Frame structure for fastening lens and image detection device

Abstract

The utility model provides a frame structure for fastening a lens and an image detection device. The frame structure comprises a structure body, a lens module and an adjusting piece, the lens module comprises two columns of lenses, the two columns of lenses are linearly and sequentially arranged at equal intervals in a staggered mode in the scanning direction, and each column of lenses obliquely face the object plane; the structure body is provided with a bearing groove used for containing all the lenses, and containing spaces matched with all the lenses are formed in the bearing groove. A protruding structure is arranged on the side, close to the lens, of the adjusting piece, and the inclination angle of the face, facing the lens, of the protruding structure is the same as the inclination angle of the lens close to the protruding structure. Through holes are formed in the two ends of the adjusting piece, and round holes corresponding to the through holes in a one-to-one mode are formed in the bearing groove. The frame is simple in structure, and the distance between the two columns of lenses is effectively reduced, so that the deviation between images in the auxiliary scanning direction is reduced, and the problem of image scanning failure is solved.

Description

Technical Field

[0001] The present application relates to the field of image detection, and more specifically, to a frame structure for fastening a lens and an image detection device. Background Art

[0002] By means of optical magnification imaging, magnification scanning is performed using array-type alternately arranged magnification imaging modules, which can achieve high-resolution imaging of the target image on the object surface without changing the existing CIS (Contact Image Sensor) structure. For example, the patent application with application number 202211180946.1 submitted by the same applicant realizes full-coverage magnification imaging and acquisition of the image to be detected on the object surface by designing array-type alternately arranged magnification imaging modules.

[0003] In actual use, it was found that the image detection device failed to scan images. This is because the device uses two rows of chips and lenses to form images in the secondary scanning direction. Due to a certain distance difference between the two rows of lenses, there is a deviation between the two rows of images obtained by scanning. If the deviation is too large, the digital processing part of the chip does not have enough capacity to process the image, resulting in the failure of image formation.

[0004] Therefore, it is urgent to solve the problem of large deviation between the two columns of images in the sub-scanning direction caused by the large distance deviation between the two columns of lenses. Utility Model Content

[0005] The purpose of the present application is to provide a frame structure for fastening a lens and an image detection device.

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

[0007] The present application provides a frame structure for fastening a lens, comprising a structure body, a lens module, and an adjusting member;

[0008] Furthermore, the lens module comprises two rows of lenses, the two rows of lenses are arranged in sequence with equal spacing and staggered linearly along the scanning direction, and each row of lenses is tilted toward the object plane;

[0009] Furthermore, the structural body is provided with a supporting groove for accommodating each lens, and the supporting groove is formed with an accommodating space adapted to each lens;

[0010] Furthermore, a protruding structure is provided on one side of the adjusting member close to the lens, and the inclination angle of a side of the protruding structure facing the lens is the same as the inclination angle of the lens close to the protruding structure;

[0011] Furthermore, through holes are provided at both ends of the adjusting member, and the supporting groove is provided with round holes corresponding one to one to the through holes.

[0012] Preferably, it further comprises an elastic gasket, wherein the elastic gasket is arranged between the adjusting member and the lens;

[0013] Further, the adjusting member includes two adjusting members arranged opposite to each other.

[0014] Furthermore, a nut is built into the circular hole of the supporting groove, and the screw passes through the through hole on the adjusting member and is tightened with the nut in the corresponding circular hole of the supporting groove.

[0015] Preferably, the two adjusting members are connected by screws passing through the through holes, and the two screws at both ends of the two adjusting members are screwed into the through holes in opposite directions.

[0016] The present application also provides an image detection device, comprising the aforementioned frame structure for fastening a lens and:

[0017] Furthermore, it also includes an imaging structure for optical imaging;

[0018] A photoelectric conversion structure is used to convert the optical signal obtained by imaging into an analog signal for output;

[0019] The light source structure provides lighting source for the product.

[0020] The embodiments of the present application provide a frame structure for fastening lenses and an image detection device that have at least the following beneficial effects: by tightening the adjustment member and the supporting groove, the two rows of lenses are squeezed, so that the deviation of the distance between the two rows of lenses is shortened, thereby reducing the deviation between the two rows of images in the sub-scanning direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional schematic diagram of an existing image detection device is shown;

[0022] Figure 2 The scanning image result of an existing image detection device is shown;

[0023] Figure 3 A partial structural schematic diagram of a frame structure for fastening a lens provided in an embodiment of the present application is shown;

[0024] Figure 4 for Figure 3 The schematic diagram of the cross-section of the frame structure of the fastening lens is shown along the AA section;

[0025] Figure 5 A schematic diagram of a frame structure for fixing a lens in other embodiments of the present application is shown;

[0026] Figure 6 A schematic diagram of a frame structure for fastening a lens in some further embodiments of the present application is shown;

[0027] Figure 7 The scanning image result after the frame structure is adjusted according to the embodiment of the present application is shown.

[0028] Numbers in the figure

[0029] 1-scanning object surface, 2-frame structure, 31-first lens, 32-second lens, 4-photoelectric conversion chip, 41-first photoelectric conversion chip, 42-second photoelectric conversion chip, 5-chip substrate, 6-structural body, 7-adjusting piece, 8-supporting groove, 71-first adjusting piece, 711-first through hole structure, 7111-first screw, 711-first through hole structure, 712-second through hole structure, 7121-second screw, 72-second adjusting piece, 73-protruding structure, 8a1-first circular hole, 811-first nut, 8a2-second circular hole, 821-second nut, 9-elastic gasket, 10-third adjusting piece, 101-third countersunk hole structure, 102-third threaded structure, 103-third screw, 11-fourth adjusting piece, 111-fourth countersunk hole structure, 112-fourth threaded structure, 8b1-third through hole structure, 8b2-fourth through hole structure. DETAILED DESCRIPTION

[0030] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0031] In addition, various components on the drawings are enlarged or reduced in size for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.

[0032] Words importing the singular also include the plural and vice versa.

[0033] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the products of the embodiments of the present application are usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, in order to distinguish different units, the words first, second, etc. are used in this specification, but these are not limited by the order of manufacture, nor can they be understood as indicating or implying relative importance, and their names may be different in the detailed description and claims of the present application.

[0034] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.

[0035] The specific embodiments of the present application will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 A cross-sectional schematic diagram of an existing image detection device is shown; Figure 1 As shown, the image detection device includes a frame structure 2 and an imaging part and a photoelectric conversion part mounted inside the frame structure.

[0037] The imaging part includes an array of first lenses 31 and an array of second lenses 32, each of which is composed of a plurality of lenses arranged at equal intervals along the scanning direction, and the two rows of lenses are staggered with each other.

[0038] Specifically, each lens is assembled from a lens barrel and a plurality of lenses. Preferably, the lens barrel is made of metal to increase the stability of the structure; the front end angle of the lens barrel is 4-5° to avoid interference. The shape of the lens can be circular, or it can be processed at both ends to form a long strip, so as to be more conducive to a miniaturized structure.

[0039] The photoelectric conversion part converts the optical signal obtained by imaging into an analog signal for output. The photoelectric conversion module includes a chip substrate 5 on which a photoelectric conversion chip 4 (a first photoelectric chip 41 and a second photoelectric chip 42) is mounted. Each photoelectric conversion chip is arranged in a one-to-one correspondence with each lens in the imaging light path direction; preferably, the photoelectric conversion chip 4 is a linear sensor chip.

[0040] In specific implementation, Figure 1 It can be seen from the optical path in that the focus position of the array of the first lens 31 on the scanning object plane 1 is O1, and the focus position of the array of the second lens 32 on the scanning object plane 1 is O2. In theoretical design, the focus positions O1 and O2 of the two should be at the same point, but in practice, due to component processing errors or assembly errors, the assembly positions of the two columns of lenses or frame structures will deviate from the design plan, which will result in a deviation of ΔD between the focus positions O1 and O2. If ΔD is too large, the deviation of the two columns of images obtained after imaging by the two columns of lenses in the sub-scanning direction will be too large; Figure 2The scanning image result of an existing image detection device is shown, in which X is the main scanning direction, Y is the sub-scanning direction, and ΔY is the deviation of the two columns of images obtained after the two columns of lenses are imaged in the sub-scanning direction. If ΔY is too large, the data processing part in the chip will not have enough capacity for image processing.

[0041] To solve the above problems, the present application provides a frame structure for fastening the lens, such as Figure 3 As shown, the frame structure includes a structural body 6, a lens module, and an adjustment member 7;

[0042] In a specific implementation, the lens module includes two columns of lenses, an array of first lenses 31 and an array of second lenses 32. The two columns of lenses are arranged in sequence with staggered linear and equidistant spacing along a scanning direction (during image scanning, the extension direction of the lens array is generally used as the scanning direction), and each column of lenses is tilted toward the object plane; preferably, the tilt angle is between 8-10°.

[0043] The structural body 6 can be made of metal and plastic materials, but from the overall structure of the structural body 6, metal materials are heavy and costly, which is not conducive to subsequent manufacturing and production. Therefore, plastic PC materials that are easy to shape are preferred. The structural body 6 is provided with a supporting groove 8 for accommodating two rows of lenses; the supporting groove 8 forms an accommodating space adapted to each lens.

[0044] A protruding structure 73 is provided on one side of the adjusting member 7 close to the lens, and the inclination angle of the side of the protruding structure 73 facing the lens is the same as the inclination angle of the lens close to it; through holes are provided at both ends of the adjusting member 7, and circular holes corresponding to the through holes are provided on the supporting groove 8. Preferably, the adjusting member 7 includes two adjusting members arranged opposite to each other, and the number of the protruding structures 73 is consistent with the number of the corresponding lenses in each column, so that each lens can be guaranteed to correspond to a protruding structure 73, and then each lens can be evenly stressed, ensuring that the distance between the two columns of lenses is shortened to an ideal deviation, thereby scanning an ideal image.

[0045] Furthermore, the frame structure for fastening the lens also includes an elastic gasket 9, which is arranged between the adjusting member 7 and the lens; preferably, the elastic gasket 9 can be made of materials such as rubber.

[0046] Figure 4 for Figure 3 The schematic diagram of the partial structure of the frame structure of the fastening lens is shown cut along AA; Figure 4 As shown, the protruding structure 73 of the adjusting member 7 faces the side of the lens and is set at a certain angle; preferably, the angle is set the same as the tilt angle of the lens, and the tilt angle is between 8-10 degrees, so as to better fit the lens, squeeze without gaps, and apply force better.

[0047] Figure 5 FIG. 4 is a schematic diagram showing a frame structure of a fastening lens in other embodiments of the present application; Figure 5 As shown, the structural body 6 and the supporting groove 8 are made of plastic materials that are easy to form, preferably PC and other materials. A corresponding circular hole is provided on the supporting groove 8, and the nut is pressed into the circular hole. Preferably, the nut is made of copper material or stainless steel material. There is a thread inside the nut, and in order to increase the friction between it and the supporting groove 8, the outer ring has a knurling structure and the like. Through-hole structures are provided at both ends of the adjustment member 7. Taking the first through-hole structure 711 at one end of the first adjustment member 71 as an example, the first screw 7111 passes through the first through-hole structure 711 and is screwed into the first nut 811 in the first circular hole 8a1. Similarly, the second through-hole structure 712 of the first adjustment member 71 is also tightened in the same way that the second screw 7121 is screwed into the second nut 821 of the second circular hole 8a2. Thus, the first adjustment member 71 is tightened with the supporting groove 8. Furthermore, the first adjustment member 71 is close to the lens protrusion structure 73 and presses the corresponding lenses one by one. An elastic gasket 9 is provided between each lens and the corresponding protrusion structure 73. The elastic gasket 9 can be embedded in the supporting groove 8 as a whole or can be flexibly and directly taken out. In the specific implementation, while tightening the screws, each protrusion structure 73 of the first adjustment member 71 presses the corresponding elastic gasket 9, and further presses the lens through elastic extrusion without damaging the corresponding lens. The second adjustment member 72 adopts the same or similar structure as the first adjustment member, and will not be described in detail. In this way, the pressure of the first adjustment member 71 and the second adjustment member 72 ensures that the first lens 31 and the second lens 32 are close to the inner wall of the supporting groove 8, thereby reducing the distance deviation ΔD between the two columns of lenses, thereby reducing the deviation ΔY between the images in the secondary scanning direction.

[0048] In some preferred embodiments, the nut is pressed into the round hole of the supporting groove by using processes such as hot pressing; the screw is screwed into the nut with a large torque. Since the elastic gasket 9 will generate a certain reverse elastic force after being squeezed, and the thread hole directly processed by the supporting groove 8 made of plastic material is prone to thread slippage, which in turn causes the nut to slip out of the supporting groove 8.

[0049] Therefore, a more suitable structure is needed to take into account the solution of high torque tightening. To solve this problem, the present application also provides a frame structure for fastening the lens, which can withstand high torque and effectively avoid the problem of thread slippage. Figure 6 FIG. 4 shows a schematic diagram of a frame structure for fixing a lens in some other embodiments of the present application. Figure 5 As shown, the structural body 6 and the supporting groove 8 of the frame structure are still made of plastic material that is easy to form, and the two adjustment parts are connected by screws passing through the through holes, and the two screws at both ends of the two adjustment parts are screwed into the through holes in reverse.

[0050] In a specific embodiment, Figure 6 As shown, the following is explained in combination with the structure of two adjustment parts (the third adjustment part 10 and the fourth adjustment part 11); the third adjustment part 10 is provided with a third countersunk hole structure 101 and a third threaded structure 102, and the fourth adjustment part 11 is provided with a fourth countersunk hole structure 111 and a fourth threaded structure 112. The third countersunk hole structure 101 on the third adjustment part 10, the fourth threaded structure 112 of the fourth adjustment part 11, and the third through-hole structure 8b1 form a straight line in a fixed direction. The fourth countersunk hole structure 111 on the fourth adjustment part 11, the third threaded structure 102 of the third adjustment part 10, and the fourth through-hole structure 8b2 form a straight line in a fixed direction. It can be seen that the structural setting of the third adjustment part 10 and the structural setting of the fourth adjustment part 11 are reversely symmetrical structural settings. Furthermore, the third screw 103 passes through the third adjusting member 10 and the third through-hole structure 8b1 and is screwed into the fourth thread structure 112 at the corresponding position on the fourth adjusting member 11, so as to tighten the third adjusting member 10 and the fourth adjusting member 11 and the third through-hole structure 8b1 on the corresponding side; the other ends of the third adjusting member 10 and the fourth adjusting member 11 and the fourth through-hole structure 8b2 are also tightened in the same manner; preferably, an elastic gasket 9 is added between the adjusting member 7 and the lens. In this tightening manner, the third screw 103 has enough length to pass through the third countersunk hole structure 101 of the third adjusting member 10 and the third through-hole structure 8b1 of the supporting groove and tighten with the fourth thread structure 112 of the opposite fourth adjusting member 11, which greatly increases the resistance to thread slippage, and the third adjusting member 10 and the fourth adjusting member 11 have double screw connections at both ends, which ensures that the frame structure is stable and reliable, and is suitable for occasions that withstand large torque and maintain stable connections.

[0051] In some preferred embodiments, the third adjustment member 10 and the fourth adjustment member 11 can be made of metal material and can be adjusted multiple times.

[0052] Figure 7 The scanning image result after the frame structure is adjusted according to the embodiment of the present application is shown as follows: Figure 7 As shown, after adjustment, there is still a certain deviation ΔY2 between the two columns of images in the sub-scanning direction. This deviation ΔY2<ΔY, and the deviation of ΔY2 can meet the memory capacity of the image processing chip.

[0053] The present application also provides an image detection device, including the above-mentioned frame structure for fastening a lens, as well as an imaging structure, a photoelectric conversion structure, and a light source structure.

[0054] The imaging structure includes two rows of lenses that are staggered and arranged linearly and at equal intervals. Preferably, the lenses are convex lenses that can form a certain magnification ratio for optical imaging.

[0055] The photoelectric conversion structure includes a photoelectric conversion substrate and an imaging chip mounted thereon. The imaging chip and the lens are in a one-to-one correspondence and are used to convert the optical signal obtained by imaging into an analog signal for output.

[0056] The light source structure provides lighting source for the product.

[0057] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A frame structure for fastening a lens, characterized in that: It includes a structural body, a lens module, and an adjustment part; The lens module comprises two rows of lenses, the two rows of lenses are arranged in sequence with equal spacing and staggered linearly along the scanning direction, and each row of lenses is tilted toward the object plane; The structural body is provided with a supporting groove for accommodating each lens, and the supporting groove forms an accommodating space adapted to each lens; A convex structure is provided on one side of the adjusting member close to the lens, and the inclination angle of the side of the convex structure facing the lens is the same as the inclination angle of the lens close to the convex structure; Through holes are arranged at both ends of the adjusting member, and circular holes corresponding to the through holes are arranged on the supporting groove.

2. A frame structure for fastening a lens according to claim 1, characterized in that: Also included is an elastic gasket, which is arranged between the adjusting member and the lens.

3. The frame structure for fastening a lens according to claim 1, characterized in that: The adjusting member comprises two adjusting members arranged opposite to each other.

4. The frame structure for fastening a lens according to claim 1, characterized in that: A nut is built into the circular hole of the supporting groove, and a screw passes through a through hole on the adjusting piece and is tightened with the nut in the corresponding circular hole of the supporting groove.

5. The frame structure for fastening a lens according to claim 3, characterized in that: The two adjusting parts are connected by screws passing through the through holes.

6. A frame structure for fastening a lens according to claim 5, characterized in that: The two screws at the two ends of the two adjusting members are screwed into the through holes in opposite directions.

7. An image detection device, comprising a frame structure for fastening a lens as claimed in claim 1, characterized in that: Also included is an imaging structure for optical imaging; A photoelectric conversion structure is used to convert the optical signal obtained by imaging into an analog signal for output; The light source structure provides lighting source for the product.

Images