Fixed wafer OCR character code reader

Abstract

The utility model relates to the technical field of optical sensor manufacturing, in particular to a fixed wafer OCR character code reader. The optical lens group comprises a left plastic fixing piece, a right plastic fixing piece, a limiting cover plate, a front convex lens and a rear convex lens. A first left two-way limiting bayonet and a first left one-way limiting bayonet are formed in the left plastic fixing piece, and a first right two-way limiting bayonet and a first right one-way limiting bayonet are formed in the right plastic fixing piece. The first left bidirectional limiting bayonet and the first right bidirectional limiting bayonet are used as a vertical insertion foundation of the front convex mirror, the first left unidirectional limiting bayonet and the first right unidirectional limiting bayonet are used as side leaning foundations of the rear convex mirror, and side leaning is achieved through the limiting cover plate. The front convex lens is assembled in a vertical insertion mode, and the rear convex lens is assembled in a side leaning mode, so that the phenomenon of rigid contact between the front convex lens and the rear convex lens due to assembly operation errors can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of optical sensor manufacturing, in particular to a fixed wafer OCR character reader. Background Art

[0002] During the wafer production stage, a fixed wafer OCR character reader is needed to read the OCR characters on it to know the character number on each wafer for subsequent traceability.

[0003] The fixed wafer OCR character reader is mainly composed of a housing and an optical lens group. The optical lens group is used to realize optical scanning and reflection detection of characters, and is built into the housing. The main structure of the optical lens group is a front convex mirror and a rear convex mirror arranged in sequence along the front and back directions. In the prior art, two opposing silicone strips are usually used to fix the front convex mirror and the rear convex mirror. Each silicone strip is provided with a front card slot and a rear card slot. The two opposing front card slots cooperate to limit the front convex mirror, and the two opposing rear card slots cooperate to limit the rear convex mirror. According to the design requirements, the gap between the front convex mirror and the rear convex mirror is extremely small (less than 0.5mm). During the vertical insertion process of the front convex mirror and the rear convex mirror, if the operator is not careful, the two may easily collide with each other, and the optical functional surface may be scratched or damaged. Furthermore, due to its material characteristics, the silicone strip is relatively soft and lacks structural strength. Therefore, in actual use, the front and rear convex mirrors experience significant vibration amplitudes due to the excitation force, which not only increases the probability of rigid contact between the two mirrors but also inevitably affects image quality. Therefore, it is urgent for those skilled in the art to solve this problem. Utility Model Content

[0004] Therefore, in view of the above existing problems and defects, the research and development team of this utility model project collected relevant information, conducted multiple evaluations and considerations, and after continuous experiments and modifications by the project research and development team members, finally led to the emergence of this fixed wafer OCR character reader.

[0005] In order to solve the above-mentioned technical problems, the utility model relates to a fixed wafer OCR character reader, which is used to extract characters engraved on a wafer into machine-readable text. The fixed wafer OCR character reader includes a structural frame, a protective shell and an optical lens group. The structural frame is wrapped by the protective shell, and the two cooperate to form a receiving cavity. The optical lens group is used to realize optical scanning and reflection detection of characters, and is built-in and installed in the receiving cavity. The optical lens group includes a left-mounted plastic fixing part, a right-mounted plastic fixing part, a limiting cover, a front convex mirror and a rear convex mirror. The left-mounted plastic fixing part and the right-mounted plastic fixing part are detachably fixed to the left and right side walls of the structural frame respectively. Along the front-to-back direction, a first left-mounted two-way limiting snap-in and a first left-mounted one-way limiting snap-in are sequentially formed on the left-mounted plastic fixing part, and a first right-mounted two-way limiting snap-in and a first right-mounted one-way limiting snap-in are sequentially formed on the right-mounted plastic fixing part. The first left-mounted bidirectional limiter and the first right-mounted bidirectional limiter are positioned opposite each other and work together to limit the front convex mirror's freedom of movement in the fore-aft direction. The first left-mounted unidirectional limiter and the first right-mounted unidirectional limiter are positioned opposite each other and work together with the limit cover plate to limit the rear convex mirror's freedom of movement in the fore-aft direction. The vertical position limit cover plate is used to position the rear convex mirror from the side and top, and is assembled with the structural frame as the foundation.

[0006] As a further improvement of the technical solution disclosed in the present utility model, the structural frame is a split structure, which is assembled in sequence by a front frame split part, a left frame split part, a rear frame split part, and a right frame split part. The front frame split part is composed of a plate body, a left plug-in arm, and a right plug-in arm. The left plug-in arm and the right plug-in arm are both formed by extending backward from the plate body and are arranged opposite to each other. The limiting cover plate is respectively connected to the left plug-in arm and the right plug-in arm in a detachable manner by means of a left screw and a right screw. The limiting cover plate is formed with a left-mounted mounting through hole for the left screw to pass through and a right-mounted mounting through hole for the right screw to pass through. The left plug-in arm is formed with a left-mounted threaded hole for the left screw to be screwed in. The right plug-in arm is formed with a right-mounted threaded hole for the right screw to be screwed in.

[0007] As a further improvement to the technical solution disclosed in this utility model, before the front and rear convex mirrors are installed, the left and right plastic fasteners remain free. Under the combined pushing force from the front and rear convex mirrors, the left plastic fastener contacts the left insertion arm, while the right plastic fastener contacts the right insertion arm. The freedom of movement of the left and right plastic fasteners in the fore-and-aft direction is cooperatively limited by the limit cover and the plate body.

[0008] As a further improvement of the technical solution disclosed in the present utility model, after the front convex mirror and the rear convex mirror are installed in place, the left plastic fixing part and the right plastic fixing part are kept in a critical contact state relative to the limit cover plate.

[0009] As a further improvement to the technical solution disclosed in this utility model, the optical lens assembly also includes a filter. The filter is mounted on the plate body and aligned with the front convex mirror. A light-transmitting notch is provided in the plate body, corresponding to the pre-installed position of the filter.

[0010] As a further improvement of the technical solution disclosed in the present utility model, the left-placed plastic fixing part and the right-placed plastic fixing part are preferably PC plastic injection molded parts.

[0011] In practical applications, the fixed wafer OCR character reader disclosed in the present utility model can achieve at least the following beneficial technical effects, specifically:

[0012] 1) The left-mounted plastic fixing, right-mounted plastic fixing, and limiting cover plate work together to fix the relative positions of the front convex mirror and the rear convex mirror. That is, the first left-mounted two-way limiting snap-in and the first right-mounted two-way limiting snap-in are used as the vertical insertion basis of the front convex mirror, while the first left-mounted one-way limiting snap-in and the first right-mounted one-way limiting snap-in are used as the side leaning basis of the rear convex mirror, and the limiting cover plate is used to achieve lateral pressure. The front convex mirror adopts a vertical insertion method for assembly, while the rear convex mirror abandons the vertical insertion method and innovatively adopts a side leaning method for assembly. This can effectively avoid the occurrence of accidental rigid contact between the front convex mirror and the rear convex mirror due to assembly operator errors;

[0013] 2) Thanks to the innovative structural design and material selection of the left and right plastic fixings, while achieving the design goal of protecting the front and rear convex mirrors from contact wear, both maintain good structural strength and rigidity, thereby effectively reducing the amplitude of the front and rear convex mirrors caused by the excitation force, not only avoiding rigid contact between the two, but also ensuring imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a three-dimensional schematic diagram of the fixed wafer OCR character reader disclosed in the utility model under the first viewing angle.

[0016] Figure 2 It is also a three-dimensional schematic diagram of the fixed wafer OCR character reader disclosed in the present invention under the first viewing angle (with the protective shell hidden).

[0017] Figure 3 This is a three-dimensional schematic diagram of the fixed wafer OCR character reader disclosed in the present utility model under the second viewing angle (with the protective shell hidden).

[0018] Figure 4 This is a three-dimensional schematic diagram of the fixed wafer OCR character reader disclosed in the present utility model under the third viewing angle (with the protective shell hidden).

[0019] Figure 5 It is a three-dimensional schematic diagram of the structural frame of the fixed wafer OCR character reader disclosed in the utility model.

[0020] Figure 6 It is a three-dimensional schematic diagram of a front frame split part in the fixed wafer OCR character reader disclosed in the utility model from one viewing angle.

[0021] Figure 7 It is a three-dimensional schematic diagram of the front frame split component in the fixed wafer OCR character reader disclosed in the utility model from another perspective.

[0022] Figure 8 The utility model is a three-dimensional schematic diagram of an optical lens assembly in a fixed wafer OCR character reader disclosed in one viewing angle.

[0023] Figure 9 It is a three-dimensional schematic diagram of the optical lens group in the fixed wafer OCR character reader disclosed in the utility model under another viewing angle.

[0024] Figure 10 It is a three-dimensional schematic diagram of a limit cover plate in the fixed wafer OCR character reader disclosed in the utility model.

[0025] Figure 11 The utility model is a three-dimensional schematic diagram of a left-placed plastic fixing part in a fixed wafer OCR character reader disclosed in the utility model.

[0026] Figure 12 The utility model is a three-dimensional schematic diagram of a right-placed plastic fixing part in a fixed wafer OCR character reader disclosed in the utility model.

[0027] Figure 13 yes Figure 3 A magnified view of the I part.

[0028] Figure 14 yes Figure 4 Partially enlarged view of II.

[0029] 1-Structural frame; 11-Front frame split piece; 111-Board body; 1111-Light-transmitting notch; 112-Left plug-in arm; 1121-Left threaded hole; 113-Right plug-in arm; 1131-Right threaded hole; 12-Left frame split piece; 13-Rear frame split piece; 14-Right frame split piece; 2-Protective shell; 3-Optical lens group; 31-Left plastic fixing piece; 311- First left-mounted two-way limiting bayonet; 312-first left-mounted one-way limiting bayonet; 32-right-mounted plastic fixing piece; 321-first right-mounted two-way limiting bayonet; 322-first right-mounted one-way limiting bayonet; 33-limiting cover; 331-left-mounted mounting through hole; 332-right-mounting through hole; 34-front convex mirror; 35-rear convex mirror; 36-left-mounted screw; 37-right-mounted screw; 38-filter. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] As wafer manufacturing technology rapidly advances, optical character recognition (OCR) technology, a key technology, is becoming an important means of improving production efficiency and ensuring product quality. Fixed-mount wafer OCR barcode readers use industrial cameras to capture images and, through image processing and character recognition algorithms, convert the imaged characters into editable text.

[0032] The following is a detailed description of the present invention in conjunction with specific embodiments. Figure 1 、 Figure 2 The following diagrams illustrate the fixed-wafer OCR character reader disclosed in this utility model in two different states from the first viewing angle. It can be seen that it is primarily composed of a structural frame 1, a protective shell 2, and an optical lens assembly 3. The structural frame 1 is enclosed by the protective shell 2, and the two cooperate to form a receiving cavity. The optical lens assembly 3 is used to perform optical scanning and reflection detection of characters and is internally mounted in the receiving cavity.

[0033] like Figure 8 、 9 As shown in FIG, the optical lens assembly 3 mainly consists of a left plastic fixing 31, a right plastic fixing 32, a limit cover 33, a front convex mirror 34, and a rear convex mirror 35. The left plastic fixing 31 and the right plastic fixing 32 are both PC plastic injection molded parts, and are detachably fixed to the left and right side walls of the structural frame 1. Figure 11 、 12 As shown in , along the front to rear direction, the left plastic fixing part 31 is sequentially formed with a first left-placed two-way limiting snap-in 311 and a first left-placed one-way limiting snap-in 312, while the right plastic fixing part 32 is sequentially formed with a first right-placed two-way limiting snap-in 321 and a first right-placed one-way limiting snap-in 322. The first left-placed two-way limiting snap-in 311 and the first right-placed two-way limiting snap-in 321 are positioned relative to each other, and cooperate with each other to limit the displacement freedom of the front convex mirror 34 along the front and rear directions. The first left-placed one-way limiting snap-in 312 and the first right-placed one-way limiting snap-in 322 are positioned relative to each other, and cooperate with the limiting cover plate 33 to limit the displacement freedom of the rear convex mirror 35 along the front and rear directions. The vertical limiting cover plate 33 is used to limit the side top position of the rear convex mirror 35, which uses the structural frame 1 as the assembly basis (as shown in FIG. Figure 2 、 3 , as shown in 4).

[0034] By adopting the above-mentioned technical solution, the left-mounted plastic fixing member 31, the right-mounted plastic fixing member 32, and the limiting cover plate 33 cooperate to fix the relative positions of the front convex mirror 34 and the rear convex mirror 35. That is, the first left-mounted two-way limiting bayonet 311 and the first right-mounted two-way limiting bayonet 321 serve as the vertical insertion basis for the front convex mirror 34, while the first left-mounted one-way limiting bayonet 312 and the first right-mounted one-way limiting bayonet 322 serve as the side-leaning basis for the rear convex mirror 35, and the side-leaning is achieved by the limiting cover plate 33. The front convex mirror 34 is assembled by vertical insertion, while the rear convex mirror 35 abandons the vertical insertion method and innovatively adopts the side-leaning method for assembly. This effectively prevents the occurrence of accidental rigid contact between the front convex mirror 34 and the rear convex mirror 35 due to operator error.

[0035] Furthermore, thanks to the innovative structural design and material selection of the left plastic fixing part 31 and the right plastic fixing part 32, while achieving the design goal of protecting the front convex mirror 34 and the rear convex mirror 35 from contact wear, both maintain good structural strength and structural rigidity, thereby effectively reducing the amplitude value of the front convex mirror 34 and the rear convex mirror 35 caused by the excitation force, which not only avoids rigid contact between the two, but also ensures the imaging quality.

[0036] Under the premise of ensuring that the design strength of the structural frame 1 meets the application requirements, in order to reduce the difficulty of assembly and manufacturing costs, Figure 5As shown in FIG, the structural frame 1 is preferably a split structure, which is assembled in sequence from the front frame split part 11, the left frame split part 12, the rear frame split part 13, and the right frame split part 14. The front frame split part 11 is composed of a plate body 111, a left insertion arm 112, and a right insertion arm 113. The left insertion arm 112 and the right insertion arm 113 are both formed by extending backward from the plate body 111 and are placed opposite each other (as shown in FIG). Figure 6 、 7 As shown in ). The left insertion arm 112 and the right insertion arm 113 are both formed with a snap-on protrusion. Correspondingly, the left frame split part 12 and the right frame split part 14 are provided with a snap-on notch that matches the snap-on protrusion. And when the left frame split part 12 is snapped into place relative to the left insertion arm 112 and the right frame split part 14 is snapped into place relative to the right insertion arm 113, in order to further enhance the connection stability and reliability, they are tightened with the help of the left countersunk screw and the right countersunk screw (as shown in Figure 4 、 5 ).

[0037] like Figure 13 、 14 As shown in FIG, the limiting cover plate 33 is detachably fixedly connected to the left insertion arm 112 and the right insertion arm 113 respectively by means of a left screw 36 and a right screw 37. The limiting cover plate 33 is formed with a left mounting through hole 331 for the left screw 36 to pass through and a right mounting through hole 332 for the right screw 37 to pass through (as shown in FIG. Figure 10 ). The left-positioned insertion arm 112 is formed with a left-positioned threaded hole 1121 for the left-positioned screw 36 to be screwed in. The right-positioned insertion arm 113 is formed with a right-positioned threaded hole 1131 (as shown in FIG. Figure 7 By adopting the above technical solution, on the one hand, the position limiting cover plate 33 has an extremely simple installation method and realizes reliable pressure against the rear convex mirror 35; on the other hand, it is easy to perform subsequent maintenance and replacement operations on the position limiting cover plate 33.

[0038] Here, it is also necessary to emphasize that, in order to simplify the design structure and installation method of the left plastic fixing part 31 and the right plastic fixing part 32, before the front convex mirror 34 and the rear convex mirror 35 are installed, the left plastic fixing part 31 and the right plastic fixing part 32 are kept in a free state. Under the joint pushing force from the front convex mirror 34 and the rear convex mirror 35, the left plastic fixing part 31 is in contact with the left plug-in arm 112, and the right plastic fixing part 32 is in contact with the right plug-in arm 113. The displacement freedom of the left plastic fixing part 31 and the right plastic fixing part 32 in the front-to-back direction is cooperatively limited by the limiting cover plate 33 and the plate body 111. And after the front convex mirror 34 and the rear convex mirror 35 are installed in place, the left plastic fixing part 31 and the right plastic fixing part 32 are kept in a critical contact state relative to the limiting cover plate 33 (such as Figure 13 、 14 As shown in ). In this way, on the one hand, the displacement freedom of the front convex mirror 34 and the rear convex mirror 35 in the front-to-back direction is ensured to be within the design value allowable range, ensuring excellent imaging quality and facilitating the recognition and extraction of wafer characters; on the other hand, the left plastic fixing member 31 and the right plastic fixing member 32 are prevented from arching due to excessive pressure, ensuring that the front convex mirror 34 and the rear convex mirror 35 maintain good positional accuracy for a long time.

[0039] Finally, it should be noted that Figure 1 As shown in FIG, the plate body 111 is also equipped with a filter 38, which is located opposite to the front convex mirror 34. Corresponding to the pre-installed position of the filter 38, a light-transmitting notch 1111 (as shown in FIG) is opened on the plate body 111. Figure 6 、 7 ). Filter 38 is an optical element with selective transmission, reflection, or absorption properties. Based on the principle of optical interference, it can significantly reduce light reflection, enhance image capture sensitivity, and reduce background noise. This effectively improves the imaging accuracy of the fixed wafer OCR character reader, thereby facilitating the rapid and accurate extraction of characters engraved on the wafer.

[0040] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fixed wafer OCR character reader, used to extract characters engraved on a wafer into machine-readable text; the fixed wafer OCR character reader comprises a structural frame, a protective shell, and an optical lens assembly; the structural frame is enclosed by the protective shell, and the two cooperate to form a receiving cavity; the optical lens assembly is used to perform optical scanning and reflection detection of characters, and is built into and installed in the receiving cavity, characterized in that: The optical lens group includes a left-mounted plastic fixing part, a right-mounted plastic fixing part, a limiting cover, a front convex mirror and a rear convex mirror; the left-mounted plastic fixing part and the right-mounted plastic fixing part are detachably fixed to the left and right side walls of the structural frame respectively; along the front to rear direction, the left-mounted plastic fixing part is sequentially formed with a first left-mounted two-way limiting snap-in and a first left-mounted one-way limiting snap-in, and the right-mounted plastic fixing part is sequentially formed with a first right-mounted two-way limiting snap-in and a first right-mounted one-way limiting snap-in; the first left-mounted two-way limiting snap-in and the first right-mounted two-way limiting snap-in are positioned relative to each other, and cooperate with each other to limit the displacement freedom of the front convex mirror along the front and rear directions; the first left-mounted one-way limiting snap-in and the first right-mounted one-way limiting snap-in are positioned relative to each other, and cooperate with the limiting cover to limit the displacement freedom of the rear convex mirror along the front and rear directions; the limiting cover in the vertical state is used to limit the side top of the rear convex mirror, and it uses the structural frame as the assembly basis.

2. The fixed wafer OCR character reader according to claim 1, characterized in that: The structural frame is a split structure, which is assembled in sequence from the front frame split part, the left frame split part, the rear frame split part, and the right frame split part; The front frame split component is composed of a plate body, a left-placed plug-in arm and a right-placed plug-in arm; the left-placed plug-in arm and the right-placed plug-in arm are both extended backward from the plate body and are arranged opposite to each other; the limiting cover plate is respectively connected to the left-placed plug-in arm and the right-placed plug-in arm by means of a left-placed screw and a right-placed screw; the limiting cover plate is formed with a left-placed mounting through hole for the left-placed screw to pass through and a right-placed mounting through hole for the right-placed screw to pass through; the left-placed plug-in arm is formed with a left-placed threaded hole for the left-placed screw to be screwed in; the right-placed plug-in arm is formed with a right-placed threaded hole for the right-placed screw to be screwed in.

3. The fixed wafer OCR character reader according to claim 2, characterized in that: Before the front convex mirror and the rear convex mirror are installed, the left plastic fixing part and the right plastic fixing part are both kept in a free state; under the joint pushing force from the front convex mirror and the rear convex mirror, the left plastic fixing part is in contact with the left plug-in arm, and the right plastic fixing part is in contact with the right plug-in arm; the displacement freedom of the left plastic fixing part and the right plastic fixing part in the front-to-back direction is cooperatively limited by the limiting cover plate and the plate body.

4. The fixed wafer OCR character reader according to claim 3, characterized in that: When the front convex mirror and the rear convex mirror are installed in place, the left plastic fixing member and the right plastic fixing member are both kept in a critical contact state relative to the limiting cover plate.

5. The fixed wafer OCR character reader according to any one of claims 2 to 4, characterized in that: The optical lens group also includes a filter; the filter is installed on the plate body and is aligned with the front convex mirror; a light-transmitting notch is opened on the plate body corresponding to the pre-installed position of the filter.

6. The fixed wafer OCR character reader according to any one of claims 1 to 4, characterized in that: The left plastic fixing part and the right plastic fixing part are both PC plastic injection molding parts.

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