Camera sealing structure and camera

Abstract

The camera sealing structure comprises a shell assembly, a sensor assembly, a flange assembly and a PCB assembly, the shell assembly comprises a lower shell, the sensor assembly comprises a sensor board and a connecting circuit board, the flange assembly comprises a flange and a circuit connecting piece, and the PCB assembly comprises a PCB; the lower shell and the flange are connected and jointly form a containing cavity. The flange is provided with a through groove, the through groove is communicated with the containing cavity, and the circuit connecting piece is tightly arranged in the through groove. The sensor assembly is arranged in the containing cavity, and the sensor plate is connected with the side, close to the containing cavity, of the circuit connecting piece through the connecting circuit board; the PCB assembly is arranged outside the containing cavity, and the PCB is connected with the side, away from the containing cavity, of the circuit connecting piece. According to the utility model, the camera size can be reduced, and the sealing performance, refrigeration performance and hardware stability of the camera are improved.

Description

Technical Field

[0001] The utility model relates to the field of imaging technology, in particular to a camera sealing structure and a camera. Background Art

[0002] With the development of science and technology, people have higher and higher requirements for the volume and refrigeration depth of refrigerated cameras. Among the factors that cameras rely on most during the refrigeration process is the tightness of the refrigeration cavity. A well-sealed cavity can provide a dry gas environment for the low-temperature components inside the cavity and ensure the normal operation of the device. Currently, the commonly used signal lead-out sealing technology mainly uses an O-ring combined with a connection circuit board connecting to a sensor board for sealing. However, with the improvement of people's requirements for various aspects of cameras, the disadvantages of this sealing method have begun to emerge.

[0003] The traditional sealing method of an O-ring combined with a connection circuit board is as Figure 1 shown. The flange is connected to the lower shell to form a cavity. The flange and the lower shell are sealed through a connection circuit board and two O-rings located on the upper and lower sides of the connection circuit board respectively. The connection circuit board is generally in the shape of a "mouth" and has a large size. The sensor board located inside the cavity is connected to the edge of the connection circuit board extending into the cavity. A signal docking part is provided on the edge of the connection circuit board extending outside the cavity to connect to the external PCB, that is, the connection between the sensor board inside the cavity and the external PCB board is realized through the connection circuit board. However, the existing structure and sealing method not only result in a poor sealing effect and a low tightness of the cavity, but also increase the complexity of hardware connection. In addition, such a structure will also cause heat leakage inside the cavity. The heat of the high-temperature components will migrate to the low-temperature components inside the cavity through the connection circuit board, thereby adversely affecting the refrigeration effect of the sensor. As Figure 2 shown, in the refrigeration case, the high-temperature flange directly contacts the connection circuit board on its top. Since the thermal conductivity of the PCB in the planar direction is relatively high (the heat conduction ability of the PCB in the planar direction is stronger than that in the thickness direction), the horizontally placed connection circuit board will cause more heat to be transferred from the high-temperature flange to the sensor board inside the cavity, making the heat return to the sensor itself and resulting in a poor refrigeration effect. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a camera sealing structure and a camera, which can reduce the size of the camera, and at the same time improve the sealing performance and refrigeration performance of the camera.

[0005] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A camera sealing structure, comprising a housing assembly, a sensor assembly, a flange assembly and a PCB assembly. The housing assembly includes a lower housing. The sensor assembly includes a sensor board and a connection circuit board. The flange assembly includes a flange and a circuit connector. The PCB assembly includes a PCB board;

[0006] The lower housing is connected to the flange and together they form a cavity. The flange is provided with a through groove, and the through groove communicates with the cavity. The circuit connector is disposed in the through groove. The sensor assembly is disposed in the cavity. The sensor board is connected to one side of the circuit connector close to the cavity through the connection circuit board. The PCB assembly is disposed outside the cavity, and the PCB board is connected to the other side of the circuit connector away from the cavity.

[0007] Further, the sensor assembly further includes a first mating connector. The connection circuit board is connected to one side of the circuit connector through the first mating connector;

[0008] The PCB assembly further includes a second mating connector. The PCB board is connected to the other side of the circuit connector through the second mating connector.

[0009] Further, the connection circuit board is strip-shaped and provided with jacks. The first mating connector is provided with pins, and the pins are inserted into the jacks.

[0010] Further, the circuit connector is disposed in the through groove in an interference fit manner.

[0011] Further, the longitudinal section of the through groove is stepped. The through groove includes a glue placement groove and a communication groove connected in sequence. The longitudinal section width of the glue placement groove is greater than that of the communication groove. The circuit connector is disposed in the communication groove in an interference fit manner. The glue placement groove is used for filling an adhesive, and the adhesive is used for sealing the cavity.

[0012] Further, the flange assembly further includes a first sealing ring, and the first sealing ring is disposed between the flange and the lower housing.

[0013] Further, the flange assembly further includes a heat conducting block, a refrigeration sheet, a first heat conducting layer, a second heat conducting layer and a third heat conducting layer. The heat conducting block and the refrigeration sheet are located in the cavity. The refrigeration sheet is disposed on the flange through the first heat conducting layer. The heat conducting block is disposed on the refrigeration sheet through the second heat conducting layer. The sensor is disposed on the heat conducting block through the third heat conducting layer.

[0014] Further, the housing assembly further includes a window pane, a second sealing ring, and a window pane retaining ring. The lower housing is provided with a light-passing hole communicating with the cavity. The window pane is disposed at the light-passing hole and fixedly connected to the lower housing through the window pane retaining ring. The second sealing ring is disposed between the window pane and the lower housing.

[0015] Further, a locking member is further included, and the lower housing assembly, the sensor assembly, and the flange assembly are locked by the locking member.

[0016] The present utility model further provides a camera, including the camera sealing structure as described above.

[0017] The beneficial effects of the present utility model are as follows: The lower housing is disposed on the flange and forms a cavity with the flange. A through groove is formed on the flange. The connection circuit board in the cavity and the PCB board outside the cavity are connected through a circuit connection member disposed in the through groove, realizing the transmission of signals from inside the cavity to outside the cavity. Compared with the prior art solution, in this solution, the connection circuit board does not need to extend horizontally outside the cavity to ensure the connection of the PCB board outside the cavity, which can effectively reduce the size of the connection circuit board, thereby bringing great improvement to the optimization of the size space of the camera. Moreover, since the connection circuit board is disposed in the cavity in this solution, the increase of the sealing surface caused by being disposed between the lower housing and the flange can be avoided, thereby improving the sealing performance of the camera. At the same time, the arrangement in the cavity can also avoid the direct contact between the connection circuit board and the flange, thereby preventing the heat of the flange at high temperature from being transferred to the sensor board in the cavity, so as to solve the problem of poor refrigeration effect brought by the existing sealing method. The present utility model can reduce the size of the camera, and at the same time improve the sealing performance and refrigeration performance of the camera. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an existing sealing method combining an O-ring and a PCB;

[0019] Figure 2 is a schematic diagram of heat leakage transmission of an existing sealing method combining an O-ring and a PCB;

[0020] Figure 3 is an exploded structural diagram of the camera sealing structure according to the first embodiment of the present utility model;

[0021] Figure 4 is a schematic cross-sectional structure diagram of the housing assembly according to the first embodiment of the present utility model;

[0022] Figure 5 is an exploded structural diagram of the sensor assembly according to the first embodiment of the present utility model;

[0023] Figure 6 is an exploded structural diagram of the flange assembly according to the first embodiment of the present utility model;

[0024] Figure 7 Exploded structural schematic diagram of the PCB assembly according to the first embodiment of the present utility model;

[0025] Figure 8 Cross-sectional structural schematic diagram of the camera sealing structure according to the first embodiment of the present utility model.

[0026] Label description:

[0027] 1. Housing assembly; 2. Sensor assembly; 3. Flange assembly; 4. PCB assembly;

[0028] 11. Lower shell; 12. Window piece; 13. Second sealing ring; 14. Window piece retaining ring;

[0029] 21. Sensor; 22. Sensor board; 23. Connection circuit board; 24. First mating connector;

[0030] 31. Flange; 32. Circuit connector; 33. First sealing ring; 34. Adhesive; 35. Refrigeration sheet; 36. Heat conduction block;

[0031] 311. Through groove; 312. Sealing groove; 3111. Glue placement groove; 31112. Communication groove;

[0032] 41. PCB board; 42. Second mating connector. Detailed implementation manners

[0033] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following is described in detail in conjunction with the implementation manners and with reference to the accompanying drawings.

[0034] Please refer to Figure 3 , a camera sealing structure, including a housing assembly, a sensor assembly, a flange assembly and a PCB assembly, the housing assembly includes a lower shell, the sensor assembly includes a sensor board and a connection circuit board, the flange assembly includes a flange and a circuit connector, and the PCB assembly includes a PCB board;

[0035] The lower shell is connected to the flange and together forms a cavity; the flange is provided with a through groove, the through groove communicates with the cavity, and the circuit connector is arranged in the through groove; the sensor assembly is arranged in the cavity, and the sensor board is connected to one side of the circuit connector close to the cavity through the connection circuit board; the PCB assembly is arranged outside the cavity, and the PCB board is connected to the side of the circuit connector away from the cavity.

[0036] As can be seen from the above description, the beneficial effects of the present utility model are as follows: the size of the camera can be reduced, at the same time, the hardware stability and refrigeration performance of the camera can be improved, and the sealing performance of the camera can also be improved.

[0037] Further, the sensor assembly further includes a first mating connector, and the connection circuit board is connected to one side of the circuit connector through the first mating connector;

[0038] The PCB assembly further includes a second mating connector, and the PCB board is connected to the other side of the circuit connector through the second mating connector.

[0039] As can be seen from the above description, stable connections between the circuit connection board and the circuit connector, and between the circuit connector and the PCB board are achieved through the mating connectors, improving the hardware stability of the camera.

[0040] Further, the connection circuit board is strip-shaped and provided with jacks, and the first mating connector is provided with pins, and the pins are inserted into the jacks.

[0041] As can be seen from the above description, a stable connection between the connection circuit board and the first mating connector can be achieved; at the same time, the heat transferred from the high-temperature flange can be effectively reduced, improving the refrigeration performance of the camera.

[0042] Further, the circuit connector is arranged in the through groove in an interference fit manner.

[0043] As can be seen from the above description, through the interference fit, the assembly between the circuit connector and the flange is facilitated.

[0044] Further, the longitudinal section of the through groove is stepped; the through groove includes an adhesive placing groove and a communicating groove connected in sequence, the longitudinal section width of the adhesive placing groove is greater than that of the communicating groove; the circuit connector is arranged in the communicating groove in an interference fit manner, the adhesive placing groove is used for filling an adhesive, and the adhesive is used for sealing the cavity.

[0045] As can be seen from the above description, by providing a stepped through groove, a platform for placing the adhesive is available when the adhesive is in a liquid state, which helps to achieve a tight connection between the circuit connector and the through groove after the adhesive cures; through the adhesive, the seal between the circuit connector and the through groove is achieved, and compared with the existing sealing methods, the overall standard leakage rate of the cavity can be reduced.

[0046] Further, the height of the adhesive placing groove is greater than or equal to 2 mm.

[0047] As can be seen from the above description, the sealing effect can be further ensured.

[0048] Further, the flange assembly further includes a first sealing ring, and the first sealing ring is arranged between the flange and the lower shell.

[0049] Further, a sealing groove is provided at the top of the flange, and the first sealing ring is embedded in the sealing groove.

[0050] As described above, by providing the first sealing ring, the sealing performance of the cavity can be further ensured.

[0051] Furthermore, the flange assembly further includes a heat conducting block and a refrigerating sheet, which are located in the cavity; the heat conducting block and the refrigerating sheet are stacked on the flange.

[0052] Furthermore, the flange assembly further includes a first heat conducting layer and a second heat conducting layer. The refrigerating sheet is disposed on the flange through the first heat conducting layer, and the heat conducting block is disposed on the refrigerating sheet through the second heat conducting layer;

[0053] It further includes a third heat conducting layer, and the sensor is disposed on the heat conducting block through the third heat conducting layer.

[0054] As described above, by providing the heat conducting layer, the refrigerating effect is improved.

[0055] Furthermore, the housing assembly further includes a window pane, a second sealing ring and a window pane retaining ring. The lower housing is provided with a light passing hole communicating with the cavity. The window pane is disposed at the light passing hole and is fixedly connected to the lower housing through the window pane retaining ring. The second sealing ring is disposed between the window pane and the lower housing.

[0056] As described above, by providing the second sealing ring, the sealing performance between the light passing hole and the window pane is ensured, thereby further ensuring the sealing performance of the cavity.

[0057] Furthermore, it further includes a locking member, and the lower housing assembly, the sensor assembly and the flange assembly are locked by the locking member.

[0058] As described above, the connection stability among the three is ensured.

[0059] The present utility model further provides a camera, including the camera sealing structure as described above.

[0060] Embodiment 1

[0061] Please refer to Figure 3-8 , Embodiment 1 of the present utility model is: a camera sealing structure, as Figure 3 shown, including a housing assembly 1, a sensor assembly 2, a flange assembly 3 and a PCB assembly 4.

[0062] As Figure 4 shown, the housing assembly 1 includes a lower housing 11. Combining Figure 8 shown, the lower housing 11 is disposed on the top of the flange 21 in the flange assembly 2, and a cavity is formed between the lower housing 11 and the flange 21.

[0063] As Figure 6As shown, the flange assembly 3 includes a flange 31, a circuit connector 32, and a first sealing ring 33. Combining Figure 8 As shown, a through groove 311 penetrating the bottom is provided at the bottom of the flange 31, and the circuit connector 32 is arranged in the through groove 311 with an interference fit. Specifically, the longitudinal section of the through groove 311 (i.e., Figure 8 the section in the vertical direction in

[0064] this figure, that is, the section perpendicular to the bottom direction of the flange) is stepped, including a glue placement groove 3111 and a communication groove 3112 connected in sequence. The longitudinal section width of the glue placement groove 3111 is greater than that of the communication groove 3112. The circuit connector 32 is arranged in the communication groove 3112 with an interference fit, and an adhesive (not shown in the figure) is filled between the circuit connector 32 and the glue placement groove 3111. A sealing groove 312 is provided at the top of the flange 31, and the first sealing ring 33 is embedded in the sealing groove 312.

[0065] In this embodiment, the circuit connector 32 can be a socket, which includes a base made of plastic material. One side of the base is provided with pins (male pins), and the other side is provided with jacks (female holes); the adhesive 34 can be an epoxy resin colloid. The size of the through groove 311 is adapted to the size of the circuit connector 32, so that the circuit connector 32 and the through groove 311 are in interference fit and tightly connected, and then sealed through the adhesive 34. The height of the glue placement groove 3111 is not less than 2 mm, and the adhesive fills the glue placement groove 3111 to ensure the sealing effect.

[0066] The sensor assembly is a hardware integration whole, containing the most important electronic devices in the camera, such as sensors and other electronic components. As Figure 5 shown, the sensor assembly 2 includes a sensor 21, a sensor board 22, a connection circuit board 23, and a first mating connector 24. Combining Figure 8 shown, the sensor assembly 2 is located in the cavity. The sensor 21 is arranged on the sensor board 22. The sensor board 22 is connected to the connection circuit board 23, and the connection circuit board 23 is connected to one side of the circuit connector 32 close to the inside of the cavity through the first mating connector 24.

[0067] In an optional embodiment, the sensor board and the connection circuit board are connected through an FPC (flexible printed circuit board).

[0068] In some alternative embodiments, the connection circuit board 23 is strip-shaped and is provided with jacks, and the first mating connector 24 is provided with pins adapted to the jacks. By inserting the pins into the jacks, the connection between the connection circuit board 23 and the first mating connector 24 is achieved. In some other alternative embodiments, jacks adapted to the pins on the circuit connector 32 may also be directly formed on the connection circuit board 23, thereby achieving a direct connection between the connection circuit board 23 and the circuit connector 32.

[0069] In other embodiments, jacks may also be directly formed on the sensor board, and the jacks are adapted to the pins on the first mating connector or the pins on the circuit connector, thereby achieving a direct connection between the sensor board and the first mating connector or the circuit connector (socket).

[0070] The PCB assembly is a carrier for leading out signals to the user side. As Figure 7 shown, the PCB assembly 4 includes a PCB board 41 and a second mating connector 42. As Figure 8 shown, the PCB assembly 4 is located outside the cavity, and the PCB board 41 is connected to one side of the circuit connector 32 close to the outside of the cavity through the second mating connector 42, thereby enabling the transmission of signals from the sensor board in the cavity to the PCB board outside the cavity.

[0071] As Figure 6 shown, the flange assembly 3 further includes a first heat-conducting layer (not shown in the figure), a refrigeration sheet 35, a second heat-conducting layer (not shown in the figure), a heat-conducting block 36, and a third heat-conducting layer (not shown in the figure) which are stacked. Specifically, as Figure 8 shown, the refrigeration sheet 36 is disposed at the bottom of the flange 31 through the first heat-conducting layer, the heat-conducting block 36 is disposed on the refrigeration sheet 35 through the second heat-conducting layer, and the sensor assembly 3 is disposed on the heat-conducting block 36 through the third heat-conducting layer. In this embodiment, the first heat-conducting layer, the second heat-conducting layer, and the third heat-conducting layer all adopt silicone grease; the material of the heat-conducting block 36 is selected as T2 copper to maximize the refrigeration effect. As Figure 4 shown, the housing assembly 1 further includes a window pane 12, a second sealing ring 13, and a window pane retaining ring 14. The lower housing 11 is provided with a light-transmitting hole communicating with the cavity. The window pane 12 is disposed at the light-transmitting hole and is fixedly connected to the lower housing 11 through the window pane retaining ring 14; the second sealing ring 13 is disposed between the window pane 12 and the lower housing 11.

[0072] Further, a locking member is further included, and the lower housing assembly, the sensor assembly, and the flange assembly are locked by the locking member. In this embodiment, the locking member may include four locking screws. During the actual assembly process, the lower housing assembly may be buckled onto the flange assembly. Before buckling, ensure that the first sealing ring is properly laid, and then use four locking screws to lock the lower housing assembly, the sensor assembly, and the flange assembly together, thereby completing the assembly of a sealed cavity.

[0073] In this embodiment, the lower shell is directly arranged on the flange and forms a cavity with the flange. By opening a through groove on the flange and connecting the sensor board inside the cavity and the PCB board outside the cavity through a circuit connector placed in the through groove, the signal transmission between the inside and outside of the sealed cavity is realized. Compared with the existing sealing methods, the sealing position between the lower shell and the flange and the signal connection position with the external PCB can be reduced, which can greatly improve the optimization of the size space of the camera. Moreover, for the cavity sealed with epoxy resin colloid, its overall standard leakage rate is lower than that of the traditional cavity sealed by connecting the circuit board and the O-ring. At the same time, the problems of the decline in hardware stability and poor refrigeration effect caused by the existing sealing methods can be avoided.

[0074] In summary, for a camera sealing structure and a camera provided by the present utility model, by directly arranging the lower shell on the flange and forming a cavity with the flange, and by opening a through groove on the flange and connecting the sensor board inside the cavity and the PCB board outside the cavity through a circuit connector placed in the through groove, the signal transmission from inside the cavity to outside the cavity is realized. Compared with the existing sealing methods, in this solution, the connecting circuit board does not need to extend horizontally outside the cavity to ensure the connection of the external PCB board, which can effectively reduce the size of the connecting circuit board, thus bringing great improvement to the optimization of the size space of the camera. Moreover, since the connecting circuit board in this solution is arranged inside the cavity, the increase of the sealing surface caused by its arrangement between the lower shell and the flange can be avoided, thereby improving the sealing performance of the camera. At the same time, the arrangement in the cavity can also avoid the direct contact between the connecting circuit board and the flange, thus preventing the heat of the flange at high temperature from being transferred to the sensor board inside the cavity to solve the problem of poor refrigeration effect caused by the existing sealing methods. By using an adhesive to seal between the circuit connector and the through groove, compared with the existing sealing methods, the overall standard leakage rate of the cavity can be reduced. The present utility model can reduce the size of the camera and improve the sealing performance and refrigeration performance of the camera at the same time.

[0075] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent transformations made by using the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, are equally included in the patent protection scope of the present utility model.

Claims

1. A camera sealing structure, characterized in that, It includes a housing assembly, a sensor assembly, a flange assembly and a PCB assembly. The housing assembly includes a lower housing. The sensor assembly includes a sensor board and a connection circuit board. The flange assembly includes a flange and a circuit connector. The PCB assembly includes a PCB board. The lower housing is connected to the flange and together they form a cavity. The flange is provided with a through groove which communicates with the cavity. The circuit connector is disposed in the through groove. The sensor assembly is disposed in the cavity. The sensor board is connected to one side of the circuit connector close to the cavity through the connection circuit board. The PCB assembly is disposed outside the cavity. The PCB board is connected to the other side of the circuit connector away from the cavity.

2. The camera sealing structure according to claim 1, characterized in that, The sensor assembly further includes a first mating connector. The connection circuit board is connected to one side of the circuit connector through the first mating connector. The PCB assembly further includes a second mating connector. The PCB board is connected to the other side of the circuit connector through the second mating connector.

3. The camera sealing structure according to claim 2, wherein The connection circuit board is strip-shaped and provided with jacks. The first mating connector is provided with pins which are inserted into the jacks.

4. The camera sealing structure according to claim 1, characterized in that, The circuit connector is disposed in the through groove in an interference fit manner.

5. The camera sealing structure according to claim 1, wherein The longitudinal section of the through groove is stepped. The through groove includes a glue placement groove and a communication groove connected in sequence. The longitudinal section width of the glue placement groove is greater than that of the communication groove. The circuit connector is disposed in the communication groove in an interference fit manner. The glue placement groove is used for filling an adhesive which is used to seal the cavity.

6. The camera sealing structure according to claim 1, characterized in that, The flange assembly further includes a first sealing ring which is disposed between the flange and the lower housing.

7. The camera sealing structure according to claim 1, wherein, The flange assembly further includes a heat conducting block, a refrigeration sheet, a first heat conducting layer, a second heat conducting layer and a third heat conducting layer. The heat conducting block and the refrigeration sheet are located in the cavity. The refrigeration sheet is disposed on the flange through the first heat conducting layer. The heat conducting block is disposed on the refrigeration sheet through the second heat conducting layer. The sensor is disposed on the heat conducting block through the third heat conducting layer.

8. The camera sealing structure according to claim 1, wherein, The housing assembly further includes a window piece, a second sealing ring and a window piece retaining ring. The lower housing is provided with a light passing hole communicating with the cavity. The window piece is disposed at the light passing hole and fixedly connected to the lower housing through the window piece retaining ring. The second sealing ring is disposed between the window piece and the lower housing.

9. The camera sealing structure according to any one of claims 1-8, characterized in that, It further includes a locking member. The lower housing assembly, the sensor assembly and the flange assembly are locked through the locking member.

10. A camera, characterized in that, It includes the camera sealing structure according to any one of claims 1-9.

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