Multi-optical filter switching device

Abstract

The utility model discloses a multi-optical-filter switching device comprising an installation box which is a cavity with an opening at the top and is internally provided with a rotary accommodating cavity; a plurality of optical filter mounting holes are formed in the middle of the rotary slide glass at equal intervals, the rotary slide glass is rotationally arranged in the rotary containing cavity, an angle recognition part is arranged on the outer side of the rotary slide glass and used for recognizing the rotation angle of the rotary slide glass, and a driving part is arranged above the rotary slide glass and used for driving the rotary slide glass to rotate. The beneficial effects of the utility model are that the angle position of the rotary slide glass can be accurately detected through the arrangement of the driving part and the soft magnetic sheet and the Hall effect sensor of the angle identification part; by means of the liftable cleaning cotton and the second motor for driving the cleaning cotton, when the internal ICR optical filter needs to be cleaned, the cleaning cotton can move downwards and make contact with the optical filter, then wiping is conducted through rotation, the cleanliness of the ICR optical filter is guaranteed, and the performance of equipment is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of filter switching, in particular to a multi-filter switching device. Background Technique

[0002] The ICR filter, also known as a dual-filter switch, is a key component in a surveillance camera, used to switch filters between day and night to optimize the imaging effect of the camera; when the light is sufficient during the day, the circuit control board drives the switch to switch to the infrared cut-off filter to ensure that the CCD restores the true color. When the light is insufficient at night, the infrared cut-off filter automatically moves away, and the full-spectrum filter starts to work, which can sense the auxiliary light of the infrared lamp at night and enhance the night vision ability.

[0003] The existing filter switching has low motion accuracy, cannot quickly position the rotation angle of the rotating carrier, and does not have a corresponding cleaning component to ensure the cleanliness of the filter. Content of the Utility Model

[0004] The purpose of the utility model is to provide a multi-filter switching device to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a multi-filter switching device, including:

[0006] An installation box, the installation box is a cavity with an opening at the top, and a rotation accommodation cavity is arranged inside the installation box;

[0007] A rotating carrier with a plurality of filter mounting holes equidistantly arranged in the middle, the rotating carrier is rotatably placed in the rotation accommodation cavity, an angle recognition part is arranged outside the rotating carrier for recognizing the rotation angle of the rotating carrier, and a driving part is arranged above the rotating carrier for driving the rotating carrier to rotate;

[0008] A cleaning part, the cleaning part is placed above the rotating carrier, and the cleaning part includes a liftable cleaning cotton and a second motor for driving the cleaning cotton to rotate.

[0009] Preferably, a box cover is fixedly connected to the top of the installation box, and a through hole is opened in the installation box and the box cover corresponding to the position of one of the mounting holes.

[0010] Preferably, the angle recognition part includes a soft magnetic sheet, soft magnetic sheets are installed at corresponding mounting hole positions outside the rotating carrier, and a Hall effect sensor is embedded inside the rotation accommodation cavity.

[0011] Preferably, the driving part includes two support plates fixedly connected to the inside of the mounting box, a worm is rotatably connected between the two support plates, the outer side of the worm is threadedly connected to a worm wheel, the center of the rotating carrier is fixedly connected to the worm wheel through a transmission shaft, and the outer side of the support plate is fixedly connected to a No. 1 motor connected to the worm.

[0012] Preferably, the cleaning part also includes a support frame fixedly connected to the inside of the installation box, the No. 2 motor is fixedly connected to the support frame, a rotating shaft with a limiting groove on the outer side is installed in the middle part of the support frame, the cleaning cotton is fixedly connected to the rotating shaft, and the No. 2 motor is connected to the rotating shaft through a transmission belt assembly.

[0013] Preferably, the transmission belt assembly includes two pulleys and a transmission belt mounted on the outside of the two pulleys for transmitting the two pulleys, the two pulleys are rotatably connected to the support frame, and one of the pulleys is slidably connected to the rotating shaft up and down.

[0014] Preferably, a lifting plate is rotatably connected to the top of the rotating shaft, and electromagnets are fixedly connected to the bottom of the lifting plate at positions corresponding to the support frame. When the two electromagnets are energized, their magnetic poles are opposite.

[0015] Preferably, the middle part of the lifting plate is slidably connected to a limit rod, the bottom of the limit rod is fixedly connected to the support frame, and a return spring is sleeved on the outer side of the limit rod and located between the lifting plate and the support frame.

[0016] Preferably, a dust collector head is installed at the bottom of the support frame on one side of the cleaning cotton.

[0017] Compared with the prior art, the utility model has the following beneficial effects: by setting a soft magnetic sheet and a Hall effect sensor of a driving part in cooperation with an angle recognition part, the angular position of a rotating carrier can be accurately detected; this ensures that the selected ICR filter can accurately stay at the required position, corresponding to the through hole at the top of the mounting box; the filter can be adjusted in real time according to the intensity of the ambient light; through the liftable cleaning cotton and the No. 2 motor driving it, when the internal ICR filter needs to be cleaned, the cleaning cotton can move downward and contact the filter, and then wipe it by rotating, thereby ensuring the cleanliness of the ICR filter and maintaining the performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is an enlarged view of point A of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the support plate of the utility model;

[0021] Figure 4 The structural schematic diagram of the lid of the utility model

[0022] Figure 5 The structural schematic diagram of the second motor of the utility model

[0023] Figure 6 The structural schematic diagram of the electromagnet of the utility model

[0024] In the figure: 1. Installation box; 2. Lid; 3. Rotation accommodating cavity; 4. Through hole; 5. Rotating carrier; 6. Soft magnetic sheet; 7. Hall effect sensor; 8. Support plate; 9. Worm gear; 10. Worm; 11. First motor; 12. Support frame; 13. Second motor; 14. Transmission belt assembly; 15. Rotating shaft; 16. Cleaning cotton; 17. Lifting plate; 18. Limiting rod; 19. Electromagnet; 20. Return spring; 21. Dust suction head Specific implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model

[0026] Please refer to Figure 1 、 2 As shown in FIGS. 3, 4, 5, and 6, the present utility model provides a technical solution: a multi-filter switching device, including: an installation box 1 and a rotating carrier 5 with a plurality of filter mounting holes equidistantly arranged in the middle. The installation box 1 is a cavity with an opening at the top, and a rotation accommodating cavity 3 is opened inside the installation box 1; the rotating carrier 5 is installed in the rotation accommodating cavity 3 through a transmission shaft. An angle recognition part is arranged on the outer side of the rotating carrier 5 for recognizing the rotation angle of the rotating carrier 5, and a driving part is arranged above the rotating carrier 5 for driving the rotating carrier 5 to rotate; a cleaning part is arranged above the rotating carrier 5. The cleaning part includes a liftable cleaning cotton 16 and a second motor 13 for driving the cleaning cotton 16 to rotate. The cleaning cotton 16 is made of a lens cleaning cloth or a microfiber cloth

[0027] It should be noted that in this utility model, the ICR filter is installed in the mounting hole in the middle of the rotating carrier 5. The driving part drives the rotating carrier 5 to rotate. According to the angle recognition part, the rotation position is judged, and the signal is transmitted to the control circuit board. The control circuit board controls the driving part to make the rotating carrier 5 stop at the specified position, so that the corresponding filter corresponds to the through hole 4. When it is necessary to clean the internal ICR filter, the cleaning cotton 16 is driven to move downward to contact the ICR filter, and then the cleaning cotton 16 is driven by the second motor 13 to wipe the ICR filter.

[0028] Please refer to Figure 1 、 4 As shown in the figure, a box cover 2 is fixedly connected to the top of the mounting box 1. The mounting box 1 and the box cover 2 are provided with a through hole 4 at the position corresponding to one of the mounting holes.

[0029] It should be noted that in this utility model, the ICR filter is driven to rotate by the rotating carrier 5, so that different ICR filters correspond to the through hole 4, and the transmission of the spectrum is adjusted according to the intensity of the ambient light.

[0030] Please refer to Figure 1 、 3 As shown in the figure, the angle recognition part includes a soft magnetic sheet 6. Soft magnetic sheets 6 are installed on the outer side of the rotating carrier 5 corresponding to the mounting hole positions, and a Hall effect sensor 7 is embedded and installed inside the rotating accommodation cavity 3.

[0031] It should be noted that in this utility model, the soft magnetic sheet 6 is installed on the outer side of the rotating carrier 5, corresponding to the position of the mounting hole. The soft magnetic sheet can provide a detectable physical mark through its magnetic quality to indicate the angular position of the rotating carrier; the Hall effect sensor 7 is installed inside the rotating accommodation cavity 3. The Hall effect sensor is a sensor that can detect the change of the magnetic field close to or passing through it. The change of the position of the soft magnetic sheet will affect the magnetic field detected by the sensor, so that the current angle of the rotating carrier 5 can be accurately determined; when the rotating carrier 5 rotates with the operation of the driving part, the position of the soft magnetic sheet 6 also changes accordingly; the Hall effect sensor 7 detects the position of the soft magnetic sheet 6 and feeds back different magnetic field change signals according to different positions; these signals are processed by the control circuit board to accurately control the driving part to stop the rotating carrier 5 at the required position to ensure that the selected ICR filter corresponds to the through hole 4.

[0032] Please refer to Figure 1 、 2 As shown in the figure, the driving part includes two support plates 8 fixedly connected inside the mounting box 1. A worm 10 is rotatably connected between the two support plates 8. A worm gear 9 is threadedly connected to the outer side of the worm 10. The center of the rotating carrier 5 is fixedly connected to the worm gear 9 through a transmission shaft. A first motor 11 connected to the worm 10 is fixedly connected to the outer side of the support plate 8.

[0033] It should be noted that the first motor 11 of the utility model provides power, and transmits the power to the worm wheel 9 through the worm 10. The transmission shaft transmits the rotation of the worm wheel 9 to the center of the rotating carrier 5, so that the rotating carrier will rotate with the rotation of the worm wheel. During the driving process, the Hall effect sensor of the angle recognition unit monitors the current angle position of the rotating carrier 5 to ensure that it stops at the correct ICR filter position to achieve accurate filter switching. The transmission system of the worm and worm wheel can achieve angle control to ensure that the ICR filter can accurately stay at the required position.

[0034] See also Figure 5 , 6 As shown, the cleaning part also includes a support frame 12 fixedly connected to the inside of the installation box 1, the No. 2 motor 13 is fixedly connected to the support frame 12, a rotating shaft 15 with a limiting groove on the outer side is installed in the middle of the support frame 12, and the cleaning cotton 16 is fixedly connected to the rotating shaft 15. The No. 2 motor 13 is connected to the rotating shaft 15 through a transmission belt assembly 14. The transmission belt assembly 14 includes two pulleys and a transmission belt mounted on the outer sides of the two pulleys for driving the two pulleys. The two pulleys are rotatably connected to the support frame 12, and one of the pulleys is connected to the rotating shaft 15 for sliding up and down.

[0035] It should be noted that the outer side of the rotating shaft 15 of the utility model is provided with a limiting groove along the length direction, and the middle part of one of the pulleys of the transmission belt assembly 14 is provided with a limiting protrusion that cooperates with the limiting groove, so that the rotating shaft 15 can slide up and down in the middle of the pulley and can also rotate with the pulley. The second motor 13 drives the rotating shaft 15 to rotate through the belt and pulley of the transmission belt assembly 14, and the rotating shaft 15 drives the cleaning cotton 16 to rotate, and the cleaning cotton 16 cleans the ICR filter.

[0036] See also Figure 5 , 6 As shown, the top of the rotating shaft 15 is rotatably connected to a lifting plate 17, and the bottom of the lifting plate 17 and the corresponding position of the support frame 12 are fixedly connected with an electromagnet 19. When the two electromagnets 19 are energized, the magnetic poles are opposite, and the middle part of the lifting plate 17 is slidably connected to a limit rod 18, and the bottom of the limit rod 18 is fixedly connected to the support frame 12. A return spring 20 is sleeved on the outer side of the limit rod 18 and located between the lifting plate 17 and the support frame 12. A dust collector head 21 is installed on one side of the cleaning cotton 16 at the bottom of the support frame 12.

[0037] It should be noted that the cleaning cotton 16 of the present utility model is located on the side close to the through hole 4. When cleaning the ICR filter, the first motor 11, the worm 10 and the worm gear 9 drive the rotating carrier 5 to rotate, so that the ICR filter to be cleaned is placed below the cleaning cotton 16. The two electromagnets 19 are energized simultaneously, and a suction force is generated between the electromagnets 19, so that the lifting plate 17 moves downward along the limiting rod 18. The lifting plate 17 drives the rotating shaft 15 to move downward, so that the cleaning cotton 16 contacts and rotates to clean the ICR filter. The dust suction head 21 is connected to an external micro fan through an air duct to discharge air and dust. When the electromagnet 19 is powered off, the reset spring 20 drives the lifting plate 17 to reset.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0039] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0040] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "set", "connected", "fixed", "swiveling connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0041] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-filter switching device, characterized in that: include: An installation box (1), the installation box (1) is a cavity with an opening at the top, and a rotation accommodating cavity (3) is provided inside the installation box (1); A rotating carrier (5) is provided with a plurality of filter mounting holes at equal intervals in the middle, the rotating carrier (5) is rotatably placed in the rotating accommodating cavity (3), an angle identification portion is provided on the outer side of the rotating carrier (5) for identifying the rotation angle of the rotating carrier (5), and a driving portion is provided above the rotating carrier (5) for driving the rotating carrier (5) to rotate; A cleaning part is placed above the rotating carrier (5), and comprises a lifting cleaning cotton (16) and a second motor (13) for driving the cleaning cotton (16) to rotate.

2. The multi-filter switching device according to claim 1, characterized in that: A box cover (2) is fixedly connected to the top of the installation box (1), and a through hole (4) is provided at a position of the installation box (1) and the box cover (2) corresponding to one of the installation holes.

3. The multi-filter switching device according to claim 1, characterized in that: The angle recognition part comprises a soft magnetic sheet (6), and the soft magnetic sheet (6) is installed at the positions of the corresponding mounting holes on the outer side of the rotating carrier (5), and a Hall effect sensor (7) is embedded and installed inside the rotating accommodating cavity (3).

4. The multi-filter switching device according to claim 1, characterized in that: The driving part comprises two support plates (8) fixedly connected to the inside of the installation box (1), a worm (10) is rotatably connected between the two support plates (8), the outer side of the worm (10) is threadedly connected to a worm wheel (9), the center of the rotating carrier (5) is fixedly connected to the worm wheel (9) through a transmission shaft, and the outer side of the support plate (8) is fixedly connected to a No. 1 motor (11) connected to the worm (10).

5. The multi-filter switching device according to claim 1, characterized in that: The cleaning unit also includes a support frame (12) fixedly connected to the inside of the installation box (1), the second motor (13) is fixedly connected to the support frame (12), a rotating shaft (15) with a limiting groove on the outer side is installed in the middle of the support frame (12), the cleaning cotton (16) is fixedly connected to the rotating shaft (15), and the second motor (13) is connected to the rotating shaft (15) through a transmission belt assembly (14).

6. The multi-filter switching device according to claim 5, characterized in that: The transmission belt assembly (14) comprises two pulleys and a transmission belt sleeved outside the two pulleys for transmitting the two pulleys. The two pulleys are rotationally connected to the support frame (12), and one of the pulleys is slidably connected to the rotating shaft (15) up and down.

7. The multi-filter switching device according to claim 6, characterized in that: The top of the rotating shaft (15) is rotatably connected to a lifting plate (17), and the bottom of the lifting plate (17) and the position corresponding to the support frame (12) are fixedly connected to electromagnets (19), and when the two electromagnets (19) are energized, the magnetic poles are opposite.

8. The multi-filter switching device according to claim 7, characterized in that: The middle part of the lifting plate (17) is slidably connected to a limiting rod (18), the bottom of the limiting rod (18) is fixedly connected to the support frame (12), and a return spring (20) is sleeved on the outer side of the limiting rod (18) and located between the lifting plate (17) and the support frame (12).

9. The multi-filter switching device according to claim 8, characterized in that: A dust collecting head (21) is installed at the bottom of the support frame (12) on one side of the cleaning cotton (16).

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