WO2019170155A1 - Video camera - Google Patents

Abstract

Disclosed in the present application is a video camera, the video camera comprising: a front barrel, a mounting face of the front barrel being provided with a second viewing window through-hole and a second light-supplementing through-hole; a viewing window body, the viewing window body being mounted on the second viewing window through-hole by means of a first sealing ring; and a lens body, the lens body being mounted on the second light-supplementing through-hole by means of a second sealing ring. By means of the sealing rings, the present application hermetically mounts a transparent cover assembly on the mounting face of the front barrel, in order to provide a front end seal for sealing the optical devices and electrical devices downstream of the transparent cover assembly in the barrel body. Using the sealing ring method can ensure the waterproof properties of the video camera, having a compact structure and saving space without changing the external shape and size of the video camera, and reducing the risk of water leakage in the device caused by the adhesive failing. No adhesive is dispensed on the entire front end assembly of the video camera and the entire sealing system uses sealing rings for sealing, and the lenses inside the device are heated, such that the video camera is suitable for use in a variety of harsh usage environments.

Description

a camera

This application claims the priority of the Chinese patent application filed on March 8, 2018, the Chinese Patent Office, Application No. 201102318282.3, entitled "Two-color transparent cover and its front tube assembly, camera, monitoring system". The Chinese Patent Application, filed on March 8, 2018, with the application number of 2011018190602.6, entitled "A Front Tube Assembly and a Camera with It", claims priority to submit a Chinese patent on March 8, 2018. The priority of the Chinese patent application entitled "A front tube assembly and its camera, monitoring system" is filed on March 8, 2018, and the application number is 201101190601.1. The priority of the Chinese patent application entitled "a kind of camera" is required to be submitted to the Chinese Patent Office on March 8, 2018, and the application number is 201820318096.X, the invention name is "camera and its monitoring system". The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference.

Technical field

The present application relates to the field of video surveillance technologies, and in particular, to a video camera.

Background technique

The ambient temperature of the existing cameras is mostly -30 ° C to 60 ° C, mainly because the waterproof structure of the camera is sealed by glue in a limited space, so the nominal temperature of the glue determines the environment in which the camera is used. In addition, the camera can only be used to meet the daily use conditions, and cannot meet the complicated and harsh environment.

Accordingly, it is desirable to have a technical solution to overcome or at least mitigate at least one of the above disadvantages of the prior art.

Summary of the invention

It is an object of the present application to provide a camera that overcomes or at least mitigates at least one of the above-discussed deficiencies of the prior art.

In order to achieve the above object, in a first aspect, the present application provides a camera, the camera comprising: a lens assembly; a front barrel assembly; and a rear barrel assembly, the rear barrel assembly and the front barrel assembly forming a receiving lens assembly The front tube assembly includes: a front tube having a mounting surface, the mounting surface is provided with a third window through hole and a third complementary light through hole; the window body, the window body passes a first sealing ring is mounted to the third window through hole, and the window body and the third window through hole form a light incident channel, and light reflected by the object to be imaged is collected by the lens after the light incident channel; the lens body The lens body is mounted to the third complementary light through hole through a second sealing ring, and the lens body and the third complementary light through hole form a light exit passage through which light emitted by the light supplementing element is emitted The channel is irradiated onto the object to be imaged; the size of the third window through hole is adapted to the angle of view of the lens in the lens assembly, and the diameter of the third complementary light through hole is not less than the first Setting a value, the first preset value and The mounting space of the lens body on the mounting surface and the manner in which the lens body is mounted;

In conjunction with the first aspect, in a possible embodiment, the camera further includes:

a cover platen, the cover plate is disposed upstream of the mounting surface of the front tube in such a manner that the window body and the lens body are axially pressed; the cover plate is provided with a fourth window through hole and a fourth cover a light through hole, wherein the fourth window through hole is aligned with the third window through hole, and the fourth window through hole and the window body and the third window through hole sequentially form the light incident channel; The four complementary light through holes are aligned with the third complementary light through holes, and the third complementary light through holes and the lens body and the fourth complementary light through holes sequentially form the light exit passage; the object to be imaged is located The front barrel assembly is external.

In conjunction with the first aspect and the first embodiment of the first aspect, in the second embodiment, the number of the lens bodies is four, and are circumferentially arranged at the four corners of the window body.

In combination with the first aspect, in the third embodiment, the number of the lens bodies is two, which are respectively disposed above and below the window body.

In connection with the third embodiment of the first aspect, in the fourth embodiment, the lens body is disposed at a position in which the window body is centered.

In conjunction with the fourth embodiment of the first aspect, in the fifth embodiment, the shape of the third fill-through hole is a racetrack shape, and the lens body includes a combined lamp cup lens.

In combination with the first aspect and the first embodiment of the first aspect, in the sixth embodiment, the camera further includes a temperature adjustment device for raising or lowering the temperature of the lens and a temperature for detecting and outputting the temperature of the lens sensor.

In conjunction with the sixth embodiment of the first aspect, in the seventh embodiment, the temperature adjustment device is detachably coupled to the lens holder; the temperature adjustment device includes a U shape made of a heat conductive material a plate, the outer surface of the U-shaped plate is wound with a metal wire, three sides of the U-shaped plate are attached to the surface of the lens holder, and the lens holder and the lens are mutually heat-transmitted through the lens holder Transfer heat.

In conjunction with the first aspect, in the eighth embodiment, the camera further includes:

a spacer for preventing light directly passing through the light exit passage from entering the light incident passage;

The window body, the lens body and the aperture are integrally formed.

With reference to the eighth embodiment of the first aspect, in the ninth embodiment, the aperture spacer is a ring-shaped structure disposed between the window body and the lens body and made of a light-blocking material, The light-incident end surface of the light-shielding ring is joined to the light-emitting side surface of the window body, and the outer side wall of the window body is flush with the outer side wall of the light-shielding ring in the circumferential direction.

With reference to the ninth embodiment of the first aspect, in the tenth embodiment, the thickness of the aperture ring extending from the end face of the light incident end to the end face of the light exit end is based on the light exit point of the lens of the camera to the light of the window body The distance of the exit surface and the field of view of the lens are determined.

With reference to the tenth embodiment of the first aspect, in the eleventh embodiment, a portion of the outer sidewall of the aperture ring adjacent to the end surface of the light-emitting end is provided with a bead, and an end surface of the light-incident end is disposed to be inward The recessed step end surface, the light-emitting side surface of the window body is provided with a boss adapted to the end surface of the light-incident end.

With reference to any one of the twelfth to sixteenth embodiments of the first aspect, in the twelfth embodiment, the plurality of the light exit channels are centered on the light incident channel, surrounding the The light incident channels are circumferentially spaced apart.

In conjunction with the first aspect, in the thirteenth embodiment, the front barrel assembly further includes:

a two-color transparent cover plate, the two-color transparent cover plate is provided with a second window through hole and a second complementary light through hole;

The window body and the lens body are mounted in the front barrel through the third sealing ring 3, and are axially compressed by the two-color transparent cover pressure plate upstream of the mounting surface.

In conjunction with the thirteenth embodiment of the first aspect, in the fourteenth embodiment, the second window through hole is aligned with the first window through hole, and the second window through hole is formed with the window body for The light reflected by the object to be image enters the light incident channel of the first window through hole; the second complementary light through hole is aligned with the first complementary light through hole, and the first complementary light through hole is formed with the lens body for the front tube The light emitted inside the component illuminates the light exit passage of the object to be imaged through the second fill light through hole; the object to be imaged is located outside the front barrel assembly.

In conjunction with the fourteenth embodiment of the first aspect, in the fifteenth embodiment, the aperture spacer is a ring-shaped structure disposed between the window body and the lens body and made of a light-shielding material, and the aperture is inserted. The light end face is joined to the light exit side of the window body, and the outer side wall of the window body is flush with the outer side wall of the light barrier in the circumferential direction.

In conjunction with the fifteenth embodiment of the first aspect, in the sixteenth embodiment, the thickness of the aperture extending from the end face of the optical entrance end to the end face of the light exit end is based on the exit point of the lens of the camera to the light exit surface of the window body The distance and the angle of view of the lens are determined.

With reference to the sixteenth embodiment of the first aspect, in the seventeenth embodiment, a portion of the outer side wall of the aperture ring adjacent to the end surface of the light end end is provided with a convex ring, and an end surface of the light entrance end is disposed as an end surface of the step recessed inwardly. The light-emitting side of the window body is provided with a boss adapted to the end face of the light end.

With reference to any one of the thirteenth to seventeenth embodiments of the first aspect, in the eighteenth embodiment, the plurality of light exit passages are centered on the light incident passage, and circumferentially spaced around the light incident passage Settings.

The present application seals the transparent cover assembly to the mounting surface of the front barrel by a sealing ring to provide a front end seal to the optics downstream of the transparent cover assembly and the seal of the electrical device in the barrel. The seal sealing method can ensure the waterproof performance of the camera. Under the same shape of the same camera, the structure is compact, saves space, and reduces the risk of water leakage caused by glue failure. Since the entire camera front end component is not dispensed, the entire sealing system is sealed with a sealing ring, and the lens inside the device is heated, which can be applied to a variety of harsh environments.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application and the technical solutions of the prior art, the following description of the embodiments and the drawings used in the prior art will be briefly introduced. Obviously, the drawings in the following description are only Some embodiments of the application may also be used to obtain other figures from those of ordinary skill in the art without departing from the scope of the invention.

1a is a schematic exploded view of a camera provided with an integrally formed two-color transparent cover provided by the present application;

Figure 1b is a schematic exploded view of the camera in which two lens bodies are arranged along the circumference of the window body in the two-color transparent cover on the basis of the camera shown in Figure 1a;

1c is a schematic structural view of a camera in which a circular window body in a two-color transparent cover is changed to a rectangular window body and the number of lens bodies is changed to two on the basis of the camera shown in FIG. 1b;

Figure 2a is an exploded perspective view of the front barrel assembly of Figure 1a;

Figure 2b is an exploded perspective view of the front barrel assembly of Figure 1c;

Figure 3a is a schematic structural view of the mounting surface of the front cylinder of Figure 1b;

Figure 3b is a schematic structural view of the mounting surface of the front cylinder of Figure 1c;

Figure 3c is a front elevational view of the combined lamp cup of Figure 1b;

Figure 3d is a schematic cross-sectional view taken along line A-A of Figure 3c;

Figure 3e is a perspective view of the combined lamp cup of Figure 1b;

4 is a schematic structural view of a lens assembly in the camera shown in any of FIGS. 1a-1c;

Figure 5 is a schematic view showing the positional arrangement relationship between the two-color transparent cover and the lens of Figure 1a;

Figure 6a is a perspective view of the integrally formed two-color transparent cover of Figure 1a;

Figure 6b is a front elevational view of the integrally formed two-color transparent cover of Figure 1a;

Figure 6c is a schematic cross-sectional view taken along line A-A of Figure 6b.

Reference mark:

1	Two-color transparent cover	2	Front tube
3	Third seal	4	Temperature regulating device
5	Lens mount	6	Lens assembly
7	Filling element	8	Two-color transparent cover plate
9	Infrared cover	10	Rear cylinder

11	Window body	12	Lens body
13	Sunshade	61	Lens
twenty one	Mounting surface	twenty two	First window through hole
twenty three	First fill light through hole	81	Second window through hole
82	Second fill light through hole	111	The light side of the window body
112	Outer side wall of the window body	113	Boss
114	The light side of the window body	131	The entrance end of the aperture of the aperture
132	Outer sidewall of the aperture	133	The end of the light exit end of the aperture
134	Coil	In’	Incident light direction
1'	Window body	2'	Front tube
4’	Temperature regulating device	5’	Lens mount
6’	Lens assembly	7’	Filling element
8'	Cover plate	9'	Infrared cover
10’	Rear cylinder	13’	Sunshade
14’	Lens body	15’	First seal
16’	Second seal	twenty one'	Third window through hole
twenty two'	Third fill light through hole	81’	Fourth window through hole
82’	Fourth fill light through hole	In"	Incident light direction
1"	Window body	2"	Front tube
4"	Temperature regulating device	5"	Lens mount
6”	Lens assembly	7"	Filling element
8"	Cover plate	9"	Infrared cover
10"	Rear cylinder	13"	Sunshade
14"	Lens body	15”	Fourth seal
16"	Fifth seal	twenty one"	Fifth window through hole
twenty two"	Fifth fill light through hole	81"	Sixth window through hole
82"	Sixth fill light through hole

Detailed ways

In the drawings, the same or similar elements are used to denote the same or similar elements or elements having the same or similar functions. The embodiments of the present application are described in detail below with reference to the accompanying drawings.

In the description of the present application, the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", " The orientation or positional relationship of the "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present application and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the scope of the application.

The camera provided by the embodiment of the present application includes a front cavity formed by the front barrel assembly and the rear barrel assembly, and the rear barrel assembly and the front barrel assembly. Wherein, the front tube assembly comprises a front tube and a two-color transparent cover. The two-color transparent cover includes a window body and a lens body. The structure and position of the window body and the lens body may be different according to different application scenarios. The possible structure of the camera provided by the present application will be described below in conjunction with specific embodiments.

Embodiment 1:

The camera includes a barrel body formed by a connection of a front barrel assembly and a rear barrel assembly to provide a sealed machine cavity. The sunshade 13 is fixed on the top of the fuselage, which not only can be waterproof and anti-exposure, but also makes the overall appearance of the camera more beautiful. Wherein: the front tube assembly comprises a front tube 2 and an infrared transparent cover 9 disposed in the front tube 2 and axially from front to back, a transparent cover assembly and a light-filling member 7, the rear tube assembly including the rear tube 10 and being disposed behind The lens assembly 6 in the cartridge 10, the lens assembly 6 includes a lens 61. The lens assembly 6 and the fill light element 7 are arranged downstream of the transparent cover assembly.

In the present application, "front" and "back" are determined according to the direction of the light, and generally the light is incident into the lens 61 in a single direction from the outside to the inside (as indicated by the arrow in in FIG. 1), and is collected by the lens 61. Moreover, the "upstream" and "downstream" mentioned in the text are based on the direction indicated by the arrow in Fig. 1. For example, the front tube 2 is located upstream of the rear tube 10, and the two-color transparent cover 1 is located downstream of the two-color transparent cover plate 8.

As shown in FIG. 2a, the front tube 2 of the camera provided in this embodiment has a mounting surface 21, and the mounting surface 21 is provided with a first window through hole 22 and a first complementary light through hole 23. When the object to be imaged is photographed, the light reflected by the object to be imaged enters the first window through hole 22 in the direction indicated by the arrow in in FIG. 1 to be collected by the lens 61. In the case where the ambient light of the object to be imaged is dark, the light-filling element 7 is turned on, and the light emitted by the light-filling element 7 is in the opposite direction to the direction indicated by the arrow in in FIG. 1 via the first complementary light-passing hole. 23 is irradiated onto the object to be imaged to enhance the illumination intensity of the illumination environment of the object to be imaged. The object to be imaged is located outside the front barrel assembly.

The transparent cover assembly of the camera is hermetically mounted to the mounting surface 21 of the front barrel 2 by a third sealing ring 3. The transparent cover assembly includes a two-color transparent cover 1 and a two-color transparent cover platen 8, which is sealingly mounted in the front barrel 2 and is axially compressed by the two-color transparent cover plate 8 upstream of the mounting surface 21. among them:

The two-color transparent cover plate 8 is provided with a second window through hole 81 and a second complementary light hole 82. The second window through hole 81 is aligned with the first window through hole 22, and the second window through hole 81 is formed with the two-color transparent cover 1 for The light reflected by the object to be image enters the light incident channel of the first window through hole 22, and then the light reflected by the object to be imaged is sequentially passed through the second window through hole 81 and the two colors in the direction indicated by the arrow in in FIG. The transparent cover 1 enters the first window through hole 22 to be collected by the lens 61.

The second fill light through hole 82 is aligned with the first fill light through hole 23, and the second fill light through hole 82 and the two-color transparent cover 1 are formed for the light emitted from the inside of the front tube assembly to illuminate the object to be imaged through the fill light through hole 23. After the light-filling element 7 is turned on, the light emitted by the light-filling element 7 is sequentially passed through the first complementary light-passing hole 23 and the two-color transparent cover 1 in the opposite direction to the direction indicated by the arrow in in FIG. The second complementary light through hole 82 is emitted from the camera and irradiated onto the object to be imaged to enhance the illumination intensity of the illumination environment of the object to be imaged.

In this embodiment, by integrally molding the window body 11 and the lens body 12, the two-color transparent cover 1 can be sealingly mounted on the front tube 2 by a sealing ring to oppose the optical device and the electric appliance downstream of the two-color transparent cover 1 in the cylinder. The seal of the piece provides a front end seal. The seal sealing method can ensure the waterproof performance of the camera (IP67). Under the same size of the same camera, the structure is compact, saves space, and reduces the risk of water leakage caused by glue failure. Since the entire camera front tube assembly is dispensed, the entire sealing system is sealed with a sealing ring, and the lens inside the device is heated, which can be applied to a variety of harsh environments.

As shown in FIG. 6a and FIG. 6b, in one embodiment, the two-color transparent cover 1 includes a window body 11 and a lens body 12. The material of the window body 11 may be a hardened PC, but is not limited thereto. The window body 11 forms a light incident passage with the second window through hole 81 and the first window through hole 22. The lens body 12 is disposed downstream of the window body 11, and the lens body 12 forms a light exit passage with the second fill light through hole 82 and the first fill light through hole 23. The two-color transparent cover 1 further includes a spacer 13 for preventing light directly entering the light incident passage through the light exit passage.

The center line direction of the front cylinder 2 and the rear cylinder 10 is "axial direction", and the direction of rotation about the center line of the front cylinder 2 and the rear cylinder 10 is "circumferential direction". Since the window body 11 and the lens body 12 are both transparent, the two-color injection molding process is used in this embodiment to form the window body 11 and the aperture stop 13, so that the light of the lens body 12 can be effectively prevented from directly entering the window body 11. Thereby, it directly enters the lens 61, reducing the possibility that the captured image may be whitened due to overexposure.

In one embodiment, the plurality of light exit channels are centered on the light incident channel and circumferentially spaced around the light incident channel to achieve uniform fill light. For example, the number of the second complementary light through holes 82 on the two-color transparent cover plate 8 in the figure is four, which are respectively arranged at the four corners of the second window through hole 81. Correspondingly, the fill light element 7 is provided with four fill light lamps 71 corresponding to the second fill light through holes 82. When mounted, each fill light 71 is aligned with a second fill light through hole 82 to It is ensured that the light emitted from the fill lamp 71 is emitted from the second fill-through hole 82. Of course, the number and position of the second fill-through holes 82 can be appropriately adjusted according to actual conditions. For example, the number of the second fill-through holes 82 is two, which are respectively disposed at the centers of the upper and lower portions of the second window through-hole 81. . Other numbers and positions may be used according to actual needs, and this embodiment does not limit this.

As shown in FIG. 6c, in one embodiment, the aperture 13 is a ring-like structure disposed between the window body 11 and the lens body 12 and made of a light-blocking material, and the light-incident end surface 131 of the aperture 13 is joined. To the light exit side 111 of the window body 11, the outer side wall 112 of the window body 11 is flush with the outer side wall 132 of the aperture stop 13 in the circumferential direction. The aperture 13 can be the black with the best light absorption effect, and can also be other dark colors that are opaque. The embodiment also has the advantages of less space utilization, more compact structure, and optical effect in a limited space range.

As shown in FIG. 5, in one embodiment, the thickness b of the aperture 13 extending from the light-incident end surface 131 to the light-emitting end surface 133 is based on the distance h from the exit point O of the lens 61 to the light-emitting surface of the window body 11 and The angle of view a of the lens 61 is determined. As can be seen from Fig. 5, the parameters h and a are mainly determined, and the thickness b can be obtained according to the principle of the triangle. The position of the exit point O of the lens 61 belongs to the lens 61 parameter. Further, the aperture 13 has an annular shape, and the diameter of the inner ring is determined by the angle of view a of the lens 61. Normally, the diameter of the inner ring is adapted to the angle of view a of the lens 61. The diameter of the outer ring of the aperture 13 is mainly determined by the limitation of the installation space in the case of ensuring the strength of the aperture 13 itself.

In one embodiment, the window body 11 and the aperture 13 are both circular in shape and are easy to manufacture. It can also be a rectangle or other shapes. The window body 11, the lens body 12, and the aperture 13 are integrally injection molded.

As shown in FIG. 6c, in an embodiment, a portion of the outer side wall 132 of the aperture 13 adjacent to the end surface 133 of the light-emitting end is provided with a bead 134, and an end surface 131 of the light-incident end is disposed as an end surface of the step recessed inward, and the window body 11 is The light exiting side 111 is provided with a boss 113 that fits into the end face 131 of the light end. By setting the step structure, on the one hand, it is advantageous to increase the contact area, make the structure more secure, and improve the structural strength, and on the other hand, can effectively intercept the light exiting the light exit channel into the light incident channel.

In one embodiment, the two-color transparent cover platen 8 axially presses the two-color transparent cover 1 to the front end of the front barrel 2 to seal the front end of the front barrel 2. This contributes to the further sealing performance of the third sealing ring 3.

As shown in FIG. 4, in one embodiment, the camera further includes a temperature adjustment device 4 that raises or cools the lens 61, and a temperature sensor that detects and outputs the temperature of the lens 61. Correspondingly, the control device can control the heating or cooling operation of the temperature adjusting device 4 based on the current temperature signal of the lens 61 output by the temperature sensor. The control device may be a single-chip microcomputer inside the camera, or may be an external control device. At this time, the external control device and the temperature sensor and the temperature adjustment device 4 wirelessly transmit signals.

In one embodiment, the temperature adjustment device 4 is detachably coupled to the lens mount 5, and the temperature adjustment device 4 transfers heat through the lens mount 5 and the lens 61 in a thermally conductive manner. Since the lens holder 5 is made of metal, the temperature adjusting device 4 can be a U-shaped plate made of a material having a good thermal conductivity (such as copper), and the outer surface of the U-shaped plate is wound with a metal wire. When installing, attach each side of the U-shaped plate to the lens holder 5. For example, when heating is required, the three sides of the U-shaped plate simultaneously heat the lens holder 5 to form a large-area surface contact, thereby improving heat transfer efficiency, thereby ensuring that the lens 61 can still work in a complicated environment. The area of each side of the U-shaped plate can be adjusted according to actual needs according to the shape and size of the lens 61 and the lens holder 5.

The working process of the camera provided by the present application can be as follows:

After the camera is powered on, the temperature sensor senses the internal temperature of the machine. If the temperature is low, the temperature adjustment device 4 starts to work, and the lens starts to heat up. When the temperature rises to the preset temperature, the lens 61 starts to work, and the light to be reflected by the object to be imaged Enter the lens, after a series of hardware and software processing, and finally form an image. Wherein, when the external light is weak, the light-filling element 7 starts to work, emits light (infrared light or white light), illuminates the object, and then repeats the above-mentioned imaging process.

Embodiment 2:

The camera illustrated in Figure 1b includes a barrel body formed by a connection of a front barrel assembly and a rear barrel assembly to provide a sealed machine cavity. The top of the fuselage is fixedly provided with a sunshade 13', which is not only waterproof and anti-exposure, but also makes the overall appearance of the camera more beautiful. Wherein: the front barrel assembly comprises a front barrel 2' and an infrared transparent cover 9' disposed in the 2' of the front barrel 2' and axially from front to back, a transparent cover assembly and a fill light element, and the rear barrel assembly includes a rear tube 10' and a lens assembly 6' disposed in the rear barrel 10', the lens assembly 6' includes a lens. The lens assembly 6' and the fill light element 7' are disposed downstream of the transparent cover assembly.

In the present application, "front" and "back" are determined according to the direction of the light, and usually the light is incident from the outside to the inside (as indicated by the arrow in' in Fig. 1b) to the lens in one direction, and is collected by the lens. Moreover, the "upstream" and "downstream" mentioned in the text are based on the direction indicated by the arrow in Fig. 1b. For example, the front cylinder 2' is located upstream of the rear cylinder 10', and the lens unit 6' is located downstream of the casing pressure plate 8'. The center line direction of the front cylinder 2' and the rear cylinder 10' is "axial direction", and the direction of rotation about the center line of the front cylinder 2' and the rear cylinder 10' is "circumferential direction".

As shown in Fig. 3a, the mounting surface of the front tube 2' of the camera provided in this embodiment is provided with a third window through hole 21' and a third complementary light through hole 22'. When the object to be imaged is photographed, the light reflected by the object to be imaged enters the third window through hole 21' in the direction indicated by the arrow in' in Fig. 3a, thereby being collected by the lens in the lens unit head 6'. In the case where the ambient light of the object to be imaged is dark, the fill light element 7' is turned on, and the light emitted by the fill light element 7' passes through the third fill light in the opposite direction as indicated by the arrow in' in Fig. 3a. The hole 22' is irradiated onto the object to be imaged to enhance the light intensity of the illumination environment of the object to be imaged. The object to be imaged is located outside the front barrel assembly.

The transparent cover assembly of the camera provided in this embodiment includes a window body 1' and a lens body 14'. The window body 1' is mounted to the third window through hole 21' through the first sealing ring 15', and the lens body 14' passes through the second The seal ring 16' is mounted to the third fill-through hole 22'.

In this embodiment, the first sealing ring 15' and the second sealing ring 16' are respectively mounted on the mounting surface of the front barrel 2' to the window body 1' and the lens body 14', so as to face the transparent cover assembly in the cylinder. The downstream optics and the sealing of the electrical components provide a front end seal. Sealed ring seals ensure the waterproof performance of the camera (IP67). With the same camera dimensions, the structure is compact, saves space, and reduces the risk of water leaks caused by glue failure. Since the entire camera front end component is not dispensed, the entire sealing system is sealed with a sealing ring, and the lens inside the device is heated, which can be applied to a variety of harsh environments.

In one embodiment, the number of lens bodies 14' is four, and is circumferentially arranged at the four corners of the window body 1', respectively. As shown in Fig. 3a, the window body 1' has a circular shape, and the lens body 14' has a circular shape. Correspondingly, the third window through hole 21' and the third complementary light through hole 22' are both circular. The cover pressing plate 8' is provided upstream of the mounting surface of the front cylinder 2' so as to press the window body 1' and the lens body 14' in the axial direction to seal the front end of the front cylinder 2'. This contributes to the further sealing performance of the third sealing ring 3'.

The cover pressing plate 8' is provided upstream of the mounting surface of the front cylinder 2' so as to press the window body 1' and the lens body 14' in the axial direction. Wherein, the cover pressing plate 8' is provided with a fourth window through hole 81' and a fourth complementary light through hole 82', wherein:

The fourth window through hole 81' is aligned with the third window through hole 21', and the fourth window through hole 81' and the window body 1' and the third window through hole 21' sequentially form a light incident passage, that is, the fourth window The through hole 81' and the window body 1' form a light incident passage for the light reflected by the object to be imaged to enter the third window through hole 21'. Then, the light reflected by the object to be imaged passes through the fourth window through hole 81' and the window body 1' in the direction indicated by the arrow in' in FIG. 3a, and enters the third window through hole 21', thereby being collected by the lens. .

The fourth fill light through hole 82 ′ is aligned with the third fill light through hole 22 ′, and the third fill light through hole 22 ′ and the lens body 14 ′ and the fourth fill light through hole 82 ′ sequentially form a light exit passage, that is, The third complementary light through hole 22 ′ and the lens body 14 ′ are formed for the light emitted from the inside of the front tube assembly to illuminate the light exiting passage of the object to be imaged through the fourth complementary light through hole 82 ′, and thus the light filling element 7 ′ After being turned on, the light emitted by the light-filling element 7' passes through the third complementary light-passing hole 22', the lens body 14', and the fourth complementary light-passing hole 82' in the opposite direction as indicated by the arrow in' in FIG. 3a. It is emitted from the camera and irradiated onto the object to be imaged to enhance the illumination intensity of the illumination environment of the object to be imaged.

In one embodiment, a plurality of lens bodies 14' are circumferentially spaced around the window body 1'. For example, the number of the second through holes 82' on the cover platen 8' in the figure is four, which are respectively arranged at the four corners of the first through holes 81'. Other numbers and positions are also possible, and this embodiment does not limit this. Preferably, in order to achieve the effect of uniform light filling, the four lens bodies 14' are distributed around the window body 1' at a uniform interval centering on the window body 1'. Then, the four lens areas are centered on the window area, and are circumferentially spaced around the window area to achieve uniform fill light.

In one embodiment, the connecting end of the lens body 14' is provided with a thread, the inner wall surface of the third fill light hole 22' is also provided with a thread, and the lens body 14' is screwed to the third fill light through hole 22'. The connection method provided by this embodiment is more flexible in assembly, and the window can be made very large. Moreover, when the lens body 14' and the third complementary light through hole 22' are screwed, the sealing ring between the lens body 14' and the third complementary light through hole 22' is compressed to provide a sealing function without using a separate cover. The pressure plate 8' is pressed in the axial direction.

It is to be noted that, in the above embodiments, the size of the third through-hole 21' is adapted to the angle of view of the lens in the lens unit 6'. In order to ensure that the light of the light-filling element can be completely transmitted through the third complementary light-transmitting through hole 22', the size of the third complementary light-transmitting through-hole 22' needs to be set as large as possible. Therefore, the diameter of the third complementary light-transmitting through-hole 22' is not less than The first preset value. The preset value also needs to match the installation space limitation and the mounting manner of the lens body 14'. For example, when the lens body 14' is screwed to the third fill light through hole 22', the dimensional requirements of the standard part of the screw member are taken into consideration. The first preset value may be M12. In the case where the lens body 14' is connected to the third fill-in hole 22' without being screwed, the first preset value is an empirical value, and the experimental data shows that the second preset value may be 13 mm.

As shown in Fig. 1b, in one embodiment, the camera further includes a temperature adjusting device 4' for raising or lowering the temperature of the lens and a temperature sensor (not shown) for detecting and outputting the temperature of the lens. Correspondingly, the control means can control the heating or cooling operation of the temperature adjusting means 4' based on the current temperature signal of the lens output by the temperature sensor. The control device may be a single chip microcomputer inside the camera or an external control device. At this time, the external control device and the temperature sensor and the temperature adjusting device 4' wirelessly transmit signals.

In one embodiment, the temperature adjustment device 4' is detachably coupled to the lens mount 5', and the temperature adjustment device 4' transfers heat to the lens through the lens mount 5' in a thermally conductive manner. Since the lens holder 5' is made of metal, the temperature adjusting device 4' can be made of a U-shaped plate made of a material having a good thermal conductivity such as copper or the like, and the outer surface of the U-shaped plate is wound with a metal wire. At the time of installation, each side of the U-shaped plate is attached to the lens mount 5'. For example, when heating is required, the three sides of the U-shaped plate simultaneously heat the lens holder 5' to form a large-area surface contact, thereby improving heat transfer efficiency, thereby ensuring that the lens can still work in a complicated environment. The area of each side of the U-shaped plate can be appropriately adjusted according to the shape and size of the lens and the lens holder 5'.

The working process of the camera provided by this application is as follows:

After the camera is powered on, the temperature sensor senses the internal temperature of the machine. If the temperature is low, the temperature adjustment device 4' starts to work, and the lens starts to heat up. When the temperature rises to the preset temperature, the lens starts to work, and the light reflected by the external object enters. The lens is processed through a series of hardware and software to form an image. Wherein, when the external light is weak, the fill light element starts to work, emits light (infrared light or white light), illuminates the object, and then repeats the above imaging process.

Embodiment 3:

The camera illustrated in Figure 1c includes a barrel body formed by a connection of a front barrel assembly and a rear barrel assembly to provide a sealed machine cavity. The sunshade 13" is fixed on the top of the fuselage, which not only can be waterproof and sun-proof, but also makes the overall appearance of the camera more beautiful. Among them: the front tube assembly includes the front tube 2" and is disposed in the front tube 2" 2" An axial through cover 9", a transparent cover assembly and a fill light element, the rear barrel assembly includes a rear barrel 10" and a lens assembly 6" disposed in the rear barrel 10", and the lens assembly 6" includes a lens. The lens assembly 6" and the fill light element 7" are arranged downstream of the transparent cover assembly.

In the present application, "front" and "back" are determined according to the direction of the light, and usually the light is incident from the outside to the inside (as indicated by the arrow in in Fig. 1c) to the lens in one direction, and is collected by the lens. References to "upstream" and "downstream" are referenced to the direction indicated by the arrows in Figure 1c. For example, the front barrel 2" is located upstream of the rear barrel 10" and the lens assembly 6" is located downstream of the cover plate 8". The center line direction of the front cylinder 2" and the rear cylinder 10" is "axial direction", and the direction of rotation about the center line of the front cylinder 2" and the rear cylinder 10" is "circumferential direction".

As shown in FIG. 3b, the mounting surface of the front tube 2" of the camera provided in this embodiment is provided with a fifth window through hole 21" and a fifth complementary light through hole 22". When the object to be imaged is photographed, the object to be imaged is photographed. The reflected light enters the fifth window through hole 21" in the direction indicated by the arrow in" in Fig. 3b, thereby being collected by the lens in the lens assembly head 6". In the case where the ambient light of the object to be imaged is dark, the fill light element 7" is turned on, and the light emitted by the fill light element 7" passes through the fifth fill light in the opposite direction as indicated by the arrow in" in Fig. 3b. The hole 22" is irradiated onto the object to be imaged to enhance the illumination intensity of the illumination environment of the object to be imaged. The object to be imaged is located outside the front barrel assembly.

The transparent cover assembly of the camera provided by this embodiment includes a window body 1" and a lens body 14", and the window body 1" is mounted to the fifth window through hole 21" through the fourth sealing ring 15", and the lens body 14" passes the fifth The seal ring 16" is mounted to the fifth fill light through hole 22".

In this embodiment, the fourth sealing ring 15" and the fifth sealing ring 16" are respectively mounted on the mounting surface of the front barrel 2" to the window body 1" and the lens body 14", respectively, to the downstream of the transparent cover assembly in the cylinder. The sealing of the optics and the electrical components provides a front-end seal. The seal is sealed to ensure the waterproof performance of the camera (IP67). The structure is compact, space-saving, and glue is reduced while the same camera dimensions are the same. The risk of equipment leakage due to failure. Because the entire camera front end component is not dispensed, the entire sealing system is sealed with a sealing ring, and the lens inside the device is heated, which can be applied to a variety of harsh environments.

The cover platen 8" is provided upstream of the mounting surface of the front tube 2" so as to press the window body 1" and the lens body 14" in the axial direction. Wherein, the cover body pressing plate 8" is provided with a sixth window through hole 81" and a sixth complementary light through hole 82", wherein:

The sixth window through hole 81" is aligned with the fifth window through hole 21", and the sixth window through hole 81" and the window body 1" and the fifth window through hole 21" sequentially form a light incident passage, that is, the sixth window The through hole 81" and the window body 1" form a light incident passage for the light reflected by the object to be imaged to enter the fifth window through hole 21". Then, the light reflected by the object to be imaged passes through the sixth window through hole 81" and the window body 1" in the direction indicated by the arrow in" in FIG. 1c, and enters the fifth window through hole 21", thereby being collected by the lens. .

The sixth complementary light through hole 82" is aligned with the fifth complementary light through hole 22", and the sixth complementary light through hole 82" and the lens body 14" and the fifth complementary light through hole 22" sequentially form a light exit passage, that is, The fifth complementary light through hole 22" and the lens body 14" are formed for the light emitted from the inside of the front tube assembly to illuminate the light exiting passage of the object to be imaged through the sixth complementary light through hole 82", and thus the light filling member 7" After being turned on, the light emitted by the light-filling element 7" sequentially passes through the fifth complementary light-passing hole 22", the lens body 14", and the sixth complementary light-passing hole 82" in the opposite direction indicated by the arrow in" in FIG. 1c. It is emitted from the camera and irradiated onto the object to be imaged to enhance the illumination intensity of the illumination environment of the object to be imaged.

In one embodiment, the plurality of lens bodies 14" are circumferentially spaced around the window body 1". For example, the number of the sixth complementary light through holes 82" on the cover platen 8" in the figure is two, which are respectively disposed at the centers of the upper and lower portions of the sixth window through hole 81". Other numbers and positions may be used. As long as it can better achieve the fill light effect.

In one embodiment, the number of lens bodies 14" is two, disposed above and below the window body 1", respectively. As shown in Fig. 2b, the window body 1" has a rectangular shape, and the two lens bodies 14" are disposed at a position centered on the window body 1". Of course, the two lens bodies 14" may be respectively disposed on the left side of the window body 1". And right side. Here, for convenience of description, "upper", "lower", "left", and "right" correspond to the upper, lower, left, and right sides of the paper, respectively. In addition, the number of lens bodies 14" is also It can be three or more than four, as long as it can achieve a better light-filling effect for the camera. In this embodiment, the window body 1" can be made very large, and the structural layout is more compact under the premise of ensuring the same size of the appearance. The smaller the number of the lens bodies 14", the number of the sealing rings is substantially reduced to some extent. It is beneficial to improve the sealing of the machine cavity.

As shown in Fig. 3c, Fig. 3d and Fig. 3e, the lens body 14" includes a combined lamp cup lens. The combination of the lamp cup lens is a product that can be directly purchased from the market, and will not be described here. This can ensure optical effects, high light extraction efficiency, less space utilization, more compact structure, more reliable waterproofing and lower cost.

It should be noted that, in each of the above embodiments, the size of the fifth through-hole 21" is adapted to the angle of view of the lens in the lens assembly 6".

In order to ensure that the light of the fill light element can be completely transmitted through the fifth fill light through hole 22", the size of the fifth fill light through hole 22" needs to be set as large as possible. Since the shape of the third complementary light through hole 22' is a racetrack shape, that is, two semicircles connected by two parallel straight lines at both ends, the diameters of the two semicircles of the third complementary light through hole 22' are not less than the second preset. value. The second preset value needs to match the installation space limit and the size of the combined lamp cup lens at the same time. Therefore, the second preset value is an empirical value, and the experimental data shows that the second preset value may be 13 mm.

As shown in FIG. 1c, in one embodiment, the camera further includes a temperature adjustment device 4" for raising or lowering the temperature of the lens and a temperature sensor (not shown) for detecting and outputting the temperature of the lens. The control device can control the temperature adjustment device 4" heating or cooling operation according to the current temperature signal of the lens output by the temperature sensor. The control device may be a single chip microcomputer inside the camera, or may be an external control device. At this time, the external control device and the temperature sensor and the temperature adjusting device 4" wirelessly transmit signals.

In one embodiment, the temperature adjustment device 4" is detachably coupled to the lens mount 5", and the temperature adjustment device 4" transfers heat to the lens through the lens mount 5" in a thermally conductive manner. Since the lens holder 5" is made of metal, the temperature adjusting device 4" can be made of a U-shaped plate made of a material having a good thermal conductivity (such as copper), and the outer surface of the U-shaped plate is wound with a metal wire. During installation, each side of the U-shaped plate is attached to the lens holder 5". For example, when heating is required, the three sides of the U-shaped plate simultaneously heat the lens holder 5" to form a large-area surface contact. Improve heat transfer efficiency and ensure that the lens can still work in complex environments. The area of each side of the U-shaped plate can be appropriately adjusted according to the shape and size of the lens and the lens holder 5".

The working process of the camera provided by this application is as follows:

After the camera is powered on, the temperature sensor senses the internal temperature of the machine. If the temperature is low, the temperature adjustment device 4" starts to work, and the lens starts to heat up. When the temperature rises to the preset temperature, the lens starts to work, and the light reflected by the external object enters. The lens is processed by a series of software and hardware to form an image. When the external light is weak, the fill light component starts to work, emits light (infrared light or white light), illuminates the object, and then repeats the above imaging process.

The invention also includes a monitoring system comprising a camera as described in the various embodiments above. The camera may include a visual sensor or a thermal sensor for capturing a visual image or a thermal image of the surveillance scene, which is highly demanding for waterproofing.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. It should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified, or equivalent of some of the technical features may be substituted; the modifications or substitutions do not deviate from the essence of the corresponding technical solutions. The spirit and scope of the technical solutions of the embodiments.

Claims (19)

1. A camera, comprising:

   Lens assembly

   Front barrel assembly;

   a rear cylinder assembly, the rear cylinder assembly and the front cylinder assembly form a hollow cavity for accommodating the lens assembly;

   Wherein the front barrel assembly comprises:

   a front cylinder having a mounting surface, wherein the mounting surface is provided with a third window through hole and a third complementary light through hole;

   a window body, the window body is mounted to the third window through hole through a first sealing ring, and the window body and the third window through hole form a light incident channel, and light reflected by the object to be imaged is incident through the light Collected by the lens after the channel;

   a lens body, wherein the lens body is mounted to the third complementary light through hole through a second sealing ring, and the lens body is screwed to the third complementary light through hole to form a light exit channel, and the light emitted by the light filling component Illuminating onto the object to be imaged through the light exit passage; the size of the third window through hole is adapted to the angle of view of the lens in the lens assembly, and the diameter of the third complementary light through hole Not less than the first preset value, the first preset value is related to the installation space of the lens body on the mounting surface and the mounting manner of the lens body.
2. The camera according to claim 1, wherein the camera further comprises:

   a cover platen, the cover plate is disposed upstream of the mounting surface of the front tube in such a manner that the window body and the lens body are axially pressed; the cover plate is provided with a fourth window through hole and a fourth cover a light through hole, wherein the fourth window through hole is aligned with the third window through hole, and the fourth window through hole and the window body and the third window through hole sequentially form the light incident channel; The four complementary light through holes are aligned with the third complementary light through holes, and the third complementary light through holes and the lens body and the fourth complementary light through holes sequentially form the light exit passage; the object to be imaged is located The front barrel assembly is external.
3. The video camera according to claim 1 or 2, wherein the number of the lens bodies is four, and is circumferentially arranged at four corners of the window body.
4. The video camera according to claim 1, wherein the number of the lens bodies is two, respectively disposed above and below the window body.
5. The video camera according to claim 4, wherein said lens body is disposed at a position in which said window body is centered.
6. The video camera according to claim 5, wherein said third fill-in aperture has a racetrack shape, and said lens body comprises a combined lamp cup lens.
7. The video camera according to claim 1 or 2, further comprising temperature adjusting means for raising or lowering the temperature of the lens, and a temperature sensor for detecting and outputting the temperature of the lens.
8. The video camera according to claim 7, wherein said temperature adjusting means is detachably coupled to the lens holder; said temperature adjusting means comprises a U-shaped plate made of a heat conductive material, said U shape The outer surface of the plate is wound with metal wires, and the three sides of the U-shaped plate are attached to the surface of the lens holder, and heat is transferred to the lens through the lens holder through the lens holder.
9. The camera of claim 1 wherein said camera further comprises:

   a spacer for preventing light directly passing through the light exit passage from entering the light incident passage;

   The window body, the lens body and the aperture are integrally formed.
10. The camera according to claim 9, wherein the spacer is a ring-shaped structure disposed between the window body and the lens body and made of a light-blocking material, the aperture of the aperture The end face of the light end is joined to the light exiting side of the window body, and the outer side wall of the window body is flush with the outer side wall of the light blocking ring in the circumferential direction.
11. The camera according to claim 10, wherein the thickness of the aperture extending from the end face of the light incident end to the end face of the light exit end is based on the distance from the exit point of the lens of the camera to the light exit face of the window body and The angle of view of the lens is determined.
12. The camera according to claim 11, wherein a portion of the outer side wall of the aperture ring adjacent to the end surface of the light-emitting end is provided with a bead, and an end surface of the light-incident end is disposed as an end surface of the step recessed inwardly, The light-emitting side of the window body is provided with a boss adapted to the end face of the light-incident end.
13. The video camera according to any one of claims 9 to 12, wherein a plurality of said light exit passages are centered around said light incident passage and circumferentially spaced around said light incident passage.
14. The camera of claim 1 wherein said front barrel assembly further comprises:

    a two-color transparent cover plate, the two-color transparent cover plate is provided with a second window through hole and a second complementary light through hole;

    The window body and the lens body are mounted in the front barrel through the third sealing ring 3, and are axially compressed by the two-color transparent cover pressure plate upstream of the mounting surface.
15. The camera according to claim 14, wherein the second window through hole is aligned with the first window through hole, and the second window through hole and the window body form light for reflecting by the object to be imaged a light entrance channel of the first window through hole; the second fill light through hole is aligned with the first fill light through hole, and the first fill light through hole and the lens body form a light for emitting light inside the front tube assembly via the second The fill light hole illuminates the light exit passage of the object to be imaged; the object to be imaged is located outside the front tube assembly.
16. The camera according to claim 15, wherein the aperture spacer is a ring-shaped structure disposed between the window body and the lens body and made of a light-blocking material, and the light-incident end surface of the aperture ring is joined to the window body. On the light-emitting side, the outer side wall of the window body is flush with the outer side wall of the aperture ring in the circumferential direction.
17. The camera according to claim 16, wherein the thickness of the aperture extending from the end face of the light incident end to the end face of the light exit end is based on a distance from an exit point of the lens of the camera to a light exit face of the window body and an angle of view of the lens. determine.
18. The camera according to claim 17, wherein a portion of the outer side wall of the aperture ring adjacent to the end surface of the light-emitting end is provided with a convex ring, and an end surface of the light-incident end is disposed as an end surface of the step recessed inward, and the light-emitting side of the window body is disposed A boss that is fitted into the end face of the optical end.
19. A camera according to any one of claims 14 to 18, wherein the plurality of light exit passages are centered on the light incident passage and circumferentially spaced around the light incident passage.

Images