WO2023124010A1

WO2023124010A1 - Dust removal camera

Info

Publication number: WO2023124010A1
Application number: PCT/CN2022/105403
Authority: WO
Inventors: 王雷雷
Original assignee: 杭州海康威视数字技术股份有限公司
Priority date: 2021-12-30
Filing date: 2022-07-13
Publication date: 2023-07-06
Also published as: CN114390171A; CN114390171B

Abstract

Disclosed is a dust removal camera. The dust removal camera comprises: a housing assembly (3), upon which a lens assembly (4) is mounted; a lower cover assembly (2), which is mounted to the housing assembly (3) and has a transparent window (22), the lens assembly (4) acquiring image information by means of said transparent window (22); and a wiper assembly (1), which is mounted to the housing assembly (3) and has a wiper strip (11); wherein the transparent window (22) and the wiper strip (11) are configured to rotate relative to each other, and a surface of the transparent window (22) is cleaned by means of the wiper strip (11) sweeping across the surface of the transparent window (22).

Description

Dust removal camera

This application claims the priority of the Chinese patent application with the application number 202111649627.6 and the title of invention "A Dust Removal Camera" submitted to the China Patent Office on December 30, 2021, the entire contents of which are incorporated in this application by reference.

technical field

The disclosure relates to the field of imaging technology, in particular to a dust removal camera.

Background technique

This section provides background information related to the present disclosure only and is not necessarily prior art.

In some usage scenarios, the camera needs to have a dust removal function. The present camera dust removal structure is only applicable to the situation that the glass is a plane shape. The linear wiper is driven by the wiper motor to remove the dirt on the flat glass. This technical solution is only applicable to cameras with a plane window, such as a barrel camera without a PT adjustment function.

Contents of the invention

The purpose of the present disclosure is to provide a technical solution to realize dust removal for cameras with spherical or hemispherical windows.

To achieve the above purpose, the present disclosure provides a dust removal camera, the dust removal camera includes:

A housing assembly on which a lens assembly is installed;

a lower cover assembly, which is installed to the housing assembly and has a transparent window through which the lens assembly acquires image information; and

a wiper assembly mounted to the housing assembly having a wiper strip;

Wherein, the transparent window and the wiper strip are arranged to be relatively rotatable, and the surface of the transparent window is cleaned by the wiper strip sweeping across the surface of the transparent window.

In some embodiments, the lower cover assembly is configured to rotate integrally with the lens assembly around the first axis, and the circumferential position of the wiper assembly is fixed in the circumferential direction around the first axis;

The circumferential position of the lower cover assembly around the first axis is divided into an observation circumferential position area and a cleaning circumferential position area, and in the cleaning circumferential position area, the lower cover assembly is facing the wiper strip; In the observing circumferential position area, the lower cover assembly is staggered from the wiper strip.

In some embodiments, the transparent window is a surface of revolution.

In some embodiments, the lower cover assembly includes a hemispherical lower cover, and the transparent window is fixedly arranged on the lower cover and only occupies a partial surface of the lower cover.

In some embodiments, the wiper strip is configured to be movable relative to the housing assembly, so as to switch between a contact state and a separation state, and in the contact state, the wiper strip contacts the transparent window; In the leaving state, the wiper strip is out of contact with the transparent window; or, the wiper strip is set to be able to move relative to the housing assembly, so that the contact is tight while maintaining contact with the lower cover assembly Adjust the degree.

In some embodiments, the wiper assembly includes a wiper head, the wiper head is pivotally connected to the housing assembly through a swing shaft, the wiper strip is mounted on the wiper head, and the wiper head is rotated by the wiper head. The pivotal movement of the swing shaft realizes switching of the wiper strip between the contact state and the separation state, or adjusts the tightness of the contact of the wiper strip while maintaining contact with the lower cover assembly.

In some embodiments, the wiper assembly further includes a push rod connected to the wiper head for driving the wiper head to pivot around the swing shaft,

Wherein, the push rod is elastically loaded by a spring, and the elastic force exerted by the spring on the push rod tends to keep the wiper strip in the separated state.

In some embodiments, the wiper assembly further includes a cam, and the cam is driven by a driving motor so that the push rod moves against the elastic force of the spring, so that the wiper strip is in the contact state.

In some embodiments, the driving motor is simultaneously used to drive the lower cover assembly to rotate around the first axis, and the rotation speed and direction of the cam are the same as the rotation speed and direction of the lower cover assembly.

In some embodiments, the wiper assembly further includes a wiper fixing sheet metal, the wiper strip is fixedly mounted on the wiper fixing sheet metal, and the wiper fixing sheet metal is rotatably mounted to the wiper head through a floating shaft, and can rotate around The floating shaft swings,

Wherein, the floating rotating shaft is arranged at the middle of the lengthwise direction of the wiper strip.

In some embodiments, the ratio of the force arm L1 of the push rod to the wiper head to the force arm L2 of the wiper fixing sheet metal to the wiper head is less than or equal to 1:3.

The dust removal camera of the present disclosure cleans the surface of the transparent window through the relative rotation between the transparent window and the wiper strip, has a simple structure, and can effectively clean the curved transparent window.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings that need to be used in the descriptions of the embodiments or related technologies. Obviously, the drawings in the following description are only For some disclosed embodiments, those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a dust removal camera according to an embodiment of the present disclosure.

Fig. 2 is a schematic perspective view of the dust removal camera shown in Fig. 1 .

Fig. 3 is a schematic bottom view of the dust removal camera shown in Fig. 1 .

Figure 4 is a schematic diagram of the stroke-rotation angle of the cam.

FIG. 5 is a schematic diagram of the wiper device of the dust removal camera shown in FIG. 1 .

Fig. 6 is a sectional view along A-A direction in Fig. 5 .

Reference signs:

11	雨刷组件 wiper assembly	1818	滚轮 scroll wheel
22	下盖组件 Lower cover assembly	1919	连接板connecting plate
33	壳体组件Housing components	21twenty one	下盖 lower lid
44	镜头组件lens assembly	22twenty two	透明视窗 transparent window
1111	雨刷条wiper strip	23twenty three	补光窗 Fill light window
1212	雨刷固定钣金Wiper fixing sheet metal	24twenty four	内罩 inner cover
1313	浮动转轴Floating reels	241241	凸轮表面 cam surface
1414	雨刷头 wiper head	3131	外壳体 Shell
1515	推杆 putter	5151	摆动转轴 swing shaft
1616	弹簧 spring	5252	连接轴connecting shaft
1717	滚轮转轴 Wheel shaft	191191	限位调节螺钉Limit adjustment screw

Detailed ways

In the drawings, the same or similar reference numerals are used to denote the same or similar elements or elements having the same or similar functions. Embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings.

In the description of the present disclosure, the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", " The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the scope of this disclosure.

In the present disclosure, a "component" may be a single part or a combination of a plurality of parts.

A video camera refers to an instrument or device capable of taking pictures, especially an instrument for monitoring and taking pictures. A dust removal camera refers to a camera with a dust removal function. The dust removal camera in the embodiments of the present disclosure may be an intrinsically safe dust removal camera. Intrinsically safe type refers to an explosion-proof type of electrical equipment, which limits the spark or thermal effect energy that may be generated inside the equipment and the connecting wires exposed to potentially explosive atmospheres to a level that cannot cause ignition.

As shown in FIGS. 1 to 6 , a dust removal camera according to an embodiment of the present disclosure includes: a housing assembly 3 , a lower cover assembly 2 and a wiper assembly 1 .

The housing assembly 3 is the installation base of the dust removal camera, and can be installed and fixed to ceilings, columns, table tops and other positions in any appropriate manner. The housing assembly 3 can adopt any appropriate form, structure and material, and can also adopt any appropriate installation method. These are all within the protection scope of the present disclosure. In the illustrated embodiment, housing assembly 3 includes an outer housing 31 . The outer case 31 is fixedly mounted to a ceiling or the like by screws.

The lens assembly 4 , the lower cover assembly 2 , the wiper assembly 1 and the like are all mounted on the housing assembly 3 directly or indirectly. The lens assembly 4 can adopt any suitable form and structure. For example, the lens assembly 4 includes an imaging chip, a lens, and the like.

The lower cover assembly 2 is mounted on the housing assembly 3 and has a transparent window 22 through which the lens assembly 4 acquires image information.

In some embodiments, the lower cover assembly 2 can also be called a transparent cover assembly, and the lower cover 21 can also be called a transparent cover.

The lower cover assembly 2 includes a transparent window 22 . In the present disclosure, the transparent window 22 is a rotating window, which can rotate around the first axis O (see FIG. 3 ) driven by the rotating motor. In FIG. 1 , the first axis O is a straight line extending vertically.

The transparent window 22 and the wiper strip 11 are arranged to be relatively rotatable, and the surface of the transparent window 22 is cleaned by the wiper strip 11 sweeping over the surface of the transparent window 22 .

In a specific embodiment, the dust removal camera includes a housing assembly 3 , a lower cover assembly 2 , a lens assembly 4 and a wiper assembly 1 . The lower cover assembly 2 is mounted to the housing assembly 3 and has a lower cover 21 and a transparent window 22 . The lower cover assembly 2 is configured to be able to rotate around the axis of the lower cover relative to the housing assembly 3 under the drive of the motor. The lens assembly 4 obtains image information through the transparent window 22 , the lens assembly 4 is installed on the lower cover assembly 2 , and rotates around the axis of the lower cover together with the lower cover assembly 2 . The wiper assembly 1 is installed to the housing assembly 3, and has a wiper strip 11, the shape of the inner surface of the wiper strip 11 is adapted to the shape of the outer surface of the window glass, so that the inner surface of the wiper strip 11 is suitable for fitting the outer surface of the window glass , wherein the wiper assembly 1 is mounted to the housing assembly 3, and the circumferential position of the wiper assembly 1 is fixed in the circumferential direction around the axis of the lower cover. The foreign matter is detached from the window glass under the action of the tangential force exerted by the wiper strip.

The dust removal camera in the embodiment of the present disclosure cleans the surface of the transparent window 22 through the relative rotation between the wiper strip 11 , has a simple structure, and can effectively clean curved transparent windows.

In the illustrated embodiment, the lower cover assembly 2 includes a lower cover 21 on which the transparent window 22 is fixed. In an optional embodiment, only a part of the lower cover 21 is transparent. In this case, the rotating window and the lens assembly 4 can be set to rotate together, and the wiper strip 11 is set not to rotate around the rotating axis of the rotating window. , set in this way, when the rotating window rotates together with the lens assembly 4, the wiper strip 11 can sweep the surface of the rotating window to clean the surface of the rotating window. In some embodiments, the main body of the lower cover 21 can be made of opaque metal to improve safety performance. In the illustrated embodiment, a supplementary light window 23 is also provided. If necessary, it can also be set to clean the supplementary light window 23, which is also within the protection scope of the present disclosure.

The rotating window and the lens assembly can be set to rotate together, or can be set to rotate relative to each other.

The wiper assembly 1 is mounted to a housing assembly 3 , which has a wiper strip 11 . The part where the wiper strip 11 cooperates with the rotating window has a shape that matches or adapts to the contour of the rotating window, so as to clean the rotating window well. For example, the rotating window is convex and the wiper strip is concave, both of which have the same arc radius. Advantageously, the wiper strip is made of rubber and other materials, and has proper elasticity and coefficient of friction.

In one embodiment, the rotating window rotates with the lens assembly. That is, the lens assembly rotates integrally with the rotating window. When the lens assembly rotates to switch the observation area, the rotating window rotates together with the lens assembly. Specifically, in the observation mode, the rotating window and the lens assembly rotate together, and the change of the observation angle is realized through rotation; in the dust removal mode, the rotating window also rotates together with the lens assembly, and the rotation of the rotating window relative to the wiper is realized through rotation. movement to clean the window surface.

In another embodiment, the rotating window rotates relative to the lens assembly. For example, in the observation mode, the lens assembly rotates integrally, but the rotating window does not rotate, and the observation angle can be changed through rotation. In the dust removal mode, the lens assembly does not rotate as a whole, but the rotating window rotates. Through the rotation, the rotating window moves relative to the wiper strip, so as to clean the surface of the window.

In an optional embodiment, the rotating window is a rotary window, the outer surface of which is at least partially formed by a generatrix rotating around the axis of rotation. In an optional embodiment, the outer surface of the rotating window is mainly formed by the rotation of a generatrix around the axis of rotation. For example, the rotation axis is parallel to the first axis, and the generatrix can be an arc, a straight line, or other curves, or a combination of arcs, straight lines, or other curves.

In one embodiment, the rotating window is hemispherical. In the present disclosure, the rotating window is hemispherical, including that the rotating window is substantially hemispherical, for example slightly more spherical than the hemispherical, or slightly less spherical.

Specifically, in the illustrated embodiment, the lower cover assembly 2 is configured to rotate integrally with the lens assembly 4 around the first axis, and in the circumferential direction around the first axis, the circumferential position of the wiper assembly 1 is fixed (see FIG. 3 ). Specifically, the horizontal rotation motor drives the lower rotating body to reciprocate through gear transmission, the rotating body includes the inner cover and the lower cover assembly 2, the lower cover assembly 2 contains a hemispherical lower cover and spherical glass (transparent window), the lower cover and the lower cover assembly 2 The spherical glass is sealed and fixed by glue. The outer surface of the spherical glass is on the same spherical surface as the outer surface of the lower cover, or protrudes slightly from the outer surface of the lower cover.

For ease of illustration, in FIG. 3 , the position where the wiper assembly 1 or the wiper strip 11 is in the middle of the rotating window in the circumferential direction is 180°, and the position 0° opposite to it is the position indicated by the PO line. That is to say, this position is marked as the 180-degree position of the lower cover assembly 2 , and it can be understood that this position can also be defined as a position of other degrees, for example, this position can be defined as a 0-degree position.

The areas on the upper and lower sides of the 180° position shown in FIG. 3 are clean circumferential position areas. Clean the circumferential position area, that is, the area within the two lines MO and NO. In FIG. 4, S is the stroke of the cam, and clean the area between the circumferential position areas B1 and B2. The size of the central angle corresponding to the cleaning circumferential position area can be set as required. The central angle of the cleaning peripheral position area is equal to or slightly larger than the central angle of the transparent window.

In the cleaning peripheral position area, the lower cover assembly 2 is facing the wiper strip 11 and can be cleaned. In the observation circumferential position area, the lower cover assembly 2 and the wiper strip 11 are staggered, which is convenient for video monitoring. In other words, the circumferential position of the lower cover assembly 2 around the first axis is divided into an observation circumferential position area and a cleaning circumferential position area.

It should be pointed out that it is inconvenient to perform observation or video monitoring for the cleaning peripheral position area, because the line of sight of the lens assembly is interfered by the wiper unit.

It should be pointed out that, if necessary, the cleaning of the peripheral position area can also include the supplementary light window.

In the illustrated embodiment, the transparent window 22 is a curved surface of revolution. More specifically, the transparent window 22 is part of a curved surface of revolution.

Referring to FIG. 2 , the lower cover assembly 2 includes a hemispherical lower cover 21 , and the transparent window 22 is fixedly arranged on the lower cover 21 and only occupies a part of the surface of the lower cover 21 .

In the illustrated embodiment, the wiper strip 11 is configured to be movable relative to the housing assembly 3, thereby switching between a contact state and a separation state. In the contact state, the wiper strip 11 contacts the transparent window 22; in the separation state, The wiper strip 11 is out of contact with the transparent window 22 . Alternatively, the wiper strip 11 is configured to be movable relative to the housing assembly 3 , so that the contact tightness of the wiper strip 11 can be adjusted while maintaining contact with the lower cover assembly 2 .

As shown in the figure, the wiper assembly 1 includes a roller 18 , a push rod 15 , a spring 16 , a wiper head 14 , a floating shaft 13 (also called a wiper head shaft), a wiper fixing plate 12 and a wiper strip 11 .

The wiper strip 11 and the wiper fixing sheet metal 12 are relatively fixed and connected as one to form a wiper strip assembly. The wiper strip assembly floats around the floating rotating shaft 13 to ensure the effective fit of the wiper strip 11 and the curved glass to achieve a good dust removal effect. It can be understood that “floating” in the present disclosure means that the wiper strip 11 and the wiper fixing sheet metal 12 can swing around the floating shaft 13 to adapt to the shape of the curved glass and ensure the effective fit between the wiper strip 11 and the curved glass .

The wiper fixing sheet metal 12 is rotatably connected to the wiper head 14 through the wiper head rotating shaft 13 . That is to say, the wiper fixing sheet metal 12 can freely rotate relative to the wiper head 14 . The rotation axis (second rotation axis) of the wiper fixing sheet metal 12 is perpendicular to the first rotation axis.

The upper rotating shaft of the wiper assembly 1 and the cam of the inner cover are attached through the spring 16 . In the illustrated embodiment, the spring 16 is a compression spring. When the cam pushes up the rotating shaft to realize the wiper fitting, the spring 16 is in a compressed state. When the cam jacking distance decreases, the spring 16 pushes the push rod 15 to move to realize the separation of the wiper strip and the window. Alternatively, when the cam lifts up the rotating shaft to realize the close fit of the wiper, the spring 16 is in a compressed state. When the cam jacking distance decreases, the spring 16 pushes the push rod 15 to move, so that the wiper strip keeps in contact with the window but the contact degree becomes weaker.

Specifically, the lower cover assembly 2 further includes an inner cover 24 , and the inner cover 24 is fixedly connected with the lower cover 21 , such as integrally formed, or fixedly connected by screws. Referring to FIGS. 2 and 5 , the outer periphery of the inner cover 24 is provided with a cam surface 241 . While rotating around the axis of the lower cover, the cam surface 214 can push the push rod 15 to overcome the elastic force exerted by the spring 16, so that the wiper head 14 pivots around the swing shaft 51, and then has a tendency to move toward the direction of the window.

The cam surface 241 can push the push rod 15 directly, or push the push rod 15 indirectly.

As shown in FIGS. 1 and 2 , the wiper assembly 1 further includes a roller 18 . The roller rotating shaft 17 of the roller 18 is connected with the push rod 15 as a whole. The roller 18 can rotate around the roller shaft 17 . The roller shaft 17 is parallel to the axis of the lower cover assembly 2 . That is, the cam surface 241 indirectly pushes the push rod 15 through the roller 18 and the roller shaft 17 . Such a solution is beneficial to improving the compactness of the overall structure and making full use of the space in the camera.

The roller 18 is in rolling contact with the cam surface 241 of the inner cover 24 , and moves radially under the action of the cam surface 241 to push the push rod 15 .

In some specific embodiments, when the circumferential position of the lower cover assembly 2 around the axis of the lower cover 21 is a clean circumferential position, the cam surface 241 pushes the push rod 15 out, so that the wiper strip and the transparent window 22 fit or fit tightly Fitting: When the circumferential position of the lower cover assembly 2 around the axis of the lower cover is the observed circumferential position, the cam surface 241 allows the push rod 15 to retreat under the action of the spring 16, so that the wiper strip 11 is separated from or attached to the transparent window 22 weakened.

That is to say, in the illustrated embodiment, the wiper head 14 is pivotally connected to the housing assembly 3 through a swing shaft 51, the wiper strip 11 is installed on the wiper head 14, and the wiper head 14 rotates around the swing shaft 51. The pivotal movement of the wiper strip 11 realizes switching between the contact state and the separation state, or makes the wiper strip 11 adjust the tightness of the contact while maintaining contact with the lower cover assembly 2 .

The wiper assembly 1 further includes a push rod 15 connected to the wiper head 14 for driving the wiper head 14 to pivot around the swing shaft 51 ,

Wherein, the push rod 15 is elastically loaded by a spring 16 , and the elastic force exerted by the spring 16 on the push rod 15 tends to keep the wiper strip 11 in a separated state or a state of less contact.

As shown in Figure 2 and Figure 5, the camera is provided with a cam structure, while rotating around the central axis, the cam surface 241 can push the push rod 15 to overcome the elastic force exerted by the spring 16, so that the wiper assembly moves back and forth to realize the curved wiper Fitted with spherical glass, it has the effect of glass dust removal.

When the camera needs to remove dust, it enters the wiper dust removal mode, that is, controls the wiper motor, drives the glass area on the lower cover assembly to fit the wiper strip, and realizes dust removal through relative movement.

The design of the cam satisfies that in the monitoring mode, the wiper strip and the lower cover are separated. When entering the path of the wiper, the ejection of the cam drives the wiper to automatically fit the glass. After the fit, the wiper does not move, and the ball rotates by itself to achieve dust removal.

That is to say, the wiper assembly 1 further includes a roller 18 driven by a driving motor so that the push rod 15 moves against the elastic force of the spring 16 to make the wiper strip 11 in a contact state. In an optional embodiment, the roller 18 can be configured as a cam, driven by a separate motor, thereby pushing the push rod 15 .

In some embodiments, the wiper assembly 1 further includes a wiper fixing sheet metal 12, the wiper strip 11 is fixedly mounted on the wiper fixing sheet metal 12, and the wiper fixing sheet metal 12 is rotatably mounted to the wiper head 14 through a floating rotating shaft 13, and can rotate around the floating Rotating shaft 13 swings,

Wherein, the floating rotating shaft 13 is arranged at the middle of the lengthwise direction of the wiper strip 11 .

In some embodiments, the ratio of the force arm L1 of the push rod 15 to the wiper head 14 to the force arm L2 of the wiper fixing sheet metal 12 to the wiper head 14 is less than or equal to 1:3. In this embodiment, L2 substantially corresponds to the distance between the axis of the floating shaft 13 and the axis of the swing shaft 51 . L1 substantially corresponds to the distance between the axis of the swing shaft 51 and the straight line defined by the moving direction of the push rod. In this way, the push rod 15 only needs to move a small distance to move the wiper strip a large distance, and such a design can reduce the eccentric size of the cam surface, thereby improving the overall compact structure. Moreover, it is also possible to prevent the right end of the push rod from being stuck at the connecting shaft 52 .

Referring to FIG. 1 , FIG. 2 and FIG. 5 , in some embodiments, the wiper assembly 1 is connected to the outer casing 31 through a connecting plate 19 , and one end of the connecting plate 19 is fixedly connected to the outer casing 31 through a threaded connection. Specifically, the connection plate 19 is arranged in a cantilever manner, so that the connection plate 19 can have a certain degree of elasticity to allow certain manufacturing errors or installation errors.

In some embodiments, a limit adjusting screw 191 is provided on the connecting plate 19 . When installing or breaking down, the limit adjustment screw 191 can prevent the cam surface from applying excessive force to the roller, thereby preventing the wiper strip from acting on the glass window with excessive force.

In the illustrated embodiment, the moving direction of the push rod 15 is set to be perpendicular to the axis of the lower cover. That is, the putter moves horizontally. Alternatively, the push rod moves horizontally and radially. The push rod passes through the horizontal perforation provided on the connecting plate, and one end (left end) is integrally connected with the roller rotating shaft 17, and the other end (right end) is connected with the wiper head 14 at the connecting shaft 52. In some specific embodiments, the push rod 15 can be hinged with the wiper head, and there is a gap at the hinge. The head 14 moves up and down in a small amount, so that the push rod can be avoided from being stuck. In some embodiments, the connecting hole at the connecting shaft 52 can be set as an oblong hole, so as to allow the right end of the push rod 15 to perform a slight movement relative to the connecting shaft 52. Exemplarily, the oblong hole can be set at the at the right end.

The structure of the embodiment of the present disclosure is that the arc-shaped wiper and the arc-shaped spherical surface rotate each other to remove dust, the arc-shaped wiper is separated and bonded through the cam structure, and the arc-shaped wiper assembly and the fixed wiper head are floating and fixed, which can effectively eliminate assembly tolerances and realize The effective bonding of the wiper and the glass, this structure can effectively solve the problem of arc bonding and meet the needs of customers for dust removal in mines.

The hemispherical wiper structure of the embodiment of the present disclosure can effectively solve the situation of dirty hemispherical or spherical camera windows. The wiper strip of the new solution does not move in the wiper mode, and the horizontal motor drives the sphere to reciprocate horizontally to clean the surface of the curved glass.

Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Those skilled in the art should understand that: the technical solutions described in the foregoing embodiments can be modified, or equivalent replacements can be made to some of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the various aspects of the present disclosure. The spirit and scope of the technical solutions of the embodiments.

Claims

A dust removal camera, wherein the dust removal camera includes:

Housing assembly (3);

A lower cover assembly (2), which is installed to the housing assembly (3), and has a lower cover (21) and a transparent window (22), the lower cover assembly (2) is configured to be driven by a motor, Rotate around the axis of the transparent cover relative to the housing assembly (3),

A lens assembly (4), which acquires image information through the transparent window (22), the lens assembly (4) is installed on the lower cover assembly (2), and is wound together with the lower cover assembly (2) rotate about the axis of the transparent cover; and

A wiper assembly (1), which is mounted to the housing assembly (3), and has a wiper strip (11), the shape of the inner surface of the wiper strip (11) is adapted to the shape of the outer surface of the window glass, so as to making the inner surface of the wiper strip (11) fit to fit the outer surface of the window glass;

Wherein, the wiper assembly (1) is installed to the housing assembly (3), and in the circumferential direction around the axis of the transparent cover, the circumferential position of the wiper assembly (1) is fixed, and the wiper assembly is relatively opposite to the wiper assembly through the transparent cover. (1) Circumferential rotation, so that the foreign matter on the window glass (22) is peeled off from the window glass under the action of the tangential force exerted by the wiper strip.
The dust removal camera according to claim 1, the circumferential position of the lower cover assembly (2) around the axis of the transparent cover is divided into an observation circumferential position area and a cleaning circumferential position area, and in the cleaning circumferential position area, The lower cover assembly (2) is facing the wiper strip (11); in the observation circumferential position area, the lower cover assembly (2) is staggered from the wiper strip (11).
The dust removal camera according to claim 1, said lower cover assembly (2) comprises a hemispherical lower cover (21), said transparent window (22) is fixedly arranged on said lower cover (21), and only occupies A partial surface of the lower cover (21).
The dust removal camera according to any one of claims 1-3,

The wiper strip (11) is configured to be movable relative to the housing assembly (3), so as to switch between a contact state and a separation state, and in the contact state, the wiper strip (11) contacts the transparent A window (22); in the leaving state, the wiper strip (11) is out of contact with the transparent window (22);

Alternatively, the wiper strip (11) is configured to be movable relative to the housing assembly (3), so as to adjust the tightness of the contact while maintaining contact with the lower cover assembly (2).
The dust removal camera according to claim 4, wherein the wiper assembly (1) comprises a wiper head (14), and the wiper head (14) is pivotally connected to the housing assembly (3) through a swing shaft (51) , the wiper strip (11) is installed on the wiper head (14), through the pivotal movement of the wiper head (14) around the swing shaft (51), the wiper strip (11) is Switch between the contact state and the separation state, or make the wiper strip (11) adjust the tightness of the contact while maintaining the contact state with the lower cover assembly (2).
The dust removal camera according to claim 5, wherein the wiper assembly (1) further comprises a push rod (15), and the push rod (15) is connected with the wiper head (14) for driving the wiper head ( 14) pivot around said swing shaft (51),

Wherein, the push rod (15) is elastically loaded by a spring (16), and the elastic force exerted by the spring (16) on the push rod (15) tends to keep the wiper strip (11) in the separated state.
The dust removal camera according to claim 6, the lower cover assembly (2) also includes an inner cover (24), the inner cover (24) is fixedly connected with the lower cover (21), and the inner cover (24) A cam surface (241) is provided on the outer periphery, and while rotating around the axis of the transparent cover, the cam surface (241) can push the push rod (15) to overcome the elastic force exerted by the spring (16), so that the wiper The head (14) pivots around the swing shaft (51), so that the wiper strip (11) contacts the transparent window (22) or the lower cover (21).
The dust removal camera according to claim 7, wherein the wiper assembly (1) further comprises a roller (18), and the roller shaft (17) of the roller (18) is connected as a whole with the push rod (15), and the The roller (18) is in rolling contact with the cam surface (241) of the inner cover (24), and moves radially under the action of the cam surface (241) to push the push rod (15).
The dust removal camera as claimed in claim 8,

When the circumferential position of the lower cover assembly (2) around the axis of the transparent cover is a clean circumferential position, the cam surface (241) pushes the push rod (15) out to realize the cleaning of the wiper strip (11) ) fits with the transparent window (22);

When the circumferential position of the lower cover assembly (2) around the axis of the transparent cover is the observed circumferential position, the cam surface (241) allows the push rod (15) to retreat under the action of the spring (16), The separation of the wiper strip (11) from the transparent window (22) is realized.
The dust removal camera according to claim 9, the wiper assembly (1) further comprises a wiper fixing sheet metal (12), the wiper strip (11) is fixedly installed on the wiper fixing sheet metal (12), the The wiper fixed sheet metal (12) is rotatably mounted to the wiper head (14) through a floating shaft (13), and can swing around the floating shaft (13),

Wherein, the floating rotating shaft (13) is arranged in the middle of the lengthwise direction of the wiper strip (11).
The dust removal camera according to claim 9, the force arm L1 of the push rod (15) on the wiper head (14) and the action of the wiper fixing sheet metal (12) on the wiper head (14) The ratio of moment arm L2 is less than or equal to 1:3.