Camera assembly

Abstract

The utility model provides a camera assembly. The camera assembly comprises a mounting bracket, a lower separator, an upper separator and a fan, air inlets are formed in the lower ends of the mounting brackets. And the inner wall of the lower separator forms a funnel-shaped first cavity and partially extends into the lower end of the mounting bracket. The inner wall of the upper separator forms a cylindrical second cavity and is mechanically coupled to the upper end of the lower separator. And the second cavity is communicated with the first cavity to form a dust removal cavity. And the fan is mechanically coupled to the upper end of the upper separator, and the fan is configured as follows: when the fan works, dust is separated from gas sucked from the air inlet of the mounting bracket through the dust removal cavity, so that the gas from which the dust is separated is blown out to the window of the camera assembly through the air outlet of the fan. Air with dust enters the dust removal cavity to form a cyclone effect, so that dust in the air is separated and falls down, and relatively clean air is blown out.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of monitoring, in particular to a camera assembly. BACKGROUND

[0002] The basic principle of the camera is the same: the optical image signal is converted into an electrical signal for storage or transmission. When we take a picture of an object, the light reflected from the object is collected by the camera lens, focused on the light receiving surface of the camera device (such as the target surface of the camera tube), and then converted into electrical energy by the camera device, that is, the "video signal" is obtained. The photoelectric signal is very weak and needs to be amplified by a preamplifier, and then processed and adjusted by various circuits. Finally, the standard signal can be recorded on a recording medium such as a video recorder, transmitted through a transmission system, or displayed on a monitor.

[0003] The camera lens window is easily contaminated by dust due to the influence of the working environment and the use time, resulting in unclear camera shooting. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a camera assembly.

[0005] The present application provides a camera assembly, which comprises a mounting bracket, a lower separator, an upper separator, and a fan. The lower end of the mounting bracket has an air inlet. The inner wall of the lower separator constitutes a funnel-shaped first cavity and partially extends into the lower end of the mounting bracket. The inner wall of the upper separator constitutes a cylindrical second cavity and is mechanically coupled to the upper end of the lower separator. The second cavity communicates with the first cavity to form a dust removal cavity. The fan is mechanically coupled to the upper end of the upper separator. When the fan is working, the gas sucked in through the air inlet of the mounting bracket is separated from dust through the dust removal cavity, so that the gas separated from dust is blown out of the air outlet of the fan to the window of the camera assembly.

[0006] Further, the air inlet of the mounting bracket comprises a grid structure.

[0007] Further, the air inlet of the mounting bracket extends along the longitudinal direction and is uniformly distributed around the radial direction of the lower separator.

[0008] Further, the mounting bracket comprises a second mounting bracket and a third mounting bracket. Both the second mounting bracket and the third mounting bracket have a plurality of air inlets with grid structures. The second mounting bracket and the third mounting bracket are configured to have their respective grid structures arranged in a staggered manner.

[0009] Further, the axis of the grid structure of the air inlet of the mounting bracket is tangent to the inner wall of the lower separator.

[0010] Further, the air inlet of the upper separator is arranged on the peripheral wall of the upper separator.

[0011] Further, the air direction of the air inlet of the upper separator is perpendicular to the air direction of the air inlet of the lower separator.

[0012] Further, the upper separator comprises a convex column extending along the upper end and longitudinally downward, the inner wall of the convex column defining the aperture of the air outlet channel of the upper separator.

[0013] Further, the upper end of the air outlet channel of the upper separator is level with the upper end of the air inlet of the upper separator.

[0014] Further, the camera assembly further comprises a dust collection assembly having a cover plate which is openable and closable.

[0015] Further, the dust collection assembly is mechanically coupled to the lower end of the lower separator, so that the dust separated in the dust removal cavity via the air inlet of the mounting bracket falls to the dust collection assembly.

[0016] The camera assembly of the present application is provided with an upper separator, a lower separator and a fan, the inner wall of the lower separator forms a funnel-shaped first cavity, the inner wall of the upper separator forms a cylindrical second cavity, the second cavity communicates with the first cavity to form a dust removal cavity, and the air with dust enters the second cavity to form a cyclone effect, so that the dust in the air is separated and falls, and relatively clean air is blown out. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of the dust removal device of the present application, wherein the cover plate is in a closed state;

[0018] Figure 2 is an exploded view of the dust removal device shown in Figure 1 ;

[0019] Figure 3 is a cross-sectional view of the dust removal device shown in Figure 1 ;

[0020] Figure 4 is a cross-sectional view of the dust removal device shown in Figure 1 ;

[0021] Figure 5 is a schematic view of the upper separator of the dust removal device shown in Figure 2 ;

[0022] Figure 6 is a cross-sectional view of the upper separator shown in Figure 5 ;

[0023] Figure 7 is a schematic view of a lower separator of the dust removal device shown in Figure 2

[0024] Figure 8 is a sectional schematic view of the lower separator shown in Figure 7

[0025] Figure 9 is an enlarged view of the circled portion at A of the sectional schematic view shown in Figure 4

[0026] Figure 10 is a schematic view of a first mounting bracket of the dust removal device shown in Figure 2

[0027] Figure 11 is a sectional schematic view of the first mounting bracket shown in Figure 10

[0028] Figure 12 is a schematic view of a second mounting bracket of the dust removal device shown in Figure 2

[0029] Figure 13 is a schematic view of the dust removal device shown in Figure 1

[0030] Figure 14 is a schematic view of the dust removal device shown in Figure 2

[0031] Figure 15 is an exploded view of the schematic view shown in Figure 14

[0032] Figure 16 is a schematic view of the dust removal device shown in Figure 2 DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments (or, “modes of implementation”) of the present application will be described clearly and completely below with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0034] ​​​​​​​​​​If the application embodiments involve the terms of direction indication or position relationship (for example, up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture (as shown in the drawings); if the certain posture changes, the direction indication or position relationship also changes accordingly. In addition, the terms "first", "second", etc. in the application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0035] Referring to Figures 1 to 5 The camera assembly of the application embodiment includes a camera (not shown) and a dust removal device 100, and the camera includes a view window (not shown). The dust removal device 100 includes an upper separator 1, a lower separator 2, a fan 3 and a dust collection part 4.

[0036] The upper separator 1 is provided with a second cavity 11 and an air inlet 12 communicating with the second cavity 11. The upper separator 1 further includes a protruding column 13 extending into the second cavity 11. The protruding column 13 surrounds an air outlet passage 131 communicating with the second cavity 11.

[0037] The lower separator 2 is located below the upper separator 1 and surrounds a first cavity 21 communicating with the second cavity 11. At least part of the first cavity 21 is funnel-shaped.

[0038] The fan 3 is located above the upper separator 1, and the suction of the fan 3 causes air to enter the second cavity 11 through the air inlet 12.

[0039] The dust collection part 4 is located below the lower separator 2 and surrounds a dust collection cavity 41 communicating with the first cavity 21.

[0040] The upper separator 1 and the lower separator 2 are arranged in Figure 4 As shown by the arrows, when the air with dust enters the second cavity 11 through the air inlet 12, a cyclone effect is formed in the second cavity 11 and the first cavity 21, the dust falls into the dust collection cavity 41 due to its own gravity after colliding and rubbing with the inner wall surface of the upper separator 1 and the lower separator 2, and the purified air is discharged through the air outlet passage 131 to blow out relatively clean air; the dust removal device 100 can realize the separation of dust and air through one fan 3, one upper separator 1 and one lower separator 2, and has simple structure and relatively small size, and can be applied to small products.

[0041] Referring to Figures 5 to 6In some embodiments, the upper separator 1 includes a top wall 14, a side wall 15 extending downwardly from the top wall 14, and a protrusion 16 extending outwardly from the side wall 15. The top wall 14 and the side wall 15 enclose a second cavity 11. The protrusion 13 is formed by extending downwardly from the top wall 14. The air inlet 12 is disposed on the protrusion 16, and the air inlet 12 is tangent to the circumferential direction of the side wall 15, so that the air with dust smoothly enters the second cavity 11 laterally.

[0042] In some embodiments, the upper separator 1 includes a protrusion 13 extending downwardly along the upper end thereof, and the inner wall of the protrusion 13 defines the aperture of the air outlet passage 131 of the upper separator 1.

[0043] In some embodiments, the upper end of the air outlet passage 131 of the upper separator 1 is flush with the upper end of the air inlet 12 of the upper separator 1.

[0044] In some embodiments, the upper end of the air outlet passage 131 of the upper separator 1 is higher than the upper end of the air inlet 12 of the upper separator 1, and the present application does not limit this.

[0045] In some embodiments, the second cavity 11 is cylindrical, and the present application does not limit the shape of the second cavity 11.

[0046] In some embodiments, the air inlet 12 of the upper separator 1 is disposed on the peripheral wall of the upper separator 1.

[0047] Referring to FIG. 1, the air inlet 12 of the upper separator 1 is disposed on the peripheral wall of the upper separator 1. Figure 4 In some embodiments, the air direction of the air inlet 12 of the upper separator 1 is perpendicular to the air direction of the air inlet of the lower separator 2.

[0048] In some embodiments, the air direction of the air inlet 12 of the upper separator 1 is along the horizontal direction, and the air direction of the air inlet of the lower separator 2 is along the vertical direction.

[0049] In some embodiments, the lowermost end of the air inlet 12 is higher than the lowermost end of the protrusion 13, so as to improve the cyclone effect.

[0050] In some embodiments, the air inlet 12 is rectangular, so as to improve the cyclone effect.

[0051] The length of the air inlet 12 is defined as a, the width of the air inlet 12 is defined as b, the diameter of the air outlet channel 131 is defined as d1, the diameter of the second cavity 11 is defined as d2, the height of the air outlet channel 131 is defined as h, and the height of the second cavity 11 is defined as H. Then, a / b is greater than or equal to 2 and less than or equal to 3; a is greater than or equal to 0.4d2 and less than or equal to 0.75d2; b is greater than or equal to 0.2d2 and less than or equal to 0.25d2; d1 is greater than or equal to 0.4d2 and less than or equal to 0.65d2; H is greater than or equal to 1.5d2 and less than or equal to 2d2, and h is greater than or equal to 0.8a, so as to improve the dust and air separation effect.

[0052] In some embodiments, the upper separator 1 comprises a first ear 17 extending outwardly from the top end of the side wall 15 and a positioning portion 18 protruding outwardly from the bottom end of the side wall 15. One or more first ears 17 and one or more positioning portions 18 can be provided, and the number of the first ears 17 and the positioning portions 18 is not limited in the present application. The first ear 17 is provided with a first hole 171. The positioning portion 18 is provided with a second hole 181.

[0053] In some embodiments, the bottom end of the side wall 15 is provided with a first step portion to form a bearing portion 19 below the side wall 15.

[0054] Referring to Figures 7 to 9 The lower separator 2 comprises a side wall 22, a second ear 23 extending outwardly from the top end of the side wall 22, a retaining edge 24 extending upwardly from the second ear 23, and a positioning column 25 extending downwardly from the side wall 22. The side wall 22 encloses a first cavity 21. The second ear 23 is provided with a third hole 231.

[0055] The positioning column 25 is used to fix the dust collecting portion 4, so as to fix the lower separator 2 and the dust collecting portion 4.

[0056] In some embodiments, the top end of the side wall 22 is provided with a second step portion to form a recessed groove 221.

[0057] In some embodiments, the bottom end of the side wall 22 is provided with a receiving groove 222. The dust removal device 100 comprises a sealing ring 6 accommodated in the receiving groove 222. The sealing ring 6 is tightly sealed with the side wall 22 and the dust collecting portion 4, so as to prevent air leakage between the lower separator 2 and the dust collecting portion 4.

[0058] In some embodiments, the taper angle of the first cavity 21 is defined as a, and the diameter of the ash outlet 211 of the first cavity 21 is defined as d3. Then, a is greater than or equal to 26° and less than or equal to 30°, and d3 is greater than or equal to 1 / 3d2 and less than or equal to 1 / 2d2, so as to improve the dust and air separation effect.

[0059] In combination Figure 4, the upper separator 1 and the lower separator 2 are fixed. The dust removal device 100 includes fixing screws 5. The head of the fixing screw 5 passes through the third hole 231 and is assembled in the first hole 171 and screwed and fixed in the second hole 181 and with the positioning part 18 to fix the upper separator 1 and the lower separator 2.

[0060] After the upper separator 1 and the lower separator 2 are fixed, the flange 24 is located outside the positioning part 18. The first step part and the second step part are adapted, and the abutting part 19 is located in the recessed groove 221 to increase the stability of the fixation of the upper separator 1 and the lower separator 2 and reduce the probability of air leakage between the upper separator 1 and the lower separator 2.

[0061] In some embodiments, the lower separator 2 supports the upper separator 1 from below, and there is no fixed relationship between them.

[0062] Refer Figures 2 to 4 And Figures 10 to 12 , in some embodiments, the dust removal device 100 includes a mounting bracket (not labeled), and its lower end has an air inlet 811. The inner wall of the lower separator 2 forms a funnel-shaped first cavity 21 and partially extends into the lower end of the mounting bracket. The inner wall of the upper separator 1 forms a cylindrical second cavity 11 and is mechanically coupled to the upper end of the lower separator 2. The second cavity 11 is connected to the first cavity 21 to form a dust removal cavity. The fan 3 is mechanically coupled to the upper end of the upper separator 1. The fan 3 is configured such that when the fan 3 operates, the gas inhaled from the air inlet 811 of the mounting bracket is separated from dust through the dust removal cavity, so that the gas separated from dust is blown out from the air outlet 30 of the fan 3 to the window of the camera assembly.

[0063] In some embodiments, the air inlet 811 of the mounting bracket includes a grid structure.

[0064] In some embodiments, the air inlet of the mounting bracket 811 extends longitudinally and is evenly distributed radially around the lower separator 2.

[0065] In some embodiments, the axis of the grid structure of the air inlet 811 of the mounting bracket is tangent to the inner wall of the lower separator 2.

[0066] In some embodiments, the mounting bracket includes a first mounting bracket 7 and a second mounting bracket 81. The fan 3 is fixed to the first mounting bracket 7. At least part of the upper separator 1 is located in the space surrounded by the first mounting bracket 7. The air enters the air inlet 12 after passing through the second mounting bracket 81. The second mounting bracket 81 can filter larger particle dust, improve the dust removal effect, prevent noise caused by the collision of larger particle dust with the upper separator 1 or the lower separator 2, prevent more dust from falling into the dust collection cavity 41, and extend the service life.

[0067] In some embodiments, the second mounting bracket 81 is fixed to the first mounting bracket 7, such as by snap or screw locking.

[0068] In some embodiments, the second mounting bracket 81 and the third mounting bracket 82 are provided, and each of the second mounting bracket 81 and the third mounting bracket 82 has a plurality of grid-shaped air inlets 811. The second mounting bracket 81 and the third mounting bracket 82 are configured to be arranged in a staggered manner.

[0069] In some embodiments, the second mounting bracket 81 is fixed to the third mounting bracket 82, such as by snap or screw locking.

[0070] In some embodiments, the second mounting bracket 81 and the third mounting bracket 82 are arranged in a stacked manner along the height direction of the dust removal device 100.

[0071] In some embodiments, the fan 3 can also be fixed to the upper separator 1.

[0072] In some embodiments, the first mounting bracket 7 includes a top portion 71, a surrounding wall 72 extending from the top portion 71, and a fixing portion 73 extending from the surrounding wall 72 and arranged laterally. The upper separator 1 is arranged in a space surrounded by the top portion 71 and the surrounding wall 72. The fixing portion 73 is arranged outside the surrounding wall 72 and extends vertically to achieve lateral mounting and fixing of the dust removal device 100.

[0073] In some embodiments, a fixing screw 731 can be assembled on the fixing portion 73 to fix the dust removal device 100.

[0074] The fan 3 is fixed to the top portion 71. The fan 3 and the top portion 71 are fixed by the first screw 31.

[0075] The first ear portion 17 of the upper separator 1 is fixed to the top portion 71 by the second screw 10, and the first hole 171 is used for the second screw 10 to pass through.

[0076] In some embodiments, a sealing member 32 is arranged between the fan 3 and the top portion 71 to prevent air leakage between the fan 3 and the top portion 71.

[0077] In some embodiments, the top portion 71 is provided with a through hole 711 that is in communication with the air outlet channel 131 to allow air to pass out, or to allow the top end of the protruding column 13 to pass out.

[0078] In some embodiments, the second mounting bracket 81 is arranged below the first mounting bracket 7 in a ring shape, and the second mounting bracket 81 is provided with a passage 810 for the upper separator 1 or the lower separator 2 to pass through, to prevent dust-laden air from directly entering the air inlet 12 without passing through the second mounting bracket 81.

[0079] In some embodiments, the second mounting bracket 81 is fixed to the wall 72.

[0080] In some embodiments, the second mounting bracket 81 is fixed to the wall 72 by buckles, which facilitates the dismounting of the second mounting bracket 81 for maintenance. In other embodiments, the second mounting bracket 81 can be fixed to the wall 72 by screws or bolts, etc. In some embodiments, the second mounting bracket 81 comprises an air inlet 811 and an air outlet 812, the air inlet 811 is directed towards the dust collecting part 4, and the air inlet 811 and the air outlet 812 are arranged in a staggered manner along the height direction of the second mounting bracket 81, so as to prolong the path of the air passing through the second mounting bracket 81, and to improve the filtering effect.

[0081] In some embodiments, the air inlet 811 can be provided with one or more, and the multiple air inlets 811 are arranged in sequence along the circumferential direction of the second mounting bracket 81.

[0082] In some embodiments, the air outlet 812 can be provided with one or more, and the multiple air outlets 812 are arranged in sequence along the circumferential direction of the second mounting bracket 81.

[0083] In some embodiments, the second mounting bracket 81 can be provided with one or more, and the multiple second mounting brackets 81 are fixed, for example, by buckles or by screws or bolts, etc.

[0084] In some embodiments, the second mounting bracket 81 comprises two layers of grids, each layer has n vanes, and the two layers of grids are staggered by one vane angle along the central axis. Two second mounting brackets 81 are stacked to form four layers of grids, so that the air containing dust is filtered to remove a part of large particles of dust before entering the second cavity 11, i.e. primary filtering.

[0085] In some embodiments, the third mounting bracket 82 has the same structure as the second mounting bracket 81, which will not be described in detail here. The structure of the third mounting bracket 82 can also be different from that of the second mounting bracket 81.

[0086] In some embodiments, a filtering element, such as a filter screen, etc. can also be provided at the air inlet 12 to filter larger particles of dust.

[0087] Referring to Figures 13 to 16 In some embodiments, the dust collecting part 4 comprises a main body 42 and a cover plate 43 connected to the main body 42, the main body 42 surrounds a dust collecting cavity 41, and the cover plate 43 can be switched between an open state and a closed state to open and close the dust collecting cavity 41, so as to facilitate the pouring of dust.

[0088] In some embodiments, the dust removal device 100 comprises a dust collecting assembly (not labeled) including a dust collecting part 4 and a motor 9.

[0089] In some embodiments, the dust collecting assembly is mechanically coupled to the lower end of the lower separator 2, so that the dust separated in the dust removal cavity from the gas sucked in through the air inlet 811 of the mounting bracket falls to the dust collecting assembly.

[0090] In some embodiments, the dust collecting assembly has an openable and closable cover plate 43, and the motor 9 drives the cover plate 43 to switch between the open state and the closed state, so that the dust can be automatically cleaned, which is more humanized; and the situation that the dust in the dust collecting cavity 41 is too much and not cleaned in time due to manual cleaning can be solved, so as to improve the dust removal effect.

[0091] In some embodiments, the lower separator 2 is fixed to the main body 42, for example, by screwing or buckling.

[0092] In some embodiments, the motor 9 is fixed to the main body 42, and the motor shaft of the motor 9 is connected to the cover plate 43 to rotate the cover plate 43, so as to open and close the cover plate 43.

[0093] In some embodiments, the motor shaft of the motor 9 is fixed to the cover plate 43 by a third screw 44 to eliminate the shaking amount after assembly.

[0094] In some embodiments, the cover plate 43 is provided with a torsion spring 431, and the elastic force of the torsion spring 431 can automatically switch the cover plate 43 to the closed state.

[0095] In some embodiments, the dust collecting part 4 comprises a shaft sleeve 46 fixed to the main body 42, and the cover plate 43 comprises a rotating shaft 432 rotatably connected to the shaft sleeve 46.

[0096] In some embodiments, the torsion spring 431 is sleeved on the rotating shaft 432.

[0097] In some embodiments, the shaft sleeve 46 is provided with a plurality of convex points 461 in the shaft hole, and the convex points 461 are in contact with the rotating shaft 432 to reduce the friction during rotation.

[0098] In some embodiments, the dust collecting part 4 comprises a bearing fixed to the shaft sleeve 46, the outer ring of the bearing is fixed to the shaft sleeve 46, and the rotating shaft 432 is fixed to the inner ring of the bearing, so as to increase the smoothness during rotation.

[0099] In some embodiments, the dust collecting part 4 comprises a sealing device 45 located in the dust collecting cavity 41, and a part of the sealing device 45 extends out of the main body 42 to seal with the cover plate 43, so as to prevent air or dust from leaking through the gap between the cover plate 43 and the main body 42.

[0100] Part of the sealing device 45 is located in the dust collecting cavity 41, which not only facilitates fixing the sealing device 45, but also improves the sealing effect of the dust collecting cavity 41; and when the sealing device 45 is too dirty, the sealing device 45 can also be replaced.

[0101] In some embodiments, the sealing device 45 is made of silicone rubber with a hardness of 45HA, and the sealing device 45 is attached to the main body 42 by adhesive, and the cover plate 43 is in interference fit with the sealing device 45 when the cover plate 43 is closed, thereby achieving the sealing of the dust collecting cavity 41.

[0102] In some embodiments, the dust collecting part 4 can be detachably connected to the lower separator 2, and after the dust collecting part 4 is detached, dust can be blown out.

[0103] In some embodiments, the dust collecting part 4 is a dust collecting bag, and the shape and material of the dust collecting part 4 are not limited in the present application.

[0104] The dust removal device 100 of the embodiments of the present application has a relatively small volume, and can be applied to small products that require dust removal. Large particles of dust are filtered through the mounting bracket, and particles in a certain particle size range in the air are separated by the small cyclone separator structure composed of the upper separator 1 and the lower separator 2, and relatively clean gas is blown out. The dust collecting part 4 and the motor 9 are used to realize the functions of automatic dust collecting and dust discharging, thereby achieving the purposes of dust removal and maintenance-free.

[0105] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A camera assembly, characterized by The camera assembly comprises: a mounting bracket having an air inlet at a lower end thereof; a lower separator having a funnel-shaped first cavity defined by an inner wall thereof and partially extending into the lower end of the mounting bracket; an upper separator having a cylindrical-shaped second cavity defined by an inner wall thereof and mechanically coupled to an upper end of the lower separator, the second cavity being in communication with the first cavity to form a dust separation chamber; a fan mechanically coupled to an upper end of the upper separator, the fan being configured to separate dust from air drawn into the air inlet of the mounting bracket via the dust separation chamber when the fan is in operation, so that the dust separated air is blown out of an air outlet of the fan to a view window of the camera assembly.

2. The camera assembly of claim 1, wherein, The air inlet of the mounting bracket comprises a grid structure.

3. The camera assembly of claim 1, wherein, The air inlet of the mounting bracket extends along a longitudinal direction and is uniformly distributed around a radial direction of the lower separator.

4. The camera assembly of claim 2, wherein, The mounting bracket comprises a second mounting bracket and a third mounting bracket, each of the second and third mounting brackets having a plurality of air inlets of grid structures, the second and third mounting brackets being configured to have their respective grid structures arranged in a staggered manner.

5. The camera assembly of claim 2 or 4, wherein, The grid structure of the air inlet of the mounting bracket has an axis that is tangential to the inner wall of the lower separator.

6. The camera assembly of claim 1, wherein, The air inlet of the upper separator is provided on a peripheral wall of the upper separator.

7. The camera assembly of claim 1, wherein, The air inlet of the upper separator has an air direction that is perpendicular to an air direction of the air inlet of the lower separator.

8. The camera assembly of claim 1, wherein, The upper separator comprises a protruding column extending along an upper end thereof and longitudinally downward, an inner wall of the protruding column defining an aperture of an air outlet passage of the upper separator.

9. The camera assembly of claim 8, wherein, An upper end of the air outlet passage of the upper separator is flush with an upper end of the air inlet of the upper separator.

10. The camera assembly of claim 9, wherein, The camera assembly further comprises a dust collection assembly having an openable and closable cover.

11. The camera assembly of claim 10, wherein, The dust collection assembly is mechanically coupled to a lower end of the lower separator, so that dust separated from air drawn into the air inlet of the mounting bracket in the dust separation chamber falls to the dust collection assembly.

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