and the guide pin slides and extends into the guide hole of the objective lens pressure ring.
[0012] Furthermore, connecting cavities are provided on the left and right sides of the interior of the main lens frame, and the two image intensifiers are respectively slidably arranged in the two connecting cavities of the main lens frame. The two connecting cavities inside the main lens frame are interconnected, and the upper and lower walls are respectively provided with corresponding card slots. The circuit board is vertically arranged and the upper and lower ends are respectively pluggable and arranged in the card slots of the upper and lower walls of the main lens frame. Two conductive springs are fixed on the two side surfaces of the circuit board at intervals, and the conductive springs on both sides of the circuit board are elastically abutted against the positive and negative poles of the two image intensifiers respectively. The upper wall of the main lens frame is penetrated by a conductive pin electrically connected to the conductive springs on the circuit board.
[0013] Furthermore, the conductive spring clips on the side of the circuit board are arranged on the upper and lower sides of the horizontal plane corresponding to the center of the image intensifier, and the conductive spring clips include a plate-shaped connecting portion and a bent portion. The connecting portion is fixedly fitted to the side of the circuit board, and the bent portion protrudes from the surface of the circuit board and can elastically abut against the electrode of the image intensifier; the image end of the bent portion is connected to the connecting portion and the object end is suspended. The cross-section of the bent portion is a "V"-shaped structure with the opening facing the circuit board and the top end corresponds to the electrode position of the image intensifier, and the positive projection of the suspended end of the bent portion on the side of the circuit board is within the range of the connecting portion.
[0014] Furthermore, the upper and lower conductive spring sheets on one side of the circuit board can be elastically abutted against the positive and negative poles of the corresponding image intensifier, respectively, and the upper and lower conductive spring sheets on the other side can be elastically abutted against the negative and positive poles of the corresponding image intensifier, respectively. The conductive spring sheets on both sides of the circuit board that are elastically abutted against the positive pole are electrically connected to each other and the conductive spring sheets that are elastically abutted against the negative pole are electrically connected to each other. The positive and negative conductive spring sheets of the circuit board are electrically connected to the corresponding positive and negative conductive pins, respectively.
[0015] Furthermore, a conductive strip I is vertically fixed on each side of the circuit board, and the upper ends of the two conductive strips I are electrically connected to the conductive spring sheets on the same side. The two conductive strips I pass through the circuit board near the lower conductive spring sheet and are electrically connected to the conductive spring sheet at the lower part of the other side; a conductive strip II is also horizontally fixed on each side of the circuit board and extends to the image side end face close to the circuit board, one end of the conductive strip II is electrically connected to the conductive strip I on the same side and the other end is electrically connected to the corresponding conductive pin.
[0016] Furthermore, the circuit board mounted in the card slot of the main frame extends toward the image side and a connecting plate is horizontally fixed on the top. Two crown spring terminals that cooperate with the conductive pins are spaced apart on the upper surface of the connecting plate. The two crown spring terminals are electrically connected to the corresponding positive and negative conductive spring sheets respectively.
[0017] Furthermore, the portion of the connecting cavity close to the object side is a columnar structure and slides the object side portion of the built-in image intensifier. The middle portion of the connecting cavity and the side wall on the image side away from the circuit board are arc surfaces that can fit the outer circular surface of the image intensifier, and the electrodes of the image intensifier are arranged close to the image side.
[0018] Beneficial effects of the utility model:
[0019] 1. The utility model threadably connects the objective lens pressure ring to the main lens frame so that it abuts the flange of the objective lens seat, thereby simplifying the connection between the objective lens and the main lens frame, effectively simplifying the connection structure to reduce weight and volume while ensuring connection reliability, and facilitating adjustment of the focal length of the objective lens; and by sliding the objective lens seat into the main lens frame and abutting the image intensifier, the objective lens group is extended from the object side threaded connection into the objective lens seat, and a threaded objective lens pressure ring extending into the main lens frame and abutting the objective lens seat is provided, as well as a focusing hand wheel fixedly sleeved on the objective lens group, so that the objective lens group can be moved axially in the objective lens seat by the focusing hand wheel to achieve zooming, and the focusing structure is effectively simplified.
[0020] 2. The objective lens assembly of the present invention adopts seven lenses with a specific structure. Through the specific optical power distribution and combination of the seven lenses, not only can the spherical aberration, field curvature, distortion, chromatic aberration and secondary spectral chromatic aberration of the objective optical system be optimized, but also the weight and size of the objective lens can be reduced, thereby ensuring that the night vision device has good aberration, compact structure and low weight; and the second, third and fourth lenses in the objective lens assembly are composed of a first cemented lens, and the fifth and sixth lenses are composed of a second cemented lens, which not only significantly shortens the size of the objective lens assembly, but also reduces the number of spacers to reduce the overall weight, and also reduces the workload of optical adjustment and correction of chromatic aberration of the objective lens assembly.
[0021] 3. The utility model provides two interconnected connecting cavities in the main lens frame to accommodate the image intensifier, and corresponding card slots for inserting the circuit board are provided on the upper and lower walls of the main lens frame between the connecting cavities, and conductive springs that elastically abut against the positive and negative electrodes of the image intensifier are fixed on the upper and lower sides of the circuit board respectively. Therefore, the image intensifier can be slidably installed through the connecting cavity, and the circuit board can be plugged in and out through the card slot, which effectively simplifies the assembly and debugging of the image intensifier and the circuit board, avoids the deficiency of the assembly accuracy relying on the skills of the workers, and the electrodes of the image intensifier after installation elastically abut against the conductive springs on the circuit board, which can also ensure that a stable and reliable electrical connection is formed after assembly.
[0022] 4. The utility model is based on the structural characteristics of the main mirror body of the four-eye night vision device. Through optimized design, the two connecting cavities in the main mirror frame are interconnected, and slots are respectively provided on the upper and lower walls of the main mirror frame to plug and unplug the plate-shaped circuit board. This can not only simplify the structure of the main mirror frame and the circuit board and reduce the process cost, but also effectively reduce the weight of the structure and alleviate the burden of use while ensuring a reliable connection after assembly.
[0023] 5. The image intensifier of the present invention forms a micro-floating connection structure through the connection cavity of the main lens frame and the conductive spring on the circuit board, which can effectively reduce the impact of violent shaking and bumping of the night vision device on the image intensifier, thereby improving the stability and service life of the image intensifier. In addition, the elastic contact between the conductive spring and the electrode can not only ensure the reliability of the electrical connection after long-term use, but also effectively reduce the difficulty of electrical connection of the image intensifier.
[0024] In summary, the utility model has the characteristics of compact structure, low weight, convenient installation, reliable connection and low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0026] Figure 2 for Figure 1 Exploded view of;
[0027] Figure 3 for Figure 1 sectional view of
[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the objective lens assembly and the objective lens base of the present utility model;
[0029] Figure 5 for Figure 4 sectional view of
[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of the objective lens pressure ring of the present utility model;
[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the main mirror body of the utility model;
[0032] Figure 8 This is an exploded view of the main mirror body of the utility model;
[0033] Figure 9 This is a side view of the main mirror of the present invention;
[0034] Figure 10 for Figure 9 AA sectional view;
[0035] Figure 11 This is a schematic diagram of the circuit board structure of the utility model;
[0036] Figure 12 for Figure 11 The upper right top view of
[0037] In the figure: 100 - objective lens, 110 - objective lens mount, 111 - flange, 120 - objective lens group, 121 - objective lens barrel, 122 - objective lens group, 122A - first lens, 122B - second lens, 122C - third lens, 122D - fourth lens, 122E - fifth lens, 122F - sixth lens, 122G - seventh lens, 123 - front pressure ring, 124 - lens frame, 125 - objective lens spacer I, 126 - objective lens spacer II, 127 - objective lens spacer III, 130 - objective lens pressure ring, 140 - focusing handwheel, 150 - sealing ring I, 160 - decorative ring, 170 - sealing ring Ⅱ, 180-sealing ring Ⅲ, 190-retaining ring assembly, 191-retaining ring, 192-screw Ⅰ, 193-guide pin, 200-main mirror body, 210-main mirror frame, 211-connecting cavity, 212-card slot, 213-dovetail groove, 220-image intensifier, 221-electrode, 230-circuit board, 231-conductive spring, 231A-connecting part, 231B-bending part, 232-conductive strip Ⅰ, 233-conductive strip Ⅱ, 234-connecting plate, 235-crown spring terminal, 240-conductive pin, 300-eyepiece, 310-eyepiece frame, 320-eyepiece lens assembly, 330-eyepiece sleeve. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0039] like Figures 1 to 12 As shown, the present invention includes an objective lens 100, a main lens body 200, and an eyepiece 300. The main lens body 200 includes a V-shaped main lens frame 210. The main lens frame 210 has two built-in image intensifiers 220 and a circuit board 230 is provided between the image intensifiers 220. The object side of the main lens body 200 is detachably fixed with two objective lenses 100, and the image side of the main lens body 200 is detachably provided with an eyepiece 300.
[0040] The eyepiece 300 includes an eyepiece frame 310 detachably connected to the image side of the main lens body 200. Two sets of eyepiece lens assemblies 320 are arranged in the eyepiece frame 310. An eyepiece ferrule 330 is fixed to the end of the eyepiece frame 310 away from the main lens body 200.
[0041] The objective lens 100 includes an objective lens seat 110 that slides and extends into the main lens frame 210 and abuts the image intensifier 220, an objective lens group 120 that is threadedly connected on the image side and extends into the objective lens seat 110, an objective lens pressure ring 130 that is threadedly connected and extends into the main lens frame 210 and abuts the objective lens seat 110, and a focusing hand wheel 140 fixedly mounted on the objective lens group 120. A flange 111 is provided on the image side of the objective lens seat 110, and the image side of the objective lens pressure ring 130 abuts the flange 111 with a sealing ring I 150 provided therebetween.
[0042] The objective lens assembly 120 includes an objective lens barrel 121, an objective lens assembly 122, a front pressure ring 123 detachably fixedly arranged on the object side of the objective lens barrel 121 and abutting against the objective lens assembly 122, a lens frame 124 for fixing the objective lens, and objective lens spacers I 125, II 126, and III 127 for separating the objective lenses.
[0043] The objective lens group 122 is provided with a first lens 122A, a second lens 122B, a third lens 122C, a fourth lens 122D, a fifth lens 122E, a sixth lens 122F, and a seventh lens 122G, which are arranged in sequence along the optical path from the object side to the image side. The objective lens barrel 121 is a four-step hollow shaft with a diameter decreasing from the object side to the image side. The second lens 122B, the third lens 122C, and the fourth lens 122D form a first cemented lens, and the fifth lens 122E and the sixth lens 122F form a second cemented lens. The second cemented lens is fixedly mounted in the lens frame 124 and is arranged in the second step hole on the image side of the objective lens barrel 121 through the objective lens spacer III 127. The first cemented lens is slidably arranged in the second step hole on the object side of the objective lens barrel 121 and is abutted against the lens frame 124 through the objective lens spacer II 126. The first lens 122A is slidably arranged in the first step hole on the object side of the objective lens barrel 121 and is abutted against the first cemented lens through the objective lens spacer I 125. The image side of the front pressure ring 123 abuts against the first lens 122A.
[0044] The first lens 122A, the second lens 122B, and the fifth lens 122E are all meniscus lenses with a convex object side surface; the third lens 122C and the sixth lens 122F are both biconvex lenses; the fourth lens 122D is a biconcave lens; and the seventh lens 122G is a single concave lens with a concave object side surface and a flat image side surface. The first lens 122A is a positive refractive power objective lens, the first cemented lens is a negative refractive power objective lens, the second cemented lens is a positive refractive power objective lens, and the seventh lens 122G is a negative refractive power objective lens.
[0045] The object side opening of the objective lens barrel 121 is provided with a threaded hole I, the front pressure ring 123 is threadedly connected and embedded in the threaded hole I of the objective lens barrel 121 and abuts the first lens 122A, a sealing ring III 180 is provided between the front pressure ring 123 and the first lens 122A, and a decorative ring 160 is also sleeved on the outer circular surface of the object side of the objective lens barrel 121.
[0046] The objective lens mount 110 is a two-step hollow shaft with a diameter decreasing from the object side to the image side. The flange 111 is coaxially fixed on the image side end face of the objective lens mount 110. The image side step outer circumferential surface of the objective lens barrel 121 is threadedly connected and extends into the image side step hole of the objective lens mount 110. One of the step outer circumferential surfaces of the objective lens barrel 121 is movably extended into the object side step hole of the objective lens mount 110 and a sealing ring II 170 is sleeved on the step outer circumferential surface. ; The image side sliding sleeve of the focusing handwheel 140 is provided with a retaining ring group 190, and the retaining ring group 190 includes an open retaining ring 191, screws I 192 connecting the two sides of the opening of the retaining ring 191, and a guide pin 193 vertically fixed on the image side of the retaining ring 191. The retaining ring 191 is slidably sleeved on the focusing handwheel 140, and a guide hole is correspondingly provided on the object side of the objective lens pressure ring 130, and the guide pin 193 slides and extends into the guide hole of the objective lens pressure ring 130.
[0047] The retaining ring 191, main lens frame 210, objective lens barrel 121 and eyepiece lens frame 310 are made of aluminum alloy or glass fiber reinforced nylon, and each spacer and lens frame 124, focusing hand wheel 140, decorative ring 160 and eyepiece ferrule 330 are made of engineering plastic or glass fiber reinforced nylon.
[0048] Each lens in the objective lens assembly 122 is made of lightweight environmentally friendly glass material and coated with an anti-reflection film in the visible light to near infrared band.
[0049] like Figures 7 to 12 As shown, connecting cavities 211 are provided on the left and right sides of the interior of the main lens frame 210, and the two image intensifiers 220 are respectively slidably arranged in the two connecting cavities 211 of the main lens frame 210. The two connecting cavities 211 inside the main lens frame 210 are interconnected, and the upper and lower walls are respectively provided with corresponding card slots 212. The circuit board 230 is vertically arranged and the upper and lower ends are respectively pluggable and arranged in the card slots 212 on the upper and lower walls of the main lens frame 210. Two conductive springs 231 are fixed on the two side surfaces of the circuit board 230 at intervals. The conductive springs 231 on both sides of the circuit board 230 are respectively elastically abutted against the positive and negative poles of the two image intensifiers 220. The upper wall of the main lens frame 210 is penetrated by a conductive pin 240 electrically connected to the conductive spring 231 on the circuit board 230.
[0050] The conductive springs 231 on the side of the circuit board 230 are arranged on the upper and lower sides of the horizontal plane corresponding to the center of the image intensifier 220. The conductive springs 231 include a plate-shaped connecting portion 231A and a curved portion 231B. The connecting portion 231A is fixedly attached to the side of the circuit board 230, and the curved portion 231B protrudes from the surface of the circuit board 230 and can elastically abut the electrode 221 of the image intensifier 220; the image end of the curved portion 231B is connected to the connecting portion 231A, and the object end is suspended. The cross-section of the curved portion 231B is a "V"-shaped structure with the opening facing the circuit board 230, and the top end corresponds to the position of the electrode 221 of the image intensifier 220. The orthographic projection of the suspended end of the curved portion 231B on the side of the circuit board 230 is within the range of the connecting portion 231A.
[0051] The upper and lower conductive spring clips 231 on one side of the circuit board 230 can be elastically abutted against the positive and negative poles of the corresponding image intensifier 220, respectively, and the upper and lower conductive spring clips 231 on the other side can be elastically abutted against the negative and positive poles of the corresponding image intensifier 220, respectively. The conductive spring clips 231 on both sides of the circuit board 230 that are elastically abutted against the positive pole are electrically connected to each other and the conductive spring clips 231 that are elastically abutted against the negative pole are electrically connected to each other. The positive and negative conductive spring clips 231 of the circuit board 230 are electrically connected to the corresponding positive and negative conductive pins 240, respectively.
[0052] A conductive strip I 232 is vertically fixed on each side of the circuit board 230, and the upper ends of the two conductive strips I 232 are electrically connected to the conductive spring piece 231 on the same side. The two conductive strips I 232 pass through the circuit board 230 near the lower conductive spring piece 231 and are electrically connected to the conductive spring piece 231 at the lower part of the other side; a conductive strip II 233 is also horizontally fixed on each side of the circuit board 230 and extends to the image side end face close to the circuit board 230, one end of the conductive strip II 233 is electrically connected to the conductive strip I 232 on the same side and the other end is electrically connected to the corresponding conductive pin 240.
[0053] Grooves are vertically and / or horizontally provided on both side surfaces of the circuit board 230 , and the conductive strips I 232 and / or II 233 are fixedly disposed in the corresponding grooves with their top surfaces no higher than the side surfaces of the circuit board 230 .
[0054] The circuit board 230 mounted in the slot 212 of the main lens frame 210 extends toward the image side and has a connecting plate 234 fixed horizontally on its top. Two crown spring terminals 235 that cooperate with the conductive pins 240 are spaced apart on the upper surface of the connecting plate 234. The two crown spring terminals 235 are electrically connected to the corresponding positive and negative conductive spring clips 231, respectively.
[0055] The card slot 212 is a "U" - shaped or "V" - shaped slot. The card slot 212 on the upper wall of the main frame 210 is a stepped slot, and the depth of the object - side slot is less than that of the image - side slot. The upper end of the circuit board 230 is a stepped surface corresponding to the card slot 212 on the upper wall of the main frame 210, and the length of the object - side upper - end surface of the circuit board 230 is less than the object - side length of the card slot 212 on the upper wall of the main frame 210.
[0056] The part of the connection cavity 211 close to the object - side is in a columnar structure and slidably houses the object - side part of the image intensifier 220. The middle part of the connection cavity 211 and the side wall on the image - side far from the circuit board 230 are arc surfaces that can fit the outer circular surface of the image intensifier 220. The electrode 221 of the image intensifier 220 is arranged close to the image - side.
[0057] The working principle and process of the present utility model:
[0058] As Figures 1 to 12 shown, during use, light enters from the object - side of the first lens 122A, and successively undergoes refraction by the first cemented lens, the second cemented lens, and the seventh lens 122G, and enters the image intensifier 220 from the image - side of the seventh lens 122G. The image intensifier 220 amplifies the image signal and displays it on the rear side, and finally is received by the human eye through the eyepiece 300.
[0059] When it is necessary to adjust the focal length, rotating the focusing handwheel 140 drives the objective lens barrel 121 to rotate within the objective lens holder 110. Since the objective lens holder 110 is fixedly connected to the main frame 210 through the objective lens retaining ring 130, the focusing handwheel 140 and the objective lens barrel 121, together with the objective lens group 122 fixedly arranged therein, move forward or backward relative to the main frame 210, thereby changing the focal length of the incident image intensifier 220 to achieve zooming. During the forward or backward movement of the focusing handwheel 140, since the retaining ring group 190 is slidably arranged on the image - side of the focusing handwheel 140 and is connected to the objective lens retaining ring 130 through the guide pin 193, the focusing handwheel 140 is blocked by the retaining ring group 190 on the image - side, restricting the minimum distance between the objective lens barrel 121 and the image intensifier 220, thereby preventing the objective lens barrel 121 from colliding with the image intensifier 220 during the focusing process.
[0060] As Figures 7 to 12As shown, when assembling the main mirror body 200, the upper and lower ends of the circuit board 230 are first slid from the image side to the object side and clamped into the clamping slots 212 on the upper and lower walls of the main mirror frame 210. Then, the conductive pins 240 are slid through the through holes at the bottom of the dovetail groove 213 and the lower ends are inserted into the crown spring terminals 235 at the top of the circuit board 230. Subsequently, the two image intensifiers 220 are slid from the image side into the two connecting cavities 211 of the main mirror frame 210 respectively, so that the object side of the image intensifier 220 enters the columnar structure on the object side of the connecting cavity 211 and is positioned. At the same time, the electrode 221 of the image intensifier 220 elastically abuts against the conductive spring 231 on the circuit board 230, completing the installation of the main mirror body 200.
[0061] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A four-eye night vision device, comprising an objective lens (100), a main lens body (200), and an eyepiece (300), wherein the main lens body (200) comprises a main lens frame (210) of a V-shaped structure, wherein the main lens frame (210) has two image intensifiers (220) built therein and a circuit board (230) is arranged between the image intensifiers (220), the two objective lenses (100) are detachably fixed on the object side of the main lens body (200), and the eyepiece (300) is detachably arranged on the image side of the main lens body (200); The eyepiece (300) comprises an eyepiece frame (310) detachably connected to the image side of the main mirror body (200), two sets of eyepiece lens groups (320) are arranged in the eyepiece frame (310), and an eyepiece ferrule (330) is fixed to one end of the eyepiece frame (310) away from the main mirror body (200); Its characteristics are: The objective lens (100) comprises an objective lens seat (110) that slides and extends into the main lens frame (210) and abuts against the image intensifier (220), an objective lens group (120) that is threadedly connected on the image side and extends into the objective lens seat (110), an objective lens pressure ring (130) that is threadedly connected and extends into the main lens frame (210) and abuts against the objective lens seat (110), and a focusing hand wheel (140) that is fixedly sleeved on the objective lens group (120), wherein the image side of the objective lens seat (110) is provided with a flange (111), and the image side of the objective lens pressure ring (130) abuts against the flange (111), with a sealing ring I (150) provided therebetween.
2. The four-eye night vision device according to claim 1, characterized in that: The objective lens group (120) comprises an objective lens barrel (121), an objective lens group (122), a front pressure ring (123) detachably fixedly arranged on the object side of the objective lens barrel (121) and abutting against the objective lens group (122), a lens frame (124) for fixing the objective lens, and an objective lens spacer I (125), an objective lens spacer II (126), and an objective lens spacer III (127) for separating the objective lenses; The objective lens group (122) comprises a first lens (122A), a second lens (122B), a third lens (122C), a fourth lens (122D), a fifth lens (122E), a sixth lens (122F), and a seventh lens (122G) which are sequentially arranged along the optical path from the object side to the image side. The objective lens barrel (121) is a four-step hollow shaft with a diameter that decreases sequentially from the object side to the image side. The second lens (122B), the third lens (122C), and the fourth lens (122D) form a first cemented lens. The fifth lens (122E) and the sixth lens (122F) form a second cemented lens. The second cemented lens is fixedly sleeved in the lens frame (124) and is arranged in the second step hole on the image side of the objective lens barrel (121) with the seventh lens (122G) through the objective lens spacer ring III (127); the first cemented lens is slidably arranged in the second step hole on the object side of the objective lens barrel (121) and abuts against the lens frame (124) through the objective lens spacer ring II (126); the first lens (122A) is slidably arranged in the first step hole on the object side of the objective lens barrel (121) and abuts against the first cemented lens through the objective lens spacer ring I (125); the image side of the front pressure ring (123) abuts against the first lens (122A).
3. The four-eye night vision device according to claim 2, characterized in that: The first lens (122A), the second lens (122B) and the fifth lens (122E) are all meniscus lenses with a convex object side surface, the third lens (122C) and the sixth lens (122F) are all biconvex lenses, the fourth lens (122D) is a biconcave lens, and the seventh lens (122G) is a single concave lens with a concave object side surface and a flat image side surface; the first lens (122A) is a positive refractive power objective lens, the first cemented lens is a negative refractive power objective lens, the second cemented lens is a positive refractive power objective lens, and the seventh lens (122G) is a negative refractive power objective lens.
4. The four-eye night vision device according to claim 2, characterized in that: The objective lens mount (110) is a two-step hollow shaft with a diameter decreasing from the object side to the image side. The flange (111) is coaxially fixedly arranged on the image side end surface of the objective lens mount (110). The image side step outer circumferential surface of the objective lens barrel (121) is threadedly connected and extends into the image side step hole of the objective lens mount (110). One of the step outer circumferential surfaces of the objective lens barrel (121) is movably extended into the object side step hole of the objective lens mount (110) and a sealing ring II (170) is sleeved on the step outer circumferential surface. The focusing The image side sliding sleeve of the hand wheel (140) is provided with a retaining ring group (190), the retaining ring group (190) comprises an open retaining ring (191), screws I (192) connecting the two sides of the retaining ring (191) opening, and a guide pin (193) vertically fixedly arranged on the image side of the retaining ring (191); the retaining ring (191) sliding sleeve is arranged on the focusing hand wheel (140), and the object side of the objective lens pressure ring (130) is correspondingly provided with a guide hole, and the guide pin (193) slides and extends into the guide hole of the objective lens pressure ring (130).
5. The four-eye night vision device according to any one of claims 1 to 4, characterized in that: The main mirror frame (210) is provided with connecting cavities (211) on the left and right sides thereof. The two image intensifiers (220) are respectively slidably arranged in the two connecting cavities (211) of the main mirror frame (210). The two connecting cavities (211) are interconnected inside the main mirror frame (210), and the upper wall and the lower wall are respectively provided with card slots (212). The circuit board (230) is vertically arranged and the upper and lower ends are respectively pluggable and arranged in the card slots (212) on the upper wall and the lower wall of the main mirror frame (210). Two conductive springs (231) are fixed to the two side surfaces of the circuit board (230) at an upper and lower interval. The conductive springs (231) on both sides of the circuit board (230) are respectively elastically abutted against the positive and negative electrodes of the two image intensifiers (220). The upper wall of the main mirror frame (210) is penetrated by a conductive pin (240) electrically connected to the conductive springs (231) on the circuit board (230).
6. The four-eye night vision device according to claim 5, characterized in that: The conductive springs (231) on the side of the circuit board (230) are arranged on the upper and lower sides of the central horizontal plane corresponding to the image intensifier (220), and the conductive springs (231) include a plate-shaped connecting portion (231A) and a bent portion (231B). The connecting portion (231A) is fixedly fitted to the side of the circuit board (230), and the bent portion (231B) protrudes from the surface of the circuit board (230) and can elastically abut against the electrode (221) of the image intensifier (220). The image end of the bent portion (231B) is connected to the connecting portion (231A) and the object end is suspended. The cross section of the bent portion (231B) presents a "V"-shaped structure with its opening facing the circuit board (230), and the top end corresponds to the position of the electrode (221) of the image intensifier (220). The orthographic projection of the suspended end of the bent portion (231B) on the side of the circuit board (230) is within the range of the connecting portion (231A).
7. The four-eye night vision device according to claim 6, characterized in that: The upper and lower conductive spring sheets (231) on one side of the circuit board (230) can respectively elastically abut the positive and negative electrodes of the corresponding image intensifier (220), and the upper and lower conductive spring sheets (231) on the other side can respectively elastically abut the negative and positive electrodes of the corresponding image intensifier (220). The conductive spring sheets (231) on both sides of the circuit board (230) elastically abutting the positive electrode are electrically connected to each other and the conductive spring sheets (231) elastically abutting the negative electrode are electrically connected to each other. The positive and negative conductive spring sheets (231) of the circuit board (230) are respectively electrically connected to the corresponding positive and negative conductive pins (240).
8. The four-eye night vision device according to claim 7, characterized in that: A conductive strip I (232) is vertically fixed on each side of the circuit board (230), and the upper ends of the two conductive strips I (232) are electrically connected to the conductive spring sheet (231) on the same side. The two conductive strips I (232) pass through the circuit board (230) near the lower conductive spring sheet (231) and are electrically connected to the conductive spring sheet (231) at the lower part of the other side. A conductive strip II (233) is also horizontally fixed on each side of the circuit board (230) and extends to the image side end face close to the circuit board (230), and one end of the conductive strip II (233) is electrically connected to the conductive strip I (232) on the same side and the other end is electrically connected to the corresponding conductive pin (240).
9. The four-eye night vision device according to claim 5, characterized in that: A circuit board (230) is mounted in the slot (212) of the main lens frame (210) and extends toward the image side. A connecting plate (234) is horizontally fixed to the top of the connecting plate (234). Two crown spring terminals (235) that cooperate with the conductive pins (240) are arranged at intervals on the upper surface of the connecting plate (234). The two crown spring terminals (235) are electrically connected to the corresponding positive and negative conductive springs (231), respectively.
10. The four-eye night vision device according to claim 6, characterized in that: The portion of the connecting cavity (211) close to the object side is in a columnar structure and slides to house the object side portion of the image intensifier (220). The middle portion of the connecting cavity (211) and the side wall on the image side away from the circuit board (230) are arc surfaces that can fit the outer surface of the image intensifier (220). The electrode (221) of the image intensifier (220) is arranged close to the image side.