CN218775300U

CN218775300U - Camera head

Info

Publication number: CN218775300U
Application number: CN202223242215.3U
Authority: CN
Inventors: 仰宗春
Original assignee: Hangzhou Micro Image Software Co ltd
Current assignee: Hangzhou Micro Image Software Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-03-31
Anticipated expiration: 2032-12-01

Abstract

The application discloses a camera, a lens is arranged in a shell, a light-transmitting baffle plate component and an end cover are both fixed on the shell, the light-transmitting baffle plate component is positioned on the light inlet side of the lens, the end cover is positioned on the side, away from the lens, of the light-transmitting baffle plate component, and the end cover is an annular structural member to avoid a visual field area of the light-transmitting baffle plate component; the surface of the light-transmitting baffle plate component and the surface of the end cover are clamped to form a purging gap, the inner side of the ring of the end cover is communicated with air supply equipment through the purging gap, the surface of one side, facing the light-transmitting baffle plate component, of the end cover comprises a drainage wall, the drainage wall is used for guiding air to flow along the surface of the drainage wall so as to purge a view field area of the light-transmitting baffle plate component, an included angle formed by a tangent line of a wall surface, communicated with the inner side of the ring of the end cover, of the drainage wall and the radial direction of a lens is an outlet angle alpha, and alpha is larger than 0 degree and smaller than 90 degrees. The cleaning process of this camera need not to consume the human cost almost, and at the in-process of the printing opacity separation blade subassembly of clean camera, can not produce the hindrance to the normal work of camera hardly.

Description

Camera head

Technical Field

The application relates to the technical field of camera modules, in particular to a camera.

Background

In order to ensure safe production, monitoring equipment such as cameras are arranged on production vehicles or raw material fields. For a dust-free workshop, the camera can usually keep good cleanliness, but for production environments such as a mine factory, a steel factory or a cement factory, dust is easily accumulated on a view finding window of the camera, so that the camera cannot work normally. At present, a camera is usually cleaned by wiping with a cleaning cloth or washing with water, but the frequent wiping with the cleaning cloth causes a problem of great waste of labor cost, and the washing with water causes a problem of hindering the imaging process of the camera.

SUMMERY OF THE UTILITY MODEL

The application discloses camera, the cleaning process of this camera need not to consume the human cost almost, and at the in-process of the printing opacity separation blade subassembly of clean camera, can not produce the hindrance to the normal work of camera hardly.

In order to solve the above problems, the following technical solutions are adopted in the present application:

the application discloses a camera which is characterized by comprising a shell, a lens, a light-transmitting baffle plate assembly and an end cover, wherein the lens is installed in the shell, the light-transmitting baffle plate assembly and the end cover are fixed on the shell, the light-transmitting baffle plate assembly is positioned on the light inlet side of the lens, the end cover is positioned on one side, deviating from the lens, of the light-transmitting baffle plate assembly, and the end cover is an annular structural member so as to avoid a visual field area of the light-transmitting baffle plate assembly;

the surface of the light-transmitting baffle plate assembly and the surface of the end cover are clamped to form a purging gap, the inner side of the ring of the end cover is configured to be communicated with air supply equipment through the purging gap, the surface of one side, facing the light-transmitting baffle plate assembly, of the end cover comprises a drainage wall, the drainage wall is used for guiding air to flow along the surface of the drainage wall so as to purge the visual field area of the light-transmitting baffle plate assembly, an included angle formed between a tangent line of a wall surface, communicated with the inner side of the ring of the end cover, of the drainage wall and the radial direction of the lens is an outlet angle alpha, and alpha is larger than 0 degree and smaller than 90 degrees

The technical scheme who this application adopted can reach following beneficial effect:

the embodiment of the application discloses a camera, its camera lens is installed in the casing, and the income light side of camera lens is equipped with printing opacity separation blade subassembly, for the camera lens provides the effect dustproof and that shelter from debris. One side that the printing opacity separation blade subassembly deviates from the camera lens is equipped with the end cover, and the end cover is the annular structure to dodge the field of vision region of printing opacity separation blade subassembly, prevent that the end cover from hindering the process of finding a view of camera lens. A purging gap is formed between the surface of the end cover and the surface of the light-transmitting baffle plate assembly and is communicated with the air supply equipment; simultaneously, the end cover is equipped with the drainage wall towards one side of printing opacity separation blade subassembly to, the tangent line of the wall of the intra-annular side intercommunication of drainage wall and end cover and the radial contained angle between the camera lens are outlet angle alpha, through making 0 ≦ alpha ≦ 90, make the drainage wall can provide the guide effect for gas, make gas flow along the surface of drainage wall, and sweep the field of vision region to printing opacity separation blade subassembly, thereby prevent that impurity such as dust from attaching deposition on the surface of printing opacity separation blade subassembly.

When adopting above-mentioned technical scheme to solve the dust removal problem of printing opacity separation blade subassembly in the camera, need not hardly to consume the human cost, and clean efficiency and clean effect homogeneous phase are relatively better to, at the in-process of the printing opacity separation blade subassembly of clean camera, can hardly produce the hindrance to the normal work of camera.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a camera disclosed in an embodiment of the present application;

fig. 2 is an enlarged schematic view of a partial structure of a camera disclosed in an embodiment of the present application.

Description of the reference numerals:

11-purging gap, 12-communicating cavity, 13-air inlet,

110-shell body, 120-rear cover, 130-lower gland,

210-lens, 220-mounting seat,

300-a light-transmitting baffle plate,

400-an upper gland, 410-a second avoiding surface,

500-end cover, 510-drainage groove, 511-drainage wall, 512-forming wall, 520-first avoiding surface,

600-elastic sealing sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the embodiment of the present application discloses a camera, which includes a housing, a lens 210, a light-transmitting baffle assembly and an end cap 500, and of course, the camera may further include other structural members such as a circuit board and a mounting base 220, which are not listed here for brevity. In addition, the transparent barrier plate assembly may be a single component, in order to reduce the assembly difficulty of the entire camera, in other embodiments of the present application, the transparent barrier plate assembly may include multiple components, specifically, the transparent barrier plate assembly may include a transparent barrier plate 300 and an upper cover 400, which are separable from each other, and for convenience of description, the foregoing combination structure is adopted as an example with the transparent barrier plate assembly in the following.

The housing is a main structure of the camera, and may be formed of a hard material such as plastic or metal, and the specific shape and size of the housing may be determined according to the actual size of the lens 210 and other devices, which is not limited herein. The lens 210 is mounted in a housing, that is, the housing can provide a containing function for the lens 210 and other components, and the housing can also provide a protection function for the lens 210 and other components. In order to facilitate the installation of the components such as the lens 210 in the housing, the housing may include a plurality of portions, and a detachable fixed connection relationship is formed between the plurality of portions, so as to facilitate the maintenance of the components such as the lens 210.

More specifically, the housing may include a housing body 110, a rear cover 120 and a lower press cover 130, the housing body 110 is an annular structure, the lens 210 is disposed inside the housing body 110, and the rear cover 120 and the lower press cover 130 are respectively disposed at two opposite ends of the housing body 110, so as to isolate the inside of the housing body 110 from the outside. The rear cover 120 and the lower cap 130 may be fixed to the housing body 110 by a snap connection or a screw connection.

The light-transmitting blocking piece 300 is located on the light-incident side of the lens 210, and the light-transmitting blocking piece 300 is fixed to the housing, so that the light-transmitting blocking piece 300 can provide a protective effect for the lens 210, and prevent impurities such as external dust from entering the lens 210 and affecting the imaging quality of the lens 210. Specifically, the light-transmitting barrier sheet 300 may be formed of a material with relatively good light-transmitting performance, such as resin or glass, and the light-transmitting barrier sheet 300 may be fixed on the housing body 110 by bonding or clamping. As described above, the housing includes the lower cover 130, and based on this, the upper cover 400 can be fixed on the lower cover 130 or the housing body 110 by a structure such as a screw, and the light-transmitting barrier sheet 300 can be clamped and fixed between the upper cover 400 and the lower cover 130, so as to achieve the purpose of relatively fixing the light-transmitting barrier sheet 300 and the housing. In addition, the thickness of the light-transmitting barrier 300 may be determined according to practical requirements, and is not limited herein.

The light-transmitting blocking piece assembly and the end cap 500 are fixed to the housing, wherein the upper pressing cover 400 presses and holds one side of the light-transmitting blocking piece 300 departing from the lens 210, so that the light-transmitting blocking piece 300 can form a relatively fixed relation with the housing. The end cap 500 is located at a side of the light-transmitting barrier assembly facing away from the lens 210, specifically, the end cap 500 is located at a side of the upper cover 400 facing away from the light-transmitting barrier 300, and a surface of the end cap 500 and a surface of the upper cover 400 in the light-transmitting barrier assembly form a purge gap serving as a flow path of a purge gas to purge impurities such as dust that may fall in a field of view of the light-transmitting barrier 300 with the purge gas. Specifically, the end cap 500 may be fixedly mounted on the housing by using a connector such as a screw, so that the flow path of the purge gas is more reliably formed between the end cap 500 and the upper gland 400.

The outer shape and size of both the end cap 500 and the upper gland 400 may be determined according to the actual size of the housing, and the like, and are not limited herein. Meanwhile, in order to prevent the end cover 500 and the upper gland 400 from obstructing and shielding the view finding process of the lens 210, the upper gland 400 and the end cover 500 are both annular structural members, so that the annular inner side areas of the upper gland 400 and the end cover 500 are utilized to avoid the view field area of the light-transmitting baffle 300, and the lens 210 is further ensured to normally perform the view finding work. Accordingly, the specific dimensions of the end cap 500 and the inner side of the ring of the upper cover 400 can be selected according to the actual conditions such as the viewing range of the lens 210 and the position of the lens 210, so as to ensure that the end cap 500 and the upper cover 400 do not interfere with the normal viewing of the lens 210.

As above, by forming a path for gas to flow between the upper gland 400 and the end cap 500, gas can be blown to the light-transmissive barrier 300 to provide a purge effect for the light-transmissive barrier 300. In detail, as shown in fig. 2, a purge gap 11 is provided between the upper gland 400 and the end cap 500, and the inner side of the ring of the end cap 500 is configured to communicate with the gas supply device through the purge gap 11, so that gas can be supplied into the inner side of the ring of the end cap 500 along the purge gap 11 to purge the light-transmissive baffle 300. Specifically, by spacing the upper gland 400 and the end cover 500 from each other, the purge gap 11 may be formed between the upper gland 400 and the end cover 500, and the purge gap 11 and the gas supply device may be in a communication relationship through a pipe or the like.

More specifically, a side surface of the end cap 500 facing the light-transmitting barrier plate assembly includes a spacer, and the spacer is disposed parallel to a surface of the light-transmitting barrier plate assembly, specifically, the spacer is disposed parallel to a surface of the upper gland 400 facing the end cap 500, so that a purging gap is formed therebetween. In order to ensure that the flow rate of the gas blown to the light-transmitting baffle 300 is relatively large, the size of the purge gap 11 may be 0.2 to 0.5mm.

Moreover, the end cap 500 includes a flow guiding wall 511 on a side surface facing the upper cover 400 of the light-transmitting barrier assembly, and the flow guiding wall 511 can guide the gas fed from the blowing gap to flow along the surface of the flow guiding wall 511, so as to blow the view area of the light-transmitting barrier 300 in the light-transmitting barrier assembly, and prevent impurities such as dust from blocking the light-transmitting barrier 300. Specifically, a plurality of drainage walls 511 that are uniform and spaced apart from each other may be provided on the surface of the end cap 500 of the ring structure in the direction around the axis of the lens 210, and the angle that each drainage wall 511 spans in the direction around the axial direction of the lens 210 is correspondingly determined according to the parameters such as the number of the drainage walls 511 provided. In another embodiment of the present application, the flow guiding wall 511 is an annular structure, which can ensure that any position in the circumferential direction of the light-transmitting barrier 300 can be purged by gas, so as to improve the purged effect of the light-transmitting barrier 300, that is, a side surface of the end cap 500 facing the light-transmitting barrier assembly includes the flow guiding wall 511 disposed around the axis of the lens 210 without interruption.

Meanwhile, an included angle between a tangent line of a wall surface of the flow guide wall 511 communicated with the inner side of the ring of the end cover 500 and the radial direction of the lens is an outlet angle alpha, and alpha is more than 0 degree and less than 90 degrees, so that the flow guide wall 511 can provide a guide effect for gas, the gas is fed in from a blowing gap, the flowing direction of the gas flowing along the radial direction of the lens deflects and flows towards the direction close to the light-transmitting baffle 300, and impurities such as dust and the like possibly attached to the surface of the light-transmitting baffle 300 are blown. With respect to the above technical solution, in other words, in the direction in which the gas flows in the purge gap, the distance between the flow guiding wall 511 and the upper gland 400 is gradually decreased, so that the flow guiding wall 511 can provide the gas flowing along the flow guiding wall 511 with the capability of flowing toward the side of the upper gland 400 in the end cover 500.

As described above, the inner side edge of the flow guide wall 511 communicates with the inside of the ring of the end cap 500, and accordingly, the outer edge of the flow guide wall 511 communicates with the purge gap 11, so that the gas in the purge gap 11 can be sent into the region where the flow guide wall 511 is located; of course, because the ring inner side of the end cap 500 corresponds to the ring inner side of the upper gland 400, the inner edge of the drainage groove 510 can be communicated with the ring inner side of the upper gland 400, and it is ensured that the gas in the drainage groove 510 can flow to the ring inner side of the upper gland 400 along the drainage wall 511, for this reason, under the condition that the purging gap 11 is communicated with the gas supply device, the gas can flow through the purging gap 11 and is guided by the drainage wall 511, so that the gas can be sent to the ring inner side of the upper gland 400 to purge the visual field area of the light-transmitting baffle 300, thereby preventing impurities such as dust from being deposited outside the visual field area in the light-transmitting baffle 300 of the camera, and ensuring that the shooting effect of the camera is always relatively good.

The embodiment of the application discloses a camera, and its camera lens 210 is installed in the casing, and the income light side of camera lens 210 is equipped with printing opacity separation blade subassembly, for camera lens 210 provides dustproof and shelters from the effect of debris. One side of the light-transmitting baffle plate assembly, which deviates from the lens 210, is provided with an end cover 500, and the end cover 500 is an annular structural member, so as to avoid the view area of the light-transmitting baffle plate assembly, and prevent the end cover 500 from obstructing the view finding process of the lens 210. Moreover, a purging gap 11 is arranged between the surface of the end cover 500 and the surface of the light-transmitting baffle plate assembly, and the purging gap 11 is communicated with the air supply equipment; meanwhile, one side of the end cover 500 facing the light-transmitting baffle plate assembly is provided with a flow guide wall 511, an included angle between a tangent line of a wall surface of the flow guide wall 511 communicated with the inner side of the ring of the end cover 500 and the radial direction of the lens 210 is an outlet angle alpha, and the included angle is more than 0 degree and less than 90 degrees, so that the flow guide wall 511 can provide a guide effect for gas, the gas flows along the surface of the flow guide wall 511 and is swept to the view field area of the light-transmitting baffle plate assembly, and therefore impurities such as dust are prevented from being attached to and deposited on the surface of the light-transmitting baffle plate assembly.

In order to further improve the coverage of the gas blown over the light-transmitting baffle 300, optionally, α is 5 ° or more and 30 ° or less, in which case the angle of inclination of the flow-guiding wall 511 with respect to the light-transmitting baffle assembly is relatively small, so that the gas can be blown to a position in the light-transmitting baffle assembly closer to the center of the light-transmitting baffle assembly, making the area covered by the gas relatively wider.

As described above, the closer to the axis of the lens 210, the smaller the distance between the flow guide wall 511 and the upper cover 400, and optionally, the flow guide wall 511 is of a curved structure, that is, the shape of the flow guide wall 511 taken by a plane passing through the axis of the lens 210 is an arc. In another embodiment of the present application, the shape of the flow guide wall 511 taken by a plane passing through the axis of the lens 210 is a straight line segment, and more intuitively, the flow guide wall is a truncated cone-shaped structure. Under this condition, when gas flows along drainage wall 511, the direction of guidance that drainage wall 511 provided for gas is unique all the time to make the directionality of gas better, and then make the velocity of flow and the gathering nature of the gas of accomplishing the guide better relatively, under the unchangeable condition of other conditions, can promote the gaseous effect of sweeping to printing opacity separation blade 300.

As described above, a side surface of the end cap 500 facing the upper gland 400 includes the flow guiding wall 511, and optionally, the aforementioned surface of the end cap 500 further includes other surface-type structures, specifically, as shown in fig. 2, a side surface of the end cap 500 facing the upper gland 400 further includes the gap wall and the forming wall 512, the gap wall is disposed parallel to the surface of the light-transmitting barrier plate assembly, and the gap wall and the surface of the light-transmitting barrier plate assembly are sandwiched to form the purging gap. Meanwhile, the forming wall 512 is connected between the drainage wall 511 and the gap wall, the forming wall 512 and the drainage wall 511 form a drainage groove 510, and the drainage groove 510 is recessed relative to the gap wall, so that the drainage wall 511 is ensured to have the capability of guiding the air to flow to the light-transmitting baffle assembly. That is, the drainage wall 511 and the forming wall 512 form the inner wall of the drainage groove 510, wherein the end of the drainage wall 511 is the end of the drainage groove 510, the end of the drainage wall 511 is communicated with the inner side of the ring of the end cap 500, the end of the forming wall 512 away from the drainage wall 511 is the starting end of the drainage groove 510, and the starting end of the drainage groove 510 is communicated with the purging gap.

Specifically, the drainage groove 510 may be formed along with the formation of the end cap 500, that is, the drainage groove 510 is a spatial structure integrally formed on the end cap 500, and based on this, and in order to shorten the span of the drainage groove 510 in the radial direction of the lens 210 as much as possible, thereby reducing the dimensions of the end cap 500 and the upper cover 400 in the aforementioned directions, the formation wall 512 is a cylindrical side-shaped structure, that is, a figure of the drainage groove 510 taken by a plane passing through the axis of the lens 210 is a right triangle, and the hypotenuse of the right triangle is the cross section of the drainage wall 511. Under the condition of adopting above-mentioned technical scheme, the processing degree of difficulty of drainage groove 510 is relatively less, and can make the size of end cover 500 and upper gland 400 also relatively less.

As described above, the end cap 500 and the upper gland 400 are both ring-shaped structural members, and the inner side surfaces of both the end cap 500 and the upper gland 400 may be cylindrical structures. In another embodiment of the present application, a first avoiding surface 520 is disposed on the inner side of the ring of the end cover 500, the first avoiding surface 520 is a flaring structure, meanwhile, the first avoiding surface 520 extends to a side surface of the end cover 500 facing away from the upper gland 400, and the first avoiding surface 520 faces a side of the end cover 500 facing away from the upper gland 400. Under the condition of adopting the technical scheme, even if the size of the inner ring of the end cover 500 facing to one side surface of the upper gland 400 is relatively small, a good avoiding effect can be provided for the light-transmitting baffle sheet 300, the end cover 500 is prevented from being positioned in the view finding range of the light-transmitting baffle sheet 300, and the structural reliability of the end cover 500 is ensured to be relatively better.

Similarly, the ring inside of the upper gland 400 may be provided with a second avoiding surface 410, the second avoiding surface 410 is a flaring structure, the second avoiding surface 410 extends to a side surface of the upper gland 400 facing the end cap 500, and the second avoiding surface 410 faces the side of the upper gland 400 facing the end cap 500, so that the size of the inside of the upper gland 400 may be relatively small, the upper gland 400 is ensured to have relatively large structural strength, and the upper gland 400 is ensured not to obstruct the view range of the lens 210 and the light-transmitting barrier sheet 300.

Based on the above embodiment, further, as shown in fig. 2, a projection of the outer edge of the second avoiding surface 410 in the axial direction of the lens 210 may be located on the flow guiding wall 511, that is, there is a case of partial overlap between the second avoiding surface 410 and the flow guiding wall 511 in the radial direction of the lens 210, which enables the flow guiding wall 511 and the second avoiding surface 410 to be communicated with each other, prevents the upper gland 400 from blocking the gas flowing out from the flow guiding wall 511, and ensures that the fluency of the gas is relatively high.

Meanwhile, the distance between the outer edge of the second avoiding surface 410 and the inner edge of the flow guiding wall 511 in the radial direction of the lens 210 is 0.5mm, in this case, the size of the inner edge of the side surface of the upper gland 400 facing the end cover 500 is relatively large, so that the reliability of the overall structure of the upper gland 400 is ensured to be high, and the conduction between the flow guiding wall 511 and the second avoiding surface 410 is ensured to be relatively good, so as to provide a good purging effect for the light-transmitting baffle 300.

As above, the second avoiding surface 410 is a flaring structure, and optionally, the second avoiding surface 410 is a cambered surface structure. In another embodiment of the present application, an image of the second avoidance surface 410 captured by a plane passing through the axis of the lens 210 is a straight line segment, and an included angle between the straight line segment and a perpendicular line of the axis is 10 ° to 60 °, that is, the second avoidance surface is a truncated cone-shaped side surface structure. In this case, it can be ensured that the second avoiding surface 410 can provide a good avoiding effect for the light-transmitting barrier sheet 300, and the upper cover 400 is prevented from blocking the view finding range of the light-transmitting barrier sheet 300.

In addition, as described above, the light-transmitting blocking plate 300 may be sandwiched between the upper cover 400 and the lower cover 130, and in order to ensure that the upper cover 400 has good structural stability in the process of pressing the light-transmitting blocking plate 300, a cylindrical lateral surface structure is further disposed on the inner side of the ring of the upper cover 400, and the cylindrical lateral surface structure is connected to one end of the second avoiding surface 410, which is away from the end cap 500, so that a portion of the inner side of the upper cover 400, which is close to the light-transmitting blocking plate 300, has a thickness meeting requirements, and thus has a good pressing effect.

Meanwhile, in order to ensure that the light-transmitting separation blade 300 can provide a good protection effect for the lens 210, an elastic sealing sleeve 600 can be sleeved on the outer edge of the light-transmitting separation blade 300, the elastic sealing sleeve 600 can be formed by materials such as rubber, and then the light-transmitting separation blade 300 can be sealed and clamped between the upper pressing cover 400 and the lower pressing cover 130 through the elastic sealing sleeve 600, under the effect of the elastic sealing sleeve 600, on one hand, a good sealing effect can be ensured to be formed between the light-transmitting separation blade 300 and the lens 210, and on the other hand, the reliability of a relatively fixed relation between the light-transmitting separation blade 300 and the shell can be improved.

As described above, the purge gap 11 may be communicated with the gas supply device through a pipeline so that the gas supply device can supply gas to the purge gap 11, and in order to reduce the difficulty of gas supply, optionally, as shown in fig. 2, a communication chamber 12 is provided between the end cover 500 and the lower press cover 130, an inner edge of the communication chamber 12 is communicated with the purge gap 11, an outer edge of the communication chamber 12 is provided with a gas inlet 13, and the communication chamber 12 can be communicated with the gas supply device through the gas inlet 13. In addition, in order to increase the pressure and flow rate of the gas when the gas is delivered into the purge gap 11, the size of the communication cavity 12 may be more than twice the size of the purge gap 11 in the direction of the axis of the lens 210, which may ensure that the gas has a large flow rate and pressure when the gas is delivered into the purge gap 11, and further, when the gas is blown out from the drainage groove 510, the purge effect is strong, and the cleaning effect on the transparent barrier 300 is increased.

In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A camera is characterized by comprising a shell, a lens, a light-transmitting baffle plate assembly and an end cover, wherein the lens is arranged in the shell, the light-transmitting baffle plate assembly and the end cover are fixed on the shell, the light-transmitting baffle plate assembly is positioned on the light inlet side of the lens, the end cover is positioned on one side, away from the lens, of the light-transmitting baffle plate assembly, and the end cover is an annular structural member so as to avoid a view area of the light-transmitting baffle plate assembly;

the surface of the light-transmitting baffle plate assembly and the surface of the end cover are clamped to form a purging gap, the inner side of the ring of the end cover is configured to be communicated with air supply equipment through the purging gap, the surface of one side, facing the light-transmitting baffle plate assembly, of the end cover comprises a drainage wall, the drainage wall is used for guiding air to flow along the surface of the drainage wall so as to purge a view field area of the light-transmitting baffle plate assembly, an included angle formed between a tangent line of a wall surface, communicated with the inner side of the ring of the end cover, of the drainage wall and the radial direction of the lens is an outlet angle alpha, and alpha is larger than 0 degree and smaller than 90 degrees.

2. The camera of claim 1, wherein α is 5 ° or more and 30 ° or less.

3. The camera of claim 1, wherein the flow-directing wall is a frustoconical-sided structure;

the side surface of the end cover facing the light-transmitting baffle assembly comprises the drainage wall which is arranged around the axis of the lens without interruption.

4. The camera according to claim 1, wherein a side surface of the end cap facing the light-transmitting barrier sheet assembly includes a gap wall and a forming wall, the gap wall is parallel to a surface of the light-transmitting barrier sheet assembly and is sandwiched to form the purging gap, the forming wall is connected between the gap wall and the flow guide wall, the forming wall and the flow guide wall form a flow guide groove which is recessed relative to the gap wall, and the forming wall is a cylindrical side structure.

5. The camera head according to claim 1, wherein a flared first avoiding surface is provided on an inner side of the ring of the end cap, the first avoiding surface extends to a side surface of the end cap facing away from the light-transmitting barrier assembly, and the first avoiding surface faces to a side of the end cap facing away from the light-transmitting barrier assembly;

the light-transmitting baffle plate assembly comprises a light-transmitting baffle plate and an upper gland, at least one part of the upper gland is positioned between the light-transmitting baffle plate and the end cover, and the upper gland is an annular structural member;

the inner side of the ring of the upper gland is provided with a flaring-shaped second avoiding surface, the second avoiding surface extends to the upper gland towards one side surface of the end cover, and the second avoiding surface faces towards the upper gland deviating from one side of the light-transmitting separation blade.

6. The camera according to claim 5, wherein a projection of an outer edge of the second avoidance surface in an axial direction of the lens is located on the flow guide wall, and a distance between the outer edge of the second avoidance surface and an inner edge of the flow guide wall in a radial direction of the lens is 0.5mm.

7. The camera head according to claim 5, wherein the second avoiding surface is a truncated cone-shaped side surface structure, and an included angle between the second avoiding surface and a radial direction of the lens is 10-60 °.

8. The camera according to claim 5, wherein the housing includes a housing body, a rear cover and a lower pressing cover, the lens is disposed in the housing body, the rear cover and the lower pressing cover are respectively disposed at opposite ends of the housing body, an elastic sealing sleeve is sleeved on an outer edge of the light-transmitting blocking piece, and the light-transmitting blocking piece is sealed by the elastic sealing sleeve and clamped between the upper pressing cover and the lower pressing cover.

9. The camera head according to claim 8, wherein a communication chamber is provided between the end cap and the lower cover, an inner edge of the communication chamber communicates with the purge gap, an outer edge of the communication chamber is provided with an air inlet configured to communicate with the air supply device, and a size of the communication chamber is two times or more a size of the purge gap in a direction of an axis of the lens.

10. The camera according to claim 1, wherein a side surface of the end cap facing the light-transmitting barrier sheet assembly includes a spacer, the spacer is parallel to a surface of the light-transmitting barrier sheet assembly and is sandwiched to form the purging gap, and the size of the purging gap is 0.2-0.5 mm.