Filter switcher with good impact resistance

Abstract

The utility model relates to a filter switcher with good shock resistance. The switcher comprises a base, a filter tray and a driving mechanism for driving the filter tray to move back and forth, the upper surface of the base is provided with a guide sliding groove for the filter tray to slide back and forth, the left side wall and the right side wall of the guide sliding groove are both provided with limiting protrusions, and the upper surface of the filter tray is attached to the limiting protrusions in a sliding mode. A containing groove and a first light transmitting opening are sequentially formed in the bottom face of the guide sliding groove from front to back, and the driving mechanism is arranged in the containing groove. The driving mechanism comprises a horizontally-arranged swing arm and a swing assembly for driving one end of the swing arm to swing front and back. A limiting column is vertically arranged at the swing end of the swing arm, a through hole matched with the limiting column is formed in the filter tray, the through hole is in a long strip shape and is formed in the left-right direction, and positioning grooves for positioning the limiting column are formed in the front inner wall and the rear inner wall of the through hole; the filter tray is simple in overall structure and small in size, and the shock resistance of the filter tray can be greatly improved through cooperation of the guide sliding grooves and the limiting protrusions.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, in particular to a filter switcher with good impact resistance. Background Art

[0002] The IR CUT (dual filter) spring assembly is a component installed in the IR CUT. It is an auxiliary tool for switching the IR CUT (filter). It is suitable for security surveillance cameras with this type of IR-CUT. At present, this type of IR-CUT dual filter means that a set of filters is built into the camera lens group. When the infrared sensing point outside the lens detects the change in the intensity of the light, the built-in IR-CUT can automatically switch the filter according to the intensity of the external light by the motor switching, so that the image can achieve the best effect. In other words, the filter can automatically switch the filter during the day or at night, so that the best imaging effect can be obtained regardless of whether it is day or night.

[0003] However, in the current multi-filter assembly, such as the filter switcher [CN220137532U] previously applied by the patentee, the lens tray adopts a driving mode of sliding back and forth by rotating the spiral member on the motor, and because the end of the lens tray close to the first guide member is not well guided and limited, it is only achieved by slightly clamping the first guide member by a first engaging member bent on the tray. This clamping and guiding method has a large gap in the length square of the first engaging member, which will cause the tray to shake during the reciprocating motion switching process, and the anti-vibration effect is poor. Therefore, we further propose a filter switching device with good stability. Utility Model Content

[0004] The purpose of the utility model is to provide a filter switcher with good impact resistance in view of the deficiencies in the prior art, and the filter switcher with good impact resistance can well solve the above-mentioned problems.

[0005] In order to achieve the above requirements, the technical solution adopted by the utility model to solve its technical problems is:

[0006] A filter switcher with good impact resistance is provided, which includes a base, a filter tray, and a driving mechanism that drives the filter tray to move forward and backward; the upper surface of the base is provided with a guide slide groove for the filter tray to slide forward and backward, and the left and right side walls of the guide slide groove are provided with limiting protrusions, and the upper surface of the filter tray slides in contact with the limiting protrusions; the bottom surface of the guide slide groove is provided with a receiving groove and a first light-transmitting port in sequence front and back, and the driving mechanism is arranged in the receiving groove; the driving mechanism includes a horizontally arranged swing arm, and a swing component that drives one end of the swing arm to swing back and forth; a limiting column is vertically provided on the swing end of the swing arm, and a through hole adapted to the limiting column is provided on the filter tray, the through hole is elongated and arranged along the left and right directions, and positioning grooves for positioning the limiting column are provided on the front and rear inner walls of the through hole.

[0007] The filter switcher with good impact resistance described in the utility model, wherein the left end of the through hole is provided with a stop position for the swing arm to stop, and the front and rear positioning grooves are respectively located on the right and left sides of the stop position.

[0008] The filter switcher with good impact resistance described in the utility model is characterized in that the upper surface of the swing arm is flush with the bottom surface of the guide slot, and the bottom surface of the guide slot is provided with a first avoidance groove for the swing end of the swing arm to swing in or out.

[0009] The filter switcher with good impact resistance described in the utility model is characterized in that the fixed end of the swing arm is located at the left end of the accommodating groove, the swing assembly is located at the right end of the accommodating groove, and the distance between the fixed end of the swing arm and the rear inner wall of the accommodating groove is less than the length of the swing arm.

[0010] The utility model describes a filter switcher with good impact resistance, wherein the swing assembly includes a U-shaped armature, a coil arranged on the U-shaped armature, and a magnet arranged between the two arms of the U-shaped armature; the magnet is rotatably connected to the bottom surface of the accommodating groove through a rotating shaft, the fixed end of the swing arm is fixedly connected to the rotating shaft, and the opposite side walls of the two arms of the U-shaped armature are provided with second avoidance grooves corresponding to the magnet for its rotation.

[0011] The utility model discloses a filter switcher with good impact resistance, wherein two arms of the U-shaped armature are arranged side by side front and back, and the coil is arranged on any one arm of the U-shaped armature.

[0012] The utility model discloses a filter switcher with good impact resistance, wherein the upper end of the limit column is provided with an extension portion extending laterally, the extension portion is perpendicular to the swing arm in different planes, and two extension portions are provided and arranged along the same horizontal straight line.

[0013] The utility model describes a filter switcher with good impact resistance, wherein support bars are provided on both left and right sides of the bottom surface of the guide slide groove, and the support bars are arranged along the front-to-back direction. There are multiple limiting protrusions on the left and right side walls of the guide slide groove and they are arranged along the front-to-back direction. When assembled in place, the upper and lower surfaces of the filter tray slide in a sliding fit with the limiting protrusions and the support bars respectively.

[0014] The utility model discloses a filter switcher with good impact resistance, wherein the switcher further comprises a sealing plate for sealing the filter tray in the guide groove, a second light-transmitting opening is provided on the sealing plate corresponding to the first light-transmitting opening, and the sealing plate is detachably connected to the base.

[0015] The utility model describes a filter switcher with good impact resistance, wherein, on the upper surface of the base, positioning steps are provided on the left and right sides of the guide slide groove, the front and rear ends of the positioning steps respectively penetrate the front and rear side walls of the base, the left and right ends of the sealing plate are respectively arranged on the two positionings, the front and rear ends of the sealing plate are provided with downwardly facing bending portions, and the bending portions are connected to the base by snaps.

[0016] The beneficial effect of the utility model is that the filter tray can be moved forward and backward by swinging the swing arm forward and backward, so that the filters arranged front and back on the filter tray can respectively face the first light-transmitting port, thereby realizing filter switching. The overall structure is simple and the volume is compact. Among them, the cooperation of the guide slide groove and the limiting protrusion can greatly improve the shock resistance of the filter tray, providing a strong guarantee for the switching of the filter; in addition, the cooperation of the two positioning grooves and the limiting column can play the role of positioning the filter tray when it moves into place, which can prevent the filter tray from shaking, and further improve the stability and anti-interference of the switcher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0018] Figure 1 It is a bird's-eye view of the filter switcher of the utility model with good impact resistance.

[0019] Figure 2 yes Figure 1 Exploded diagram.

[0020] Figure 3 yes Figure 2 A magnified view of the structure of the medium filter tray.

[0021] Figure 4 yes Figure 2 Enlarged view of the structure of the middle swing arm.

[0022] Figure 5 yes Figure 2 Another perspective view of the center base.

[0023] Figure 6 It is a top view of the local structure of the filter switcher of the utility model with good impact resistance. DETAILED DESCRIPTION

[0024] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0028] The filter switcher of the preferred embodiment of the utility model has good impact resistance, such as Figure 1-6As shown, the switch includes a base 10, a filter tray 20, and a driving mechanism 30 for driving the filter tray 20 to move forward and backward. The base 10 is circular, and the filter tray 20 is rectangular and arranged front to back, so as to facilitate the installation of multiple filters. Generally, at least two filters 200 arranged side by side front to back are arranged on the lens tray. A guide slot 40 is provided on the upper surface of the base 10 for the filter tray 20 to slide forward and backward. The left and right widths of the guide slot 40 are adapted to the left and right widths of the filter tray 20. Limiting protrusions 50 are provided on the left and right side walls of the guide slot 40. The upper surface of the filter tray 20 is slidably fitted with the limiting protrusions 50 to play the role of limiting and guiding the filter tray 20. In order to further improve the smoothness and wear resistance of the sliding of the filter tray 20, a Teflon coating can be added to the outer side of the filter tray 20 and the outer side of the limiting protrusion 50.

[0029] Furthermore, a receiving groove 60 and a first light-transmitting opening 70 are sequentially arranged on the bottom surface of the guide slide groove 40, and the front end of the filter tray 20 is directly opposite to the first light-transmitting opening 70 in the initial state. The driving mechanism 30 is arranged in the receiving groove 60, and the driving mechanism 30 includes a horizontally arranged swing arm 31, and a swing assembly 32 that drives one end of the swing arm 31 to swing forward and backward. A limit column 311 is vertically arranged on the swing end of the swing arm 31, and a through hole 21 adapted to the limit column 311 is arranged on the filter tray 20. The through hole 21 is in a long strip shape and arranged in the left and right direction to avoid the left and right movement of the limit column 311. The front and rear inner walls of the through hole 21 are both provided with positioning grooves 210 for positioning the limit column 311, which can position the limit column 311 after the filter tray 20 moves forward and backward into position. The filter tray 20 can be moved forward and backward by swinging the swing arm 31 forward and backward, so that the filters arranged front and back on the filter tray 20 can respectively face the first light-transmitting port 70, thereby realizing filter switching. The overall structure is simple and compact. The cooperation of the guide slide groove 40 and the limiting protrusion 50 can greatly improve the shock resistance of the filter tray 20, providing a strong guarantee for the switching of the filters. In addition, the cooperation of the two positioning grooves 210 and the limiting column 311 can play a role in positioning the filter tray 20 when it moves into place, thereby preventing the filter tray 20 from shaking, and further improving the stability and anti-interference of the switcher.

[0030] In this embodiment, a stop position 80 for the swing arm 31 to stop is provided at the left end of the through hole 21, and the front and rear positioning grooves 210 are respectively located on the right and left sides of the stop position 80, so that when the filter tray 20 moves backward into position, it is positioned by the positioning groove 210 on the left side of the stop position 80, and when the filter tray 20 moves forward into position, it can be positioned by the positioning groove 210 on the right side of the stop position 80, which can further effectively improve the stability of the filter tray 20.

[0031] In this embodiment, the upper surface of the swing arm 31 is flush with the bottom surface of the guide slot 40 to prevent the filter tray 20 from moving forward and backward. A first avoidance groove 90 is provided on the bottom surface of the guide slot 40 for the swing end of the swing arm 31 to swing in or out, so as to further reduce the front-to-back length of the overall structure, making the switcher more compact as a whole.

[0032] In this embodiment, the fixed end of the swing arm 31 is located at the left end of the accommodating groove 60, and the swing assembly 32 is located at the right end of the accommodating groove 60. The distance between the fixed end of the swing arm 31 and the rear inner wall of the accommodating groove 60 is smaller than the length of the swing arm 31, so that the filter tray 20 can be moved more in the front and rear directions. In addition, the front and rear layout of each structure can be further made more compact.

[0033] In this embodiment, the swing assembly 32 includes a U-shaped armature 321, a coil 323 arranged on the U-shaped armature 321, and a magnet 322 arranged between the two arms of the U-shaped armature 321; the magnet 322 is rotatably connected to the bottom surface of the accommodating groove 60 through the rotating shaft 100, and the fixed end of the swing arm 31 is fixedly connected to the rotating shaft 100. The opposite side walls of the two arms of the U-shaped armature 321 are provided with second avoidance grooves 3210 for the magnet 322 to rotate. When the coil 323 is energized, the U-shaped armature 321 can generate magnetism and thus its two arms can generate magnetic force on the magnet 322, thereby causing the magnet 322 to rotate under the action of the two magnetic fields, wherein the second avoidance groove 3210 can avoid the rotation of the magnet 322 to avoid collision, and the clockwise rotation and counterclockwise rotation of the magnet 322 can be switched by controlling the direction of the current in the coil 323 through an external device.

[0034] In this embodiment, the two arms of the U-shaped armature 321 are arranged side by side, and the coil 323 is arranged on any one arm of the U-shaped armature 321. Compared with the case where the coil 323 is arranged at the connection between the two arms, the occupied space in the left and right direction can be further reduced.

[0035] In this embodiment, a laterally extending extension portion 3110 is provided at the upper end of the limiting column 311. The extension portion 3110 is perpendicular to the swing arm 31 and is skewed from the plane. Two extension portions 3110 are provided and are arranged along the same horizontal straight line. Through the cooperation of the two extension portions 3110, the filter tray 20 can be prevented from being separated from the limiting column 311, thereby ensuring stability.

[0036] In this embodiment, support bars 110 are provided on both the left and right sides of the bottom surface of the guide slide groove 40, and the support bars 110 are arranged along the front-to-back direction. There are multiple limiting protrusions 50 on the left and right side walls of the guide slide groove 40 and they are arranged along the front-to-back direction. When assembled in place, the upper and lower surfaces of the filter tray 20 are slidably fitted with the limiting protrusions 50 and the support bars 110 respectively. Through the cooperation of the support bars 110 and the limiting protrusions 50, the friction between the filter tray 20 and the inner wall of the guide slide groove 40 can be reduced, thereby improving the smoothness of switching.

[0037] In this embodiment, the switch also includes a sealing plate 120 that seals the filter tray 20 in the guide slot 40. A second light-transmitting port 71 is provided on the sealing plate corresponding to the first light-transmitting port 70. In practice, the first light-transmitting port and the second light-transmitting port are both sealed by a transparent film. The sealing plate 120 is detachably connected to the base 10. Furthermore, positioning steps 130 are provided on the upper surface of the base 10 on both sides of the left and right sides of the guide slot 40. The front and rear ends of the positioning steps 130 penetrate the front and rear side walls of the base 10 respectively. The left and right ends of the sealing plate 120 are respectively provided on the two positionings so that the upper surface of the sealing plate 120 can be flush with the upper surface of the base 10 after assembly. The front and rear ends of the sealing plate 120 are provided with a downward bending portion 121. The bending portion 121 is connected to the base 10 by a buckle 140. Correspondingly, a snap-in hole 150 is provided on the bending portion corresponding to the buckle to facilitate disassembly and assembly.

[0038] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A filter switcher with good impact resistance, characterized in that: The switcher includes a base, a filter tray, and a driving mechanism for driving the filter tray to move forward and backward; the upper surface of the base is provided with a guide slide groove for the filter tray to slide forward and backward, and the left and right side walls of the guide slide groove are provided with limiting protrusions, and the upper surface of the filter tray slides in contact with the limiting protrusions; the bottom surface of the guide slide groove is provided with a receiving groove and a first light-transmitting port in sequence front and back, and the driving mechanism is arranged in the receiving groove; the driving mechanism includes a horizontally arranged swing arm, and a swing component for driving one end of the swing arm to swing back and forth; a limiting column is vertically provided on the swing end of the swing arm, and a through hole adapted to the limiting column is provided on the filter tray, the through hole is long and strip-shaped and is arranged in the left and right directions, and positioning grooves for positioning the limiting column are provided on the front and rear inner walls of the through hole.

2. The filter switcher with good impact resistance according to claim 1, characterized in that: A stop position for the swing arm to stop is provided at the left end of the through hole, and the front and rear positioning grooves are respectively located on the right and left sides of the stop position.

3. The filter switcher with good impact resistance according to claim 1, characterized in that: The upper surface of the swing arm is flush with the bottom surface of the guide slot, and the bottom surface of the guide slot is provided with a first avoidance slot for the swing end of the swing arm to swing in or out.

4. The filter switcher with good impact resistance according to claim 3, characterized in that: The fixed end of the swing arm is located at the left end of the receiving slot, the swing assembly is located at the right end of the receiving slot, and the distance between the fixed end of the swing arm and the rear inner wall of the receiving slot is less than the length of the swing arm.

5. The filter switcher with good impact resistance according to claim 1 or 4, characterized in that: The swing assembly includes a U-shaped armature, a coil arranged on the U-shaped armature, and a magnet arranged between the two arms of the U-shaped armature; the magnet is rotatably connected to the bottom surface of the accommodating groove through a rotating shaft, the fixed end of the swing arm is fixedly connected to the rotating shaft, and the opposite side walls of the two arms of the U-shaped armature are provided with second avoidance grooves corresponding to the magnet for its rotation.

6. The filter switcher with good impact resistance according to claim 5, characterized in that: The two arms of the U-shaped armature are arranged side by side front and back, and the coil is arranged on any one arm of the U-shaped armature.

7. The filter switcher with good impact resistance according to claim 1, characterized in that: An extension portion extending laterally is provided at the upper end of the limiting column, the extension portion is perpendicular to the swing arm and is skewed from the plane, and two extension portions are provided and arranged along the same horizontal straight line.

8. The filter switcher with good impact resistance according to claim 1, characterized in that: Support bars are provided on both sides of the left and right sides of the bottom surface of the guide slide groove, and the support bars are arranged along the front-to-back direction. There are multiple limiting protrusions on the left and right side walls of the guide slide groove and they are arranged along the front-to-back direction. When assembled in place, the upper and lower surfaces of the filter tray slide in a sliding fit with the limiting protrusions and the support bars respectively.

9. The filter switcher with good impact resistance according to claim 1, characterized in that: The switcher also includes a sealing plate for sealing the filter tray in the guide slot, a second light-transmitting opening is provided on the sealing plate corresponding to the first light-transmitting opening, and the sealing plate is detachably connected to the base.

10. The filter switcher with good impact resistance according to claim 9, characterized in that: Positioning steps are provided on the upper surface of the base on both sides of the left and right sides of the guide slide groove, and the front and rear ends of the positioning steps respectively penetrate the front and rear side walls of the base, and the left and right ends of the sealing plate are respectively arranged on the two positionings, and the front and rear ends of the sealing plate are provided with downward bending parts, and the bending parts are connected to the base by snaps.

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