CN210609417U

CN210609417U - Camera dustproof protective cover

Info

Publication number: CN210609417U
Application number: CN201922450411.1U
Authority: CN
Inventors: 陈啟谦; 曹烈; 田恒垛; 游子雄
Original assignee: Masteel Design & Research Institute Co ltd
Current assignee: Masteel Design & Research Institute Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-22
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a camera safety cover that prevents dust belongs to surveillance camera machine protection field. It comprises a shell and a fan cover; the fan cover is arranged at the front end of the shell; the fan cover is internally provided with an air cavity with two open ends, and the front end of the air cavity is provided with an air outlet with an annular opening; when the fan cover works in a ventilating mode, airflow blown out of the air outlet forms a conical annular air curtain. The utility model discloses a camera dustproof safety cover is provided with the dustproof construction of blowing alone in the position that is independent of the camera, can form seamless conical ring shape air curtain before the camera lens to cut off camera lens and outside air, can effectively prevent the dust to flow into the protective mirror face of camera.

Description

Camera dustproof protective cover

Technical Field

The utility model belongs to surveillance camera machine protection field, more specifically say, relate to a camera machine safety cover that prevents dust.

Background

At present, in industrial production, a plurality of devices need to use a camera to monitor the operation state, but under the normal condition, the environment of an industrial production site is severe, the service life of the camera is relatively low, and therefore the camera needs to be cleaned or replaced regularly. In order to protect the camera and prolong the service life of the camera, a protective cover is generally arranged outside the camera to protect the camera.

However, in some industrial production sites with severe environment, for example, places with much dust and oil mist, the protection effect of the existing camera protection cover is not obvious, which easily causes that much dust or oil stain is attached to the protection mirror surface of the camera, and the lens needs to be periodically cleaned or replaced, thus the operation is complicated.

To the above-mentioned problem that current protection casing is dustproof effect not good under the more industrial production environment of dust, chinese patent application, the application number is: CN201720185145.2, published date: a patent of 2017, 10 and 27, discloses a pan-tilt camera with an air-cooled protective cover, which comprises an electric pan-tilt, a protective cover connected to the electric pan-tilt and a camera fixed in the protective cover through a bracket; the rear side of the protective cover is provided with an air inlet, and the front side wall of the protective cover is provided with a plurality of vent holes; the included angle between the axis at the outlet of the vent hole and the front side wall of the protective cover is less than 90 degrees; the axes of the vent holes are intersected, and the axial intersection point of the vent holes is on the axis of the shield. The disadvantages of this solution are: on the one hand, the camera and the compressed gas are in the same cavity, and when the compressed gas is introduced, water vapor and impurities in the compressed gas can be attached to the lens of the camera to pollute the lens of the camera and cause unclear shooting. On the other hand, compressed gas is discharged from a small hole formed in the protective lens in front of the camera, and can generate an air suction phenomenon at the moment of air on-off, and can suck external dust into the protective cover through the air hole, so that the lens is further polluted, and therefore, the dustproof effect of the device is relatively poor.

In view of the problem that the camera and the compressed gas are in the same cavity and can pollute the lens of the camera, some solutions consider the problem, for example, chinese patent application, application number: 201410467528.X, published as: the invention patent of 12 months and 10 days in 2014 discloses an air-cooled protective cover, which comprises: a protection section of thick bamboo, lens cap and support base, lens cap and back lid are installed respectively to the terminal surface of a protection section of thick bamboo, the lens cap is connected through the screw with a protection section of thick bamboo, back lid welding is in the terminal surface of a protection section of thick bamboo, a protection section of thick bamboo is connected with the support base, the support base comprises bottom plate and regulating plate cooperation. The disadvantages of this solution are: ventilate in the protective barrel, can play the effect of inside and outside isolation, make the camera can work under high temperature environment, but this device does not play dustproof effect, and consequently the dust can adhere on the protective glass piece on the lens hood, causes the camera to make a video recording unclear.

Disclosure of Invention

1. Problems to be solved

Only play thermal-insulated effect to above-mentioned protection casing, do not play dustproof effect or camera and compressed gas are in same cavity, cause the unsharp problem of making a video recording, the utility model provides a camera safety cover that prevents dust. The utility model discloses a camera dustproof safety cover is provided with the dustproof construction of blowing alone in the position that is independent of the camera, can form seamless conical ring shape air curtain before the camera lens to cut off camera lens and outside air, can effectively prevent the dust to flow into the protective mirror face of camera.

Additionally, the utility model discloses a dustproof safety cover not only can play dirt-proof effect, and the protection camera lens does not receive the dust pollution, can use for a long time, but also can play certain thermal-insulated effect, is applicable to occasions such as high temperature.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A camera dustproof protection cover comprises a shell and a fan cover; the fan cover is arranged at the front end of the shell; the fan cover is internally provided with an air cavity with two open ends, and the front end of the air cavity is provided with an air outlet with an annular opening; when the fan cover works in a ventilating mode, airflow blown out of the air outlet forms a conical annular air curtain.

Furthermore, the fan housing comprises a fan housing outer wall and a fan housing inner wall, wherein an air cavity is formed between the fan housing outer wall and the fan housing inner wall and is supported by a plurality of fixing pieces distributed along the circumferential direction.

Furthermore, the air gap of the annular air outlet is 0.5-1 mm, and the cone angle α of the conical annular air curtain formed by blowing air is 24-46 degrees.

Furthermore, the air cavity between the outer wall of the air hood and the inner wall of the air hood is gradually reduced at a position close to the air outlet along the air blowing direction.

Further, the housing comprises inner and outer housings; an air channel with an air outlet at the front end is formed between the inner shell and the outer shell, and an air inlet communicated with the air channel is formed in the outer shell; and the rear end opening of the fan cover is communicated with the air outlet at the front end of the shell in a sealing manner.

Furthermore, the front end of the shell is provided with an annular boss, and the annular boss is inserted into the air cavity at the rear end of the air cover and is connected with the air cavity through threads.

Furthermore, the front end surfaces of the inner and outer shells are respectively connected with the rear end surfaces of the inner and outer walls of the fan cover in a sealing manner through a sealing ring.

Furthermore, a flange plate is arranged on the outer wall of the rear end of the fan cover, and is connected with the front end of the outer shell through bolts and compresses the sealing ring.

Further, a protective lens is mounted in the interior cavity at the front end of the housing.

Furthermore, a detachable rear cover is installed at the rear end of the shell, and a wire inlet is formed in the rear cover.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a camera safety cover that prevents dust, compressed gas are through the gas passage circulation between the inside and outside casing to blow out and can keep great gas at the air outlet department of fan housing strong, form seamless conical ring shape air curtain, can prevent that the dust from flowing into in the protection casing, reach dirt-proof purpose.

(2) The utility model discloses a camera dustproof safety cover, the angle between the fan housing inside and outside wall can be adjusted, and then can adjust the cone angle of the conical ring shape air curtain that blows off from air outlet department, and the stationary blade that sets up between the inside and outside wall of fan housing can play a fixed effect of support to the stationary blade has from the function of locating, can realize the supporting role in the wind chamber between the fan housing inside and outside wall automatic jam.

(3) The utility model discloses a camera safety cover that prevents dust, because casing and wind cap are difficult an organic whole to be made, consequently the utility model discloses a what casing and wind cap adopted is detachable connection, the equipment of being convenient for. In addition, once the problem of damage of the protective lens occurs, the fan cover can be detached from the shell, the protective lens is replaced independently instead of the whole protective cover, and the cost is saved; in addition, when dust is attached to the protective lenses, the fan cover can be detached to perform manual wiping to clean the protective lenses, and the operation is simple and easy.

(4) The utility model discloses a camera dustproof protection cover, casing and wind shield adopt bolt and screw thread dual fixed connection, make the structure more stable, can prevent that compressed gas from in the gas-jetting process, the not hard up condition of wind shield that produces because of the vibration, lead to compressed gas to get into in the protection cover through the not hard up gap, pollute the protection lens; meanwhile, an annular sealing ring is arranged between the shell and the fan cover for sealing, so that the problem that compressed gas is blown out from a connecting gap to pollute the protective lens when the protective cover is not loosened can be prevented, and the problem that the compressed gas is blown out from the gap to pollute the protective lens due to the fact that the air cover is loosened to cause reduction of sealing performance can be prevented.

Drawings

FIG. 1 is a schematic structural view of a housing of a dust-proof shield of the present invention;

fig. 2 is a schematic structural view of the dustproof protection cover fan housing of the present invention;

fig. 3 is a left side view of the dust-proof protection cover of the present invention;

fig. 4 is the overall structure schematic diagram of the dustproof protection cover of the present invention.

1. A housing; 2. a fan housing; 21. the outer wall of the fan housing; 22. the inner wall of the fan cover; 23. a fixing sheet; 3. an air outlet; 4. a seal ring; 5. a protective lens; 6. an air inlet; 7. a wire inlet; 8. a rear cover; 9. a flange plate.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

The dustproof protection cover to current camera only plays thermal-insulated effect, does not play dustproof effect or the camera is in same cavity with compressed gas, causes this problem of making a video recording unclear, and this embodiment provides a camera dustproof protection cover, on the basis of current camera protection cover, has carried out corresponding improvement, combines fig. 1, fig. 2 and fig. 4 to show, and its concrete structure is as follows:

the dustproof protection cover of the embodiment comprises a shell 1 and a fan cover 2, wherein a detachable rear cover 8 is arranged at the rear end of the shell 1, and a wire inlet 7 is formed in the rear cover 8; the front end of the shell 1 is provided with the protective lens 5, the protective lens 5 is arranged on the shell 1 through the stainless steel fixing ring, the protective lens 5 cannot influence the definition of the camera, the camera is placed in a closed inner cavity formed by the shell 1, the rear cover 8 and the protective lens 5 in a surrounding mode, and the camera is protected from being polluted by on-site dust. And be equipped with sealing washer 4 between back lid 8 and the casing 1, can strengthen the sealing performance of device, prevent that external gas from getting into in the casing 1 inner chamber from the gap between back lid 8 and the casing 1, polluting the camera lens. Wherein, fan housing 2 installs the front end at casing 1, fan housing 2 includes fan housing inner wall 22 and fan housing outer wall 21, and the cavity that forms between the interior outer wall of fan housing 2 is the wind chamber, and the rear end of fan housing 2 is equipped with the air inlet, and the front end is equipped with air outlet 3, blows off the air curtain from air outlet 3, prevents dust.

Because it is inconvenient to directly introduce compressed gas into the fan housing 2 and the dustproof effect is not good, the shell 1 is designed into a double-layer stainless steel structure and comprises an inner shell and an outer shell, a channel formed between the inner shell and the outer shell is a gas channel, and the gas channel is communicated with a wind cavity of the fan housing 2; the outer shell is provided with an air inlet 6 communicated with the air channel, and compressed air flows into the air channel from the air inlet 6, flows into the air cavity through the air channel and is blown out from the air outlet 3.

Particularly, the wind shield 2 is in the form of a combination of an inner wind shield wall and an outer wind shield wall, a plurality of fixing pieces 23 for supporting are arranged between the inner wall and the outer wall of the wind shield 2 along the circumferential direction, and the air outlet end is in a conical shape, so that the gap of the air cavity between the outer wind shield wall 21 and the inner wind shield wall 22 is gradually reduced near the air outlet 3 and along the blowing direction of the compressed air. The air outlet 3 of 2 front ends of fan housing is annular, consequently, can form seamless conical ring shape wind curtain in air outlet 3 department, guarantees to keep apart outside air and protective glass piece 5, and dustproof effect is better. In this embodiment, the pressure of the compressed gas is 0.2-0.6 MPa, and the air volume is 2-5 m³H, through a plurality of tests on the air strength and the protection range of the conical annular air curtain formed at the air outlet 3, the air gap at the air outlet 3 is set to be 0.5-1 mm, preferably 0.8mm in the embodiment, and the size of the air gap can ensure that air can keep relatively large air pressure when compressed air is blown out from the air outlet 3 through the air cavity, so that a seamless conical annular air curtain with certain pressure intensity can be formed in front of a camera lens, dust can be prevented from flowing into the protective cover, and the purpose of dust prevention is achieved.

The structure of the wind shield 2 is shown in fig. 2 and 3, and the cone angle of the conical annular wind curtain formed at the wind outlet 3 is changed along with the change of the angle between the wind shield inner wall 22 and the wind shield outer wall 21. The angle between the hood inner wall 22 and the hood outer wall 21 is different, and the position of the fixing piece 23 disposed between the hood inner wall 22 and the hood outer wall 21 is different accordingly. The fixing plate 23 can be tightly plugged in the air cavity between the inner wall and the outer wall of the fan housing 2 to realize the supporting function, so that the supporting function of the fixing plate 23 is realized through the self-positioning function of the fixing plate.

In the actual processing process, because the shell 1 and the fan housing 2 are difficult to be integrally manufactured, the shell 1 and the fan housing 2 are manufactured separately for the convenience of processing and actual use. In particular, the front ends of the inner and outer cases are bent inward to form a ring-shaped boss structure, which is liable to be deformed during long-term use due to the instability of the hollow structure between the inner and outer walls of the boss, thus resulting in deterioration of the sealing performance of the device, and therefore, a fixing piece 23 for supporting is provided therein. Based on the consideration of convenient processing, the fixing sheet 23 in the boss and the fixing sheet 23 in the wind cavity of the wind cover 2 can be integrally manufactured, and plays a role of fixing and supporting the cavity.

Dustproof safety cover is in order to prevent that substances such as dust in the outside air from entering into the protection casing inner chamber and polluting the camera lens, and the cone ring shape air curtain in this embodiment can keep apart protective glass piece 5 with the outside air, protects protective glass piece 5 not polluted by the dust, and protective glass piece 5 keeps apart camera and outside air again, has protected the camera lens, and dustproof effect further strengthens. Therefore, even if air leakage occurs between the shell 1 and the fan housing 2, substances such as dust and the like can only adhere to the protective lens 5 and cannot enter the inner cavity of the shell 1 to pollute the lens of the camera, and the camera shooting effect is not affected. Because the shell 1 and the fan housing 2 are separately manufactured, when dust is attached to the protective lens 5, the fan housing 2 can be detached for manual wiping to clean the protective lens 5, and the operation is simple and easy; when the problem of damage takes place for protective glass 5, also can dismantle fan housing 2 from casing 1, change protective glass 5 alone, rather than changing whole protection casing, practice thrift the cost.

Furthermore, because the fan housing 2 is installed at the front end of the housing 1, and the housing 1 and the fan housing 2 are separately manufactured, the housing 1 and the fan housing 2 need to be connected in a sealing manner, and because the compressed gas has a wind pressure, the fan housing 2 vibrates during the blowing process, and if the device is used for a long time, the fan housing 2 and the housing 1 may become loose, and even the fan housing 2 may fall off from the housing 1, and further the sealing performance of the device may be deteriorated, and the sealing performance of the device may be deteriorated, so that the pressure of the conical annular air curtain blown out from the air outlet 3 of the fan housing 2 may be lowered, and finally the dustproof effect of the device may be deteriorated. Therefore, the stability between the casing 1 and the wind shield 2 needs to be enhanced to enhance the sealing performance of the device, and the connection mode is as follows:

one of the connection modes is as follows: the annular boss is inserted into the air cavity at the rear end of the fan housing 2 and is in threaded connection, and the threaded connection has multiple modes, for example, the first mode is that an external thread is arranged on the outer side of the outer wall of the boss, correspondingly, an internal thread matched with the external thread is arranged on the inner side of the outer wall at the rear end of the fan housing 2, and the external thread and the internal thread are in threaded connection; the second mode is that an external thread is arranged on the outer side of the inner wall of the boss, correspondingly, an internal thread matched with the external thread is arranged on the inner side of the inner wall of the rear end of the fan cover 2, and the external thread and the internal thread are in threaded connection; the third mode combines the former two modes, is provided with the external screw thread simultaneously in the outside of boss inside and outside wall, and correspondingly, is provided with the internal thread with external screw thread assorted in the inboard of the inside and outside wall of fan housing 2 rear end, both threaded connection. The other connection mode is as follows: the outer wall of the rear end of the fan housing 2 is provided with a flange 9, the front end of the shell 1 is provided with small holes which correspond to the mounting holes in the flange 9 one by one, and the flange 9 is connected with the front end of the shell 1 through bolts. However, when these two connection methods are used alone, the stability is not high, and therefore, during the blowing process of the compressed gas, the vibration generated by the wind shield 2 still causes the housing 1 and the wind shield 2 to become loose or the wind shield 2 falls off from the housing 1, and further causes the sealing property between the two to be poor, and the blowing strength at the air outlet 3 is reduced, and the dustproof effect cannot be achieved. Therefore, the two methods need to be combined to enhance the stability of the device and further enhance the sealing performance of the device.

In order to further strengthen the sealing performance of the device, the front end face of the inner and outer shells is respectively sealed with the rear end face of the inner wall and the outer wall of the fan cover 2 through the sealing ring 4, so that the situation that when the shell 1 and the fan cover 2 are loosened, outside air or compressed gas enters the protective cover along with gaps, the camera lens is polluted, and the shooting definition is influenced is prevented. The connecting mode of the double fixed connection of the bolt and the thread is adopted, so that the stability of the device can be enhanced, the sealing ring 4 arranged between the bolt and the thread can be further pressed, and better sealing is realized. Meanwhile, the sealing ring 4 is arranged between the joint of the shell 1 and the fan cover 2 for sealing, so that the problem that the camera lens is polluted by compressed gas blown out from a connecting gap when the protective cover is not loosened can be prevented, meanwhile, the problem that the camera lens is polluted by outside air and compressed gas due to the fact that the sealing performance is reduced because the fan cover 2 is loosened can be prevented, and the reliability of the device is greatly enhanced.

Example 2

The camera dustproof protection cover in embodiment 1 not only can play dustproof effect, protects the camera lens from dust pollution, can be used for a long time, but also can play a certain heat insulation role. However, the heat insulation effect is limited, and the camera dust-proof protection cover in the embodiment cannot be used in a high-temperature environment, so the camera dust-proof protection cover in the embodiment is correspondingly improved on the basis of the embodiment 1:

the dust shield casing 1 in this embodiment sets up to three-layer stainless steel structure, forms two passageways and an inner chamber, and the camera is placed in the inner chamber, and two-layer passageway keeps apart the camera with the external world, and thermal-insulated effect is better relatively. The two channels are respectively a cooling water channel and a gas channel, the cooling water channel is arranged on the outermost layer, and cooling water is introduced into the cooling water channel and used for absorbing heat in the environment, so that the camera can still work in a high-temperature environment; the channel between inner chamber and the cooling water passageway is the gas passage, lets in compressed gas in it, forms the conical ring shape wind curtain at air outlet 3 for it is dustproof, makes the camera can be applied to in the environment of high dust.

Therefore, the camera dustproof protection cover in the embodiment can not only enable the camera to be applied to the high-dust industrial environment, but also be applicable to high-temperature occasions.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims

1. A dust-proof protection cover for a camera comprises a shell (1); the method is characterized in that: also comprises a fan cover (2); the fan cover (2) is arranged at the front end of the shell (1); the fan cover (2) is internally provided with an air cavity with two open ends, and the front end of the air cavity is provided with an air outlet (3) with an annular opening; when the fan cover (2) is used for ventilation, airflow blown out from the air outlet (3) forms a conical annular air curtain.

2. The dust-proof cover for camera of claim 1, wherein: the fan housing (2) comprises a fan housing outer wall (21) and a fan housing inner wall (22), wherein an air cavity is formed between the fan housing outer wall (21) and the fan housing inner wall (22) and is supported by a plurality of fixing pieces (23) distributed along the circumferential direction.

3. The dustproof protective cover for the camera according to claim 2, wherein the air gap of the annular air outlet (3) is 0.5-1 mm, and the cone angle α of the cone-shaped annular air curtain formed by blowing air is 24-46 degrees.

4. A camera dust cover according to claim 3, wherein: and the air cavity between the outer wall (21) of the air hood and the inner wall (22) of the air hood is gradually reduced along the air blowing direction at the position close to the air outlet (3).

5. A camera dust cover according to any one of claims 1 to 4, wherein: the shell (1) comprises an inner shell and an outer shell; an air channel with an air outlet at the front end is formed between the inner shell and the outer shell, and an air inlet (6) communicated with the air channel is arranged on the outer shell; the rear end opening of the fan cover (2) is communicated with the front end air outlet of the shell (1) in a sealing mode.

6. The dust-proof cover for camera of claim 5, wherein: the front end of the shell (1) is provided with an annular boss, and the annular boss is inserted into the air cavity at the rear end of the air cover (2) and is connected with the air cavity through threads.

7. The dust-proof cover for camera of claim 6, wherein: the front end surfaces of the inner shell and the outer shell are respectively connected with the rear end surfaces of the inner wall and the outer wall of the fan cover (2) in a sealing mode through a sealing ring (4).

8. The dust-proof cover for camera of claim 7, wherein: set up ring flange (9) on fan housing (2) rear end outer wall, ring flange (9) with shell body front end bolted connection to compress tightly sealing washer (4).

9. A camera dust cover according to any one of claims 1 to 4, wherein: and a protective lens (5) is arranged in the inner cavity at the front end of the shell (1).

10. A camera dust cover according to any one of claims 1 to 4, wherein: the rear end of the shell (1) is provided with a detachable rear cover (8), and the rear cover (8) is provided with a wire inlet (7).