Camera

Abstract

The utility model discloses a camera. The camera comprises a camera body and a blowing assembly, the camera body comprises a window, and the window comprises a window outer surface located outside the camera; the air blowing assembly comprises a fan, a filtering assembly and an air outlet channel, and the fan is arranged on the peripheral side of the window; the filtering assembly can filter air blown to the window; the air outlet channel comprises an air outlet section, and the air outlet section extends in the direction parallel to the outer surface of the window so that air generated by the fan can be blown to the outer surface of the window. Therefore, air blown to the outer surface of the window is clean, the path of the air is short, and the camera can better blow away dust and / or water attached to the outer surface of the window. Compared with a mode of adopting a windshield wiper assembly, the problem of dry brushing does not exist, and the situation that dirt is reversely increased due to reciprocating motion of the windshield wiper when dirt such as dust and / or water is blown away does not exist.

Description

Technical Field

[0001] This application relates to the field of camera technology, and more particularly to camera cameras. Background Technology

[0002] The camera includes a camera body and a viewing window. The viewing window is mounted on the camera body. In outdoor or other working environments, the viewing window may accumulate dust and / or water. To remove dust and / or water, one method is to install a wiper assembly on the camera. The wipers of the wiper assembly swing back and forth to remove dust and / or water, thereby cleaning the viewing window.

[0003] In the aforementioned cameras, when only dry impurities such as dust are present, the wipers will dry-wipe during cleaning, resulting in poor cleaning performance. In some cases, the unremoved dust mixes with water, which can lead to an increase in dirt as the wipers move back and forth. Utility Model Content

[0004] The purpose of this application is to disclose a camera. The camera has good cleaning performance and avoids the reverse accumulation of dirt.

[0005] This application discloses a camera, which includes a camera body and a blowing assembly, wherein: the camera body includes a viewing window, the viewing window including an outer surface of the viewing window located outside the camera; the blowing assembly includes a fan, a filter assembly, and an air outlet channel, the fan being disposed around the viewing window; the filter assembly is capable of filtering the air blown toward the viewing window; the air outlet channel includes an air outlet section extending in a direction parallel to the outer surface of the viewing window, so that the air generated by the fan is blown toward the outer surface of the viewing window.

[0006] In some embodiments, the blower assembly includes at least one of the following features:

[0007] a) The fan is a fan, the fan's shaft is parallel to the outer surface of the viewing window, and the air outlet channel is a straight channel;

[0008] b) The fan is a frameless fan, including a blade frame and blades located within the blade frame, wherein the blade frame and the blades rotate synchronously;

[0009] c) The blower assembly is located on the top of the camera body so that the air generated by the fan blows from the top edge to the bottom edge of the outer surface of the viewing window.

[0010] In some embodiments, the air outlet channel includes an air guide cavity, which includes an air cavity inlet and an air cavity outlet. The air cavity inlet is directly opposite the air outlet of the fan. The cross-sectional area of ​​the air guide cavity gradually decreases along the direction from the air cavity inlet to the air cavity outlet until it is equal to the cross-sectional area of ​​the air outlet section.

[0011] In some embodiments, the outlet of the air outlet section is provided with a guide wall; the inner wall of the guide wall is inclined at an acute angle toward the outer surface of the window, so that the air generated by the fan blows toward the outer surface of the window.

[0012] In some embodiments, the angle of inclination of the inner wall surface toward the outer surface of the window is α, where 10 degrees ≤ α ≤ 40 degrees.

[0013] In some implementations, the side where the subject is located is considered the front of the camera, the viewing window is tilted towards the front of the camera body, and the angle between the viewing window and the reference surface is an acute angle. The reference surface is perpendicular to the optical axis of the camera lens.

[0014] In some embodiments, the angle between the window and the reference plane is b, where 15 degrees ≤ b ≤ 40 degrees.

[0015] In some embodiments, the blower assembly is disposed on the top of the camera body, with the side where the subject is located as the front of the camera, and the blower assembly protrudes forward toward the viewport.

[0016] In some embodiments, the camera includes a button and an elastic element, the button including a locking part; the camera includes a lamp arm and a fill light mounted on the lamp arm; the lamp arm is provided with spaced locking grooves; the lamp arm is rotatable around the camera body to have an open state and a retracted state; in the open state and the retracted state, the locking part is located in different locking grooves under the action of the elastic element, and at least one mating surface of the locking part that mates with the corresponding locking groove is an inclined surface.

[0017] In some embodiments, the camera includes at least one of the following features:

[0018] a) The width of the locking part and the width of the locking groove both gradually decrease along the direction in which the locking part enters the locking groove;

[0019] b) When the lamp arm is in the open state, the vertical distance between the fill light and the optical axis of the camera lens is d, where d ≥ 300 mm;

[0020] c) The camera body has guide grooves evenly distributed around the button in the circumference; the button has guide parts evenly distributed in the circumference, the guide parts are located in the guide grooves one by one, and one of the guide parts is integrally constructed with the locking part.

[0021] For the aforementioned camera, because the air blowing assembly includes a filter, the air blown towards the outer surface of the viewing window is relatively clean. Furthermore, the fan's placement around the perimeter of the viewing window results in a shorter air path and stronger airflow (e.g., air pressure). The axis of the air outlet is parallel to the outer surface of the viewing window, maximizing the area of ​​airflow. Ultimately, this allows the airflow to more effectively remove dust and / or water adhering to the outer surface of the viewing window. Compared to using a wiper assembly, the absence of a wiper assembly eliminates the problem of aging of wiper components (e.g., wiper blades). Moreover, the airflow effectively blows away dust and other dirt, eliminating the problem of dry wiping. The removal of dust and / or water also prevents the reciprocating motion of the wipers from causing further dirt accumulation. Attached Figure Description

[0022] Figure 1 This is a stereoscopic view of the camera in this application from one angle;

[0023] Figure 2 This is a stereoscopic view of the camera in this application from another angle;

[0024] Figure 3 This is a cross-sectional view of the camera in this application;

[0025] Figure 4 yes Figure 3 Enlarged view of section A;

[0026] Figure 5 yes Figure 3 Enlarged view of section B;

[0027] Figure 6 This is a perspective view of the button in this application;

[0028] Figure 7 This is a perspective view of a portion of the lamp arm of this application;

[0029] Figure 8 This is a schematic diagram of an assembly consisting of a portion of the camera body, a portion of the light arm, and buttons, as per this application.

[0030] Figure 9 It is along Figure 8 A cross-sectional view along line AA;

[0031] Figure 10 It is along Figure 8 A cross-sectional view of the BB line;

[0032] Figure 11 This is a cross-sectional view from another angle of the assembly consisting of a portion of the camera body, a portion of the light arm, and a button, illustrating the state of the button and the elastic element when the light arm and the camera body are in an open or retracted state.

[0033] Figure 12 This is a cross-sectional view from another angle of the assembly consisting of a portion of the camera body, a portion of the lamp arm, and a button, illustrating the state of the button and the elastic element during the rotation of the lamp arm.

[0034] Figure 13 This is an exploded view of the blower assembly of this application;

[0035] Figure 14 This is a perspective view of the fan (blower) of this application;

[0036] Figure 15 It is a 3D diagram of a fan in related technologies. Detailed Implementation

[0037] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0038] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0039] See Figures 1 to 3 This application discloses a camera. The camera includes a camera body 1 and a blower assembly 2. The camera body 1 includes a viewing window 11, a lens 12, a circuit board, and other components. The viewing window 11 includes an outer surface 111 located outside the camera, that is, the outer surface 111 is exposed and may be covered by water (such as rainwater) and / or dirt such as dust.

[0040] The air blowing assembly 2 includes a fan 21, a filter assembly, and an air outlet duct 22. The fan 21 is located around the periphery of the viewing window 11, such as on the upper, lower, left, or right side of the viewing window 11. One function of the fan 21 is to generate air; for example, it can be a fan or a blower. The method and location of air intake are not limited, as long as the air ultimately cleans the outer surface 111 of the viewing window. Figure 2The diagram illustrates air intake at point m. The filter assembly can filter the air blowing towards the viewing window 11; its structure is not limited. The location of the filter assembly is not limited; it can filter the air blown out of the fan 21 or the air entering the fan 21, as long as the air blowing towards the viewing window 11 is clean. See also... Figure 13 A blower assembly 2 includes a filter 291, a fan cover 292, a fan bracket 293, a fixing sheet metal 294, and a shock absorber 295. These components can be assembled in any manner. The air outlet channel 22 includes an air outlet section 221, which extends parallel to the outer surface 111 of the viewing window, so that the air generated by the fan 21 is blown toward the outer surface 111 of the viewing window. For example, if the air outlet section 221 is cylindrical (with a circular cross-section), its axis is parallel to the outer surface 111 of the viewing window. Of course, the cross-section of the air outlet section 221 can also be other shapes, such as square. The structure of other parts of the air outlet channel 22 is not limited, as long as the air generated by the fan 21 passes through the air outlet section 221 and is blown toward the outer surface 111 of the viewing window.

[0041] As described above, since the blowing assembly 2 includes a filter, the air blown towards the outer surface 111 of the window is relatively clean. Combined with the fact that the fan 21 is positioned around the periphery of the window 11, resulting in a shorter air path and stronger airflow (e.g., air pressure), and the axis of the air outlet section 221 being parallel to the outer surface 111 of the window, the effective area of ​​the airflow is larger. Ultimately, this allows the airflow to better remove dust and / or water adhering to the outer surface 111 of the window. Compared to using a wiper assembly, because no wiper assembly is used, there is no issue of aging of wiper components (e.g., wiper blades). Furthermore, the airflow blows away dust and other dirt, and without a wiper assembly, there is no dry wiping problem. The removal of dust and / or water also prevents the reciprocating motion of the wipers from causing a reverse accumulation of dirt.

[0042] See Figure 3 and Figure 4 The blower assembly 2 includes at least one of the following features:

[0043] a) The fan 21 is a fan, the fan shaft is parallel to the outer surface 111 of the window, the air outlet channel 22 is a straight channel, the straight channel means that the air outlet channel is straight as a whole, and the area of ​​the cross section of the air outlet channel 22 perpendicular to the airflow direction may not be equal.

[0044] As described above, since the fan shaft is parallel to the outer surface 111 of the window and the air outlet 22 is a straight channel, the path from the fan 21 to the outer surface 111 of the window is the shortest, the loss is small, and the air intensity is large. As a result, dust and / or water and other dirt are more easily blown away, and the cleaning effect on the outer surface 111 of the window is better.

[0045] b) See Figure 14 The fan 21 is a frameless fan, including a blade frame 211 and a blade 212 located inside the blade frame 211. The blade frame 211 and the blade 212 rotate synchronously. Figure 15 The framed fan of the related technology has a fan blade 212 located inside the fan frame 213. The fan frame 213 is stationary, and the fan blade 212 rotates relative to the fan frame 213. The gap between the fan blade 212 and the fan frame 213 is small, which can easily lead to dust accumulation and cause the fan blade 212 to rotate poorly (or even become blocked).

[0046] As described above, compared to framed fans in related technologies, the frameless fan of this application, because the blade frame 211 and the blades 212 rotate synchronously, has a larger gap between them, making it less prone to dust accumulation. Even if dust does accumulate, the synchronous rotation of the blade frame 211 and the blades 212 causes the dust to fall off due to centrifugal force, ensuring smooth rotation of the blades 212. Furthermore, the larger gap also helps prevent the fan 21 from stalling. Combined with the guiding effect of the blade frame 211 on the airflow, this also contributes to better airflow performance.

[0047] c) See also Figure 3 The air blowing assembly 2 is located on the top of the camera body 1, so that the air generated by the fan 21 blows from the top edge to the bottom edge of the outer surface of the viewing window. The top is based on the camera's normal operating state, for example... Figures 1 to 3 The light arm 6 can be considered to be located at the bottom of the camera. Top is relative to bottom.

[0048] As described above, since the blower assembly 2 is located at the top of the camera body 1, the air generated by the fan 21 blows from the top edge to the bottom edge of the outer surface 111 of the viewing window. On the one hand, compared with the blower assembly 2 being located at the bottom of the camera body 1 so that the air blows from bottom to top, water and / or dust and other dirt will fall due to gravity. The fan 21 can blow away water and / or dust with a relatively small air intensity. The blown water and / or dust and other dirt will not fall down to the blower assembly 2, and the dust will not fall back to the outer surface 111 of the viewing window after the blower assembly 2 stops blowing, which would result in poor cleaning effect. On the other hand, compared with the blower assembly 2 being located on the left, right or diagonal side of the viewing window 11, the blower assembly 2 being located at the top of the camera body 1 makes the camera more aesthetically pleasing.

[0049] See Figure 3 and Figure 4 The air outlet channel 22 includes an air guide cavity 222. The air guide cavity 222 includes an air cavity inlet 2221 and an air cavity outlet 2222. The air cavity inlet 2221 is directly opposite the air outlet of the fan 21. The cross-sectional area of ​​the air guide cavity 222 gradually decreases along the direction from the air cavity inlet 2221 to the air cavity outlet 2222 until it is equal to the cross-sectional area of ​​the air outlet section 221 (the cross-sectional area can also be understood as the air flow area). Thus, the shape of the air guide cavity can be frustum-shaped, truncated pyramidal, etc.

[0050] As described above, the cross-sectional area of ​​the air guide cavity 222 gradually decreases along the direction from the air cavity inlet 2221 to the air cavity outlet 2222 until it is equal to the cross-sectional area of ​​the air outlet section 221. This allows the air guide cavity 222 to guide and concentrate the air, which is beneficial for higher air pressure. Furthermore, the air cavity inlet 2221 is directly opposite the fan 21. Combined with the relationship between the air guide cavity 222 and the air outlet section 221, the air path is shorter, which is also beneficial for higher air pressure. Finally, the higher air pressure air blows towards the outer surface 111 of the window, which will result in a better cleaning effect on the outer surface 111 of the window.

[0051] See Figure 5 and combined Figure 3 The outlet of the air outlet section 221 is provided with an air guide wall 2211. The inner wall surface of the air guide wall 2211 (the surface facing the outer surface 111 of the viewing window) is inclined at an acute angle towards the outer surface 111 of the viewing window. Figure 4 and Figure 5 The acute angle is shown as a), so that the wind generated by the fan 21 blows towards the outer surface 111 of the window.

[0052] As described above, the inner wall of the air guide wall 2211 is inclined at an acute angle toward the outer surface 111 of the viewing window, so that the air is blown toward the outer surface 111 of the viewing window, thereby improving the cleaning effect of water and / or dirt such as dust.

[0053] See Figure 4 and Figure 5 The angle at which the inner wall surface is inclined toward the outer surface 111 of the window is α, 10 degrees ≤ α ≤ 40 degrees, for example, 10 degrees, 13 degrees, 15 degrees, 18 degrees, 20 degrees, 23 degrees, 25 degrees, 28 degrees, 30 degrees, 33 degrees, 35 degrees, 38 degrees or 40 degrees.

[0054] As set up above, 10 degrees ≤ a ≤ 40 degrees can better direct the airflow toward the outer surface 111 of the window, thus improving the cleaning effect of water and / or dirt such as dust.

[0055] See Figures 1 to 3With the side where the subject is located as the front of the camera, the viewing window 11 is tilted towards the front of the camera body 1, and the angle between it and the reference surface is an acute angle. The reference surface is perpendicular to the optical axis of the camera lens 12. Figure 3 The angle of inclination is shown as b.

[0056] In some implementations, the viewing window 11 is parallel to the reference plane. When the monitoring screen is directly illuminated by light, ghosting and other problems occur, resulting in a blurry monitoring image and missing monitoring information. As described above, the viewing window 11 is at an acute angle to the reference plane and is no longer parallel to it. This helps to avoid ghosting and other problems in the image.

[0057] See Figure 3 The angle between the window 11 and the reference plane is b, where 15 degrees ≤ b ≤ 40 degrees, for example, 15 degrees, 18 degrees, 20 degrees, 22 degrees, 25 degrees, 28 degrees, 30 degrees, 33 degrees, 35 degrees, 38 degrees or 40 degrees.

[0058] As mentioned above, 15 degrees ≤ b ≤ 40 degrees helps to avoid problems such as ghosting and image distortion in the picture.

[0059] See Figures 1 to 3 The blower assembly 2 is located on the top of the camera body, with the side where the subject is located as the front of the camera, and the blower assembly 2 protrudes in front of the viewing window 11.

[0060] As set above, see Figure 2 and Figure 3 The blower assembly 2 is located on top of the camera body 1 and protrudes forward toward the viewport 11. In this way, the blower assembly 2 shields the viewport 11, which helps to prevent water (such as rainwater) and / or dust from adhering to the outer surface 111 of the viewport. The blower assembly 2 can be understood as an eaves to understand the aforementioned shielding effect.

[0061] See Figures 6 to 12 The camera includes a button 4 and an elastic element 5. The elastic element 5 is not limited to a spring; it can also be elastic rubber, etc. Of course, the structure of the elastic element 5 is not limited, as long as it can deform to achieve the reset and pressing of the button 4. The button 4 includes a locking part 41. See also... Figures 1 to 3 The camera includes a light arm 6 and a fill light 7 mounted on the light arm 6. The light arm 6 is provided with spaced locking grooves 61, thus there are two locking grooves 61. The light arm 6 can rotate around the camera body 1 to have an open state and a retracted state. Figure 1 In the middle, rotate in the direction of arrow r. After unlocking, the lamp arm 6 switches from the open state to the closed state. Rotate in the direction of arrow R to switch from the closed state to the open state.

[0062] In the open state and the closed state, the locking part 41 is located in different locking grooves 61 under the action of the elastic member 5, and at least one mating surface of the locking part 41 that mates with the corresponding locking groove 61 is an inclined surface. Figure 6 The diagram illustrates that the sides 411 of the locking part 41 opposite to each other are both sloped surfaces. Figure 7 The locking groove 611 is also shown to be a sloped surface. In the open and locked states, the locking part side 411 and the locking groove side 611 form a mating surface. The following describes how the lamp arm 6 switches between the open and retracted states.

[0063] Switching from open to closed state: See Figure 1 , Figure 8 , Figure 9 and Figure 11 When the lamp arm 6 is in the open state, the locking part 41 is located in one locking groove 61, and the other locking groove 61 is empty (see Figure 9 In this state, press button 4 (in...). Figure 1 , Figure 8 and Figure 9 Press down in the direction of arrow n), the elastic element 5 deforms (e.g., is compressed), and the locking part 41 moves downward out of the current locking groove 61. At this time, the lamp arm 6 is in the unlocked state. Rotate the lamp arm 6 in the direction of arrow r. During the rotation, the state of the locking part 41 and the lamp arm 6 is referenced. Figure 12 The locking part 41 abuts against the connecting part 62 between the two locking grooves 61. Continue rotating the lamp arm 6 until the locking part 41, under the action of the elastic member 5, enters another locking groove 61. During the process of the locking part 41 entering the locking groove 61, the side 411 of the locking part engages with the side 611 of the locking groove. Finally, through the inclined engagement, the locking part 41 is fully inserted into the locking groove 61, completing the switch from the open state to the closed state. The engagement relationship between the locking part 41 and the other locking groove 61 in the closed state can also be found in [reference needed]. Figure 11 Of course, in the open or closed state, to facilitate pressing the button 4, the elastic element 5 may exert a relatively small elastic force on the button 4, that is, the elastic element 5 may not fully return to its natural state. In some embodiments, the elastic element 5 may also fully return to its natural state.

[0064] Switching from the retracted state to the open state: The coordination relationship between the components during the switching from the retracted state to the open state is the same as that during the switching from the open state to the retracted state. It is the reverse process. The only difference is that the lamp arm 6 is rotated in the direction of arrow R at this time. This will not be described again.

[0065] As described above, with the locking part 41 located within the locking groove 61, the lamp arm 6 is only unlocked by pressing the button 4. After unlocking, rotating the lamp arm 6 allows switching between the open and retracted states, thus facilitating easy opening and closing and improving the camera's usability. Furthermore, the ability to switch between the open and retracted states only after unlocking the lamp arm 6 ensures it remains secure in either position, further enhancing usability and preventing it from being stuck in an intermediate state between open and retracted due to loosening. Finally, at least one mating surface of the locking part 41 and the corresponding locking groove 61 is an inclined surface, enabling high-precision positioning between the locking part 41 and the locking groove 61, thereby achieving high-precision positioning of the lamp arm 6 to the open or retracted state.

[0066] The camera includes at least one of the following features:

[0067] a) See Figure 6 The width of the locking part 41 (the width between the opposite locking part sides 411) gradually decreases along the direction in which the locking part 41 enters the locking groove 61; Figure 6 The diagram illustrates a gradual decrease along the y-direction of the arrow. Correspondingly, based on the inclined surface fit, the width of the locking groove 61 (the width between the opposing locking groove sides 611) also gradually decreases along the y-direction of the arrow.

[0068] As described above, since the width of the locking part 41 and the width of the locking groove 61 both gradually decrease along the direction in which the locking part 41 enters the locking groove 61, the gap between the side 411 of the locking part and the side 611 of the locking groove becomes smaller and smaller as the locking part 411 enters the locking groove 61. As a result, the positioning is accurate, and the lamp arm 6 can be opened or closed in place, thus being in the closed or opened state more effectively.

[0069] b) See Figure 1 When the lamp arm 6 is in the open state, the vertical distance between the fill light 7 and the optical axis of the camera lens 12 is d, where d ≥ 300 mm. In this embodiment, the lamp arm 6 is perpendicular to the optical axis when in the open state; therefore, the distance d can be understood as the distance along the lamp arm 6. When there are multiple fill lights 7, the distance is the vertical distance between the nearest fill light 7 and the optical axis of the lens 12.

[0070] With the above settings, d≥300mm, the distance between the supplementary light 7 and the lens 12 is relatively far, and the image is less likely to be reflected back by rain, dust, fog, etc. due to the light emitted by the supplementary light 7 itself. Consequently, the problem of white screen and image failure is less likely to occur.

[0071] c) See also Figure 6 and Figure 10The camera body 1 has guide grooves 13 evenly distributed around the button in the circumference; the button 4 has guide parts 42 evenly distributed around the circumference, and the guide parts 42 are located in the guide grooves 13 one by one, and one of the guide parts 42 is integrally constructed with the locking part 41. Figure 6 and Figure 10 The diagram illustrates three guide sections 42 and three guide grooves 13, with adjacent guide sections 42 and adjacent guide grooves 13 arranged at 120-degree angles. However, the number of guide sections 42 and guide grooves 13 is not limited to this.

[0072] As described above, the guide portion 42 and guide groove 13 are evenly distributed, and the guiding effect generated by the cooperation of the guide portion 42 and guide groove 13 allows the button 4 to enter the locking groove 61 along the depth direction of the locking groove 61 under the action of the elastic member 5, achieving a precise fit between the locking portion 41 and the locking groove 61, and the button 4 is not easily shaken. Furthermore, one of the guide portions 42 is integrally constructed with the locking portion 41, and the side 411 of the locking portion cooperates with the side 611 of the locking groove, which also plays a guiding role. This is equivalent to having a longer stroke to guide the button 4, thus making the fit between the locking portion 41 and the locking groove 61 more precise.

[0073] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A video camera characterized by comprising: The camera includes a camera body and a blower assembly, wherein: The camera body includes a viewing window, and the viewing window includes an outer surface of the viewing window located outside the camera; The blowing assembly includes a fan, a filter assembly, and an air outlet channel. The fan is disposed around the periphery of the window. The filter assembly can filter the air blown toward the window. The air outlet channel includes an air outlet section that extends in a direction parallel to the outer surface of the window, so that the air generated by the fan blows toward the outer surface of the window. The air outlet channel includes an air guide cavity, which includes an air cavity inlet and an air cavity outlet. The air cavity inlet is directly opposite the air outlet of the fan. The cross-sectional area of ​​the air guide cavity gradually decreases along the direction from the air cavity inlet to the air cavity outlet until it is equal to the cross-sectional area of ​​the air outlet section.

2. The camera of claim 1, wherein, The blowing assembly includes at least one of the following features: a) The fan is a fan, the fan's shaft is parallel to the outer surface of the window, and the air outlet channel is a straight channel; b) The fan is a frameless fan, including a blade frame and blades located within the blade frame, wherein the blade frame and the blades rotate synchronously; c) The blower assembly is located on the top of the camera body so that the air generated by the fan blows from the top edge to the bottom edge of the outer surface of the viewing window.

3. The camera of claim 1, wherein, The outlet of the air outlet section is provided with an air guide wall; the inner wall of the air guide wall is inclined at an acute angle toward the outer surface of the window, so that the air generated by the fan blows toward the outer surface of the window.

4. The camera of claim 3, wherein, The angle at which the inner wall surface is inclined toward the outer surface of the window is α, where 10 degrees ≤ α ≤ 40 degrees.

5. The camera of claim 1, wherein, With the side where the subject is located as the front of the camera, the viewing window is tilted towards the front of the camera body, and the angle between it and the reference surface is an acute angle. The reference surface is perpendicular to the optical axis of the camera lens.

6. The camera of claim 5, wherein, The angle between the view window and the reference plane is b, where 15 degrees ≤ b ≤ 40 degrees.

7. The camera of claim 1, wherein, The blower assembly is located on the top of the camera body, with the side where the subject is located as the front of the camera, and the blower assembly protrudes forward toward the viewport.

8. The camera of claim 1, wherein, The camera includes a button and an elastic element, the button including a locking part; the camera includes a light arm and a fill light mounted on the light arm; the light arm is provided with spaced locking grooves; the light arm can rotate around the camera body to have an open state and a retracted state; In the open state and the closed state, the locking part is located in different locking grooves under the action of the elastic member, and at least one mating surface of the locking part that mates with the corresponding locking groove is an inclined surface.

9. The camera of claim 8, wherein, The camera includes at least one of the following features: a) The width of the locking part and the width of the locking groove both gradually decrease along the direction in which the locking part enters the locking groove; b) When the lamp arm is in the open state, the vertical distance between the fill light and the optical axis of the camera lens is d, where d ≥ 300 mm; c) The camera body has guide grooves evenly distributed around the button in the circumference; the button has guide parts evenly distributed in the circumference, the guide parts are located in the guide grooves one by one, and one of the guide parts is integrally constructed with the locking part.

Images