CN112558385B - Light filter switching device and video acquisition device - Google Patents
Light filter switching device and video acquisition device Download PDFInfo
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- CN112558385B CN112558385B CN202011458399.XA CN202011458399A CN112558385B CN 112558385 B CN112558385 B CN 112558385B CN 202011458399 A CN202011458399 A CN 202011458399A CN 112558385 B CN112558385 B CN 112558385B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
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Abstract
The invention discloses a light filter switching device and a video acquisition device, wherein the light filter switching device comprises a light filter driving mechanism for driving a light filter support to move linearly, 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 light filter driving mechanism comprises a moving part and a driving part, the moving part comprises a swing arm provided with a free end and a rotating end, the free end is provided with a deflector rod matched with the strip-shaped conversion hole, the strip-shaped conversion hole is provided with a limiting groove, and when the deflector rod is positioned in the limiting groove and the light filter support applies force to the deflector rod, the deflector rod enables the light filter support to be in a linear motion locking state. When the shifting rod is matched with the limiting groove, the optical filter support is locked in the force application direction of the shifting rod, and the stability of the optical filter switching device is improved. Meanwhile, the configuration relation of parts and parts does not need to be increased, the cost is saved, and the structure is simple and compact.
Description
Technical Field
The invention relates to the technical field of video shooting, in particular to an optical filter switching device and a video acquisition device.
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.
Disclosure of Invention
The invention mainly solves the technical problem of providing the optical filter switching device and the video acquisition device, wherein the optical filter switching device can avoid the unstable position of the optical filter caused by fluctuation or vibration, improve the image pickup effect, reduce the number of parts and cost at the same time, and has simple and compact structure.
In order to solve the problems, the invention provides an optical filter switching device which comprises an optical filter support and an optical filter driving mechanism for driving the optical filter support to move linearly, 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, the optical filter driving mechanism comprises a motion part and a driving part for driving the motion part to rotate, the motion part comprises a swing arm provided with a free end and a rotating end, the free end is provided with a deflector rod matched with the strip-shaped conversion hole, the strip-shaped conversion hole is provided with a limiting groove, and when the deflector rod is positioned in the limiting groove and the optical filter support applies force to the deflector rod, the deflector rod enables the optical filter support to be in a linear motion 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 belt-shaped permanent magnet.
Further, when the strip-shaped conversion hole is provided with two limiting grooves, the two limiting grooves are distributed in an axisymmetric manner by taking the strip-shaped conversion hole as an axis.
Further, the depth of the limiting groove is not less than 1/2 of the diameter of the deflector rod.
Furthermore, the driving lever is provided with an anti-falling protrusion matched with the limiting groove and the strip-shaped conversion hole.
Furthermore, a guide mechanism is arranged between the optical filter support and the cover body or the body, the guide mechanism comprises two parallel guide strip groups arranged on the optical filter support, and each guide strip group consists of a plurality of guide strip sections which are discontinuously distributed on a straight line.
Furthermore, the driving lever is provided with an anti-falling structure matched with the limiting groove and the strip-shaped conversion hole.
Furthermore, the anti-falling structure comprises a deflector rod with a trapezoidal section, and the deflector rod is matched with the limiting groove and the horn-shaped end face of the strip-shaped conversion hole.
The invention provides a video acquisition device which comprises a filter switching device, wherein the filter switching device comprises a filter driving mechanism for driving a filter support to move, the filter support is provided with a strip-shaped conversion hole for converting the rotary motion of the filter driving mechanism into linear motion, the filter driving mechanism comprises a motion part and a driving part for driving the motion part to rotate, the motion part comprises a swing arm provided with a free end and a rotation end, the free end is provided with a deflector rod matched with the strip-shaped conversion hole, the strip-shaped conversion hole is provided with a limiting groove, and when the deflector rod is matched with the limiting groove, the deflector rod enables the filter support to be in a locking state when the filter support applies force to the deflector rod.
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 belt-shaped permanent magnet.
Furthermore, the limiting groove is 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 limiting groove is a part of the motion track of the shifting lever when the swing arm rotates.
Further, when the strip-shaped conversion hole is provided with two limiting grooves, the two limiting grooves are distributed in an axisymmetric manner by taking the strip-shaped conversion hole as an axis.
Furthermore, the driving lever is provided with an anti-falling protrusion matched with the limiting groove and the strip-shaped conversion hole.
Furthermore, a guide mechanism is arranged between the optical filter support and the cover body or the body, the guide mechanism comprises two parallel guide strip groups arranged on the optical filter support, and each guide strip group consists of a plurality of guide strip sections which are discontinuously distributed on a straight line.
Furthermore, the driving lever is provided with an anti-falling structure matched with the limiting groove and the strip-shaped conversion hole.
Furthermore, the anti-falling structure comprises a deflector rod with a trapezoidal section, and the deflector rod is matched with the limiting groove and the horn-shaped end face of the strip-shaped conversion hole.
The invention discloses an optical filter switching device and a video acquisition device, wherein the optical filter switching device comprises an optical filter support and an optical filter driving mechanism for driving the optical filter support to move linearly, 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, the optical filter driving mechanism comprises a motion part and a driving part for driving the motion part to rotate, the motion part comprises a swing arm provided with a free end and a rotating end, the free end is provided with a deflector rod matched with the strip-shaped conversion hole, the strip-shaped conversion hole is provided with a limiting groove, and when the deflector rod is positioned in the limiting groove and the optical filter support applies force to the deflector rod, the deflector rod enables the optical filter support to be in a linear motion locking state. When the swing arm finishes switching movement to a locking position, the shifting lever on the swing arm is just positioned in the limiting groove, when the optical filter support is disturbed by external force and/or self gravity, when the optical filter support pushes the shifting lever to move, the linear movement of the optical filter support interferes with the arc-shaped movement of the shifting lever, so that the optical filter support is locked, namely, the optical filter support cannot move, and the optical filter support is ensured to be in a locking position and keep a stable state. When the switching is needed, the shifting rod is separated from the limiting groove through the swing arm, and the rotating motion of the swing arm is converted into the linear motion of the optical filter support through the matching of the shifting rod and the strip-shaped conversion hole, so that the switching of the optical filter support is realized. When the shifting rod is matched with the limiting groove, the optical filter support is locked in the force application direction of the shifting rod, so that the stability of the optical filter switching device is improved. Meanwhile, the configuration relation of parts and parts does not need to be increased, so that the cost is saved, the size of the device is not increased, the structure is simple and compact, and the device is stable and reliable and has better adaptability.
Drawings
In order to illustrate the embodiments of the invention or the technical solutions in the prior art more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the description only show some embodiments of the invention and therefore should not be considered as limiting the scope, and for a person skilled in the art, other related drawings can also 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.
Fig. 6 is a schematic structural view of an embodiment of the anti-dropping structure.
The objectives, features, and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The following claims of the present invention are further detailed in conjunction with the detailed description of the embodiments and the accompanying drawings, and it is to be understood that the described embodiments are only a subset of the embodiments of the present invention, and not all embodiments. The embodiments used in the present invention, all other embodiments obtained by a person of ordinary skill in the art without any inventive work, are also within the scope of the present invention.
It should be understood that in the description of the embodiments of the present invention, all directional terms, such as "upper", "lower", "left", "right", "front", "back", etc., are used for indicating the orientation and positional relationship of the invention, or the orientation and positional relationship of the invention in use, and are used for simplifying the description of the invention, but do not indicate or imply that the device, element or component in question must have a specific orientation and a specific orientation configuration, and should not be construed as limiting the 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 terms such as "first", "second", etc., in the present application is for distinguishing between similar elements and not intended to imply or imply relative importance or 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 otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood in a broad sense, and for example, the positional relationship between the components may be fixed relatively, or the components may be physically fixed, 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 can be communicated with each other or can be mutually interacted, and unless the specification explicitly defines otherwise, the corresponding function or effect cannot be realized in other understanding manners, and the specific meaning of the terms in the invention can be understood by a person skilled in the art according to specific conditions.
The present invention relates to a controller, a control circuit, etc., which all use the conventional control techniques or units of those skilled in the art, and the control circuit of the controller can be implemented by those skilled in the art by using the existing techniques, such as simple programming. The power supply also adopts the prior art, and the main technical point of the invention lies in the improvement of mechanical devices, so the invention does not need to describe the specific circuit control relation and circuit connection in detail.
As shown in fig. 1-4, the present invention provides an embodiment of a filter switching device.
The optical filter switching device comprises an optical filter support 21 and an optical filter driving mechanism 3 for driving the optical filter support 21 to do linear motion, wherein the optical filter support 21 is provided with a bar-shaped conversion hole 22 for converting the rotary motion of the optical filter driving mechanism 3 into the linear motion, the optical filter driving mechanism 3 comprises a motion part and a driving part for driving the motion part to rotate, the motion part comprises a swing arm 32 provided with a free end and a rotation end, the free end is provided with a shifting rod 311 matched with the bar-shaped conversion hole, the bar-shaped conversion hole 22 is provided with a limiting groove 23, and when the shifting rod 311 is positioned in the limiting groove 23 and the optical filter support 21 applies force to the shifting rod 311, the shifting rod 311 enables the optical filter support 21 to be in a linear motion locking state.
Specifically, the filter switching device includes a body 10 having a storage cavity and a cover 11 engaged with the body 10, and the filter holder 21 and the filter driving mechanism 3 are disposed in the storage 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.
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.
The limiting groove 221 includes an included angle with the bar-shaped conversion hole 22, the included angle is an acute angle, the limiting groove 221 includes an arc-shaped limiting groove or a bar-shaped limiting groove, and when the arc-shaped limiting groove is adopted, the arc-shaped limiting groove is a part of the movement track of the driving lever 311 when rotating.
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 motion track, the rotating motion of the swing arm 31 is converted into the linear motion 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 linearly moves to the stop position, the swing arm 31 is stably located at the stop position under the matching of the annular permanent magnet 312 and the U-shaped iron core 30. By proper arrangement, the driving lever 311 is just positioned in the limiting groove 221. When external force, the 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 from the filter support 21, the arc-shaped motion of the shift lever 311 and the linear motion of the filter support 21 are in an interference state, at this time, the shift lever 311 locks the filter support 21, that is, when the force is applied to the shift lever 311 through the filter support 21, interference jamming is generated between the limiting groove 221 which moves linearly and the shift lever 311 which is in a static state. As shown in fig. 1, when the filter holder 21 receives a force other than the shift lever 311, the filter holder 21 is in a locked state when moving in the F direction.
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 simultaneously, under the matching 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 optical filter support 21 is driven to move linearly, and the switching of the optical filter is realized. When two stopper grooves 221 are provided, as shown in fig. 4, when the filter holder 21 receives 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 side of the limiting groove 221 away from the swing arm 31 is preferably smoothly connected to the stripe converting hole 22, so that the driving rod 311 can drive the filter holder 21 to shake when moving to the limiting groove 221.
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. The limiting groove 23 is a part of the motion track of the shift lever 311 when the swing arm 31 rotates.
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.
As shown in fig. 6, the shift lever 311 is provided with an anti-falling structure cooperating with the limiting groove 23 and the bar-shaped conversion hole 22, the anti-falling structure includes a shift lever 311 with a trapezoidal section, the trapezoidal shift lever 311 cooperates with a horn-shaped inclined plane formed by the inclined planes of the limiting groove 23 and the bar-shaped conversion hole 22, and the inclined planes of the two cooperate with each other, so that the optical filter support is always close to one side of the swing arm 31 in the movement process, thereby preventing the optical filter support from falling off when in use.
The invention also provides an embodiment of the camera device.
The image pickup device comprises an optical filter switching device, the optical filter switching device adopts the structure of the embodiment, namely the optical filter switching device comprises an optical filter support 21 and an optical filter driving mechanism 3 for driving the optical filter support 21 to do linear motion, the optical filter support 21 is provided with a strip-shaped conversion hole 22 for converting the rotary motion of the optical filter driving mechanism 3 into the linear motion, the optical filter driving mechanism 3 comprises a motion part and a driving part for driving the motion part to rotate, the motion part comprises a swing arm 32 provided with a free end and a rotating end, the free end is provided with a shifting rod 311 matched with the strip-shaped conversion hole, the strip-shaped conversion hole 22 is provided with a limiting groove 23, and when the shifting rod 311 is positioned in the limiting groove 23 and the optical filter support 21 applies force to the shifting rod 311, the shifting rod 311 enables the optical filter support 21 to be in a linear motion locking state.
Specifically, the filter switching device includes a body 10 having a storage cavity and a cover 11 engaged with the body 10, and the filter holder 21 and the filter driving mechanism 3 are disposed in the storage 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.
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.
The limiting groove 221 includes an included angle with the bar-shaped conversion hole 22, the included angle is an acute angle, the limiting groove 221 includes an arc-shaped limiting groove or a bar-shaped limiting groove, and when the arc-shaped limiting groove is adopted, the arc-shaped limiting groove is a part of the movement track of the driving lever 311 when rotating.
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 motion track, the rotating motion of the swing arm 31 is converted into the linear motion 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 linearly moves to the stop position, the swing arm 31 is stably located at the stop position under the matching of the annular permanent magnet 312 and the U-shaped iron core 30. By proper arrangement, the driving lever 311 is just positioned in the limiting groove 221. When external force, the 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 from the filter support 21, the arc-shaped motion of the shift lever 311 and the linear motion of the filter support 21 are in an interference state, at this time, the shift lever 311 locks the filter support 21, that is, when the force is applied to the shift lever 311 through the filter support 21, interference jamming is generated between the limiting groove 221 which moves linearly and the shift lever 311 which is in a static state. As shown in fig. 1, when the filter holder 21 receives a force other than the shift lever 311, the filter holder 21 is in a locked state when moving in the F direction.
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 simultaneously, under the matching 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 optical filter support 21 is driven to move linearly, and the switching of the optical filter is realized. When two stopper grooves 221 are provided, as shown in fig. 4, when the filter holder 21 receives 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 side of the limiting groove 221 away from the swing arm 31 is preferably smoothly connected to the stripe converting hole 22, so that the driving rod 311 can drive the filter holder 21 to shake when moving to the limiting groove 221.
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. The limiting groove 23 is a part of the motion track of the shift lever 311 when the swing arm 31 rotates.
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.
As shown in fig. 6, the shift lever 311 is provided with an anti-falling structure cooperating with the limiting groove 23 and the bar-shaped conversion hole 22, the anti-falling structure includes a shift lever 311 with a trapezoidal section, the trapezoidal shift lever 311 cooperates with a horn-shaped inclined plane formed by the inclined planes of the limiting groove 23 and the bar-shaped conversion hole 22, and the inclined planes of the two cooperate with each other, so that the optical filter support is always close to one side of the swing arm 31 in the movement process, thereby preventing the optical filter support from falling off when in use.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill 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 (10)
1. The optical filter switching device 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, the optical filter driving mechanism comprises a motion part and a driving part for driving the motion part to rotate, the motion part comprises a swing arm provided with a free end and a rotation end, and the free end is provided with a shifting lever matched with the strip-shaped conversion hole.
2. The filter switching apparatus according to claim 1, wherein said driving portion comprises a U-shaped iron core formed by two iron arms and a coil fitted over one of the iron arms and connected to the control signal, each of the iron arms being provided with an arc-shaped slot distributed around a rotation axis of the ring-shaped permanent magnet.
3. The optical filter switching apparatus of claim 1, wherein the depth of the limiting groove is not less than 1/2 of the diameter of the deflector rod.
4. The apparatus of claim 1, wherein the shift lever has an anti-separation structure cooperating with the position-limiting groove and the strip-shaped switching hole.
5. The filter switching apparatus of claim 4, wherein the anti-separation structure comprises a bar having a trapezoidal cross section, and the bar is engaged with the limiting groove and the trumpet-shaped end surface of the bar-shaped conversion hole.
6. The utility model provides a video acquisition device, includes filter auto-change over device, its characterized in that, filter auto-change over device includes light filter support and the light filter actuating mechanism of drive light filter support rectilinear motion, the light filter support is equipped with the bar conversion hole that turns into linear motion with light filter actuating mechanism rotary motion, light filter actuating mechanism includes motion portion and drive motion portion pivoted drive division, the motion portion is including the swing arm that is equipped with free end and rotation end, the free end is equipped with the driving lever with bar conversion hole complex, bar conversion hole is equipped with the spacing groove, and when the driving lever was located the spacing groove, and when the light filter support was to the driving lever application of force, the driving lever made the light filter support be in rectilinear motion locking state.
7. A video recording device according to claim 6, wherein said driving portion comprises a U-shaped iron core formed by two iron arms and a coil fitted over one of the iron arms and connected to the control signal, each iron arm being provided with an arc-shaped slot distributed around the axis of rotation of the permanent magnet.
8. The video capture device of claim 6, wherein the depth of the retaining groove is no less than 1/2 of the diameter of the toggle lever.
9. The video capture device of claim 6, wherein the toggle lever is configured with an anti-disengagement feature that engages the retaining groove and the strap-over hole.
10. The video capture device of claim 9, wherein the anti-separation structure comprises a bar having a trapezoidal cross-section that engages the retaining groove and the flared end of the strap transition hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412139 | 2020-12-03 | ||
| CN2020114121399 | 2020-12-03 |
Publications (2)
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| JP2016122074A (en) * | 2014-12-24 | 2016-07-07 | 日本電産コパル株式会社 | Filter change-over device |
| CN204374580U (en) * | 2015-01-05 | 2015-06-03 | 吴国富 | Switching device of optical fiber, cam device and camera head |
| CN106909018A (en) * | 2017-01-12 | 2017-06-30 | 浙江水晶光电科技股份有限公司 | The Penetrating Fog switching module that a kind of suitable greasy weather uses |
| CN207232622U (en) * | 2017-10-13 | 2018-04-13 | 深圳市钒德电子有限公司 | Double optical filter switching position Autonomous tests and filming apparatus |
| CN208093900U (en) * | 2018-05-12 | 2018-11-13 | 瑞安市欧力特电器有限公司 | A kind of car socket |
| TWM588262U (en) * | 2019-09-11 | 2019-12-21 | 釩德電子股份有限公司 | Automatically manufactured infrared filter switcher |
| CN210152479U (en) * | 2019-01-11 | 2020-03-17 | 李瀚� | Door closer with self-limiting and self-unlocking functions |
| CN210401979U (en) * | 2019-09-17 | 2020-04-24 | 钒德电子股份有限公司 | Automatic manufacture infrared filter switcher |
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