CN211955945U

CN211955945U - Polaroid rotating mechanism and detection equipment

Info

Publication number: CN211955945U
Application number: CN202020587138.7U
Authority: CN
Inventors: 梁伟明
Original assignee: Shenzhen Dior Automation Equipment Co ltd
Current assignee: Shenzhen Dior Automation Equipment Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-11-17
Anticipated expiration: 2030-04-20

Abstract

The application discloses a polaroid rotating mechanism and detection equipment, wherein the polaroid rotating mechanism is fixedly arranged on a rack of the detection equipment and comprises a base, a driving wheel arranged on the base, a stepping motor connected with the driving wheel and driving the stepping motor to rotate, a synchronous belt arranged opposite to the driving wheel, a driven wheel positioned on one side of the base far away from the stepping motor and a synchronous belt connected with the driving wheel and the driven wheel; the polaroid is installed on the driven wheel. Therefore, the polaroid can rotate automatically, the low detection efficiency caused by manual debugging is reduced, and the detection quality is improved.

Description

Polaroid rotating mechanism and detection equipment

Technical Field

The application relates to the technical field of optical testing devices, in particular to an automatic detection mechanism for liquid crystal glass AOI.

Background

In the production process of the liquid crystal display screen, various detections are needed to be carried out on products so as to find out bad products in time and repair or reject the bad products in time, so that the product quality is ensured and the first pass rate is improved. The detection of the product is an important component for ensuring the product quality and the enterprise competitiveness, and the detection mode of the liquid crystal glass in the current market is mainly AOI automatic nondestructive detection. In the conventional design, when the detection camera detects the liquid crystal glass, an image can be normally displayed only when the polarizer and the liquid crystal glass are at a specific angle; because the liquid crystal glass has some deviation at each placing position, the angle between the polarizer and the glass needs to be adjusted; therefore, the detection camera can acquire different images of the liquid crystal screen, and then judge whether the liquid crystal glass has defects or not through the AOI program.

In the above steps, the polarizer installed below the camera is usually in a fixed installation manner, and then a worker needs to perform manual fine adjustment on the polarizer many times, which is a very high challenge to the design of the tooling fixture. Because the deviation of the position and the angle of the glass put in each time can influence the detection result to cause misjudgment, and because of the relation of the product size, the polaroid needs to be readjusted to adapt to the current production requirement every time the line is changed.

Disclosure of Invention

In order to solve the technical problem, the application provides a polaroid rotary mechanism and detection equipment to the position of accurate adjustment polaroid reduces artifical manual debugging, improves detection quality and efficiency.

The application provides a polaroid rotary mechanism, in this structure, has replaced the mounting means of original liquid crystal glazing top polaroid, but changes the mounting means of original fixed into the mode of 360 degrees rotations and install fixedly, realizes 360 degrees rotations of full field of vision polaroid, makes the polaroid automatically regulated and liquid crystal glazing's angle.

This mechanism includes step motor, action wheel, hold-in range, follows the driving wheel, bearing retainer ring and colorless transparent organic glass, and the action wheel is installed on step motor, is located the bearing retainer ring top from the driving wheel, and the bearing retainer ring is located colorless transparent organic glass top, passes through the bearing connection from driving wheel, bearing retainer ring and colorless transparent organic glass, and the action wheel passes through the hold-in range with following the driving wheel and connects.

As an improvement of this application, bearing structure is the structure of forming by a hollow synchronizing wheel that has the bearing installation position and bearing, and synchronizing wheel one end has mounting flange for install bearing retainer ring and colorless transparent organic glass. The colorless organic glass is used for adhering the polarizer to realize the automatic rotation adjustment of the polarizer to the angle correspondingly matched with the liquid crystal glass.

As an improvement of this application, this mechanism still includes the base, protection panel beating, hold-in range tight mechanism that rises, photoelectric sensing piece, photoelectric switch and erection joint piece, and the protection panel beating is installed on the base, and step motor installs on the base, and hold-in range tight mechanism that rises is located the action wheel and from between the driving wheel, and hold-in range tight mechanism that rises is connected with the hold-in range. The driving wheel is provided with a photoelectric sensing piece, and the protective metal plate is provided with a photoelectric switch. The mounting connection block is connected to the frame portion for connecting the frame to other equipment.

Contrast prior art, replace the mode of original fixed mounting polaroid with rotatable and ascending and descending's automatic mode, adopt above-mentioned technical scheme after, the beneficial effect of this application is:

the method effectively solves the problems of a fixed structure, reduces debugging difficulty in the production debugging process, avoids repeated debugging caused by wire replacement, and improves the overall automation degree of the equipment; the detection accuracy is improved, the misjudgment of the product is reduced, and the product quality is guaranteed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is an exemplary detection device of the present application;

FIG. 2 is a schematic structural diagram of a polarizer rotation mechanism according to the present application;

FIG. 3 is an exploded view of a polarizer rotation mechanism according to the present application;

in the figure: 1. a base; 2. a stepping motor; 3. a driving wheel; 4. a synchronous belt; 5. a driven wheel; 6. a photoelectric sensing sheet; 7. a photoelectric switch; 8. a notch; 9. a synchronous belt tensioning mechanism; 10. A bearing; 11. a bearing retainer ring; 12. colorless transparent organic glass; 13. a protective metal plate; 14. Installing a connecting block; 15. a detection device; 16. detecting a camera; 17. a polarizer; 18. liquid crystal glass; 19. a light source.

Detailed Description

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present application. This application may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, it is to be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The present application is further described below with reference to the accompanying drawings and examples.

Fig. 1 shows an exemplary inspection apparatus 15, which is an automatic non-destructive inspection method for liquid crystal glass AOI in the market today, and generally includes placing a polarizer 17 on a light source 19, placing a liquid crystal glass 18 to be inspected in the middle, placing a polarizer 17 on the upper side, and finally installing an inspection camera 16 on the polarizer 17, wherein the polarizer 17 rotates to a specific angle with the liquid crystal glass 18 to display an image, the inspection camera collects different images of the liquid crystal screen, the light from the light source 19 enters the camera after passing through the polarizer 17 and the liquid crystal glass 18, and then the AOI program determines whether the liquid crystal glass 18 has defects.

As shown in fig. 2, the application discloses a polarizer rotating mechanism, which is mounted and fixed on a frame, and comprises a base 1, a driving wheel 3 mounted on the base 1, a stepping motor 2 connected with the driving wheel 3 and driving the driving wheel to rotate, and a driven wheel 5 arranged on the base 3 opposite to the driving wheel 3 and far away from one side of the stepping motor 2; a synchronous belt 4 connecting the driving wheel 4 and the driven wheel 5; a polarizer 17 is mounted on the driven wheel 5.

Base 1 is the infrastructure of whole mechanism, and action wheel 3 is installed at step motor 2 epaxially, for 3 rotations power that provide of drive action wheel, action wheel 3 with from driving wheel 5 through endless synchronous belt 4 be connected, when making action wheel 3 rotatory, drive from driving wheel 5 rotation to be located the polaroid 17 from driving wheel 5 department and also realize rotatoryly, camera on the check out test set gathers the light source through the polaroid after the rotation, carries out the detection to liquid crystal glazing. The belt wheel mechanism adopts an engagement type, the friction type belt wheel mechanism has the defects of slippage and inaccuracy during overload, and the engagement type belt wheel mechanism solves the problems.

The stepping motor 2 is an open-loop control element for converting an electric pulse signal into angular displacement or linear displacement, under the condition of non-overload, the rotating speed and the stopping position of the motor only depend on the frequency and the pulse number of the pulse signal, and are not influenced by load change. The angular displacement can be controlled by controlling the number of pulses, so that the aim of accurate positioning is fulfilled; meanwhile, the rotating speed and the rotating acceleration of the motor can be controlled by controlling the pulse frequency, so that the aim of speed regulation is fulfilled.

Specifically, the driven wheel 5 comprises a bearing 10 and a bearing retainer ring 11, and the bearing retainer ring is used for fixing the driven wheel 5 on the base; the colorless transparent organic glass 12 is positioned below the bearing retainer ring 11 and attached to the driven wheel 5; the polarizer 17 is attached to the lower surface of the colorless transparent glass 12.

The bearing 10 and the bearing retainer ring 11 are arranged to better fix the driven wheel 5, so that the driven wheel 5 cannot be separated from the base 1 due to external force except that the driving wheel 3 drives the annular synchronous belt 4 to rotate; because the driven wheel 5 is positioned below the detection camera 16, a polarizer 17 needs to be attached; the driven wheel 5 is a hollow wheel, and the colorless transparent organic glass 12 is arranged in consideration of the difficulty in attaching the shape and the characteristics of the polarizer, the polarizer 17 is attached to the colorless organic glass 12, and the colorless transparent organic glass 12 is attached to the hollow driven wheel 5, so that the polarizer 17 can rotate along with the driven wheel 5; or the detection camera 15 can acquire the image formed by the transparent polarizer 17 and the transparent liquid crystal glass 18 at a specific angle through the colorless transparent organic glass 12; the polarizer 17 can automatically rotate, the detection camera can carry out AOI (Automated Optical Inspection) automatic nondestructive detection without manual arrangement and debugging, and the detection efficiency is greatly improved.

Further, manual debugging is easy to generate errors relative to automatic program debugging, and even if the polarizer is subjected to manual fine tuning, the specific angle between the polarizer and the glass cannot be accurately reached, so that an image to be detected is provided for the detection camera 15; the polarizer 17 can be automatically rotated and the inspection quality can be greatly improved.

In this embodiment, the polaroid 17 can be installed on the 12 inner walls of colorless transparent organic glass, also can install on 12 outer walls of colorless transparent organic glass, can also be with in the middle of the double-deck colorless transparent organic glass 12 of embedding in the polaroid.

This embodiment is optional, and hold-in range 4 includes hold-in range tensioning mechanism 9 for adjust hold-in range 4's elasticity.

According to the friction transmission principle of the belt, the synchronous belt 4 can normally work only after being pre-tensioned; after running for a certain time, the synchronous belt 4 is loosened, and in order to ensure the transmission capacity of the synchronous belt 4, the synchronous belt must be tightened again to normally work.

In an optional embodiment, the base 1 further includes a protective metal plate 13, which is disposed around and perpendicular to the base 1; the drive pulley 3 includes: the photoelectric sensing piece 6 is positioned above the driving wheel 3, and the photoelectric switch 7 is arranged corresponding to the photoelectric sensing piece 6 and is arranged on the protective metal plate 13; the photoelectric sensing piece comprises a notch, and the photoelectric switch senses the photoelectric sensing piece through the notch and records the rotating number and the rotating angle of the driving wheel. The photoelectric switch 7 senses the photoelectric sensing piece 6 through the notch 8 and records the number of rotation turns and the angle of the driving wheel 3. The photoelectric sensing sheet 6 is a sensor using a photoelectric element as a detection element, and the photoelectric sensing sheet 6 first converts a measured change into a change of an optical signal and then further converts the optical signal into an electric signal by means of the photoelectric element. The photoelectric sensor generally consists of three parts, namely a light source, an optical path and a photoelectric element.

The photoelectric switch 7 is an active photoelectric detection system type electronic switch using pulse modulation, and uses a cold light source such as infrared light, red light, green light, and blue light, and can rapidly control the states and actions of various objects without contact and damage.

The protection panel beating 13 is installed on base 1 for prevent that the foreign matter from getting into slewing mechanism inside.

The stepping motor 2 is used as a position control function, and the functions of origin return, end stop, position control, limit position protection and the like of the stepping motor 2 are controlled by a controller. For example, the stepping motor 2 is operated in an open loop, that is, the stepping motor 2 may step out during operation, for example, when a large resistance is encountered, and after a power failure, the stepping motor 2 has no locking torque, and the power position is changed when the stepping motor is turned on again, so that the system can calibrate a zero position when necessary.

Therefore, when the polarizer rotating mechanism operates, namely the stepping motor 2 drives the driving wheel 3, the photoelectric sensing piece 6 and the photoelectric switch 7 need to pass through the notch 8, so that the program records the number of turns and the angle of the rotation of the driving wheel 3, the glass to be detected is conveniently placed next time, and when the polarizer rotating mechanism operates again, the initial rotation position of the driving wheel 3 is at the same position.

More specifically, when the capstan 3 rotates, it is assumed that a low level signal is fed back when light is blocked by the photo-electric sensor sheet (i.e., there is no notch); when the light is not blocked by the photoelectric sensing piece (namely, at the notch), a high level signal is fed back. The step motor is programmed according to high and low levels, a fan-shaped coordinate system which takes a motor shaft as a circle center is established by taking the position of the gap of the photoelectric sensing piece as a coordinate origin, after the motor is started, the position of the gap of the photoelectric sensing piece can be judged according to the rotation angle of the motor, and indirectly, the rotation angle of the polaroid can also be known. When the equipment resets, step motor 2 stops in jagged position, the debugging when convenient next operation. The steps of manual debugging are reduced, the detection efficiency is improved, and the labor cost is reduced.

In an optional embodiment, the polarizer rotating mechanism further includes a mounting connection block 14, configured to mount the polarizer rotating mechanism on the frame. The polarizer rotating mechanism is particularly arranged on a connecting piece on a rack of the whole detection equipment, and can also be an installation connecting piece on other equipment which needs to be automatically rotated and adjusted to facilitate detection or the like.

As another embodiment of this application, still disclose a check out test set, include any one polaroid rotary mechanism above.

It should be noted that, the limitations of various shapes and numbers related in the present disclosure are not considered to be limitations on the implementation of the specific embodiments, and the technical solution of the present disclosure can be widely applied to various display panels and other inspection processes requiring polarizer alignment debugging, and as long as the present disclosure can be implemented, the present disclosure should be considered as belonging to the protection scope of the present disclosure.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims

1. The utility model provides a polaroid rotary mechanism, the installation is fixed in the frame, its characterized in that includes:

a base;

the driving wheel is arranged on the base;

the stepping motor is connected with the driving wheel and drives the driving wheel to rotate;

the driven wheel is arranged opposite to the driving wheel and is positioned on one side, far away from the stepping motor, of the base;

the synchronous belt is connected with the driving wheel and the driven wheel;

the polaroid is installed on the driven wheel.

2. The polarizer rotating mechanism according to claim 1, wherein the driven wheel comprises:

the bearing and the bearing retainer ring are used for fixing the driven wheel on the base;

the colorless transparent organic glass is positioned below the bearing retainer ring and is arranged on the driven wheel;

wherein, the polaroid is attached to the surface of the colorless transparent glass.

3. The polarizer rotating mechanism of claim 1, wherein the synchronous belt comprises a synchronous belt tensioning mechanism for adjusting tightness of the synchronous belt.

4. The polarizer rotating mechanism of claim 1, wherein the base further comprises

The protective metal plate surrounds and is perpendicular to the base;

the action wheel includes:

the photoelectric sensing piece is positioned above the driving wheel and comprises a notch;

the photoelectric switch is arranged corresponding to the notch and is installed on the protective metal plate;

the photoelectric switch senses the photoelectric sensing piece through the notch and records the rotation number and the angle of the driving wheel.

5. The polarizer rotating mechanism of claim 1, further comprising a mounting connection block for mounting the polarizer rotating mechanism on the frame.

6. The polarizer rotating mechanism according to claim 1, wherein the driving wheel and the driven wheel are hollow synchronous wheels.

7. An inspection apparatus comprising the polarizer rotating mechanism according to any one of claims 1 to 6.