Image intensifier tube circuit board, image intensifier tube module, and night vision device

Abstract

The present application provides an image intensifier tube circuit board, an image intensifier tube module, and a night vision device. The image intensifier tube circuit board comprises a circuit substrate and an image intensifier tube electrical connection structure arranged on the circuit substrate. The image intensifier tube electrical connection structure comprises a positive spring contact and a negative spring contact which are fixedly arranged on the circuit substrate, and at least one of the following optionally arranged on the circuit substrate: an intermediate spring contact, a plug connector, and crown spring connectors. The arrangement of at least one of the intermediate spring contact, the plug connector, and the crown spring connectors enables electrical connection with image intensifier tubes of other models, thereby allowing compatibility with image intensifier tubes of multiple models, and allowing users to upgrade the performance of existing night vision devices by replacing existing image intensifier tubes with image intensifier tubes of different models.

Description

CRT circuit boards, CRT modules and night vision equipment

[0001] This invention claims priority to Chinese Patent Application No. 202411177390.X, filed on August 26, 2024, entitled "Catatube Circuit Board, Catatube Module and Night Vision Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of optical equipment technology, and in particular to a picture tube circuit board, a picture tube module and a night vision device. Background Technology

[0003] Night vision devices, as a common nighttime observation tool, greatly help users improve the efficiency of nighttime activities, target search, and identification. The working principle of night vision devices is to convert low-intensity light, which is invisible to the human eye, into visible light, and then amplify it through an optical system to improve brightness and clarity, allowing the human eye to easily identify and monitor targets.

[0004] Night vision devices use an image tube as their core component. Taking a low-light night vision device as an example, the image tube amplifies the faint moonlight, starlight, atmospheric glow, etc., reflected from the target scene, thereby obtaining a bright image of the scene that is visible to the human eye. The image tube of a low-light night vision device is an optoelectronic device composed of an intensifier tube and a high-voltage power supply through a potting process. The imaging principle is that the photocathode converts the optical image into an electronic image, and the electro-optical imaging system (electrode system) transmits the electronic image to the fluorescent screen. During the transmission process, the electron energy is amplified and the geometric size of the electronic image is scaled. The fluorescent screen completes the electro-optical conversion, that is, converts the electronic image into a visible light image. Its advantages lie in its continuous target surface, high resolution, clear imaging, and visual capabilities that are close to the visual effects of the human eye.

[0005] However, currently known night vision devices are all designed for a specific type of image tube. Different types of image tubes may differ in photoelectric parameters, external dimensions, and compatibility with the device. If the image tube model needs to be changed, the entire night vision device often needs to be replaced. As a result, known night vision devices cannot support the upgrade requirements of improving device performance by changing the image tube model.

[0006] Summary of the Invention

[0007] To address the existing technical problems, this application provides a picture tube circuit board, picture tube module, and night vision device that are compatible with various types of picture tubes.

[0008] In a first aspect, a cathode ray tube circuit board is provided, comprising:

[0009] Circuit board;

[0010] An image tube electrical connection structure is disposed on the circuit board. The image tube electrical connection structure includes a positive electrode spring and a negative electrode spring fixedly disposed on the circuit board, and at least one of the following that can be selectively disposed on the circuit board: a middle spring, a plug connector, and a crown spring connector.

[0011] In some embodiments, the image tube electrical connection structure includes a center spring piece detachably mounted on the circuit board, the center spring piece being used to connect corresponding to the center contact of a 3-contact image tube.

[0012] In some embodiments, the spring sheet is mounted on the circuit board via multiple crown spring connectors.

[0013] In some embodiments, the image tube circuit board further includes an image tube gain adjustment circuit disposed on the circuit board; the image tube gain adjustment circuit includes a first type of gain adjustment circuit formed by the connection of the three-contact image tube, the first type of gain adjustment circuit includes a first resistor, a second resistor and a third resistor connected in series, the second resistor is a sliding rheostat, and the moving contact of the sliding rheostat is a voltage gain terminal.

[0014] In some embodiments, the image tube electrical connection structure includes the crown spring connector disposed on the circuit board, the crown spring connector including four crown spring connectors for corresponding electrical connection with the EGAC board in a 2-contact image tube with an EGAC board.

[0015] In some embodiments, the image tube circuit board further includes an image tube gain adjustment circuit disposed on the circuit board; the image tube gain adjustment circuit includes a second type of gain adjustment circuit formed by the connection of the 2-contact image tube with EGAC board, the second type of gain adjustment circuit includes a first resistor, a second resistor and a third resistor connected in series, and a fourth resistor connected to a fixed contact of the second resistor near the end of the first resistor, the second resistor is a sliding rheostat, the moving contact of the sliding rheostat is the voltage gain terminal, and the end of the fourth resistor away from the fixed contact is the gain resistance parameter terminal.

[0016] In some embodiments, the image tube electrical connection structure includes a plug connector soldered onto the circuit board, the plug connector being used for corresponding insertion and connection with the three-wire plug of a 3-wire image tube.

[0017] In some embodiments, the image tube circuit board further includes an image tube gain adjustment circuit disposed on the circuit board; the image tube gain adjustment circuit includes a first type of gain adjustment circuit formed by the connection of the 3-wire image tube, the first type of gain adjustment circuit includes a first resistor, a second resistor and a third resistor connected in series, the second resistor is a sliding rheostat, and the moving contact of the sliding rheostat is a voltage gain terminal.

[0018] Secondly, a tube module is also provided, including:

[0019] Image tube, wherein the image tube is any one of the following: 3-contact image tube, 2-contact image tube with EGAC board, 3-line image tube, 2-contact image tube;

[0020] Image tube cylinder, including an annular cylindrical wall for receiving the image tube, wherein the cylindrical wall is provided with mounting holes;

[0021] In any embodiment of this application, the image tube circuit board is installed in the mounting hole, and the image tube electrical connection structure is electrically connected to the image tube housed in the image tube cylinder.

[0022] Thirdly, a night vision device is also provided, including:

[0023] Cable tray body;

[0024] The lens assembly includes the image tube module described in any embodiment of this application;

[0025] A bridge connector is used to rotatably connect the lens assembly to the bridge body, and the image tube circuit board is mounted and connected to the bridge connector by a fastener.

[0026] The image tube circuit board provided in the above embodiments includes an image tube electrical connection structure on the circuit board, comprising a positive electrode spring, a negative electrode spring, and at least one of a middle electrode spring, a plug connector, and a crown spring connector optionally disposed on the circuit board. The positive electrode spring and the negative electrode spring are configured to correspond to the positive and negative electrodes of different types of image tubes, while the middle electrode spring, the plug connector, and the crown spring connector can support electrical connection with other types of image tubes, thereby being compatible with multiple types of image tubes and supporting users to upgrade the performance of existing night vision devices by replacing different types of image tubes.

[0027] In the above embodiments, the image tube module and night vision device are based on the same concept as the corresponding image tube circuit board embodiments, and thus have the same technical effects as the image tube circuit board embodiments, which will not be repeated here. Attached Figure Description

[0028] Figure 1 is a front view of a picture tube circuit board in one embodiment.

[0029] Figure 2 is a three-dimensional structural diagram of the image tube circuit board in Figure 1.

[0030] Figure 3 is a front view of the picture tube circuit board in Figure 1 after the spring clip has been removed.

[0031] Figure 4 is a schematic diagram of the assembly of the image tube circuit board and the 2-contact image tube in one embodiment.

[0032] Figure 5 is a schematic diagram of the assembly of the image tube circuit board and the 3-contact image tube in one embodiment.

[0033] Figure 6 is a circuit diagram of the gain adjustment circuit of the first embodiment.

[0034] Figure 7 is a schematic diagram of the assembly of the image tube circuit board and the 3-wire image tube in one embodiment.

[0035] Figure 8 is a circuit diagram of the gain adjustment circuit of the second form in one embodiment.

[0036] Figure 9 is a circuit diagram of the gain adjustment circuit in one embodiment.

[0037] Figure 10 is a schematic diagram of the assembly of the image tube circuit board and the 2-contact image tube with EGAC board in one embodiment.

[0038] Component Symbol Explanation

[0039] Image tube circuit board 100, circuit board 10, image tube electrical connection structure 20, positive electrode spring 21, negative electrode spring 22, middle spring 23, fixed end 231, electrode end 233, plug connector 24, crown spring connector 25, first crown spring connector 251, second crown spring connector 252, third crown spring connector 253, fourth crown spring connector 254, fifth crown spring connector 255, sixth crown spring connector 256, image tube 30, positive electrode 31, negative electrode 32, middle contact 33, image tube cylinder 50, bridge connector 60;

[0040] The first resistor is R1, the second resistor is R2, the third resistor is R3, and the fourth resistor is R4. Embodiments of the present invention

[0041] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] In the following description, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0044] In the following description, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In the following description, the phrase "some embodiments" refers to a subset of all possible embodiments. It should be noted that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0046] In the following description, the terms "first, second, third" are used merely to distinguish similar objects and do not represent a specific order or number of objects. It is understood that "first, second, third" may be interchanged in order or sequence where permitted, so that the embodiments of this application described herein can be implemented in a sequence other than that illustrated or described herein.

[0047] Please refer to Figures 1 to 3, which illustrate a picture tube circuit board 100 provided in an embodiment of this application, including a circuit board 10 and a picture tube electrical connection structure 20. The picture tube electrical connection structure 20 is disposed on the circuit board 10 and includes a positive electrode spring 21 and a negative electrode spring 22 fixedly disposed on the circuit board 10, and at least one of the following that may be selectively disposed on the circuit board 10: a middle spring 23, a plug connector 24, and a crown spring connector 25.

[0048] Referring to Figure 4, the positive electrode spring 21 and the negative electrode spring 22 can be fixedly disposed on the circuit board 10 by welding. The positions of the positive electrode spring 21 and the negative electrode spring 22 on the circuit board 10 are usually determined according to the positions of the positive electrode 31 and the negative electrode 32 of the image tube 30 after the image tube 30 and the image tube circuit board 100 are installed in the preset positions, so as to ensure that the positive electrode spring 21 and the negative electrode spring 22 can directly contact and electrically connect with the positive and negative electrodes located on the outer surface of the image tube 30.

[0049] The option to be disposed on the circuit board 10 means that at least one or more of the following are disposed on the circuit board 10: a middle spring 23, a plug connector 24, and a crown spring connector 25. The placement of the middle spring 23, the plug connector 24, and the crown spring connector 25 can respectively support the electrical connection of at least another type of image tube 30, thereby supporting the user's need to replace at least another type of image tube 30.

[0050] The image tube circuit board 100 provided in the above embodiment includes an image tube electrical connection structure 20 disposed on the circuit board 10, comprising a positive electrode spring 21, a negative electrode spring 22, and at least one of a middle spring 23, a plug connector 24, and a crown spring connector 25 optionally disposed on the circuit board 10. The positive electrode spring 21 and the negative electrode spring 22 are configured to correspond to the positive and negative electrodes of different models of image tubes 30, while the middle spring 23, the plug connector 24, and the crown spring connector 25 can support electrical connection with other models of image tubes 30, thereby being compatible with multiple models of image tubes 30 and supporting users to upgrade the performance of existing night vision devices by replacing different models of image tubes 30.

[0051] In some embodiments, referring to FIG5, the image tube electrical connection structure 20 includes a spring-loaded contact 23 detachably mounted on the circuit board 10. The spring-loaded contact 23 is used to connect correspondingly to the middle contact 33 of the 3-contact image tube. The position of the spring-loaded contact 23 on the circuit board 10 is typically determined based on the position of the middle contact 33 of the 3-contact image tube after the 3-contact image tube and the image tube circuit board 100 are installed in a preset position, ensuring that the spring-loaded contact 23 can directly contact and electrically connect with the middle contact 33 located on the outer surface of the 3-contact image tube. The spring-loaded contact 23 is an accessory of the image tube circuit board 100. When the image tube circuit board 100 is used with other types of image tubes that are not 3-contact image tubes, the spring-loaded contact 23 is not mounted on the circuit board 10. However, when it is necessary to replace the 3-contact image tube, the spring-loaded contact 23 can be mounted on the circuit board 10. In this embodiment, the positive electrode 31, the middle contact 33, and the negative electrode 32 of the 3-contact image tube are arranged at intervals along its circumference. The protrusion height of the positive electrode spring 21 and the negative electrode spring 22 relative to the circuit board 10 is greater than the protrusion height of the middle spring 23 relative to the circuit board 10, so as to ensure that they can respectively contact and electrically connect with the positive electrode 31, the middle contact 33, and the negative electrode 32 on the outer circumference of the 3-contact image tube.

[0052] Optionally, the image tube circuit board 100 also includes an image tube gain adjustment circuit disposed on the circuit board 10. Referring to Figure 6, the image tube gain adjustment circuit includes a first-form gain adjustment circuit formed by a 3-contact image tube connection. Specifically, the circuit board 10 of the image tube circuit board 100 is electrically connected to the positive terminal 31, the middle contact 33, and the negative terminal 32 of the 3-contact image tube via a positive spring 21, a middle spring 23, and a negative spring 22. The first-form gain adjustment circuit includes a first resistor R1, a second resistor R2, and a third resistor R3 connected in series. The second resistor R2 is a sliding rheostat, and the moving contact of the sliding rheostat is the voltage gain terminal. The gain V_GAIN of the voltage gain terminal can be adjusted by the sliding rheostat, as shown in Formula 1 and Formula 2 below:

[0053] The resistance value of the second resistor R2 can be adjusted to change the gain to its maximum value V_GAIN. MAX and minimum value V_GAIN MIN The change between these values, and the maximum gain V_GAIN, can be achieved through the resistance values ​​of the first resistor R1 and the third resistor R3. MAX and minimum value V_GAIN MIN Adjustments.

[0054] In some embodiments, referring to FIG7, the image tube electrical connection structure 20 includes crown spring connectors 25 disposed on the circuit board 10. Each crown spring connector 25 includes at least four crown spring connectors 25 for corresponding electrical connection with the EGAC board 35 in a two-contact image tube with an EGAC (Electron Gun Array Control) board. The crown spring connectors 25 are pre-fixed at designated positions on the circuit board 10 to achieve a highly reliable electrical connection between the image tube circuit board 100 and the circuit devices mounted on the image tube circuit board 100. In this embodiment, the position of the crown spring connector 25 on the circuit board 10 can be determined according to the assembly position of the EGAC board 35 in the 2-contact image tube with the EGAC board after the EGAC board and the image tube circuit board 100 are installed in the preset position. This ensures that the four crown spring connectors 25 can be electrically connected to the four pins on the EGAC board 35. For easy distinction, the four crown spring connectors 25 that are electrically connected to the EGAC board 35 are specifically the first crown spring connector 251, the second crown spring connector 252, the third crown spring connector 253, and the fourth crown spring connector 254 as shown in Figure 3. It should be noted that the crown spring connector 25 refers to various connectors that can be preset on the circuit board 10 to achieve the functions of subsequent connection of circuit devices to realize conduction and fixation.

[0055] In some embodiments, the crown spring connector 25 further includes a plurality of crown spring connectors 25 for electrical connection with the corresponding middle spring 23. When it is necessary to replace the 3-contact image tube, the middle spring 23 can be mounted on the circuit board 10 using the crown spring connectors 25. For easy distinction, the two crown spring connectors 25 that are electrically connected to the middle spring 23 are specifically the fifth crown spring connector 255 and the sixth crown spring connector 256 as shown in FIG3. The middle spring 23 is generally elongated and includes a fixed end 231 for connection with the circuit board 10 and an electrical end 233 that protrudes outward from the fixed end 231 and is bent. The bent shape of the electrical end 233 is similar to the bent shape of the positive spring 21 and the negative spring 22, and is located on the same straight line of the circuit board 10 alongside the positive spring 21 and the negative spring 22. The fixed end 231 is provided with through holes that correspond to two crown spring connectors 25 on the circuit board 10 for connecting the middle spring piece 23. The fixing member passes through the through holes and is inserted into the corresponding crown spring connector 25, thereby detachably mounting the middle spring piece 23 on the circuit board 10.

[0056] Optionally, referring to Figure 8, the image tube circuit board 100 includes an image tube gain adjustment circuit disposed on the circuit board 10. Referring to Figure 9, the image tube gain adjustment circuit includes a second type of gain adjustment circuit formed by the connection of the 2-contact image tube with the EGAC board. Specifically, the circuit board 10 of the image tube circuit board 100 is electrically connected to the positive terminal 31, EGAC board 35 and negative terminal 32 of the 2-contact image tube with the EGAC board via a positive spring 21, a crown spring connector 25 and a negative spring 22. The second type of gain adjustment circuit includes a first resistor R1, a second resistor R2 and a third resistor R3 connected in series, and a fourth resistor R4 connected to a fixed contact of the second resistor R2 near the end of the first resistor R1. The second resistor R2 is a sliding rheostat, the moving contact of the sliding rheostat is the voltage gain terminal, and the end of the fourth resistor R4 away from the fixed contact is the gain resistance parameter terminal. By electrically connecting the pins on the EGAC board 35 to the four crown spring connectors 25 on the circuit board 10, the gain adjustment circuit shown in Figure 8 is adjusted to the second form of the gain adjustment circuit shown in Figure 9 through electrical connection. This allows for the adjustment of the resistance R0 between R_GAIN and V_GAIN, as shown in Formulas 3 and 4 below: R0 MAX =R2 + R4 (Formula 3) R0 MIN =R4 (Formula 4)

[0057] The resistance value of the second resistor R2 can be adjusted to change the resistance value R0 between R_GAIN and V_GAIN, while the maximum and minimum values ​​of R0 can be adjusted by adjusting the fourth resistor R4.

[0058] In some embodiments, referring to FIG10, the image tube electrical connection structure 20 includes a plug connector 24 soldered onto the circuit board 10. The plug connector 24 is used to connect to the three-wire plug 36 of the 3-wire image tube. The position of the plug connector 24 on the circuit board 10 is determined according to the position of the three-wire plug 36 of the 3-wire image tube after the 3-wire image tube and the image tube circuit board 100 are installed in the preset position, so as to ensure that the plug connector 24 can be directly connected to the three-wire plug 36 of the 3-wire image tube for electrical connection.

[0059] Optionally, referring again to Figure 8, the image tube circuit board 100 includes a gain adjustment circuit disposed on the circuit board 10. Referring again to Figure 6, the gain adjustment circuit includes a first-form gain adjustment circuit formed by connecting a 3-wire image tube. Specifically, the circuit board 10 of the image tube circuit board 100 is electrically connected to the positive terminal 31, the three-wire connector 36, and the negative terminal 32 of the 3-wire image tube via a positive contact 21, a plug connector 24, and a negative contact 22. The first-form gain adjustment circuit includes a first resistor R1, a second resistor R2, and a third resistor R3 connected in series. The second resistor R2 is a sliding rheostat, and the moving contact of the sliding rheostat is the voltage gain terminal. By electrically connecting the 3-wire image tube to the plug connector 24 on the image tube circuit board 100, the gain adjustment circuit shown in Figure 8 is adjusted to the first-form gain adjustment circuit shown in Figure 6 through the electrical connection method. The adjustment method of gain V_GAIN is the same as the gain adjustment method of the 3-contact image tube in the aforementioned embodiment, and will not be described again here.

[0060] Based on the foregoing embodiments, it is known that the image tube circuit board 100 has at least the following characteristics:

[0061] First, in addition to the positive electrode spring 21 and negative electrode spring 22 corresponding to the positive and negative electrodes of each type of image tube 30, the image tube electrical connection structure 20 of the circuit board 10 is also provided with plug connectors 24 and crown spring connectors 25 that are compatible with different types of image tubes 30, and a middle spring 23 that is detachably disposed on the circuit board 10. This allows users to replace different types of image tubes 30 according to their needs without replacing the equipment, in order to meet the needs of equipment performance upgrades.

[0062] Secondly, the circuit board 10 is equipped with a gain adjustment circuit compatible with different types of image tubes 30. After the circuit board 10 is electrically connected to different types of image tubes 30 through the image tube electrical connection structure 20, the gain adjustment circuit can be adjusted to achieve a preset gain adjustment mode. For example, by adding a spring contact 23 to electrically connect with a 3-contact image tube, the gain adjustment circuit shown in Figure 8 can be adjusted to the image tube gain adjustment circuit shown in Figure 6; by adding a three-wire plug 36 to electrically connect with a 3-wire image tube, the gain adjustment circuit shown in Figure 8 can be adjusted to the image tube gain adjustment circuit shown in Figure 6; by adding a crown spring connector 25 to electrically connect with a 2-contact image tube with an EGAC board, the gain adjustment circuit shown in Figure 8 can be adjusted to the image tube gain adjustment circuit shown in Figure 9, thus achieving the purpose of compatible selection and gain adjustment of multiple types of image tubes 30.

[0063] In another aspect, this application provides an image tube module, including: an image tube 30, which can be any one of the following: a 3-contact image tube, a 2-contact image tube with an EGAC board, a 3-wire image tube, or a 2-contact image tube. An image tube cylinder 50 includes an annular wall for housing the image tube 30, and the wall has mounting holes. An image tube circuit board 100, according to any embodiment of this application, is mounted within the mounting holes, and the image tube electrical connection structure 20 is correspondingly electrically connected to the image tube 30 housed within the image tube cylinder 50.

[0064] The image tube 30 is generally cylindrical in shape, and the image tube cylinder 50 forms a space that matches the shape and size of the image tube 30. The image tube circuit board 100 is rectangular and is located on one side of the image tube 30. The positive electrode spring 21 and the negative electrode spring 22 protrude towards the image tube 30, corresponding to the positions of the positive electrode 31 and the negative electrode 32 on the outer surface of the image tube 30. Based on the currently selected image tube model, the electrical connection structure 20 and the image tube 30 are further connected, as shown in Figure 5. If the currently selected image tube model is a 3-contact image tube, the spring piece 23 is connected to the circuit board 10, and the spring piece 23 corresponds to the position of the spring piece 33 on the outer surface of the 3-contact image tube. As shown in Figure 7, if the currently selected image tube model is a 2-contact image tube with an EGAC board, the crown spring connector 25, which is pre-set on the circuit board 10 and corresponds one-to-one with the four pins of the EGAC board 35, is plugged into the corresponding pins of the EGAC board 35 for electrical connection. As shown in Figure 10, if the currently selected image tube model is a 3-wire image tube, the plug connector 24, which is pre-set on the circuit board 10, is plugged into the corresponding three-wire plug 36 of the 3-wire image tube for electrical connection.

[0065] In another aspect, this application also provides a night vision device, referring again to Figures 4, 5, 7, and 10, including a cable tray body, a lens assembly, and a cable tray connector 60. The lens assembly includes the image tube module of this application embodiment. The cable tray connector 60 is used to rotatably connect the lens assembly to the cable tray body, and the image tube circuit board 100 is mounted and connected to the cable tray connector 60 by a fastener. The night vision device can be a low-light night vision device, and the lens assembly can include a left eye lens assembly and a right eye lens assembly corresponding to the two eyes respectively, each lens assembly including an image tube module. The bridge connector 60 corresponds one-to-one with the lens assembly. During assembly, the image tube circuit board 100 can be first secured to the bridge connector 60 with fasteners such as screws; then the image tube 30 is assembled inside the image tube cylinder 50, and the image tube circuit board 100 and the image tube cylinder 50 are secured with fasteners such as screws; then the bridge connector 60 is rotatably connected to the bridge body. In this way, the lens assembly is rotatably connected to the bridge body by using the bridge connector 60, thus completing the assembly of the entire machine.

[0066] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cathode ray tube circuit board (100), characterized in that, include: Circuit board (10); The image tube electrical connection structure (20) is disposed on the circuit board (10). The image tube electrical connection structure (20) includes a positive electrode spring (21) and a negative electrode spring (22) fixedly disposed on the circuit board (10), and at least one of the following can be selectively disposed on the circuit board (10): a middle spring (23), a plug connector (24), and a crown spring connector (25).

2. The image tube circuit board as described in claim 1, characterized in that, The image tube electrical connection structure (20) includes a middle spring (23) detachably mounted on the circuit board (10), the middle spring (10) being used to connect to the middle contact (33) of the 3-contact image tube.

3. The image tube circuit board as described in claim 2, characterized in that, The spring sheet (10) is mounted on the circuit board (10) via multiple crown spring connectors.

4. The image tube circuit board as described in claim 2, characterized in that, It also includes a picture tube gain adjustment circuit disposed on the circuit board (10); The image tube gain adjustment circuit includes a first-form gain adjustment circuit formed by the connection of the three-contact image tube. The first-form gain adjustment circuit includes a first resistor (R1), a second resistor (R2), and a third resistor (R3) connected in series. The second resistor (R2) is a sliding rheostat, and the moving contact of the sliding rheostat is the voltage gain terminal.

5. The image tube circuit board as described in claim 1, characterized in that, The image tube electrical connection structure (20) includes the crown spring connector (25) disposed on the circuit board (10), the crown spring connector (25) including four crown spring connectors for corresponding electrical connection with the EGAC board (35) in the 2-contact image tube with EGAC board.

6. The image tube circuit board as described in claim 5, characterized in that, It also includes a picture tube gain adjustment circuit disposed on the circuit board (10); The image tube gain adjustment circuit includes a second-form gain adjustment circuit formed by connecting the two-contact image tube with the EGAC board. The second-form gain adjustment circuit includes a first resistor (R1), a second resistor (R2), and a third resistor (R3) connected in series, and a fourth resistor (R4) connected to a fixed contact of the second resistor (R2) near the end of the first resistor (R1). The second resistor (R2) is a sliding rheostat, and the moving contact of the sliding rheostat is the voltage gain terminal. The fourth resistor (R4) is located away from the first resistor (R1). One end of the fixed contact is the gain resistor parameter terminal.

7. The image tube circuit board as described in claim 1, characterized in that, The image tube electrical connection structure (20) includes a plug connector (24) soldered onto the circuit board (10), which is used to connect to the three-wire plug (36) of the 3-wire image tube.

8. The cathode ray tube circuit board as described in claim 7, characterized in that, It also includes a picture tube gain adjustment circuit disposed on the circuit board (10); The image tube gain adjustment circuit includes a first-form gain adjustment circuit formed by the connection of the three-wire image tube. The first-form gain adjustment circuit includes a first resistor (R1), a second resistor (R2), and a third resistor (R3) connected in series. The second resistor (R2) is a sliding rheostat, and the moving contact of the sliding rheostat is the voltage gain terminal.

9. A picture tube module, characterized in that, include: Image tube (30), wherein the image tube (30) is any one of the following: 3-contact image tube, 2-contact image tube with EGAC plate, 3-line image tube, 2-contact image tube; Image tube (50) includes an annular cylindrical wall for receiving the image tube (30), and the cylindrical wall is provided with mounting holes; The image tube circuit board (100) as described in any one of claims 1 to 8 is installed in the mounting hole, and the image tube electrical connection structure (20) is electrically connected to the image tube (30) housed in the image tube cylinder (50).

10. A night vision device, characterized in that, include: Cable tray body; The lens assembly includes the image tube module as described in claim 9; A bridge connector (60) is used to rotatably connect the lens assembly to the bridge body, and the image tube circuit board (100) is mounted and connected to the bridge connector (60) by a fastener.

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