CN213581527U - Optical filter switching device based on dynamic scene video acquisition and video acquisition device - Google Patents

Abstract

The utility model is suitable for a video camera technical field. The utility model discloses a light filter auto-change over device and video acquisition device based on dynamic scene video acquisition, wherein the light filter auto-change over device based on dynamic scene video acquisition includes the light filter actuating mechanism that the drive light filter support removed, the light filter support is equipped with the bar conversion hole that turns into linear motion with light filter actuating mechanism rotary motion, and this bar conversion hole is equipped with limit structure, forms light filter support reverse movement locking when this limit structure cooperates with light filter actuating mechanism. The position of the optical filter support can be locked at the stop position of the moving part, so that the phenomenon of instability of the position of the optical filter support due to external vibration is avoided, and the image pickup effect is improved. Meanwhile, the components are not required to be added, the configuration relation among the original components is not required to be changed, the cost is saved, the size is not increased, and the structure is simple and compact.

Description

Optical filter switching device based on dynamic scene video acquisition and video acquisition device

Technical Field

The utility model relates to a video camera technical field, in particular to optical filter auto-change over device and video acquisition device based on dynamic scene video acquisition.

Background

The existing video acquisition device, such as a video camera, is in the process of making a video recording, and in order to overcome the influence of the external light environment on the image pickup effect, different optical filters are adopted in the video camera generally to adapt to the image pickup environment, so that a better image effect is generated, and different optical filters in the video camera generally realize automatic switching by enabling the optical filters to switch linear reciprocating motion through an optical filter switching device.

The camera device is usually applied to a relatively constant network in a static situation, and is in a static state after being installed and during working, if a monitoring camera is fixedly installed on a fixed object, such as a wall body and the like, the camera device cannot start vibration or move when being used, so that the existing optical filter switching device can keep the optical filter relatively fixed in the switched position by a self structure, and if the existing optical filter switching device is electrified, the swing arm generates a small moment effect. However, the optical filter is usually perpendicular to the optical path of the camera lens, and when the video acquisition device is installed in a dynamic situation, that is, in an unstable state caused by movement, such as when an aerial unmanned aerial vehicle is used for patrol shooting, the optical filter is affected by mechanical vibration and airflow of the optical filter and fluctuates, so that the optical filter switching device is easily affected by vibration or fluctuation, and the optical filter is in an unstable state, thereby affecting the shooting effect.

Aiming at the problem that the existing optical filter cannot lock the position, a locking mechanism is usually added for locking. Although the purpose of locking the position of the filter can be achieved, the size and the number of components of the switching device are inevitably increased due to the increase of the component structure, so that the assembly difficulty is increased, the cost is increased, and the size is increased. The switching device is usually arranged inside the camera device, and the trend of miniaturization of products results in very limited space for its installation, resulting in poor adaptability of the switching device to increased volume.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a light filter auto-change over device and video acquisition device based on dynamic scene video acquisition, and wherein light filter auto-change over device can avoid appearing undulant or vibration and make the light filter position unstable, reduces spare part quantity and cost when improving the effect of making a video recording, simple structure is compact.

In order to solve the problem, the utility model provides a light filter auto-change over device based on dynamic scene video acquisition, including light filter support and drive light filter support linear motion's light filter actuating mechanism, the light filter support is equipped with the bar conversion hole that turns into linear motion with light filter actuating mechanism rotary motion, the bar conversion hole is equipped with two limit structure of axial symmetry that use the bar conversion hole as the axle in light filter actuating mechanism's motion part locking position, and when every limit structure and light filter actuating mechanism cooperate, the light filter support makes the light filter support be in linear motion locking state to driving lever application of force driving lever.

The optical filter driving mechanism further comprises a driving part for driving the moving part to rotate, the moving part comprises a swing arm provided with a free end and a rotating end, the shift lever is arranged at the free end and matched with the strip-shaped conversion hole, and when the optical filter support is locked, the shift lever is positioned in a limiting groove of the limiting structure.

Furthermore, the driving part comprises a U-shaped iron core formed by two iron arms and a coil sleeved on one iron arm and connected with a control signal, and each iron arm is provided with an arc-shaped groove distributed around the rotating shaft of the annular permanent magnet.

Furthermore, the limiting groove comprises an arc-shaped limiting groove, and the arc-shaped limiting groove is smoothly connected with the strip-shaped conversion hole on one side of the swing arm away from the swing arm.

Further, the depth of the limiting groove is not less than 1/2 of the diameter of the deflector rod.

Furthermore, the arc-shaped limiting groove is a part of the motion track of the shifting lever when the swing arm rotates.

Furthermore, the driving lever is provided with an anti-falling protrusion matched with the limiting groove and the strip-shaped conversion hole.

Furthermore, the arc-shaped limiting groove arc is a part of the motion track of the free end when the swing arm rotates.

The utility model provides a video acquisition device, this video acquisition device include filter auto-change over device, filter auto-change over device includes the light filter actuating mechanism that the drive light filter support removed, the light filter support is equipped with the bar conversion hole that turns into linear motion with light filter actuating mechanism rotary motion, and this bar conversion hole is equipped with limit structure, forms light filter support reverse movement locking when this limit structure cooperates with light filter actuating mechanism.

The optical filter driving mechanism comprises a moving part and a driving part for driving the moving part to rotate, the moving part comprises a swing arm provided with a free end and a rotating end, the shift lever is arranged at the free end and matched with the strip-shaped conversion hole, and when the shift lever is positioned in the limiting structure, the optical filter support is in a reverse movement locking state.

Furthermore, the driving part comprises a U-shaped iron core formed by two iron arms and a coil sleeved on one iron arm and connected with a control signal, and each iron arm is provided with an arc-shaped groove distributed around the rotating shaft of the annular permanent magnet.

Furthermore, the limiting structure comprises a limiting groove, and the limiting groove is smoothly connected with the strip-shaped conversion hole on one side far away from the swing arm.

Further, the depth of the limiting groove is not less than 1/2 of the diameter of the deflector rod.

Furthermore, the two limiting grooves are respectively positioned on two sides of the strip-shaped conversion hole.

Furthermore, the driving lever is provided with an anti-falling protrusion matched with the limiting groove and the strip-shaped conversion hole.

Furthermore, the arc-shaped limiting groove arc is a part of the motion track of the free end when the swing arm rotates.

The utility model discloses a light filter auto-change over device and video acquisition device based on dynamic scene video acquisition, wherein the light filter auto-change over device based on dynamic scene video acquisition includes the light filter actuating mechanism that the drive light filter support removed, the light filter support is equipped with the bar conversion hole that turns into linear motion with light filter actuating mechanism rotary motion, and this bar conversion hole is equipped with limit structure, forms light filter support reverse movement locking when this limit structure cooperates with light filter actuating mechanism. When the moving part on the filter driving mechanism moves to the stopping point, the moving part is stably positioned at the stopping point. At the moment, the swing arm is just positioned in the limiting groove, when the optical filter support is disturbed by external force and/or self gravity, the optical filter support cannot reversely drive the swing arm 31 to move, and the optical filter support is in a locking state; when the switching is needed, the optical filter driving mechanism enables the moving part to leave the limiting structure, and the optical filter support is driven by the moving part to move to realize the switching. The position of the optical filter support can be locked at the stop position of the moving part, so that the phenomenon of instability of the position of the optical filter support due to external vibration is avoided, and the image pickup effect is improved. Meanwhile, the method does not need to increase parts or change the configuration relation among the original parts, thereby saving the cost and increasing the volume, and has simple and compact structure, stability and reliability.

Drawings

In order to illustrate more clearly the embodiments of the invention or the solutions of the prior art, reference will now be made briefly to the attached drawings that are needed in the description of the embodiments or the prior art, it being understood that the drawings in the description illustrate only some embodiments of the invention and are therefore not to be considered limiting of its scope, and that, to a person skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural diagram of an embodiment when the filter switching device is at the top dead center.

Fig. 2 is an exploded view of an embodiment of a filter switching device.

Fig. 3 is an enlarged schematic view of the structure of part C in fig. 2.

Fig. 4 is an enlarged schematic view of the structure of the swing arm embodiment.

FIG. 5 is a schematic structural diagram of the embodiment when the filter switching device is at the bottom dead center.

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The following claims are presented in conjunction with the detailed description of the invention and the accompanying drawings, it being understood that the embodiments described are only some embodiments of the invention and not all embodiments. Based on the embodiments of the present invention, those skilled in the art can find out all other embodiments without creative efforts, and all the embodiments also belong to the protection scope of the present invention.

It should be understood that in the embodiments of the present invention, all directional terms, such as "upper", "lower", "left", "right", "front", "back", etc., are used herein based on the orientation and position shown in the drawings or the orientation and position of the product, and are not intended to limit the present invention, but to simplify the description of the present invention. For the purpose of explaining only the relative positional relationship between the respective components, the movement, and the like, as shown in the drawings, when the specific posture is changed, the directional indication may be changed accordingly.

Furthermore, the use of ordinal numbers such as "first", "second", etc., in the present application is for distinguishing purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. The features defining "first" and "second" may be explicit or implicit in relation to at least one of the technical features. In the description of the present invention, "a plurality" means at least two, i.e., two or more, unless expressly defined otherwise; the meaning of "at least one" is one or both.

In the present invention, unless explicitly specified or limited otherwise, the terms "mounting," "setting," "connecting," "fixing," "screwing" and the like are to be understood in a broad sense, and for example, the positional relationship between the components may be relatively fixed, or the components may be physically fixed and connected, or may be detachably connected, or may be integrated into a single structure; the connection can be mechanical connection or electrical signal connection; either directly or indirectly through intervening media or components; the two elements may be connected to each other or may be in an interaction relationship with each other, and unless otherwise explicitly limited by the specification, the specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations, except that the corresponding function or effect cannot be achieved in other understanding.

The present invention relates to a controller, a control circuit, etc., which all adopt the conventional control techniques or units of those skilled in the art, and the control circuit of the controller can be realized by those skilled in the art by adopting the existing techniques, such as simple programming. The power also adopts belong to this field of prior art, and the utility model discloses main utility model technical point lies in improving mechanical device, so the utility model discloses no longer explain in detail concrete circuit control relation and circuit connection.

As shown in fig. 1-4, the present invention provides an embodiment of a switching device for optical filter based on dynamic scene video capture.

The optical filter switching device based on dynamic scene video acquisition comprises an optical filter support and an optical filter driving mechanism for driving the optical filter support to do linear motion, wherein the optical filter support is provided with a strip-shaped conversion hole for converting the rotary motion of the optical filter driving mechanism into the linear motion, two axially symmetric limiting structures taking the strip-shaped conversion hole as an axis are arranged in the strip-shaped conversion hole at the motion part stopping position of the optical filter driving mechanism, and when each limiting structure is matched with the optical filter driving mechanism, the optical filter support applies force to a driving lever to enable the optical filter support to be in a linear motion locking state.

In particular, the moving part is provided with a stop structure at each stop movement position, typically the moving part has only two stop positions, i.e. a switching start position and an end position. The optical filter switching device comprises a body 10 provided with a containing cavity and a cover body 11 matched with the body 10, wherein the optical filter support 21 and the optical filter driving mechanism 3 are arranged in the containing cavity. The filter support 21 is provided with two light-transmitting sheets 20 with different light transmittance. The bar-shaped conversion hole 22 may also adopt other structures that convert a rotary motion into a linear motion, such as a bar-shaped groove. The limiting structure adopts a limiting groove 221.

When the limiting structure is matched with the optical filter driving mechanism 3, the optical filter support 21 is reversely moved and locked, that is, when the optical filter support 21 is in a locked state, the optical filter driving mechanism 3 pushes the optical filter driving mechanism 3, and when the swing arm 31 or the shift lever 311 is moved, the optical filter driving mechanism 3 enables the optical filter support 21 to be in a locked state; but can be moved normally when the filter holder 21 is driven by the filter driving mechanism 3.

The optical filter driving mechanism 3 comprises a moving part and a driving part for driving the moving part to rotate, wherein the moving part comprises a swing arm 31 provided with a free end and a rotating end, the free end of the swing arm 31 is provided with a shift lever 311 matched with the strip-shaped conversion hole 22, the rotating end of the swing arm 31 is provided with a rotating shaft, and the rotating shaft is provided with an annular permanent magnet 312; the driving part comprises a U-shaped iron core 30 formed by two iron arms 301 and a coil 32 sleeved on one iron arm 301 and connected with a control signal, each iron arm 301 is provided with an arc-shaped groove 302, after assembly, the two arc-shaped grooves 302 are wrapped on the outer side of an annular permanent magnet 312, and the coil 32 is connected with an external control circuit signal through a wiring harness 4 with an interface.

During operation, a control signal reaches the coil 32 through the wire harness 4, so as to drive the swing arm 31 to rotate around the coaxial rotating shaft of the annular permanent magnet 312, so that the free end of the swing arm 31 forms an arc-shaped movement track, the rotating movement of the swing arm 31 is converted into the linear movement of the filter support 21 under the matching of the deflector rod 311 and the strip-shaped conversion hole 22, and when the filter support 21 moves to the stop position, the swing arm 31 is stably positioned at the stop point under the matching of the annular permanent magnet 312 and the U-shaped iron core 30. By properly arranging that the shift lever 311 is just positioned in the limit groove 221, when external force, gravity of the filter support 21 and/or the resultant force of the external force and the gravity of the filter support 21 apply force to the shift lever 311 through the filter support 21, interference jamming is generated between the limit groove 221 which moves linearly and the shift lever 311 in a static state, the filter support 21 is in a reverse movement locking state, as shown in fig. 1, when the filter support 21 is subjected to the acting force except the shift lever 311, the filter support 21 is in the locking state when moving in the direction F, and when the filter support is locked, the shift lever is positioned in the limit groove of the limit structure.

When the optical filter needs to be switched, under the action of a control signal, the driving part enables the swing arm 31 to rotate in the direction opposite to the upward primary motion direction, under the action of the swing arm 31, the shifting rod 311 leaves the limiting groove 221, and under the action of the shifting rod 311 and the strip-shaped conversion hole 22, the rotary motion of the swing arm 31 is converted into the linear motion of the optical filter support 21, so that the switching of the optical filter is realized; when two arc-shaped limiting grooves 221 are provided, as shown in fig. 4, when the filter holder 21 is subjected to a force other than the shift lever 311, the filter holder 21 is in a locked state when the filter holder 21 moves in the direction E.

The locking position of the optical filter support can be locked, so that the optical filter support 21 is prevented from shaking between different light-transmitting sheets in an unstable use environment, and the image pickup effect is improved. Meanwhile, the filter switching device is only provided with the limiting groove 23 at the stop position of the filter support 21 in the strip-shaped switching hole 22, so that no part is required to be added, the configuration relation among original parts is not required to be changed, the cost can be saved, the size is not changed, and the filter switching device has better adaptability, simple and compact structure, stability and reliability.

In this embodiment, the position-limiting groove 221 is preferably smoothly connected to the strip converting hole 22 at a side away from the swing arm 31, so as to ensure that the driving filter holder 21 shakes when the driving lever 311 moves to the position-limiting groove 221. The limiting groove 221 is an arc-shaped limiting groove, and the arc-shaped limiting groove is a part of the movement track of the free end when the swing arm 31 rotates. The depth of the limiting groove 23 is not less than 1/2 of the diameter of the shift lever 311, and a stable locking state can be maintained.

According to the requirement, two limiting grooves 221 may be disposed in the bar-shaped conversion hole 22 to respectively lock two stop positions of the filter support, as shown in fig. 5, the two limiting grooves 221 may be axially symmetrically distributed in the bar-shaped conversion hole 22. The filter driving mechanism 3 and/or the driving means may also be implemented using known techniques.

In order to further reduce the resistance of the filter support during movement, i.e. the power consumption of the driving part, a guiding mechanism is arranged between the filter support and the cover body or the body. The guide mechanism comprises two parallel guide strip groups arranged on the filter support, and each guide strip group consists of a plurality of guide strip sections which are discontinuously distributed and are in a straight line.

According to the requirement, the free end of the driving lever 311 is provided with an anti-falling protrusion 313 matched with the slide hole, and the anti-falling protrusion 313 is longitudinally arranged, namely the longitudinal width is larger than the width of the strip-shaped conversion hole 22 and the limiting groove 221, so that the driving lever 311 is prevented from being separated from the strip-shaped conversion hole 22 and the limiting groove 221 when in use.

The utility model also provides a video acquisition device embodiment.

The video acquisition device comprises a light filter switching device, the light filter switching device adopts the structure of the embodiment, namely the light filter switching device comprises a light filter support and a light filter driving mechanism for driving the light filter support to do linear motion, the light filter support is provided with a strip-shaped conversion hole for converting the rotary motion of the light filter driving mechanism into the linear motion, the strip-shaped conversion hole is provided with two axially symmetric limiting structures taking the strip-shaped conversion hole as an axis at the motion part locking position of the light filter driving mechanism, and when each limiting structure is matched with the light filter driving mechanism, the light filter support applies force to a driving lever to enable the light filter support to be in a linear motion locking state.

In particular, the moving part is provided with a stop structure at each stop movement position, typically the moving part has only two stop positions, i.e. a switching start position and an end position. The optical filter switching device comprises a body 10 provided with a containing cavity and a cover body 11 matched with the body 10, wherein the optical filter support 21 and the optical filter driving mechanism 3 are arranged in the containing cavity. The filter support 21 is provided with two light-transmitting sheets 20 with different light transmittance. The bar-shaped conversion hole 22 may also adopt other structures that convert a rotary motion into a linear motion, such as a bar-shaped groove. The limiting structure adopts a limiting groove 221.

When the limiting structure is matched with the optical filter driving mechanism 3, the optical filter support 21 is reversely moved and locked, that is, when the optical filter support 21 is in a locked state, the optical filter driving mechanism 3 pushes the optical filter driving mechanism 3, and when the swing arm 31 or the shift lever 311 is moved, the optical filter driving mechanism 3 enables the optical filter support 21 to be in a locked state; but can be moved normally when the filter holder 21 is driven by the filter driving mechanism 3.

The optical filter driving mechanism 3 comprises a moving part and a driving part for driving the moving part to rotate, wherein the moving part comprises a swing arm 31 provided with a free end and a rotating end, the free end of the swing arm 31 is provided with a shift lever 311 matched with the strip-shaped conversion hole 22, the rotating end of the swing arm 31 is provided with a rotating shaft, and the rotating shaft is provided with an annular permanent magnet 312; the driving part comprises a U-shaped iron core 30 formed by two iron arms 301 and a coil 32 sleeved on one iron arm 301 and connected with a control signal, each iron arm 301 is provided with an arc-shaped groove 302, after assembly, the two arc-shaped grooves 302 are wrapped on the outer side of an annular permanent magnet 312, and the coil 32 is connected with an external control circuit signal through a wiring harness 4 with an interface.

During operation, a control signal reaches the coil 32 through the wire harness 4, so as to drive the swing arm 31 to rotate around the coaxial rotating shaft of the annular permanent magnet 312, so that the free end of the swing arm 31 forms an arc-shaped movement track, the rotating movement of the swing arm 31 is converted into the linear movement of the filter support 21 under the matching of the deflector rod 311 and the strip-shaped conversion hole 22, and when the filter support 21 moves to the stop position, the swing arm 31 is stably positioned at the stop point under the matching of the annular permanent magnet 312 and the U-shaped iron core 30. By properly arranging that the shift lever 311 is just positioned in the limit groove 221, when external force, gravity of the filter support 21 and/or the resultant force of the external force and the gravity of the filter support 21 apply force to the shift lever 311 through the filter support 21, interference jamming is generated between the limit groove 221 which moves linearly and the shift lever 311 in a static state, the filter support 21 is in a reverse movement locking state, as shown in fig. 1, when the filter support 21 is subjected to the acting force except the shift lever 311, the filter support 21 is in the locking state when moving in the direction F, and when the filter support is locked, the shift lever is positioned in the limit groove of the limit structure.

When the optical filter needs to be switched, under the action of a control signal, the driving part enables the swing arm 31 to rotate in the direction opposite to the upward primary motion direction, under the action of the swing arm 31, the shifting rod 311 leaves the limiting groove 221, and under the action of the shifting rod 311 and the strip-shaped conversion hole 22, the rotary motion of the swing arm 31 is converted into the linear motion of the optical filter support 21, so that the switching of the optical filter is realized; when two arc-shaped limiting grooves 221 are provided, as shown in fig. 4, when the filter holder 21 is subjected to a force other than the shift lever 311, the filter holder 21 is in a locked state when the filter holder 21 moves in the direction E.

The locking position of the optical filter support can be locked, so that the optical filter support 21 is prevented from shaking between different light-transmitting sheets in an unstable use environment, and the image pickup effect is improved. Meanwhile, the filter switching device is only provided with the limiting groove 23 at the stop position of the filter support 21 in the strip-shaped switching hole 22, so that no part is required to be added, the configuration relation among original parts is not required to be changed, the cost can be saved, the size is not changed, and the filter switching device has better adaptability, simple and compact structure, stability and reliability.

In this embodiment, the position-limiting groove 221 is preferably smoothly connected to the strip converting hole 22 at a side away from the swing arm 31, so as to ensure that the driving filter holder 21 shakes when the driving lever 311 moves to the position-limiting groove 221. The limiting groove 221 is an arc-shaped limiting groove, and the arc-shaped limiting groove is a part of the movement track of the free end when the swing arm 31 rotates. The depth of the limiting groove 23 is not less than 1/2 of the diameter of the shift lever 311, and a stable locking state can be maintained.

According to the requirement, two limiting grooves 221 may be disposed in the bar-shaped conversion hole 22 to respectively lock two stop positions of the filter support, as shown in fig. 5, the two limiting grooves 221 may be axially symmetrically distributed in the bar-shaped conversion hole 22. The filter driving mechanism 3 and/or the driving means may also be implemented using known techniques.

In order to further reduce the resistance of the filter support during movement, i.e. the power consumption of the driving part, a guiding mechanism is arranged between the filter support and the cover body or the body. The guide mechanism comprises two parallel guide strip groups arranged on the filter support, and each guide strip group consists of a plurality of guide strip sections which are discontinuously distributed and are in a straight line.

According to the requirement, the free end of the driving lever 311 is provided with an anti-falling protrusion 313 matched with the slide hole, and the anti-falling protrusion 313 is longitudinally arranged, namely the longitudinal width is larger than the width of the strip-shaped conversion hole 22 and the limiting groove 221, so that the driving lever 311 is prevented from being separated from the strip-shaped conversion hole 22 and the limiting groove 221 when in use.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit or scope of the present invention.

Claims (8)

1. The optical filter switching device based on dynamic scene video acquisition comprises an optical filter support and an optical filter driving mechanism for driving the optical filter support to do linear motion, wherein the optical filter support is provided with a strip-shaped conversion hole for converting the rotary motion of the optical filter driving mechanism into the linear motion.

2. The filter switching device according to claim 1, wherein the filter driving mechanism comprises a driving component for driving the moving component to rotate, the moving component comprises a swing arm having a free end and a rotating end, the shift lever is disposed at the free end and engaged with the bar-shaped switching hole, and the shift lever is located in a limit groove of the limit structure when the filter holder is locked.

3. The filter switching device for capturing dynamic scene video according to claim 2, wherein the driving member comprises a U-shaped iron core formed by two iron arms and a coil sleeved on one iron arm and connected with the control signal, each iron arm is provided with an arc-shaped slot distributed around the rotation axis of the ring-shaped permanent magnet.

4. The dynamic scene video capture-based filter switching arrangement of claim 2, wherein the limiting groove comprises an arc-shaped limiting groove, and the arc-shaped limiting groove is smoothly connected with the bar-shaped switching hole at a side away from the swing arm.

5. The filter switching device according to claim 4, wherein the arc-shaped limiting groove is a part of a motion track of the shift lever when the swing arm rotates.

6. The dynamic scene video capture-based filter switching arrangement of claim 2, wherein said shifter lever is configured with an anti-slip protrusion that mates with a limit groove and a bar switch hole.

7. The filter switching device according to claim 1, wherein a guide mechanism is disposed between the filter holder and the cover or the body, the guide mechanism comprises two parallel guide bar sets disposed on the filter holder, and each guide bar set comprises a plurality of guide bar segments intermittently distributed in a straight line.

8. A video capture device comprising a filter switching device, wherein the filter switching device is a filter switching device as claimed in any one of claims 1 to 7.

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