CN111239951A

CN111239951A - Novel pendulum type optical filter self-locking switcher

Info

Publication number: CN111239951A
Application number: CN202010134745.2A
Authority: CN
Inventors: 张学智
Original assignee: Ganzhou Aohaina Photoelectric Co Ltd
Current assignee: Ganzhou Aohaina Photoelectric Co Ltd
Priority date: 2020-01-17
Filing date: 2020-03-02
Publication date: 2020-06-05

Abstract

The invention discloses a novel pendulum type optical filter self-locking switcher, which belongs to the field of optical filter switchers and comprises a base, a lens mount, an optical filter support, an infrared cut-off optical filter, an AR optical filter, a rotating shaft and a driving assembly, wherein the base is provided with a lens mount; the base is provided with an accommodating groove for accommodating the driving assembly; the driving assembly comprises a magnetic poking rod piece; the optical filter bracket is provided with a strip-shaped groove; when one end of the magnetic poking rod piece is abutted against the side wall of the strip-shaped groove to realize the locking state of the optical filter support, the included angle formed between the central axis of the magnetic poking rod piece and the central axis of the strip-shaped groove is 80-100 degrees. The whole camera is in a vibration environment; the optical filter bracket can not rotate, and a self-locking state is achieved; the normal performance and the clear imaging image quality of the camera are ensured; the initial use of the switcher product and the camera is reduced, and the complicated reset operation is reduced.

Description

Novel pendulum type optical filter self-locking switcher

Technical Field

The invention relates to the field of optical filter switchers, in particular to a novel pendulum type optical filter self-locking switcher.

Background

The optical filter is an auxiliary functional component widely used in various video cameras and cameras, for example: when shooting and recording, the light rays in nature in the daytime comprise visible light, infrared rays and ultraviolet rays; only visible light can be seen by naked eyes, and infrared light and ultraviolet light except the visible light can be 'seen' by an image sensor (senser), and the light presents pictures which are not consistent with the pictures seen by the naked eyes (distortion); in order to correct this distortion phenomenon, it is necessary to wear "glasses" (IR filters) on the image sensor (senser). IR filters, which filter out all non-visible light (infrared and ultraviolet); when the vehicle enters a night mode, light rays in the nature are weakened, and hidden requirements of security monitoring are met; emitting 850 or 940 infrared light above the camera, which light is invisible to the naked eye; because the emitted infrared light is cut off by the IR filter; in order to meet the requirement of obtaining a better picture at night, an AR optical filter capable of transmitting infrared light is added to form a double-optical-filter switcher; namely, the IR filter is used in the daytime, the AR filter is used in the evening, and the work is switched circularly.

It can be seen that the prior art filter switching is implemented by a filter switcher; the existing switchers in the current optical filter market are divided into pendulum type switchers, drawer type switchers and motor type switchers; aiming at the following defects mainly existing when the traditional pendulum type optical filter switcher is applied to a camera:

1. vibration is generated in transportation, so that impact is caused on a switcher product and the whole camera; causing a disordered change in the movable filter support; the switcher product and the camera are used for the first time, and the resetting operation is needed; the operation matters are too complicated;

2. the camera is used in a vibrating and bumpy environment, so that impact is caused on a product; the angle between the deflector rod and the optical filter support waist groove is more than 100 degrees, and the optical filter support can rotate under the condition of no power supply as shown in figure 1, so that the movable optical filter support can change disorderly, the self-locking performance is poor, the image distortion is caused, and the performance of the camera is lost;

the above-mentioned defects are the technical difficulties in using the pendulum type optical filter switcher, and up to now, no perfect solution is available in the industry. Therefore, effective solutions to solve the above problems need to be proposed.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a novel pendulum type optical filter self-locking switcher, which solves the problem that the switcher product and the camera complete machine are impacted due to vibration generated in transportation in the prior art; causing a disordered change in the movable filter support; the switcher product and the camera are used for the first time, and the resetting operation is needed; the operation matters are too complicated; the camera is used in a vibration and bumpy environment, so that impact is caused on a product; the angle between the deflector rod and the filter support waist groove is larger than 100 degrees, so that the filter support can rotate under the condition of no power supply, the movable filter support can be disordered and changed, the self-locking performance is poor, the image distortion is caused, and the performance of the camera is lost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a novel pendulum type optical filter self-locking switcher, which comprises a base, a lens mount, an optical filter support, an infrared cut-off optical filter and an AR optical filter, wherein the lens mount is covered above the base; a rotating shaft for the optical filter bracket to be rotatably connected is formed in the inner side of the base in a protruding manner; a first lens window is formed in the base;

the drive assembly is used for driving the optical filter bracket to rotate and realizing the switching between the infrared cut-off optical filter and the AR optical filter;

the base is provided with an accommodating groove for accommodating the driving assembly;

the driving assembly comprises a magnetic shifting rod piece capable of performing rotation switching and self-locking on the optical filter bracket; the optical filter bracket is provided with a strip-shaped groove which forms a self-locking function with the magnetic deflector rod piece;

when one end of the magnetic shifting rod piece is abutted against the side wall of the strip-shaped groove to realize the locking state of the optical filter support, the included angle formed between the central axis of the magnetic shifting rod piece and the central axis of the strip-shaped groove is 80-100 degrees.

Preferably, the magnetic shifting lever comprises a tail rod piece, a connecting rod extending out of the tail rod piece, and a cylindrical shifting lever protruding out of the bottom of the free end of the connecting rod;

the fixed end of the connecting rod is fixedly connected with the outer wall of the tail rod piece; the cylindrical deflector rod is matched with the elongated groove to deflect the optical filter support to rotate, so that the purpose of switching the optical filter is achieved.

Preferably, the driving assembly further includes a coil rack, a coil sleeved on the coil rack, a magnet accommodated in the bottom groove of the magnetic poking rod member, and a magnetic conductive sheet arranged in the accommodating groove of the base;

the upper end part and the lower end part of the magnetic driving lever piece are provided with rotating shafts; the magnetic poking rod piece is connected with the coil rack in a rotating mode through the rotating shaft.

Preferably, the filter support is provided with two mounting grooves for mounting the infrared cut-off filter and the AR filter in parallel; the strip-shaped groove is positioned between the two mounting grooves;

two limiting blocks arranged at intervals are arranged on the edge of the filter support at one side of the opening of the mounting groove; the height of the limiting block is smaller than the depth of the mounting groove.

Preferably, the opening at the front end of the elongated groove is provided with a guide part which is opened towards two sides.

Preferably, the infrared cut-off filter and the AR filter are bonded in the mounting groove by organic glue.

Preferably, the inner bottom wall of the accommodating groove of the base is provided with a sliding groove; the sliding groove is an arc sliding groove, and the sliding groove and a rotating circle of the optical filter support are concentric.

Preferably, the lens mount is provided with a second lens window, and the second lens window is parallel to the first lens window and corresponds to the infrared cut-off filter or the AR filter.

The invention has the beneficial effects that:

according to the novel pendulum type optical filter self-locking switcher, when one end of the magnetic poking rod piece is abutted against the side wall of the elongated groove to achieve a locking state of the optical filter support, an included angle formed between the central axis of the magnetic poking rod piece and the central axis of the elongated groove is 80-100 degrees, the magnetic poking rod piece is abutted against the optical filter support, acting force is perpendicular to the side wall of the elongated groove, and rotating torque on the optical filter support in other directions cannot be generated, so that the optical filter support cannot rotate in a vibration environment, namely, a whole camera is in the vibration environment; the optical filter bracket can not rotate, and a self-locking state is achieved; the normal performance and the clear imaging image quality of the camera are ensured; the magnetic driving lever piece deflects in different directions when current in different directions is introduced; the camera can solve the problem that the whole camera is in a vibration environment; the optical filter bracket can not rotate, and a self-locking state is achieved; the initial use of the switcher product and the camera is reduced, and the complicated reset operation is reduced.

Drawings

Fig. 1 is a schematic diagram of a self-locking structure of a filter self-locking switch in the prior art;

fig. 2 is an exploded schematic view of a novel pendulum type optical filter self-locking switch according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a filter auto-lock switch in a daytime mode according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a night mode of the optical filter self-locking switch according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a filter auto-lock switch in a daytime mode according to a second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a night mode of the optical filter self-locking switch according to the second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a filter auto-lock switch in a daytime mode according to a third embodiment of the present invention;

fig. 8 is a schematic structural diagram of a filter auto-lock switch night mode according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a novel pendulum type optical filter self-locking switch according to an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a base according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a magnetic dial bar according to an embodiment of the present invention.

In the figure:

1. a base; 11. a rotating shaft; 12. a first lens window; 13. an accommodating groove; 14. a chute; 15. a groove; 16. a wire outlet notch; 2. a lens mount; 21. a second lens window; 3. a filter holder; 31. a strip-shaped groove; 311. a guide portion; 32. mounting grooves; 33. a limiting block; 4. an infrared cut filter; 5. an AR filter; 6. a drive assembly; 61. a magnetic toggle member; 611. a tail rod member; 612. a connecting rod; 613. a cylindrical deflector rod; 62. a bobbin; 63. a coil; 64. a magnet; 65. a magnetic conductive sheet; 7. a rotating shaft; 8. copper nut.

Detailed Description

The technical problems to be solved, the technical solutions to be adopted and the technical effects to be achieved by the present invention will be clearer, and the technical solutions of the embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

Example one

Fig. 3 is a schematic structural diagram of a filter auto-lock switch in a daytime mode according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a night mode of the optical filter self-locking switch according to an embodiment of the present invention; as shown in fig. 3-4. The infrared ray absorption device comprises a base 1, a lens seat 2 covered above the base 1, a filter support 3 rotatably arranged in an accommodating groove of the base 1, an infrared cut-off filter 4 attached to the filter support 3, and an AR filter 5 attached to the filter support 3 and capable of increasing the transmittance of infrared rays; a rotating shaft 11 for rotatably connecting the filter bracket 3 is formed in a protruding manner on the inner side of the base 1; a first lens window 12 is arranged on the base 1; wherein be equipped with three connecting holes on the base 1, correspond three connecting holes department on the lens mount 2 and be equipped with the mounting hole, through still being equipped with two copper nuts 8 in the connecting hole, compare traditional plastic hole, the equipment steadiness is better, is difficult for appearing smooth tooth phenomenon for the product installation is more firm, and the user uses more reliably. The device also comprises a driving component 6 which is used for driving the filter support 3 to rotate and realizing the switching between the infrared cut-off filter 4 and the AR filter 5; the base 1 is provided with a containing groove 13 for containing the driving component 6; the driving assembly 6 comprises a magnetic poking rod piece 61 capable of performing rotation switching and self-locking on the optical filter bracket 3; the optical filter bracket 3 is provided with a strip-shaped groove 31 which forms a self-locking function with the magnetic poking rod piece 61; when one end of the magnetic poking rod piece 61 is in contact with the side wall of the long-strip-shaped groove 31 to realize the locking state of the optical filter support 3, the included angle formed between the central axis of the magnetic poking rod piece 61 and the central axis of the long-strip-shaped groove 31 is 80-100 degrees. Fig. 11 is a schematic perspective view of a magnetic dial bar according to an embodiment of the present invention. As shown in fig. 11, preferably, the magnetic pulling rod 61 includes a tail rod 611, a connecting rod 612 protruding from the tail rod 611, and a cylindrical pulling rod 613 protruding from the bottom of the free end of the connecting rod 612; the fixed end of the connecting rod 612 is fixedly connected with the outer wall of the tail rod 611; the cylindrical shift rod 613 is matched with the elongated groove 31 to shift the filter holder 3 to rotate, thereby achieving the purpose of switching the filters. Preferably, the driving assembly 6 further includes a coil frame 62, a coil 63 sleeved on the coil frame 62, a magnet 64 accommodated in the bottom groove of the magnetic dialing member 61, and a magnetic conductive sheet 65 disposed in the accommodating groove 13 of the base 1; the upper end and the lower end of the magnetic poking rod piece 61 are provided with rotating shafts 7; the magnetic pin 61 is rotatably connected to the bobbin 62 via the rotary shaft 7. Specifically, during installation, through embedding magnetic conduction piece 65 in inner groove 15 of accepting groove 13 earlier, magnetic conduction piece 65's shape is the character cut in bas-relief, this shape is more favorable to the performance of this product, magnetic conduction piece fixes in a recess 210 of base, the fixed mode of PCB board 208 and base 2 is for penetrating through the post butt fusion magnet 64 and impressing in magnetism group pole piece 61, coil 63 is wound on coil former 62, and the external connection has been welded, the external connection is drawn forth from base 1's the notch of being qualified for the next round of competitions 16, from reloading to coil former 62, the magnetism group pole piece 61 of adorning magnet 64 is packed into on the transmission hole of coil former 62 through rotation axis 7, can accomplish the standard drive assembly of equipment, and easy dismounting, simple structure, batch production. Preferably, two installation grooves 32 for installing the infrared cut-off filter 4 and the AR filter 5 are arranged on the filter holder 3 side by side; the strip-shaped groove 31 is positioned between the two mounting grooves 32; two spacing blocks 33 arranged at intervals are arranged on the side edge of the filter bracket 3 at one side of the opening of the mounting groove 32; the height of the stop block 33 is smaller than the depth of the mounting groove 32. Specifically, fig. 2 is an exploded schematic view of a novel pendulum type optical filter self-locking switch according to an embodiment of the present invention; as shown in fig. 2, fig. 9 is a schematic structural diagram of a novel pendulum type optical filter self-locking switch according to an embodiment of the present invention; as shown in fig. 2, fig. 10 is a schematic perspective view of a base according to an embodiment of the present invention; as shown in fig. 10, the infrared cut-off filter 4 and the AR filter 5 are square, and two limiting blocks 33 are disposed on the filter holder 3 at intervals corresponding to one side edge of the opening of the infrared cut-off filter 4 and/or the AR filter 5; specifically, in the present embodiment, the height of the stopper 33 is smaller than the depth of the mounting groove 32. Specifically, during installation, the external cut-off filter 4 or the AR filter 5 is inserted from one side of the limiting block 33, and the side walls at the other two sides of the installation groove 32 can play a guiding role, so that the assembly efficiency and the assembly precision can be improved by adopting the fixing mode. Preferably, the opening of the front end of the elongated groove 31 is provided with a guide portion 311 opened toward both sides. The guide portion 311 is convenient for guiding the cylindrical shift rod 613 to be inserted into the elongated groove 31 to drive the filter holder 3 to rotate. Preferably, the infrared cut filter 4 and the AR filter 5 are bonded in the mounting groove 32 by organic glue. It is possible to ensure that the infrared cut filter 4 and the AR filter 5 are stably mounted and positioned in the mounting groove 32. Preferably, the inner bottom wall of the accommodating groove of the base 1 is provided with a sliding groove 14; the sliding groove 14 is a circular arc sliding groove, and the sliding groove 14 and the rotating circle of the optical filter support 3 are concentric. The bottom of the filter holder 3 is further formed with a positioning post (not shown), and the sliding slot 14 guides the positioning post to move in the sliding slot 14. The filter support 3 and the base 1 can be ensured to slide smoothly, the flatness of the infrared cut-off filter 4 and the AR filter 5 can be ensured, and the sliding resistance of the filter support 3 and the base 1 can be reduced. Preferably, the lens holder 2 is provided with a second lens window 21, and the second lens window 21 and the first lens window 12 are parallel to each other and correspond to the infrared cut-off filter 4 or the AR filter 5.

According to a specific working principle, after the pendulum type optical filter self-locking switcher is electrified, the coil 63 can pass through current; a circular magnetic field is generated in the space around the coil 63, and generates an interaction force with the magnet 64 accommodated in the magnetic poking rod piece 61, and the principle that like poles repel each other and opposite poles attract each other is adopted; the filter holder 3 is locked by abutting one end of the magnetic poking rod 61 against the side wall of the elongated groove 31, an included angle formed between the central axis of the magnetic poking rod 61 and the central axis of the elongated groove 31 is 90 degrees, the magnetic poking rod 61 abuts against the filter holder 3, acting force is perpendicular to the side wall of the elongated groove 31, no rotating torque is generated to the filter holder 3 in other directions, and the filter holder 3 cannot rotate under a vibration environment, namely, the whole camera is in a vibration environment; the optical filter bracket 3 can not rotate to reach a self-locking state; the normal performance and the clear imaging image quality of the camera are ensured; the magnetic poking rod piece 61 deflects in different directions when current in different directions is introduced; compared with the prior art, the angle between the deflector rod and the optical filter support waist groove is larger than 100 degrees, so that the optical filter support can rotate under the condition of no power supply, the movable optical filter support can change disorderly, the self-locking performance is poor, the image distortion is caused, and the performance of the camera is lost; the optical filter bracket can not rotate, and a self-locking state is achieved; the initial use of the switcher product and the camera is reduced, and the complicated reset operation is reduced; and the pendulum type self-locking switcher of the application is compared with a market motor type self-locking switcher, and has the advantages of simple structure, high reliability, low cost and the like.

Example two

Fig. 5 is a schematic structural diagram of a filter auto-lock switch in a daytime mode according to a second embodiment of the present invention; fig. 6 is a schematic structural diagram of a night mode of the optical filter self-locking switch according to the second embodiment of the present invention; as shown in fig. 5-6, the difference between the second embodiment and the first embodiment is that an included angle formed between the central axis of the magnetic dialing member 61 and the central axis of the elongated groove 31 is 80 °, the cylindrical dialing member 613 abuts against the filter support 3, and abuts against a component force generated perpendicular to the sidewall of the elongated groove 31, so that the filter support 3 cannot rotate under a vibration environment, that is, when an included angle formed between the central axis of the magnetic dialing member 61 and the central axis of the elongated groove 31 is 80 °, the cylindrical dialing member 613 and the filter support 3 are in a locking state in cooperation, which ensures that the filter support 3 cannot rotate, and a self-locking state is achieved; the normal performance of the camera and the clear imaging image quality are ensured.

EXAMPLE III

Fig. 7 is a schematic structural diagram of a filter auto-lock switch in a daytime mode according to a third embodiment of the present invention; fig. 8 is a schematic structural diagram of a filter auto-lock switch night mode according to a third embodiment of the present invention; as shown in fig. 7-8; the difference between the third embodiment and the first embodiment is that in the third embodiment, an included angle formed between the central axis of the magnetic dialing member 61 and the central axis of the elongated groove 31 is 100 °, the cylindrical dialing member 613 supports the filter support 3, and supports the component force perpendicular to the side wall of the elongated groove 31, and meanwhile, when currents in different directions are applied, the magnetic dialing member 61 can slide into the elongated groove 31 more smoothly to drive the filter support 3 to deflect. The optical filter support 3 is driven to slide on the base 1 in a reciprocating manner by utilizing the rotating magnetic poking rod piece 61 and the long strip-shaped groove 31 on the optical filter support 3, in the third embodiment, the included angle formed between the central axis of the magnetic poking rod piece 61 and the central axis of the long strip-shaped groove 31 is 100 degrees, so that the rotating angle of the magnetic poking rod piece 61 is small, and the length of the magnetic poking rod piece 61 is shorter, thereby not only saving the length space, but also saving the rotating angle, so that the switcher can be manufactured into smaller specification and size, further reducing the equipment volume and saving the space; the overall weight is also reduced.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A novel pendulum type optical filter self-locking switcher comprises a base (1), a lens seat (2) covered above the base (1), an optical filter support (3) rotatably arranged in an accommodating groove of the base (1), an infrared cut-off optical filter (4) attached to the optical filter support (3), and an AR optical filter (5) attached to the optical filter support (3) and capable of increasing the transmittance of infrared light; a rotating shaft (11) for the optical filter bracket (3) to be rotatably connected is formed in the inner side of the base (1) in a protruding manner; a first lens window (12) is formed in the base (1); the method is characterized in that:

the optical filter support is characterized by also comprising a driving assembly (6) which is used for driving the optical filter support (3) to rotate and realizing the switching between the infrared cut-off optical filter (4) and the AR optical filter (5);

the base (1) is provided with an accommodating groove (13) for accommodating the driving component (6);

the driving assembly (6) comprises a magnetic poking rod piece (61) capable of rotationally switching and self-locking the optical filter support (3); the optical filter bracket (3) is provided with a strip-shaped groove (31) which forms a self-locking function with the magnetic poking rod piece (61);

when one end of the magnetic shifting rod piece (61) is abutted against the side wall of the strip-shaped groove (31) to realize the locking state of the optical filter support (3), the included angle formed between the central axis of the magnetic shifting rod piece (61) and the central axis of the strip-shaped groove (31) is 80-100 degrees.

2. The novel pendulum-type optical filter auto-lock switch of claim 1, wherein:

the magnetic shifting rod piece (61) comprises a tail rod piece (611), a connecting rod (612) extending out of the tail rod piece (611), and a cylindrical shifting rod (613) protruding out of the bottom of the free end of the connecting rod (612);

the fixed end of the connecting rod (612) is fixedly connected with the outer wall of the tail rod piece (611); the cylindrical deflector rod (613) is matched with the strip-shaped groove (31) to deflect the optical filter bracket (3) to rotate, so that the purpose of switching the optical filter is achieved.

3. The novel pendulum-type optical filter auto-lock switch of claim 1, wherein:

the driving assembly (6) further comprises a coil rack (62), a coil (63) sleeved on the coil rack (62), a magnet (64) accommodated in a bottom groove of the magnetic poking rod piece (61), and a magnetic conductive sheet (65) arranged in the accommodating groove (13) of the base (1);

the upper end and the lower end of the magnetic poking rod piece (61) are provided with rotating shafts (7); the magnetic poking rod piece (61) is rotatably connected with the coil rack (62) through the rotating shaft (7).

4. The novel pendulum type optical filter auto-lock switch of claim 1 or 2, wherein:

two mounting grooves (32) for mounting the infrared cut-off filter (4) and the AR filter (5) are arranged on the filter support (3) side by side; the elongated groove (31) is positioned between the two mounting grooves (32);

two limiting blocks (33) which are arranged at intervals are arranged on the side edge of the filter support (3) which is positioned at one side of the opening of the mounting groove (32); the height of the limiting block (33) is smaller than the depth of the mounting groove (32).

5. The novel pendulum-type optical filter auto-lock switch of claim 2, wherein:

the opening at the front end of the strip-shaped groove (31) is provided with a guide part (311) which is opened towards two sides.

6. The novel pendulum-type optical filter auto-lock switch of claim 1, wherein:

the infrared cut-off filter (4) and the AR filter (5) are bonded in the mounting groove (32) through organic glue.

7. The novel pendulum-type optical filter auto-lock switch of claim 1, wherein:

a sliding groove (14) is formed in the inner bottom wall of the accommodating groove of the base (1); the sliding groove (14) is an arc-shaped sliding groove, and the sliding groove (14) and a rotating circle of the optical filter support (3) are concentric.

8. The novel pendulum-type optical filter auto-lock switch of claim 1, wherein:

and a second lens window (21) is formed in the lens seat (2), and the second lens window (21) is parallel to the first lens window (12) and corresponds to the infrared cut-off filter (4) or the AR filter (5).