CN115484416B

CN115484416B - Protection device for camera device and early warning system

Info

Publication number: CN115484416B
Application number: CN202110662722.3A
Authority: CN
Inventors: 刘柳
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Chengdu ICT Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Chengdu ICT Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2023-10-31
Anticipated expiration: 2041-06-15
Also published as: CN115484416A

Abstract

The invention provides a protection device and an early warning system for an image pickup device, and relates to the field of protection of image pickup devices. The protection device comprises an exposure mechanism, wherein the exposure mechanism is arranged on one side of an incident surface of the image pickup device so as to reduce the intensity of light rays emitted into the image pickup device; the exposure mechanism comprises a light source and a photosensitive color-changing piece, wherein the light source can be started to emit exposure light; the photochromic piece is used for receiving the exposure light so as to deepen the color of the photochromic piece. The laser light entering the incident surface of the imaging device can be reduced, and the light intensity of the illuminating imaging device can be reduced. And before the laser irradiates the image pickup device, the light source can be triggered and started, so that the protection device is started in advance before the laser irradiates the image pickup device, the possibility that the laser enters the image pickup device is reduced, and the risk of damage of the image pickup device is reduced.

Description

Protection device for camera device and early warning system

Technical Field

The invention relates to the technical field of camera protection, in particular to a protection device and an early warning system for a camera.

Background

The monitoring camera device is an important basic device for city maintenance safety, and is used as an optical element, and is used for converting an optical image ranging from visible light to near infrared spectrum on the target surface of the image sensor into a video image signal when in operation, and then transmitting the acquired video image signal into a monitoring system. Both the image sensor and the optical lens are optical elements working by means of the characteristic of sensitivity to light, and related optical elements in the image pickup device can be damaged to different degrees under the irradiation of high-intensity light such as laser, so that the acquired image is blurred. In order to protect the image pickup device, a protection device is arranged on an incident surface of the image pickup device in the related art to weaken or absorb laser light incident to the image pickup device, but the protection effect of the related protection device is poor, and potential safety hazards that the image pickup device is damaged still exist.

Disclosure of Invention

In view of the above, the present invention provides a protection device and an early warning system for an image capturing device to solve the technical problem of how to improve the protection effect of the image capturing device.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

an embodiment of the present invention provides a protection device for an image pickup apparatus, including: an exposure mechanism arranged on one side of an incident surface of the image pickup device to reduce the intensity of light incident on the image pickup device; the exposure mechanism includes: a light source which can be turned on to emit exposure light; and the photochromic piece is used for receiving the exposure light so as to deepen the color of the photochromic piece.

Further, the exposure mechanism further includes: the first shell is internally provided with a first cavity with two through ends, and the photochromic piece is positioned in the first cavity to seal one end of the first cavity; the first shell is provided with an exposure channel communicated with the first cavity, and the exposure channel is used for accommodating the light source; the exposure light is transmitted to the photochromic piece through the exposure channel and the first cavity.

Further, the exposure mechanism further includes: the reflecting piece is positioned in the first cavity; the light reflecting piece is provided with a light reflecting surface adjacent to the exposure channel so as to reflect the exposure light towards the photochromic piece; the light scattering lens is arranged in the first cavity and is positioned between the light reflecting piece and the photochromic piece, and is used for receiving light reflected by the light reflecting surface and transmitting the light to the photochromic piece.

Further, the astigmatic lens includes: the cylindrical lens is arranged in the first cavity and positioned between the light reflecting piece and the photochromic piece so as to transmit light reflected by the light reflecting surface; and the convex lens is arranged on the surface of the cylindrical lens, which is close to the photochromic piece, so as to refract the light passing through the cylindrical lens to the photochromic piece.

Further, the exposure mechanism further includes: a grating lens provided at the other end of the first cavity opposite to the one end; the surface of the grating lens is parallel to the surface of the photochromic piece; the pressing piece is arranged around the grating lens and abuts against one side of the reflecting piece opposite to the reflecting surface; and the pressing piece is provided with a laser sensor adjacent to the grating lens so as to detect the laser intensity transmitted through the grating lens.

Further, a plurality of exposure channels are circumferentially arranged on the first shell, and each exposure channel is used for accommodating one light source; the laser sensor is also used for determining the number of the turned-on light sources according to the laser intensity.

Further, the protection device further includes: a blocking mechanism, which is arranged on one side of the incident surface of the image pickup device and is arranged in sequence with the exposure mechanism so as to block at least part of light rays emitted into the image pickup device; the blocking mechanism includes: the second shell is internally provided with a hollow second cavity, and is provided with a through hole communicated with the second cavity, and the through hole is used for light to pass through; a shut-off element for filtering at least part of the incident light; the shutoff piece is arranged in the second cavity; and the driving piece is used for driving the shutoff piece to switch between a first position for blocking the through hole and a second position for opening the through hole.

Further, the turnoff pieces are provided with a plurality of stacked layers, and the laser light filtered by each turnoff piece is not identical.

Further, the driving member includes: a rotating shaft at least partially disposed within the second cavity; the rotary disengaging assembly is sleeved on the rotating shaft and is connected with the shutoff piece; wherein, in the first position, the rotary disengaging assembly is connected with the rotating shaft so as to rotate along with the rotating shaft to drive the shutoff piece to rotate to the second position; in the second position, the rotational decoupling assembly is decoupled from the rotational axis.

Further, the rotational decoupling assembly comprises: the disengaging piece is sleeved on the rotating shaft and is movably connected with the shutoff piece; the separating sleeve is sleeved on the rotating shaft and fixed with the second shell, and the separating sleeve is sleeved on the separating piece and is connected with the separating piece in a sliding way; wherein, in the first position, the disengaging piece is connected with the rotating shaft so as to rotate along with the rotating shaft to drive the shutoff piece to rotate to the second position; during the rotation, the release member moves in the axial direction of the rotation shaft along the release sleeve to release the connection with the rotation shaft at the second position.

Further, the rotating shaft is fixed with a connecting sleeve surrounding the rotating shaft, and the disengaging piece is sleeved on the connecting sleeve and can be connected with and disengaged from the connecting sleeve; a first connecting piece is arranged on the inner wall of the separation sleeve; the outer surface of the disengaging piece is provided with a second connecting piece connected with the first connecting piece; in the process that the separating piece is connected with the connecting sleeve to rotate along with the rotating shaft, the second connecting piece moves along the first connecting piece to drive the separating piece to move along the axial direction relative to the connecting sleeve until the separating piece is separated from the connecting sleeve; wherein the first or second connection member extends spirally around an axial direction of the rotation shaft.

Further, the rotational decoupling assembly further comprises: the elastic piece is sleeved on the rotating shaft and is adjacent to the separating piece, so that restoring force of the separating piece close to the connecting sleeve is provided.

Further, the shut-off member is sleeved on the rotating shaft, the shut-off member comprises a third connecting member arranged along the axial direction of the rotating shaft, the disengaging member comprises a fourth connecting member connected with the third connecting member, and the third connecting member and the fourth connecting member can move relatively.

Further, the blocking mechanism further includes: and the locking piece is used for locking and unlocking the shut-off piece at the second position.

Further, the locking member includes: a third housing secured to the second housing, the interior having a third cavity adjacent the second location of the shut-off member; the electromagnetic assembly is arranged in the third cavity, and one end of the electromagnetic assembly is fixedly connected with the third shell; the spring is partially sleeved on the electromagnetic assembly; a projection abutting an end of the spring remote from the electromagnetic assembly, the projection being movable between a position proximate to the electromagnetic assembly and a position at least partially protruding from the third housing; the lug is clamped with the shutoff piece at the second position; wherein the electromagnetic assembly is capable of securing and releasing the tab to lock and unlock the shutoff.

Further, the blocking mechanism further includes: and the reset piece is sleeved on the rotating shaft so as to provide a force for rotating the shut-off piece from the second position to the first position under the condition of unlocking.

Further, the blocking mechanism further includes: the spacer is arranged in the second cavity and fixedly arranged with the second shell, and the spacer forms a groove communicated with the through hole; the shut-off member moves within the recess to switch between the first position and the second position; wherein the spacer is disposed at a distance from the shut-off member.

Further, a buffer is provided on the spacer, adjacent to the shut-off member in the first position.

Further, the device also comprises a mounting structure for connecting the exposure mechanism and the image pickup device; the mounting structure includes: the fixing piece is used for being fixedly connected with the image pick-up device; the first angle adjusting piece is connected with the fixing piece and the exposure mechanism and is used for adjusting the angle of the exposure mechanism relative to the image pick-up device.

Further, the first angle adjuster includes: a linkage assembly having a plurality of relatively rotatable links to adjust the angle.

Further, the device also comprises a mounting structure, wherein the mounting structure is used for connecting the exposure mechanism with the image pickup device and connecting the blocking mechanism with the image pickup device; the exposure mechanism is arranged close to the image pickup device relative to the blocking mechanism and is fixed with the blocking mechanism.

Further, the mounting structure includes: the fixing piece is used for being fixedly connected with the image pick-up device;

the first angle adjusting piece is connected with the fixing piece and the blocking mechanism and is used for adjusting the angles of the blocking mechanism and the exposure mechanism relative to the image pick-up device; the second angle adjusting piece is fixed on the exposure mechanism and used for adjusting the angles of the blocking mechanism and the exposure mechanism relative to the image pickup device.

Further, the second angle adjusting member includes: a connecting ring which is abutted against one side of the exposure mechanism, which is close to the image pickup device; the adjusting support pieces are fixedly connected with the connecting ring and are arranged in a plurality of at intervals along the circumferential direction of the connecting ring so as to form a placing space for placing the camera device; the adjusting bolt penetrates through the adjusting support piece to the placing space; the adjusting bolt is in threaded connection with the adjusting support piece, and the distance that the adjusting bolt stretches into the placing space is adjusted, so that the angle of the camera device is adjusted.

The embodiment of the invention provides an early warning system for an image pickup device, which comprises the following components: the laser sensing device is used for sensing laser close to the image pickup device and generating a sensing signal; at least one protection device as described above for being activated in a state in which the induction signal is received.

The embodiment of the invention provides a protection device and an early warning system for an image pickup device, wherein the protection device comprises an exposure mechanism arranged on one side of an incident surface of the image pickup device, the exposure mechanism comprises a light source and a photosensitive color changing piece, the light source is started to emit exposure light, and the exposure light irradiates the photosensitive color changing piece, so that the color of the photosensitive color changing piece is deepened, the laser irradiated into the incident surface of the image pickup device can be reduced, and the light intensity of the irradiated image pickup device is reduced. And before the laser irradiates the image pickup device, the light source can be triggered and started, so that the protection device is started in advance before the laser irradiates the image pickup device, the possibility that the laser enters the image pickup device is reduced, and the risk of damage of the image pickup device is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a protection device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an exposure mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an astigmatic lens according to an embodiment of the present invention;

FIG. 4a is a schematic perspective view of an exposure mechanism according to an embodiment of the present invention;

FIG. 4b is a schematic perspective view of an exposure mechanism according to another embodiment of the present invention;

FIG. 5 is a schematic structural view of a blocking mechanism according to a first embodiment of the present invention;

FIG. 6a is a schematic structural diagram of a blocking mechanism according to a second embodiment of the present invention;

fig. 6b is a schematic perspective view of a blocking mechanism according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a blocking mechanism according to a third embodiment of the present invention;

fig. 8 is a schematic structural view of a blocking mechanism according to a fourth embodiment of the present invention;

fig. 9 is a schematic diagram illustrating the disassembly of the blocking mechanism according to the embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of the locking element of FIG. 5;

FIG. 11 is a schematic structural view of a mounting structure according to an embodiment of the present invention;

FIG. 12 is a schematic view of a second angle adjusting member according to an embodiment of the present invention;

fig. 13 is a schematic connection diagram of an exposure mechanism and a blocking mechanism according to an embodiment of the present invention.

Reference numerals illustrate:

1. an image pickup device; 2. an exposure mechanism; 21. a first housing; 21a, a first cavity; 22. a light source; 22a, exposure channels; 22b, internal threads; 23. a photosensitive color change member; 24. a light reflecting member; 24a, a light reflecting surface; 25. an astigmatic lens; 25a, cylindrical lenses; 25b, convex lenses; 26. a grating lens; 27. a pressing member; 27a, mounting grooves; 28. a laser sensor; 3. a blocking mechanism; 3a, installing a connecting block; 31. a second housing; 31a, a second cavity; 31b, through holes; 361. a buffer member; 32. a shut-off member; 321. an optical path shut-off member; 322. a first filter cut-off member; 323. a second filter cut-off member; 324. a third connecting member; 325. a reset member; 33. a driving member; 331. a rotating shaft; 331a, connecting sleeve; 332. rotating the disengagement assembly; 34a, a driving gear; 34b, a transmission gear; 34c, driven gears; 341. disengaging the sleeve; 341a, a first connector; 342. a release member; 342a, a second connector; 342b, fourth connection; 343. an elastic member; 35. a locking member; 351. a third housing; 352. an electromagnetic assembly; 353. a spring; 354. a bump; 36. a spacer; 4. a mounting structure; 41. a first angle adjuster; 411. a connecting rod; 412. a mounting base; 42. a fixing member; 421. the second hoop; 422. the first hoop; 43. a second angle adjusting member; 431. a connecting ring; 432. adjusting the supporting sheet; 433. an adjusting bolt; 5. and a fixing rod.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The individual features described in the specific embodiments can be combined in any suitable manner, without contradiction, for example by combination of different specific features, to form different embodiments and solutions. Various combinations of the specific features of the invention are not described in detail in order to avoid unnecessary repetition.

In the following description, references to the term "first/second/are merely to distinguish between different objects and do not indicate that the objects have the same or a relationship therebetween. It should be understood that references to orientations of "above", "below", "outside" and "inside" are all orientations in normal use, and "left" and "right" directions refer to left and right directions illustrated in the specific corresponding schematic drawings, and may or may not be left and right directions in normal use.

It should be noted that 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. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The invention provides a protection device and an early warning system for an image pickup device, wherein the protection device can be applied to the early warning system of the image pickup device such as a monitoring camera. It should be noted that the application scenario type of the present invention is not limited to the protection device of the present invention.

First, a protection principle of a protection device for an image pickup device will be briefly described. Referring to fig. 1, a protection device (reference numerals 2 and 3 in fig. 1) is provided on the incident surface side of the image pickup device 1, and the laser light irradiated to the image pickup device 1 is filtered or blocked by the protection device, so that the laser light irradiated to the incident surface of the image pickup device 1 can be reduced, the light intensity of the irradiated image pickup device is reduced, and the risk of burning the image pickup device when the high-intensity laser light is directly irradiated to the image pickup device is reduced. The laser refers to a photon beam from which atomic stimulated radiation is attracted, and the photon optical characteristics are highly uniform, so that the laser has better monochromaticity and directivity than a common light source, and has higher brightness. The high-intensity laser refers to laser with light intensity larger than conventional light intensity, and has strong corresponding energy, and irradiates on a light-sensitive camera device, so that the temperature of related components becomes high, and the risk of burning the components exists.

The protection device of the present invention will be specifically described below with reference to the case where the protection device is applied to a monitoring image pickup device. As shown in fig. 1, an embodiment of the present invention provides a protection device for an image pickup device, which includes an exposure mechanism 2 for being disposed on one side of an incident surface of the image pickup device 1 to reduce the intensity of light incident on the image pickup device 1. Referring to fig. 2, the exposure mechanism 2 includes a light source 22 and a photochromic member 23. The light source 22 can be started to emit exposure light; the exposure light emitted by the light source 22 refers to a state in which the light source is turned on continuously in a moment after receiving an electrical signal, and the exposure speed is fast and the spectrum is continuous. Alternatively, the light source includes a lamp having excellent instantaneous lighting-off performance such as an exposure lamp. By adopting a mode of electrically controlling the light source, the light source can be triggered to start before the laser irradiates the image pickup device, so that the protection device is started in advance before the laser irradiates the image pickup device. The photochromic member 23 is configured to receive exposure light, and the exposure light deepens the color of the photochromic member 23. It should be noted that the photochromic member means that its color can be changed after being excited by a light source. The principle of color change is that the molecular structure of the related compound changes under the action of light with certain wavelength and intensity, so that the absorption peak value of the light of the photochromic piece changes, namely the color of the photochromic piece is deepened, and the compound capable of deepening under illumination is generally adopted as the raw material of the photochromic piece in the implementation of the invention, and the change process is a reversible process. Optionally, the photochromic member 23 comprises a silver halide lens such as silver bromide, silver iodide, or the like. The principle of the discoloration will be described in detail below using a silver bromide lens as an example of a photochromic member. The light source 22 is controlled by electric power to be turned on, the light source instantly emits exposure light, the exposure light irradiates the silver bromide lens, the silver bromide lens is decomposed into silver and bromine under the light action of certain wavelength and intensity, the decomposed silver is tiny crystal grains, and the lens can be dark brown, so that the light transmittance of the silver bromide lens is reduced, the light quantity irradiated to the incident surface of the camera device is reduced, the light intensity irradiated to the incident surface is weakened, and the risk that the related photosensitive element in the camera device is burnt out under strong light irradiation is reduced. Meanwhile, after the silver bromide lens is irradiated by light, the density of silver on the silver bromide lens is lower, the silver bromide lens also has certain light transmittance, the shooting function of the shooting device is not completely blocked, so that the shooting function of the shooting device can be maintained while the protection device is started, the picture of an external laser operator can be shot, the shooting information can be used for alarming in time or providing evidence for subsequent reconnaissance and evidence collection, and the risk of damage of the shooting device in the protected process is reduced. Optionally, copper oxide can be added into the silver bromide lens, and under the condition that the exposure light irradiates the silver bromide lens, the silver bromide is decomposed into silver and bromine, so that the silver bromide lens becomes dark brown; under the condition that exposure light is darkened or turned off, silver and bromine regenerate silver bromide under the catalysis of copper oxide, and the copper oxide can accelerate the lightening speed of the silver bromide lens, so that the original light transmittance of the silver bromide lens is quickly recovered, and the speed of recovering the shooting image quality of the camera is improved.

In some embodiments, as shown in fig. 2, the exposure mechanism 2 further includes a first housing 21, where the first housing 21 has a first cavity 21a penetrating through two ends, and it should be noted that the penetrating two ends refers to that two ends of the first cavity 21a penetrate through the first housing 21, so that two ends of the first housing 21 are opened. The photochromic member 23 is located in the first cavity 21a to close one end (right end in the drawing) of the first cavity so that one end of the first cavity through which both ends pass is closed. The first housing 21 is provided with an exposure passage 22a, and the exposure passage 22a is used for accommodating the light source 22. The exposure passage 22a is provided on the side of the first housing 21, and the exposure passage 22a is provided in a hole shape, one end of the exposure passage 22a is connected to the first cavity 21a, and the other end opposite to the one end is connected to the outside through the first housing 21. When the light source 22 is turned on, the exposure light emitted from the light source 22 is transmitted to the first cavity 21a through the exposure channel 22a, and is transmitted from the first cavity 21a to the photochromic member 23. Alternatively, the exposure channel may be provided as an inclined hole channel, the exposure channel being provided obliquely toward the photosensitive color change member. When external laser irradiates the photochromic member 23, the photochromic member 23 is turned on in advance to protect the photochromic member 23, and only part of the laser light can be transmitted through the photochromic member 23 after the photochromic member is turned on, and the transmitted part of the laser light passes through the first cavity 21a and is emitted from the other end of the first cavity 21a opposite to the photochromic member 23. The structure of the exposure channel is adopted, the channel of the first cavity is not occupied, then the setting of the light source can not block the shooting picture of the shooting device, and the quality of the shooting device acquisition picture is improved.

In some embodiments, as shown in fig. 2, an internal thread 22b is disposed at the position of the exposure channel 22a in the first housing 21, an external thread is disposed on the outer wall of the light source 22, and the light source 22 is connected with the first housing 21 through threads, so that the light source can be detached and replaced independently, and further the maintenance cost is reduced. Optionally, an electrode is provided at an end of the light source 22 facing the first cavity 21a, the electrode being adapted for contact connection with an associated control mechanism within the first housing for controlling the power to the light source; in other embodiments, the light source may also be in the form of an electrical cord that is electrically connected to the associated control components. By providing the exposure mechanism with a light source that can be actively turned on by the protection device, the exposure mechanism can be turned on before the laser beam that externally irradiates the imaging device, thereby protecting the imaging device. The other end of the light source 22, which is away from the first cavity 21a, is provided with a holding part for increasing the contact friction force of the end part, so that the acting force for rotating the light source in the mounting or dismounting process is conveniently saved; optionally, the other end of the light source 22 facing away from the first cavity 21a may be configured as a hexagonal hole, so as to facilitate the cooperation operation by using a standard tool in the disassembly and assembly process.

In some embodiments, as shown in fig. 2, the exposure mechanism 2 further includes a light reflecting member 24 and a light diffusing lens 25. The reflector 24 is positioned in the first cavity 21 a; the light reflecting member 24 has a light reflecting surface 24a adjacent to the light exposing channel 22a, and it should be noted that, adjacent means that the light reflecting surface 24a is adjacent to the light exposing channel 22a, and beside the light exposing channel 22a, the light reflecting surface 24a is inclined at a certain angle relative to the inner wall of the light exposing channel 22a, and the light reflecting surface 24a can adjust the angle of the light exposing light in the light exposing channel 22a, so that the light exposing light reflects on the light reflecting surface 24a, and the light exposing light can enter the first cavity 21a more easily towards the photochromic member 23. The relative inclination angle of the light reflecting surface 24a can be adjusted according to the inclination setting of the exposure channel 22 a. Specifically, the light reflecting member 24 is configured as a conical ring, and it should be noted that the conical ring refers to a coaxial cylindrical through hole formed after a portion except for the vertex is cut off on the basis of a regular cone. The cross-sectional area of the cylindrical through hole is larger than or equal to the collecting surface of the camera device, the optional cylindrical through hole is a cylindrical hole, the cross-sectional area of the cylindrical hole is equal to the collecting surface area of the camera device, and the cross-sectional area of the photosensitive color-changing piece can be larger than or equal to the cross-sectional area of the cylindrical hole. Wherein, photochromic spare and cylinder hole overlap the setting with camera device's collection face at least partially, are convenient for cover camera device with photochromic spare, and then play guard action, and the cylinder hole also can not shelter from camera device's collection face simultaneously, reduces camera device picture by the risk of sheltering from, and then improves camera device's picture acquisition quality. The light-diffusing lens 25 is disposed in the first cavity 21a and between the light-reflecting member 24 and the photochromic member 23, and it should be noted that the light-diffusing lens 25 may be disposed between the light-reflecting surface 24a and the photochromic member 23, and the light-diffusing lens 25 refers to a lens capable of refracting the exposure light in a certain direction; after the light source 22 in the exposure channel 22a is started, part of exposure light irradiates the reflecting surface 24a after passing through the exposure channel 22a, and the light reflected by the reflecting surface 24a can reach the photochromic piece 23 after passing through the astigmatic lens 25. The astigmatic lens 25 adjusts the exposure light in the exposure channel 22a, so that more exposure light irradiates toward the photochromic member, and the exposure efficiency is improved, thereby accelerating the response speed of the protection device and further improving the sensitivity of the protection device. Specifically, the exposure channel 22a is disposed at a side portion of the first housing 21, an axis of the exposure channel 22a may be perpendicular to an axis of the first cavity 21a, and the astigmatic lens 25 may be disposed in a gap between the reflective surface 24a and the first housing 21. Alternatively, a plurality of diffusing lenses may be disposed around the gap between the light reflecting member and the first housing, or the diffusing lenses may enclose a lens ring along the gap between the light reflecting member and the first housing.

In some embodiments, as shown in fig. 3, the astigmatic lens 25 includes a cylindrical lens 25a and a convex lens 25b. Referring to fig. 2, a cylindrical lens 25a is disposed in the first cavity 21a and between the reflecting surface 24a and the photochromic member 23, one end of the cylindrical lens 25a is close to the photochromic member 23, the other end of the cylindrical lens 25a opposite to the one end is far away from the photochromic member 23, one end of the cylindrical lens 25a far away from the photochromic member 23 is close to the reflecting surface 24a, and the cylindrical lens 25a is used for receiving light in the exposure channel 22a, where the light includes light reflected by the reflecting surface 24a and light not reflected by the reflecting surface 24 a. The convex lens 25b is disposed on the surface of the cylindrical lens 25a, which is close to the photochromic member 23, and it is to be noted that the convex lens is made according to the refraction principle of light, after the light passing through the cylindrical lens 25a reaches the convex lens 25b, the light will be refracted on the convex lens 25b, and the convex lens 25b can refract more light onto the photochromic member 23 by adjusting the angle of the light, thereby improving the utilization efficiency of the light source.

In some embodiments, as shown in fig. 2, the exposure mechanism 2 further includes a grating lens 26 and a pressing member 27. The grating lens 26 is provided at the other end of the first cavity 21a opposite to the one end; one end (right end shown in fig. 2) of the first cavity 21a is provided with a photochromic member 23, and the other end (left end shown in fig. 2) opposite to the one end in the first cavity 21a is an end opposite to the photochromic member 23. The surface of the grating lens 26 is parallel to the surface of the photochromic piece 23, so that light entering from the photochromic piece 23 can directly pass through the grating lens 26, and the situation of excessive refraction caused by the relative inclined arrangement of the grating lens 26 and the photochromic piece 23 is reduced, so that the problem of detection sensitivity reduction caused by the increase of a light path due to refraction is solved. The pressing member 27 is disposed around the grating lens 26, and it should be noted that the pressing member 27 is disposed around the grating lens 26, and the pressing member 27 abuts against the periphery of the grating lens 26. The abutting piece 27 abuts against one side of the reflecting piece 24 opposite to the reflecting surface 24a, specifically, in the case where the reflecting piece 24 is provided as a conical ring, the inner surface of the reflecting piece 24 may be provided as an inclined surface, which inclined surface may be parallel to the outer surface, that is, the thickness of the entire reflecting piece is equal, and the surface of the abutting piece 27 in contact with the reflecting piece 24 may be provided as a conical surface converging inward, so that the outer side surface of the abutting piece 27 is more tightly attached to the surface against which the reflecting piece abuts. Alternatively, the size of the grating lens 26 may be equal to the size of the hole at the end of the light reflecting member 24 near the photochromic member 23. Specifically, the outer peripheral surface of the pressing member 27 is provided with external threads, the inner wall of the first housing 21, which is close to one end of the pressing member 27, is provided with internal threads, the pressing member 27 is rotationally connected with the threads of the first housing 21, and the acting force of the pressing member 27 against the reflecting member 24 is controlled by adjusting the relative meshing degree of the threads, so that the pressing member 27 is tightly attached to the reflecting member 24. Referring to fig. 4a, a mounting groove 27a is further formed in the circumferential direction of the pressing member 27, and the mounting groove 27a is formed in one end of the pressing member 27, which is close to the grating lens 26, so that the grating lens can be mounted and dismounted conveniently. The pressing member 27 is provided with a laser sensor 28 adjacent to the grating lens 26, and the adjacent means that the laser sensor 28 may be attached to the side of the grating lens 26 or the laser sensor 28 and the side of the grating lens 26 are disposed with a gap therebetween. The laser sensor 28 is used to detect the intensity of the laser light transmitted through the grating lens 26. Specifically, the plurality of laser sensors 28 may be provided, and the plurality of laser sensors 28 are provided in the circumferential direction of the pressing member 27 for improving the accuracy of detection. After passing through the photochromic member 23, the laser irradiates the grating lens 26 from the first cavity 21a, the amount of light transmitted through the grating lens is detected by arranging the laser sensor 28, the detected amount of light is used for judging the level of the response required by the protection device, and the protection device is controlled to further execute the protection action according to the response signals of different levels.

In some embodiments, as shown in fig. 4a, a plurality of exposure channels 22a are provided in the circumferential direction of the first housing 21, and it should be noted that the circumferential direction refers to a direction around the first housing 21. Each exposure channel 22a is for accommodating one light source; the exposure mechanism 2 in the embodiment of the invention can be provided with a plurality of light sources, under the condition that the laser sensor 28 transmits the light quantity transmitted through the grating lens 26 to the relevant control mechanism, the corresponding protection level can be determined according to the judgment of the laser intensity, the number of the turned-on light sources is controlled according to the protection level, the exposure intensity is further controlled, the control of the color changing intensity of the photochromic piece 23 (refer to fig. 4 b) is realized, the exposure degree is controlled according to the light quantity signal monitored in real time, resources are reasonably utilized, and the loss caused by resource waste is reduced; meanwhile, exposure is controlled according to different protection levels, and the risk that the image acquisition device acquires images due to unreasonable exposure can be reduced.

In some embodiments, referring to fig. 1, the protection device further comprises a blocking mechanism 3. The blocking mechanism is disposed on one side of the incident surface of the image pickup device 1 and is disposed sequentially with the exposure mechanism 2, and it should be noted that the sequential arrangement refers to that the exposure mechanism 2 and the blocking mechanism 3 are disposed in an arrangement order, and in some embodiments, the exposure mechanism 2 may be disposed at a front end (a right end shown in fig. 1) of the image pickup device 1, and the blocking mechanism 3 may be disposed at a front end (a right end shown in fig. 1) of the exposure mechanism 2; in another embodiment, the blocking mechanism may be provided at the front end of the imaging device, and the exposure mechanism may be provided at the front end of the blocking mechanism. (only the sequential manner in the previous embodiment is shown in fig. 1). The blocking mechanism in the embodiment of the present invention is described below by taking an example that the blocking mechanism is disposed at the front end of the exposure mechanism, where the blocking mechanism is used to block at least part of the light rays incident to the image capturing device, and it should be noted that the blocking device may specifically adopt a mechanical isolation manner to completely isolate the light rays, or may filter a plurality of lasers with specified colors to weaken the light intensity. The protection device provided by the embodiment of the invention further comprises the blocking mechanism on the basis of having the exposure mechanism, so that the blocking mechanism can be further opened on the basis of opening the exposure mechanism under the condition that the intensity of externally irradiated laser is sensed to be large, and the protection of the camera device is further improved; furthermore, the blocking structure can be provided as a multi-stage turn-off mechanism, for example, the blocking structure can be used for partially filtering and weakening light intensity, or completely turning off incident light.

In the embodiment of the present invention, as shown in fig. 5, the blocking mechanism 3 includes a second housing 31, a shut-off member 32, and a driving member 33. The second housing 31 has a hollow second cavity 31a therein, and the second housing 31 is provided with a through hole 31b communicating with the second cavity 31a, the through hole 31b being for light to pass through. The light is light that is emitted from the outside into the protection device. The through hole 31b is capable of passing light entering from outside at least partially. The shut-off element 32 is used to filter at least part of the incoming light, by filtering is meant blocking a part of the light directed towards the blocking means 3. Alternatively, the shut-off element 32 may be provided as a filter shut-off element as well as a blocking shut-off element. The filter Guan Duanpian refers to a filter having a specified color, which can filter light of colors other than the specified color, thereby filtering part of laser light and thus weakening light intensity, for example: the red filter Guan Duanpian is adopted as a shutoff piece, so that light rays except red can be blocked; the light other than green can be blocked by using the green filter Guan Duanpian as the shut-off member. When the cut-off element is provided as a filter cut-off element, part of the light can still be irradiated onto the imaging device, so that the imaging device can also shoot through the filter cut-off element. The blocking switch means that light can be completely isolated, the light irradiated onto the blocking switch is completely absorbed or reflected, the light cannot be irradiated onto the image pickup device under the blocking of the blocking switch, and in this state, the image pickup device cannot pick up a picture with brightness. The shut-off member 32 is disposed in the second cavity 31a, and the driving member 33 drives the shut-off member 32 to switch between a first position blocking the through hole 31b and a second position opening the through hole 31 b. It should be noted that, the first position refers to a position where the shut-off member 32 and the through hole 31b completely overlap, so that the light passing through needs to be completely irradiated to the shut-off member 32; the second position refers to a position other than the first position in the second cavity 31a in which there is no overlapping portion of the shut-off member 32 and the through hole 31 b. The driving member 33 includes, but is not limited to, a linear motor, a gear motor, and the like. Alternatively, in the case where the driving member 33 is configured as a linear motor, the linear motor drives the shut-off member to translate between the first position and the second position, thereby realizing blocking and opening of the through hole.

In an embodiment, referring to fig. 6a and 6b, the driving member 33 is a gear motor, the driving member 33 is meshed with the driving gear 34a, the driving gear 34a drives the driving gear 34b to drive, the driving gear 34b is meshed with the driven gear 34c, the shut-off member 32 is connected with the driven gear 34c, the driving gear 34a is driven to rotate by the driving member 33, and further the driving member 33 drives the shut-off member 32 to rotate, and the driving member 33 drives the shut-off member 32 to rotate between the first position and the second position, so that the shut-off member rotates between the first position blocking the through hole and the second position opening the through hole. Alternatively, the driven gear is configured as a ratchet wheel, and the rotation shaft can be quickly rotated back to the first position without moving the shutter before rotating the shutter from the second position to the first position.

In some embodiments, as shown in fig. 7, the shutdown member 32 has a plurality of stacked layers, and it should be noted that, by stacking, the plurality of shutdown members 32 may overlap the second cavity with a certain gap. The lasers filtered by each cut-off element 32 are not identical, and optionally, a plurality of cut-off elements 32 can be set as filters with different colors for filtering light rays except for the set colors; an optical path shut-off member may be provided for blocking light irradiated onto the blocking mechanism. In a specific embodiment, the shutoff member 32 is provided with an optical path shutoff member 321, a first filtering shutoff member 322 and a second filtering shutoff member 323, where the first filtering shutoff member 322 is provided as a red shutoff member, and is used for filtering light rays with wavelengths other than red; the second filter cut-off member 323 is configured as a green cut-off member for filtering light rays of wavelengths other than green; the light path shut-off 321 is for blocking light of all colors; the shut-off elements described above may work alone or in combination during blocking to achieve a specified level of shut-off protection.

In some embodiments, as shown in fig. 6a, the drive 33 includes a rotational shaft 331 and a rotational disengagement assembly 332. The rotation shaft 331 is at least partially disposed in the second cavity (refer to 31a in fig. 5), and it should be noted that the rotation shaft 331 may be partially disposed in the second cavity 31a or may be disposed in the second cavity 31a entirely. The rotation shaft 331 is adapted to follow the rotation of the drive motor (at the position indicated by 33 in fig. 6 a). The specific driving manner may be implemented by referring to the manner in the foregoing embodiment, and will not be described in detail. The rotating disengaging assembly 332 is sleeved on the rotating shaft 331 and is connected with the shutoff piece 32, the rotating disengaging assembly 332 is used for rotating along with the rotating shaft 331 so as to drive the shutoff piece 32 to rotate, and meanwhile, the rotating disengaging assembly also has a function of being disconnected with the rotating shaft 331, is used for realizing that a plurality of shutoff pieces share one driving motor, and can keep the independent work of the shutoff pieces. Specifically, as illustrated in fig. 8, the rotary disconnect assembly is capable of moving the shut-off member between a first position (left side of the drawing) and a second position (right side of the drawing). In the first position, the rotary disengaging assembly 332 is connected to the rotating shaft 331, so as to rotate along with the rotating shaft 331 to drive the shutoff member 32 to rotate to the second position; in the second position, the rotating disengaging assembly 332 is disengaged from the rotating shaft 331, and the current shut-off member will not follow rotation in the case that the rotating shaft rotates the other shut-off member. In the case of a plurality of shutters, one rotational decoupling assembly is associated with each shutter, and independent control of each of the plurality of shutters is achieved by independent connection and disconnection of each rotational decoupling assembly to each shutter.

In some embodiments, as shown in fig. 8, the rotational disconnect assembly 332 includes a disconnect 342 and a disconnect sleeve 341. The disengaging piece 342 is sleeved on the rotating shaft 331 and is movably connected with the shut-off piece 32; it should be noted that, the movable member 342 may be connected to the rotation shaft 331, or may be disconnected from the rotation shaft 331 by a relative movement. The disengaging sleeve 341 is sleeved on the rotating shaft 331 and fixed with the second shell 31, and the disengaging sleeve 341 is sleeved on the disengaging piece 342 and slidably connected with the disengaging piece 342; specifically, the rotation shaft 331, the release member 342, and the release sleeve 341 are sequentially sleeved from inside to outside, where the release sleeve 341 may be partially sleeved with the release member 342. The disengaging sleeve 341 and the second housing 31 remain relatively fixed, and the disengaging member 342 is slidable relative to the disengaging sleeve 341. It should be noted that, the sliding may be realized by a sliding rail or other limiting rails, and an elastic restoring member may be added to realize the restorability of the relative displacement between the release member 342 and the release sleeve 341. Wherein, in the first position (left side in fig. 8), the disengaging member 342 is connected with the rotating shaft 331 to rotate along with the rotating shaft 331 to drive the shut-off member 32 to rotate to the second position (right side in fig. 8); during rotation, the disengaging piece 342 moves in the axial direction of the rotating shaft 331 along the disengaging sleeve 341 to disengage from the rotating shaft 331 at the second position. Specifically, the disengaging piece 342 and the disengaging sleeve 341 can slide relatively, in the process of driving the shut-off piece 32 to rotate, the disengaging piece 342 and the disengaging sleeve 341 are connected with the rotating shaft 331 in a releasing manner through relative sliding, so that the shut-off piece 32 and the rotating shaft 331 are released, and under the condition that the current shut-off piece 32 needs to work, the disengaging piece 342 and the disengaging sleeve 341 recover to be connected initially through relative sliding, so that the disengaging sleeve 341 is connected with the rotating shaft 331, and further the shut-off piece 32 is connected with the rotating shaft 331.

In some embodiments, as shown in fig. 9, the rotating shaft 331 is fixed with a connecting sleeve 331a surrounding the rotating shaft 331, and the disengaging member 342 is sleeved on the connecting sleeve 331a and can be connected with and disconnected from the connecting sleeve 331a, so that the connection and disconnection of the shut-off member 32 and the connecting sleeve 331a are realized, and the connection and disconnection of the shut-off member 32 and the rotating shaft 331 are realized. The inner wall of the disengaging sleeve 341 is provided with a first connecting piece 341a, the outer surface of the disengaging piece 342 is provided with a second connecting piece 342a connected with the first connecting piece 341a, and in the process that the disengaging piece 342 is connected with the connecting sleeve 331a to rotate along with the rotating shaft 331, the second connecting piece 342a moves relative to the first connecting piece 341a to drive the disengaging piece 342 to move relative to the connecting sleeve 331a along the axial direction until the disengaging piece 342 is disconnected with the connecting sleeve 331 a. It should be noted that, the movement 341a of the second connecting piece 342a along the first connecting piece means that the second connecting piece 342a is driven by the rotating shaft 331, the second connecting piece 342a can move upwards along the axial direction relative to the first connecting piece 341a, and the second connecting piece can also move upwards along a straight line relative to the first connecting piece, so as to drive the disengaging piece to disengage from the connecting sleeve. Specifically, the first connecting member or the second connecting member extends spirally around the axial direction of the rotation shaft. The first connecting piece can be provided with a spiral groove extending upwards along the spiral of the inner wall of the separation sleeve, the second connecting piece can be provided with a bulge penetrating into the spiral groove, and the bulge can move upwards along the spiral groove under the action of the connecting sleeve; alternatively, the structures corresponding to the first connecting piece and the second connecting piece may be alternatively arranged, for example, the first connecting piece is arranged as a protrusion, and the second connecting piece is arranged as a spiral groove. In another embodiment, the first connecting piece can be provided as a bulge extending upwards in a spiral way, and the second connecting piece is provided with a thread groove along the axial direction, and the bulge is connected with the thread groove; alternatively, the protrusions and the thread grooves may be alternatively disposed between the first connecting member and the second connecting member. The embodiment of the invention is not limited to a structure that the separation sleeve and the separation piece realize relative movement with the connecting sleeve through relative rotation.

In some embodiments, as shown in fig. 9, the rotational decoupling assembly further includes an elastic member 343, where the elastic member 343 is a member having a deformation and a deformation recovery capability. The elastic member 343 is sleeved on the rotating shaft 331 adjacent to the separating member 342 to provide a restoring force of the separating member 342 near the connecting sleeve 331 a. In the case where the shut-off member 32 is rotated from the first position to the second position, the connection sleeve 331a is connected to the release member 342, the connection sleeve 331a applies an axial force to the release member 342, and the release sleeve 341 is fixedly connected to the second housing, so that the release member 342 is rotated upward (upward direction in fig. 9) with respect to the release sleeve 341. The elastic member 343 may be disposed between the release member 342 and the release sleeve 341, and in particular, the elastic member 343 may be provided as a spring. One end of the elastic member 343 abuts against the upper portion of the release member 342, the other end of the elastic member 343 opposite to the one end abuts against the inner top surface of the release sleeve 341, and the release member 342 presses the spring 343 and compresses until the release member 342 is completely released from the connecting sleeve 331a during the upward movement of the release member 342 relative to the release sleeve 341, and the release member 342 and the release sleeve 341 remain stable. Specifically, a limiting structure for clamping the second connecting piece 342a can be arranged in the first connecting piece 341a of the separation sleeve 341; during the rotation of the shut-off member 32 from the second position to the first position, the shut-off member 32 applies an axial force to the disengaging member 342, the disengaging member 342 breaks a stable state with the disengaging sleeve 341 after receiving the force, the elastic member 343 applies a force for restoring compression to the disengaging member 342, and the disengaging member 342 can move in an opposite direction (downward direction as shown in fig. 9) with respect to the disengaging sleeve 341 until the disengaging member 342 is restored to the connection with the connecting sleeve 331 a.

In some embodiments, as shown in fig. 9, the shut-off member 32 is sleeved on the rotating shaft 331, the shut-off member 32 includes a third connecting member 324 disposed along an axial direction of the rotating shaft 331, the disengaging member 342 includes a fourth connecting member 342b connected to the third connecting member 324, and the third connecting member 324 and the fourth connecting member 342b can relatively move. Specifically, the third connecting member 324 may be configured as a groove, the fourth connecting member 342b may be configured as a protrusion, one end of the shut-off member 32 is movably sleeved with the rotating shaft 331, the sleeved position is provided with the third connecting member 324, and the fourth connecting member 342b is inserted into the third connecting member 324 to limit the axial freedom of the shut-off member 32, so as to drive the shut-off member 32 to move in the axial direction through the disengaging member 342. The third connecting member 324 in one embodiment may be provided as a protrusion, and the fourth connecting member 342b may be provided as a recess, and the present application is not limited to the above-described structure in which the third connecting member and the fourth connecting member achieve the limitation of the degree of freedom of the axis.

In some embodiments, as shown in fig. 5, the blocking mechanism 3 further comprises a locking member 35, the locking member 35 being adapted to lock and unlock the shut off member 32 in the second position. The locking means that the shut-off member 32 is kept at the second position (right side shown in fig. 5), and the current shut-off member cannot move along with the rotating shaft in the process that the rotating shaft drives other shut-off members to rotate, so that the rotating efficiency is improved. Under the condition that the current shutoff piece is required to work, the locking piece can be disconnected with the shutoff piece, so that the shutoff piece is restored to the first position.

In some embodiments, as shown in connection with fig. 5 and 10, the locking member 35 includes a third housing 351, an electromagnetic assembly 352, a spring 353, and a tab 354. The third casing 351 is fixed to the second casing 31, and has a third cavity (an area surrounded by the casing 351 in fig. 10) inside, the third cavity is communicated with the second cavity, the third cavity is specifically communicated with the second cavity of the shut-off member at the second position, the electromagnetic assembly 352 is disposed in the third cavity, and one end of the electromagnetic assembly 352 is fixedly connected with the third casing 351; the spring 353 is partially sleeved on the electromagnetic component 352; the solenoid assembly 352 is energized to cause the spring 353 to compress and de-energized to release the spring 353. The projection 354 abuts an end of the spring 353 remote from the electromagnetic assembly 352, and the projection 354 is movable between a position proximate to the electromagnetic assembly 352 and a position at least partially protruding from the third housing 351; the bump 354 is clamped with the shut-off member 32 in the second position; wherein the solenoid assembly 352 is capable of securing and releasing the tab 354 to lock and unlock the shutdown member 32. Under the action of the electromagnetic component 352, the spring 353 can drive the projection 354 to move, and under the condition that the shut-off member 32 needs to be locked, the projection 354 protrudes out of the third shell 351, and the projection 354 is clamped with the shut-off member 32; when the lock shut-off member 32 needs to be released, the projection 354 is retracted into the third housing 351 by the urging force of the spring 353, and the projection 354 is released from the shut-off member 32. The optional bump 354 is configured as a right triangle, and the shutoff member 32 is provided with an equally shaped limit groove, and the hypotenuse of the right triangle is opposite to the direction of rotation of the shutoff member from the first position to the second position (the left-to-right direction shown in fig. 5).

In some embodiments, referring to fig. 9, the blocking mechanism further includes a return member 325, wherein the return member 325 is sleeved on the rotation shaft 331 to provide a force for rotating the shut-off member 32 from the second position to the first position when the lock is released. Specifically, the restoring member 325 may be provided as a torsion spring capable of effecting rotation in the axial direction and restoring rotation. The reset piece is pressed under the condition that the shut-off piece rotates from the first position to the second position; the restoring member applies a restoring force to the shut-off member in the case that the shut-off member rotates from the second position to the first position. The automatic recovery of the shutoff piece to the first position after unlocking at the second position is realized.

In some embodiments, referring to fig. 7, the blocking mechanism further includes a spacer 36, the spacer 36 being disposed within the second cavity 31a and fixedly disposed with the second housing 31, the spacer 36 forming a groove (the groove shown with reference to fig. 6 a) in communication with the through hole 31 b; the shutter 32 moves within the recess to switch between a first position (left in fig. 6 a) and a second position (right in fig. 6 a); wherein the spacer 36 is spaced apart from the shut off member 32. The spacer arranged in the embodiment of the invention can independently limit the shutoff piece, simplify the structure of the second shell, facilitate production and manufacture, and facilitate disassembly and assembly of the spacer and the second shell and maintenance and replacement.

In some embodiments, referring to fig. 5, a buffer 361 is provided on the spacer, the buffer 361 being adjacent to the shutter 32 in the first position of the shutter 32. Adjacent means the boundary of the region where the buffer is located at the first position of the shut-off member. Under the condition that the shut-off piece rebounds from the second position to the first position, the shut-off piece has the impact property due to the rebounding, and the buffer piece is arranged at the adjacent position of the first position, so that the impact force of part of the shut-off piece and the spacer piece can be absorbed, the risk that the shut-off piece is crashed out is reduced, and the service life of the shut-off piece is prolonged. Specifically, the buffer piece can be set to have the buffering shell fragment of recess of buckling, and under the condition that the shutoff piece impacted the buffering shell fragment, the shutoff piece takes place the used position atress inequality with the buffering shell fragment, and the recess of buckling is pressed and is warp, absorbs partial pressure, plays the cushioning effect. In other embodiments, the buffer spring may be used to buffer the shut-off element, and the embodiment of the present invention is not limited to the above-mentioned arrangement of the buffer element.

The operation of the blocking mechanism is described below with reference to fig. 5-10, taking the blocking mechanism 3 comprising 3 shut-off elements 321,322,323 as an example. In a state that the blocking mechanism 3 is not opened to block the operation, the 3 shutoff members 321,322,323 are located at respective second positions and locked by respective corresponding locking members 35, and light can be transmitted to the image pickup device through the through hole 31b and the cavity 31a formed in the housing 31 of the blocking mechanism 3, so that the normal shooting operation of the image pickup device is not affected. In a state in which the blocking mechanism 3 receives a signal to open the blocking operation, the locking member 35 of at least one of the 3 shut-off members 321,322,323 is unlocked, and then the corresponding shut-off member (for example, the shut-off member 323) is rotated from the second position to the first position (the state in which the shut-off member 323 is in the first position is shown in fig. 7) by the corresponding reset member 325. When the turn-off signal is finished, the turn-off member 323 at the first position needs to be rotated to the second position, and in the rotation process, the rotary disengaging assembly 332 corresponding to the turn-off member 323 is connected with the rotation shaft 331, wherein the indirect connection between the turn-off member 323 and the rotation shaft 331 is realized by driving the disengaging member 342 to be connected with the rotation shaft 331, and in the rotation process, the disengaging member 342 moves along the disengaging sleeve 341, so that the disengaging member 342 is gradually disconnected from the rotation shaft 331 until the turn-off member 323 rotates to the second position, and the disengaging member 342 is completely disconnected from the rotation shaft 331. The shut-off members (321, 322, 323) at the second position are in a disconnected state with the rotating shaft 331, so that other shut-off members (321, 322) cannot rotate along with the rotating shaft 331 in the process that the rotating shaft 331 drives the shut-off member 323 to rotate, and the shut-off members can still independently operate under the condition that a plurality of shut-off members share one power source.

In some embodiments, as shown in fig. 1, the protection device further comprises a mounting structure 4 for connecting the exposure mechanism 2 with the image pickup device 1; the mounting structure 4 includes a fixing member 42 and a first angle adjusting member 41. The mounting is used for with camera device 1 fixed connection, and specifically, the mounting can set up to the staple bolt, can be according to the elasticity of connecting the position regulation connection, and the connected mode is simple and convenient. Optionally, the fixing piece includes a first anchor ear 422 and a second anchor ear 421, where the first anchor ear 422 is used to connect the exposure mechanism 2 and the camera device 1; the second anchor ear 421 is used for connecting the exposure mechanism 2 and the fixing rod 5 for mounting the image pickup device 1. The first anchor ear 422 sets up perpendicularly with second anchor ear 421, can reduce at protection device at the risk of angle regulation in-process not hard up and pivoted. The first angle adjusting member 41 connects the fixing member 42 and the exposure mechanism 2 for adjusting the angle of the exposure mechanism 2 with respect to the image pickup apparatus 1. In the mounting process, the exposure mechanism needs to be attached to the incident surface of the imaging device, so that the risk that laser directly irradiates the incident surface is reduced. Through setting up first angle adjusting part, can adjust again after the mounting is fixed, the installation step is nimble convenient.

In some embodiments, referring to fig. 11, the first angle adjuster 41 includes a link assembly having a plurality of relatively rotatable links 411, and adjusts an angle between a surface of the exposure mechanism and an incident surface of the image pickup device by rotating the links 411. Specifically, the first angle adjusting member 41 further includes a mounting base 412, where the mounting base 412 is rotatably connected to one end of the connecting rod 411 and is rotatably connected to the fixing member 42, so as to implement relative rotation between the imaging device and the exposure mechanism in multiple degrees of freedom. It should be noted that, as shown in fig. 11 and 13, the protection device includes an exposure mechanism 2 and a blocking mechanism 3, the exposure mechanism 2 is fixedly connected with the blocking mechanism 3, the blocking mechanism is provided with a mounting connection block 3a, the mounting connection block 3a is used for connecting the first angle adjusting member 41, and then the exposure mechanism 2 is connected with the image pickup device 1 through the first angle adjusting member 41, and the exposure mechanism 2 is indirectly connected with the image pickup device 1 through the connection blocking mechanism 3 and the image pickup device 1; in the case where the protection device has only the exposure mechanism 2, the exposure mechanism 2 and the image pickup device 1 may be directly connected by the same first angle adjuster 41.

In other embodiments, referring to fig. 1, the protection device includes a mounting structure 4, the mounting structure 4 being used to connect the exposure mechanism 2 with the image pickup device 1 and connect the blocking mechanism 3 with the image pickup device 1; the exposure mechanism 2 is disposed close to the imaging device 1 relative to the blocking mechanism 3, and the exposure mechanism 2 is fixed to the blocking mechanism 3. It should be noted that, the blocking mechanism 3 in the embodiment of the present invention may be close to the image capturing device 1 relative to the exposure mechanism 2.

In some embodiments, referring to fig. 1, the mounting structure 4 includes a securing member 42, a first angle adjustment member 41, and a second angle adjustment member 43. The fixing piece 42 is used for fixedly connecting with the camera device 1; the first angle adjusting piece 41 is connected with the fixing piece 42 and the blocking mechanism 3 and is used for adjusting the angles of the blocking mechanism 3 and the exposure mechanism 2 relative to the camera device 1; the second angle adjuster 43 is fixed to the exposure mechanism 2, and the second angle adjuster 43 is used to adjust the angles of the blocking mechanism 3 and the exposure mechanism 2 with respect to the imaging device 1. The first angle adjuster 41 is used to adjust the angle roughly, and the second angle adjuster 43 is used to adjust the mounting angle of the exposure mechanism 2 and the imaging device 1 directly, so as to adjust the angle finely. Under the effect of dual angle adjustment mechanism, can realize the accurate installation to protection device, promote protection device's protection effect.

In some embodiments, as shown in fig. 12, the second angle adjuster 43 includes a connection ring 431, an adjustment support tab 432, and an adjustment bolt 433. As shown in fig. 1, the connection ring 431 abuts on a side of the exposure mechanism 2 close to the image pickup apparatus 1; the adjusting support piece 432 is fixedly connected with the connecting ring 431 and is provided with a plurality of adjusting support pieces at intervals along the circumferential direction of the connecting ring 431 so as to enclose a placement space for placing the image pickup device 1; the adjusting bolt 433 penetrates the adjusting support piece 432 to the placing space; the adjusting bolt 433 is in threaded connection with the adjusting support piece 432, and the distance that the adjusting bolt 433 stretches into the placing space is adjusted, so that the angle with the image pickup device 1 is adjusted, and the angle between the exposure mechanism 2 and the image pickup device 1 is adjusted. Specifically, the number of the adjusting support plates 432 may be four, and the adjusting support plates 432 are disposed opposite to each other and uniformly disposed on the connection ring 431. One adjusting support piece which is arranged oppositely is provided with an adjusting bolt, and the other adjusting support piece which is arranged oppositely is provided with two adjusting bolts. Through the mode that sets up three adjusting bolt in two liang, when guaranteeing second angle adjusting part and camera device connection stability, also reduce adjusting bolt's use quantity, also can realize angle modulation simultaneously, make adjusting bolt's utilization maximize.

The embodiment of the invention also provides an early warning system for the image pickup device, and the specific structure of the early warning system for the image pickup device in the embodiment of the invention is described in detail below. The early warning system comprises a laser sensing device and a protection device, wherein the laser sensing device is used for sensing laser close to the camera device and generating a sensing signal; the protection device is used for starting in a state of receiving the induction signal. Specifically, the embodiment of the present invention is not limited to the specific structural arrangement of the laser sensing device, and any one of the above embodiments may be used as the protection device in the embodiment of the present invention. And sending an induction signal to the protection device through the laser induction device, wherein the induction signal comprises laser intensity, an alarm grade corresponding to the laser intensity and laser color. And starting the protection action of the corresponding level according to the alarm level. For example, in the first-level alarm state, only the exposure mechanism can be started to work, and the light source is started; in the second-level alarm state, the first filtering shutoff piece in the blocking mechanism can be started while the exposure mechanism is started; and by analogy, in the final alarm state, the light path shutoff piece in the shutoff mechanism can be started to directly block the light passing through the protection device, so that the laser cannot irradiate the camera device, and forced isolation protection is realized. Corresponding mechanisms are started according to different levels of sensing signals, the reliability of protection is high, and the protection efficiency is maximized.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A protective device for an image pickup apparatus, comprising:

an exposure mechanism arranged on one side of an incident surface of the image pickup device to reduce the intensity of light incident on the image pickup device; the exposure mechanism includes:

a light source which can be turned on to emit exposure light;

the photosensitive color-changing piece is used for receiving the exposure light so as to deepen the color of the photosensitive color-changing piece; the first shell is internally provided with a first cavity with two through ends, and the photochromic piece is positioned in the first cavity to seal one end of the first cavity; the first shell is provided with an exposure channel communicated with the first cavity, and the exposure channel is used for accommodating the light source; the exposure light is transmitted to the photosensitive color changing piece through the exposure channel and the first cavity;

a plurality of exposure channels are arranged in the circumferential direction of the first shell, and each exposure channel is used for accommodating one light source;

and the laser sensor is suitable for determining the number of the turned-on light sources according to the detected laser intensity.

2. The protective apparatus of claim 1, wherein the exposure mechanism further comprises:

the reflecting piece is positioned in the first cavity; the light reflecting piece is provided with a light reflecting surface adjacent to the exposure channel so as to reflect the exposure light towards the photochromic piece;

the light scattering lens is arranged in the first cavity and is positioned between the light reflecting piece and the photochromic piece, and is used for receiving light reflected by the light reflecting surface and transmitting the light to the photochromic piece.

3. The protective apparatus of claim 2, wherein the astigmatic lens comprises:

the cylindrical lens is arranged in the first cavity and positioned between the light reflecting piece and the photochromic piece so as to transmit light reflected by the light reflecting surface;

and the convex lens is arranged on the surface of the cylindrical lens, which is close to the photochromic piece, so as to refract the light passing through the cylindrical lens to the photochromic piece.

4. The protective apparatus of claim 2, wherein the exposure mechanism further comprises:

a grating lens provided at the other end of the first cavity opposite to the one end; the surface of the grating lens is parallel to the surface of the photochromic piece;

The pressing piece is arranged around the grating lens and abuts against one side of the reflecting piece opposite to the reflecting surface; the pressing piece is provided with the laser sensor adjacent to the grating lens so as to detect the laser intensity transmitted through the grating lens.

5. The protection device of claim 1, further comprising:

a blocking mechanism, which is arranged on one side of the incident surface of the image pickup device and is arranged in sequence with the exposure mechanism so as to block at least part of light rays emitted into the image pickup device; the blocking mechanism includes:

the second shell is internally provided with a hollow second cavity, and is provided with a through hole communicated with the second cavity, and the through hole is used for light to pass through;

a shut-off element for filtering at least part of the incident light; the shutoff piece is arranged in the second cavity;

and the driving piece is used for driving the shutoff piece to switch between a first position for blocking the through hole and a second position for opening the through hole.

6. The protection device according to claim 5, wherein the shut-off members are provided in a plurality of layers, and each shut-off member is not identical to the laser light filtered by the corresponding shut-off member.

7. The protective apparatus of claim 5, wherein the driving member comprises:

a rotating shaft at least partially disposed within the second cavity;

the rotary disengaging assembly is sleeved on the rotating shaft and is connected with the shutoff piece;

wherein, in the first position, the rotary disengaging assembly is connected with the rotating shaft so as to rotate along with the rotating shaft to drive the shutoff piece to rotate to the second position; in the second position, the rotational decoupling assembly is decoupled from the rotational axis.

8. The protective apparatus of claim 7, wherein the rotational decoupling assembly comprises:

the disengaging piece is sleeved on the rotating shaft and is movably connected with the shutoff piece;

the separating sleeve is sleeved on the rotating shaft and fixed with the second shell, and the separating sleeve is sleeved on the separating piece and is connected with the separating piece in a sliding way;

wherein, in the first position, the disengaging piece is connected with the rotating shaft so as to rotate along with the rotating shaft to drive the shutoff piece to rotate to the second position; during the rotation, the release member moves in the axial direction of the rotation shaft along the release sleeve to release the connection with the rotation shaft at the second position.

9. The protector according to claim 8, wherein the rotating shaft is fixed with a connecting sleeve surrounding the rotating shaft, and the disengaging piece is sleeved on the connecting sleeve and can be connected with and disconnected from the connecting sleeve;

a first connecting piece is arranged on the inner wall of the separation sleeve; the outer surface of the disengaging piece is provided with a second connecting piece connected with the first connecting piece; in the process that the separating piece is connected with the connecting sleeve to rotate along with the rotating shaft, the second connecting piece moves along the first connecting piece to drive the separating piece to move along the axial direction relative to the connecting sleeve until the separating piece is separated from the connecting sleeve;

wherein the first or second connection member extends spirally around an axial direction of the rotation shaft.

10. The protective apparatus of claim 9, wherein the rotational decoupling assembly further comprises:

the elastic piece is sleeved on the rotating shaft and is adjacent to the separating piece, so that restoring force of the separating piece close to the connecting sleeve is provided.

11. The protective device according to claim 8, wherein the shut-off member is sleeved on the rotating shaft, the shut-off member includes a third connecting member disposed along an axial direction of the rotating shaft, the disengaging member includes a fourth connecting member connected to the third connecting member, and the third connecting member and the fourth connecting member are relatively movable therebetween.

12. The protective apparatus of claim 7, wherein the blocking mechanism further comprises:

and the locking piece is used for locking and unlocking the shut-off piece at the second position.

13. The protective apparatus of claim 12, wherein the locking member comprises:

a third housing secured to the second housing, the interior having a third cavity adjacent the second location of the shut-off member;

the electromagnetic assembly is arranged in the third cavity, and one end of the electromagnetic assembly is fixedly connected with the third shell;

the spring is partially sleeved on the electromagnetic assembly;

a projection abutting an end of the spring remote from the electromagnetic assembly, the projection being movable between a position proximate to the electromagnetic assembly and a position at least partially protruding from the third housing; the lug is clamped with the shutoff piece at the second position;

wherein the electromagnetic assembly is capable of securing and releasing the tab to lock and unlock the shutoff.

14. The protective device of claim 12, wherein the blocking mechanism further comprises:

and the reset piece is sleeved on the rotating shaft so as to provide a force for rotating the shut-off piece from the second position to the first position under the condition of unlocking.

15. The protective apparatus of claim 5, wherein the blocking mechanism further comprises:

the spacer is arranged in the second cavity and fixedly arranged with the second shell, and the spacer forms a groove communicated with the through hole; the shut-off member moves within the recess to switch between the first position and the second position;

wherein the spacer is disposed at a distance from the shut-off member.

16. The protective device according to claim 15, wherein a buffer is provided on the spacer, the buffer being adjacent to the shut-off member when the shut-off member is in the first position.

17. The protective apparatus according to any one of claims 1 to 16, further comprising a mounting structure for connecting the exposure mechanism and the image pickup device; the mounting structure includes:

the fixing piece is used for being fixedly connected with the image pick-up device;

the first angle adjusting piece is connected with the fixing piece and the exposure mechanism and is used for adjusting the angle of the exposure mechanism relative to the image pick-up device.

18. The protective apparatus of claim 17, wherein the first angle adjuster comprises:

A linkage assembly having a plurality of relatively rotatable links to adjust the angle.

19. The protective apparatus according to any one of claims 5 to 16, further comprising a mounting structure for connecting the exposure mechanism and the image pickup device and connecting the blocking mechanism and the image pickup device; the exposure mechanism is arranged close to the image pickup device relative to the blocking mechanism and is fixed with the blocking mechanism.

20. The protective apparatus of claim 19, wherein the mounting structure comprises:

the first angle adjusting piece is connected with the fixing piece and the blocking mechanism and is used for adjusting the angles of the blocking mechanism and the exposure mechanism relative to the image pick-up device;

the second angle adjusting piece is fixed on the exposure mechanism and used for adjusting the angles of the blocking mechanism and the exposure mechanism relative to the image pickup device.

21. The protective apparatus of claim 20, wherein the second angle adjuster comprises:

a connecting ring which is abutted against one side of the exposure mechanism, which is close to the image pickup device;

The adjusting support pieces are fixedly connected with the connecting ring and are arranged in a plurality of at intervals along the circumferential direction of the connecting ring so as to form a placing space for placing the camera device;

the adjusting bolt penetrates through the adjusting support piece to the placing space; the adjusting bolt is in threaded connection with the adjusting support piece, and the distance that the adjusting bolt stretches into the placing space is adjusted, so that the angle of the camera device is adjusted.

22. An early warning system for an image pickup apparatus, comprising:

the laser sensing device is used for sensing laser close to the image pickup device and generating a sensing signal;

at least one protection device according to any one of claims 1-21, for activation in a state in which the induction signal is received.