Optical detection device
By setting a rugged structure on the housing of the optical detection device to extend the electrostatic release path, the problem of the electrostatic release path in the prior art is solved, and more effective electrostatic protection is achieved.
Patent Information
- Application Number
- CN202311809257.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-14
- Filing Date
- 2023-12-26
- Publication Date
- 2025-03-14
AI Technical Summary
The conventional electrostatic release path of existing optical detection devices is short, making it difficult to ensure that static electricity will be released to specific electrodes with electrostatic protection design, and it is difficult to economically extend the internal discharge path without changing the overall appearance.
By providing a rugged structure around the open structure of the housing, the lens element is engaged to extend the electrostatic release path, and by optimizing the design of the opening structure and the rugged structure, the length of the electrostatic release path is ensured to be significantly increased.
It is realized that the length of the electrostatic release path is significantly extended without changing the appearance of the optical detection device, thereby ensuring that the electrostatic energy is effectively released to the closest electrode with an electrostatic protection design, and enhancing the electrostatic protection effect.
Smart Images
Figure CN119629827A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an optical detection device, in particular to an optical detection device with a preferred electrostatic protection effect. Background Art
[0002] See also Fig.10 , Fig.10 1 is a structural cross-sectional view of an optical detection device 100 of the prior art. The optical detection device 100 includes a circuit board 102 having an electrode 104, a lens element 106, and a housing 108. The circuit board 102 and the lens element 106 are disposed in the housing 108. The lens element 106 receives an external optical signal through a hole 110 of the housing 108. The support surface 112 and the retaining wall 114 of the housing 108 are respectively stopped at the bottom and side of the lens element 106. The electrostatic discharge path of the optical detection device 100 is from the hole 110 through the gap between the lens element 106 and the support surface 112 and the retaining wall 114, across the air zone, and reaches the electrode 104. In the past use experience, the conventional electrostatic discharge path of the optical detection device 100 is short, and it is difficult to ensure that the static electricity will be discharged to a specific electrode with an electrostatic protection design; therefore, how to design an optical detection device that can extend the internal discharge path in the most economical way and maintain the simplicity of internal components without changing the overall appearance is one of the development goals of the relevant optical design industry. Summary of the invention
[0003] The invention relates to an optical detection device with a preferred electrostatic protection effect.
[0004] The present invention further discloses an optical detection device with a preferred electrostatic protection effect, comprising a circuit substrate, a lens element and a housing. The circuit substrate has a plurality of electrodes. The lens element is arranged on the circuit substrate. The housing comprises a housing cavity and an opening structure. The housing cavity is used to accommodate the circuit substrate and the lens element. The opening structure is connected to the housing cavity. The housing further comprises a rugged structure. The rugged structure surrounds the opening structure and is used to engage the lens element to extend the opening structure to the electrostatic release path closest to the electrode among the plurality of electrodes.
[0005] The present invention further discloses that a plurality of distances from each section of the outer hole edge of the opening structure to each corresponding section of the rugged structure have the same value, or the difference between the plurality of distances is less than a predetermined threshold. A plurality of intervals from the central axis of the opening structure to each section of the outer hole edge of the opening structure have the same value, or the difference between the plurality of intervals is less than a predetermined threshold.
[0006] The present invention further discloses that the housing further comprises a stopper, which is arranged at a position adjacent to the lens element and relative to a side of the opening structure. The rugged structure cooperates with the stopper to fix the lens element. The housing has a stopper surface, which is connected to the side wall of the opening structure and abuts against the lens element. The rugged structure is protrudingly arranged at a position between the lens element and the opening structure on the stopper surface.
[0007] The present invention further discloses that the lens element comprises a lens body, a first supporting portion and a second supporting portion. The first supporting portion and the second supporting portion extend outward from two opposite sides of the lens body to connect the circuit substrate and the housing. The rugged structure stops at the inner side surface of the second supporting portion adjacent to the lens body. The structural width of the second supporting portion is the same as the structural width of the first supporting portion, or is smaller than the structural width of the first supporting portion.
[0008] The present invention also discloses that the shell also has a stop surface, which is connected to the side wall of the opening structure and abuts against the lens element. The rugged structure is concavely formed at a position of the stop surface facing the lens element. The lens element includes a lens body, a first support portion and a second support portion. The first support portion and the second support portion extend outward from two opposite sides of the lens body respectively to connect the circuit substrate and the shell. The second support portion has a protrusion to insert into the rugged structure. The protrusion is arranged on the outer side surface of the second support portion relative to the lens body, or on the inner side surface of the second support portion adjacent to the lens body, or on the middle section of the second support portion between the inner side surface and the outer side surface.
[0009] The present invention also discloses that the housing also has a stop surface, which is connected to the side wall of the opening structure and abuts against the lens element. The rugged structure is protrudingly arranged at a position of the stop surface aligned with the lens element. The lens element includes a lens body, a first support portion and a second support portion. The first support portion and the second support portion extend outward from two opposite sides of the lens body to connect the circuit substrate and the housing. The second support portion has a recessed portion to be combined with the rugged structure.
[0010] The present invention also discloses that the rugged structure is arranged on the side wall of the stopper facing the lens element. The rugged structure is a recessed structure, and the lens element has a protrusion to be inserted into the recessed structure; or the rugged structure is a protrusion structure to be inserted into the recessed part of the lens element. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 FIG. 4 is a schematic diagram of the appearance of an optical detection device according to an embodiment of the present invention.
[0012] Figure 2 It is a structural cross-sectional view of an optical detection device according to the first embodiment of the present invention.
[0013] Figure 3 FIG. 4 is a structural cross-sectional view of an optical detection device according to a second embodiment of the present invention.
[0014] Figure 4 It is a structural cross-sectional view of an optical detection device according to a third embodiment of the present invention.
[0015] Figure 5 FIG. 4 is a cross-sectional view of the structure of an optical detection device according to a fourth embodiment of the present invention.
[0016] Figure 6 It is a structural cross-sectional view of an optical detection device according to a fifth embodiment of the present invention.
[0017] Figure 7 4 is a cross-sectional view of the structure of an optical detection device according to a sixth embodiment of the present invention.
[0018] Figure 8 FIG. 4 is a structural cross-sectional view of an optical detection device according to a seventh embodiment of the present invention.
[0019] Fig. 9 4 is a cross-sectional view of the structure of an optical detection device according to an eighth embodiment of the present invention.
[0020] Fig.10 It is a structural cross-sectional view of an optical detection device in the prior art.
[0021] The reference numerals are described as follows: 10, 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10H Optical Inspection Devices 12 Circuit board 14, 14B lens elements 16 Shell 18 electrodes 20 Accommodation cavity 22 Opening structure 24, 24B, 24C, 24F, 24G, 24H Rugged Structure 26 external hole edge 28 Block 30 Stop surface 32 Sidewall 34 Lens body 36 first support portion 38, 38B second support portion 381 outer side 382 inner side 40 inner side 42, 42G protrusion 44, 44H recessed part 46 Sidewall 100 optical detection device 102 Circuit Board 104 electrodes 106 lens elements 108 Shell 110 holes 112 Support surface 114 retaining wall L1, L2 discharge path A The central axis of the opening structure D1 horizontal direction D2 vertical direction W1 Structural width of the first support part W2 Structural width of the second support part DETAILED DESCRIPTION See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the appearance of an optical detection device 10 according to an embodiment of the present invention, Figure 2 FIG. 1 is a cross-sectional view of the structure of an optical detection device 10A according to the first embodiment of the present invention. The optical detection device 10 with the same appearance may have a variety of internal structural designs; for example, Figure 2 The optical detection device 10A shown may include a circuit substrate 12, a lens element 14, and a housing 16. The circuit substrate 12 may have a plurality of electrodes 18 for connecting to other electronic components of the optical detection device 10A to provide electronic signals. The distribution and number of the electrodes 18 are not limited to Figure 1 The implementation shown depends on the design requirements.
[0022] The lens element 14 may be disposed on the circuit substrate 12 and installed in the housing 16 together with the circuit substrate 12. The housing 16 may include an integrally formed accommodation cavity 20, an opening structure 22, and a rugged structure 24. The accommodation cavity 20 may be used to accommodate the circuit substrate 12 and the lens element 14. The opening structure 22 may be connected to the accommodation cavity 20, and the lens element 14 may receive an optical signal outside the housing 16 by using the opening structure 22. The rugged structure 24 may surround the opening structure 22 to engage the lens element 14, and utilize the surface undulation characteristics of the rugged structure 24 to extend the opening structure 22 to the electrostatic discharge path closest to the electrode 18 among the plurality of electrodes 18.
[0023] Generally speaking, the opening structure 22 and the rugged structure 24 of the shell 16 are preferably symmetrically designed, that is, the multiple distances from each section of the outer hole edge 26 of the opening structure 22 to each corresponding section of the rugged structure 24 can have the same value, or the difference between the multiple distances is less than the first predetermined threshold; the sections of the outer hole edge 26 refer to multiple connected sections that can be evenly divided by the outer hole edge 26, and the rugged structure 24 can also be evenly divided into multiple sections with the same parameters. The actual value of the first predetermined threshold is determined according to the overall size of the shell 16, which is not described in detail here. Therefore, all directions of the opening structure 22 and the rugged structure 24 can have the same or similar discharge path L1, and the discharge path L2 can be defined as from the rugged structure 24 through the air barrier to the closest electrode 18 among the multiple electrodes 18, so the discharge path L1 and the discharge path L2 can be combined to form an electrostatic discharge path from the opening structure 22 to the closest electrode 18. The present invention preferably changes the discharge path L1 to extend the electrostatic discharge path.
[0024] In particular, the central axis A of the opening structure 22 and the multiple intervals of each section of the outer hole edge 26 may have the same value, or the difference between the multiple intervals is less than the second predetermined threshold; in other words, the hole of the opening structure 22 may preferably be designed to be circular, but the actual application is not limited thereto. The actual value of the second predetermined threshold is determined according to the aperture size of the opening structure 22, so it will not be described in detail.
[0025] like Figure 2 As shown, the housing 16 may further include a stopper 28 and a stop surface 30. The stopper 28 is disposed at a position adjacent to the lens element 14 on one side relative to the opening structure 22. The rugged structure 24 can cooperate with the stopper 28 to fix the lens element 14 in a clamping manner, thereby limiting the movement of the lens element 14 in the horizontal direction D1 to fix the lens element 14 in the housing 16; the lens element 14 can be disposed on the circuit substrate 12 and pressed in the housing 16, so the cooperation between the circuit substrate 12 and the housing 16 can limit the movement of the lens element 14 in the vertical direction D2. The stop surface 30 can be located at a position adjacent to the side wall 32 of the opening structure 22 and abutting against the lens element 14. The rugged structure 24 can be protrudingly disposed at a position between the lens element 14 and the opening structure 22 of the stop surface 30, which has the functions of fixing the lens element 14 and extending the electrostatic discharge path.
[0026] The lens element 14 may include a lens body 34, a first support portion 36, and a second support portion 38. The first support portion 36 and the second support portion 38 may extend outward from two opposite sides of the lens body 34. The first support portion 36 may abut against and be connected to the circuit substrate 12. The second support portion 38 abuts against the housing 16 and is clamped by the rugged structure 24 and the stopper 28 to limit its movement. Figure 2 As shown, the rugged structure 24 can stop at the inner side surface 40 of the lens body 34 adjacent to the second support portion 38; since the rugged structure 24 can be protruded and set on the stop surface 30, the second support portion 38 can preferably be more retracted to make room to accommodate the large-sized rugged structure 24, that is, the structural width W2 of the second support portion 38 can be smaller than the structural width W1 of the first support portion 36.
[0027] See also Figure 3 , Figure 3 FIG. 1 is a cross-sectional view of the structure of an optical detection device 10B according to a second embodiment of the present invention. Generally speaking, the optical detection devices 10A and 10B have the same appearance, such as Figure 1 Therefore, in the second embodiment, the components with the same number as those in the first embodiment have the same structure and function, and will not be described again. The lens element 14B of the optical detection device 10B may have two support portions with the same structural width, and the structural width W2 of the second support portion 38B may be the same as or similar to the structural width W1 of the first support portion 36, and the housing 16 may be provided with a small-sized rugged structure 24B on the stop surface 30, and the rugged structure 24B also has the function of fixing the lens element 14 and extending the electrostatic discharge path.
[0028] See also Figures 4 to 6 , Figure 4 is a structural cross-sectional view of an optical detection device 10C according to a third embodiment of the present invention, Figure 5 is a structural cross-sectional view of an optical detection device 10D according to a fourth embodiment of the present invention, Figure 6 FIG. 1 is a cross-sectional view of the structure of an optical detection device 10E according to a fifth embodiment of the present invention. In these embodiments, the components with the same numbers as those in the above-mentioned embodiments have the same structure and function, and will not be described again. Figure 4 As shown, the housing 16 may have a stop surface 30, which is connected to the side wall 32 of the opening structure 22 and abuts against the lens element 14; the rugged structure 24C of the third embodiment is not protrudingly arranged on the stop surface 30, but may be formed concavely at a position of the stop surface 30 facing the lens element 14. The structural width W2 of the second support portion 38 of the lens element 14 may be substantially the same as or similar to the structural width W1 of the first support portion 36; however, the lens element 14 may further have a protrusion 42, which is arranged at one end of the second support portion 38 relative to the first support portion 36, for inserting the rugged structure 24C.
[0029] The overall size of the protrusion 42 is preferably the same as or similar to the overall size of the rugged structure 24C, so that the protrusion 42 can be inserted into the rugged structure 24C in a tight fit, so that the second support portion 38 and its protrusion 42 can be tightly restricted by the circuit substrate 12, the stop block 28, the stop surface 30 and the rugged structure 24C in their movement along the first horizontal direction D1 and the second vertical direction D2. In other words, the rugged structure 24C of the third embodiment can have the functions of fixing the lens element 14 and extending the electrostatic discharge path. Figure 4 As shown, the protrusion 42 is disposed at a position adjacent to the second supporting portion 38 and opposite to the outer side surface 381 of the lens body 34 , but the design position of the protrusion 42 is not limited thereto.
[0030] like Figure 5 As shown, the protrusion 42 can also be selectively arranged at a position close to the inner side surface 382 of the lens body 34 adjacent to the second support portion 38; in the fourth embodiment, the rugged structure 24C is still formed inwardly at a position of the stop surface 30 facing the lens element 14, but its actual position can be closer to the side wall 32 of the opening structure 22. Figure 6 As shown, the protrusion 42 can be further selectively disposed in the middle section between the outer side surface 381 and the inner side surface 382 of the second supporting portion 38; in the fifth embodiment, the rugged structure 24C can be formed concavely at a position of the stop surface 30 facing the lens element 14 and located in the central range of the stop surface 30. The rugged structure 24C of the fourth embodiment and the fifth embodiment can both provide the functions of fixing the lens element 14 and extending the electrostatic discharge path.
[0031] See also Figure 7 , Figure 7 1 is a structural cross-sectional view of an optical detection device 10F according to a sixth embodiment of the present invention. In the sixth embodiment, the components with the same number as those in the aforementioned embodiment have the same structure and function, and will not be described again herein. The shell 16 of the sixth embodiment may have a stop surface 30, which is connected to the side wall 32 of the opening structure 22 and abuts against the lens element 14; the rugged structure 24F may be protrudingly disposed at a position of the stop surface 30 aligned with the lens element 14. Accordingly, the second support portion 38 of the lens element 14 may have a recessed portion 44, which is formed at one end of the second support portion 38 relative to the first support portion 36. The rugged structure 24F of the shell 16 will be inserted into the recessed portion 44 of the lens element 14, which can provide the functions of fixing the lens element 14 and extending the electrostatic discharge path.
[0032] See also Figure 8 and Fig. 9 , Figure 8 is a structural cross-sectional view of an optical detection device 10G according to a seventh embodiment of the present invention, Fig. 9FIG. 1 is a cross-sectional view of the structure of an optical detection device 10H according to an eighth embodiment of the present invention. In the seventh and eighth embodiments, the components with the same numbers as those in the above-mentioned embodiments have the same structure and function, and will not be described again. Figure 8 As shown, the shell 16 of the seventh embodiment can set the rugged structure 24G on the side wall 46 of the stopper 28 facing the lens element 14; in addition, the rugged structure 24G can be a recessed structure, and the protrusion 42G of the lens element 14 can be set on the outer side surface 381 of the second support portion 38 relative to the lens body 34, so as to insert the rugged structure 24G designed as a recessed structure.
[0033] like Fig. 9 As shown, the rugged structure 24H of the eighth embodiment can be designed as a protruding structure, and the recessed portion 44H of the lens element 14 is formed on the outer side surface 381 of the second support portion 38 relative to the lens body 34, and the rugged structure 24H designed as a protruding structure can be inserted into the recessed portion 44H. The rugged structure 24G of the seventh embodiment and the rugged structure 24H of the eighth embodiment can both provide the functions of fixing the lens element 14 and extending the electrostatic discharge path.
[0034] In the present invention, the structural cross-sectional views of these embodiments should preferably be designed as symmetrical structures, that is, the electrostatic discharge path can have the same or similar path length in any direction, and its path length will be significantly greater than the electrostatic discharge path of the structure type in the prior art, so as to ensure that static electricity can be discharged smoothly no matter from which direction it enters the optical detection device. In other possible embodiments, even if the structural cross-sectional view belongs to the state of an asymmetrical structure, the electrostatic discharge path from the opening structure of the shell to the electrode still needs to be designed to have the same path length in all directions, and will be greater than the electrostatic discharge path of the structure type in the prior art, so as to ensure that static electricity will be discharged through the preset electrostatic discharge path, thereby enhancing the electrostatic protection effectiveness of the optical detection device of the present invention.
[0035] In summary, the optical detection device of the present invention is usually made of a non-conductive material such as plastic to provide electrostatic protection, but the shell is provided with an opening structure for the lens element to receive external light signals, so the electrostatic discharge path is from the opening structure through the air barrier in the shell to the nearest electrode on the circuit substrate. The lens element of the optical detection device will stop between the circuit substrate and the opening structure of the shell, and the electrostatic discharge path will extend into the housing cavity of the shell through the gap between the lens element and the shell. In order to significantly lengthen the length of the electrostatic discharge path, the present invention provides a variety of implementations to increase the structural complexity and gap length between the lens element and the shell, such as reducing the width of the support portion of the lens element, adding a protruding or concave rugged structure in the shell that can be used to snap into the lens element, forming a protruding portion or a recessed portion on the support portion of the lens element to snap into the corresponding rugged structure, etc., so that the electrostatic release path can be lengthened without changing the appearance of the optical detection device, and the opening structure and rugged structure of the shell, as well as the structural features of the protruding portion or the recessed portion of the lens element are formulated in detail to ensure that the shortest discharge path of the optical detection device can reach the nearest electrode with an electrostatic protection design along the preset electrostatic release path.
[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An optical detection device with an optimal electrostatic protection effect, characterized in that: The optical detection device comprises: A circuit substrate having a plurality of electrodes; A lens element is disposed on the circuit substrate; and The shell includes a housing cavity and an opening structure, wherein the housing cavity is used to accommodate the circuit substrate and the lens element, and the opening structure is connected to the housing cavity. The shell also includes a rugged structure, which surrounds the opening structure and is used to engage the lens element to extend the opening structure to the electrostatic release path closest to the electrode among the multiple electrodes.
2. The optical detection device according to claim 1, characterized in that: A plurality of distances from each section of the outer hole edge of the opening structure to each corresponding section of the rugged structure have the same value, or a difference between the plurality of distances is less than a predetermined threshold.
3. The optical detection device according to claim 1, characterized in that: The central axis of the opening structure and the multiple intervals of each section of the outer hole edge of the opening structure have the same value, or the difference between the multiple intervals is less than a predetermined threshold.
4. The optical detection device according to claim 1, characterized in that: The housing further comprises a stopper which is arranged adjacent to a side of the lens element relative to the opening structure, and the rugged structure cooperates with the stopper to fix the lens element.
5. The optical detection device according to claim 1, characterized in that: The shell body has a stop surface connected to the side wall of the opening structure and abutting against the lens element. The rugged structure is protrudingly arranged at a position between the lens element and the opening structure on the stop surface.
6. The optical detection device according to claim 1, characterized in that: The lens element includes a lens body, a first supporting portion and a second supporting portion. The first supporting portion and the second supporting portion extend outward from two opposite sides of the lens body to connect the circuit substrate and the shell. The rugged structure stops at the inner side surface of the second supporting portion adjacent to the lens body.
7. The optical detection device according to claim 6, characterized in that: The structural width of the second supporting portion is the same as that of the first supporting portion, or is smaller than the structural width of the first supporting portion.
8. The optical detection device according to claim 1, characterized in that: The shell body also has a stop surface, which is connected to the side wall of the opening structure and abuts against the lens element. The rugged structure is concavely formed at a position of the stop surface facing the lens element.
9. The optical detection device according to claim 1, characterized in that: The lens element comprises a lens body, a first supporting portion and a second supporting portion. The first supporting portion and the second supporting portion extend outwards from two opposite sides of the lens body to connect the circuit substrate and the housing. The second supporting portion has a protrusion to be inserted into the rugged structure.
10. The optical detection device according to claim 9, characterized in that: The protrusion is arranged on the outer side surface of the second supporting part opposite to the lens body, or on the inner side surface of the second supporting part adjacent to the lens body, or on the middle section of the second supporting part between the inner side surface and the outer side surface.
11. The optical detection device according to claim 1, characterized in that: The shell body also has a stop surface, which is connected to the side wall of the opening structure and abuts against the lens element. The rugged structure is protrudingly arranged at a position of the stop surface aligned with the lens element.
12. The optical detection device according to claim 1, characterized in that: The lens element includes a lens body, a first supporting portion and a second supporting portion. The first supporting portion and the second supporting portion extend outward from two opposite sides of the lens body to connect the circuit substrate and the shell. The second supporting portion has a recessed portion to be combined with the rugged structure.
13. The optical detection device according to claim 4, characterized in that: The rugged structure is arranged on a side wall of the stopper facing the lens element.
14. The optical detection device according to claim 13, characterized in that: The rugged structure is a concave structure, and the lens element has a protrusion to be inserted into the concave structure.
15. The optical detection device according to claim 13, characterized in that: The rugged structure is a protruding structure used to be inserted into the recessed portion of the lens element.