CN217335680U - Camera device and entrance guard's equipment - Google Patents

Abstract

The application provides a camera device and entrance guard's equipment. The intelligent security and protection technical field is related to, the anti-fogging performance of the camera device can be improved, and the accuracy of the face recognition function is improved. The camera device comprises a shell, a camera assembly and a sealing piece. The shell encloses a mounting cavity. The camera assembly is fixed in the installation cavity and comprises a lens. The sealing element is at least partially sleeved on the outer side of the camera assembly, and at least part of the inner side surface of the sealing element is contacted with the outer side of the camera assembly; at least part of the seal abuts an inner wall of the housing; the mounting cavity comprises a first cavity, and the first cavity comprises a space formed by a shell, a lens and a sealing piece; the first chamber is a closed space. The lens faces the first chamber. The application provides a camera device and entrance guard's equipment can realize preventing the effect of hazing.

Description

Camera device and entrance guard's equipment

Technical Field

The utility model relates to an intelligent security technical field, in particular to camera device and entrance guard's equipment.

Background

The entrance guard's equipment can realize multiple functions such as face identification, voice conversation, recognition of punching the card to wide application in multiple occasion. The access control equipment comprises a camera device, and the camera device is used for achieving a face recognition function.

In the working process of the camera device, the internal device operates to increase the internal environment temperature of the camera device; at this time, if the external environment temperature of the image pickup apparatus drops sharply, the temperature difference between the internal working environment temperature of the image pickup apparatus and the external environment temperature increases sharply, so that water vapor in the internal environment condenses on the inner surface of the transparent cover for protecting the lens in the image pickup apparatus, and the inner surface of the transparent cover generates a fogging phenomenon, which affects the light transmittance of the transparent cover. Because the camera lens receives the light that passes through from the translucent cover, consequently, the homogeneity and the energy reduction of camera lens received light for the definition that the camera lens gathered the image reduces, thereby reduces entrance guard's equipment face identification function's the degree of accuracy.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a camera device and entrance guard's equipment, can improve camera device's antifogging property, improves the degree of accuracy of face identification function.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

in a first aspect, a camera device is provided that includes a housing, a camera assembly, and a seal. The shell encloses a mounting cavity. The camera assembly is fixed in the installation cavity and comprises a lens. The sealing element is at least partially sleeved on the outer side of the camera assembly, and at least part of the inner side surface of the sealing element is in contact with the outer side of the camera assembly; at least part of the seal abuts an inner wall of the housing; the mounting cavity comprises a first cavity, and the first cavity comprises a space formed by a shell, a lens and a sealing piece; the first chamber is a closed space, and the lens faces the first chamber.

The first chamber is a closed space surrounded by the lens, the shell and the sealing element. The camera lens is towards first cavity, and the sealing member separates camera lens and other structures in the installation cavity promptly, avoids the temperature of the first cavity of heat influence that the device function in the installation cavity produced, and then, reduces the difference in temperature between camera lens ambient temperature (the ambient temperature of first cavity promptly) and the camera device external environment temperature, improves camera device's antifogging property, improves the degree of accuracy of face identification function.

Optionally, the field angle of the lens corresponds to a conical light collecting area; the edge of the sealing piece close to the first cavity is tangent to the conical lighting area, or a gap is reserved between the sealing piece and the conical lighting area.

Optionally, the surface of the sealing element, which abuts against the housing, is a first surface, and the first surface is provided with a first convex rib; the first convex rib is arranged around the camera component; first protruding muscle is continuous bar arch on the first face, first protruding muscle with the inner wall of casing supports and leans on.

Optionally, the number of the first ribs is multiple, and the multiple first ribs are arranged at intervals; the first convex rib protrudes out of the first surface and is abutted against the inner wall of the shell; the size of the first convex rib along the direction vertical to the first surface is 0.2 mm-0.3 mm.

Optionally, the first rib includes a first sub-rib and a second sub-rib; the first sub-convex ribs and the second sub-convex ribs are arranged at intervals. The first sub-convex rib is arranged on one side of the first surface close to the first cavity, and the second sub-convex rib is arranged on one side of the first sub-convex rib far away from the first cavity; the first sub-convex rib is tangent to the conical lighting area, or a gap is formed between the first sub-convex rib and the conical lighting area.

Optionally, the surface of the sealing member contacting the camera head assembly is the second surface. The surface between the second face and the first face is a transition face. The intersection line of the transition surface and the second surface is tangent to the conical lighting area; or a gap is arranged between the intersection line of the transition surface and the second surface and the conical light collecting area.

The intersection line of the transition surface and the second surface is positioned on one side of the first sub-convex rib close to the camera component; and the distance between the intersection line of the transition surface and the second surface and the tapered light collecting area is smaller than the distance between the first sub-convex rib and the tapered light collecting area.

Optionally, the surface of the sealing element, which is in contact with the camera assembly, is a second surface, and the second surface is provided with a second convex rib; the second rib is disposed around the camera assembly.

Optionally, the number of the second ribs is multiple, and the multiple second ribs are arranged at intervals.

Optionally, the camera device further includes a fixing member, which is disposed outside the first cavity and surrounds the camera assembly; one end of the fixing piece close to the sealing piece is abutted against the sealing piece.

Optionally, the surface of the sealing element, which is in contact with the fixing element, is a third surface, and the third surface is provided with at least one third convex rib; the third rib is arranged around the camera assembly.

Optionally, the camera device further comprises an infrared lamp panel, and the infrared lamp panel is arranged on the fixing piece.

Optionally, the housing comprises a rear shell, a front shell and a transparent protective cover. The rear housing includes a recess configured to mount a camera head assembly. The front shell is provided with an opening, and the front shell and the rear shell are enclosed to form a cavity with an opening. The transparent protective cover is positioned at the opening, and the closed cavity forms an installation cavity; and the transparent protective cover is semi-spherical. One end of the camera component is positioned in the groove and is connected with the rear shell; the lens of the camera component is positioned at one end far away from the rear shell and extends out of the opening. The seal abuts against the inner wall of the transparent protective cover.

Optionally, the housing further includes a plurality of limiting posts located outside the first cavity and disposed around the sealing member; one end of the limiting column is connected with the transparent protective cover, and the side wall of the limiting column is abutted against the sealing piece.

In a second aspect, an access control apparatus is provided, which includes the imaging device provided in the first aspect.

The application provides an entrance guard's equipment, including the camera device that above-mentioned first aspect provided, consequently have above-mentioned camera device's whole beneficial effect, no longer describe herein.

Drawings

Fig. 1 is a schematic structural diagram of an access control device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of an access control device provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view of the access device provided in FIG. 1 along section line AA;

fig. 4 is an enlarged view of a portion G of the image pickup device shown in fig. 3;

fig. 5 is another enlarged view of a portion G of the image pickup apparatus shown in fig. 3.

Detailed Description

The technical solutions in some embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In the present application, "at least one" means one or more, "a plurality" means two or more.

Further, in the present application, directional terms such as "upper" and "lower" are defined with respect to a schematically-disposed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts that are used for descriptive and clarity purposes and that will vary accordingly with respect to the orientation in which the components are disposed in the drawings.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either directly connected, electrically connected, indirectly connected through an intermediate member, or interconnected between two members. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

At present, in order to adapt to different application scenarios, access control equipment includes an indoor installation part and an outdoor installation part. The outdoor installation part includes a camera device configured to collect an image, and a face recognition function can be implemented. The indoor installation part comprises a display device, and the display device is configured to display images collected by the outdoor installation part in real time, so that a user can know outdoor scenes conveniently. The camera device comprises a lens and a transparent cover for protecting the lens.

The operation of the outdoor installation part is generally influenced by the external environment (the environment outside the camera device), for example, the definition of an image captured by the camera device is influenced by the temperature of the external environment. Under the condition that the temperature difference between the external environment temperature and the temperature of the internal working environment of the camera device is large, water vapor is condensed on the inner surface of a transparent cover of the camera device, so that the surface of a lens generates a fogging phenomenon, the light transmittance of the lens is reduced, clear images cannot be acquired, and the accuracy of face recognition is reduced; when the environment is severe, the entrance guard equipment can lose the face recognition function.

It should be explained that the humidity of the working environment inside the image pickup apparatus is the same as the assembling environment of the image pickup apparatus. After the camera device is assembled, the humidity of the internal working environment of the camera device is determined and unchanged, and the temperature of the internal working environment of the camera device changes along with the work of internal components of the camera device.

Generally, the assembly environment of the image pickup device contains a certain amount of moisture, and the internal working environment of the image pickup device also contains the same amount of moisture. The temperature value at which the moisture in the current environment condenses and just drops water is the dew point. The dew point temperature of the internal working environment of the camera device is related to the temperature of the internal working environment of the camera device and the temperature difference between the internal working environment of the camera device and the external environment. Like this, in the camera device working process, be greater than external environment temperature at camera device internal work ambient temperature, and under the great condition of the difference in temperature, external environment temperature is less than the dew point temperature that camera device internal work ambient's temperature corresponds, and the vapor condensation in the camera device internal work ambient for the lens surface produces the fog phenomenon.

In addition, if the assembly environment of the image pickup apparatus does not contain moisture (for example, a vacuum environment, an environment filled with inert gas, or an environment with extremely low humidity), no moisture condenses in the internal working environment of the image pickup apparatus regardless of an increase or decrease in the temperature difference between the external ambient temperature and the temperature of the internal working environment of the image pickup apparatus. However, the assembly environment without water vapor is more demanding, not easy to be widely applied, and the process cost is higher. Therefore, those skilled in the art will not typically employ this assembly environment for fabrication.

In the related art, in the outdoor installation part of the access control equipment, a fan and a ventilation pipeline are additionally arranged so as to blow heat generated by the operation inside the outdoor installation part to the inner surface of the transparent cover, so that the temperature difference between the ambient temperature around the lens and the outdoor temperature is reduced, and the probability of fogging of the inner surface of the transparent cover is further reduced. However, the heat that camera device internal work produced is limited, and the amount of wind and the heat that blow to the lens surface through air pipe are less, and is not obvious and unstable to the effect that reduces the difference in temperature of the interior internal surface environment of translucent cover, and then unstable to the effect that reduces translucent cover internal surface and haze to add fan and air pipe, the structure is complicated and the cost is higher, is unfavorable for the wide application.

Or, a temperature control module (such as a heating device) is additionally arranged on the outdoor installation part, the temperature of the internal working environment of the camera device is regulated and controlled to be basically the same as the outdoor temperature, and the fogging probability of the surface of the lens is further reduced. However, the temperature control module can generate heat when operating, the temperature difference between the internal environment temperature and the outdoor temperature of the camera device is increased, the effect of reducing the fogging of the surface of the lens is more unstable, the cost of additionally arranging the temperature control module is higher, and the wide application is not facilitated.

To this end, as shown in fig. 1, the present application provides an access control device 1000. The access control apparatus 1000 includes a camera 100 and a voice device 200. The camera 100 and the audio device 200 may share the same housing 110. In the following examples of the present application, the image pickup apparatus 100 and the casing 110 thereof are described only by way of example, and the casing 100 of the image pickup apparatus 100 and the voice apparatus 200 is not particularly divided.

In addition, the access control device 1000 may further include any device for implementing security protection, such as a card swiping sensing device, a fingerprint recognition device, etc., and these devices may also share one housing 110 with the camera device 100, which is not limited in the following embodiments of the present application.

In some embodiments, as shown in fig. 3, camera device 100 includes a housing 110 and a camera assembly 120. The housing 110 encloses a mounting cavity 101, the camera assembly 120 is fixed in the mounting cavity 101, and the housing 110 protects the camera assembly 120.

In some examples, as shown in fig. 2, the housing 110 includes a rear shell 111, a front shell 112, and a transparent protective cover 114.

Rear housing 111 includes a recess 1111, with recess 1111 configured to mount camera head assembly 120. One end of the camera assembly 120 is positioned in the recess 1111 and is coupled to the rear case 111.

Illustratively, the camera assembly 120 includes optical components such as a lens 1201, a circuit board 1202, a fixing base, an IR-CUT dual-filter switch, and a Charge Coupled Device (CCD). The lens 1201 is mounted on the fixed base and configured to receive light. The fixing base is fixed on the circuit board 1202, and the fixing base provides a supporting function for the lens 1201, so that the lens 1201 is electrically connected with the circuit board 1202. The circuit board 1202 drives the lens 1201 to capture an image. The circuit board 1202 is fixedly connected to the inner wall of the recess 1111, so that the lens 1201 is fixedly mounted at a position of the housing 110.

And a CCD is located on the circuit board 1202 and electrically connected to the circuit board 1202, configured to receive light and convert it into an electrical signal. The IR-CUT dual filter switch is located on the circuit board 1202 and is electrically connected to the circuit board 1202. The IR-CUT dual-filter switcher comprises an infrared CUT or absorption filter, a full-transmission spectrum filter and a driving circuit. The circuit board 1202 transmits the detected intensity signal of the external light to the IR-CUT dual-filter switch, so that the driving circuit drives the IR-CUT dual-filter switch to automatically switch the two filters according to the intensity signal of the external light, so that the CCD can fully receive and utilize the received light, thereby improving the low-light performance of the camera assembly 120.

The front shell 112 is provided with an opening 1121, and the front shell 112 and the rear shell 111 enclose a cavity with an opening. The front housing 112 and the rear housing 111 are sealed together by a gasket 113.

The transparent protective cover 114 is located at the opening 1121, and the closed chamber forms the mounting cavity 101. Here, the edge of the transparent protection cover 114 and the edge of the opening 1121 of the front housing 112 are fixedly connected by dispensing, so that the process cost and the assembly process can be reduced.

In some examples, as shown in fig. 3, the lens 1201 of the camera assembly 120 is located at an end away from the rear housing 111 and protrudes through the opening 1121. In this way, the lens 1201 can be set to have an ultra-large field angle to meet the requirement of a larger field of view and increase the visual range of the lens 1201.

Here, the front projection of the transparent protection cover 114 on the rear case 111 covers the front projection of the lens 1201 on the rear case 111. The transparent protective cover 114 is configured to protect the lens 1201, prevent the lens 1201 from being contaminated by an external environment or prevent the lens 1201 from being broken by an external force. For example, the material of the transparent protection cover 114 may be glass or other transparent and rigid material, and it is sufficient that the normal image acquisition by the lens 1201 is not affected.

In addition, the transparent protection cover 114 is designed to be contoured according to the shape of the portion of the lens 1201 extending out of the opening 1121, so that the volume of the cavity between the transparent protection cover 114 and the lens 1201 is smaller, and further, the volume of air between the transparent protection cover 114 and the lens 1201 is smaller. For example, the transparent protective cover 114 is provided as a semi-spherical structure.

In this way, the heat generated by the operation of each component of the camera assembly 120 can be transmitted to the space between the transparent protection cover 114 and the lens 1201 through the air, which is beneficial to reducing the temperature difference between the environment of the inner surface of the transparent protection cover 114 and the environment of the inner surface, and reducing the probability of fogging of the inner surface of the transparent protection cover 114.

In some embodiments, as shown in fig. 3, the camera device 100 includes a seal 130. The sealing member 130 is at least partially fitted around the outside of the camera head assembly 120, and at least a part of the inner side surface of the sealing member 130 is in contact with the outside of the camera head assembly 120. At least a portion of the seal 130 abuts against an inner wall of the housing 110. The installation cavity 101 includes a first chamber 1011, and the first chamber 101 includes a space formed by the housing 110, the lens 1201 and the sealing member 130. Illustratively, the first chamber 1011 is a sealed space surrounded by the transparent protective cover 114, the lens 1201 and the seal 130.

The installation cavity 101 further includes a second chamber 1012, i.e., a space in the installation cavity 101 other than the first chamber 1011. The second chamber 1012 contains the components necessary for the operation of the imaging device 100, which generate heat. In this way, the lens 1201 of the camera assembly 120 faces the first chamber 1011, that is, the sealing member 130 separates the lens 1201 from other devices in the mounting cavity 101, so as to prevent heat generated by the operation of the devices in the second chamber 1012 from affecting the temperature of the first chamber 1011, further reduce the temperature difference between the ambient temperature around the lens 1201 (i.e., the ambient temperature of the first chamber 1011) and the external ambient temperature of the camera device 100, improve the anti-fogging performance of the camera device 100, and improve the accuracy of the face recognition function.

In some embodiments, as shown in fig. 3, the volume of the first chamber 1011 is less than the volume of the second chamber 1012. Thus, the volume of air in the first chamber 1011 is small, the probability that the water vapor in the first chamber 1011 condenses on the inner surface of the transparent protection cover 114 is reduced, and the anti-fogging performance of the image pickup apparatus 100 is improved.

In some embodiments, the field angle at which the lens 1201 captures images is set according to actual circumstances. As shown in fig. 3, the angle of view α of the lens 1201 corresponds to one tapered lighting region. It is understood that the field angle α of the lens 1201 can be set as desired.

As shown in fig. 3 and 4, in a case where there is no particular requirement on the angle of view α of the lens 1201, the sealing member 130 at least partially covers the outside of the lens 1201 and abuts against the inner wall of the transparent protective cover 114, and at this time, there is a gap between the sealing member 130 and the tapered lighting area. The volume of the first chamber 1011 enclosed by the sealing ring 130, the transparent protective cover 114 and the lens 1201 is minimal. The surface of the sealing element 130 contacting the camera assembly 120 is perpendicular to the bottom of the groove 1111 of the rear housing 111, and the edge of the sealing ring 130 close to the first chamber 1011 does not overlap with the tapered lighting area, so that the sealing ring 130 does not affect the lighting effect of the lens 1201.

Alternatively, as shown in fig. 3 and 5, when the angle of view α of the lens 1201 is large, based on the installation position of the sealing member 130 of the first chamber 1011 enclosing the minimum volume, the portion S where the sealing member 130 overlaps the tapered lighting area is removed, so that the edge of the sealing member 130 close to the first chamber 1011 is tangent to the tapered lighting area, thereby preventing the sealing ring 130 from blocking the lighting of the lens 1201.

It is understood that the shape and size of the sealing member 130 are related to the field angle α of the lens 1201, and in the case of the first chamber 1011 with the smallest volume, the sealing member 130 does not affect the lens 1201 to collect light.

In some embodiments, as shown in fig. 4 and 5, the surface of the sealing member 130 abutting against the housing 110 is the first face S1, the first face S1 is provided with a first rib 1301, and the first rib 1301 is arranged around the camera head assembly 120 and configured to increase the tightness of the abutting position of the sealing member 130 and the housing 110. The first rib 1301 is a continuous strip-shaped protruding structure on the first surface S1, and the first rib 1301 abuts against the inner wall of the housing 110.

It is understood that the first rib 1301 on the sealing member 130 abuts against the housing 110, and here, a gap may exist between the first surface S1 of the sealing member 130 and the housing 110, or the first surface S1 may contact with the housing 110. The first rib 1301 is an interference structure on the sealing member 130, and the sealing member 130 is connected with the housing 110 in an interference fit manner. Similarly, the second bead 1302 and the third bead 1303, which are mentioned below, are interference structures on the seal 130.

As an example, the material of the first rib 1301 includes rubber or silicon rubber. For example, the material of the first ribs 1301 includes silicon rubber. The silicon rubber is a flexible material, the transparent protective cover 114 cannot be scratched on the surface of the first convex rib 1301 in contact with the transparent protective cover 114, and the flexible material can show a better sealing effect in the extrusion action.

In some examples, as shown in fig. 4 and 5, the sealing element 130 abuts against the inner wall of the transparent protective cover 114, and the surface of the sealing element 130 abutting against the transparent protective cover 114 is provided with a first rib 1301.

The number of the first ribs 1301 is multiple, and the multiple first ribs 1301 are arranged at intervals. For example, the number of the first ribs 1301 is two, so that the tightness of the abutting position of the sealing member 130 and the housing 110 is ensured, and the sealing performance of the sealing member 130 to the first cavity 1011 is improved. Moreover, after the two first ribs 1301 contact with the transparent protection cover 114, the appearance of the transparent protection cover is shown as two concentric circles, which is more beautiful.

In other examples, as shown in fig. 4 and 5, the first rib 1301 includes a first sub-rib 13011 and a second sub-rib 13012. The first sub-ribs 13011 and the second sub-ribs 13012 are arranged at intervals; the first sub-convex rib 13011 is disposed on one side of the first surface S1 close to the first cavity 1011, and the second sub-convex rib 13012 is disposed on one side of the first sub-convex rib 13011 away from the first cavity 1011. The first sub-rib 13011 is tangent to the tapered lighting area, or a gap is formed between the first sub-rib 13011 and the tapered lighting area.

Illustratively, as shown in fig. 5, the surface of the sealing member 130 that contacts the camera head assembly 120 is the second face S2. The surface between the second face S2 and the first face S1 is a transition face S0. The first sub-rib 13011 is disposed at an intersection (edge) of the first surface S1 and the transition surface S0, and the first sub-rib 13011 is a highest point of the sealing member 130 along a direction perpendicular to the transition surface S0, so that, when the angle of view α of the lens 1201 is large, the transition surface S0 is tangent to the tapered lighting area, and a gap is formed between the first sub-rib 13011 and the tapered lighting area. At this time, the volume of the first chamber 1011 enclosed by the sealing ring 130, the transparent protection cover 114 and the lens 1201 is minimized.

In addition, in the case where the first sub-ridge 13011 is tangent to the tapered lighting zone, the transition surface S0 of the sealing member 130 is a plane, i.e., the transition surface S0 overlaps the boundary of the tapered lighting zone, and the transition surface S0 and the first sub-ridge 13011 are both tangent to the tapered lighting zone.

It can be understood that the position, shape and size of the first rib 1301 do not affect the lighting light of the lens 1201. Wherein the height dimension of the first ribs 1301 in the direction perpendicular to the first face S1 is related to the number of the first ribs 1301 provided on the first face S1. Illustratively, the first bead 1301 has a height dimension perpendicular to the first face S1 in a range of 0.2mm to 0.3 mm. For example, the first bead 1301 has a height dimension perpendicular to the first face S1 in the range of 0.2mm, 0.25mm, or 0.3 mm.

In still other examples, as shown in fig. 4 and 5, the surface of the sealing member 130 that contacts the camera head assembly 120 is the second face S2. The surface between the second face S2 and the first face S1 is a transition face S0. The intersection line A of the transition surface S0 and the second surface S2 is positioned on one side of the first sub-convex rib 13011 close to the camera head assembly 120; moreover, an intersection line A (namely the edge of the sealing element 130) of the transition surface S0 and the second surface S2 is tangent to the conical lighting area; alternatively, a gap is formed between the intersection line a (i.e., the edge of the sealing member 130) of the transition surface S0 and the second surface S2 and the tapered lighting area.

For example, as shown in fig. 4, a gap is formed between the intersection line a (i.e., the edge of the sealing member 130) of the transition surface S0 and the second surface S2 and the tapered lighting area. The transition surface S0 forms a right angle with the second surface S2. The intersection line A of the transition surface S0 and the second surface S2 is positioned on one side of the first sub-convex rib 13011 close to the camera head assembly 120; the distance H1 between the intersection line a of the transition surface S0 and the second surface S2 and the tapered lighting region is smaller than the distance H2 between the first sub-rib 13011 and the tapered lighting region. Alternatively, as shown in fig. 5, the transition surface S0 is tangent to the tapered lighting area, and the first sub-rib 13011 has a gap with the tapered lighting area. The distance between the intersection line a of the transition surface S0 and the second surface S2 and the tapered lighting zone is 0, that is, the distance between the intersection line a of the transition surface S0 and the second surface S2 and the tapered lighting zone is smaller than the distance between the first sub-ridge 13011 and the tapered lighting zone.

In some embodiments, as shown in fig. 4 and 5, the surface of the sealing member 130 contacting the camera head assembly 120 is the second face S2, and the second face S2 is provided with the second rib 1302. The second rib 1302 is a continuous strip-like structure and is disposed around the camera head assembly 120 and is configured to increase the tightness of the abutment of the seal 130 with the camera head assembly 120.

For example, the number of the second ribs 1302 is multiple, and multiple second ribs 1302 are arranged at intervals. For example, the number of the second ribs 1302 is three, and three second ribs 1302 are provided at intervals.

For example, the height dimension of the second rib 1302 along a direction perpendicular to the second face S2 is related to the number of second ribs 1302 disposed on the second face S2. Illustratively, the height dimension of the second rib 1302 along the direction perpendicular to the second surface S2 is in the range of 0.15mm to 0.25 mm. For example, the second ribs 1302 may have a height dimension perpendicular to the second side S2 in the range of 0.15mm, 0.2mm, or 0.25 mm.

In some embodiments, as shown in fig. 3, the camera device 100 includes a fixing member 140 disposed in the second cavity 1012 and an infrared lamp panel 150. The fixing member 140 is disposed outside the first chamber 1011 (i.e., inside the second chamber 1012), and surrounds the camera assembly 120, and the fixing member 140 is fixed on the circuit board 1202. Infrared lamp panel 150 is disposed on fixing member 140.

Illustratively, as shown in FIG. 3, an end of the securing member 140 adjacent the sealing member 130 abuts the sealing member 130. This mounting 150 can provide the mounted position for infrared lamp plate 150, also can provide the supporting role for sealing member 130 to press from both sides sealing member 130 tightly.

As shown in fig. 4 and 5, the surface of the sealing member 130 contacting the fixing member 140 is a third surface S3, and the third surface S3 is provided with at least one third rib 1303. The third ribs 1303 are disposed around the camera assembly 120. The third ribs 1303 may be in the shape of continuous strips or dot-shaped protrusions arranged at intervals, so as to increase the friction force between the sealing element 130 and the contact surface of the fixing element 140, and ensure that the sealing element 130 is clamped between the fixing element 140 and the transparent protection cover 114.

By way of example, the height dimension of the third ribs 1303 perpendicular to the third face S3 is related to the number of third ribs 1303 provided on the third face S3. Illustratively, the height dimension of the third ribs 1303 along the vertical direction to the third surface S3 ranges from 0.2mm to 0.3 mm. For example, the third ribs 1303 have a height dimension perpendicular to the third face S3 in a range of 0.2mm, 0.25mm, or 0.3 mm.

The sealing member 130 is made of a rubber mold. The first rib 1301, the second rib 1302, and the third rib 1303 are made of the same material as the sealing member 130 and are integrally formed. The process has the advantages of low cost and simple steps, and is beneficial to wide application.

In some embodiments, as shown in fig. 4 and 5, the housing 110 further comprises a plurality of restraint posts 115, the plurality of restraint posts 115 being located outside the first chamber 1011 (i.e., inside the second chamber 1012) and disposed around the seal 130. One end of the limiting column 115 is connected with the transparent protection cover 114, and the side wall of the limiting column 115 abuts against the sealing member 130.

Furthermore, the position-limiting column 115 is located on a side of the sealing member 130 away from the first chamber 1011, and a plurality of position-limiting columns 115 are disposed around the sealing member 130. The sealing member 130 is clamped by the cooperation of each of the posts 115 and the camera head assembly 120 to prevent the sealing member 130 from moving in a plane parallel to the circuit board 1202.

Illustratively, as shown in fig. 4, the transparent protective cover 114 is provided with a plurality of fixing holes 1141. The position-limiting posts 115 correspond to the fixing holes 1141 one to one, and each position-limiting post 115 passes through one fixing hole 1141 and is fixedly connected with the fixing hole 1141 through dispensing. The inner wall of the fixing hole 1141 is stepped, so that the fixing hole 1141 is conveniently bonded with the position-limiting column 115. Here, the fixing hole 1141 is located outside the first chamber 1011 and does not affect the sealing performance of the first chamber 1011.

For example, as shown in fig. 5, the limiting post 115 may be integrated with the transparent protection cover 114. Thus, the process steps of the transparent protection cover 114 can be simplified, and the manufacturing efficiency of the transparent protection cover 114 can be improved.

It should be noted that the assembly of the housing 110, the camera assembly 120, the sealing member 130, the fixing member 140 and the ir lamp panel 150 is performed in a dry environment. The dry environment is mainly represented by the temperature and humidity of the environment. And the criteria for a dry environment are related to latitude and longitude. The assembly environment can be set according to the dry environment indexes of different regions. Thus, different levels of the anti-fogging effect of the image pickup apparatus 100 can be set according to different indexes of the dry environment to adapt to different demands.

The temperature at which the moisture in the environment condenses and just drops, for example, is the dew point. Combining the following equations, where Td is the dew formation temperature; t is the current temperature; RH is the current humidity; tn is the temperature constant; m is a coefficient. When the current temperature is above 0 ℃, Tn is 243.12, and m is 17.62. When the current temperature is below 0 ℃, Tn is 272.62, and m is 22.46.

For example, when the temperature is 70 ℃ and the humidity is 40%, the dew point temperature is 50.27 ℃ and the condensation temperature difference is 19.73 ℃, so that the visible moisture can be condensed.

When the temperature is 70 ℃ and the humidity is 30%, the dew point temperature is 44.7 ℃, and the condensation temperature difference is 25.3 ℃ so that visible water vapor can be condensed.

When the temperature is 70 ℃ and the humidity is 20%, the dew point temperature is 37 ℃, and the condensation temperature difference is 33 ℃ so as to condense visible water vapor.

When the temperature is 70 ℃ and the humidity is 10%, the dew point temperature is 24.9 ℃, and the condensation temperature difference is 45.1 ℃ so as to be condensed into visible water vapor.

When the temperature is 60 ℃ and the humidity is 40%, the dew point temperature is 41.5 ℃, and the condensation temperature difference is 18.5 ℃ so that visible water vapor can be condensed.

When the temperature is 60 ℃ and the humidity is 30%, the dew point temperature is 36.3 ℃, and the condensation temperature difference is 23.7 ℃ so as to be condensed into visible water vapor.

When the temperature is 60 ℃ and the humidity is 20%, the dew point temperature is 29 ℃, and the condensation temperature difference is 31 ℃ so as to be condensed into visible water vapor.

When the temperature is 60 ℃ and the humidity is 10%, the dew point temperature is 17.6 ℃, and the condensation temperature difference is 42.4 ℃ so as to be condensed into visible water vapor.

Thus, under the condition that the current environmental temperature is 60-70 ℃, the environmental humidity is 10-20 percent, which meets the requirement of a dry environment. The components of the image pickup apparatus 100 are assembled in the dry environment, so that the humidity in the first chamber 1011 of the image pickup apparatus 100 is reduced, and the anti-fogging performance of the image pickup apparatus 100 is improved.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (14)

1. An image pickup apparatus, comprising:

the shell surrounds a mounting cavity;

the camera assembly is fixed in the mounting cavity and comprises a lens;

the sealing element is at least partially sleeved on the outer side of the camera assembly, and at least part of the inner side surface of the sealing element is in contact with the outer side of the camera assembly; at least part of the seal abuts an inner wall of the housing;

the mounting cavity comprises a first chamber, and the first chamber comprises a space formed by the shell, the lens and the sealing piece; the first chamber is a closed space, and the lens faces the first chamber.

2. The image pickup apparatus according to claim 1, wherein a field angle of the lens corresponds to a tapered light collecting area;

the edge of the sealing element close to the first chamber is tangent to the conical lighting area, or a gap is formed between the sealing element and the conical lighting area.

3. The image pickup device according to claim 2, wherein a surface of the sealing member against the housing is a first surface provided with a first rib; the first convex rib is arranged around the camera assembly;

first protruding muscle is continuous bar is protruding on the first face, first protruding muscle with the inner wall of casing supports and leans on.

4. The image pickup apparatus according to claim 3, wherein the number of the first ribs is plural, and the plural first ribs are provided at intervals;

the first convex rib is of an interference structure, protrudes out of the first surface and is abutted against the inner wall of the shell;

the size of the first convex rib along the direction vertical to the first surface is 0.2 mm-0.3 mm.

5. The image pickup apparatus according to claim 3, wherein said first rib includes a first sub-rib and a second sub-rib; the first sub convex ribs and the second sub convex ribs are arranged at intervals; the first sub-convex rib is arranged on one side, close to the first cavity, of the first surface, and the second sub-convex rib is arranged on one side, far away from the first cavity, of the first sub-convex rib;

the first sub-convex rib is tangent to the conical lighting area, or a gap is formed between the first sub-convex rib and the conical lighting area.

6. The camera device of claim 5, wherein the surface of the seal that contacts the camera head assembly is a second face; the surface between the second face and the first face is a transition face;

the intersection line of the transition surface and the second surface is tangent to the conical lighting area; or a gap is reserved between the intersection line of the transition surface and the second surface and the conical light collecting area;

the intersection line of the transition surface and the second surface is positioned on one side of the first sub-convex rib close to the camera assembly; and the distance between the intersection line of the transition surface and the second surface and the tapered light collecting area is smaller than the distance between the first sub-convex rib and the tapered light collecting area.

7. The camera device according to claim 1 or 2, wherein the surface of the sealing member contacting the camera head assembly is a second surface, and the second surface is provided with a second rib; the second convex rib is arranged around the camera assembly.

8. The image pickup apparatus according to claim 7, wherein the number of the second ribs is plural, and the plural second ribs are provided at intervals.

9. The image pickup apparatus according to claim 1 or 2, further comprising:

the fixing piece is arranged outside the first cavity and surrounds the camera assembly; one end of the fixing piece close to the sealing piece abuts against the sealing piece.

10. The image pickup device according to claim 9, wherein a surface of the sealing member contacting the fixing member is a third surface provided with at least one third rib; the third convex rib is arranged around the camera assembly.

11. The camera device of claim 9, further comprising an infrared lamp panel disposed on the mount.

12. The image pickup apparatus according to claim 1 or 2, wherein the housing includes:

a rear housing comprising a recess configured to mount the camera assembly;

the front shell is provided with an opening, and a cavity with an opening is enclosed by the front shell and the rear shell;

the transparent protective cover is positioned at the opening and used for sealing the cavity to form the mounting cavity; the transparent protective cover is semi-spherical;

one end of the camera assembly is positioned in the groove and is connected with the rear shell; the lens of the camera assembly is positioned at one end far away from the rear shell and extends out of the opening; the seal abuts against an inner wall of the transparent protective cover.

13. The image pickup apparatus according to claim 12, wherein said housing further comprises:

the limiting columns are positioned outside the first cavity and arranged around the sealing piece; one end of the limiting column is connected with the transparent protective cover, and the side wall of the limiting column is abutted to the sealing piece.

14. An access control apparatus comprising the imaging device according to any one of claims 1 to 13.

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