Shading device, image acquisition equipment and transport carrier

Abstract

The utility model relates to a shading device, image acquisition equipment and a transportation carrier, the shading device is applied to the image acquisition equipment with a camera, and the image acquisition equipment is applied to the transportation carrier. The shading device comprises a shading cover; the light shield comprises a mounting part and a light shielding part; the mounting part is used for being mounted to a camera, a lighting through hole is formed in the mounting part and penetrates through the two opposite ends of the mounting part, and a hole axis of the lighting through hole is suitable for being coaxially arranged with an optical axis of the camera; the shading part comprises two shading petals, and the two shading petals are connected to the same end of the mounting part and distributed on the periphery of the lighting through hole at intervals; the inner diameter of the side, away from the installation part, of the reflection part is larger than the inner diameter of the side, close to the installation part, of the reflection part. The shading device provided by the embodiment of the utility model can effectively and multiply block stray light, and can ensure the light inlet amount of the shading cover and the photographing effect of the camera.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and in particular to a shading device, an image acquisition device, and a transport vehicle. Background Art

[0002] When a camera is shooting, stray light can enter the lens, affecting the camera's photographic quality. Therefore, cameras often install lens hoods in front of the lens to reduce the impact of stray light on the photographic quality and reduce the probability of ghosting and glare in the photographic works.

[0003] Existing lens hoods are usually cylindrical and installed in front of the lens to block stray light from the side of the lens. However, while such lens hoods reduce stray light, they also significantly reduce the amount of light entering the lens, affecting the camera's photography effect. Utility Model Content

[0004] The present application provides a shading device, an image acquisition device, and a transport vehicle.

[0005] In the first aspect, the present application provides a shading device, which is applied to an image acquisition device with a camera, and the shading device includes a shading hood; the shading hood includes a mounting portion and a shading portion; the mounting portion is used to be mounted to the camera, and the mounting portion is provided with a light-collecting hole, which passes through the opposite ends of the mounting portion, and the hole axis of the light-collecting hole is suitable for being coaxially arranged with the optical axis of the camera; the shading portion includes two light-collecting petals, which are respectively connected to the same end of the mounting portion and are spaced apart on the periphery of the light-collecting hole; a reflecting portion is provided on the side of the light-collecting petal facing the light-collecting hole, and the inner diameter of the reflecting portion away from the mounting portion is larger than the inner diameter of the reflecting portion close to the mounting portion.

[0006] In some optional embodiments, the inner diameter of the reflecting portion gradually decreases in the direction from the shading portion to the mounting portion.

[0007] In some optional embodiments, the reflective portion includes a plurality of reflective steps, and the plurality of reflective steps are sequentially arranged along the extension direction of the hole axis.

[0008] Among them, in some optional embodiments, the surfaces of two adjacent reflective steps on each shading petal are continuously connected; and / or each reflective step is an annular structure or an arc structure coaxial with the light-transmitting hole; and / or the surface of each reflective step is a matte surface.

[0009] In some optional embodiments, each reflective step includes a first reflective surface and a second reflective surface connected in series; the first reflective surface is a plane facing away from the mounting portion, and the first reflective surface is perpendicular to the hole axis; the second reflective surface is an inner cylindrical surface or conical surface coaxial with the light-transmitting hole.

[0010] In some optional embodiments, the two light-shielding petals are respectively located on both sides of the first reference plane and are spaced apart, the two light-shielding petals are mirror-symmetrical about the first reference plane, and the first reference plane passes through the hole axis.

[0011] Among them, in some optional embodiments, two shading petals are distributed around the periphery of the light-transmitting hole, and adjacent parts of the two shading petals define two gaps, which are respectively located on both sides of the second reference plane. The two gaps are asymmetrical about the second reference plane, and the second reference plane passes through the hole axis and is perpendicular to the first reference plane.

[0012] In some optional embodiments, each shading petal has a first side surface, the first side surfaces of the two shading petals are located on the same side of the shading portion, the first side surfaces of the two shading petals are coplanar and constitute a first lighting plane, and the first lighting plane intersects with the hole axis.

[0013] In some optional embodiments, each light-shielding petal has a second side surface, the first side surface and the second side surface are respectively located on opposite sides of the light-shielding cover, and each second side surface intersects with the hole axis of the light-shielding cover.

[0014] Among them, in some optional embodiments, the two second side surfaces are both planes, the two second side surfaces are coplanar and constitute a second lighting plane, and the second lighting plane intersects with the hole axis; and / or the two second side surfaces are both curved surfaces, and the two second side surfaces are smoothly connected.

[0015] Among them, in some optional embodiments, the shading device also includes a light blocking screen, which is provided with a light blocking space and a light-transmitting through hole connected to the light blocking space. The light hood is installed on the light blocking screen and is located in the light blocking space, and the light-collecting through hole is connected to the light-transmitting through hole.

[0016] Among them, in some optional embodiments, the light-blocking screen includes a connecting part and two first light-blocking parts, the two first light-blocking parts are respectively connected to the two ends of the connecting part and are arranged relatively spaced apart, and the light-blocking space is located between the two first light-blocking parts; the light-transmitting through hole is provided in the connecting part, the mounting part is connected to the connecting part, and the arrangement direction of the two light-blocking petals of the light-shielding cover is the same as the parallel direction of the two first light-blocking parts.

[0017] In some optional embodiments, each first light blocking portion has a connecting end and an extending end, the connecting end is connected to the connecting portion, and the extending end extends in a direction away from the connecting portion; the distance between the connecting ends of the two first light blocking portions is smaller than the distance between the extending ends of the two first light blocking portions.

[0018] Among them, in some optional embodiments, the light-blocking screen also includes a second light-blocking portion, which is located between the two first light-blocking portions and connected to the connecting portion and the two first light-blocking portions. The light-shielding cover is spaced apart from the second light-blocking portion, and there is a gap between the two light-blocking petals, which is opposite to the second light-blocking portion.

[0019] Among them, in some optional embodiments, the shading device includes at least two shading covers, at least two shading covers are arranged at intervals on the connecting part, and the hole axes of at least two shading covers are parallel; each shading part has a length dimension along the extension direction of the hole axis, and the length dimensions of the shading parts of at least two shading covers are different.

[0020] In a second aspect, the present application provides an image acquisition device, which includes a camera and the shading device mentioned above. The camera has an optical axis, the shading device is installed on the camera, and the hole axis of the light-collecting hole is coaxially arranged with the optical axis of the camera.

[0021] In a third aspect, the present application provides a transport vehicle, which includes a vehicle body and the image acquisition device mentioned above, and the image acquisition device is installed on the vehicle body.

[0022] The present application provides a light-shielding device, which includes a light-shielding cover, the light-shielding cover includes a mounting portion and a light-shielding portion connected to each other, the mounting portion is provided with a light-collecting hole and is arranged around the periphery of the camera, the light-shielding portion includes two light-shielding petals, the two light-shielding petals can prevent stray light from propagating between the two light-shielding petals and into the light-collecting hole, and the light-shielding petals are further provided with a reflecting portion on the side facing the light-collecting hole, the reflecting portion has a reflective effect on stray light entering between the two light-shielding petals and guides the stray light to be transmitted in a direction away from the camera, thereby preventing a large amount of stray light from being transmitted to the camera, preventing the stray light from affecting the camera's shooting effect, and ensuring the clarity of the image. Therefore, the light-shielding device provided in this embodiment can effectively and multiple-foldly prevent stray light from being transmitted to the camera, has a good light-shielding effect, can effectively reduce the interference of stray light on the camera, and the two light-shielding petals are arranged at intervals to ensure the amount of light entering, thereby ensuring the camera's shooting effect, reducing the probability of ghosting, glare and light spots in the pictures captured by the camera, and also ensuring the brightness of the pictures. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 It is a structural schematic diagram of the transport vehicle provided in an embodiment of the present application.

[0025] Figure 2 It is a structural diagram of the image acquisition device provided in this embodiment.

[0026] Figure 3 Schematic diagram of the structure of the light shield of the light shielding device provided in this embodiment.

[0027] Figure 4 It is a simulation Figure 3 The structure diagram of the light shield reflecting stray light in the optical environment is shown.

[0028] Figure 5 yes Figure 3 A cross-sectional view of a first embodiment of the reflective portion of the sunshade is shown.

[0029] Figure 6 yes Figure 3 A cross-sectional view of a second embodiment of the reflective portion of the sunshade is shown.

[0030] Figure 7 It is a simulation Figure 5 The schematic diagram of the structure of the reflective step reflecting stray light in an optical environment is shown.

[0031] Figure 8 It is a simulation Figure 3 Schematic diagram of the structure of the light shield reflecting stray light.

[0032] Figure 9 yes Figure 3 The structure diagram of the light shield shown is mirror-symmetrical about the first reference plane.

[0033] Figure 10 yes Figure 3 The schematic diagram of the structure of the light shield is asymmetric about the second reference plane.

[0034] Figure 11 yes Figure 3 A schematic structural diagram of the first side surface and the second side surface of the light shielding portion of the light shield is shown.

[0035] Figure 12 yes Figure 3 The diagram shows the structure of the light blocking screen and the light shield in the shading device.

[0036] Figure 13 yes Figure 2 The image acquisition device shown is a structural schematic diagram of two light shields installed.

[0037] Figure numbers: 1000, transport vehicle, 900, vehicle body, 100, image acquisition device, 10, camera, 20, shading device, 21, shading hood, 211, mounting portion, 2111, light-collecting hole, 212, shading portion, 2121, shading petal, 2122, reflecting portion, 2123, reflecting step, 2124, first reflecting surface, 2125, second reflecting surface, 2126, first side surface, 2127, second side surface, 213, notch, 22, light-blocking screen, 221, first light-blocking portion, 2211, connecting end, 2212, extending end, 222, second light-blocking portion, 223, connecting portion, 224, light-blocking space. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1 and Figure 2 , an embodiment of the present application provides a shading device 20 and an image acquisition device 100 equipped with the shading device 20, and also provides a transport vehicle 1000 equipped with the image acquisition device 100. The transport vehicle 1000 may include an aircraft, a vehicle, a ship, and the like. Taking a vehicle as an example in this embodiment, the vehicle may include a vehicle body 900, and the vehicle body 900 is provided with a cockpit for a driver or a passenger to ride. A central control screen is integrated on the vehicle body 900, and the central control screen is used to interact with the driver or the passenger. The central control screen is used to display images of the vehicle's surroundings so that the driver can understand the situation inside and outside the vehicle. The driver can select instructions on the central control screen to change the state of the vehicle or the environment in the cockpit.

[0040] See also Figure 1 and Figure 2 In this embodiment, the image capture device 100 is mounted on the vehicle body 900 to capture images of the surrounding environment of the transport vehicle 1000. The image capture device 100 is directly or indirectly connected to the central control screen mentioned above, so that images captured by the image capture device 100 are displayed on the central control screen for the driver to view. As an example, the image capture device 100 can be installed at the front side of the transport vehicle 1000 to display the road conditions in front of the vehicle on the central control screen; the image capture device 100 can also be installed at the rear side of the vehicle to display the status of vehicles following behind the vehicle on the central control screen.

[0041] See also Figure 2 and Figure 3 In this embodiment, the image acquisition device 100 includes a camera 10 and the aforementioned light shielding device 20. The camera 10 is used to capture the environment around the vehicle to obtain an image. The light shielding device 20 is installed on the camera 10. The light shielding device 20 is used to block stray light to reduce stray light entering the camera 10 and improve ghosting or glare in the image captured by the camera 10. Therefore, the appearance of light spots on the image is reduced to a certain extent, ensuring a clear image with high color uniformity, which helps the driver to judge the environment around the vehicle based on the image.

[0042] See also Figure 3 Next, the shading device 20 provided by the present application will be introduced. The shading device 20 includes a light shield 21, which is used to be installed on the camera 10. Specifically, the light shield 21 in this embodiment includes a mounting portion 211 and a light shielding portion 212, and the mounting portion 211 and the light shielding portion 212 are connected to each other. As an example, the mounting portion 211 and the light shielding portion 212 are integrally formed, for example, the two can be connected by injection molding. The mounting portion 211 in this embodiment is roughly annular in structure, and the mounting portion 211 is provided with a light-transmitting through hole 2111, and the light-transmitting through hole 2111 is provided at opposite ends of the mounting portion 211. The mounting portion 211 is used to be installed on the camera 10, for example, it can be installed on the camera 10 by a threaded connection structure or a snap-on structure. When the mounting portion 211 is installed on the camera 10, the mounting portion 211 is arranged around the periphery of the lens of the camera 10 to improve the stability of the connection between the light shield 21 and the camera 10.

[0043] See also Figure 3 and Figure 4 In this embodiment, the light shielding portion 212 includes two light shielding flaps 2121, which are respectively connected to the same end of the mounting portion 211 and spaced apart around the periphery of the light-transmitting through-hole 2111. The light shielding flaps 2121 protrude relative to the mounting portion 211 in a direction away from the camera 10. The light shielding flaps 2121 are located on the propagation path of stray light and have a reflective effect on the stray light, so that the stray light is reflected by the light shielding flaps 2121, thereby reducing the stray light that propagates to the light-transmitting through-hole 2111 and is conducted to the camera 10. In this embodiment, the hole axis L of the light-transmitting through-hole 2111 is coaxially arranged with the optical axis of the camera 10 (not marked in the figure, please refer to the hole axis L), so that the light shield 21 effectively blocks stray light for the camera 10, reduces the stray light at the center of the camera 10, and ensures that the center of the image captured by the camera 10 is clearer and has higher recognition.

[0044] In this embodiment, a reflective portion 2122 is provided on the side of each light-shielding petal 2121 facing the light-transmitting aperture 2111. The reflective portion 2122 is configured to reflect stray light that enters between the two light-shielding petals 2121. This stray light is transmitted to the reflective portion 2122 and, under the reflection effect of the reflective portion 2122, is transmitted out of the light-shielding portion 212 in a direction away from the camera 10. In this embodiment, the reflective portion 2122 is arranged at an angle relative to the hole axis L of the light-transmitting aperture 2111. The inner diameter D1 of the reflective portion 2122 on the side away from the mounting portion 211 is larger than the inner diameter D2 of the reflective portion 2122 on the side closer to the mounting portion 211, thereby resulting in the light-shielding portion 212 having an outwardly flared structure relative to the light-transmitting aperture 2111. In actual application scenarios, some frontal stray light transmitted along the hole axis L is transmitted to the light shield 21. Some of this frontal stray light is transmitted to the inclined reflective portion 2122. The reflective portion 2122 can reflect this part of the stray light and transmit it in a direction away from the camera 10, thereby improving the effect of the light shield 21 in shielding the camera 10 from stray light. Under the arrangement of this embodiment, a large amount of stray light is reflected by the reflective portion 2122 and transmitted in a direction away from the camera 10. While the reflective portion 2122 reflects the frontal stray light, the light shield 21 also allows some frontal ambient light to enter the light shield 21 and the camera 10, ensuring sufficient brightness and high imaging quality.

[0045] In summary, the shading device 20 in this embodiment includes a shading cover 21, which includes a mounting portion 211 and a shading portion 212 connected to each other. The mounting portion 211 is provided with a light-transmitting hole 2111 and is arranged around the periphery of the camera 10. The shading portion 212 includes two shading petals 2121. The two shading petals 2121 can prevent stray light from propagating between the two shading petals 2121 and into the light-transmitting hole 2111. The shading petal 2121 is further provided with a reflecting portion 2122 on the side facing the light-transmitting hole 2111. The reflecting portion 2122 has a reflective effect on the stray light entering between the two shading petals 2121 and guides the stray light to be transmitted in a direction away from the camera 10, thereby avoiding more stray light from being transmitted to the camera 10, avoiding stray light from affecting the shooting effect of the camera 10, and ensuring the clarity of the image. Therefore, the shading device 20 provided in this embodiment can effectively and multiplexly block stray light from being transmitted to the camera 10. The shading effect is good and can effectively reduce the interference of stray light on the camera 10. The two shading petals 2121 are arranged at intervals to ensure the amount of light entering, so as to ensure the shooting effect of the camera 10, reduce the probability of ghosting, glare and light spots in the pictures obtained by the camera 10, and also ensure the brightness of the pictures.

[0046] See also Figure 5 and Figure 6 In some embodiments, the inner diameter of the reflecting portion 2122 gradually decreases along the direction from the light shielding portion 212 to the mounting portion 211. Figure 6In the illustrated embodiment, the reflective portion 2122 has an overall conical structure. In this embodiment, the inclination of the reflective portion 2122 is relatively stable, so that each portion of the reflective portion 2122 in the direction from the light shielding portion 212 to the mounting portion 211 has the same reflective effect on stray light and guides the stray light away from the camera 10.

[0047] In the embodiment provided in this application, the reflective portion 2122 may have various shapes, such as a conical surface, a pyramidal surface, a rough curved surface, etc. Figure 3 and Figure 5 In this embodiment, the reflective portion 2122 of each light-shielding petal 2121 includes a plurality of reflective steps 2123. The reflective steps 2123 on each light-shielding petal 2121 are sequentially arranged along the axial direction of the light-transmitting aperture 2111. In this embodiment, the surfaces of two adjacent reflective steps 2123 on each light-shielding petal 2121 are continuously connected, providing continuity across the reflective portion 2122 and ensuring its effective reflection of stray light. In some embodiments, the reflective steps 2123 have a matte finish, which provides excellent reflection of stray light and further enhances the reflective effect of the reflective portion 2122.

[0048] See also Figure 3 and Figure 5 In this embodiment, each reflective step 2123 has an arcuate structure coaxial with the light-transmitting hole 2111. That is, the stepped structure of each reflective step 2123 is roughly a portion of the annular structure (coaxial with the light-transmitting hole 2111) in the circumferential direction. In some embodiments, two light-shielding petals 2121 spaced apart from each other are each provided with multiple reflective steps 2123. A reflective step 2123 on one light-shielding petal 2121 and a reflective step 2123 on the other light-shielding petal 2121 are two circumferential portions of the same annular structure (coaxial with the light-transmitting hole 2111). In some embodiments, the two light-shielding petals 2121 are connected toward the side of the mounting portion 211, so that the light-shielding portion 212 has an annular structure. In this embodiment, a reflective step 2123 on one light-shielding petal 2121 smoothly connects with a reflective step 2123 on the other light-shielding petal 2121 to form a complete annular structure, and the annular structure is coaxial with the light-transmitting hole 2111. In the configuration of this embodiment, the reflective step 2123 has a certain curvature, so that the reflective step 2123 can reflect stray light in multiple directions or angles, thereby improving the reflective effect of the reflective step 2123 on stray light.

[0049] See also Figure 7 and Figure 8Each reflective step 2123 has a first reflective surface 2124 and a second reflective surface 2125 connected in series. The first reflective surface 2124 is a plane facing away from the mounting portion 211 and is substantially perpendicular to the hole axis L of the light-transmitting hole 2111. The second reflective surface 2125 is an inner cylindrical surface or a conical surface with the hole axis L as the axis. Figure 7 In actual applications, stray light traveling along the aperture axis L, as well as stray light traveling in other directions, may be transmitted to the first reflective surface 2124 of a reflective step 2123, where it is reflected by the first reflective surface 2124 and transmitted away from the camera 10. Some stray light may also be transmitted to the second reflective surface 2125 of a reflective step 2123, where it is reflected by the second reflective surface 2125 and transmitted to the first reflective surface 2124 of an adjacent reflective step 2123. This stray light may then be reflected by the first reflective surface 2124 of the adjacent reflective step 2123, where it is then transmitted away from the camera 10. Therefore, this embodiment significantly reduces stray light traveling to the camera 10, significantly minimizing interference from stray light on the camera 10. It also allows ambient light from the front to enter the light shield 21 and the camera 10, ensuring sufficient brightness and high image quality. In other embodiments, the relationship between the first reflective surface 2124 and the aperture axis L can be selected based on the vehicle's environment. As an example, the first reflective surface 2124 may not be perpendicular to the hole axis L but may be close to perpendicular.

[0050] See also Figure 8 and Figure 9 In this embodiment, a first reference plane (not shown in the figure) is defined based on the hole axis L of the light-transmitting hole 2111. The first reference plane passes through the hole axis L. The two light-shielding petals 2121 are respectively located on both sides of the first reference plane and are arranged at relative intervals. The two light-shielding petals 2121 are mirror-symmetrical about the first reference plane. The setting of this embodiment is conducive to the production of the light-shielding hood 21 and makes the light-shielding hood 21 have a certain symmetrical beauty. The two light-shielding petals 2121 have similar reflection effects on stray light, which can ensure uniform light at the camera 10 and ensure the shooting effect. As an example, the light-shielding petals 2121 are formed by cutting on a complete cylindrical structure, and the setting of this embodiment can reduce the cutting steps. As another example, the light-shielding hood 21 is directly molded by injection molding, and the setting of this embodiment can simplify the modeling steps and simplify the structure of the mold, reduce costs, and improve production efficiency.

[0051] See also Figure 10As previously mentioned, each light-shielding flap 2121 has a certain curvature with the hole axis L as its axis. Therefore, the two light-shielding flaps 2121 are distributed around the periphery of the light-collecting hole 2111 and define two notches 213. The two notches 213 are spaced apart and arranged opposite each other, allowing effective light (light of the target object) to be transmitted through the notches 213 to the light-collecting hole 2111 and the camera 10. A second reference plane BB is defined based on the first reference plane and the hole axis L of the light-collecting hole 2111. The second reference plane BB is perpendicular to the first reference plane and passes through the hole axis L. In this embodiment, the two notches 213 are located on either side of the second reference plane BB and are asymmetric with respect to the second reference plane B.

[0052] As previously mentioned, the light-shielding flap 2121 in this embodiment intersects the second reference plane BB and is asymmetric with respect to the second reference plane B. Specifically, the light-shielding flap 2121 is asymmetric on its left and right sides along its circumference. Consequently, the two sides of the light-shielding flap 2121 exhibit varying degrees of stray light shielding and reflection. Because the two light-shielding flaps 2121 are mirror-symmetric about the first reference plane, in practical applications, the light shield 21 can be rotated 180° about the aperture axis L to switch the relative positions of the two sides of the light-shielding flap 2121 in the application environment, adapting to varying optical environments and expanding the applicability of the light shield 21. In this embodiment, the two notches 213 have different shapes and differ in their minimum distances from the mounting portion 211. Consequently, the two notches 213 exhibit varying rates of effective light transmission. In actual application scenarios, the light shield 21 can be rotated 180° around the hole axis L to switch the relative position relationship of the two notches 213 in the application environment to cope with different optical environments and expand the application range of the light shield 21.

[0053] See also Figure 11In this embodiment, each light-shielding petal 2121 has a first side surface 2126 along its circumference. The first side surfaces 2126 of the two light-shielding petals 2121 are located on the same side of the light-shielding cover 21, that is, the two first side surfaces 2126 are located on the same side of the second reference plane B. In this embodiment, the side of each first side surface 2126 facing away from the mounting portion 211 is tilted toward the second reference plane B. That is, the first side surfaces 2126 are inclined relative to the hole axis L or the second reference plane B. The cross-section of each first side surface 2126 intersects the hole axis L of the light-transmitting hole 2111. In this embodiment, both first side surfaces 2126 are planar, and the planar first side surfaces 2126 intersect the hole axis L of the light-transmitting hole 2111. The two first side surfaces 2126 are coplanar and form a first light-transmitting plane (not shown in the figure), which intersects the hole axis L. In other embodiments, the two first side surfaces 2126 may both be curved surfaces, and the two first side surfaces 2126 may be smoothly connected to form a first lighting curved surface, which intersects the hole axis L. In other embodiments, the two first side surfaces 2126 may not be coplanar.

[0054] In this embodiment, each light-shielding petal 2121 has a second side surface 2127. The first side surface 2126 and the second side surface 2127 of each light-shielding petal 2121 are located on the left and right sides of the light-shielding petal 2121, respectively, along its circumference. The second side surfaces 2127 of the two light-shielding petals 2121 are located on the same side of the light shield 21; that is, the two second side surfaces 2127 are located on the same side of the light shield 21. In other words, the two second side surfaces 2127 are located on the same side of the light shield 21. In this embodiment, the side of each second side surface 2127 facing away from the mounting portion 211 is tilted toward the second reference plane B. In other words, the second side surfaces 2127 are inclined relative to the hole axis L or the second reference plane B. Therefore, the cross-section of each second side surface 2127 intersects the hole axis L of the light-transmitting aperture 2111. In this embodiment, both second side surfaces 2127 are curved surfaces. The two second side surfaces 2127 are coplanar and smoothly connected to form a second light-transmitting curved surface (not shown), which intersects the hole axis L. In some embodiments, the two second side surfaces 2127 are coplanar but spaced apart. In other embodiments, the two second side surfaces 2127 are both planes, and the two second side surfaces 2127 are coplanar and constitute a second lighting plane, which intersects the hole axis L. In other embodiments, the two second side surfaces 2127 may not be coplanar.

[0055] Therefore, under the setting of this embodiment, the light shield 21 has a first lighting plane and a second lighting curved surface that are relatively set, and the first lighting plane and the second lighting curved surface correspond one-to-one to the two notches 213, so that the user can judge the pass rate of the two lighting surfaces (two notches 213) for effective light according to the shapes of the first lighting plane and the second lighting curved surface, so as to adjust the posture of the light shield 21 according to the actual optical environment.

[0056] See also Figure 12 In some embodiments, the light-shielding device 20 further includes a light-blocking screen 22, which roughly covers a partial periphery of the light-shielding cover 21 to shield the light-shielding cover 21 and reflect some stray light before the light-shielding cover 21. Specifically, the light-blocking screen 22 in this embodiment has a light-blocking space 224, and the light-shielding cover 21 is arranged in the light-blocking space 224 and is connected to the light-blocking screen 22. The light-blocking screen 22 is provided with a light-transmitting through hole at the connection with the light-shielding cover 21, and the light-transmitting through hole is connected to the light-collecting through hole 2111 of the light-collecting cover 21 and is coaxially arranged. In this embodiment, the light-blocking screen 22 is mounted on the camera 10. When the light-blocking screen 22 is mounted on the camera 10, the camera 10 is sequentially penetrated by the light-transmitting through hole and the light-collecting through hole 2111 and is exposed through the light-collecting through hole 2111.

[0057] In this embodiment, the light shield 21 is arranged in the light blocking space 224 defined by the light blocking screen 22, which can keep the camera 10 and the light shield 21 clean. For example, the light blocking screen 22 can prevent dust from adhering to the camera 10 or the light shield 21, or prevent water droplets from dripping or splashing onto the camera 10 or the light shield 21. It can also prevent the light shield 21 or the camera 10 from colliding with foreign objects, and can also block more stray light for the light shield 21, preventing more stray light from being transmitted to the light shield 21, thereby greatly reducing the stray light transmitted to the camera 10.

[0058] In this embodiment, the light-blocking screen 22 includes a connecting portion 223 and two first light-blocking portions 221. The two first light-blocking portions 221 are arranged at intervals and are respectively connected to the two ends of the connecting portion 223. The two first light-blocking portions 221 extend toward the same side of the connecting portion 223 relative to the connecting portion 223, so that the light-blocking screen 22 has a more three-dimensional structure. In this embodiment, the two first light-blocking portions 221 participate in defining a light-blocking space 224, and the light-blocking space 224 is located between the two first light-blocking portions 221. A light-transmitting through hole is provided on the connecting portion 223, the light-shielding hood 21 is provided on the connecting portion 223, and the light-transmitting through hole 2111 is connected to the light-transmitting through hole, and the camera 10 is sequentially passed through the connecting portion 223 and the mounting portion 211 and exposed. In this embodiment, the connecting portion 223 and the light-shielding hood 21 are integrally formed to improve the structural stability of the light-shielding device 20. In other embodiments, the light shield 21 is rotatably connected to the connecting portion 223 about the hole axis L of the light-transmitting hole 2111. In this embodiment, the light shield 21 is located between the two first light-blocking portions 221. The arrangement direction of the two light-blocking petals 2121 of the light shield 21 is the same as the arrangement direction of the two first light-blocking portions 221, so that the two first light-blocking portions 221 effectively block more stray light for the light-blocking petals 2121 and the light shield 21. In addition, the first light-blocking portions 221 are not opposite to the notch 213, so that the two first light-blocking portions 221 do not affect the lighting of the notch 213.

[0059] In this embodiment, the light-blocking screen 22 further includes a second light-blocking portion 222, which is located between the two first light-blocking portions 221 and connected to the connecting portion 223 and the two first light-blocking portions 221. The second light-blocking portion 222 and the two first light-blocking portions 221 jointly define a light-blocking space 224. In this embodiment, the light-shielding cover 21 is spaced apart from the second light-blocking portion 222, and one of the two notches 213 of the light-shielding cover 21 is spaced apart from the second light-blocking portion 222. The second light-blocking portion 222 can prevent stray light from being transmitted through the notch 213 to the light-collecting hole 2111 and the camera 10, and can also effectively shield dust and rain and protect the structure of the camera 10, making it suitable for a camera 10 that is permanently placed outside the cockpit and the vehicle body 900.

[0060] In this embodiment, each first light blocking portion 221 has a connecting end 2211 and an extending end 2212, wherein the connecting end 2211 is connected to the connecting portion 223, and the extending end 2212 extends in a direction away from the connecting portion 223. The distance between the two connecting ends 2211 is smaller than the distance between the two extending ends 2212. Therefore, roughly in the direction in which the mounting portion 211 points to the light blocking portion 212, the distance between the two first light blocking portions 221 becomes increasingly farther. In this embodiment, the two first light blocking portions are inclined relative to the hole axis L of the light-transmitting through hole 2111, and the degree of inclination of the two first light blocking portions 221 can be the same or different.

[0061] See also Figure 12 and Figure 13 In this embodiment, the light shielding device 20 includes at least two light shields 21, which are spaced apart and disposed on the connecting portion 223. The two light shielding petals 2121 of each light shield 21 are arranged in the same direction as the two first light blocking portions 221, and the aperture axes L of the two light shields 21 are parallel. In embodiments with at least two light shields 21, the dimensions of the light shields 21 are specifically configured based on factors such as the shape of the camera 10 and photographic requirements. Specifically, in this embodiment, the light shielding portion 212 of each light shield 21 has a length dimension along the direction extending from the aperture axis L, which should be understood as the maximum dimension of the light shielding portion 212 along the direction extending from the aperture axis L. In this embodiment, the light shielding portions 212 of the at least two light shields 21 have different length dimensions to capture scenes with different fields of view. In other embodiments, the mounting portions 211 of the at least two light shields 21 have different dimensions along the direction extending from the aperture axis L to accommodate cameras 10 with different FOVs. In other embodiments, the outer diameters or inner diameters of the light shielding portions 212 of at least two light shields 21 are different, or the outer diameters or inner diameters of the mounting portions 211 of at least two light shields 21 are different.

[0062] In summary, this embodiment provides a shading device 20, which includes a shading cover 21. The shading cover 21 includes a mounting portion 211 and a shading portion 212 connected to each other. The mounting portion 211 is provided with a light-transmitting hole 2111 and is arranged around the periphery of the camera 10. The shading portion 212 includes two shading petals 2121. The two shading petals 2121 can prevent stray light from propagating between the two shading petals 2121 and into the light-transmitting hole 2111. A reflecting portion 2122 is further provided on the side of the shading petal 2121 facing the light-transmitting hole 2111. The reflecting portion 2122 has a reflective effect on the stray light entering between the two shading petals 2121 and guides the stray light to be transmitted in a direction away from the camera 10, thereby avoiding more stray light from being transmitted to the camera 10, avoiding stray light from affecting the shooting effect of the camera 10, and ensuring the clarity of the image. Therefore, the shading device 20 provided in this embodiment can effectively and multiplexly block stray light from being transmitted to the camera 10. The shading effect is good and can effectively reduce the interference of stray light on the camera 10. The two shading petals 2121 are arranged at intervals to ensure the amount of light entering, so as to ensure the shooting effect of the camera 10, reduce the probability of ghosting, glare and light spots in the pictures obtained by the camera 10, and also ensure the brightness of the pictures.

[0063] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term and should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0064] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only used to simplify the description for the convenience of describing this application, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0065] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, these terms may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; internal communication between two components; or mere surface contact. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A shading device, characterized in that: The shading device is applied to an image acquisition device having a camera, and the shading device includes a light shield; The light shield comprises a mounting portion and a light shielding portion; The mounting portion is used to be mounted on the camera, and the mounting portion is provided with a light-collecting through-hole, which passes through opposite ends of the mounting portion, and the hole axis of the light-collecting through-hole is suitable for being coaxially arranged with the optical axis of the camera; The shading portion includes two shading petals, which are respectively connected to the same end of the mounting portion and are spaced apart on the periphery of the light-transmitting hole; a reflecting portion is provided on the side of the shading petal facing the light-transmitting hole, and the inner diameter of the reflecting portion on the side away from the mounting portion is larger than the inner diameter of the reflecting portion on the side close to the mounting portion.

2. The shading device according to claim 1, wherein: In a direction from the light shielding portion to the mounting portion, an inner diameter of the reflecting portion gradually decreases.

3. The shading device according to claim 2, wherein: The reflecting portion includes a plurality of reflecting steps, and the plurality of reflecting steps are sequentially arranged along the extending direction of the hole axis.

4. The shading device according to claim 3, wherein: The surfaces of two adjacent reflecting steps on each of the light-shielding petals are continuously connected; and / or Each of the reflective steps is an annular structure or an arc structure coaxial with the daylighting hole; and / or The surface of each reflective step is a matte surface.

5. The shading device according to claim 3, wherein: Each of the reflecting steps includes a first reflecting surface and a second reflecting surface connected in series; the first reflecting surface is a plane facing away from the mounting portion, and the first reflecting surface is perpendicular to the hole axis; the second reflecting surface is an inner cylindrical surface or a conical surface coaxial with the daylighting hole.

6. The shading device according to claim 1, wherein: The two light-shielding petals are respectively located on both sides of a first reference plane and are spaced apart. The two light-shielding petals are mirror-symmetrical about the first reference plane, and the first reference plane passes through the hole axis.

7. The shading device according to claim 6, wherein: The two shading petals are distributed around the periphery of the light-transmitting hole, and the adjacent parts of the two shading petals define two gaps. The two gaps are respectively located on both sides of the second reference plane, and the two gaps are asymmetrical about the second reference plane. The second reference plane passes through the hole axis and is perpendicular to the first reference plane.

8. The shading device according to claim 1, wherein: Each of the shading petals has a first side surface, the first side surfaces of the two shading petals are located on the same side of the shading portion, the first side surfaces of the two shading petals are coplanar and constitute a first lighting plane, and the first lighting plane intersects with the hole axis.

9. The shading device according to claim 8, wherein: Each of the light-shielding petals has a second side surface, the first side surface and the second side surface are respectively located on two opposite sides of the light-shielding cover, and each of the second side surfaces intersects with the hole axis of the light-shielding cover.

10. The shading device according to claim 9, wherein: Both of the second side surfaces are planes, the two second side surfaces are coplanar and constitute a second lighting plane, and the second lighting plane intersects with the hole axis; and / or Both of the second side surfaces are curved surfaces, and the two second side surfaces are smoothly connected.

11. The shading device according to any one of claims 1 to 10, wherein: The shading device also includes a light blocking screen, which is provided with a light blocking space and a light-transmitting through hole connected to the light blocking space. The light shield is installed on the light blocking screen and is located in the light blocking space. The light-collecting through hole is connected to the light-transmitting through hole.

12. The shading device according to claim 11, wherein: The light-blocking screen includes a connecting portion and two first light-blocking portions, wherein the two first light-blocking portions are respectively connected to two ends of the connecting portion and are arranged in a spaced relationship with each other, and the light-blocking space is located between the two first light-blocking portions; The light-transmitting through hole is provided in the connecting portion, the mounting portion is connected to the connecting portion, and the arrangement direction of the two light-shielding petals of the light-shielding cover is the same as the parallel direction of the two first light-blocking portions.

13. The shading device according to claim 12, wherein: Each of the first light blocking portions has a connecting end and an extending end, wherein the connecting end is connected to the connecting portion and the extending end extends in a direction away from the connecting portion; the distance between the connecting ends of the two first light blocking portions is smaller than the distance between the extending ends of the two first light blocking portions.

14. The shading device according to claim 12, wherein: The light-blocking screen also includes a second light-blocking portion, which is located between the two first light-blocking portions and connected to the connecting portion and the two first light-blocking portions. The light-shielding cover is spaced apart from the second light-blocking portion, and there is a gap between the two light-blocking petals, which is opposite to the second light-blocking portion.

15. The shading device according to claim 12, wherein: The shading device includes at least two shading covers, at least two of which are arranged at intervals on the connecting portion, and the hole axes of at least two of the shading covers are parallel; each of the shading portions has a length dimension along the extension direction of the hole axis, and the length dimensions of the shading portions of the at least two shading covers are different.

16. An image acquisition device, characterized in that: include: a camera having an optical axis; as well as The shading device according to any one of claims 1 to 15, wherein the shading device is mounted on the camera, and the hole axis of the light-collecting hole is coaxially arranged with the optical axis of the camera.

17. A transport vehicle, characterized in that: include: Vehicle body; as well as The image acquisition device according to claim 16, wherein the image acquisition device is mounted on the carrier body.

Images