Optical filter switching device and optical system

Abstract

This invention discloses a filter switching device and optical system, including a support component, a filter holder, and a swing arm mechanism. The support component has a vertical sliding groove. The filter holder is placed in the sliding groove, with a filter interface at its lower end, where a filter is placed. A connector is provided at the upper end of the filter holder. The swing arm mechanism includes a swing arm and a power component. The power component is fixed to the support component and has a drive shaft connected to the swing arm. The swing arm has a cam groove forming a certain angle. The connector is embedded in the cam groove. This invention adjusts the working state of the filter through the structure formed by the support component, the swing arm, and the filter holder, simplifying the filter switching structure, reducing the size and weight of the device, and making the structure simple and easy to implement. During the switching process, the cam groove with a certain angle ensures that the instantaneous pressure angle of the filter at the cutting-in and cutting-out positions is zero, reducing the motor load, reducing power consumption, facilitating assembly and adjustment, and ensuring high reliability.

Description

Technical Field

[0001] This invention relates to the field of optoelectronic technology, and in particular to a filter switching device and optical system. Background Technology

[0002] Optical filters play a crucial role in various optical systems, such as infrared and television systems, and they often require switching. However, the miniaturization and weight reduction requirements of optical systems impose constraints on the size and weight of filter switching devices. Existing technologies typically result in large and heavy filter switching devices with complex structures and cumbersome assembly, making it difficult to meet the miniaturization and weight reduction needs of optical systems. Furthermore, the switching process of filter switching devices usually involves a pressure angle, placing significant load requirements on the switching device. Summary of the Invention

[0003] To address the problem that existing technologies cannot meet the requirements for miniaturization and lightweighting of filter switching devices, this invention mainly provides a filter switching device and optical system.

[0004] Therefore, the technical solution adopted by the present invention is as follows: A filter switching device is provided, including a support component, a filter holder, and a swing arm mechanism; wherein: The support component is provided with a vertically arranged sliding groove; The filter holder is placed in the sliding groove, and a filter interface is provided at the lower end of the filter holder, where a filter is placed; a connector is provided at the upper end of the filter holder. The swing arm mechanism includes a swing arm and a power assembly. The power assembly is fixed on the support component and has a drive shaft connected to the swing arm. The swing arm has a cam groove forming a certain angle. The connecting member is embedded in the cam groove. The swing arm rotates under the drive of the drive shaft, which drives the connecting member to move in the cam groove and drives the filter holder to move up and down in the sliding groove.

[0005] According to the above scheme, the supporting component also includes a base; the power component is specifically a motor, which is mounted on the base; the drive shaft is specifically a motor shaft, which is equipped with a coupling; and the swing arm is connected to the coupling by screws.

[0006] According to the above scheme, the supporting component also includes a limiting baffle, which is fixed to both sides of the sliding groove by screws to limit the movement trajectory of the filter holder in the sliding groove.

[0007] According to the above scheme, the support component also includes a switch base and a switch on the side of the base. The switch is fixed to the switch base with screws and is electrically connected to the motor for controlling the motor.

[0008] According to the above scheme, the switch is specifically a Hall switch.

[0009] According to the above scheme, a second magnetic attraction structure is also provided on the upper side of the sliding groove of the support component, and a first magnetic attraction structure is also provided on the top of the filter holder; the second magnetic attraction structure is used to magnetically connect with the first magnetic attraction structure to fix the position of the filter holder when the filter holder changes from the cutting-in state to the cutting-out state.

[0010] According to the above scheme, the support component also includes a bracket disposed on the base; the second magnetic structure includes a second magnet and a second magnet seat, the second magnet seat is fixed to the top of the bracket by screws, and the second magnet is glued to the second magnet seat.

[0011] According to the above scheme, the first magnetic attraction structure includes a first magnet, a first magnet base, and a magnet adsorption block; the magnet adsorption block is placed on the side of the upper end of the filter base corresponding to the second magnetic attraction structure, and is used to attract the second magnet; the first magnet base is placed on the other side of the upper end of the filter base, and the first magnet is glued to the first magnet base, and is used to attract the magnet adsorption block.

[0012] According to the above scheme, the connecting component specifically includes a guide pin and a sliding sleeve. The sliding sleeve is placed outside the guide pin in a nested manner and embedded in the cam groove of the swing arm.

[0013] An optical system is also provided, which uses the filter switching device described above to switch the filter cut-in and cut-out states.

[0014] The beneficial effects of this invention are as follows: This invention adjusts the working state of the filter through a structure composed of a support component, a swing arm, and a filter holder. When the filter needs to switch working states, only the power component is needed to provide power to rotate the swing arm, causing the connecting piece to move within the cam groove of the swing arm, which in turn drives the filter holder to move up and down within the sliding groove of the support component. This completes the filter's entry and exit in the optical path, simplifying the filter switching structure and process, making the structure simple and easy to implement, eliminating the need for complex accessories to assist in switching, and reducing the size and weight of the device. Furthermore, during the switching process, by setting a cam groove with a certain angle on the swing arm, the instantaneous pressure angle of the filter at the entry and exit positions is zero, reducing the motor load, reducing power consumption, and facilitating assembly and adjustment.

[0015] Furthermore, by setting a first magnetic attraction structure and a second magnetic attraction structure, the present invention can magnetically connect with the first magnetic attraction structure to fix the position of the filter holder when the filter holder changes from the cut-in state to the cut-out state, so as to maintain the working state of the filter more stably, avoid slippage, and improve the reliability of the filter switching state.

[0016] Furthermore, the present invention sets the connecting member as a combination structure of guide pin and sliding sleeve, so that the force of the cam groove inside the swing arm is converted into sliding friction when the swing arm rotates, which can effectively reduce the motor load. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the filter switching device according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the filter switching device according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the filter cutting state according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the filter cutting state according to an embodiment of the present invention.

[0018] In the figure: 1-support component, 101-sliding groove, 102-base, 103-limiting baffle, 104-switch base, 105-switch, 106-bracket, 107-second magnet, 108-second magnet base; 2—Filter holder; 201—Filter interface; 202—First magnet; 203—First magnet holder; 204—Magnet adsorption block; 205—Guide pin; 206—Sliding sleeve; 3—Swing arm mechanism, 301—Swing arm, 302—Cam groove, 303—Motor, 304—Coupling. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the problems of large size and heavy weight of existing filter switching devices, which make them difficult to meet the requirements of miniaturization and lightweight optical systems, this invention provides a filter switching device comprising: a support component 1, a filter holder 2, and a swing arm mechanism 3; wherein: The support component 1 includes a vertically arranged sliding groove 101; The filter holder 2 is placed in the sliding groove 101, and the lower end of the filter holder 2 is provided with a filter interface 201, in which a filter is placed; the upper end of the filter holder 2 is provided with a connector. The swing arm mechanism 3 includes a swing arm 301 and a power assembly. The power assembly is fixed on the support component and has a drive shaft connected to the swing arm 301. The swing arm 301 has a cam groove 302 forming a certain angle. The connecting member is embedded in the cam groove 302. The swing arm 301 rotates under the drive of the drive shaft, which drives the connecting member to move in the cam groove 302 and drives the filter holder 2 to move up and down in the sliding groove 101.

[0021] Specifically, the support component 1 of the switching device also includes a base 102; the power component is specifically a motor 303, which is mounted on the base 102; the drive shaft is specifically a motor shaft, on which a coupling 304 is mounted; and the swing arm 301 is connected to the coupling 304 by screws.

[0022] Specifically, the support component 1 of the switching device also includes a limiting baffle 103, which is fixed to both sides of the sliding groove 101 by screws. The limiting baffle 103 is used to restrict the movement trajectory of the filter holder 2 in the sliding groove 101, so that the filter holder 2 can only move up and down within the sliding groove to drive the filter 101.

[0023] Specifically, the support component 1 of the switching device also includes a switch base 104 and a switch 105 on the side of the base 102. The switch 105 is fixed to the switch base 104 by screws and is electrically connected to the motor 303 to control the switching state of the motor 303. Preferably, the switch in this embodiment is a Hall switch.

[0024] Specifically, the upper side of the sliding groove of the support component 1 of the switching device is also provided with a second magnetic attraction structure, and the top of the filter holder 2 is also provided with a first magnetic attraction structure; the second magnetic attraction structure is used to magnetically connect with the first magnetic attraction structure to fix the position of the filter holder 2 when the filter holder 2 changes from the cutting-in state to the cutting-out state.

[0025] Specifically, the base 102 of the switching device is also provided with a bracket 106. The second magnetic structure includes a second magnet 107 and a second magnet seat 108. The second magnet seat 108 is fixed to the top of the bracket 106 by screws, and the second magnet 107 is glued to the second magnet seat 108.

[0026] In addition, the first magnetic attraction structure includes a first magnet 202, a first magnet base 203, and a magnet adsorption block 204; the magnet adsorption block 204 is placed on the side of the upper end of the filter base 2 corresponding to the second magnetic attraction structure, and is used to attract the second magnet 107; the first magnet base 203 is placed on the other side of the upper end of the filter base 2, and the first magnet 202 is glued to the first magnet base 203, and is used to attract the magnet adsorption block 204.

[0027] Preferably, the connecting component of the switching device in this embodiment is specifically composed of a guide pin 202 and a sliding sleeve 203, wherein the sliding sleeve 203 is placed outside the guide pin 202 by nesting and is embedded in the cam groove of the swing arm 301 of the support component.

[0028] Specifically, the overall structural diagram of the switching device in this embodiment can be shown as follows: Figure 1 and Figure 2 As shown, the device includes a base 102, a motor 303 mounted on the base, a coupling 304 connected to the motor shaft, and a swing arm 301 locked to the coupling 304 by screws. A filter holder 2 is installed in the sliding groove 101 of the base 102. A limiting baffle 103 is connected to the base 102 by screws and limits the movement of the filter holder 2, ensuring that the filter holder 2 can only move up and down within the sliding groove 101. A guide pin 202 and a sliding sleeve 203 are mounted on the filter holder 2 by nuts, with the sliding sleeve 203 located within the cam groove 302 of the swing arm 301. The guide pin 202 and the sliding sleeve 203 convert the cam pair into sliding friction, effectively reducing the motor load. The swing arm 301 is designed with a cam groove 302 forming a certain angle. The normal of the cam groove 302 at the filter cutting-in and cutting-out positions is consistent with the movement direction of the filter holder 2, i.e., when the filter cuts in... The pressure angle at the two cut-in and cut-out positions is zero, which can effectively reduce the motor load. A switch base 104 is installed on the side of the base 102, and the Hall switch is locked onto the switch base 104 by screws. The first magnet base 203 is locked onto the filter base 2 by screws, and the first magnet 202 is glued onto the first magnet base 203. When the filter is in the two cut-in and cut-out positions, the first magnet 202 is exactly in the sensing area of ​​the Hall switch, thereby realizing the control of the motor. The magnetic adsorption block 204 is locked onto the filter base 2 by screws. The bracket 106 is installed on the base 102, and the second magnet base 108 is locked onto the bracket 106 by screws. The second magnet 107 is glued onto the second magnet base 108. When the filter is in the two cut-in and cut-out positions, the magnetic adsorption block 204 and the second magnet 107 are attracted to each other, thereby ensuring the position of the filter.

[0029] Specifically, during installation, first, the motor 303 is installed on the base 102, and then the coupling 304 is connected to the motor shaft; the filter is glued to the filter holder 2, the filter holder 2 is placed in the sliding groove 101 of the base 102, and the limiting baffle 103 is installed with screws; the guide pin 202 and the sliding sleeve 203 are installed with nuts, the swing arm 301 is installed with screws, and the guide pin and sliding sleeve are located in the cam groove 302; the first magnet 202 is glued to the first magnet holder 203, and the first magnet holder 203 is locked to the filter holder 2 with screws; the switch holder 104 is installed with screws, and the Hall switch is locked to the switch holder 104 with screws; the magnet adsorption block 204 is locked to the filter holder 2 with screws; the second magnet 107 is glued to the second magnet holder 108, the bracket 106 is installed, and the second magnet holder 108 is locked to the bracket 106 with screws.

[0030] Specifically, the working states of the filter switching device can be divided into cut-in state and cut-out state, such as... Figure 3 As shown, when the filter changes from the cut-in state to the cut-out state, the power component causes the swing arm to rotate counterclockwise, causing the connecting piece to move within the swing arm cam groove, which in turn drives the filter holder to move upward within the sliding groove; as Figure 4 As shown, when the filter changes from the cut-out state to the cut-in state, the power component causes the swing arm to rotate clockwise, causing the connecting piece to move in the swing arm cam groove, which in turn drives the filter seat to move downward in the sliding groove.

[0031] In addition, this embodiment of the invention also provides an optical system that uses the filter switching device described above to switch the filter cut-in and cut-out states.

[0032] This invention adjusts the working state of a filter using a structure consisting of a sliding groove, a swing arm, and a filter holder. When the filter needs to switch working states, a power component rotates the swing arm, causing the connecting piece to move within the cam groove of the swing arm. This, in turn, moves the filter holder up and down within the sliding groove of the support component, completing the state switch. This simplifies the filter switching structure, reduces the size and weight of the device, and makes the structure simple and easy to implement. Furthermore, during the switching process, the cam groove with a certain angle ensures that the instantaneous pressure angle of the filter at the cutting-in and cutting-out positions is zero, reducing the motor load, power consumption, and making assembly and adjustment convenient and highly reliable.

[0033] Furthermore, by setting a first magnetic attraction structure and a second magnetic attraction structure, the filter holder can be magnetically connected with the first magnetic attraction structure to fix the position of the filter holder when it changes from the cut-in state to the cut-out state, so that the working state of the filter can be maintained more stably and slippage can be avoided.

[0034] Furthermore, in this embodiment of the invention, the connecting member is configured as a combination structure of guide pin and sliding sleeve, so that the force of the cam groove inside the swing arm is converted into sliding friction when the swing arm rotates, which can effectively reduce the motor load.

[0035] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A filter switching device, characterized in that, It includes a support component (1), a filter holder (2), and a swing arm mechanism (3); wherein: The support component (1) is provided with a vertically arranged sliding groove (101); The filter holder (2) is placed in the sliding groove (101), and a filter interface (201) is provided at the lower end of the filter holder (2) for placing the filter; a connector is provided at the upper end of the filter holder (2); The swing arm mechanism (3) includes a swing arm (301) and a power component. The power component is fixed on the support component. The power component is provided with a drive shaft, which is connected to the swing arm (301). The swing arm (301) is provided with a cam groove (302) forming a certain angle. The connecting member is embedded in the cam groove (302). The swing arm (301) rotates under the drive of the drive shaft, which drives the connecting member to move in the cam groove (302), and further drives the filter holder (2) to move up and down in the sliding groove (101).

2. The filter switching device according to claim 1, characterized in that, The support component (1) also includes a base (102); the power component is specifically a motor (303), the motor (303) is mounted on the base (102), the drive shaft is specifically a motor shaft, a coupling (304) is mounted on the motor shaft, and the swing arm (301) is connected to the coupling (304) by screws.

3. The filter switching device according to claim 1, characterized in that, The support component (1) also includes a limiting baffle (103), which is fixed to both sides of the sliding groove (101) by screws to limit the movement trajectory of the filter holder (2) in the sliding groove (101).

4. The filter switching device according to claim 1, characterized in that, The support component (1) also includes a switch base (104) and a switch (105) on the side of the base (102). The switch (105) is fixed to the switch base (104) by screws and is electrically connected to the motor (303) for controlling the motor (303).

5. The filter switching device according to claim 4, characterized in that, The switch (105) is specifically a Hall switch.

6. The filter switching device according to claim 1, characterized in that, The upper side of the sliding groove (101) of the support component (1) is also provided with a second magnetic structure, and the top of the filter holder (2) is also provided with a first magnetic structure; the second magnetic structure is used to magnetically connect with the first magnetic structure to fix the position of the filter holder (2) when the filter holder (2) changes from the cutting-in state to the cutting-out state.

7. The filter switching device according to claim 6, characterized in that, The support component (1) also includes a bracket (106) disposed on the base (102); the second magnetic structure includes a second magnet (107) and a second magnet seat (108), the second magnet seat (107) is fixed to the top of the bracket (106) by screws, and the second magnet (107) is glued to the second magnet seat (108).

8. The filter switching device according to claim 7, characterized in that, The first magnetic attraction structure includes a first magnet (202), a first magnet base (203), and a magnet adsorption block (204); the magnet adsorption block (204) is placed on the side of the upper end of the filter base (2) corresponding to the second magnetic attraction structure, and is used to attract the second magnet (107); the first magnet base (203) is placed on the other side of the upper end of the filter base (2), and the first magnet (202) is glued to the first magnet base (203) for attracting the magnet adsorption block (204).

9. The filter switching device according to claim 1, characterized in that, The connector specifically includes a guide pin (202) and a sliding sleeve (203). The sliding sleeve (203) is placed outside the guide pin (202) by nesting and is embedded in the cam groove (302) of the swing arm (301).

10. An optical system, characterized in that, The system uses the filter switching device according to any one of claims 1-9 to switch the filter cut-in and cut-out states.

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