Visual inspection amplification device

Abstract

The utility model provides a visual inspection amplification device. The visual inspection amplification device comprises a lens assembly and two mounting racks connected with two ends of the lens assembly, the lens assembly comprises a magnifying lens of a rectangular structure and a lens frame connected with the edge of the magnifying lens, the mounting frame comprises a positioning mounting block and a movable connecting block, a positioning mounting part is formed at the upper end of the positioning mounting block, and a movable connecting part is formed at the lower end of the positioning mounting block; the upper end of the movable connecting block is hinged to the movable connecting part, and the lower end of the movable connecting block is fixedly connected with the lens frame. According to the utility model, by adjusting the hinge included angle between the movable connecting block and the positioning mounting block, the lens assembly connected with the movable connecting block can face the irradiation imaging area of the stroboscope, and the imaging area is observed through the magnifying lens, so that the details of characters or patterns of printed matters can be more intuitively observed, and hidden printing problems can be conveniently screened; and printing faults can be eliminated in time, and the printing qualification rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of printing and processing, and particularly relates to a visual inspection magnifying device. Background Art

[0002] Generally, an inspection station is arranged between the web printing section and the winding section of a printing press. The inspection station uses a stroboscope to adjust the stroboscopic light according to the printing speed of the printed web, so that the patterns on the printed web appear static, facilitating workers to inspect the printing effect of the web and ensuring the printing quality.

[0003] In practical applications, the characters and patterns on some printed products are small, and it is difficult to detect subtle printing problems by visual inspection with the naked eye. Moreover, the winding speed of the printing press is relatively fast, which easily leads to missed inspections by workers, reducing the qualified rate of printed products and increasing the production cost. Some existing technologies use electronic devices for image recognition. For example, a patent document with the application number CN201520051714.5 discloses a printed product quality inspection device, which is provided with a magnifying glass and an image collector above the printed product conveying mechanism. The image collector replaces manual quality inspection. Although this method can improve the quality inspection accuracy to a certain extent, it requires additional background equipment for pattern analysis, with a relatively high equipment cost. Moreover, different algorithms are required for the recognition and analysis of printed products with different characters and patterns, presenting certain technical difficulties and being difficult to be widely applied. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a visual inspection magnifying device, which can be used in cooperation with a stroboscope to visually magnify the area irradiated by the stroboscope, facilitating quality inspectors to clearly observe the details of characters and patterns on printed products, improving the qualified rate of printed products, and having a simple device structure and a relatively low application threshold.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions:

[0006] A visual inspection magnifying device includes a lens assembly and two mounting brackets connected to both ends of the lens assembly; the lens assembly includes a magnifying lens with a rectangular structure and a lens frame connected to the edge of the magnifying lens, the mounting bracket includes a positioning mounting block and a movable connection block, the upper end of the positioning mounting block forms a positioning mounting portion, the lower end forms a movable connection portion, the upper end of the movable connection block is hinged to the movable connection portion, and the lower end is fixedly connected to the lens frame.

[0007] When in use, the visual inspection magnifying device provided by the present utility model is fixedly connected to a frame or a stroboscope through a positioning and mounting portion at the upper end of a mounting block. By adjusting the hinge angle between a movable connection block and a positioning and mounting block, the lens assembly connected to the movable connection block faces the area irradiated and imaged by the stroboscope. By observing the imaging area through a magnifying lens, the text or pattern details of a printed matter can be observed more intuitively, facilitating the screening of relatively concealed printing problems, contributing to promptly eliminating printing faults, improving the printing qualification rate, reducing production costs, and at the same time reducing the work difficulty and fatigue accumulation of quality inspection personnel.

[0008] Further, the movable connection portion has a hinge shaft hole, the upper end of the movable connection block forms a hinge shaft head that is movably matched with the hinge shaft hole, and a first locking nut is provided at the end of the hinge shaft head.

[0009] Further, the lens frame includes an upper shaft rod and a lower shaft rod respectively located on the upper and lower sides of the magnifying lens and two mounting plates located at both ends of the magnifying lens, and the ends of the upper shaft rod and the lower shaft rod are connected to the mounting plates.

[0010] Further, the mounting plate includes a positioning shaft hole and a guiding shaft hole; the positioning shaft hole is a circular hole, the end of the lower shaft rod is connected to the positioning shaft hole in a mating manner and the lower shaft rod can rotate around the shaft; the guiding shaft hole is an arc-shaped extending strip hole, the end of the upper shaft rod is connected to the guiding shaft hole in a mating manner and the upper shaft rod can slide along the arc of the guiding shaft hole.

[0011] Through the settings of the positioning shaft hole and the guiding shaft hole, the upper side of the magnifying lens can move along the arc of the guiding shaft hole, changing the angle of the magnifying lens, facilitating the observation of the imaging area through the magnifying lens. Combining with the hinge structure between the movable connection block and the positioning and mounting block, the present utility model greatly improves the adjustment range of the angle and position of the magnifying lens through two-step adjustment, so as to adapt to the operating habits of different quality inspection personnel.

[0012] Further, the upper shaft rod and the lower shaft rod are detachably connected to the mounting plate.

[0013] Further, the upper and lower sides of the magnifying lens are respectively fixedly connected to the upper shaft rod and the lower shaft rod, and there is a gap between both ends of the magnifying lens and the mounting plate.

[0014] Further, a second locking nut is provided at the end of the upper shaft rod.

[0015] Further, the width of the mounting plate gradually decreases from the upper end to the lower end, the positioning shaft hole is arranged near the lower end of the mounting plate, and the guiding shaft hole is arranged near the upper end of the mounting plate.

[0016] When the mounting plate moves through the hinge structure of the movable connection block and the positioning mounting block, the lower end will swing in the direction of approaching or moving away from the printed matter. If the mounting plate is a rectangular structure, the end corners of the lower end may come into contact with the printed matter. However, a mounting plate with an inverted triangular structure whose width gradually decreases from the upper end to the lower end can largely avoid this problem, making the angle adjustment of the lens assembly more arbitrary.

[0017] In summary, the application of the present utility model can achieve the following beneficial effects:

[0018] 1. By adjusting the hinge angle between the movable connection block and the positioning mounting block, the lens assembly connected to the movable connection block can face the area irradiated by the stroboscope for imaging. By observing the imaging area through the magnifying lens, the details of the text or pattern on the printed matter can be observed more intuitively, which is convenient for screening relatively hidden printing problems, helps to promptly eliminate printing faults, improve the printing qualification rate, reduce production costs, and at the same time reduce the work difficulty and fatigue accumulation of quality inspection personnel.

[0019] 2. The structure of the present utility model is simple and easy to use, the device cost is relatively low, and the application threshold is not high, which is conducive to popularization and application.

[0020] 3. In some embodiments, the magnifying lens can rotate relative to the mounting plate, and by adjusting in two steps, the adjustment range of the angle and position of the magnifying lens is greatly improved, so as to adapt to the operating habits of different quality inspection personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a visual inspection magnifying device in one embodiment;

[0022] Figure 2 is a schematic structural diagram of a visual inspection magnifying device in another embodiment;

[0023] Figure 3 is a schematic installation structure diagram of a visual inspection magnifying device in one embodiment;

[0024] In the figure, 1 - lens assembly, 11 - magnifying lens, 12 - lens frame, 121 - upper shaft rod, 1211 - second locking nut, 122 - lower shaft rod, 123 - mounting plate, 1231 - positioning shaft hole, 1232 - guiding shaft hole, 2 - mounting bracket, 21 - positioning mounting block, 211 - positioning mounting part, 212 - movable connection part, 2121 - hinge shaft hole, 22 - movable connection block, 221 - shaft head, 222 - first locking nut, 3 - stroboscope, 31 - mounting base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model. Embodiment

[0026] Referring to Figure 1 , an embodiment of the first aspect of the present utility model provides a visual inspection magnifying device, which includes a lens assembly 1 and a mounting bracket 2; the lens assembly 1 includes a magnifying lens 11 with a rectangular structure and a lens frame 12 connected to the edge of the magnifying lens; the mounting bracket 2 includes a positioning mounting block 21 and a movable connection block 22. The upper end of the positioning mounting block 21 forms a positioning mounting portion 211. Through the positioning mounting block, it can be fixedly connected to the frame or stroboscope at the inspection station through the positioning mounting portion to realize the installation of the visual inspection magnifying device. The lower end of the positioning mounting block forms a movable connection portion 212. The upper end of the movable connection block 22 is hinged to the movable connection portion, so that the movable connection block can rotate relative to the positioning mounting block. The lower end of the movable connection block is fixedly connected to the lens frame. When the movable connection block rotates, it can adjust the angle of the lens assembly in the vertical direction to adapt to different observation needs. More specifically, the movable connection portion 212 is provided with a hinge shaft hole 2121, and the upper end of the movable connection block is provided with a shaft head 221. The shaft head is movably matched with the hinge shaft hole, and the end of the shaft head is sleeved with a first locking nut 222. By rotating the first locking nut, the positioning mounting block and the movable connection block can be relatively fixed, so as to keep the angle of the lens assembly.

[0027] The usage method of the present utility model is as follows: First, install the visual inspection magnifying device to the inspection station through the positioning mounting portion, turn on the stroboscope at the inspection station, determine the irradiation imaging area of the stroboscope, then loosen the first locking nut 222, adjust the position and angle of the lens assembly so that it faces the irradiation imaging area, and then tighten the first locking nut to keep the lens assembly in the set position and angle. Then, the magnified text or pattern on the printed matter can be observed through the magnifying lens to screen for printing problems.

[0028] Figure 2The structural schematic diagram of the visual inspection magnifying device in another embodiment is shown. The lens frame of the lens assembly includes an upper shaft rod 121 and a lower shaft rod 122 respectively arranged on the upper and lower sides of the magnifying lens 11 and two mounting plates 123 arranged at both ends of the magnifying lens. The ends of the upper shaft rod and the lower shaft rod are connected to the mounting plates. More specifically, the mounting plates are provided with a positioning shaft hole 1231 and a guiding shaft hole 1232. The positioning shaft hole is located near the lower end of the mounting plate, and the guiding shaft hole is located near the upper end of the mounting plate. The positioning shaft hole is a round hole. The end of the lower shaft rod is matched with the positioning shaft hole and the lower shaft rod can rotate around the axis. The guiding shaft hole is an arc-shaped elongated hole. The end of the upper shaft rod is matched with the guiding shaft hole and the upper shaft rod can slide along the arc of the guiding shaft hole. A second locking nut 1211 is sleeved on one end of the upper shaft hole. In this embodiment, the position and angle adjustment range of the magnifying lens are further improved. When the second locking nut is loosened, the magnifying lens can swing around the lower shaft rod, so as to adjust the position and angle of the magnifying lens. After adjusting to the appropriate position and angle, tightening the second locking nut can fix the magnifying lens relative to the mounting plate. In this embodiment, the hinged structure of the movable connection block 22 and the positioning and mounting block 21 enables the lower end of the lens assembly to swing, while the matching structure of the guiding shaft hole and the upper shaft rod enables the upper end of the magnifying glass to swing. After the two are combined, the position and angle adjustment range of the magnifying lens is greatly improved, further optimizing the use experience of the quality inspection personnel. In this embodiment, the upper and lower sides of the magnifying lens are fixedly connected to the upper shaft rod and the lower shaft rod, and there is a gap between both ends of the magnifying lens and the mounting plates to prevent the magnifying lens from rubbing against the mounting plates. Further, in this embodiment, the mounting plates form a structure of an approximately inverted triangle with the width gradually decreasing from the upper end to the lower end, preventing the mounting plates from contacting the printed matter when the lower end of the lens assembly swings, making the angle adjustment more arbitrary.

[0029] Figure 3 A mounting method of the present invention is shown. Specifically, a stroboscope 3 is provided at the inspection station. Mounting bases 31 are arranged at both ends of the stroboscope. The positioning and mounting part at the upper end of the positioning and mounting block can be fixedly connected to the mounting base to realize the installation of the device. In some other embodiments, the positioning and mounting part can also be connected to a frame with mounting sites.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An inspection magnification device, characterized in that: It includes a lens assembly and two mounting brackets connected to both ends of the lens assembly; the lens assembly includes an enlarged lens with a rectangular structure and a lens frame connected to the edge of the enlarged lens, the mounting bracket includes a positioning mounting block and a movable connection block, the upper end of the positioning mounting block forms a positioning mounting portion, and the lower end forms a movable connection portion, the upper end of the movable connection block is hinged to the movable connection portion, and the lower end is fixedly connected to the lens frame.

2. The visual inspection magnification device according to claim 1, characterized in that: The movable connection portion has a hinge shaft hole, the upper end of the movable connection block forms a hinge shaft head that is movably matched with the hinge shaft hole, and a first locking nut is provided at the end of the hinge shaft head.

3. The visual inspection magnifying device according to claim 1, characterized in that: The lens frame includes an upper shaft rod and a lower shaft rod respectively located on the upper and lower sides of the enlarged lens and two mounting plates located at both ends of the enlarged lens, and the ends of the upper shaft rod and the lower shaft rod are connected to the mounting plates.

4. The visual inspection magnifying device according to claim 3, characterized in that: The mounting plate includes a positioning shaft hole and a guiding shaft hole; the positioning shaft hole is a circular hole, the end of the lower shaft rod is connected in cooperation with the positioning shaft hole and the lower shaft rod can rotate around the axis; the guiding shaft hole is an arc-shaped elongated hole, the end of the upper shaft rod is connected in cooperation with the guiding shaft hole and the upper shaft rod can slide along the arc of the guiding shaft hole.

5. The visual inspection magnifying device according to claim 3, characterized in that: The upper shaft rod and the lower shaft rod are detachably connected to the mounting plate.

6. The visual inspection magnifying device according to claim 4, wherein: The upper and lower sides of the enlarged lens are respectively fixedly connected to the upper shaft rod and the lower shaft rod, and there is a gap between both ends of the enlarged lens and the mounting plate.

7. The visual inspection magnifying device according to claim 4, wherein: A second locking nut is provided at the end of the upper shaft rod.

8. The visual inspection magnifying device according to claim 4, wherein: The width of the mounting plate gradually decreases from the upper end to the lower end, the positioning shaft hole is arranged near the lower end of the mounting plate, and the guiding shaft hole is arranged near the upper end of the mounting plate.

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