An image sensor

Abstract

The application relates to the technical field of image scanning, in particular to an image sensor which comprises a support, a frame body and an end cover connected to the end of the support and the frame body, the support is connected to the bottom of the frame body, the middle part of the frame body is penetrated along the X-axis direction, the two end parts of the frame body are sealed around in the YZ plane, a first chamber with a sealed periphery and a penetrated middle part is formed, the top of the frame body is provided with an opening which is connected with the first chamber in a penetrating mode along the Z-axis direction, a glass is mounted on the top opening of the frame body, and the end cover is detachably and sealingly connected with the end of the frame body through a sealing gasket. The application can effectively prevent external impurities such as dust and water vapor from entering the inside of the first chamber, avoids pollution or corrosion of the core components in the first chamber, greatly reduces the equipment failure risk caused by impurities, guarantees long-term stable operation of the equipment, and has the advantages of good sealing performance, high practicability and the like.

Description

Technical Field

[0001] This application relates to the field of image scanning technology, and more specifically, to an improvement in the structure of an image sensor. Background Technology

[0002] Image sensors, as key components for acquiring image information, are characterized by their ability to accurately scan originals to distinguish their authenticity or acquire the information contained within them. Their performance directly affects the quality of the image and the effectiveness of subsequent image processing.

[0003] In existing technologies, image sensors generally include main components such as a frame, bracket, light source, light-transmitting plate, PCB circuit board, and lens. Among these, the frame is a crucial component of the image sensor, housing a linearly arranged light source. A lens is also positioned above the photosensitive part, playing a vital role in image focusing and imaging. The frame is fixed to a profile with adhesive. The frame and bracket are connected by screws. A base plate connects the frame and bracket, and photosensitive integrated circuits arranged in a straight line are mounted on top of the base plate. These integrated circuits are responsible for converting light signals into electrical signals. Depending on the application requirements, a digital signal processing board can be added to the back of the base plate for further processing and analysis of the image signals. While this connection method is simple, in actual assembly, the screws only serve a locking function and cannot provide positioning. This makes the assembly accuracy of the image sensor highly susceptible to environmental influences during assembly and transportation, resulting in large cumulative errors in the assembled components. It is difficult to guarantee accuracy and airtightness, and gaps between components can easily lead to dust and moisture ingress, affecting the normal operation and lifespan of the image sensor.

[0004] Therefore, it is urgent to improve the structure of traditional image sensors to solve the problem of poor performance of internal electronic components caused by dust and moisture entering the image sensor. Utility Model Content

[0005] The purpose of this application is to provide an image sensor to solve the problems of poor sealing and easy entry of dust and moisture into the interior of the prior art.

[0006] The embodiments of this application can be implemented through the following technical solutions:

[0007] An image sensor includes a bracket, a frame, and end caps connected to the ends of the bracket and the frame. The bracket is connected to the bottom of the frame. The middle of the frame is through-through along the X-axis, and its two ends are sealed around the perimeter in the YZ plane, forming a first chamber that is sealed around the perimeter and through-through in the middle. The top of the frame has an opening that is through-through to the first chamber along the Z-axis, and glass is installed in the top opening of the frame.

[0008] The end cap is detachably and sealed to the end of the frame via a sealing gasket.

[0009] Furthermore, the bracket and the frame are an integral structure, together forming a frame.

[0010] Furthermore, the end cap has a sealing gasket receiving groove in the YZ plane for accommodating the sealing gasket, the sealing gasket receiving groove corresponding to the first chamber and arranged along the circumference of the first chamber.

[0011] Furthermore, the first chamber includes a mounting groove disposed at the lower part of the frame and extending along the X direction, a base plate slidably connected along the X direction is disposed in the mounting groove, and a photosensitive integrated plate is connected at the center of the base plate;

[0012] The first chamber also includes an elongated cavity extending in the X direction in the upper part of the frame, the cavity communicating with the top of the mounting groove, together forming the first chamber.

[0013] Furthermore, a connecting rib extending along the Y direction is provided above the cavity, and the connecting rib serves as the top wall of one end of the first chamber that is sealed in the YZ plane.

[0014] Furthermore, a lens and a molding strip are installed inside the cavity. The lens is connected to one side of the shaped molding strip along the X direction and corresponds to the photosensitive integrated plate.

[0015] Furthermore, the profile is a regularly shaped elongated structure made of aluminum material, and the profile is positioned and connected to the reference surface inside the cavity along the Y direction.

[0016] Furthermore, one side of the profile strip and one inner side of the cavity are provided with reference surfaces that cooperate with each other. One side of the frame is provided with a plurality of second threaded holes arranged along the X direction and communicating with the reference surface of the cavity along the Y direction. A fixing screw is threaded into the second threaded hole. One end of the fixing screw passes through the second threaded hole and connects to the reference surface of the profile strip, and pulls the reference surface of the profile strip to abut against the reference surface on the inner side of the cavity.

[0017] Furthermore, the bottom of the profile is provided with a support platform extending along the Y direction toward the side where the lens is located. The lens is connected to the side of the profile opposite to its reference surface, and its bottom is connected to the support platform.

[0018] Furthermore, the base plate is positioned and connected to the reference surface inside the mounting groove along the Y direction, and the reference surface of the profile and the reference surface of the base plate are located on the same side.

[0019] The image sensor provided by the embodiments of this application has at least the following beneficial effects:

[0020] On the one hand, this application achieves comprehensive sealing protection for the first chamber by sealing the two ends of the frame around the YZ plane, and by connecting the end caps to the frame ends through sealing gaskets to form a detachable sealing connection. Combined with the glass installed at the top opening of the frame, this effectively prevents external impurities such as dust and moisture from entering the first chamber, avoiding contamination or corrosion of the core components inside the chamber. This significantly reduces the risk of equipment failure caused by impurities, ensures long-term stable operation of the equipment, and has advantages such as good sealing performance and strong practicality.

[0021] On the other hand, this application installs a lens and a profile strip within the cavity. The profile strip is a rigid strip made of aluminum material, possessing a certain degree of hardness and a regular shape. The lens is connected to one side of the profile strip along the X-direction and corresponds to the photosensitive integrated plate. The profile strip plays a calibration and buffering role in the lens mounting structure. In terms of calibration, it prevents the profile strip from deforming under the torsion of the cavity, thereby affecting the installation position of the lens. It corrects the lens installation deviation caused by the torsion of the cavity, provides a correct installation reference for the lens, and ensures the accuracy of the optical system. In terms of buffering, the cooperation between the profile strip and the cavity can indirectly enhance the deformation resistance of the overall structure. Its rigid support can reduce the structural deformation of the frame caused by external impact or vibration during transportation and use, reduce the probability of connection gaps between components due to deformation, and further consolidate the sealing and stability of the overall structure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an image sensor in the prior art;

[0023] Figure 2 This is a schematic diagram of the structure of an image sensor according to this application;

[0024] Figure 3 This is a schematic diagram of the structure of an image sensor in the glass-removed state according to this application;

[0025] Figure 4 This is a schematic diagram of the overall structure of the framework in this application;

[0026] Figure 5 This is a schematic diagram of the end cap structure in this application.

[0027] Numbers in the diagram

[0028] 1-Frame; 10-Bracket; 100-First chamber; 101-Mounting groove; 102-Cavity; 105-Second threaded hole; 106-Threaded connection hole; 11-Frame body; 110-Connecting rib; 12-Glass; 13-Base plate; 14-Lens; 15-Photosensitive integrated board; 16-Shaped strip; 19-Sealing gasket; 2-End cap; 21-Sealing gasket receiving groove. Detailed Implementation

[0029] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0030] Furthermore, for ease of understanding, various components on the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application.

[0031] Singular forms of words also include plural meanings, and vice versa.

[0032] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0033] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0034] For ease of description, using Figure 1 The extension direction of the image sensor is the X-axis direction, the direction perpendicular to the X-axis in the same horizontal plane is the Y-axis direction, and the vertical direction perpendicular to the XY plane is the Z-axis direction.

[0035] Figure 1 This is a schematic diagram of the structure of an image sensor in the prior art, such as... Figure 1As shown, the existing image sensor includes a bracket 10 and a frame 11 extending along the X-direction. The bracket 10 and frame 11 are separate structures, fixed together by screws. A base plate 13 connects the bracket 10 and frame 11, and a photosensitive integrated plate 15 is mounted on the base plate 13. The top of the frame 11 is open and extends along the X-direction. A lens 14 is installed inside the cavity of the frame 11, and a glass 12 is installed on the top. The light beam passes through the glass and enters the cavity of the frame 11, and is focused onto the photosensitive integrated plate 15 by the lens 14 inside the cavity to form a clear image. However, because the ends of the frame 11 are open at the top, they are not properly positioned. The sidewalls create constraints. When the end cap 2 is connected to the end of the frame 11, there will be a connection gap between the frame 11 and the end cap 2. This allows dust and moisture to enter the interior through the connection gap, causing damage to electronic components. In addition, when the split-design bracket 10 and frame 11 are fixed with screws, it is difficult to ensure the stability and accuracy of the product assembly. This can easily lead to a small gap or misalignment between the frame and the bracket, which in turn affects the installation position of the base plate 13. This causes the center position of the photosensitive integrated board 15 on the base plate 13 to shift from that of the lens 14, thereby affecting the measurement accuracy of the entire image sensor.

[0036] Therefore, the applicant improved the structure of the image sensor. Figure 2 This is a schematic diagram of the image sensor structure in this application. Figure 3 This is a schematic diagram of the structure of an image sensor in the glass-removed state according to this application, as shown below. Figure 2 , Figure 3 As shown, an image sensor includes a bracket 10 and a frame 11. The bracket 10 is connected to the bottom of the frame 11. The middle of the frame 11 is through the X-axis, and its two ends are sealed around the YZ plane to form a first chamber 100 that is sealed around the sides and has a through center. The top of the frame 11 has an opening that is through the first chamber 100 along the Z-axis. A glass 12 is installed in the top opening of the frame 11.

[0037] Furthermore, the image sensor also includes an end cap 2, such as Figure 5 As shown, the end cap 2 is connected to the end of the bracket 10 and the frame 11. The end cap 2 is detachably and sealed to the end of the frame 11 through the sealing gasket 19 to improve the overall airtightness of the image sensor, effectively prevent dust, moisture and other impurities from entering the interior, and extend the service life of the device.

[0038] In some preferred embodiments, such as Figure 3As shown, the bracket 10 and the frame 11 are an integral structure, which together constitute the frame 1. This eliminates the connection gap and assembly error between the two, and significantly improves the rigidity of the entire frame 1. On the one hand, it can effectively resist the influence of vibration and impact in the external environment and reduce structural deformation during assembly and transportation. On the other hand, it can also avoid the cumulative error caused by the relative displacement between components, fundamentally improving the structural accuracy of the image sensor.

[0039] In some preferred embodiments, the end cap 2 is connected to the end of the frame 1. The end of the end cap 2 is provided with a sealing gasket receiving groove 21 in the YZ plane for accommodating the sealing gasket 19. The sealing gasket receiving groove 21 corresponds to the first chamber 100 and is arranged circumferentially along the outer edge of the first chamber 100. It is used to precisely seal the first chamber 100, protect the core components such as photosensitive integrated circuits inside the first chamber 100 from contamination and damage, ensure the stability of IC performance, and thus extend the service life of the equipment.

[0040] In some preferred embodiments, the first chamber 100 includes a mounting groove 101 disposed at the lower part of the frame 11 and extending along the X direction. A base plate 13 slidably connected along the X direction is disposed in the mounting groove 101. A photosensitive integrated plate 15 is connected to the center of the base plate 13. The first chamber 100 also includes an elongated cavity 102 extending along the X direction in the upper part of the frame 11. The cavity 102 communicates with the top of the mounting groove 101, together forming the first chamber 100, providing a relatively enclosed space for the photosensitive integrated plate 15. At the same time, the continuous space formed by the elongated cavity 102 and the mounting groove 101 can ensure the smoothness of the optical path, so that the light can reach the photosensitive integrated plate 15 smoothly, ensuring the stability and efficiency of the optical signal conversion process, and providing a foundation for good imaging of the image sensor.

[0041] In some preferred embodiments, a connecting rib 110 extending in the Y direction is provided above the cavity 102, such as... Figure 4 As shown, the connecting rib 110 serves as the top wall of one end of the first chamber 100 in the YZ plane, which is sealed. It is used to cooperate with other wall surfaces to form a complete end sealing structure, constrain the side wall of the frame 11, enhance the overall structural strength of the frame 11, and reduce the deformation of the frame 11 when subjected to external forces or environmental influences.

[0042] In some preferred embodiments, a lens 14 and a profile strip 16 are installed within the cavity 102. Preferably, the profile strip 16 is a rigid strip made of aluminum material, possessing a certain degree of hardness and a regular shape. The lens 14 is connected along the X-direction to one side of the shaped profile strip 16 and corresponds to the photosensitive integrated plate 15. The profile strip 16 plays a calibration and buffering role in the lens 14 mounting structure. In terms of calibration, it prevents the profile strip 16 from deforming under the torsion of the cavity 102, thereby affecting the installation position of the lens 14. It corrects the lens installation deviation caused by the torsion of the cavity 102, provides a correct installation reference for the lens, and ensures the accuracy of the optical system. In terms of buffering, the cooperation between the profile strip 16 and the cavity 102 can indirectly enhance the deformation resistance of the overall structure. Its rigid support can reduce the structural deformation of the frame caused by external impact or vibration during transportation and use, reduce the probability of connection gaps between components due to deformation, and further consolidate the sealing and stability of the overall structure.

[0043] In some preferred embodiments, the profile 16 is positioned and connected along the Y direction to a reference surface inside the cavity 102. The reference surface of the profile 16 and the reference surface of the base plate 13 are located on the same side. This is used to eliminate the relative error when the profile 16 and the base plate 13 are installed by means of references arranged on the same side, and to ensure that the preset size design of the lens 14 on the profile 16 and the photosensitive integrated plate 15 on the base plate 13 to achieve center correspondence will not be deviated due to installation error.

[0044] In some preferred embodiments, a reference surface is provided on one side of the profile 16 and on one inner side of the cavity 102. The reference surface of the profile 16 mates with the reference surface of the cavity 102. A plurality of second threaded holes 105 arranged along the X direction and communicating with the reference surface of the cavity 102 along the Y direction are provided on one side of the frame 11. Fixing screws are threaded into the plurality of second threaded holes 105 respectively. One end of the fixing screw passes through the second threaded hole 105 and connects to the reference surface of the profile 16. The screw applies a pulling force along the Y direction, pulling the reference surface of the profile 16 to abut against the reference surface on the inner side of the cavity 102, which is used to position the installation position of the profile 16 in the cavity 102 and improve the positioning accuracy.

[0045] In some preferred embodiments, the bottom of the profile 16 is provided with a support platform extending along the Y direction toward the side where the lens 14 is located. The lens 14 is attached to the side of the profile 16 facing away from its reference surface, and its bottom is connected to the support platform. This is used to position the bottom of the lens 14 through the support platform and to prevent the lens 14 from sliding downward under the action of gravity, thereby increasing the stability of the connection.

[0046] In some preferred embodiments, the base plate 13 is positioned and connected to the reference surface inside the mounting groove 101 along the Y direction, for positioning the mounting position of the base plate 13. Preferably, the reference surfaces of the base plate 13 and the profile 16 are located on the same side, and the same side is used as the positioning reference surface to improve positioning accuracy.

[0047] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An image sensor, comprising a bracket (10), a frame (11), and an end cap (2) connected to the ends of the bracket (10) and the frame (11), characterized in that: The bracket (10) is connected to the bottom of the frame (11). The middle part of the frame (11) is through the X-axis, and its two ends are sealed around the YZ plane to form a first chamber (100) that is sealed around the four sides and through the middle. The top of the frame (11) is provided with an opening that is through the first chamber (100) along the Z-axis. The top opening of the frame (11) is fitted with glass (12). The end cap (2) is detachably and sealed to the end of the frame (11) via a sealing gasket (19).

2. The image sensor according to claim 1, characterized in that: The bracket (10) and the frame (11) are an integral structure, together forming the frame (1).

3. The image sensor according to claim 1, characterized in that: The end cap (2) has a sealing gasket receiving groove (21) for accommodating the sealing gasket (19) in the YZ plane. The sealing gasket receiving groove (21) corresponds to the first chamber (100) and is arranged circumferentially along the outer edge of the first chamber (100).

4. The image sensor according to claim 1, characterized in that: The first chamber (100) includes a mounting groove (101) disposed at the lower part of the frame (11) and extending along the X direction. A base plate (13) is provided in the mounting groove (101) and slidably connected along the X direction. A photosensitive integrated plate (15) is connected at the center of the base plate (13). The first chamber (100) also includes an elongated cavity (102) extending in the X direction in the upper part of the frame (11), the cavity (102) communicating with the top of the mounting groove (101) to jointly constitute the first chamber (100).

5. The image sensor according to claim 4, characterized in that: A connecting rib (110) extending along the Y direction is provided above the cavity (102), and the connecting rib (110) serves as the top wall of one end of the first chamber (100) in the YZ plane.

6. The image sensor according to claim 4, characterized in that: A lens (14) and a strip (16) are installed inside the cavity (102). The lens (14) is connected to one side of the shaped strip (16) along the X direction and corresponds to the photosensitive integrated plate (15).

7. The image sensor according to claim 6, characterized in that: The profile (16) is a regular-shaped long strip structure made of aluminum material, and the profile (16) is positioned and connected to the reference surface inside the cavity (102) along the Y direction.

8. The image sensor according to claim 6, characterized in that: One side of the profile (16) and one inner side of the cavity (102) are provided with reference surfaces that cooperate with each other. One side of the frame (11) is provided with several second threaded holes (105) arranged in the X direction and communicating with the reference surface of the cavity (102) in the Y direction. A fixing screw is threaded in the second threaded hole (105). One end of the fixing screw passes through the second threaded hole (105) and connects with the reference surface of the profile (16), and pulls the reference surface of the profile (16) to abut against the reference surface inside the cavity (102).

9. The image sensor according to claim 6, characterized in that: The bottom of the profile (16) is provided with a support platform extending along the Y direction toward the side where the lens (14) is located. The lens (14) is connected to the side of the profile (16) facing away from its reference surface, and its bottom is connected to the support platform.

10. The image sensor according to claim 8, characterized in that: The base plate (13) is positioned and connected to the reference surface inside the mounting groove (101) along the Y direction, and the reference surface of the profile (16) and the reference surface of the base plate (13) are located on the same side.

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