CN113848674B

CN113848674B - Built-in double-optical-filter switching mechanism for camera

Info

Publication number: CN113848674B
Application number: CN202111142258.1A
Authority: CN
Inventors: 孙成智
Original assignee: Shenzhen Jvt Technology Co ltd
Current assignee: Shenzhen Jvt Technology Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-12-30
Anticipated expiration: 2041-09-28
Also published as: CN113848674A

Abstract

The invention relates to the technical field of camera equipment and discloses a built-in double-optical-filter switching mechanism for a camera. Through the screw thread lantern ring, the connecting piece, the ejector pin, the setting of button, in switching the in-process to the light filter, the connecting piece can drive the framework and remove along with the screw thread lantern ring, when certain light filter remove with make a video recording the through-hole coaxial position, the button of the corresponding end of screw thread lantern ring will support tightly with the ejector pin contact of homonymy, the electro-magnet outage, make clamp plate and screw thread lantern ring separation, close servo motor simultaneously, can accomplish the switching to the light filter, not only can avoid closing untimely at servo motor, prevent that light filter and shells inner wall from taking place the striking, the extrusion, and can guarantee that the light filter is coaxial with the through-hole of making a video recording, ensure the effect of making a video recording, need not carry out accurate braking to servo motor simultaneously, the manufacturing degree of difficulty has been reduced.

Description

Built-in double-optical-filter switching mechanism for camera

Technical Field

The invention relates to the technical field of camera equipment, in particular to a built-in double-optical-filter switching mechanism for a camera.

Background

The double-optical-filter switching mechanism is a mechanical device for filtering infrared rays, is mainly used in the field of monitoring cameras, enables the cameras to have a better adaptation to illumination reflection of scenery in different shooting scenes, avoids image color cast, enables images to be more real, and has the following principle: firstly, in order to make the camera have the night vision function, infrared light is required to be emitted by an infrared lamp LED at night, the infrared light enters a CCD (image generation camera) to be imaged after being reflected to finish shooting, in order to cut off the infrared light in the daytime to make the image clear and real, and blue glass for cutting off the infrared light is required to be pasted in front of a CCD lens, so that a mechanical device is arranged to finish the process of placing an optical filter for cutting off the infrared light in the daytime in front of the CCD lens, and the optical filter is automatically switched into a fully transparent optical filter at night to meet the requirements of the infrared night vision camera; the defects that the image is interfered by infrared rays in the daytime, and the illumination intensity of the night vision image is not enough or is interfered by white light are thoroughly overcome.

However, the existing motor-type device for automatically switching the double filters is unsatisfactory in the actual use process, and the double filters are switched by generally adopting a motor to positively and negatively rotate a lead screw to drive a threaded sleeve ring to reciprocate on the lead screw, but in the process of switching the double filters, once the filter is moved to a preset position in the switching process, the motor needs to be immediately turned off, the motor needs to be accurately enough and difficult to be switched off, the filter can be slightly shifted due to carelessness, and the shooting effect is influenced; moreover, after the motor is turned off, the rotor has inertia, so that the rotating shaft can be generally driven to rotate in a speed reduction manner, the optical filter can be deviated, and even the optical filter is impacted or extruded with the inner wall of the shell, so that the optical filter is damaged, the optical filter cannot normally work, and the camera quality can be seriously reduced.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the built-in double-optical-filter switching mechanism for the camera, which has the advantages of quick switching, accurate optical filter switching and good camera shooting effect and solves the problems in the background technology.

The invention provides the following technical scheme: a built-in double-filter switching mechanism for a camera comprises a shell, wherein a clamping groove is formed in the shell, a camera through hole penetrating through the shell is formed in the middle of the clamping groove, a servo motor is fixedly mounted at one end of the shell, a first gear is fixedly connected to the output end of the servo motor, a second gear is meshed with one side of the first gear, a lead screw movably sleeved with the shell is fixedly connected to the middle of the second gear, a threaded lantern ring is connected to the middle of the lead screw in a threaded mode, a connecting piece is clamped to one end of the threaded lantern ring, a frame body is fixedly connected to the other end of the connecting piece, an infrared filter and a transparent filter are fixedly mounted on the two front sides of the frame body respectively, an electromagnet is fixedly mounted inside the threaded lantern ring close to one side of the connecting piece, and buttons are arranged on the upper side and the lower side of the threaded lantern ring.

Preferably, the connecting piece includes the main part, the upper portion and the equal fixedly connected with supporting spring in bottom of main part, the other end fixedly connected with clamp plate of supporting spring.

Preferably, one end of the screw rod, which is close to the second gear, is fixedly connected with a wire wheel, the middle part of the wire wheel is movably sleeved with a connecting rope, the other end of the connecting rope is fixedly connected with a sliding plate, one end of the sliding plate is fixedly connected with a first corrugated pipe, the other end of the sliding plate is fixedly connected with a casing, the outer side of the middle part of the other end of the sliding plate is fixedly connected with a second corrugated pipe, the inner part of the second corrugated pipe is provided with a reset spring, the middle part of the sliding plate is fixedly connected with the reset spring, the two sides of the sliding plate are respectively provided with an exhaust hole, the exhaust holes are communicated with the first corrugated pipe and the second corrugated pipe, the first corrugated pipe is provided with a first pipeline at one end, which is far away from the sliding plate, the second corrugated pipe is provided with a second pipeline at one end, the other ends of the first pipeline and the second pipeline are respectively provided with two groups of branch pipes, the branch pipes are arranged in the inner wall of the casing, and the branch pipes are provided with a plurality of dust absorption holes which are arranged in an equal distance.

Preferably, the equal fixed mounting in both ends of draw-in groove has the body, the body is towards three rubber tube of group of one side fixedly connected with of framework, the other end fixedly connected with buffer board of rubber tube, the one end fixedly connected with of body and casing fixed connection's sleeve, the piston has been cup jointed in telescopic inside activity, the piston is towards the equal fixedly connected with in both sides at screw thread lantern ring one end middle part and the ejector pin of button looks adaptation, rubber tube and sleeve inside packing have inert gas helium.

Preferably, the two groups of pressure plates are made of armatures, and a friction plate between the two groups of pressure plates is arranged at one end, close to the frame body, of the threaded lantern ring.

Preferably, the length of the side surface of the frame body is two thirds of the length of the side surface of the clamping groove.

Preferably, the inside of two sets of exhaust holes is provided with an outward opening check valve.

Preferably, the first pipeline and the second pipeline are internally provided with check valves with openings facing the insides of the corrugated pipes, one end of the first pipeline, which is far away from the first corrugated pipe, is arranged at one third of one end, which is far away from the servo motor, of the side surface of the clamping groove, and the other end of the second pipeline is arranged at one third of one end, which is close to the servo motor, of the side surface of the clamping groove.

The invention has the following beneficial effects:

1. through the screw thread lantern ring, the connecting piece, the ejector pin, the setting of button, in switching the in-process to the light filter, the clamp plate can press from both sides the screw thread lantern ring under the electro-magnet magnetic force effect and press from both sides tightly fixedly, make the connecting piece can drive the framework and move along with the screw thread lantern ring, when certain light filter move to with make a video recording through-hole coaxial position, the button of the corresponding end of screw thread lantern ring will support tightly with the ejector pin contact of homonymy, make the electro-magnet outage, can make clamp plate and screw thread lantern ring separation, close servo motor simultaneously, can accomplish the switching to the light filter, not only can avoid closing untimely at servo motor, prevent that light filter and shells inner wall from taking place the striking, the extrusion, and can guarantee that the light filter is coaxial with the through-hole of making a video recording, ensure the effect of making a video recording, simultaneously need not carry out accurate braking to servo motor, the manufacturing degree of difficulty is reduced.

2. Through the ejector pin, the buffer board, the setting of rubber tube, after clamp plate and screw thread lantern ring separation, because the framework has certain inertia, can lead to the framework to drive two sets of light filters and continue to move, and then also cause the framework easily, the light filter skew leads to the fact the extrusion damage even, at this moment the buffer board, the rubber tube will play the cushioning effect to the framework, the rubber tube is compressed under the framework extrusion, make the light filter will take place certain skew, influence the effect of making a video recording, simultaneously because servo motor still can carry out the rotation at a slow down under inertia after shutting down, make the screw thread lantern ring still can move the certain distance with the button contact after, thereby make the screw thread lantern ring promote the ejector pin, the piston removes, extrude the rubber tube inside with the inside inert gas of sleeve, make the rubber tube extension, and then offset the compression volume that produces when being moved by framework inertia, make the light filter can keep aligning, further guarantee the effect of making a video recording.

3. Through the arrangement of the connecting rope, the sliding plate, the first pipeline and the second pipeline, in the process of switching the infrared filter, the wire wheel can also wind the connecting rope to enable the sliding plate to move towards the right side, so that the second corrugated pipe can be stretched to generate negative pressure, a check valve in the second pipeline is opened, through the second pipeline, the branch pipe and the dust suction hole, dust suction treatment can be carried out on two sides of the whole infrared filter moving in the switching process, dust stained on two sides of the infrared filter can be removed, the camera quality is ensured, meanwhile, the first corrugated pipe can be compressed, and the exhaust hole and the check valve in the first corrugated pipe are opened to exhaust and discharge dust; in a similar way, in the process of switching the transparent filter, dust on two sides of the transparent filter can be sucked, and the shooting quality of the camera is ensured.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view ofbase:Sub>A structure A-A of the present invention;

fig. 3 is an enlarged view of the structure B of the present invention.

In the figure: 1. a housing; 101. a card slot; 102. a camera through hole; 2. a servo motor; 3. a first gear; 4. a second gear; 5. a screw rod; 6. a threaded collar; 7. a connecting member; 71. a main body; 72. a support spring; 73. pressing a plate; 8. a frame body; 9. an infrared filter; 10. a transparent filter; 11. an electromagnet; 12. pressing a key; 13. a wire wheel; 14. connecting ropes; 15. a sliding plate; 16. a first bellows; 17. a second bellows; 18. a return spring; 19. an exhaust hole; 20. a first conduit; 21. a second conduit; 22. a branch pipe; 23. a dust collection hole; 24. a pipe body; 25. a rubber tube; 26. a buffer plate; 27. a sleeve; 28. a piston; 29. and a push rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a built-in double-optical filter switching mechanism for a camera comprises a housing 1, a clamping groove 101 is formed in the housing 1, a camera through hole 102 penetrating the housing 1 is formed in the middle of the clamping groove 101, a servo motor 2 is fixedly installed at one end of the housing 1, a first gear 3 is fixedly connected to an output end of the servo motor 2, a second gear 4 is engaged with one side of the first gear 3, a lead screw 5 movably sleeved with the housing 1 is fixedly connected to the middle of the second gear 4, a threaded collar 6 is screwed to the middle of the lead screw 5, a connecting member 7 is clamped to one end of the threaded collar 6, the connecting member 7 comprises a main body 71, a supporting spring 72 is fixedly connected to the upper portion and the bottom of the main body 71, a pressing plate 73 is fixedly connected to the other end of the supporting spring 72, a frame body 8 is fixedly connected to the other end of the supporting spring, an infrared filter 9 and an optical filter 10 are fixedly installed on two sides of the front surface of the frame 8, an inner portion of the threaded collar 6 close to one side of the connecting member 7 is fixedly installed with an electromagnet 11, keys 12 are arranged on two sides of the upper and lower portion of the threaded collar 6, a corrugated tube 5 close to one end of the corrugated tube, a wire 13 is fixedly connected to one end of the corrugated tube, a corrugated tube 15 fixed to the other end of the corrugated tube, a corrugated tube is connected to the corrugated tube, a corrugated tube 15 fixed to the corrugated tube, a corrugated tube 15 connected to the corrugated tube 17, a corrugated tube fixed to the corrugated tube, a corrugated tube 15 fixed to the corrugated tube 15, a sliding plate fixed to the corrugated tube 17, a corrugated tube 15 connected to the corrugated tube 17, a sliding plate fixed to the corrugated tube 17 connected to the corrugated tube 17, the first bellows 16 is kept away from the one end of sliding plate 15 and has been seted up first pipeline 20, and the second bellows 17 is kept away from the one end of sliding plate 15 and has been seted up second pipeline 21, and the other end of first pipeline 20, second pipeline 21 all is provided with two sets of branch pipes 22 of seting up in casing 1 inner wall, and a plurality of sets of equidistance dust absorption hole 23 of arranging is seted up to one side of branch pipe 22 towards framework 8.

Wherein, the tube 24 is fixedly mounted at both ends of the slot 101, three groups of rubber tubes 25 are fixedly connected to one side of the tube 24 facing the frame 8, the other end of each rubber tube 25 is fixedly connected with a buffer board 26, one end of the tube 24 is fixedly connected with a sleeve 27 fixedly connected with the housing 1, a piston 28 is movably sleeved in the sleeve 27, the piston 28 is fixedly connected with a push rod 29 matched with the key 12 towards both sides of the middle part of one end of the threaded collar 6, the rubber tube 25 and the sleeve 27 are filled with inert gas helium, because the servo motor 2 can also perform deceleration rotation under inertia after being stopped, the threaded collar 6 can move for a certain distance after contacting with the key 12, so that the threaded collar 6 pushes the push rod 29 and the piston 28 moves, the inert gas in the sleeve 27 is extruded into the rubber tube 25, the rubber tube 25 extends, the extension amount of the rubber tube 25 depends on the moving distance of the piston 28, therefore, the braking time of the servo motor 2 (the working time of the servo motor 2 is equal and fixed during each switching) and the moving amount of the servo motor 2 under the inertia effect of driving the movement of the threaded collar 6 can be controlled, and the inertial collar 28 can be further aligned with the optical filter, and the effect of the optical filter can be further kept, and the optical filter can be further kept.

The two sets of pressing plates 73 are made of armatures, a friction plate between the two sets of pressing plates 73 is arranged at one end, close to the frame body 8, of the threaded lantern ring 6, the connecting piece 7 is arranged, the frame body 8 can move, the press keys 12 are in a loose state at the moment, the electromagnet 11 is powered on, the pressing plates 73 can overcome the elastic force of the supporting springs 72 under the magnetic force action of the electromagnet 11 to clamp and fix the threaded lantern ring 6, when the frame body 8 moves to contact with the buffer plate 26, the press keys 12 at one end of the threaded lantern ring 6 are in contact and abut against the ejector rods 29 at the same side, the electromagnet 11 is powered off, the two sets of pressing plates 73 retract under the action of the supporting springs 72 at the corresponding side, the pressing plates 73 can be separated from the threaded lantern ring 6, meanwhile, the servo motor 2 is turned off, switching of the infrared optical filter 9 can be completed, the connecting piece 7 is separated from the threaded lantern ring 6 when the optical filter reaches a preset position in the switching process, the switching of the optical filter can be avoided, the situation that the servo motor 2 is not turned off timely, impact and extrusion with the inner wall of the shell 1 can be prevented, the optical filter can be guaranteed, the through hole 102 of the imaging effect can be guaranteed, and the optical filter 2 does not need to be braked accurately at the same time, and the difficulty in manufacturing of the servo motor 2 is reduced.

Wherein, the inside of two sets of exhaust holes 19 all is provided with the outside check valve of opening, can discharge its inside air, the dust of inhaling when each bellows is compressed to when the light filter switches over next time, can absorb its surface dust once more, ensure that each light filter is clean all the time, ensure the effect of making a video recording.

The inner parts of the first pipeline 20 and the second pipeline 21 are respectively provided with a check valve with an opening facing the inner part of each corrugated pipe, one end of the first pipeline 20 far away from the first corrugated pipe 16 is arranged at one third of one end of the clamping groove 101 far away from the servo motor 2, the other end of the second pipeline 21 is arranged at one third of one end of the clamping groove 101 close to the servo motor 2, the transparent optical filter 10 is positioned at the middle position in the dark night, the infrared optical filter 9 needs to be switched to the middle part of the clamping groove 101 in the daytime, and in the process of starting the servo motor 2 to drive the infrared optical filter 9 to move, the whole infrared optical filter 9 passes through the side of the clamping groove 101 at one third of one end of the servo motor 2, so that the second corrugated pipe 17 which is continuously stretched is matched with the second pipeline 21, the branch pipe 22 and the dust suction hole 23, dust suction processing is carried out on two sides of the whole infrared optical filter 9 moving in the switching process, dust on the two sides of the infrared optical filter 9 can be removed, and the shooting quality is ensured; similarly, when the transparent filter 10 is switched, the first pipeline 20 will also perform a dust removal process.

The working principle is that when the optical filter is switched to the daytime at night, the servo motor 2 is started, the screw rod 5 rotates to drive the threaded sleeve ring 6 and the frame body 8 to move towards one end away from the servo motor 2, the press keys 12 are in a loose state in the moving process of the frame body 8, the electromagnets 11 are powered on, the press plates 73 can overcome the elastic force of the supporting springs 72 under the magnetic force action of the electromagnets to clamp and fix the threaded sleeve ring 6, when the frame body 8 moves to contact with the buffer plate 26, the press keys 12 at one end of the threaded sleeve ring 6 are in contact and abut against the ejector rods 29 at the same side, the electromagnets 11 are powered off, two groups of press plates 73 are retracted under the action of the supporting springs 72 at the corresponding side, the press plates 73 can be separated from the threaded sleeve ring 6, the servo motor 2 is turned off at the same time, the switching of the infrared optical filter 9 can be completed, similarly, the switching of the transparent optical filter 10 can be completed by reversely driving the servo motor 2, in the switching process, the optical filter can be separated from the threaded sleeve ring 6 when the optical filter reaches a preset position, the coaxial optical filter can be manufactured without the difficulty of accurately making a camera, and the servo motor 2 is reduced;

meanwhile, after the pressing plate 73 is separated from the threaded sleeve ring 6, because the frame body 8 has certain inertia, the frame body 8 can drive the two groups of optical filters to move continuously, and further the frame body 8 is easy to cause deviation of the optical filters and even extrusion damage, at this time, the buffer plate 26 and the rubber tube 25 can play a role in buffering the frame body 8, the rubber tube 25 is compressed under extrusion of the frame body 8, so that the optical filters can deviate to a certain extent, and the image pickup effect is influenced, meanwhile, because the servo motor 2 can also rotate at a reduced speed under inertia after being stopped, the threaded sleeve ring 6 can move for a certain distance after being contacted with the key 12, so that the threaded sleeve ring 6 can push the ejector rod 29 and the piston 28 to move, the inert gas in the sleeve 27 is extruded into the rubber tube 25, so that the rubber tube 25 extends, and further the compression amount generated when the frame body 8 moves inertially is offset, so that the optical filters can keep alignment, and further ensure the image pickup effect.

In addition, in the process of switching the infrared filter 9, the reel 13 also winds the connecting rope 14 to enable the sliding plate 15 to move towards the right side, so that the second corrugated pipe 17 can be stretched to generate negative pressure, a check valve in the second pipeline 21 is opened, dust suction treatment can be performed on two sides of the whole infrared filter 9 moving in the switching process through the second pipeline 21, the branch pipes 22 of the second pipeline 21 and the dust suction holes 23, dust stained on two sides of the infrared filter 9 can be removed, the image pickup quality is ensured, meanwhile, the first corrugated pipe 16 can be compressed, and the exhaust hole 19 and the check valve in the first corrugated pipe 16 are opened to exhaust and discharge dust; similarly, in the process of switching the transparent filter 10, dust on two sides of the transparent filter 10 is also absorbed, so that the shooting quality of the camera is ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a built-in two optical filter switching mechanism for in camera, includes casing (1), draw-in groove (101) have been seted up to the inside of casing (1), through-hole (102) of making a video recording that run through casing (1) have been seted up at the middle part of draw-in groove (101), the one end fixed mounting of casing (1) has servo motor (2), the output fixedly connected with first gear (3) of servo motor (2), one side meshing of first gear (3) has second gear (4), the middle part fixedly connected with of second gear (4) and casing (1) activity cup joint lead screw (5), the middle part threaded connection of lead screw (5) has the screw thread lantern ring (6), the one end joint of screw thread lantern ring (6) has connecting piece (7), the other end fixedly connected with framework (8) of connecting piece (7), the positive both sides of framework (8) respectively fixed mounting have infrared filter (9) and transparent filter (10), its characterized in that: an electromagnet (11) is fixedly installed inside one side, close to the connecting piece (7), of the threaded sleeve ring (6), keys (12) are arranged on the upper side and the lower side of the threaded sleeve ring (6), the connecting piece (7) comprises a main body (71), supporting springs (72) are fixedly connected to the upper portion and the bottom of the main body (71), pressing plates (73) are fixedly connected to the other ends of the supporting springs (72), the two groups of pressing plates (73) are made of armatures, a friction plate located between the two groups of pressing plates (73) is arranged at one end, close to the frame body (8), of the threaded sleeve ring (6), and the length of the side face of the frame body (8) is two thirds of that of the side face of the clamping groove (101);

the dust collection device comprises a lead screw (5), a wire wheel (13) is fixedly connected to one end, close to a second gear (4), of the lead screw (5), a connecting rope (14) is movably sleeved in the middle of the wire wheel (13), a sliding plate (15) is fixedly connected to the other end of the connecting rope (14), a first corrugated pipe (16) is fixedly connected to one end of the sliding plate (15), the other end of the sliding plate is fixedly connected with a shell (1), a second corrugated pipe (17) is fixedly connected to the other end of the middle of the other end of the sliding plate (15), a return spring (18) is fixedly connected to the middle of the sliding plate (15) and arranged in the middle of the sliding plate (15), exhaust holes (19) communicated with the first corrugated pipe (16) and the second corrugated pipe (17) are formed in the two sides of the sliding plate (15), a first pipeline (20) is formed in one end, far away from the sliding plate (15), of the second corrugated pipe (17), a second pipeline (21) is formed in one end, far away from the sliding plate (15), two groups of branch pipes (22) are arranged in the inner wall of the shell (1), and a plurality of branch pipes (22) are arranged in one side, and a plurality of the branch pipes (8) are arranged in a plurality of the group, the equal fixed mounting in both ends of draw-in groove (101) has body (24), body (24) are towards three rubber tube (25) of group of one side fixedly connected with of framework (8), the other end fixedly connected with buffer board (26) of rubber tube (25), the one end fixedly connected with of body (24) and casing (1) fixed connection's sleeve (27), piston (28) have been cup jointed in the inside activity of sleeve (27), piston (28) are towards ejector pin (29) of the equal fixedly connected with in both sides and button (12) looks adaptation in screw thread lantern ring (6) one end middle part, rubber tube (25) and sleeve (27) inside packing have inert gas helium.

2. The built-in dual-filter switching mechanism for the camera head as claimed in claim 1, wherein: and check valves with outward openings are arranged in the two groups of exhaust holes (19).

3. The built-in dual-filter switching mechanism for the camera head as claimed in claim 1, wherein: the inside of first pipeline (20), second pipeline (21) all is provided with the opening towards the inside check valve of respective bellows, and first pipeline (20) keep away from the one end setting of first bellows (16) and keep away from servo motor (2) one-third department in draw-in groove (101) side, the other end setting of second pipeline (21) is close to servo motor (2) one end one-third department in draw-in groove (101) side.