Photosensitive sensor

Abstract

A photosensitive sensor disclosed by the present invention comprises a housing with an inner cavity, a glass lens and a circuit board with a photosensitive chip, the housing is provided with a pressure balance hole communicating the outside with the inner cavity, the pressure balance hole is provided with a partition plate in a sealed and sliding manner, and the partition plate shields the pressure balance hole. The glass lens and the circuit board are both located in the inner cavity and move along with the partition plate. The pressure balance valve has the following advantages and effects that the pressure balance valve can be used in a severe working condition environment while balancing the internal and external pressure difference, so that the pressure balance valve has better universality and practical functions.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and particularly to a photosensitive sensor. Background Art

[0002] With the progress of technology, photosensitive sensor products have been widely used in automotive electronics, consumer electronics, medical devices, intelligent wearables, etc. As an important part of the product, the structure plays an important role in the reliability of the product. In the process of using the existing photosensitive sensors, the glass lens may be blown crooked due to the air pressure difference caused by the inconsistent internal and external temperatures, that is, the so-called "exploded shell" phenomenon.

[0003] Chinese Patent No. CN217236827U discloses a photosensitive sensor, which includes a printed circuit board, a glass sheet, a photosensitive chip and a support member. The printed circuit board is formed with a groove, the groove includes a bottom and a first opening facing the bottom, the glass sheet is installed in the first opening, the glass sheet and the groove form a cavity, the bottom is formed with a through hole communicating with the cavity, the support member is disposed on one side of the through hole facing the cavity, and a ventilation groove is provided between the through hole and the support member, and the photosensitive chip is disposed on the support member.

[0004] The above patent sets a ventilation groove to balance the air pressure inside and outside the photosensitive sensor, and shields and sets a waterproof and breathable membrane on the ventilation groove to play the role that gas can pass through while water vapor cannot pass through. Since the application fields of photosensitive sensors are very wide, when the photosensitive sensor is used in an environment with relatively harsh working conditions, pollutants in the environment are extremely likely to adhere to the waterproof and breathable membrane, thereby causing the failure of the waterproof and breathable membrane. As a result, this design structure is greatly limited in actual use and does not have good versatility and practical functions. According to the above problems, the present invention is born. Summary of the Invention

[0005] The purpose of the present invention is to provide a photosensitive sensor, which can balance the internal and external pressure differences and can be used in a harsh working condition environment, so that it has better versatility and practical functions.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: A photosensitive sensor, including a housing with an inner cavity, a glass lens and a circuit board with a photosensitive chip, the housing is provided with a pressure balance hole communicating with the outside and the inner cavity, a partition plate is hermetically and slidably arranged on the pressure balance hole and the partition plate shields the pressure balance hole, and the glass lens and the circuit board are both located in the inner cavity and move with the partition plate.

[0007] By adopting the above technical solution, the partition board cooperates with the sealing sliding structure to achieve the sealing isolation between the inner cavity and the outside world, so that pollutants in the external environment will not enter the inner cavity. When there is a pressure difference between the outside and the inner cavity, the sliding partition board is used to change the volume of the inner cavity to compensate for the formed internal and external pressure differences, so as to achieve the balance of the internal and external pressure differences. And it can be well applied in harsh working conditions, making it have better versatility and practical functions.

[0008] Further set as: A spacer sleeve for isolating the mating clearance between the outside world, the partition board and the pressure balance hole is hermetically connected between the outer wall of the housing and the side of the partition board facing away from the inner cavity, and the spacer sleeve can expand and contract along the sliding direction of the partition board.

[0009] By adopting the above technical solution, the setting of the spacer sleeve realizes the isolation between the mating clearance between the partition board and the pressure balance hole and the outside world, avoiding the penetration of accumulated pollutants into the mating clearance between the partition board and the pressure balance hole, which affects the sealing effect at this position. And by setting the spacer sleeve into a telescopic structure, the setting of the spacer sleeve will not interfere with the movement of the partition board, ensuring the feasibility of the design structure.

[0010] Further set as: There is a detachable sealing assembly structure between one end of the spacer sleeve and the housing, which is hermetically and fixedly connected to the partition board at one end and the housing at the other end.

[0011] By adopting the above technical solution, the convenient disassembly and assembly of the spacer sleeve and the housing are realized through this setting method, which is also convenient for the subsequent maintenance operation of the circuit board on the partition board.

[0012] Further set as: The sealing assembly structure includes an annular groove provided on the housing and surrounding the outer circle of the pressure balance hole, and an extrusion ring extending into the groove and tightly fitted and fixed with it. The spacer sleeve extends between the groove and the extrusion ring.

[0013] By adopting the above technical solution, the spacer sleeve is inserted into the groove, and then the extrusion ring is driven in to tightly press and fix the spacer sleeve in the groove. This method is convenient for disassembly and assembly and has a low processing cost.

[0014] Further set as: The outer peripheral surface of the extrusion ring is an extrusion inclined surface extending along the direction of inserting the extrusion ring into the groove and gradually contracting inward. The side surface of the groove corresponding to the extrusion inclined surface is a mating inclined surface adapted to the extrusion inclined surface, and a pull ring is provided on the extrusion ring.

[0015] By adopting the above technical solution, the cooperation between the extrusion inclined surface and the mating inclined surface can better guide the extrusion ring to extrude the spacer sleeve to improve the tightness of pressing; and by setting the extrusion inclined surface on the outer peripheral surface of the extrusion ring, it is convenient to install the spacer sleeve into the groove.

[0016] Further configured as: A plurality of sealing rings that move with the partition plate are provided between the pressure balance holes and the partition plate. The plurality of sealing rings are arranged at intervals along the movement direction of the partition plate. A guiding component for guiding the movement of the partition plate is provided between the partition plate and the outer shell.

[0017] By adopting the above technical solution, the setting of a plurality of sealing rings realizes multi-channel sealing, so as to ensure the permanent sealing performance of this position. And the provided guiding component is used to guide the movement of the partition plate, avoiding the sealing failure caused by the movement deviation of the partition plate, and ensuring the sealing stability of this structure.

[0018] Further configured as: The guiding component includes a plurality of guide sleeves fixedly arranged in the inner cavity and a plurality of guide posts fixedly arranged on the partition plate and extending into the guide sleeves. The plurality of guide posts are arranged in one-to-one correspondence with the plurality of guide sleeves.

[0019] By adopting the above technical solution, this setting method has a simple structure and low processing cost.

[0020] Further configured as: The outer shell includes a bottom shell, an upper shell, and a fixing structure for fixing the bottom shell and the upper shell. An outer sealing component and an inner sealing component are provided between the bottom shell and the upper shell. The outer sealing component has a normal first sealing level and a second pressurized sealing level for cooperating with the external pressure. The inner sealing component has a normal first sealing level and a second pressurized sealing level for cooperating with the inner cavity pressure.

[0021] By adopting the above technical solution, in the normal state, the first sealing level formed by the provided outer sealing component and inner sealing component realizes the double-channel sealing between the bottom shell and the upper shell, ensuring the sealing performance of the assembly position of the outer shell. When the external pressure changes or the inner cavity pressure changes, the provided outer sealing component and inner sealing component can be switched to the second pressurized sealing level to achieve better sealing between the bottom shell and the upper shell, thereby improving the sealing reliability of this structure.

[0022] Further configured as: The outer sealing component includes an outer sealing ring on the upper shell, an outer closed driving cavity formed between the upper shell and the outer sealing ring, an outer elastic pressing piece arranged on the outer wall of the upper shell, and an outer pressurizing cavity formed between the upper shell and the outer elastic pressing piece. The outer pressurizing cavity communicates with the outer closed driving cavity.

[0023] By adopting the above technical solution, when the external pressure increases, the air pressure presses the outer elastic pressing piece and then compresses the formed outer pressurizing cavity, so that the air pressure in the outer pressurizing cavity is transmitted to the outer closed driving cavity to realize pressurization, thereby enhancing the pressing and sealing force of the outer sealing ring. And this setting structure magnifies the pressure transmission ratio and can achieve a stronger pressurizing effect on the outer closed driving cavity, thereby enhancing the sealing level.

[0024] Further configured as: the inner sealing assembly includes an inner sealing ring disposed on the bottom case, an inner closed driving cavity formed between the bottom case and the inner sealing ring, an inner elastic pressing piece disposed on the inner wall of the bottom case, and an inner pressing cavity formed between the bottom case and the inner elastic pressing piece, and the inner pressing cavity communicates with the inner closed driving cavity.

[0025] By adopting the above technical solution, when the internal cavity pressure increases, the air pressure presses the inner elastic pressing piece and then compresses the formed inner pressing cavity, so that the air pressure in the inner pressing cavity is transmitted to the inner closed driving cavity to achieve pressurization, thereby enhancing the pressing and sealing force of the inner sealing ring. And this set structure amplifies the pressure transmission ratio and can achieve a stronger pressurization effect on the inner closed driving cavity, thereby enhancing the sealing level.

[0026] In summary, the present invention has the following beneficial effects: the present invention can balance the internal and external pressure differences and can be applied in harsh working conditions, making it have better versatility and practical functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of an embodiment; Figure 2 For Figure 1 The enlarged view of part A in Figure 3 For Figure 1 The enlarged view of part B in

[0028] In the figure: 1, internal cavity; 2, outer shell; 21, bottom case; 22, upper case; 23, fixing structure; 3, glass lens; 4, circuit board; 5, pressure balance hole; 6, partition board; 7, spacer sleeve; 8, sealing assembly structure; 81, groove; 82, extrusion ring; 9, extrusion inclined surface; 10, mating inclined surface; 11, pull ring; 12, sealing ring; 131, guide sleeve; 132, guide post; 14, outer sealing assembly; 141, outer sealing ring; 142, outer closed driving cavity; 143, outer elastic pressing piece; 144, outer pressing cavity; 15, inner sealing assembly; 151, inner sealing ring; 152, inner closed driving cavity; 153, inner elastic pressing piece; 154, inner pressing cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Refer to Figures 1 to 3, a photosensitive sensor, comprising a housing 2 with an inner cavity 1, a glass lens 3, and a circuit board 4 with a photosensitive chip. The housing 2 includes a bottom shell 21, an upper shell 22, and a fixing structure 23 for fixing the bottom shell 21 and the upper shell 22. The fixing structure 23 is a plurality of claws integrally provided on the upper shell 22 and a plurality of slots opened on the bottom shell 21 for the claws to be engaged. The upper shell 22 is provided with a pressure balance hole 5 communicating the outside with the inner cavity 1. A partition plate 6 is hermetically and slidably arranged on the pressure balance hole 5, and the partition plate 6 shields the pressure balance hole 5. The glass lens 3 and the circuit board 4 are both located in the inner cavity 1 and fixedly arranged on the partition plate 6. The circuit board 4 with a photosensitive chip is a prior art, and its specific structure and principle will not be elaborated here.

[0031] A spacer sleeve 7 for isolating the cooperation gap between the outside and the partition plate 6 and the pressure balance hole 5 is hermetically connected between the outer wall of the upper shell 22 and the side of the partition plate 6 facing away from the inner cavity 1. The spacer sleeve 7 can expand and contract along the sliding direction of the partition plate 6. The spacer sleeve 7 is made of ceramic fiber cloth, graphite cloth, etc. One end of the spacer sleeve 7 is fixedly sealed and welded to the partition plate 6, and a detachable sealing and assembling structure 8 is provided between the other end and the housing 2.

[0032] The sealing and assembling structure 8 includes an annular groove 81 opened on the upper shell 22 and surrounding the outer circle of the pressure balance hole 5, and an extrusion ring 82 extending into the groove 81 and tightly fitted and fixed with it. The spacer sleeve 7 extends into the groove 81 between the extrusion ring 82. The outer peripheral surface of the extrusion ring 82 is an extrusion inclined surface 9 extending along the direction of the extrusion ring 82 inserted into the groove 81 and gradually contracting inward. One side surface of the groove 81 corresponding to the extrusion inclined surface 9 is a matching inclined surface 10 adapted to the extrusion inclined surface 9. A pull ring 11 is fixedly arranged on the extrusion ring 82. The extrusion ring 82 and the pull ring 11 are both made of metal materials, and the extrusion ring 82 and the groove 81 are extrusion-fixed.

[0033] A plurality of sealing rings 12 moving with the partition plate 6 are provided between the pressure balance hole 5 and the partition plate 6. The plurality of sealing rings 12 are arranged at intervals along the moving direction of the partition plate 6. The sealing rings 12 are fixedly arranged on the partition plate 6 and are made of high-temperature resistant rubber materials. A guiding component for guiding the movement of the partition plate 6 is provided between the partition plate 6 and the housing 2. The guiding component includes a plurality of guide sleeves 131 fixedly arranged in the inner cavity 1 and a plurality of guide posts 132 integrally arranged on the partition plate 6 and extending into the guide sleeves 131. The plurality of guide posts 132 and the plurality of guide sleeves 131 are arranged in one-to-one correspondence, and the guide sleeves 131 are fixedly arranged on the bottom shell 21.

[0034] An outer sealing component 14 and an inner sealing component 15 are provided between the bottom shell 21 and the upper shell 22. The outer sealing component 14 has a normal first sealing level and a second pressurized sealing level for cooperating with the external pressure; the inner sealing component 15 has a normal first sealing level and a second pressurized sealing level for cooperating with the pressure in the inner cavity 1.

[0035] The outer seal assembly 14 includes an outer sealing ring 141 fixedly arranged on the upper shell 22, an outer airtight driving cavity 142 formed between the upper shell 22 and the outer sealing ring 141, an outer elastic pressing piece 143 fixedly arranged on the outer wall of the upper shell 22, and an outer pressing cavity 144 formed between the upper shell 22 and the outer elastic pressing piece 143. The outer pressing cavity 144 communicates with the outer airtight driving cavity 142 through a hole drilled in the upper shell 22. Both the outer elastic pressing piece 143 and the outer sealing ring 141 are made of high-temperature resistant rubber material, and the high-temperature resistant ability of the outer elastic pressing piece 143 can be improved by adhering ceramic fiber cloth outside the outer elastic pressing piece 143.

[0036] The inner seal assembly 15 includes an inner sealing ring 151 fixedly arranged on the bottom shell 21, an inner airtight driving cavity 152 formed between the bottom shell 21 and the inner sealing ring 151, an inner elastic pressing piece 153 fixedly arranged on the inner wall of the bottom shell 21, and an inner pressing cavity 154 formed between the bottom shell 21 and the inner elastic pressing piece 153. The inner pressing cavity 154 communicates with the inner airtight driving cavity 152 through a hole drilled in the bottom shell 21. Both the inner elastic pressing piece 153 and the inner sealing ring 151 are made of high-temperature resistant rubber material, and the high-temperature resistant ability of the inner elastic pressing piece 153 can be improved by adhering ceramic fiber cloth outside the inner elastic pressing piece 153.

[0037] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A photosensitive sensor, comprising a housing (2) having an inner cavity (1), a glass lens (3), and a circuit board (4) with a photosensitive chip, characterized in that: A pressure balance hole (5) communicating with the outside and the inner cavity (1) is provided on the outer shell (2). A partition plate (6) is hermetically and slidably arranged on the pressure balance hole (5), and the partition plate (6) shields the pressure balance hole (5). The glass lens (3) and the circuit board (4) are both located in the inner cavity (1) and move with the partition plate (6).

2. The photosensitive sensor according to claim 1, wherein: A spacer sleeve (7) that isolates the outside from the mating gap between the partition plate (6) and the pressure balance hole (5) is hermetically connected between the outer wall of the outer shell (2) and the side of the partition plate (6) facing away from the inner cavity (1). The spacer sleeve (7) can expand and contract along the sliding direction of the partition plate (6).

3. The photosensitive sensor according to claim 2, characterized in that: A detachable sealing and assembling structure (8) is provided between one end of the spacer sleeve (7) and the outer shell (2).

4. The photosensor according to claim 3, wherein: The sealing and assembling structure (8) includes an annular groove (81) provided on the outer shell (2) and surrounding the outer circumference of the pressure balance hole (5), and an extrusion ring (82) extending into and tightly fitted with the groove (81). The spacer sleeve (7) extends between the extrusion ring (82) and the groove (81).

5. The photosensitive sensor according to claim 4, wherein: The outer peripheral surface of the extrusion ring (82) is an extrusion inclined surface (9) that extends along the direction of insertion of the extrusion ring (82) into the groove (81) and gradually contracts inward. One side surface of the groove (81) corresponding to the extrusion inclined surface (9) is a mating inclined surface (10) adapted to the extrusion inclined surface (9). A pull ring (11) is provided on the extrusion ring (82).

6. The photosensitive sensor according to claim 1, wherein: A plurality of sealing rings (12) that move with the partition plate (6) are provided between the pressure balance hole (5) and the partition plate (6). The plurality of sealing rings (12) are arranged at intervals along the movement direction of the partition plate (6). A guiding component for guiding the movement of the partition plate (6) is provided between the partition plate (6) and the outer shell (2).

7. The photosensitive sensor according to claim 6, wherein: The guiding component includes a plurality of guide sleeves (131) fixedly arranged in the inner cavity (1) and a plurality of guide posts (132) fixedly arranged on the partition plate (6) and extending into the guide sleeves (131). The plurality of guide posts (132) are arranged in one-to-one correspondence with the plurality of guide sleeves (131).

8. The photosensitive sensor according to claim 1, wherein: The outer shell (2) includes a bottom shell (21), an upper shell (22), and a fixing structure (23) for fixing the bottom shell (21) and the upper shell (22). An outer sealing component (14) and an inner sealing component (15) are provided between the bottom shell (21) and the upper shell (22). The outer sealing component (14) has a normal first sealing level and a second pressurized sealing level for matching the external pressure. The inner sealing component (15) has a normal first sealing level and a second pressurized sealing level for matching the pressure in the inner cavity (1).

9. The photosensitive sensor according to claim 1, characterized in that: The outer sealing component (14) includes an outer sealing ring (141) provided on the upper shell (22), an outer closed driving cavity (142) formed between the upper shell (22) and the outer sealing ring (141), an outer elastic pressurizing piece (143) provided on the outer wall of the upper shell (22), and an outer pressurizing cavity (144) formed between the upper shell (22) and the outer elastic pressurizing piece (143). The outer pressurizing cavity (144) communicates with the outer closed driving cavity (142).

10. The photosensitive sensor according to claim 1, characterized in that: The inner sealing assembly (15) includes an inner sealing ring (151) disposed on the bottom case (21), an inner closed driving cavity (152) formed between the bottom case (21) and the inner sealing ring (151), an inner elastic pressing piece (153) disposed on the inner wall of the bottom case (21), and an inner pressing cavity (154) formed between the bottom case (21) and the inner elastic pressing piece (153). The inner pressing cavity (154) communicates with the inner closed driving cavity (152).

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