CN107290838B - Lens shielding device and camera device - Google Patents
Lens shielding device and camera device Download PDFInfo
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- CN107290838B CN107290838B CN201710598967.8A CN201710598967A CN107290838B CN 107290838 B CN107290838 B CN 107290838B CN 201710598967 A CN201710598967 A CN 201710598967A CN 107290838 B CN107290838 B CN 107290838B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/045—Lens hoods or shields
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Blocking Light For Cameras (AREA)
Abstract
The invention relates to the technical field of shielding devices of optical lenses, and discloses a lens shielding device and a camera device, wherein the lens shielding device comprises a shielding sheet bracket, a shielding sheet group and a driving device; wherein: the shielding piece bracket is provided with an accommodating space and an opening; the shielding piece group comprises a plurality of shielding pieces which are overlapped inside and outside, and the shielding piece at the outermost layer is arranged on the shielding piece bracket; in every two adjacent shielding sheets, a transmission mechanism is arranged between the shielding sheet on the outer layer and the shielding sheet on the inner layer; the shielding sheet group is provided with an opening station and a closing station; the driving device is arranged on the shielding piece bracket and is in transmission connection with the shielding piece group. The lens shielding device does not need to be powered off when in use, reduces the occupied space of the shielding piece group, and ensures the integrity of the camera lens view field. In addition, the shielding plate is adopted to shield the camera lens, so that the camera lens is protected, the service life of the camera lens can be prolonged, and the operation flow of workers is simplified.
Description
Technical Field
The present invention relates to a shielding device for an optical lens, and more particularly, to a lens shielding device and an image capturing apparatus.
Background
In some monitoring occasions, there are some special time periods that need to shield the monitoring function, and the existing shielding measures are mainly classified into four categories: 1. power down or shut down the device. 2. Manual intervention, the lens is covered with an external barrier. 3. The lens of the camera or the lens part of the camera is rotated to the non-monitoring position. 4. The mechanical mechanism is adopted to horizontally move the lens covering the camera.
For case 1, the device is directly powered off or turned off. The subsequent opening needs to be restarted, and the closing and the opening need to be confirmed at the monitoring terminal, so that the operation is troublesome and the equipment is influenced;
for the 2 nd situation, soft fabrics are generally mostly used, such as cord fabric and the like, to cover the whole equipment, such a covering object needs to fix itself when covering vertical hoisting monitoring, the operation is complicated, the appearance of the covered whole equipment is not coordinated with the environment, more importantly, the covering object can contact with a lens or a spherical cover surface, the covering object is easily dirtied and scratched, and the definition of images at the later stage is influenced;
for case 3, lens rotation, this type often requires sensor blades. The condition that the wiring rotates along with the rotation of the lens can be caused, the risk of winding the wiring is easily caused, the larger reserved space is needed for rotating the lens, and for some equipment with compact internal structure, only a small lens can be adopted, and a large lens cannot be used, so that the imaging quality is directly influenced
For the case 4, a technical manner of translating the cover lens is generally adopted. Since the cover mechanism must be higher than the top of the lens, this approach has a large limitation on the field angle of the lens, and for a lens with a large angle and a wide angle, the moving distance needs to be large to avoid interference with the field angle of the lens. When the used camera lens is a lens with a 180-degree angle of view, the covering mechanism cannot interfere with the angle of view under the state of no covering.
Therefore, it is important to provide a shielding device which is easy and convenient to operate, does not scratch the lens, occupies a small space, and does not interfere with the field angle of the camera lens.
Disclosure of Invention
The invention provides a lens shielding device and a camera device, wherein a retractable shielding sheet group is used as the shielding device to shield a camera lens, so that the physical shielding of equipment can be realized under the condition that the equipment is not powered off, and the requirement is met.
In order to achieve the purpose, the invention provides the following technical scheme:
a lens shielding device comprises a shielding sheet bracket, a shielding sheet group and a driving device; wherein:
the shielding piece bracket is provided with an accommodating space for accommodating the shielding piece group at the opening station; an opening for the lens of the camera to extend out is arranged on the shielding piece bracket;
the shielding piece group comprises a plurality of shielding pieces which are overlapped inside and outside, and the shielding piece at the outermost layer can be rotatably arranged on the shielding piece bracket around a first axis; in every two adjacent shielding sheets, a transmission mechanism is arranged between the outer shielding sheet and the inner shielding sheet so that the inner shielding sheet can be driven by the outer shielding sheet to open and close; the shielding sheet group is provided with an opening station and a closing station, when the shielding sheet group is positioned at the opening station, the shielding sheets are mutually overlapped and are folded into the containing space to avoid the lens of the camera, and when the shielding sheet group is positioned at the closing station, the shielding sheets are sequentially unfolded to form a shielding plate to shield the lens of the camera;
the driving device is installed on the shielding piece bracket and is in transmission connection with the outermost shielding piece in the shielding piece group.
In the lens shielding device, when the shielding sheet group is positioned at the opening station, the shielding sheet group comprising a plurality of shielding sheets which are overlapped inside and outside is arranged in the accommodating space of the shielding sheet bracket so as to avoid the lens of the camera extending out of the opening of the shielding sheet bracket; when the shielding piece group is switched from the opening station to the closing station, the driving device drives the shielding piece positioned on the outermost layer in the shielding piece group in transmission connection with the driving device, the shielding piece positioned on the outermost layer is driven by the driving device to rotate around the first axis relative to the shielding piece bracket, the shielding piece positioned on the outermost layer drives the shielding piece positioned on the inner layer adjacent to the shielding piece to rotate through the transmission mechanism, when the shielding piece positioned on the inner layer in the shielding piece group is in every two adjacent shielding pieces in the shielding pieces which are overlapped inside and outside, the shielding piece positioned on the outer layer is driven by the transmission mechanism arranged between the shielding piece positioned on the inner layer and the shielding piece positioned on the outer layer to perform closing action and expansion, the driving device finishes the operation of switching the shielding piece group from the opening station to the closing station, and each shielding piece is expanded to form a shielding plate to shield the; when the shielding piece group is switched from the closing station to the opening station, the driving device drives the shielding piece positioned on the outermost layer in the shielding piece group in transmission connection with the driving device, the shielding piece positioned on the outermost layer is driven by the driving device to reversely rotate around the first axis relative to the shielding piece support, the shielding piece positioned on the outermost layer drives the shielding piece positioned on the inner layer adjacent to the shielding piece to rotate through the transmission mechanism, when the shielding piece positioned on the inner layer in the shielding piece group is in every two adjacent shielding pieces, the shielding piece positioned on the outer layer is driven by the transmission mechanism arranged between the shielding piece positioned on the outer layer and the shielding piece positioned on the inner layer to open and contract, the driving device completes the operation of switching the shielding piece group from the closing station to the opening station, and the shielding pieces are mutually overlapped and are folded into the containing space to avoid the camera lens. The lens shielding device provided by the invention does not need to be powered off when in use, and the shielding sheet group formed by the plurality of shielding sheets which are overlapped inside and outside when the station is opened is arranged in the accommodating space of the shielding sheet bracket, so that the space occupied by the shielding sheet group is reduced, the integrity of the camera lens field of view is ensured, and the lens shielding device is suitable for camera lenses with various field angles. In addition, the shielding plate formed by the shielding sheets shields the camera lens, so that the camera lens is protected, the service life of the camera lens can be prolonged, the operation flow of workers is simplified, and the control process is simple, convenient and easy to implement.
Therefore, in the lens shielding device, the retractable shielding sheet set is adopted as the shielding device to shield the camera lens, so that the physical shielding of the equipment is realized under the condition that the equipment is not powered off, and the requirement is met.
Further, in the shielding sheet group, in every two adjacent shielding sheets, the shielding sheet of the inner layer is hinged to the shielding sheet of the outer layer through a rotating shaft, and a transmission mechanism between every two adjacent shielding sheets comprises:
the first driving surface and the second driving surface are formed on the shielding sheet of the outer layer and are arranged along a moving path of the shielding sheet of the outer layer from the opening station to the closing station;
the baffle plate on the inner layer is positioned on the first driving surface and the second driving surface, and the baffle plate on the outer layer is positioned on the second driving surface; when the shielding piece on the outer layer moves from the opening station to the closing station, the stop block is matched with the first driving surface to drive the shielding piece on the inner layer to move from the opening station to the closing station; when the shielding piece on the outer layer moves from the closing station to the opening station, the stop block is matched with the second driving surface to drive the shielding piece on the inner layer to move from the closing station to the opening station.
Furthermore, in the shielding sheet group, the axis of the rotating shaft between every two adjacent shielding sheets is coincident with the first axis.
Furthermore, the shielding plate group comprises two shielding plates, the shielding plate at the outer layer is provided with a first notch, and two side edges of the first notch form the first driving surface and the second driving surface; the shielding piece of the inner layer is provided with a limiting rib, and the limiting rib forms the stop block.
Furthermore, a limiting mechanism is formed between the shielding piece on the inner layer and the shielding piece and between the shielding piece support on the outer layer, and is used for limiting the shielding piece on the inner layer when the shielding piece group is positioned at the opening station and the closing station.
Further, stop gear includes:
the first drive face and the second drive face;
a second notch formed on the shielding sheet bracket, wherein a third driving surface and a fourth driving surface are formed on two side edges of the second notch;
the baffle plate of the inner layer is positioned along a moving path from an opening station to a closing station, and the stop block is positioned between the third driving surface and the fourth driving surface; when the shielding piece of the inner layer is positioned at an opening station, a first limiting gap is formed between the second driving surface and the third driving surface, and the stop block on the shielding piece of the inner layer is arranged in the first limiting gap; when the shielding piece of the inner layer is in a closing station, a second limiting gap is formed between the first driving surface and the fourth driving surface, and the stop block on the shielding piece of the inner layer is arranged in the second limiting gap.
Furthermore, the driving device is in transmission connection with the outermost shielding piece in the shielding piece group through a transmission device, and the transmission device comprises a worm in transmission connection with the output end of the driving device and a gear which is arranged on the outermost shielding piece in the shielding piece group and is matched with the worm for use.
Further, the driving device comprises a motor and an in-place feedback device used for judging the position of the shielding plate group, and the in-place feedback device controls the on/off of the driving device by judging the position of the shielding plate group.
Further, the driving device comprises a stepping motor which can carry out on/off operation by calculating the position of the shutter group.
The invention also provides a camera device, which comprises a shell, a lens of a camera arranged on the bottom shell of the shell and the lens shielding device in any one of the technical schemes, wherein the lens of the camera extends out of the shielding sheet bracket from the opening.
Drawings
FIG. 1 is a schematic structural diagram of a lens shielding apparatus according to the present invention;
fig. 2 is a schematic structural diagram of a shielding plate set in the lens shielding device provided by the invention when the shielding plate set is at an opening station;
fig. 3 is a schematic structural diagram of a shielding plate set in a lens shielding device provided by the invention when the shielding plate set is at a closed station;
FIG. 4 is a schematic structural view of an upper limiting mechanism of an outer-layer shielding plate when a shielding plate set in the lens shielding device provided by the invention is at an opening station;
FIG. 5 is an enlarged view of a portion of FIG. 4;
FIG. 6 is a schematic structural view of an upper limiting mechanism of a shielding plate bracket when a shielding plate set in the lens shielding device provided by the invention is at an opening station;
FIG. 7 is an enlarged view of a portion of FIG. 6;
fig. 8a, 8b, and 8c are schematic diagrams of an action process when a shutter set in the lens shielding device provided by the invention is switched from an opening station to a closing station.
Icon: 1-a shielding sheet bracket; 2-a shielding sheet group; 21-an outer layer of shielding sheet; 22-inner layer shielding sheet; 3-a drive device; 4-a first notch; 41-a first drive face; 42-a second drive face; 5-a stop block; 6-a second notch; 61-a third drive face; 62-a fourth drive face; 7-a Hall plate; 8-magnet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present embodiment provides a lens shielding device, which includes a shielding plate bracket 1, a shielding plate set 2 and a driving device 3; wherein:
the shielding piece bracket 1 is provided with an accommodating space for accommodating a shielding piece group 2 at an opening station; an opening for the lens of the camera to extend out is arranged on the shielding piece bracket 1;
the shielding sheet group 2 comprises a plurality of shielding sheets which are overlapped inside and outside, and the shielding sheet 21 at the outermost layer is rotatably arranged on the shielding sheet bracket 1 around a first axis; in every two adjacent shielding sheets, a transmission mechanism is arranged between the outer shielding sheet 21 and the inner shielding sheet 22 so that the inner shielding sheet 22 can be driven by the outer shielding sheet 21 to perform opening and closing actions; with continuing reference to fig. 2 and fig. 3, the shielding sheet set 2 has an opening station and a closing station, when the shielding sheet set 2 is at the opening station, the shielding sheets are stacked and retracted into the accommodating space to avoid the lens of the camera, and when the shielding sheet set 2 is at the closing station, the shielding sheets are sequentially unfolded to form a shielding plate to shield the lens of the camera;
the driving device 3 is installed on the shielding piece bracket 1 and is in transmission connection with the outermost shielding piece 21 in the shielding piece group 2.
In the lens shielding device, referring to fig. 2, when the shielding sheet set 2 is at the opening station, the shielding sheet set 2 including a plurality of shielding sheets stacked inside and outside is placed in the accommodating space of the shielding sheet support 1 to avoid the lens of the camera protruding from the opening of the shielding sheet support 1; when the shielding sheet group 2 is switched from the opening station to the closing station, the driving device 3 drives the shielding sheet 21 at the outermost layer in the shielding sheet group 2 in transmission connection with the driving device, the shielding piece 21 at the outermost layer rotates around the first axis relative to the shielding piece bracket 1 under the driving of the driving device 3, and the shielding piece 21 at the outermost layer drives the shielding piece 22 at the inner layer adjacent to the outermost layer to rotate through the transmission mechanism, when the shielding sheet 21 on the outer layer is driven by the shielding sheet 21 on the inner layer to perform closing action and expand through the transmission mechanism arranged between the shielding sheet 21 on the outer layer and the shielding sheet 22 on the inner layer in every two adjacent shielding sheets of the plurality of shielding sheets stacked inside and outside in the shielding sheet group 2, the driving device 3 completes the operation of driving the shielding sheet group 2 to switch from the opening station to the closing station, please refer to fig. 3, each shielding sheet is unfolded to form a shielding plate to shield the lens of the camera; when the shielding sheet group 2 is switched from the closing station to the opening station, the driving device 3 drives the shielding sheet 21 at the outermost layer in the shielding sheet group 2 in transmission connection with the driving device, the shielding piece 21 at the outermost layer is driven by the driving device 3 to rotate reversely around the first axis relative to the shielding piece bracket 1, and the shielding piece 21 at the outermost layer drives the shielding piece 22 at the inner layer adjacent to the outermost layer to rotate through the transmission mechanism, when the shielding sheet 21 in the outer layer is driven by the shielding sheet 21 in the inner layer to open and contract through the transmission mechanism arranged between the shielding sheet 21 in the outer layer and the shielding sheet 22 in the inner layer in every two adjacent shielding sheets of the plurality of shielding sheets stacked inside and outside in the shielding sheet group 2, the driving device 3 completes the operation of driving the shielding sheet group 2 to be switched from the closing station to the opening station, and the shielding sheets are mutually overlapped and are folded into the accommodating space to avoid the lens of the camera.
The lens shielding device provided by the invention does not need to be powered off when in use, and the shielding sheet group 2 formed by a plurality of shielding sheets which are overlapped inside and outside when the station is opened is arranged in the accommodating space of the shielding sheet bracket 1, so that the space occupied by the shielding sheet group 2 is reduced, the integrity of the camera lens field of view is ensured, and the lens shielding device is suitable for camera lenses with various field angles. In addition, the shielding plate formed by the shielding sheets shields the camera lens, so that the camera lens is protected, the service life of the camera lens can be prolonged, the operation flow of workers is simplified, and the control process is simple, convenient and easy to implement.
Therefore, in the above-mentioned camera lens shelters from the device, in this camera lens shelters from the device, adopt collapsible shielding sheet group 2 as sheltering from the camera lens, be favorable to under the circumstances that equipment does not cut off the power supply, realize that the physics of equipment shelters from to satisfy the demand.
When the monitoring device is used, the lens is covered in a physical mode, so that the effect of shielding a monitoring picture is achieved, the relative position of the lens does not change in the whole process, the photosensitive element does not need to be separated from the mainboard, and the cost is saved. In addition, the mode is convenient for front-end personnel to directly distinguish by naked eyes, and the reliability and the safety are improved.
On the basis of the above technical solution, preferably, referring to fig. 4 and 5, in each two adjacent shielding sheets in the shielding sheet group 2, the inner shielding sheet 22 and the outer shielding sheet 21 are hinged through a rotating shaft, and the transmission mechanism between each two adjacent shielding sheets includes:
the first driving surface 41 and the second driving surface 42 are formed on the shielding piece 21 of the outer layer, and the first driving surface 41 and the second driving surface 42 are arranged along a moving path of the shielding piece 21 of the outer layer from the opening station to the closing station;
a stop block 5 formed on the inner shielding sheet 22, the stop block 5 is positioned between the first driving surface 41 and the second driving surface 42 along the moving path of the outer shielding sheet 21 from the opening station to the closing station; when the shielding piece 21 on the outer layer moves from the opening station to the closing station, the stop block 5 is matched with the first driving surface 41 to drive the shielding piece 22 on the inner layer to move from the opening station to the closing station; when the shielding piece 21 on the outer layer moves from the closing station to the opening station, the stop block 5 is matched with the second driving surface 42 to drive the shielding piece 22 on the inner layer to move from the closing station to the opening station.
Specifically, between each two adjacent shielding sheets: when the outer layer shielding piece 21 moves from the opening station to the closing station, the first driving surface 41 on the outer layer shielding piece 21 pushes the stop block 5 on the inner layer shielding piece 22 to drive the inner layer shielding piece 22 to move from the opening station to the closing station; when the outer shielding piece 21 moves from the closing station to the opening station, the second driving surface 42 on the outer shielding piece 21 reversely pushes the limiting rib on the inner shielding piece 22 to drive the inner shielding piece 22 to move from the closing station to the opening station.
It should be noted that the distance between the first driving surface 41 and the second driving surface 42 is related to the opening angle of the shielding plate 21 of the outer layer relative to the shielding plate 22 of the inner layer when the shielding plate 21 of the outer layer between every two adjacent shielding plates rotates around the first axis, and the distance between the first driving surface 41 and the second driving surface 42 can be set according to the width of the shielding plate along the rotating direction, so that the two adjacent shielding plates completely shield the camera at the closing station, and a shielding gap cannot occur, which causes incomplete shielding.
On the basis of the technical scheme, in the shielding sheet group 2, the axial line of the rotating shaft between every two adjacent shielding sheets is superposed with the first axial line.
Specifically, the structure enables the rotation angle and the path of the plurality of overlapped shielding sheets to be fixed when the plurality of overlapped shielding sheets rotate. When setting up the crooked radian of shielding piece, the position and the protruding degree of camera lens on the separation blade support can be consulted in the settlement of minimum radian to when guaranteeing that every shielding piece rotates around the primary axis, the rotation process avoids the camera lens, can not appear interfering the camera lens and make the camera lens phenomenon of mar appear.
It should be noted that, the above structure enables the shielding sheet group 2 to form protection for the lens of the camera when being in the closed station, thereby ensuring the flatness of the surface of the lens of the camera, making the picture shot by the camera clear, and prolonging the service life of the lens of the camera.
On the basis of the above technical solution, preferably, please refer to fig. 4 again, the shielding sheet set 2 includes two shielding sheets, the shielding sheet 21 of the outer layer is provided with a first notch 4, and two side edges of the first notch 4 form a first driving surface 41 and a second driving surface 42; the shielding piece 22 of the inner layer is provided with a limiting rib which forms a stop block 5.
Specifically, when the shielding piece 21 on the outer layer moves from the opening station to the closing station, the first driving surface 41 pushes the limiting rib to drive the shielding piece 22 on the inner layer to move from the opening station to the closing station; when the shielding piece 21 on the outer layer moves from the closing station to the opening station, the second driving surface 42 pushes the limiting rib in the opposite direction to drive the shielding piece 22 on the inner layer to move from the closing station to the opening station.
It should be noted that, because the actions of the inner shielding plate 22 at the opening station and the closing station are realized by the first driving surface 41 and the second driving surface 42 on the outer shielding plate 21 pushing the limiting rib, the two sides of the first notch 4 on the outer shielding plate 21 form the first driving surface 41 and the second driving surface 42, so that the whole device has good stability in the driving process, the service life of the outer shielding plate is prolonged, and the function failure of the driving surface to the limiting rib under the repeated operation is avoided.
In addition, the structure ensures that the whole device has simple and compact structure, and is convenient for the miniaturization arrangement of the lens shielding device provided by the invention.
On the basis of the above technical solution, preferably, a limiting mechanism is formed between the inner layer shielding piece 22 and the outer layer shielding piece 21 and between the inner layer shielding piece and the shielding piece support 1, and is used for limiting the inner layer shielding piece 22 when the shielding piece group 2 is at the opening station and the closing station.
Specifically, the limiting mechanism determines the accommodating position of the shielding sheet group 2 in the accommodating space of the shielding sheet group 2 when the shielding sheet group 2 is at the opening station, so that the driving device 3 is prevented from driving the outermost shielding sheet 21 to cause extra loss when a plurality of shielding sheets are already overlapped and accommodated in the accommodating space; when the limiting mechanism is used for limiting the position of the shielding plate formed by the shielding plates when the shielding plate group 2 is positioned at the closed station, the shielding plates completely shield the angle of view of the camera.
On the basis of the above technical solution, please refer to fig. 4, fig. 5, fig. 6 and fig. 7, the limiting mechanism includes:
a first driving surface 41 and a second driving surface 42;
a second notch 6 formed on the shielding sheet bracket 1, wherein a third driving surface 61 and a fourth driving surface 62 are formed on two side edges of the second notch 6;
along the path of movement of the shutter 22 of the inner layer from the opening station to the closing station, the stop 5 is located between the third drive surface 61 and the fourth drive surface 62; when the shielding piece 22 of the inner layer is at the opening station, the second driving surface 42 and the third driving surface 61 form a first limit gap, and the stop block 5 on the shielding piece 22 of the inner layer is arranged in the first limit gap; when the inner shielding sheet 22 is in the closing station, the first driving surface 41 and the fourth driving surface 62 form a second limit gap, and the stop block 5 on the inner shielding sheet 22 is placed in the second limit gap.
Specifically, referring to fig. 8a-8c, when the shutter set 2 in fig. 8a is at the opening position, and when the shutter set 2 is switched from the opening position to the closing position, referring to fig. 8b, the driving device 3 is started, first, the driving device 3 drives the outer-layer shutter 21 to rotate around the first axis toward the position of the closing position, the inner-layer shutter 22 is temporarily kept still, that is, with reference to the stopper 5 of the inner-layer shutter 22, the second driving surface 42 on the outer-layer shutter 21 is gradually far from the stopper 5, the first driving protrusion is gradually close to the stopper 5, when the first driving surface 41 is tightly attached to the side of the stopper 5 facing the first driving surface 41, that is, the inner-layer shutter 22 is driven to rotate toward the position of the closing position, and at this time, with reference to the second notch 6 of the shutter bracket 1, the stopper 5 can be found between the third limit protrusion and the fourth limit protrusion, the original rotation from the third limit protrusion to the fourth limit protrusion is slow, and when the rotation is performed to the side of the fourth limit protrusion facing the stop block 5, the stop block 5 of the shielding plate 22 of the inner layer is clamped by the first driving surface 41 of the shielding plate 21 of the outer layer and the fourth driving surface 62 of the shielding plate bracket 1, so that the stop block 5 is located in the second limit gap. At this time, the inner shielding plate 22 reaches the maximum position of the closing station and does not rotate any more, the control driving device 3 is powered off, the outer shielding plate 21 remains stationary, the shielding plate formed by the outer shielding plate 21 and the inner shielding plate 22 remains fixed in the covering state, and the shielding plate group 2 is located at the closing station, please refer to fig. 8 c.
Similarly, when the shutter group 2 is switched from the closing station to the opening station, the driving device 3 is started and rotates in the opposite direction under the state of the above technical solution, firstly the driving device 3 drives the outer-layer shutter 21 to rotate around the first axis to the position where the opening station is located, the inner-layer shutter 22 is temporarily kept still, that is, with reference to the stopper 5 of the inner-layer shutter 22, the second driving surface 42 of the outer-layer shutter 21 gradually approaches the stopper 5, the first driving surface 41 gradually moves away from the stopper 5, and when the second driving surface 42 is tightly attached to the side of the stopper 5 facing the second driving surface 42, that is, the second driving surface drives the inner-layer shutter 22 to rotate towards the position where the opening station is located. At this time, with the second notch 6 of the shield plate holder 1 as a reference, it can be seen that the stopper 5 rotates from the fourth limit protrusion to the third limit protrusion from the original slow speed of immobility between the third limit protrusion and the fourth limit protrusion, when the stopper 5 rotates to the third limit protrusion side, because the stopper 5 of the shield plate 22 of the inner layer is clamped by the second driving surface 42 of the shield plate 21 of the outer layer and the third driving surface 61 of the shield plate holder 1, at this time, the stopper 5 is in the first limit gap, the shield plate 22 of the inner layer does not rotate when reaching the maximum opening and closing position, the driving device 3 is controlled to be powered off, the shield plate 21 of the outer layer remains immobile, the shield plate 22 of the inner layer and the shield plate 21 of the outer layer are overlapped and accommodated in the accommodating space of the shield plate holder 1, and the shield plate group 2 is in the opening position.
On the basis of the above technical scheme, preferably, the driving device 3 is in transmission connection with the outermost shielding piece 21 in the shielding piece group 2 through a transmission device, and the transmission device includes a worm in transmission connection with the output end of the driving device 3 and a gear which is arranged on the outermost shielding piece 21 in the shielding piece group 2 and is used in cooperation with the worm.
It should be noted that, the lens shielding device provided by the present invention preferentially uses the worm wheel and the worm to perform the transmission operation between the driving device 3 and the shielding plate set 2, and fully utilizes the self-locking characteristic of the worm wheel and the worm wheel, so that when the shielding plate set 2 is in the opening station state or the closing station state, the driving device 3 can continuously keep the worm wheel and the worm wheel to keep the relative position between them fixed even if the driving device is powered off, so that the shielding plate in the shielding plate set 2 does not rotate relative to the first axis.
Specifically, when the inner shielding piece 22 reaches the maximum position of the closing station and does not rotate any more, the driving device 3 is powered off, the outer shielding piece 21 is kept still, the shielding plate formed by the outer shielding piece 21 and the inner shielding piece 22 is kept in a covering state and fixed, the worm wheel and the worm are locked, and the shielding piece group 2 is located at the closing station. Similarly, when the inner shielding piece 22 reaches the maximum position of the opening station and does not rotate any more, the worm wheel and the worm are locked, the inner shielding piece 22 and the outer shielding piece 21 are superposed and contained in the containing space of the shielding piece support 1, and the shielding piece group 2 is positioned at the opening station.
On the basis of the technical scheme, the driving device 3 for driving the shielding sheet group 2 has multiple structures, and the specific structure comprises at least one of the following structures:
the structure I is as follows: the driving device 3 comprises a motor and an in-place feedback device for judging the position of the shielding plate group 2, and the in-place feedback device controls the power on/off of the driving device 3 by judging the position of the shielding plate group 2.
Specifically, when the motor rotates forwards and backwards, the rotating direction of the covering sheet group is controlled through the transmission device, and when the covering sheet on the outer layer and the covering sheet on the inner layer rotate and are opened to a specified degree, the complete shielding of the angle of view of the lens is realized, so that the equipment monitoring function is covered; when not needing to shield, the motor reverses when shielding the state relative to shielding piece group 2, and the outer layer of the cover piece and the inner layer of the cover piece rotate to the appointed closed degree, so that the lens is not shielded, and the monitoring function returns to normal.
Preferably, the in-place feedback device is a Hall magnet, a Hall plate 7 in the Hall magnet is arranged on the shielding piece bracket 1, and a magnet 8 is arranged on the shielding piece of the inner layer. When the covering sheet of the inner layer rotates around the first axis, the magnet 8 on the covering sheet of the inner layer also rotates around the first axis, and the Hall plate 7 realizes the in-place detection of the shielding sheet group 2 through position sensing between the Hall plate and the magnet 8.
What need to explain is that this structure has carried out accurate control to the position of sheltering from piece group 2 at opening station and closed station for sheltering from of lens angle of view more accurate when closed station to sheltering from of sheltering from piece group 2, simultaneously when opening the station accurate accomodate in the accommodation space of sheltering from piece support 1, avoid appearing accomodating the phenomenon that incompletely shelters from the lens angle of view.
The invention provides an in-place feedback device in a lens shielding device, which is not limited to a Hall magnet, and can also be an optical coupling alignment device and other devices capable of realizing alignment.
The structure II is as follows: the driving means 3 comprises a stepping motor which can be operated for on/off by calculating the position of the shutter set 2.
Specifically, when the stepping motor rotates forwards and backwards, the rotating direction of the covering sheet group is controlled through the transmission device, and when the covering sheet on the outer layer and the covering sheet on the inner layer rotate and are opened to a specified degree, the complete shielding of the field angle of the lens is realized, so that the covering of the monitoring function of the equipment is realized; when not needing to shield, step motor reverses when shielding state relative to shielding piece group 2, and the outer cover piece of skin and the cover piece of inlayer rotate to appointed closed degree, realize promptly that the monitoring function resumes normally not sheltering from to the camera lens.
It should be noted that, in the whole process, the stepping motor determines the position of the shielding plate group 2 through stepping calculation to perform power on/off control on the whole device. The lens shielding device is simple in structure, the position judgment of the opening station and the closing station of the shielding sheet group 2 is realized only by the function of the motor, other judgment devices are not needed, the miniaturization arrangement of the lens shielding device provided by the invention is facilitated, and the structure of the whole device is compact.
The invention also provides a camera device, which comprises a shell, a lens of the camera arranged on the bottom shell of the shell and the lens shielding device in any one of the technical schemes, wherein the lens of the camera extends out of the shielding piece bracket 1 from the opening.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A lens shielding device is characterized by comprising a shielding piece bracket, a shielding piece group and a driving device; wherein:
the shielding piece bracket is provided with an accommodating space for accommodating the shielding piece group at the opening station; an opening for the lens of the camera to extend out is arranged on the shielding piece bracket;
the shielding piece group comprises two shielding pieces which are overlapped inside and outside, and the shielding piece at the outer layer can be rotatably arranged on the shielding piece bracket around a first axis; a transmission mechanism is arranged between the shielding piece of the outer layer and the shielding piece of the inner layer so that the shielding piece of the inner layer can be driven by the shielding piece of the outer layer to perform opening and closing actions;
the shielding sheet group is provided with an opening station and a closing station, when the shielding sheet group is positioned at the opening station, the two shielding sheets are mutually overlapped and are folded into the containing space to avoid the lens of the camera, and when the shielding sheet group is positioned at the closing station, the two shielding sheets are sequentially unfolded to form a shielding plate to shield the lens of the camera;
the driving device is arranged on the shielding piece bracket and is in transmission connection with the shielding piece on the outer layer in the shielding piece group;
in the shielding sheet group, the shielding sheet on the inner layer is hinged with the shielding sheet on the outer layer through a rotating shaft, and the shielding sheet on the outer layer is provided with a first notch;
the drive mechanism between two shielding pieces includes:
the first driving surface and the second driving surface are formed on two side edges of the first notch, and the first driving surface and the second driving surface are arranged along a moving path of the shielding piece of the outer layer from the opening station to the closing station;
the limiting rib is formed on the shielding piece of the inner layer, the limiting rib is positioned between the first driving surface and the second driving surface along a moving path of the shielding piece of the outer layer from the opening station to the closing station; when the shielding piece on the outer layer moves from the opening station to the closing station, the limiting rib is matched with the first driving surface to drive the shielding piece on the inner layer to move from the opening station to the closing station; when the outer shielding piece moves from the closing station to the opening station, the limiting rib is matched with the second driving surface to drive the inner shielding piece to move from the closing station to the opening station.
2. The lens shielding device according to claim 1, wherein an axis of the rotating shaft between two shielding plates in the shielding plate group coincides with the first axis.
3. The lens shielding device according to claim 1, wherein a limiting mechanism is formed between the inner shielding plate and the outer shielding plate and between the inner shielding plate and the outer shielding plate support, and is used for limiting the inner shielding plate when the shielding plate set is in the opening station and the closing station.
4. The lens barrier apparatus according to claim 3, wherein the position limiting mechanism comprises:
the first drive face and the second drive face;
a second notch formed on the shielding sheet bracket, wherein a third driving surface and a fourth driving surface are formed on two side edges of the second notch;
the limiting rib is positioned between the third driving surface and the fourth driving surface; when the shielding piece of the inner layer is positioned at an opening station, a first limiting gap is formed between the second driving surface and the third driving surface, and a limiting rib on the shielding piece of the inner layer is arranged in the first limiting gap; when the shielding piece of the inner layer is in a closing station, a second limiting gap is formed between the first driving surface and the fourth driving surface, and the stop block on the shielding piece of the inner layer is arranged in the second limiting gap.
5. The lens shielding device according to any one of claims 1 to 4, wherein the driving device is in transmission connection with the outermost shielding plate in the shielding plate group through a transmission device, and the transmission device includes a worm in transmission connection with an output end of the driving device and a gear disposed on the outermost shielding plate in the shielding plate group and used in cooperation with the worm.
6. The lens shielding device according to claim 5, wherein the driving device comprises a motor and an in-position feedback device for determining the position of the shielding plate group, and the in-position feedback device controls the power on/off of the driving device by determining the position of the shielding plate group.
7. The lens barrier apparatus according to claim 5, wherein the driving means includes a stepping motor operable to perform an on/off operation by calculating the position of the barrier sheet group.
8. A camera device is characterized by comprising a shell, a lens of a camera arranged on the bottom shell of the shell, and the lens shielding device as claimed in any one of claims 1 to 7, wherein the lens of the camera extends out of the shielding sheet bracket from the opening.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710598967.8A CN107290838B (en) | 2017-07-21 | 2017-07-21 | Lens shielding device and camera device |
| PCT/CN2018/093678 WO2019015464A1 (en) | 2017-07-21 | 2018-06-29 | Systems and methods for blocking a target in video monitoring |
| EP18834378.4A EP3639089B1 (en) | 2017-07-21 | 2018-06-29 | Systems and methods for blocking a target in video monitoring |
| US16/746,955 US11438491B2 (en) | 2017-07-21 | 2020-01-19 | Systems and methods for blocking a target in video monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710598967.8A CN107290838B (en) | 2017-07-21 | 2017-07-21 | Lens shielding device and camera device |
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| Publication Number | Publication Date |
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| CN107290838A CN107290838A (en) | 2017-10-24 |
| CN107290838B true CN107290838B (en) | 2021-02-26 |
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| CN201710598967.8A Active CN107290838B (en) | 2017-07-21 | 2017-07-21 | Lens shielding device and camera device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3639089B1 (en) | 2017-07-21 | 2023-09-06 | Zhejiang Dahua Technology Co., Ltd. | Systems and methods for blocking a target in video monitoring |
| CN108762150A (en) * | 2018-06-04 | 2018-11-06 | 深圳市沃特沃德股份有限公司 | Skull control assembly and skull control method |
| CN108648390A (en) * | 2018-07-11 | 2018-10-12 | 广东合正网络技术有限公司 | The adjustable dual technology detector of setting angle and corresponding installation method |
| CN108613745A (en) * | 2018-07-11 | 2018-10-02 | 广东合正网络技术有限公司 | The adjustable infrared detector of setting angle and corresponding installation method |
| CN108833765B (en) * | 2018-09-12 | 2024-02-06 | 歌尔科技有限公司 | Wear display device, camera module and camera lens shielding assembly thereof |
| CN110381241B (en) * | 2019-07-26 | 2021-02-09 | 维沃移动通信有限公司 | Camera module, mobile terminal and control method thereof |
| CN110913109B (en) * | 2019-12-09 | 2021-06-04 | 歌尔科技有限公司 | Camera shielding mechanism and electronic product |
| CN114730064A (en) * | 2020-07-15 | 2022-07-08 | 核心光电有限公司 | Viewpoint aberration correction for scanning folded cameras |
| TWI732634B (en) * | 2020-07-24 | 2021-07-01 | 和碩聯合科技股份有限公司 | Camera protection device |
| CN112135027B (en) * | 2020-09-24 | 2021-12-28 | 广西电网有限责任公司 | Can accomodate formula hidden security protection covering device |
| CN113873181B (en) * | 2021-09-15 | 2024-04-09 | 浙江华感科技有限公司 | Baffle control system, method and device and thermal imaging camera |
| CN114268725B (en) * | 2021-12-29 | 2023-08-08 | 广州朗国电子科技股份有限公司 | Camera privacy cover opening and closing mechanism and method |
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| CN102226865A (en) * | 2011-06-13 | 2011-10-26 | 中国气象科学研究院 | Shielding device for full-view lens |
| CN102645817A (en) * | 2012-05-08 | 2012-08-22 | 中国气象科学研究院 | Hemispherical opening-closing lens shielding device based on gear structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102226865A (en) * | 2011-06-13 | 2011-10-26 | 中国气象科学研究院 | Shielding device for full-view lens |
| CN102645817A (en) * | 2012-05-08 | 2012-08-22 | 中国气象科学研究院 | Hemispherical opening-closing lens shielding device based on gear structure |
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