CN216391178U - Camera and camera housing assembly - Google Patents
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- CN216391178U CN216391178U CN202122811319.0U CN202122811319U CN216391178U CN 216391178 U CN216391178 U CN 216391178U CN 202122811319 U CN202122811319 U CN 202122811319U CN 216391178 U CN216391178 U CN 216391178U
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Abstract
The application provides a camera and a camera housing assembly. The camera comprises an outer shell component, an electronic device and a heat dissipation metal plate, wherein the outer shell component comprises an accommodating cavity, an outer shell made of plastic materials and an inner shell made of heat conduction plastic materials, the outer shell is located on the outer side of the inner shell, and the inner shell and the outer shell are kept relatively fixed through a connecting structure; the heat dissipation panel beating with electron device accept in accept the chamber, the heat dissipation panel beating with electron device and the inner shell thermal conduction for with the heat transfer that electron device produced gives the inner shell. According to the scheme, on the premise of meeting the heat dissipation requirement, the plastic is used for replacing steel, and the manufacturing cost of the camera is reduced.
Description
Technical Field
The application relates to the technical field of monitoring, in particular to a camera and a shell assembly of the camera.
Background
The camera is widely applied to the monitoring field, an electronic device is arranged in the camera, and the performance of the camera is influenced by overhigh temperature rise of the electronic device. In order to meet the heat dissipation requirement, some cameras adopt shells made of metal materials, but the shells made of metal materials are high in cost, poor in corrosion resistance and not environment-friendly in production process.
SUMMERY OF THE UTILITY MODEL
The present application provides an improved camera and a housing assembly for a camera.
A camera comprises an outer shell component, an electronic device and a heat dissipation metal plate, wherein the outer shell component comprises an accommodating cavity, an outer shell made of plastic materials and an inner shell made of heat conduction plastic materials, the outer shell is located on the outer side of the inner shell, and the inner shell and the outer shell are kept relatively fixed through a connecting structure; the heat dissipation panel beating with electron device accept in accept the chamber, the heat dissipation panel beating with electron device and the inner shell thermal conduction for with the heat transfer that electron device produced gives the inner shell.
Optionally, the connecting structure includes a concave portion and a convex portion with matched shapes, one of the inner shell and the outer shell is provided with the concave portion, the other is provided with the convex portion, and the convex portion is arranged in the concave portion.
Optionally, the housing assembly has a central shaft, and the connecting structures are provided in multiple groups, and the multiple groups of the connecting structures are disposed around the central shaft at intervals between the inner housing and the outer housing.
Optionally, along the direction of center pin, the internal surface of shell forms the inboard catastrophe surface that radial dimension is unequal, the surface of inner shell forms the outside catastrophe surface that radial dimension is unequal, one of depressed part and the bulge is located inboard catastrophe surface, and the other is located outside catastrophe surface.
Optionally, the camera includes a lens assembly, the recessed portion is configured as a U-shaped groove, the protruding portion is configured as a U-shaped protrusion, and an opening of the U-shaped groove faces the front end of the lens assembly.
Optionally, the camera further comprises a heat conducting pad, the heat conducting pad is clamped between the heat dissipation metal plates and the inner shell, the heat dissipation metal plates and one end, contacted with the heat conducting pad, of the heat dissipation metal plates form a plurality of branch metal plates which are arranged side by side and are separated from each other, and the shapes of the branch metal plates are matched with the shapes of the inner shell.
Optionally, the outer shell includes a fixing column for fixing the inner component, the inner shell includes a reinforcing surrounding wall, and the reinforcing surrounding wall covers or partially covers the outer side of the fixing column; and/or
The shell with the shell passes through double-shot moulding integrated into one piece.
Optionally, the housing assembly includes a first housing and a second housing that are separately disposed, the first housing is provided with a window for facing the lens assembly, the electronic device is disposed in the first housing, and the inner housing is attached to an inner surface of the first housing.
Optionally, the shape of the outer surface of the inner shell matches the shape of the inner surface of the first outer shell, and the outer surface and the inner surface are mutually attached.
Optionally, the first outer shell includes a joint surface in sealing joint with the second outer shell, and a height difference is provided between one end of the inner shell close to the second outer shell and the joint surface to form a gap for accommodating a sealing ring for sealing the first outer shell and the second outer shell.
The present application also provides a housing assembly of a camera, comprising:
an inner shell having a thermally conductive plastic material;
a first housing having a plastic material;
wherein, the outer shell cladding the inner shell constitutes to have open first and accepts the chamber, the inner shell is injectd: at the end face of the open end, the end face of the first outer shell is higher than the end face of the inner shell;
the inner surface of the first outer shell is provided with a first connecting structure, the outer surface of the inner shell is provided with a second connecting structure, and the first connecting structure receives the second connecting structure, so that the outer surface of the inner shell and the inner surface of the first outer shell form a heat conduction channel.
Optionally, one of the first connecting structure and the second connecting structure is provided with a recess, and the other is provided with a protrusion adapted to the recess, and the recess receives the protrusion.
Optionally, the first connecting structure is the protrusion, and the second connecting structure is the recess, and the recess receives the protrusion.
Optionally, the inner shell and the first outer shell are integrally formed by double-shot molding.
Optionally, a height difference between the end surface of the first outer shell and the end surface of the inner shell is greater than 3 mm.
Optionally, the depth height W of the inner shell is defined to satisfy: the depth height is inversely related to a convective heat transfer coefficient of a housing assembly of the camera.
Optionally, the depth height W of the inner shell is defined to satisfy:
wherein h is the convective heat transfer coefficient; g is the acceleration of gravity; alpha is alphaVIs the coefficient of bulk expansion; v is the dynamic viscosity coefficient; delta t is the excess temperature; α is thermal diffusivity.
Optionally, the housing assembly further comprises a second housing, and a sealing ring mounting groove is formed in an end surface of the first housing, and a sealing ring is disposed in the sealing ring mounting groove, so that the first housing is in sealing engagement with the second housing.
The technical scheme provided by the application can at least achieve the following beneficial effects:
the application provides a camera and shell subassembly of camera adopts the shell subassembly of plastics material, and wherein the shell subassembly has adopted the outer shell of plastics material and the combination scheme of the inner shell of heat conduction plastics material, and the shell passes through connection structure with the inner shell and keeps relatively fixed. According to the scheme, on the premise of meeting the heat dissipation requirement, the plastic is used for replacing steel, and the manufacturing cost of the camera is reduced.
Drawings
FIG. 1 is a schematic view of a camera shown in an exemplary embodiment of the present application;
FIG. 2 is a cross-sectional view of the camera shown in FIG. 1;
FIG. 3 is a schematic view of an inner shell of an outer shell assembly;
FIG. 4 is a schematic view of a housing of the housing assembly;
FIG. 5 is a cross-sectional view of the inner shell engaged with the outer shell;
fig. 6 is an orthographic view of the inner housing directed from the front end to the rear end of the lens assembly in the direction of the central axis;
fig. 7 is an orthographic view of the housing directed from the rear end of the lens assembly to the rear end along the central axis direction;
FIG. 8 is a schematic view of an outer surface of the inner shell;
FIG. 9 is a cross-sectional view of the housing;
FIG. 10 is a schematic view of the bonding of a heat-dissipating metal plate to a thermal pad;
FIG. 11 is a schematic view of a heat dissipating surface on a single side of the inner shell;
FIG. 12 is a graph of the total thermal resistance Ra fitted to the single-sided bonding area Ap of the inner shell and the thermally conductive pad;
FIG. 13 is a cross-sectional view of the inner shell engaged with the outer shell;
FIG. 14 is a top view of the inner shell engaged with the outer shell;
fig. 15 is yet another cross-sectional view of the inner shell engaged with the outer shell.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with aspects of the present application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one, and if only "a" or "an" is denoted individually. "plurality" or "a number" means two or more. Unless otherwise specified, "front", "back", "lower" and/or "upper", "top", "bottom", and the like are for ease of description only and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a camera 100 according to an embodiment of the present disclosure. Fig. 2 is a sectional view of the video camera 100 shown in fig. 1.
The present application provides a camera 100, the camera 100 including but not limited to a dome camera, a gun camera. The present application will be described in detail with a hemispherical camera as an example.
The camera 100 includes a housing assembly 10, a lens assembly 20, an electronic device 30, and a heat dissipating sheet metal 40. The housing assembly 10 includes an accommodating cavity 101, the lens assembly 20, the electronic device 30 and the heat dissipation metal plate 40 are all accommodated in the accommodating cavity 101, and the accommodating cavity 101 is a sealed cavity to realize dust prevention and water prevention. The housing assembly 10 is provided with a window 102 facing the lens assembly 20 for light to enter. The housing assembly 10 is formed in a solid structure having a central axis a, and the optical axis of the lens assembly 20 coincides with the direction of the central axis a. In this embodiment, the optical axis of the lens assembly 20 is parallel to the central axis a.
The outer housing assembly 10 includes an inner housing 103 and an outer housing 104. The shell 104 is made of plastic, the shell 104 can be made of plastic materials which have high strength and good weather resistance and can be used as a stress piece, and the shell 104 mainly plays a role in protection and meets the requirements of water resistance, explosion resistance, corrosion resistance and the like. The inner casing 103 is made of a heat conductive plastic, for example, a plastic substrate is filled with a heat conductive filler to improve its heat conductive performance, and the inner casing 103 mainly plays a role in heat conduction and heat dissipation. The outer shell 104 covers the outer side of the inner shell 103, and the shape of the outer shell 104 is matched with the shape of the inner shell 103, so that the outer surface of the inner shell 103 is attached to the inner surface of the outer shell 104, the joint area is increased, and the heat transfer efficiency is improved. Meanwhile, the inner shell 103 and the outer shell 104 are kept relatively fixed through a connecting structure, and the inner shell 103 and the outer shell 104 are prevented from falling off. In one embodiment, the inner housing 103 and the outer housing 104 may be integrally molded by two-shot molding, but are not limited thereto.
The camera 100 further comprises a main board assembly 50, the electronic device 30 is disposed on the main board assembly 50, and the electronic device 30 comprises an image sensor and a processing chip. In this embodiment, the image sensor and the processing chip share the same printed circuit board. The electronic device 30 generates heat during operation, and heat dissipation of the electronic device 30 is required. The heat dissipation panel beating 40 combines with electron device 30 and inner shell 103 for electron device 30, heat dissipation panel beating 40 and inner shell 103 three realize thermal conduction, make the heat that electron device 30 self produced transmit for inner shell 103 through heat dissipation panel beating 40, and inner shell 103 evenly disperses the heat to further conduct to outer shell 104, radiate to the external world through outer shell 104 in order to realize the heat dissipation.
The application provides a camera 100 adopts plastics material's shell subassembly 10, and wherein shell subassembly 10 has adopted plastics material's shell 104 and the combination scheme of heat conduction plastics material's inner shell 103, and wherein, the material of shell 104 can satisfy intensity, waterproof and anti-riot demand, and the material of inner shell 103 satisfies the heat dissipation demand, has realized with low costs, good performance, manufacturing process environmental protection. Meanwhile, the inner shell 103 and the outer shell 104 are kept relatively fixed through a connecting structure, so that the risk of falling off of the inner shell 103 and the outer shell 104 is reduced or even avoided.
Referring to fig. 3 to 5, fig. 3 is a schematic view of the inner housing 103. Fig. 4 is a schematic view of the housing 104. Fig. 5 is a sectional view of the inner case 103 and the outer case 104 in a state of engagement. In one embodiment, the connecting structure comprises a recess and a protrusion with matched shapes, one of the inner shell 103 and the outer shell 104 is provided with the recess, the other is provided with the protrusion, and the protrusion is arranged in the recess. In one embodiment, the recess is implemented as a groove 1030 and the protrusion is implemented as a protrusion 1040, one of the inner shell 103 and the outer shell 104 is provided with the groove 1030, the other is provided with the protrusion 1040, and the protrusion 1040 is disposed in the groove 1030. The connecting structure is simple and convenient to realize. The groove 1030 and the protrusion 1040 may be integrally formed with the inner case 103 and the outer case 104 by injection molding. In this embodiment, the outer surface of the inner housing 103 is provided with a groove 1030, and the inner surface of the outer housing 104 is provided with a protrusion 1040, or vice versa.
In order to improve the stability of the connection between the inner shell 103 and the outer shell 104, a plurality of sets of connection structures may be provided, the sets of connection structures are arranged at intervals around the central axis a between the inner shell 103 and the outer shell 104, and the grooves 1030 and the protrusions 1040 are arranged in a one-to-one correspondence. Specifically, the outer shell 104 includes an inner attaching surface 1042 attached to the inner shell 103, the inner shell 103 includes an outer attaching surface 1032 attached to the outer shell 104, the inner attaching surface 1042 is attached to the outer attaching surface 1032 and extends around the central axis a, and the plurality of sets of connecting structures are disposed around the central axis a on the outer attaching surface 1032 and the inner attaching surface 1042. For example, the outer abutment surface 1032 is provided with recesses 1030 and the inner abutment surface 1042 is provided with projections 1040. The multiple sets of connection structures can enable the inner shell 103 and the outer shell 104 to be engaged at multiple positions in the circumferential direction, and ensure the stability of the relative positions of the inner shell 103 and the outer shell 104 and the reliability of connection.
In one embodiment, along the direction of the central axis a, the inner surface of the outer shell 104 forms an inner step surface with different radial dimensions, the outer surface of the inner shell 103 forms an outer step surface with different radial dimensions, one of the concave portion and the convex portion is disposed on the inner step surface, and the other is disposed on the outer step surface. Specifically, the outer surface of the inner housing 103 includes an outer cylindrical surface 1031 and an outer conical surface 1033 extending around the central axis a and connected to each other, and an abrupt outer side surface is formed at the connection portion of the outer cylindrical surface 1031 and the outer conical surface 1033. The inner surface of the housing 104 includes an inner cylindrical surface 1041 and an inner conical surface 1043 extending around the central axis a, and an inner abrupt surface is formed at the junction of the inner cylindrical surface 1041 and the inner conical surface 1043. The outer cylindrical surface 1031 is attached to the inner cylindrical surface 1041, and the outer conical surface 1033 is attached to the inner conical surface 1043. One of the groove 1030 and the protrusion 1040 is disposed on the inner abrupt surface, i.e., the junction between the inner cylindrical surface 1041 and the inner conical surface 1043, and the other is disposed on the outer abrupt surface, i.e., the junction between the outer cylindrical surface 1031 and the outer conical surface 1033. That is, one part of the groove 1030 and the protrusion 1040 is arranged on the cylindrical surface, the other part is arranged on the tapered surface, and since the surfaces of the groove 1030 and the protrusion 1040 are in different orientations, which makes the groove 1030 and the protrusion 1040 in different orientations in the space, the groove 1030 and the protrusion 1040 can be matched and limited in different orientations, so that the inner shell 103 and the outer shell 104 can be limited in multiple directions in the space, the fixing effect between each other is better, and the stability of the relative position between the inner shell 103 and the outer shell 104 is facilitated. In this embodiment, a groove 1030 is formed at a junction between the outer cylindrical surface 1031 and the outer conical surface 1033 of the inner housing 103, and a protrusion 1040 is formed at a junction between the inner cylindrical surface 1041 and the inner conical surface 1043 of the outer housing 104.
The specific shapes of the groove 1030 and the protrusion 1040 are not limited, and can be selected according to actual requirements. For example, a circular groove, a W-shaped groove, a T-shaped groove, or the like may be provided. In this embodiment, the recess 1030 is a U-shaped recess, the protrusion 1040 is a U-shaped protrusion, and an opening 1034 of the U-shaped recess faces the front end of the lens assembly 20. The U-shaped groove and the U-shaped protrusion are matched, a reverse buckle structure is formed at the bottom of the U-shaped structure, and the inner shell 103 and the outer shell 104 can be prevented from falling off through the reverse buckle structure when the lens assembly 20 is placed upwards or downwards. In addition, the U-shaped groove and the U-shaped protrusion are simple in forming mode and convenient to process and manufacture.
In addition, the connecting structure further includes a plurality of strip-shaped grooves 1035 disposed on the outer surface of the inner shell 103 and a plurality of strip-shaped protrusions 1044 disposed on the inner surface of the outer shell 104, and the strip-shaped protrusions 1044 are correspondingly disposed in the strip-shaped grooves 1035 to realize the engagement between the inner shell 103 and the outer shell 104.
It is noted that the recess and the projection are only one embodiment of the connecting structure. In other embodiments, the connection structure may be implemented by using a thermal conductive adhesive, for example, and the inner shell 103 and the outer shell 104 are fixed by bonding with the thermal conductive adhesive.
Referring to fig. 6 and 7, fig. 6 is an orthographic view of the inner housing 103 in a direction from the front end to the rear end of the lens assembly along the central axis. Fig. 7 is an orthographic view of the housing 104 in a direction from the rear end to the front end of the lens assembly along the central axis.
In one embodiment, to simplify the structure of the inner and outer shells 103, 104, three sets of connecting structures may be provided and evenly distributed around the central axis a, with 120 ° spacing between each other. That is, three U-shaped grooves are uniformly distributed around the central axis a on the inner case 103, and three U-shaped protrusions are uniformly distributed around the central axis a on the outer case 104.
Referring to fig. 8 and 9, fig. 8 is a schematic view of the outer surface of the inner case 103. Fig. 9 is a cross-sectional view of the housing 104.
In one embodiment, the U-shaped groove has a length L and a width b, and for example, a U-shaped groove with a depth of 1.2mm, and L is 8mm, b is 5mm, may be provided. The shape and size of the U-shaped protrusion are matched with those of the U-shaped groove, the protruding amount of the U-shaped protrusion is S, and S is 1.2 mm. The average wall thickness of the housing 104 is t, and in order to facilitate smooth material flow during injection molding of the housing 104, the thickness of the internal ribs on the housing 104 is 60% or less of the average wall thickness t. In one embodiment, for example, t is 2.2mm, and the thickness of the inner rib needs to be maintained to be 0.8mm or more in consideration of the strength of the inner rib itself, the thickness of the inner rib may be set between 0.8mm and 1.32 mm. For example, the thickness of the inner rib may be set to 1mm, and the thickness m of the U-shaped protrusion may be set to 1mm to meet the design requirement.
In a particular embodiment, the diameter of the inner shell 103
When three U-shaped grooves are uniformly distributed on the outer cylindrical surface 1031 of 76mm in the axial direction, the distance between two adjacent U-shaped protrusions along the circumferential direction of the housing 104 should be set within the range of 70mm to 80 mm. In this case, the U-shaped projection on the housing 104 has a circumferential distance of 76 × pi ÷ 3 ÷ 79.6mm to meet the requirements.
Referring to fig. 2 and 10, fig. 10 is a schematic view of the heat-dissipating metal plate 40 and the thermal pad 60 being joined together.
The heat dissipation sheet metal 40 comprises a base plate 401 and an end plate 402 located at the end of the base plate 401, wherein the end plate 402 is bent relative to the base plate 401. Wherein the base plate 401 is joined with the electronic device 30, the end plate 402 is joined with the inner case 103, and the end plate 402 conforms to the shape of the inner case 103, thereby ensuring efficient heat transfer between the end plate 402 and the inner case 103. In one embodiment, both ends of the base plate 401 are provided with end plates 402, and each end plate 402 is engaged with the inner casing 103, thereby achieving a plurality of heat transfer paths from the base plate 401 to each end plate 402 in different directions to accelerate the heat dissipation rate.
In order to facilitate the bending of the end plate 402, the end plate 402 comprises a plurality of branch metal plates 4020 which are spaced apart from each other and arranged side by side, the branch metal plates 4020 can reduce the rigidity of the end plate 402 and increase the elasticity of the end plate 402, and when the end plate is jointed with the inner shell 103, the branch metal plates 4020 can be better attached to the inner surface of the inner shell 103 through self adaptive deformation.
The camera 100 further includes a thermal pad 60, the thermal pad 60 being sandwiched between an end plate 402 and the inner housing 103, the end plate 402 being coupled to the inner housing 103 via the thermal pad 60. The heat conduction pad 60 can compensate for a gap between the end plate 402 and the inner case 103 due to a machining error, and thus, effective heat transfer can be achieved. The thermal pad 60 may be made of a flexible thermally conductive material.
Referring to fig. 11, fig. 11 is a schematic view of a heat dissipating surface 1037 on a single side of the inner housing 103.
In one embodiment, the inner housing 103 includes a heat dissipation surface 1037 on a single side, the heat dissipation surface 1037 is a sum of an area of the heat transfer surface 10370 where the inner housing 103 contacts the thermal pad 60 and an area of the heat spreading surface 10371 located at the periphery of the heat transfer surface 10370, and an area a of the heat dissipation surface 1037pAccording to RaDetermining;
Ra＝Rc+Rsp+Rh(formula 1)
Rc＝D/(k*Ap) (formula 2)
Rh＝1/(hAp) (formula 4)
Wherein R isaIs the total thermal resistance; rcIs normal phase heat conduction thermal resistance; rspIs diffusion thermal resistance; rhIs convective resistance;
Asthe area of the single-side joint of the heat dissipation metal plate and the inner shell is the area of the single-side joint of the heat dissipation metal plate and the inner shell; k is the thermal conductivity of the inner shell; d is the thickness of the inner shell; h is the convective heat transfer coefficient. Wherein A issK, D, h are selected according to empirical values, then R is presentc、Rsp、RhAre all ApA function of (a) is selected within a certain rangepCalculated as shown in FIG. 11 with respect to RaAnd ApFrom the fitted curve of (A), thereby estimatingpThe figure of merit of (1).
In this embodiment, the heat transfer surface 10370 is located in the central region of the heat dissipation surface 1037, and the heat of the electronic device 30 is first transferred to the heat transfer surface 10370 in a concentrated manner, and then diffused from the heat transfer surface 10370 to the heat diffusion surface 10371 to increase the heat dissipation area, so that the whole heat dissipation surface 1037 can dissipate heat synchronously, and further, the heat dissipation surface 1037 can dissipate heat furtherThe steps are transferred to the housing 104. Thereby, the area a of the heat radiation surface 1037 is determinedpThe optimum value of (b) can ensure that the heat transferred to the inner case 103 from the heat-dissipating sheet metal 40 through the heat-conductive pad 60 can be efficiently dissipated.
In one specific embodiment, A is selectedS＝300mm2、k＝3w/(m·k)、D＝1.8mm、h＝10w/(m2K), as can be seen from fig. 12, when Ap is 900mm2The overall thermal resistance Ra rate decreases slowly, and A can be calculated by taking the overall dimensions of the housing assembly 10 into accountpThe preferred value Ap of (x) is 900mm2。
In one embodiment, the height dimension W of the inner housing 103 along the central axis a is determined according to the following formula:
wherein h is the convective heat transfer coefficient; g is the acceleration of gravity; alpha is alphaVIs the coefficient of bulk expansion; v is the dynamic viscosity coefficient; delta t is the excess temperature; α is thermal diffusivity. Wherein g, alphaVV, delta t and alpha are selected according to empirical values. As can be seen from equation 5, in order to maximize the heat dissipation performance and increase the convective heat transfer coefficient h, the height dimension W of the inner casing 103 needs to be reduced, that is, the height dimension W is inversely related to the convective heat transfer coefficient of the outer casing 10 of the camera. The height dimension W may also be referred to as a depth height W with the placement of the camera 100 in fig. 1 as a reference direction. The figure of merit for height dimension W is derived subject to spatial layout and appearance constraints. In ApHas a preferred value of 900mm2In an embodiment, the height dimension W may be set to 25 mm.
In this embodiment, the heat dissipation metal plate 40 is connected to two portions of the inner shell 103 through the end plates 402 disposed at two ends, and based on this, two heat conduction pads 60 are disposed and are disposed in one-to-one correspondence with the two end plates 402. That is, the two end plates 402 are respectively joined to the inner casing 103 via the thermal pad 60 to form two heat dissipating surfaces 1037, and the area a of each heat dissipating surface 1037pThe optimum value of (c) can be determined in the same manner as above. It is composed ofMiddle, two heat dissipating surfaces 1037 having an area apMay be the same or different.
Referring to fig. 13 and 14, fig. 13 is another sectional view of the inner case 103 and the outer case 104 joined together. Fig. 14 is a plan view of the inner case 103 engaged with the outer case 104.
In one embodiment, the housing 104 includes a fixing post 1045, and the fixing post 1045 is used for fixing components housed in the housing assembly 10, such as the lens assembly 20, the main board assembly 50, and the fill light. The inner shell 103 includes a reinforcing peripheral wall 1036, and the reinforcing peripheral wall 1036 covers or partially covers the outer side of the fixing post 1045. That is to say, the fixing column 1045 is wrapped by the reinforcing peripheral wall 1036, which not only increases the friction force between the inner shell 103 and the outer shell 104, but also ensures that the inner shell 103 and the outer shell 104 are attached more tightly; meanwhile, the strength of the fixing column 1045 is enhanced, and the fixing reliability is enhanced. The fixing post 1045 may be provided with a smooth hole or a threaded hole to facilitate screwing in of a screw or a bolt. The securing posts 1045 may be integrally formed with the outer shell 104 and the reinforcing peripheral wall 1036 may be integrally formed with the inner shell 103.
Referring to fig. 15, fig. 15 is a sectional view of another part of the video camera 100.
The outer casing 104 includes a first outer casing 104a and a second outer casing 104b, wherein the first outer casing 104a is provided with a window 102 facing the lens assembly 20, the inner casing 103 is attached to an inner surface of the first outer casing 104a, the first outer casing 104a covers the inner casing 103 to form a first receiving cavity 1001 with an opening, the second outer casing 104b is in sealing engagement with the first outer casing 104a at the opening side to form a sealed receiving cavity 101, and the second outer casing 104b may be a single-layer structure. The first outer shell 104a is closer to the lens assembly 20 and the electronic device 30 than the second outer shell 104b, and therefore, the inner shell 103 is only attached to the inner surface of the first outer shell 104a, which can reduce the volume of the inner shell 103 and save materials, on the one hand, can also reduce the volume of the heat dissipation sheet metal 40, shorten the heat conduction path between the heat dissipation sheet metal 40 and the inner shell 103, and improve the heat dissipation effect. In this embodiment, the first outer shell 104a and the inner shell 103 are integrally formed by a two-shot molding process.
The camera 100 further includes a seal ring 70, the seal ring 70 being sandwiched between the first housing 104a and the second housing 104b to effect the sealing engagement of the first housing 104a and the second housing 104 b. In one embodiment, as shown in fig. 5, the first outer shell 104a includes an engagement surface 1046 engaged with the second outer shell 104b, and a height difference δ is provided between an end of the inner shell 103 close to the second outer shell 104b and the engagement surface 1046 to form a gap for accommodating the sealing ring 70. The joint surface 1046 is an end surface of the first outer shell 104a at the open end, and the end surface of the first outer shell 104a at the open end is higher than the end surface of the inner shell 103. In one embodiment, the difference in height between the end surface of the first outer shell 104a and the end surface of the inner shell 103 is greater than 3 mm. In an alternative embodiment, the height difference δ is 3.1 mm.
The engagement surface 1046 is further provided with a gasket mounting groove 1047 (refer to fig. 5), and the gasket 70 is disposed in the gasket mounting groove 1047 and surrounds the periphery of the first receiving cavity 1001, so that the first housing 104a is in sealing engagement with the second housing 104 b.
The connection structure includes a first connection structure disposed on an inner surface of the first outer case 104a, and a second connection structure disposed on an outer surface of the inner case 103, the first connection structure receiving the second connection structure, so that the outer surface of the inner case 103 and the inner surface of the first outer case 104 form a thermal conduction channel. In one embodiment, one of the first and second connecting structures is provided with a recess and the other is provided with a projection adapted to the recess, the recess receiving the projection. The concave portion is a groove 1030, and the convex portion is a protrusion 1040.
In this embodiment, the first connecting structure is the projection, i.e., projection 1040, and the second connecting structure is the recess, i.e., recess 1030, which receives the projection. The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (18)
1. A camera is characterized by comprising an outer shell component, an electronic device and a heat dissipation metal plate, wherein the outer shell component comprises a containing cavity, an outer shell made of plastic materials and an inner shell made of heat conduction plastic materials, the outer shell is positioned on the outer side of the inner shell, and the inner shell and the outer shell are kept relatively fixed through a connecting structure; the heat dissipation panel beating with electron device accept in accept the chamber, the heat dissipation panel beating with electron device and the inner shell thermal conduction for with the heat transfer that electron device produced gives the inner shell.
2. The camera of claim 1, wherein the connecting structure comprises a recess and a projection that are shaped to fit, one of the inner and outer housings being provided with the recess and the other being provided with the projection, the projection being provided within the recess.
3. The camera of claim 2, wherein the housing assembly has a central axis, and the connecting structures are provided in a plurality of sets, the plurality of sets being disposed at intervals around the central axis between the inner housing and the outer housing.
4. The camera according to claim 3, wherein an inner step surface having a different radial dimension is formed on an inner surface of the outer shell in the direction of the central axis, an outer step surface having a different radial dimension is formed on an outer surface of the inner shell, one of the recess and the projection is provided on the inner step surface, and the other is provided on the outer step surface.
5. The camera of claim 2, wherein the camera comprises a lens assembly, the recess is configured as a U-shaped groove, the protrusion is configured as a U-shaped protrusion, and an opening of the U-shaped groove faces a front end of the lens assembly.
6. The camera according to claim 1, further comprising a thermal pad sandwiched between the heat-dissipating metal plate and the inner shell, wherein a plurality of branch metal plates are formed at an end of the heat-dissipating metal plate in contact with the thermal pad, the branch metal plates being spaced apart from each other side by side, and a shape of the branch metal plates matches a shape of the inner shell.
7. The camera of claim 1, wherein the outer housing comprises a fixing post for fixing the inner component, the inner housing comprises a reinforcing surrounding wall, and the reinforcing surrounding wall covers or partially covers the outer side of the fixing post; and/or
The shell with the shell passes through double-shot moulding integrated into one piece.
8. The camera of claim 1, wherein the housing assembly comprises first and second housings separately disposed, the first housing having a window for facing the lens assembly, and the electronics being disposed within the first housing, the inner housing being attached to an inner surface of the first housing.
9. The camera of claim 8, wherein the outer surface of the inner housing conforms to the inner surface of the first outer housing and conforms to each other.
10. The camera of claim 8, wherein the first outer housing includes an engagement surface for sealing engagement with the second outer housing, wherein an end of the inner housing proximate the second outer housing is provided with a height differential from the engagement surface to form a gap for receiving a sealing ring for sealing the first outer housing with the second outer housing.
11. A housing assembly for a camera, comprising:
an inner shell having a thermally conductive plastic material;
a first housing having a plastic material;
wherein, the first outer shell cladding the inner shell constitutes to have open first and accepts the chamber, the inner shell is injectd: at the end face of the open end, the end face of the first outer shell is higher than the end face of the inner shell;
the inner surface of the first outer shell is provided with a first connecting structure, the outer surface of the inner shell is provided with a second connecting structure, and the first connecting structure receives the second connecting structure, so that the outer surface of the inner shell and the inner surface of the first outer shell form a heat conduction channel.
12. A camera housing assembly according to claim 11, wherein one of the first and second connecting structures is provided with a recess and the other is provided with a projection adapted to fit into the recess, the recess receiving the projection.
13. The camera housing assembly of claim 12, wherein the first connecting structure is the projection and the second connecting structure is the recess, the recess receiving the projection.
14. The camera housing assembly of claim 13, wherein the inner housing is overmolded with the first outer housing.
15. The housing assembly of any of claims 11 to 13, wherein a height difference between the end face of the first outer housing and the end face of the inner housing is greater than 3 mm.
16. The housing assembly of claim 11, wherein the depth height W of the inner housing is defined to satisfy: the depth height is inversely related to a convective heat transfer coefficient of a housing assembly of the camera.
17. The housing assembly of claim 16, wherein the depth height W of the inner housing is defined to satisfy:
wherein h is the convective heat transfer coefficient; g is the acceleration of gravity; alpha is alphaVIs the coefficient of bulk expansion; v is the dynamic viscosity coefficient; delta t is the excess temperature; α is thermal diffusivity.
18. The camera housing assembly of claim 17, further comprising a second housing, wherein the first housing has a seal ring mounting groove disposed in an end face thereof for receiving a seal ring to sealingly engage the first housing with the second housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811319.0U CN216391178U (en) | 2021-11-16 | 2021-11-16 | Camera and camera housing assembly |
| PCT/CN2022/105899 WO2023087755A1 (en) | 2021-11-16 | 2022-07-15 | Camera, and shell assembly of camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811319.0U CN216391178U (en) | 2021-11-16 | 2021-11-16 | Camera and camera housing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216391178U true CN216391178U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122811319.0U Active CN216391178U (en) | 2021-11-16 | 2021-11-16 | Camera and camera housing assembly |
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| Country | Link |
|---|---|
| CN (1) | CN216391178U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087755A1 (en) * | 2021-11-16 | 2023-05-25 | 杭州海康威视数字技术股份有限公司 | Camera, and shell assembly of camera |
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2021
- 2021-11-16 CN CN202122811319.0U patent/CN216391178U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087755A1 (en) * | 2021-11-16 | 2023-05-25 | 杭州海康威视数字技术股份有限公司 | Camera, and shell assembly of camera |
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