Online OCR (Optical Character Recognition) device

Abstract

The utility model relates to industrial reading equipment, in particular to an online OCR (Optical Character Recognition) device. Comprising a cross bar unit used for fixing an OCR code reader. The transverse rod unit is fixed to the top end of the Y-axis unit perpendicular to the transverse rod unit, and the middle of the Y-axis unit is detachably installed on an adjusting block unit. An X-axis unit is installed on the adjusting block unit, and a clamp unit is installed at the end of the X-axis unit. The clamp unit comprises a bottom plate, a movable finger and a fixed finger, a T-shaped guide groove is formed in the bottom surface of the bottom plate, a T-shaped structure in sliding fit with the T-shaped guide groove is arranged at the root of the movable finger, a screw supporting seat is fixedly mounted on the end surface of one end of the bottom plate, and an adjusting screw is rotationally mounted on the screw supporting seat; the adjusting screw rod penetrates through the screw rod supporting seat, extends into the T-shaped guide groove and is in threaded connection with the T-shaped structure; and the fixed fingers are tightly matched with the insertion holes of the bottom plate. A manual handheld mode can be replaced, the code scanning work is completed by installing the OCR handheld terminal on the support device, and labor force is liberated.

Description

Technical Field

[0001] The utility model relates to industrial reading equipment, in particular to an online OCR recognition device. Background Art

[0002] The OCR handheld terminal is a portable device that integrates OCR technology. It is used to automatically identify and extract barcode information from product label printing materials. It has good wireless mobile operability: especially in industrial scenarios where large amounts of product data or barcodes need to be frequently processed, it greatly improves work efficiency and accuracy.

[0003] During the product circulation and transportation process of manufacturing enterprises, it is necessary to use OCR handheld terminals to scan the character strings and other information on the product packaging to collect and understand product information. However, the transportation methods of manufacturing enterprises' products are diverse. Some products need to be transported manually through a transfer cart, and manual labor can directly use the OCR terminal to scan and enter the code during the transportation process. Others transport products through a conveyor line, and the transported materials need to be scanned and entered. In this case, it is inconvenient to operate the manual handheld terminal for online work, which restricts people's freedom and has low scanning efficiency. Summary of the invention

[0004] The utility model aims at the defects of the prior art and provides an online OCR recognition device.

[0005] To achieve the above purpose, the utility model adopts the following technical solution, including a crossbar unit for fixing the OCR reader; the crossbar unit is fixed to the top of the Y-axis unit perpendicular to it, and the middle part of the Y-axis unit is detachably mounted on an adjustment block unit.

[0006] The adjusting block unit is detachably mounted with an X-axis unit, and the end of the X-axis unit is mounted with a clamp unit.

[0007] The clamp unit includes a base plate, a movable finger fixed to the bottom surface of the base plate and a fixed finger. The two fingers are arranged in parallel and are used for clamping and fixing on the conveyor line support leg. A T-shaped guide groove running through the bottom surface of the base plate is provided, and a T-shaped structure slidingly matched with the T-shaped guide groove is provided at the root of the movable finger. The T-shaped structure is inserted into the T-shaped guide groove, so that the movable finger can move back and forth along the T-shaped guide groove. A screw support seat is fixedly installed on the end surface of one end of the base plate, and an adjusting screw is rotatably installed on the screw support seat. The adjusting screw passes through the screw support seat and then extends into the T-shaped guide groove and is threadedly connected with the T-shaped structure. The fixed finger is tightly matched with the socket of the base plate through the fixed finger plug rod.

[0008] Furthermore, the adjustment block unit adopts a rectangular block body, and the rectangular block body is provided with an X-axis rod mounting hole and a Y-axis vertical rod mounting hole.

[0009] Furthermore, the crossbar unit includes a crossbar body, a connecting rod, and a fixed frame fixed to the top of the Y-axis unit, wherein the crossbar body is connected to one end of the connecting rod, and the other end of the connecting rod is fixedly connected to the fixed frame, and the center lines of the crossbar body, the connecting rod, and the fixed frame are collinear; the OCR reader is installed in the fixed frame, and a fill light is installed on the side wall of the fixed frame.

[0010] Furthermore, the Y-axis unit includes a Y-axis upright rod perpendicular to the cross bar body, and a fixed head is provided at one end of the Y-axis upright rod for fixing the cross bar unit; the other end of the Y-axis upright rod passes through the Y-axis upright rod mounting hole at the top of the adjustment block unit, and a Y-axis upright rod locking handle is provided on one side wall of the adjustment block unit; the Y-axis upright rod is provided with at least 5 positioning holes 2 at equal intervals along the longitudinal direction, and the Y-axis upright rod locking handle is threadedly connected to the adjustment block unit. After the Y-axis upright rod locking handle is screwed into the adjustment block unit, it extends into any one of the positioning holes 2 to lock the Y-axis upright rod in position, so that the effective length of the Y-axis upright rod is adjustable, thereby achieving the purpose of adjusting the height of the cross bar unit.

[0011] Furthermore, a guide hole is opened on the side wall of the fixing head. After the cross bar unit passes through the guide hole, it is locked in place with a locking screw. The locking screw is arranged on the top of the fixing head and is threadedly connected to the fixing head. After passing through the fixing head, the locking screw is tightened on the cross bar unit.

[0012] Furthermore, the X-axis unit includes an X-axis rod; the first end of the X-axis rod is connected to the clamping unit; the second end of the X-axis rod passes through the X-axis rod mounting hole at the top of the adjustment block unit, and the side wall of the adjustment block unit is provided with an X-axis vertical rod locking handle; the X-axis rod is provided with at least 5 positioning holes at equal intervals along the horizontal direction, and the X-axis vertical rod locking handle is threadedly connected to the adjustment block unit. After the X-axis vertical rod locking handle is screwed into the adjustment block unit, it extends into any one of the positioning holes to lock the X-axis rod in place, so that the effective length of the X-axis rod can be adjusted.

[0013] Furthermore, a female flange is provided at the first end of the X-axis rod, a permanent magnetic head boss is provided at the top center of the female flange surface, and at least 10 angular positioning pin holes are provided along the circumference of the female flange surface; wherein, the permanent magnetic head boss is used to achieve magnetic docking with the male flange of the clamping unit.

[0014] Furthermore, a male flange is provided on the top surface of the base plate of the clamping unit, and a permanent magnetic head recess and angle positioning pins are provided on the male flange, wherein the number of the angle positioning pins and the angle positioning pin holes are equal, and when docked, the positions of the two correspond; and the shapes of the permanent magnetic head recess and the permanent magnetic head protrusion are adapted, and when docked, the permanent magnetic head protrusion is located in the permanent magnetic head recess; the male flange and the female flange are positioned by the angle positioning pins and the positioning pin holes, and are connected by magnetic adsorption between the permanent magnetic head protrusion and the permanent magnetic head recess.

[0015] Furthermore, an anti-skid groove 3111 is provided on one side surface of the fixed finger 3109, and a V-shaped groove 3108 is provided on the other side surface of the fixed finger 3109; an anti-skid groove 3111 for increasing the clamping friction is also provided on the side surface of the movable finger 3110.

[0016] Compared with the prior art, the utility model has beneficial effects.

[0017] The utility model can replace the manual hand-held method, and the OCR handheld terminal is installed on the bracket device to complete the code scanning work, which frees up manual labor and is easy to disassemble. It can realize the free switching between manual handheld terminal code scanning and online automatic code scanning and entry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the utility model is not limited to the following descriptions.

[0019] Figure 1 It is a three-dimensional view of the application scenario of an online OCR recognition device.

[0020] Figure 2 It is an online OCR recognition device with three-dimensional vision Figure 1 .

[0021] Figure 3 It is an online OCR recognition device with three-dimensional vision Figure 2 .

[0022] Figure 4 It is an online OCR recognition device. Figure 1 .

[0023] Figure 5 The invention discloses a top view of an adjustment block unit of an online OCR recognition device.

[0024] Figure 6 It is an online OCR recognition device. Figure 2 .

[0025] Figure 7 It is a side view of the clamp unit of an online OCR recognition device.

[0026] Figure 8 It is a front view of a clamp unit fixing a finger of an online OCR recognition device.

[0027] Fig. 9 It is an online OCR recognition device X-axis unit three-dimensional view.

[0028] Fig.10 It is an online OCR recognition device Y-axis unit three-dimensional view.

[0029] In the figure, 1 is a product, 2 is a conveyor line, 3 is an identification device unit, 101 is a label, 201 is a cylindrical leg, and 202 is a square leg;

[0030] 31 is a clamp unit, 32 is an adjustment block unit, 33 is an X-axis unit, 34 is a Y-axis unit, 35 is a crossbar unit, 3101 is a bottom plate, 3102 is a permanent magnetic head concave head, 3103 is a male flange, 3104 is an angle positioning pin, 3105 is a fixed finger plug hole, 3106 is a screw support seat, 3107 is an adjustment screw, 3108 is a V-shaped mouth, 3109 is a fixed finger, 3110 is a movable finger, 3111 is an anti-slip groove, 3112 is a fixed finger plug rod, 3113 is a movable finger T-shaped guide groove, and 3114 is a stopper;

[0031] 3201 is the rectangular body, 3202 is the Y-axis pole locking handle, 3203 is the X-axis rod locking handle, 3204 is the X-axis rod mounting hole, 3205 is the Y-axis pole mounting hole, and 3206 is the conical head;

[0032] 3301 is plane 1, 3302 is vacant hole 1, 3303 is X-axis rod, 3304 is female flange, 3305 is permanent magnetic head convex head, 3306 is angle positioning pin hole;

[0033] 3401 is a fixed head, 3402 is a locking screw, 3403 is a guide hole, 3404 is a cutout, 3405 is a Y-axis vertical rod, 3406 is a positioning hole 2, and 3407 is a plane 2;

[0034] 3501 is the crossbar body, 3502 is the connecting rod, 3503 is the fixing frame, 3504 is the OCR reader, and 3505 is the fill light. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and beneficial effects of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments.

[0036] like Figure 1-10As shown, the online OCR recognition device includes: a crossbar unit 35 for fixing the OCR code reader 3504; the crossbar unit 35 is fixed to the top of the Y-axis unit 34 perpendicular thereto, and the middle part of the Y-axis unit 34 is detachably mounted on an adjustment block unit 32. An X-axis unit 33 is detachably mounted on the adjustment block unit 32, and a clamp unit 31 is mounted on the end of the X-axis unit 33. The clamp unit 31 includes a base plate 3101, a movable finger and a fixed finger fixed to the bottom surface of the base plate 3101, and the two fingers are arranged side by side for clamping and fixing on the conveyor line support leg; a T-shaped guide groove is provided on the bottom surface of the base plate 3101 running through its length direction, and a T-shaped structure that slides with the T-shaped guide groove is provided at the root of the movable finger, and the T-shaped structure is inserted into the T-shaped guide groove so that the movable finger can move back and forth along the T-shaped guide groove; a screw support seat is fixedly mounted on the end surface of one end of the base plate 3101, and a screw support seat is mounted on the screw support seat An adjusting screw 3107 is rotatably installed, and the adjusting screw can rotate freely relative to the screw support seat; the adjusting screw 3107 passes through the screw support seat and extends into the T-shaped guide groove, and is connected with the T-shaped structure thread; the adjusting screw 3107 cooperates with the T-shaped structure thread of the moving finger 3110, allowing the adjusting screw to be manually rotated to adjust the position of the moving finger to adapt to conveyor line legs 201, 202 of different sizes; the fixed finger 3109 is tightly matched with the socket of the base plate through the fixed finger plug rod 3112.

[0037] Preferably, the adjustment block unit 32 adopts a rectangular block body 3201, and the rectangular block body 3201 is provided with an X-axis rod mounting hole 3204 and a Y-axis vertical rod mounting hole 3205. The X-axis rod mounting hole 3204 and the Y-axis vertical rod mounting hole 3205 are respectively matched with the X-axis unit 33 and the Y-axis unit 34, and the relative position locking of the X-axis and the Y-axis is realized by rotating the locking handles 3202 and 3203.

[0038] Preferably, the crossbar unit 35 includes a crossbar body 3501 fixed to the top of the Y-axis unit 34, a connecting rod 3502, and a fixed frame 3503, wherein the crossbar body 3501 is connected to one end of the connecting rod 3502, and the other end of the connecting rod 3502 is fixedly connected to the fixed frame 3503, and the center lines of the crossbar body 3501, the connecting rod 3502, and the fixed frame 3503 are collinear; the OCR reader 3504 is installed in the fixed frame 3503, and a fill light 3505 is installed on the side wall of the fixed frame 3503. The fixed frame 3503 of the crossbar unit 35 can accommodate the OCR reader 3504, and the fill light is used to accurately read the barcode on the product under various lighting conditions.

[0039] Preferably, the Y-axis unit 34 includes a Y-axis vertical rod 3405 perpendicular to the cross bar body 3501, and a fixing head 3401 is provided at one end of the Y-axis vertical rod 3405 for fixing the cross bar unit 35; the other end of the Y-axis vertical rod 3405 passes through the Y-axis vertical rod mounting hole 3205 at the top of the adjustment block unit 32, and a Y-axis vertical rod locking handle 3202 is provided on one side wall of the adjustment block unit 32; the Y-axis vertical rod 3405 is provided with at least 5 positioning holes 2 3406 at equal intervals along the longitudinal direction, and the Y-axis vertical rod locking handle 3202 is threadedly connected to the adjustment block unit 32. After the Y-axis vertical rod locking handle 3202 is screwed into the adjustment block unit 32, it extends into any one of the positioning holes 2 3406 to lock the Y-axis vertical rod 3405 in position. At the same time, the Y-axis vertical rod locking handle 3202 is arranged to extend into different positioning holes 3406, so that the effective length of the Y-axis vertical rod 3405 can be adjusted, thereby achieving the purpose of adjusting the height of the cross bar unit 35.

[0040] Preferably, a guide hole 3403 is provided on the side wall of the fixed head 3401. After the crossbar unit 35, i.e., the crossbar body 3501 passes through the guide hole 3403, it is locked and positioned by a locking screw 3402. The locking screw 3402 is arranged on the top of the fixed head 3401 and is threadedly connected with the fixed head 3401. After the locking screw 3402 passes through the fixed head, it is tightened on the crossbar unit 35. The fixed head 3401 of the Y-axis vertical rod 3405 cooperates with the guide hole 3403 and the locking screw 3402 to realize the positioning and fixing of the crossbar body 3501 in the Y-axis direction.

[0041] Preferably, the X-axis unit 33 includes an X-axis rod 3303; the first end of the X-axis rod 3303 is connected to the clamp unit 31; the second end of the X-axis rod 3303 passes through the X-axis rod mounting hole 3204 at the top of the adjustment block unit 32, and the side wall of the adjustment block unit 32 is provided with an X-axis vertical rod locking handle 3203; the X-axis rod 3303 is provided with at least five positioning holes 1 3302 at equal intervals in the horizontal direction, and the X-axis vertical rod locking handle 3203 is threadedly connected with the adjustment block unit 32. After the X-axis vertical rod locking handle 3203 is screwed into the adjustment block unit 32, it extends into any one of the positioning holes 1 3302 to lock and position the X-axis rod 3303. At the same time, the X-axis vertical rod locking handle 3203 is extended into different positioning holes 1 3302, so that the effective length of the X-axis rod 3303 can be adjusted.

[0042] Preferably, a female flange 3304 is provided at the first end of the X-axis rod 3303, a permanent magnetic head boss 3305 is provided at the top center of the female flange 3304, and at least 10 angular positioning pin holes 3306 are provided along the circumference of the female flange 3304; wherein, the permanent magnetic head boss 3305 is used to achieve magnetic docking with the male flange 3103 of the clamping unit 31.

[0043] Preferably, a male flange 3103 is provided on the top surface of the base plate 3101 of the clamping unit 31, and a permanent magnetic head recess 3102 and an angle positioning pin 3104 are provided on the male flange 3103, wherein the number of the angle positioning pins 3104 and the angle positioning pin holes 3306 are equal, and when docked, the positions of the two correspond; and the shapes of the permanent magnetic head recess 3102 and the permanent magnetic head protrusion 3305 are adapted, and when docked, the permanent magnetic head protrusion 3305 is located in the permanent magnetic head recess 3102; the male flange 3103 and the female flange 3304 are positioned by the angle positioning pins 3104 and the positioning pin holes 3306, and are connected with the permanent magnetic head recess 3102 by magnetic adsorption through the permanent magnetic head protrusion 3305.

[0044] Preferably, an anti-skid groove 3111 is provided on one side surface of the fixed finger 3109, and a V-shaped groove 3108 is provided on the other side surface of the fixed finger 3109; an anti-skid groove 3111 for increasing the clamping friction is also provided on the side of the movable finger 3110.

[0045] Embodiment 1: A cutout is provided on one side of the fixed head 3401 of the Y-axis unit 34 to relieve the tension of the guide hole 3403 .

[0046] Embodiment 2: The second positioning hole 3406 is disposed on the second plane 3407 on the Y-axis vertical rod 3405, and the first positioning hole 3302 is disposed on the first plane 3301 of the X-axis rod 3303. The second plane 3407 is parallel to the first plane 3301 to ensure the adjustment accuracy in the Y-axis direction.

[0047] Embodiment 3: The X-axis rod 3303 is perpendicular to the Y-axis vertical rod 3405, and the Y-axis vertical rod 3405 is perpendicular to the connecting rod 3502, so that the adjustment of the XY axis and the horizontal length can be realized.

[0048] Installation and working process description:

[0049] When the product is transported by a conveyor line, the clamp unit is first connected to the legs of the conveyor line or other fixing mechanisms, and the clamp allows two fingers to clamp the corresponding legs of the conveyor line by adjusting the screw.

[0050] Among them, for square legs, the two straight surfaces of the fingers can be used to clamp them directly. For round legs, the fixed fingers can be pulled out from the fixed finger sockets, turned 180° so that the V-shaped mouth corresponds to the movable fingers, and the cylindrical legs can be clamped. The V-shape serves to limit the cylindrical legs.

[0051] Then, the X-axis unit is docked with the male flange through the female flange, and the corresponding relationship between the angle positioning pin and the hole is determined to achieve the rotation angle adjustment of the X-axis. The pin is docked and inserted into the hole, and the convex and concave heads of the permanent magnetic head are docked, and the axial fixation of the pin and the hole can be achieved through the mutual magnetic adsorption.

[0052] Adjust the position of the adjustment block unit relative to the X-axis unit and lock the corresponding locking handle.

[0053] Insert the Y-axis unit into the corresponding hole of the adjustment block unit, and lock the corresponding locking handle (the front section of the locking handle is provided with a conical head which can be docked and locked with the locating hole on the corresponding rod. The plane is provided on the corresponding rod mainly to make the locating hole a circular hole contour on the plane (if there is no plane, the contour of the hole on the rod is an elliptical structure, which cannot be well docked with the conical head), so as to facilitate the complete matching of the conical pin with the circular hole contour, which is conducive to the stable fixation of the corresponding rod).

[0054] Then insert the crossbar body into the guide hole, adjust the angle and position of the crossbar body, and then place the OCR handheld terminal into the fixed frame so that the OCR handheld terminal corresponds to the barcode position on the product, and can realize real-time reading of the product barcode and information upload.

[0055] When reading codes at night or in dimly lit locations, you can turn on the corresponding fill light to help OCR read the information successfully.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. Therefore, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope defined by the claims of the present invention.

Claims

1. An online OCR recognition device, characterized in that: The invention comprises a crossbar unit (35) for fixing an OCR code reader (3504); the crossbar unit (35) is characterized in that the crossbar unit (35) is fixed to the top of a Y-axis unit (34) perpendicular thereto, and the middle of the Y-axis unit (34) is detachably mounted on an adjustment block unit (32); The adjustment block unit (32) is detachably mounted with an X-axis unit (33), and the end of the X-axis unit (33) is mounted with a clamp unit (31); The clamp unit (31) includes a base plate (3101), a movable finger (3110) fixed to the bottom surface of the base plate (3101), and a fixed finger (3109), the two fingers are arranged in parallel; a T-shaped guide groove running through the length direction of the bottom surface of the base plate (3101) is provided, and a T-shaped structure that slides with the T-shaped guide groove is provided at the root of the movable finger (3110), and the T-shaped structure is inserted into the T-shaped guide groove and can move back and forth along the T-shaped guide groove; a screw support seat is fixedly installed on one end surface of the base plate (3101), and an adjusting screw (3107) is rotatably installed on the screw support seat, and the adjusting screw (3107) passes through the screw support seat and then extends into the T-shaped guide groove and is threadedly connected with the T-shaped structure; the fixed finger (3109) is tightly matched with the socket of the base plate through the fixed finger plug rod (3112).

2. The online OCR recognition device according to claim 1, characterized in that: The adjustment block unit (32) adopts a rectangular block body (3201), and the rectangular block body (3201) is provided with an X-axis rod mounting hole (3204) and a Y-axis vertical rod mounting hole (3205).

3. The online OCR recognition device according to claim 1, characterized in that: The crossbar unit (35) comprises a crossbar body (3501) fixed to the top of the Y-axis unit (34), a connecting rod (3502), and a fixed frame (3503), wherein the crossbar body (3501) is connected to one end of the connecting rod (3502), and the other end of the connecting rod (3502) is fixedly connected to the fixed frame (3503), and the center lines of the crossbar body (3501), the connecting rod (3502), and the fixed frame (3503) are collinear; an OCR code reader (3504) is installed in the fixed frame (3503), and a fill light (3505) is installed on the side wall of the fixed frame (3503).

4. The online OCR recognition device according to claim 3, characterized in that: The Y-axis unit (34) comprises a Y-axis vertical rod (3405) perpendicular to the crossbar body (3501), one end of the Y-axis vertical rod (3405) is provided with a fixing head (3401) for fixing the crossbar unit (35); the other end of the Y-axis vertical rod (3405) passes through the Y-axis vertical rod mounting hole (3205) at the top of the adjustment block unit (32), and a Y-axis vertical rod locking handle (3202) is provided on one side wall of the adjustment block unit (32); the Y-axis vertical rod (3405) is provided with at least 5 positioning holes (3406) at equal intervals along the longitudinal direction, the Y-axis vertical rod locking handle (3202) is threadedly connected to the adjustment block unit (32), and after the Y-axis vertical rod locking handle (3202) is screwed into the adjustment block unit (32), it extends into any one of the positioning holes (3406) to lock and position the Y-axis vertical rod (3405).

5. The online OCR recognition device according to claim 4, characterized in that: A guide hole (3403) is provided on the side wall of the fixing head (3401). After the crossbar unit (35) passes through the guide hole (3403), it is locked and positioned by a locking screw (3402). The locking screw (3402) is arranged on the top of the fixing head (3401) and is threadedly connected to the fixing head (3401). After passing through the fixing head, the locking screw (3402) is tightened on the crossbar unit (35).

6. The online OCR recognition device according to claim 2, characterized in that: The X-axis unit (33) comprises an X-axis rod (3303); a first end of the X-axis rod (3303) is connected to the clamp unit (31); a second end of the X-axis rod (3303) passes through an X-axis rod mounting hole (3204) at the top of the adjustment block unit (32); a side wall of the adjustment block unit (32) is provided with an X-axis vertical rod locking handle (3203); the X-axis rod (3303) is provided with at least five positioning holes (3302) at equal intervals in the horizontal direction; the X-axis vertical rod locking handle (3203) is threadedly connected to the adjustment block unit (32); after the X-axis vertical rod locking handle (3203) is screwed into the adjustment block unit (32), it extends into any one of the positioning holes (3302) to lock and position the X-axis rod (3303).

7. The online OCR recognition device according to claim 6, characterized in that: A female flange (3304) is provided at the first end of the X-axis rod (3303), a permanent magnetic head boss (3305) is provided at the top center of the female flange (3304), and at least 10 angular positioning pin holes (3306) are provided along the circumference of the female flange (3304); wherein the permanent magnetic head boss (3305) is used to achieve magnetic docking with the male flange (3103) of the clamp unit (31).

8. The online OCR recognition device according to claim 7, characterized in that: The top surface of the bottom plate (3101) of the clamp unit (31) is provided with a male flange (3103), and the male flange (3103) is provided with a permanent magnetic head concave head (3102) and an angle positioning pin (3104), wherein the number of the angle positioning pins (3104) and the angle positioning pin holes (3306) are equal, and when docked, the positions of the two correspond; and the shapes of the permanent magnetic head concave head (3102) and the permanent magnetic head convex head (3305) are adapted, and when docked, the permanent magnetic head convex head (3305) is located in the permanent magnetic head concave head (3102); the male flange (3103) and the female flange (3304) are positioned by the angle positioning pin (3104) and the positioning pin holes (3306), and are connected by magnetic attraction between the permanent magnetic head convex head (3305) and the permanent magnetic head concave head (3102).

9. The online OCR recognition device according to claim 1, characterized in that: The fixed finger (3109) is provided with an anti-skid groove (3111) on one side surface, and a V-shaped opening (3108) is provided on the other side surface of the fixed finger (3109); the side surface of the movable finger (3110) is also provided with an anti-skid groove (3111) for increasing the clamping friction force.

Images