Lens optical filter switching device for video acquisition

Abstract

The utility model discloses a lens optical filter switching device for video acquisition, and relates to the technical field of optical filter switching devices. The device comprises a bottom frame, a bearing groove and a sliding cavity are formed in the bottom frame, the bearing groove communicates with one end of the sliding cavity and is the same as the sliding cavity in width, and a cover plate is clamped and buckled to the upper end of the bottom frame; the switching plate is movably laid in the sliding cavity, and two optical filters are fixedly connected to the switching plate; and the bayonet socket is inserted in the bearing groove in a sliding mode, and an electromagnetic driving piece used for driving the switching plate to move in a reciprocating mode in the length direction of the sliding cavity is arranged on the bayonet socket and in the bearing groove. According to the invention, the electromagnetic driving part is arranged on the bayonet socket, the installation operation of independent parts in the bearing groove can be reduced, the assembly is more convenient, the manpower and time are saved, when the electromagnetic driving part drives the optical filter to switch, the power-on duration can be reduced, continuous power supply is not needed, a large amount of electric energy is saved, and resources are saved.

Description

Technical Field

[0001] The present application relates to the technical field of filter switching devices, and in particular to a lens filter switching device for video acquisition. Background Art

[0002] The most commonly used equipment for video capture is the camera. A filter device is usually installed in the camera to filter light sources of different colors in order to obtain a clearer picture. The most common filter switching device is the automatic switching of the infrared cutoff filter, that is, when there is sufficient light during the day, professional blue glass that filters infrared rays is used, and at night it is switched to an infrared anti-reflection filter through a switching device. By switching the two, the camera can capture clearer videos during the day and at night.

[0003] However, the existing filter switching device has the following problems:

[0004] 1. In the existing filter switching device, the driving structure generally adopts a bearing seat that is integrated with the frame, and it is troublesome to disassemble and replace the driving structure when repairing and replacing it;

[0005] 2. Most of the existing filter switching devices use a micro motor to drive the gear and rack transmission connection to drive the filter to move, or use a micro push rod as a driving source to directly push the filter to move back and forth. Both of these driving methods require the driving source to work continuously for a certain period of time to fully realize the switching operation, which consumes a lot of power resources;

[0006] 3. When producing the device, it is necessary to install the drive structure of the filter switching device. Because it has many component structures, the installation personnel need to remember the installation position to complete the installation. The installation requirements are high, which is not conducive to mass production and processing, and affects production efficiency;

[0007] Therefore, the utility model proposes a lens filter switching device for video acquisition. Utility Model Content

[0008] The purpose of this application is to solve the problems in the above-mentioned background technology, and provide a lens filter switching device for video acquisition.

[0009] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0010] A lens filter switching device for video acquisition, comprising:

[0011] A bottom frame, wherein a bearing groove and a sliding cavity are constructed in the bottom frame, the bearing groove is connected to one end of the sliding cavity and has the same width, and a cover plate is snap-fitted on the upper end of the bottom frame;

[0012] A switching plate is movably laid in the sliding cavity and has two filters fixedly connected thereto;

[0013] A plug-in seat is slidably inserted in the bearing slot, and an electromagnetic driving member for driving the switching plate to reciprocate along the length direction of the sliding cavity is arranged on the plug-in seat and in the bearing slot. When the electromagnetic driving member is energized, the switching plate moves in the direction opposite to the electromagnetic driving member, and returns to its original position otherwise;

[0014] The foolproof part includes a stopper fixedly connected to the middle of the bearing groove and used to abut against one of the corners of the socket, a convex block fixedly connected to the inner wall of the bearing groove and arranged opposite to the stopper and used to limit the socket, a plug rod mutually plugged with the socket is configured at the bottom of the bearing groove, and two clamping blocks located on the same side as the stopper are configured at the bottom of the bearing groove;

[0015] A positioning piece, wherein a through groove is constructed in the middle of the block, a cross bar is rotatably installed in the through groove, one end of the cross bar is constructed with a suction plate that magnetically cooperates with the electromagnetic driving part, and the other end of the cross bar is fixedly connected with a vertical block for blocking the switching plate, a support block arranged below the vertical block is fixedly connected in the bearing groove, and a support spring is connected between the support block and the vertical block.

[0016] Furthermore, the bottom frame comprises a flat frame, the sliding cavity is constructed in the flat frame, one end of the flat frame is fixedly connected to a mounting frame, the bearing groove is constructed in the mounting frame, and the top surface of the flat frame is flush with the top surface of the mounting frame.

[0017] Furthermore, three horizontal sides of the bottom frame are constructed with anti-idiot grooves, and the anti-idiot grooves are constructed with beveled clamping blocks. The cover plate includes a flat plate that is buckled on the upper end of the bottom frame, and the side of the flat plate is vertically constructed with a clamping ring that is inserted into the anti-idiot groove and engages with the beveled clamping block.

[0018] Furthermore, the bottom of the flat plate is configured with a groove for sleeve-fitting the upper opening of the bottom frame, and a rubber strip is fixedly connected to the inner edge of the groove.

[0019] Furthermore, the bottom of the sliding cavity is structured with two guide bars which are arranged opposite to each other and extend along the length direction of the sliding cavity, and the groove of the plate is structured with two interference bars which are arranged in the same direction as the guide bars, and the interference bars are arranged with an offset position above and below the guide bars.

[0020] Furthermore, one side of the switching plate is constructed with two guide grooves arranged opposite to the guide bar, and the guide grooves are arrayed with a plurality of arc-shaped protrusions that interfere with the guide bar along their length direction. The other side of the switching plate is constructed with two interference grooves arranged opposite to the interference bar, and the interference grooves are arrayed with a plurality of arc-shaped round protrusions that interfere with the interference bar along their length direction.

[0021] Furthermore, the electromagnetic drive component includes an electromagnet fixedly connected to the socket, one of the magnetic poles of the electromagnet is set upward, one end of the switching plate is fixedly connected to a permanent magnet plate located above the electromagnet, the permanent magnet plate and the electromagnet have the same magnetic pole on the opposite side, and an elastic pull rod is provided between one side of the switching plate and the bearing slot for pulling the switching plate to reset.

[0022] Furthermore, the elastic pull rod includes a column frame constructed on one side of the bearing groove, one side of the column frame is constructed with a through groove for the switching plate to slide through, one side of the switching plate is fixedly connected with a column slidably inserted in the column frame, and a reset spring is connected between the inner end of the column frame and the end of the column.

[0023] Furthermore, the suction plate includes a plastic plate vertically connected to the end of the cross bar, and an inclined iron sheet is fixedly connected to the bottom of the plastic plate. When the end of the cross bar connected to the plastic plate is flipped upward, the inclined surface of the iron sheet is completely in contact with the outer wall of the electromagnet.

[0024] Furthermore, the top of the vertical block is configured with an oblique angle surface which is arranged opposite to the switching plate, and one end of the oblique angle surface which faces the suction plate is configured with an arc angle.

[0025] The beneficial effects of this application are as follows:

[0026] 1. The present application can generate magnetic force in time after power is turned on through the electromagnetic driving component, and push the switching plate to move toward the inside of the sliding cavity, and limit the position of the switching plate through the clamping of the positioning component to complete the initial switching of the filter. After that, the electromagnetic driving component can be started again to make the positioning component disengage from the limit of the switching plate, so that the switching plate is reset to its original position, thereby completing the switching operation of the filter. The reciprocating movement only requires two short power-ons, and there is no need for continuous power supply, which saves a lot of electricity and saves resources.

[0027] 2. The present application installs a part of the electromagnetic drive component on the socket and provides an anti-foolproof component in the bearing slot to remind personnel of the installation position of the socket. This makes it more convenient to install the electromagnetic drive component as a whole in the bearing slot, saves assembly time, and facilitates subsequent overall disassembly and maintenance of the electromagnetic drive component, further increasing the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural diagram of this application;

[0029] Figure 2 It is a partial three-dimensional structural diagram of this application;

[0030] Figure 3 It is a three-dimensional structural diagram of the bottom frame of this application;

[0031] Figure 4 It is a three-dimensional structural diagram of the cover plate of this application;

[0032] Figure 5 This is another perspective three-dimensional structure diagram in the present application 4;

[0033] Figure 6 It is another partial three-dimensional structure diagram of the present application;

[0034] Figure 7 This is an exploded view of the three-dimensional structure of the elastic pull rod of the present application;

[0035] Figure 8 It is a three-dimensional structural diagram of the switchboard of this application;

[0036] Fig. 9 It is a three-dimensional structural diagram of the positioning member of this application;

[0037] Figure numerals: 1, bottom frame; 101, flat frame; 102, mounting frame; 103, foolproof groove; 104, bevel block; 2, bearing groove; 3, sliding cavity; 301, guide strip; 4, cover plate; 401, flat plate; 402, snap ring; 403, groove; 404, rubber strip; 405, resistance strip; 5, switching plate; 501, guide groove; 502, arc-shaped protrusion; 503, resistance groove; 504, arc-shaped round protrusion; 6, socket; 7, electromagnetic drive member; 701, electromagnet ; 702, permanent magnet plate; 703, elastic pull rod; 7031, column frame; 7032, through groove; 7033, plug column; 7034, reset spring; 8, foolproof part; 801, stop block; 8011, through groove; 802, convex block; 803, plug rod; 804, clamping block; 9, positioning part; 901, cross bar; 902, suction plate; 9021, plastic plate; 9022, iron sheet; 903, vertical block; 9031, bevel surface; 904, support block; 905, support spring. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0039] like Figure 1 , Figure 2 , Figure 3 and Fig. 9 As shown, a lens filter switching device for video acquisition proposed in one embodiment of the present application includes:

[0040] A bottom frame 1, wherein a bearing groove 2 and a sliding cavity 3 are constructed in the bottom frame 1, wherein one end of the bearing groove 2 and the sliding cavity 3 are connected and have the same width, and a cover plate 4 is snap-fitted on the upper end of the bottom frame 1;

[0041] The switch plate 5 is horizontally movably laid in the sliding cavity 3 and two filters are fixedly connected thereon. When the cover plate 4 is buckled on the upper end of the bottom frame 1, the bearing slot 2 and the sliding cavity 3 are both closed by the cover plate 4. At this time, the switch plate 5 is arranged parallel to the lower side of the cover plate 4. The switch plate 5 is movably arranged in the bearing slot 2 and the sliding cavity 3 as a whole, and a part of the switch plate 5 can reciprocate in the bearing slot 2 and the sliding cavity 3, thereby realizing the switching operation of the two filters.

[0042] The plug-in seat 6 is slidably inserted in the bearing groove 2, and the movement is a detachable plug-in in the vertical direction. An electromagnetic driving member 7 for driving the switching plate 5 to reciprocate along the length direction of the sliding cavity 3 is arranged on the plug-in seat 6 and in the bearing groove 2. A part of the electromagnetic driving member 7 is installed on the plug-in seat 6. It can be combined into an integral component during the production process of the device and then installed. The mounting brackets of the existing filter switching devices are all fixed structures. If you want to install the driving structure on it, you need to install small parts of each part separately. The space in the frame is small and it is inconvenient to operate. The plug-in seat 6 in the present device can be directly installed on the outside. The electromagnetic drive member 7 is installed thereon, and then the socket 6 is integrally inserted and installed in the bearing slot 2. The operation is more convenient, saving manpower and time. When the electromagnetic drive member 7 is energized, the switching plate 5 moves in the direction opposite to the electromagnetic drive member 7, and vice versa, it will return to its original position. The electromagnetic drive member 7 mainly drives the reciprocating movement of the switching plate 5 by converting electricity into magnetic force. It is briefly energized when working. Compared with the transmission of the gear and rack driven by the micro motor or the micro push rod directly pushing the switching plate 5 to switch the filter, it uses electricity for a shorter time and less electricity, which can save a lot of resources and reduce production costs.

[0043] The foolproof part 8 includes a stopper 801 fixedly connected to the middle of the bearing groove 2 and used to abut against one of the corners of the socket 6. The stopper 801 is used to divide the bearing groove 2 into two parts. A convex block 802 is fixedly connected to the inner wall of the bearing groove 2 and is arranged opposite to the stopper 801 and is used to limit the socket 6. The bottom of the bearing groove 2 is structured with a plug rod 803 that is mutually plugged with the socket 6. The bottom of the bearing groove 2 is structured with two clamping blocks 804 located on the same side as the stopper 801. The clamping block 804 is L-shaped and the horizontal end is arranged facing the same direction. The material of the clamping block 804 is elastic. The plastic material can be elastically deformed. A card slot is constructed on one side of the bottom of the socket 6 to be mutually engaged with the card block 804. When installing the socket 6, the plug-in angle of the socket 6 can be positioned by the plug rod 803, and then the stopper 801 and the convex block 802 are used to abut against both sides of the socket 6 when the socket 6 is inserted, so as to further limit its position. In this way, when installing the socket 6, the personnel only need to align the position and press down until it is mutually engaged with the card block 804, and no other operations are required, which saves a lot of judgment time and is more convenient.

[0044] The positioning member 9 and the stopper 801 are provided with a through slot 8011 in the middle, and a cross bar 901 is rotatably installed in the through slot 8011. One end of the cross bar 901 is provided with a suction plate 902 that cooperates with the magnetic force of the electromagnetic driving member 7. The other end of the cross bar 901 is fixedly connected with a vertical block 903 for blocking the switching plate 5. A supporting block 904 arranged below the vertical block 903 is fixedly connected in the bearing slot 2. A supporting spring 905 is connected between the supporting block 904 and the vertical block 903. Under normal circumstances, the vertical block 903 is always pushed toward the top of the switching plate 5 by the supporting force of the supporting spring 905. When the electromagnetic driving member 7 is energized, a magnetic force is generated. On the one hand, it drives the switching plate 5 to move toward the sliding cavity 3, and on the other hand, it moves from the suction plate 902 toward the electromagnetic driving member 7, causing the cross bar 901 to deflect up and down, and drives the vertical block 903 at the other end to rotate and move down to the bottom of the switching plate 5, thereby contacting the opposite side. When the switch plate 5 is completely moved to the other side of the vertical block 903, the electromagnetic driving part 7 is powered off, the suction plate 902 loses its magnetic force, and the cross bar 901 is reset by the elastic force of the supporting spring 905, so that the vertical block 903 is blocked at the end of the switch plate 5, completing the limiting effect, so as to facilitate the use of the filter. Subsequently, it is necessary to power on the electromagnetic driving part 7 again to generate magnetic force to absorb the suction plate 902, so that the vertical block 903 is out of the blocking range. It should be noted that the current at this time is smaller than the current of the previous power-on, so that the magnetic force generated by the electromagnetic driving part 7 is not enough to push the switch plate 5 but can absorb the suction plate 902 until the switch plate 5 moves to the top of the vertical block 903 and the power can be turned off. At this time, the filter on the switch plate 5 completes the switching operation, and the duration of the two power-on times is relatively short, which saves a lot of electric energy compared with the drive of the micro motor and the micro push rod.

[0045] like Figure 1 As shown, in some embodiments, the base frame 1 includes a flat frame 101, the sliding cavity 3 is constructed in the flat frame 101, one end of the flat frame 101 is fixedly connected to the mounting frame 102, the bearing groove 2 is constructed in the mounting frame 102, and the top surface of the flat frame 101 is flush with the top surface of the mounting frame 102. Since only the switching plate 5 is arranged in the sliding cavity 3, and the cover plate 4 is buckled on the outer side of the flat frame 101, the volume of the flat frame 101 can be greatly reduced. Reducing the thickness of the flat frame 101 not only saves resources, but also makes the overall structure of the camera device more compact.

[0046] like Figure 1 and Figure 4As shown, in some embodiments, three of the horizontal sides of the bottom frame 1 are constructed with anti-idiot grooves 103, which are concave in shape, and angled blocks 104 are constructed in the anti-idiot grooves 103. The cover plate 4 includes a flat plate 401 that is snapped on the upper end of the bottom frame 1, and the side of the flat plate 401 is vertically constructed with a snap ring 402 that is inserted into the anti-idiot groove 103 and snapped with the angled block 104. When installing the cover plate 4, personnel only need to align the snap ring 402 with the anti-idiot groove 103 for plugging, and the snap connection operation between the snap ring 402 and the angled block 104 can be completed, which saves the alignment operation and can avoid misalignment during the snap-on installation, thereby affecting the installation efficiency and increasing the convenience of the device.

[0047] like Figure 4-Figure 5 As shown, in some embodiments, a groove 403 for sleeved on the upper opening of the bottom frame 1 is constructed at the bottom of the flat plate 401, and a rubber strip 404 is fixedly connected to the inner edge of the groove 403. The contact area between the flat plate 401 and the bottom frame 1 can be increased by providing the groove 403, and the rubber strip 404 is provided in the groove 403. The extrusion and resistance of the rubber strip 404 can increase the sealing performance, reduce the entry of dust into the bottom frame 1, ensure the clarity of the filter, and increase safety.

[0048] like Figure 3 and Figure 5 As shown, in some embodiments, the bottom structure of the sliding cavity 3 is provided with two guide bars 301 which are arranged opposite to each other and extend along the length direction of the sliding cavity 3, and the groove 403 of the flat plate 401 is provided with two abutment bars 405 which are arranged in the same direction as the guide bars 301, and the abutment bars 405 and the guide bars 301 are arranged in an offset manner up and down. The bottom of the switching plate 5 is partially supported by the guide bar 301 at the bottom to reduce the contact area with the switching plate 5, thereby reducing the friction of the switching plate 5 during translation and increasing safety. The abutment bars 405 can be provided to limit the contact with the upper side of the switching plate 5, and the up and down movement of the switching plate 5 can be restricted without affecting the horizontal movement of the switching plate 5, thereby avoiding displacement during horizontal movement and increasing safety.

[0049] like Figure 2 , Figure 5 , Figure 6 and Figure 8As shown, in some embodiments, one side of the switching plate 5 is constructed with two guide grooves 501 arranged opposite to the guide bar 301, and a plurality of arc-shaped protrusions 502 that interfere with the guide bar 301 are arrayed along the length direction of the guide groove 501, and the other side of the switching plate 5 is constructed with two interference grooves 503 arranged opposite to the interference bar 405, and a plurality of arc-shaped convexities 504 that interfere with the interference bar 405 are arrayed along the length direction of the interference groove 503. The top surfaces of the guide bar 301 and the interference bar 405 are both arc surfaces, and the plurality of arc-shaped protrusions 502 and arc-shaped convexities 504 in the guide groove 501 and the interference groove 503 are in contact with the arc surfaces, which can greatly reduce the contact area therebetween without affecting its supporting effect, further reducing the friction when the switching plate 5 moves, thereby protecting the switching plate 5 and increasing the service life of the device.

[0050] like Figure 6 and Fig. 9 As shown, in some embodiments, the electromagnetic drive member 7 includes an electromagnet 701 fixedly connected to the socket 6, one of the magnetic poles of the electromagnet 701 is set upward, and one end of the switching plate 5 is fixedly connected to a permanent magnet plate 702 located above the electromagnet 701, and the permanent magnet plate 702 has the same magnetic pole as the opposite side of the electromagnet 701. According to the principle of magnetic field, like poles repel each other. After the electromagnet 701 is energized, a repulsive force is generated to push the permanent magnet plate 702 to move up and down, and the upper part of the switching plate 5 is limited by the cover plate 4, so the switching plate 5 can only move quickly toward the water direction. An elastic pull rod 703 is provided between one side of the switching plate 5 and the bearing slot 2 for pulling the switching plate 5 to reset. It should be noted that the current passed by the battery iron 701 at this time generates a repulsive force greater than the pulling force of the elastic pull rod 703. In conjunction with the horizontal impact inertia of the switching plate 5, it can pass over the vertical block 903 in the positioning member 9 and pass over a certain position. When the current is disconnected, the elastic pull rod 703 will pull the switching plate 5 to reset. At this time, the supporting spring 905 will also push the vertical block 903 to reset, thereby blocking the resetting operation of the switching plate 5 and completing the initial switching of the filter. After that, the electromagnet 701 needs to be energized for the second time. The current intensity at this time needs to be smaller than the first time, so that the repulsive force generated by the electromagnet is smaller than the pulling force of the elastic pull rod 703, and it can still adsorb the suction plate 902 in the positioning member 9, so that the vertical block 903 is out of the blocking position, and the switching plate 5 passes over the vertical block 903. At this time, the current is disconnected again, so that the elastic pull rod 703 can completely reset the switching plate 5 and complete the secondary switching of the filter.

[0051] like Figure 6-Figure 7As shown, in some embodiments, the elastic pull rod 703 includes a column frame 7031 constructed on one side of the bearing groove 2, the column frame 7031 extends along the length direction of the sliding cavity 3, and one side of the column frame 7031 is constructed with a through groove 7032 for the switching plate 5 to slide through, and one side of the switching plate 5 is fixedly connected with a plug column 7033 slidably inserted in the column frame 7031, and a reset spring 7034 is connected between the inner end of the column frame 7031 and the end of the plug column 7033. The column frame 7031 is provided to guide the plug column 7033 for sliding, so that it can only move along the length direction of the column frame 7031, and the through groove 7032 is provided to enable the switching plate 5 to move along the length direction of the column frame 7031 when the plug column 7033 moves. The reset spring 7034 provides pulling force for the plug column 7033, and can also provide a certain buffer when the switching plate 5 is reset to avoid direct impact on the side wall of the bottom frame 1, thereby increasing safety.

[0052] like Fig. 9 As shown, in some embodiments, the suction plate 902 includes a plastic plate 9021 vertically connected to the end of the cross bar 901, and an iron sheet 9022 arranged obliquely is fixedly connected to the bottom of the plastic plate 9021. When the end of the cross bar 901 connected to the plastic plate 9021 is flipped upward, the inclined surface of the iron sheet 9022 is completely in contact with the outer wall of the electromagnet 701. Under normal circumstances, the support spring 905 supports the vertical block 903 in a vertical state, and the plastic plate 9021 is also in a vertical state, while the iron sheet 9022 is tilted away from the electromagnet 701. When the electromagnet 701 is energized to generate magnetic force, the iron sheet 9022 is attracted by the magnetic force and flipped upward until it contacts and is adsorbed on the side wall of the electromagnet 701. The inclined setting can increase the area of ​​the iron sheet 9022 to which it is adsorbed and increase the adsorption strength. On the other hand, the flipping angle of the cross bar 901 can be limited to avoid crossing the electromagnet 701.

[0053] like Fig. 9 As shown, in some embodiments, the top of the vertical block 903 is constructed with an angled surface 9031 arranged opposite to the switching plate 5, and the end of the angled surface 9031 facing the suction plate 902 is constructed with an arc angle. When the electromagnet 701 does not completely absorb the suction plate 902, the vertical block 903 will contact the bottom of the switching plate 5, and the angled surface 9031 and the arc angle can reduce the contact friction with the switching plate 5, thereby reducing damage to the switching plate 5 and the filter, and increasing safety.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lens filter switching device for video acquisition, characterized in that: include: A bottom frame (1), wherein a bearing groove (2) and a sliding cavity (3) are formed inside the bottom frame (1), wherein one end of the bearing groove (2) and the sliding cavity (3) are connected and have the same width, and a cover plate (4) is snap-fitted on the upper end of the bottom frame (1); A switching plate (5) is movably laid in the sliding cavity (3) and has two filters fixedly connected thereto; A plug-in seat (6) is slidably inserted in the bearing slot (2), and an electromagnetic driving member (7) is provided on the plug-in seat (6) and in the bearing slot (2) for driving the switching plate (5) to reciprocate along the length direction of the sliding cavity (3). When the electromagnetic driving member (7) is energized, the switching plate (5) moves in a direction opposite to the electromagnetic driving member (7), and returns to its original position otherwise. The foolproof component (8) comprises a stopper (801) fixedly connected to the middle of the bearing groove (2) and used to abut against one of the corners of the plug socket (6); a convex block (802) fixedly connected to the inner wall of the bearing groove (2) and arranged opposite to the stopper (801) and used to limit the plug socket (6); a plug rod (803) mutually plugged with the plug socket (6) is constructed at the bottom of the bearing groove (2); and two clamping blocks (804) located on the same side as the stopper (801) are constructed at the bottom of the bearing groove (2); A positioning member (9), wherein a through groove (8011) is formed in the middle of the stopper (801), a cross bar (901) is rotatably mounted in the through groove (8011), one end of the cross bar (901) is formed with a suction plate (902) that magnetically cooperates with the electromagnetic driving member (7), the other end of the cross bar (901) is fixedly connected with a vertical block (903) for blocking the switching plate (5), a support block (904) disposed below the vertical block (903) is fixedly connected in the bearing groove (2), and a support spring (905) is connected between the support block (904) and the vertical block (903).

2. The lens filter switching device for video acquisition according to claim 1, characterized in that: The bottom frame (1) comprises a flat frame (101), the sliding cavity (3) is constructed in the flat frame (101), one end of the flat frame (101) is fixedly connected to a mounting frame (102), the bearing groove (2) is constructed in the mounting frame (102), and the top surface of the flat frame (101) is flush with the top surface of the mounting frame (102).

3. The lens filter switching device for video acquisition according to claim 2, characterized in that: The bottom frame (1) is provided with fool-proof grooves (103) on three horizontal sides thereof, and oblique angle clamping blocks (104) are provided in the fool-proof grooves (103). The cover plate (4) comprises a flat plate (401) which is buckled on the upper end of the bottom frame (1), and a clamping ring (402) which is inserted into the fool-proof grooves (103) and is buckled with the oblique angle clamping blocks (104) is vertically provided on the side of the flat plate (401).

4. The lens filter switching device for video acquisition according to claim 3, characterized in that: The bottom of the flat plate (401) is configured with a groove (403) for sleeve-fitting the upper opening of the bottom frame (1), and the inner edge of the groove (403) is fixedly connected with a rubber strip (404).

5. The lens filter switching device for video acquisition according to claim 4, characterized in that: The bottom of the sliding cavity (3) is structured with two guide bars (301) arranged opposite to each other and extending along the length direction of the sliding cavity (3); the groove (403) of the flat plate (401) is structured with two abutment bars (405) arranged in the same direction as the guide bars (301); the abutment bars (405) and the guide bars (301) are arranged in an offset manner in the upper and lower directions.

6. The lens filter switching device for video acquisition according to claim 5, characterized in that: One side of the switching plate (5) is configured with two guide grooves (501) arranged opposite to the guide strip (301), and the guide grooves (501) are provided with a plurality of arc-shaped protrusions (502) arranged in an array along the length direction thereof and abutting against the guide strip (301). The other side of the switching plate (5) is configured with two conflicting grooves (503) arranged opposite to the conflicting strip (405), and the conflicting grooves (503) are provided with a plurality of arc-shaped convex protrusions (504) arranged in an array along the length direction thereof and abutting against the conflicting strip (405).

7. The lens filter switching device for video acquisition according to claim 1, characterized in that: The electromagnetic drive member (7) comprises an electromagnet (701) fixedly connected to the socket (6), one of the magnetic poles of the electromagnet (701) being arranged upwards, one end of the switching plate (5) being fixedly connected to a permanent magnetic plate (702) located above the electromagnet (701), the magnetic poles of the permanent magnetic plate (702) being the same as those of the electromagnet (701) on one side opposite to the electromagnet (701), and an elastic pull rod (703) for pulling the switching plate (5) to reset is arranged between one side of the switching plate (5) and the bearing slot (2).

8. The lens filter switching device for video acquisition according to claim 7, characterized in that: The elastic pull rod (703) includes a column frame (7031) constructed on one side of the bearing groove (2), and one side of the column frame (7031) is constructed with a through groove (7032) for the switching plate (5) to slide through, and one side of the switching plate (5) is fixedly connected to a plug column (7033) slidably inserted in the column frame (7031), and a return spring (7034) is connected between the inner end of the column frame (7031) and the end of the plug column (7033).

9. The lens filter switching device for video acquisition according to claim 7, characterized in that: The suction plate (902) comprises a plastic plate (9021) vertically connected to the end of the cross bar (901), and an inclined iron sheet (9022) is fixedly connected to the bottom of the plastic plate (9021). When the end of the cross bar (901) connected to the plastic plate (9021) is turned upward, the inclined surface of the iron sheet (9022) is completely in contact with the outer wall of the electromagnet (701).

10. The lens filter switching device for video acquisition according to claim 9, characterized in that: The top of the vertical block (903) is configured with an oblique angle surface (9031) disposed opposite to the switching plate (5), and one end of the oblique angle surface (9031) facing the suction plate (902) is configured with an arc angle.

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