A dual filter switcher

Abstract

This utility model discloses a dual-filter switcher, comprising a front shell and a bottom shell. A movable plate is horizontally arranged on the inner side of the front shell and the bottom shell, respectively. One end of the movable plate is fixed to the inner side of the bottom shell by a bolt and can rotate horizontally around the bolt. Two lenses are horizontally fitted into the inner side of the movable plate, and a guide groove is formed between the two lenses on the upper surface of the movable plate. This technical solution reduces terminal wire materials, simplifies the assembly process, and encloses the switcher's circuitry within an internal space, reducing short-circuit defects caused by contact with the outside environment. It also effectively prevents open-circuit defects caused by scratches or pulling. Furthermore, by embedding a copper nut inside the bottom shell, this solution enhances the product's locking force and effectively prevents screws from being directly locked onto the plastic, thus avoiding problems such as stripped screw holes and cracking.

Description

Technical Field

[0001] This utility model relates to the technical field of filter switching equipment, specifically to a dual filter switcher. Background Technology

[0002] Infrared cameras are widely used in modern security monitoring. To achieve day and night operation, they typically employ a dual-filter switching mechanism. The basic principle is that during the day, when there is sufficient light, the switching mechanism places the infrared cut-off filter (IR-CutFilter) in front of the image sensor, effectively filtering out infrared light and ensuring that the image sensor (CMOS / CCD) can acquire a color image with true color and high fidelity. At night or in low light conditions, the switching mechanism removes the IR-Cut filter, allowing the anti-reflective (AR) lens to operate.

[0003] This combination allows for efficient transmission of a broad spectrum of light, including a large amount of infrared light, while the AR lens effectively reduces halos and ghosting, and improves contrast. This enables the image sensor to make full use of the auxiliary illumination of the infrared fill light, thereby significantly improving the image quality, brightness and signal-to-noise ratio in low-light environments.

[0004] Currently, one of the mainstream solutions for achieving the above functions is the pendulum-type dual filter switcher. This switcher typically consists of a filter holder (on which an IR-Cut filter and a lens group consisting of an IR / AR lens are fixed), an external electromagnetic drive mechanism, and an independent control circuit board.

[0005] Its working principle is as follows: The control circuit board detects the ambient light intensity through sensors such as photoresistors and outputs a control signal. This signal is transmitted to an external electromagnet or micro motor through terminal wires and connectors, driving it to produce mechanical action. This, in turn, uses a physical lever to swing the filter holder back and forth in a "pendulum" manner, thereby switching the positions of the two sets of optical lenses.

[0006] However, this traditional pendulum switcher has many inherent defects, which seriously restrict production efficiency, product cost control, and long-term reliability:

[0007] The external drive mechanism of the switcher must establish an electrical connection with the control system through additional terminal harnesses and connectors. This not only increases the material cost of the wires, terminals, and connectors themselves, but also introduces several processes that are difficult to fully automate in the production and assembly process, such as soldering, plugging, wiring, and cable management, which significantly increases labor costs and assembly time, resulting in high overall costs.

[0008] The exposed pendulum-type mechanical structure and physical contact drive method pose risks such as easy wear of moving parts, jamming due to evaporation of grease or intrusion of dust, and displacement or noise caused by vibration during transportation or use, which affect the long-term service life and stability of the product.

[0009] In view of the problems exposed in the use of current filter switching equipment, it is necessary to improve and optimize the structure of dual filter switchers. Utility Model Content

[0010] To solve the above-mentioned technical problems, this utility model provides a dual filter switcher, which has the characteristics of facilitating quick and stable switching of filters.

[0011] To achieve the above objectives, this utility model provides the following technical solution: a dual filter switcher, comprising a front shell and a bottom shell, wherein a movable plate is horizontally arranged on the inner side of the front shell and the bottom shell respectively, one end of the movable plate is fixed to the inner side of the bottom shell by a bolt post and can rotate horizontally around the bolt post, and two lenses are horizontally fitted on the inner side of the movable plate, and a guide groove is formed between the two lenses on the upper surface of the movable plate;

[0012] A wire frame is fitted inside the bottom shell, and a coil is sleeved on the outside of the wire frame. A deflectable crank is fitted inside the wire frame. A magnet is fitted inside one end of the crank inside the wire frame. The other end of the crank extends above the guide groove. A protrusion extends from the bottom surface of the free end of the crank and is fitted inside the guide groove. When the crank is deflected, it drives the lens to deflect, thereby enabling the lens to switch.

[0013] As a preferred technical solution of the dual filter switcher of this utility model, a magnetic sheet is also provided on one side of the wire frame, and a slot is also provided at the tail of the bottom shell, with the magnetic sheet fitted inside the slot.

[0014] As a preferred technical solution of the dual filter switcher of this utility model, the wire frame is symmetrically connected with PIN pins on the side away from the magnetic sheet. The free end of the PIN pin is bent and extended and is locked by a slot provided inside the face shell. A copper nut is fitted inside the bottom shell, and the free end of the bottom shell is welded to the copper nut. The two ends of the coil are respectively wound around the PIN pins.

[0015] As a preferred technical solution of the dual filter switcher of this utility model, the lens is provided in two parts, namely an IR lens and an AR lens.

[0016] As a preferred technical solution of the dual filter switcher of this utility model, the front shell and the bottom shell are tightly connected by a number of bolts.

[0017] As a preferred technical solution of the dual filter switcher of this utility model, one end of the crank extends to the inner side of the wire frame, and the end of the crank extends with a protrusion, and the crank is rotatably connected to the wire frame through the protrusion.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This technical solution reduces terminal wire materials, simplifies the assembly process, and encloses the switcher's circuitry in an internal space, reducing short circuit defects caused by contact with the outside world. It can also effectively prevent open circuit defects caused by scratches or pulling.

[0020] 2. This technical solution enhances the product's locking force by embedding a copper nut inside the bottom shell, effectively preventing the screws from being directly locked onto the plastic, thus avoiding problems such as stripped screw holes and cracking.

[0021] 3. By improving the assembly and positioning method of the wire frame semi-finished product, the technical solution can effectively avoid the rocker arm not switching and malfunctioning due to the wire frame being squeezed and deformed. Attached Figure Description

[0022] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 In this utility model Figure 1 A schematic diagram of the localized explosion structure;

[0025] Figure 3 For the present utility model Figure 2 Further schematic diagram of the exploded structure;

[0026] In the diagram: 1. Front shell; 2. Bottom shell; 3. Movable plate; 4. Lens; 5. Guide groove; 6. Wire frame; 7. Coil; 8. Crank handle; 9. Magnet block; 10. Magnetic plate; 11. Pin; 12. Copper nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0028] like Figure 1-3 As shown, the dual filter switcher disclosed in this utility model includes a front shell 1 and a bottom shell 2. A movable plate 3 is horizontally arranged on the inner side of the front shell 1 and the bottom shell 2 respectively. One end of the movable plate 3 is fixed to the inner side of the bottom shell 2 by a bolt post and can rotate horizontally around the bolt post. Two lenses 4 are horizontally fitted on the inner side of the movable plate 3. A guide groove 5 is opened between the two lenses 4 on the upper surface of the movable plate 3.

[0029] A wire frame 6 is fitted inside the bottom shell 2, and a coil 7 is sleeved on the outside of the wire frame 6. A deflectable rocker 8 is fitted inside the wire frame 6. A magnet 9 is fitted inside one end of the rocker 8 inside the wire frame 6. The other end of the rocker 8 extends above the guide groove 5. A protrusion extends from the bottom surface of the free end of the rocker 8 and is fitted inside the guide groove 5. During the deflection of the rocker 8, the lens 4 is deflected, thereby enabling the lens 4 to complete the switching. By improving the assembly and positioning method of the wire frame semi-finished product, the rocker arm failure to switch and malfunction caused by the wire frame being squeezed and deformed can be effectively avoided.

[0030] Specifically, a magnetic sheet 10 is provided on one side of the wire frame 6, and a slot is provided at the tail of the bottom shell 2. The magnetic sheet 10 is fitted into the slot. A PIN pin 11 is symmetrically connected on the side of the wire frame 6 away from the magnetic sheet 10. The free end of the PIN pin 11 is bent and extended and is held in place by a slot provided inside the top shell 1. A copper nut 12 is fitted inside the bottom shell 2, and the free end of the bottom shell 2 is welded to the copper nut 12. The two ends of the coil 7 are respectively wound around the PIN pin 11.

[0031] Specifically, there are two lenses 4, one for IR and one for AR. In this embodiment, staff can replace the lenses with different specifications according to their own needs.

[0032] Specifically, the front shell 1 and the bottom shell 2 are tightly connected by several bolts. In this embodiment, the bolts are used to maintain the airtightness of the two shells.

[0033] Specifically, one end of the crank 8 extends to the inner side of the wire frame 6, and the end of the crank 8 has a protrusion. The crank 8 is rotatably connected to the wire frame 6 through the protrusion. In this embodiment, the crank 8 can be deflected under the drive of magnetic force.

[0034] The working principle and usage process of this utility model: In the implementation process of this utility model, the filter switcher is first assembled. The operator first inserts the crank handle 8 into the square holes at both ends of the wire frame 6 and bends the two crank handles 8 at 90°. Then, the enameled copper wire is wound around the wire frame 6, and the wire ends are wound around the crank handles 8 on both sides respectively. The connection is then welded to connect the crank handle 8 and the enameled copper wire. After that, the magnet block 9 is installed on the crank handle 8 and fixed with glue.

[0035] Then, the crank handle 8 is aligned with the slot at the tail of the wire frame 6 and inserted, and the post of the crank handle 8 is snapped into the snap hole inside the wire frame 6; the lens 4 is first fixed to the corresponding position of the movable piece by the snap (the lens is divided into night vision lens and day vision lens); then the magnetic conductive sheet 10 is inserted into the magnetic conductive sheet slot at the tail of the bottom shell 2 into the copper nut 12 pre-embedded in the injection mold of the bottom shell.

[0036] The semi-finished PIN pin 11 of the wire frame 6, which was assembled with the crank handle 8 in the fourth step, is bent again and installed into the bottom shell 2. The bent PIN pin 11 should be embedded in the PIN pin groove and the contact point between the PIN pin 11 and the bottom shell 2 should be soldered.

[0037] The assembly and fixing method of the wire frame 6 and the bottom shell 2 has been improved. The previous four-sided clamping positioning has been changed to single-piece bone positioning at the bottom of the wire frame 6. This effectively prevents the crank handle 8 from not switching due to deformation of the wire frame 6 caused by the positioning size error on the four sides, and reduces the product defect rate. Then, the above-prepared movable piece semi-finished product is tilted, and the small bevel at the bottom is aligned with the top post of the crank handle 8 and inserted. The rocker arm post is inserted into the long groove of the movable piece 3. Then, the small hole at the top of the movable piece 3 is inserted into the post of the bottom shell 2. The front shell 1 is assembled onto the bottom shell 2 with the assembled semi-finished product, and the three fastening screws are tightened to complete the finished product assembly.

[0038] During use, the filter switcher generates a magnetic field by passing current through the wound coil 7. The generated magnetic field causes the crank handle 8 and the magnet block 9 to swing left and right. The hook of the crank handle 8 drives the movable plate 3 to form a pull switch, realizing the AR / IR lens switching function.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to further limit the present utility model. All equivalent changes made based on the description and drawings of the present utility model are within the protection scope of the present utility model.

Claims

1. A dual filter changer comprising a face case (1) and a bottom case (2), characterized in that: The inner side of the face shell (1) and the bottom shell (2) is provided with a movable piece (3). One end of the movable piece (3) is fixed to the inner side of the bottom shell (2) by a bolt column and can rotate horizontally around the bolt column. Two lenses (4) are horizontally fitted inside the movable piece (3). A guide groove (5) is provided between the two lenses (4) on the upper surface of the movable piece (3). A wire frame (6) is fitted inside the bottom shell (2), and a coil (7) is sleeved on the outside of the wire frame (6). A deflectable crank (8) is fitted inside the wire frame (6). A magnet (9) is fitted inside one end of the crank (8) inside the wire frame (6). The other end of the crank (8) extends above the guide groove (5). A protrusion extends from the bottom surface of the free end of the crank (8). The protrusion is fitted inside the guide groove (5). During the deflection of the crank (8), the lens (4) is deflected, thereby enabling the lens (4) to complete the switching.

2. A dual filter changer according to claim 1, characterized in that: A magnetic sheet (10) is also provided on one side of the wire frame (6), and a slot is also provided at the tail of the bottom shell (2), with the magnetic sheet (10) fitted inside the slot.

3. A dual filter changer according to claim 1, characterized in that: The wire frame (6) is symmetrically connected with a PIN pin (11) on the side away from the magnetic sheet (10). The free end of the PIN pin (11) is bent and extended and is locked by a slot provided inside the face shell (1). A copper nut (12) is fitted inside the bottom shell (2). The free end of the bottom shell (2) is welded to the copper nut (12). The two ends of the coil (7) are respectively wound around the PIN needle (11).

4. A dual filter changer according to claim 1, characterized in that: The lens (4) is provided in two parts, namely an IR lens and an AR lens.

5. A dual filter changer according to claim 1, characterized in that: The front shell (1) and the bottom shell (2) are tightly connected by several bolts.

6. A dual filter changer according to claim 1, characterized in that: One end of the crank (8) extends to the inside of the wire frame (6), and the end of the crank (8) has a protrusion. The crank (8) is rotatably connected to the wire frame (6) through the protrusion.

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