CN106597706B - Automatic lighting fixture for liquid crystal screen - Google Patents
Automatic lighting fixture for liquid crystal screen Download PDFInfo
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- CN106597706B CN106597706B CN201611207655.1A CN201611207655A CN106597706B CN 106597706 B CN106597706 B CN 106597706B CN 201611207655 A CN201611207655 A CN 201611207655A CN 106597706 B CN106597706 B CN 106597706B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
Abstract
The invention provides an automatic lighting fixture for a liquid crystal display, which is characterized in that a liquid crystal display and FPC golden fingers are accurately placed in positioning grooves and a probe guide device through a CCD (charge coupled device) vision system and a calibration square groove; the self-locking of the clamping of the lighting fixture is realized by controlling the movement of the clamping block in the vertical direction and the movement of the sliding locking block in the horizontal direction, the pressing device presses the probe and the FPC golden finger together, and the liquid crystal screen is lighted after the probe is electrified. The tool after auto-lock just can accomplish the unblock under the horizontal migration condition of slip locking piece, and this can avoid the tool to lead to FPC golden finger and probe contact failure, unblock even because of the vibration in handling to guarantee reliability, the stability of auto-lock. The calibration square groove is directly machined on the probe guide block of the jig, multi-stage assembly errors are avoided, interchangeability is realized among the jigs, and therefore the CCD vision system only needs to calibrate any jig once and only needs to replace jigs with corresponding sizes according to different products, and the equipment production changing time is greatly shortened.
Description
Technical Field
The invention relates to the technical field of liquid crystal display detection, in particular to an automatic lighting fixture for a liquid crystal display.
Background
After the liquid crystal screen is processed through a plurality of procedures, lighting detection is needed to determine whether the processed liquid crystal screen has quality defects. The specific process of the liquid crystal display lighting detection is as follows: the finished liquid crystal display is placed on the liquid crystal display supporting piece, an FPC (Flexible Printed Circuit) of the liquid crystal display is connected with the double-headed probe, the liquid crystal display is lightened after the double-headed probe is electrified, and an image acquisition device positioned above the liquid crystal display acquires images of the liquid crystal display. If the image acquired by the image acquisition device contains bright or dark points, lines, color spots and the like, the liquid crystal screen after lighting has a defect, and the liquid crystal screen is an unqualified product.
At present, the existing lighting jig needs to manually place the liquid crystal screen so as to connect the FPC board of the liquid crystal screen with the double-ended probe. After the liquid crystal display is placed, the pressure head is horizontally rotated to realize the pressing of the FPC board and the double-ended probes, and further realize the connection of the FPC board and the double-ended probes.
In the process of using the lighting fixture to detect the quality of the liquid crystal screen, the manual mode is used for placing the liquid crystal screen, the efficiency is lower, an operator is easy to contact with the liquid crystal screen, the liquid crystal screen is polluted, and the liquid crystal screen is damaged even when the position is not properly placed. The pressure head produces great vibrations and noise easily at the horizontal pivoted in-process, and produced vibrations often make FPC board and the double-end probe dislocation or aversion of having counterpointed the placing easily for the reliability variation of contact between FPC board and the double-end probe after the pressfitting, influence the testing result. In addition, the horizontal rotation of the pressure head easily causes abrasion between the FPC board and the double-head probe, thereby not only affecting the quality of the liquid crystal screen, but also reducing the service life of the double-head probe; and after the double-end probe is used for many times, the double-end probe can not be well contacted with the FPC board, so that the repeated use stability of the lighting jig is reduced.
Disclosure of Invention
The invention provides an automatic lighting fixture for a liquid crystal display screen, which aims to solve the problems of poor stability and poor reliability of the existing lighting fixture.
The invention provides an automatic lighting fixture for a liquid crystal screen, which comprises a bottom plate, a positioning groove arranged on the bottom plate and a pressing component arranged on the bottom plate and comprising an upper base and a lower base, wherein the pressing component comprises a pressing surface and a pressing surface;
the upper surface of the upper base is provided with a sliding block device, the lower base is hollow, the upper surface of the lower base is provided with a probe guide device and a pressing device which both penetrate through the upper base, and the upper surface of the probe guide device is flush with the upper surface of the upper base;
the pressing device is arranged on one side of the probe guiding device, and the centers of the positioning groove, the probe guiding device and the sliding block device are positioned on the same horizontal line;
the pressing device comprises a fixture block, and the side wall of the fixture block, which is adjacent to the sliding locking block, is an inclined surface;
the sliding block device comprises a sliding locking block and a baffle plate, one end of the sliding locking block is connected with the baffle plate through a first spring, and the end face of the other end of the sliding locking block is an inclined plane; the sliding locking block is positioned below the clamping block, and the inclined plane of the sliding locking block is matched with the inclined plane of the clamping block.
Preferably, the pressing device comprises a base, a guide shaft and a second spring, and a linear bearing penetrating through the base is arranged on the base; the guide shaft penetrates through the upper base, one end of the guide shaft is arranged on the lower base, and the other end of the guide shaft is sleeved in the linear bearing; the second spring is sleeved on the outer surface of the guide shaft.
Preferably, the pressing device further comprises a limiting member disposed at the top end of the linear bearing, and the diameter of the limiting member is larger than that of the linear bearing.
Preferably, the pressing device further comprises a pressing head and a spring baffle which are movably arranged on the base, and the pressing head is connected with the spring baffle through a third spring.
Preferably, the sliding lock piece includes the connecting block and all sets up first sliding lock piece and second sliding lock piece on the connecting block, the terminal surface of first sliding lock piece with the terminal surface of second sliding lock piece is the inclined plane, just the length of first sliding lock piece is good at the length of second sliding lock piece.
Preferably, the slider device further comprises a buffer seat arranged on the upper base, the connecting block and the first spring are both arranged inside the buffer seat, and the first sliding lock block and the second sliding lock block are both arranged outside the buffer seat; the baffle is arranged on one side, far away from the first sliding locking block, of the buffer seat.
Preferably, the probe guiding device comprises a double-ended probe and a fixed seat arranged on the upper surface of the lower base, a PCB is arranged on the upper surface of the fixed seat, and a probe mounting seat and a probe guiding seat are arranged on the upper surface of the PCB; the bottom of the probe guide seat is provided with a cavity, and the probe mounting seat is positioned in the cavity; the double-ended probe runs through the probe guide holder, just the one end of double-ended probe with PCB board contacts, and the other end salient in the upper surface of probe guide holder.
Preferably, the probe guide device further comprises a calibration square groove arranged on the probe guide seat, and the centers of the calibration square groove, the double-ended probe and the positioning groove are located on the same horizontal line.
Preferably, the lighting fixture further comprises a buffer device, and the buffer device is fixedly arranged in the hollow interior of the lower base; one end of the buffer device penetrates through the lower base, and the other end of the buffer device penetrates through the fixed base and the PCB and then is connected with the bottom of the probe guide seat.
Preferably, the buffer device comprises a sleeve and a fourth spring arranged in the sleeve, and the sleeve is fixedly arranged on the lower base and penetrates through the lower base, the fixed seat and the PCB; the fourth spring is connected with the bottom of the probe guide seat.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the automatic lighting fixture for the liquid crystal screen provided by the invention needs to be matched with a press-fit air cylinder assembly and an unlocking air cylinder assembly for use so as to realize self-locking and unlocking of the fixture.
During self-locking, the liquid crystal display is accurately placed in the positioning groove through the CCD vision system monitoring and positioning robot manipulator, and the FPC golden finger is placed on the probe guide device; and controlling the pressing air cylinder assembly to descend to press the double-headed probes and the FPC golden fingers in the probe guide device. In the process of controlling the pressing air cylinder assembly to descend, the pressing air cylinder assembly is located above the pressing device, the pressing air cylinder assembly descends to a certain degree and can be pressed on the pressing device, and the pressing device can move downwards under the effect of the pressing air cylinder assembly. The inclined plane of the sliding locking block is matched with the inclined plane of the clamping block, and the clamping block in the pressing device is positioned above the sliding locking block, so that the inclined plane of the clamping block is contacted with the inclined plane of the sliding locking block in the process of descending the pressing device. When the pressing device continues to descend, the clamping block can extrude the sliding locking block, so that the sliding locking block moves towards the baffle plate and extrudes the first spring. When the pressing device continues to descend until the clamping block is located below the sliding locking block, the sliding locking block moves towards the direction far away from the baffle under the action of the elastic force of the first spring, the sliding locking block clamps the clamping block, and the pressing device and the sliding block device are locked. The locked pressing device is pressed on the probe guide device, so that the FPC golden finger is pressed with the double-end probe in the probe guide device, and the pressing cylinder assembly does not descend any more at the moment. The fixture block moves in the vertical direction in the lower pressing device and the sliding locking block moves in the horizontal direction in the slider device, so that the lighting fixture can be locked, the lighting fixture is prevented from being unlocked due to vibration in the carrying process, poor contact between the FPC golden finger and the double-end probe is avoided, and the reliability and stability of locking of the plug wire are guaranteed.
When unlocking, the unlocking air cylinder assembly is controlled to descend to the sliding locking block, the sliding locking block is pressed downwards, and the inclined surface of the sliding locking block is matched with the inclined surface of the clamping block, so that the sliding locking block moves towards the baffle under the effect of pressing downwards of the unlocking air cylinder assembly and extrudes the first spring. When the sliding locking block moves to a position where the sliding locking block does not block the clamping block any more, the clamping block moves upwards, the sliding locking block returns to the original position under the action of the first spring, and unlocking is completed. Therefore, the jig can be unlocked only under the condition that the sliding locking block moves horizontally, so that poor contact between the FPC golden finger and the double-head probe and even unlocking caused by vibration in the carrying process of the lighting jig are avoided, and the reliability and the stability of self-locking are ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic perspective view of an automatic lighting fixture for a liquid crystal display according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a pressing assembly according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a probe guiding device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a calibration square groove provided in an embodiment of the present invention;
fig. 5 is a schematic diagram of a state before self-locking of the automatic lighting fixture for the liquid crystal display according to the embodiment of the invention;
fig. 6 is a schematic diagram illustrating a self-locked state of the automatic lighting fixture for the lcd according to the embodiment of the present invention;
fig. 7 is a schematic diagram of a state of the liquid crystal display automatic lighting fixture according to the embodiment of the present invention before unlocking;
fig. 8 is a schematic diagram illustrating an unlocked state of the automatic lighting fixture for the liquid crystal display according to the embodiment of the invention;
the symbols represent:
1-bottom plate, 2-press-fit assembly, 3-bottom frame, 4-positioning groove, 5-unlocking cylinder assembly, 6-press-fit cylinder assembly, 7-upper base, 8-lower base, 9-slider device, 10-probe guide device, 11-press-down device, 12-slide lock block, 121-connecting block, 122-first slide lock block, 123-second slide lock block, 13-baffle, 14-first spring, 15-fixture block, 16-base, 17-guide shaft, 18-second spring, 19-linear bearing, 20-position limiting part, 21-pressure head, 22-spring baffle, 23-third spring, 24-double-ended probe, 25-fixing seat, 26-PCB plate, 27-probe mounting seat, 28-probe guide seat, 29-calibration square groove, 30-buffer device, 31-sleeve, 32-fourth spring, 33-buffer seat, 34-cavity, 35-push rod, 36-telescopic rod, 37-FPC-finger, 38-golden finger.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Referring to fig. 1, fig. 1 shows a schematic three-dimensional structure diagram of an automatic lighting fixture for a liquid crystal display according to an embodiment of the present invention.
The automatic lighting fixture for the liquid crystal screen comprises a frame 3 positioned at the bottom, wherein the frame 3 is a base of the lighting fixture and supports the whole lighting fixture. The inside of the frame 3 is a hollow structure, the top of the frame 3 is provided with a bottom plate 1, and the bottom plate 1 is used for bearing all components of the lighting jig. The bottom plate 1 is provided with a positioning groove 4 and a pressing component 2. The positioning grooves 4 are used for placing the liquid crystal screen, and the size and the shape of the positioning grooves 4 are arranged according to the liquid crystal screen to be detected. When the liquid crystal screen is positioned and placed, the liquid crystal screen is accurately positioned through a CCD (Charge Coupled Device) vision system, and then a mechanical arm of the robot is controlled to place the liquid crystal screen. When the accurate positioning is carried out, the CCD vision system collects the position information of the calibration square groove 29 arranged on the probe guide seat 28, the FPC golden finger 38 of the liquid crystal screen is accurately placed on the calibration square groove 29, the accurate positioning of the FPC golden finger 38 is realized, the high-precision positioning of the liquid crystal screen is further realized, and the contact reliability of the FPC golden finger 38 and the double-head probe 24 is improved.
The automatic lighting fixture for the liquid crystal screen needs to be matched with the pressing air cylinder assembly 6 and the unlocking air cylinder assembly 5 for use so as to realize self-locking and unlocking of the fixture. The unlocking cylinder component 5 is used for unlocking the liquid crystal screen which is detected so as to conveniently remove the liquid crystal screen from the lighting fixture; the pressing air cylinder assembly 6 is used for pressing and connecting the FPC golden finger 38 of the liquid crystal screen which is not detected with the double-headed probe 24 so as to realize the detection of the lighting fixture on the liquid crystal screen. The press-fit component 2 is arranged on the base plate 1, and part of the components of the press-fit component 2 are arranged in the groove of the base plate 1, so that the operation of the press-fit component 2 by the unlocking cylinder component 5 and the press-fit cylinder component 6 is facilitated.
Compared with the existing lighting fixture, the volume of the automatic lighting fixture for the liquid crystal screen provided by the embodiment of the invention is greatly reduced, and the occupied space is saved; in addition, the lighting fixture with smaller volume can be used for conveniently and rapidly replacing and installing the bottom plates 1 and the press-fit components 2 with different models, has stronger interchangeability and can save the replacement time.
Referring to fig. 2, fig. 2 is a schematic perspective view illustrating a pressing assembly 2 according to an embodiment of the present invention.
The pressing component 2 provided by the embodiment of the invention comprises an upper base 7 and a lower base 8 with a hollow interior, wherein the upper base 7 and the lower base 8 are both arranged on the bottom plate 1, the upper base 7 is arranged on the upper surface of the lower base 8, and the upper surface of the upper base 7 is flush with the upper surface of the bottom plate 1. The upper base 7 is provided with a slider device 9, and the upper surface of the lower base 8 is provided with a probe guide 10 and a pressing device 11. The slider device 9 moves in the horizontal direction, the pressing device 11 moves in the longitudinal direction, the slider device 9 and the pressing device 11 are matched with each other for use, so that the lighting fixture can be subjected to self-locking, and the pressing device 11 cannot loosen the connection between the FPC golden finger 38 and the double-head probe 24 when pressing the probe guide device 10.
Since the upper base 7 is disposed on the lower base 8, the probe guide 10 and the hold-down 11 need to pass through the upper base 7 when disposed on the upper surface of the lower base 8, and the upper surface of the probe guide 10 is flush with the upper surface of the upper base 7. In order to horizontally place the FPC golden finger 38 of the liquid crystal display, the centers of the slider device 9, the probe guide device 10 and the positioning groove 4 are all located on the same horizontal line, meanwhile, the pressing device 11 is arranged on one side of the probe guide device 10, and then the pressing device 11 is directly pressed on the probe guide device 10 after the slider device 9 and the pressing device 11 are locked conveniently.
The slider device 9 comprises a slide lock block 12, a baffle 13 and a buffer seat 33. Set up buffer seat 33 and baffle 13 on the upper base 7, buffer seat 33 and baffle 13 form semi-enclosed inner chamber, set up slide lock piece 12 in this semi-enclosed inner chamber, and slide lock piece 12 is connected with baffle 13 through first spring 14. Further, the sliding lock block 12 includes a connection block 121, a first sliding lock block 122 and a second sliding lock block 123, wherein the first sliding lock block 122 and the second sliding lock block 123 are disposed on the connection block 121 in parallel, and end faces of the first sliding lock block 122 and the second sliding lock block 123 are inclined planes. The first slide lock piece 122 and the second slide lock piece 123 are both located outside the buffer base 33, and the connection block 121 is located inside the buffer base 33. In order to facilitate self-locking and unlocking of the slide lock block 12 and the latch 15, the first slide lock block 122 and the second slide lock block 123 are provided with different lengths. Preferably, the length of the second slide lock block 123 is set to be longer than the length of the first slide lock block 122.
When the sliding lock block 12 and the latch block 15 are self-locked, the latch block 15 is pressed down to the second sliding lock block 123, the second sliding lock block 123 moves towards the baffle 13 and the first spring 14 is pressed due to the pressing down of the latch block 15, and the latch block 15 can move down continuously due to the movement of the baffle 13 until the latch block 15 is located below the second sliding lock block 123. After the fixture block 15 is located below the second sliding lock block 123, because the second sliding lock block 123 is no longer pressed, the second sliding lock block 123 moves away from the baffle 13 under the elastic force of the first spring 14, and the fixture block 15 is clamped by the first sliding lock block 122 and the second sliding lock block 123, so that the self-locking of the sliding lock block 12 and the fixture block 15 is realized, and therefore, the lighting fixture is prevented from being unlocked due to vibration in the carrying process, further, the poor contact between the FPC golden finger 38 and the double-ended probe is avoided, and the reliability and stability of the locking of the plug wire are ensured. Because connecting block 121 is located the inside of buffing pad 33, and first slide locking piece 122 and second slide locking piece 123 are located the outside of buffing pad 33, therefore when second slide locking piece 123 moves to keeping away from baffle 13 direction under the spring action of first spring 14, slide locking piece 12 can not break away from buffing pad 33, buffing pad 33 can play the effect of the buffering of rebounding.
The hold-down device 11 comprises a base 16 and a guide shaft 17, wherein the guide shaft 17 is a supporting shaft of the hold-down device 11, and the base 16 is a foundation for arranging other parts.
A clamping block 15 and a pressure head 21 are adjacently arranged on the base 16, and the clamping block 15 is used for being clamped with the sliding locking block 12; the pressure head 21 is used for enabling the FPC golden finger 38 in the liquid crystal screen to be in contact with the double-headed probe so as to detect whether the quality of the liquid crystal screen meets the requirement or not. The side wall of the clamping block 15 adjacent to the sliding locking block 12 is an inclined surface, and the inclined surface of the clamping block 15 is matched with the inclined surface of the second sliding locking block 123, so that the second sliding locking block 123 can horizontally move in a labor-saving manner in the process that the clamping block 15 moves downwards. The base 16 is provided with a groove with an opening at the bottom, the pressing head 21 is arranged in the groove, a spring baffle 22 is arranged above the pressing head 21 through the second spring 18, the spring baffle 22 is also positioned in the groove, and the second spring 18 cannot pop out of the groove when rebounding. When the spring stopper 22 is pressed, the pressing head 21 can move downward in accordance with the urging of the second spring 18. Since the push rod 35 of the stitching cylinder assembly 6 is located right above the spring baffle 22, the stitching cylinder assembly 6 pushes the hold-down device 11 to move downwards, that is, the push rod 35 pushes the spring baffle 22 to move downwards.
The linear bearing 19 is arranged inside the base 16, the second spring 18 is sleeved on the outer surface of the guide shaft 17, and the linear bearing 19 can be matched with the guide shaft 17 and the second spring 18 to realize the up-and-down movement of the pressing device 11. One end of the guide shaft 17 penetrates through the upper base 7 and is arranged on the lower base 8, and the other end is sleeved in the linear bearing 19. Since the second spring 18 is sleeved on the outer surface of the guide shaft 17, one end of the second spring 18 is arranged on the lower base 8 after penetrating through the upper base 7, and the other end is connected with the lower surface of the linear bearing 19. Further, a stopper 20 is disposed on the top of the linear bearing 19, and the diameter of the stopper 20 is larger than that of the linear bearing 19, so that the linear bearing 19 does not separate from the base 16 when moving upward. The linear bearing 19 is likely to come into contact with the stopper 20 when rebounding by the second spring 18, and the linear bearing 19 is a rigid member, so that the linear bearing 19 is damaged every time rebounding, and the service life of the linear bearing 19 is reduced. In order to increase the service life of the linear bearing 19, in the embodiment of the present invention, the limiting member 20 is a silicone pad to increase the elasticity between the linear bearing 19 and the limiting member 20.
Referring to fig. 3, fig. 3 is a schematic perspective view of a probe guiding device 10 according to an embodiment of the present invention.
The probe guiding device 10 provided by the embodiment of the invention comprises a double-head probe 24 and a fixed seat 25 arranged on the upper surface of the lower base 8. The fixing base 25 is used for placing a Printed Circuit Board (PCB) 27, and thus the PCB 26 is fixedly placed on the upper surface of the fixing base 25. The upper surface of the PCB 26 is provided with a probe mounting seat 27 and a probe guide seat 28, wherein the probe mounting seat 27 is fixedly arranged on the PCB 26, and the probe guide seat 28 is movably arranged on the PCB 26. The guide base 29 has a cavity 34 at the bottom, and the probe mounting base 27 is disposed in the cavity 34. The probe mount 27 is provided with a double-headed probe 24, and the double-headed probe 24 penetrates the probe mount 27. One end of the double-headed probe 24 is connected with the PCB 26, so that the double-headed probe 24 is electrified when the PCB 26 is electrified; the other end of the dual-headed probe 24 protrudes above the upper surface of the probe mount 27 to enable the FPC gold fingers 38 placed on the probe guide 28 to contact the dual-headed probe 24. After the FPC golden finger 38 is contacted with the double-headed probe 24, the PCB 26 is electrified, and because the two ends of the double-headed probe 24 are respectively contacted with the PCB 26 and the FPC golden finger 38, the FPC golden finger 38 is also electrified, and then the liquid crystal screen is lightened, so that the detection of the liquid crystal screen is facilitated.
Further, the probe guiding device 10 further includes a calibration square groove 29 disposed on the probe guiding seat 28, and the calibration square groove 29 is used for calibrating the position of the FPC golden finger 38 placed on the probe guiding seat 28 in the liquid crystal display to realize the accurate placement of the liquid crystal display, as shown in fig. 4. When the calibration square groove 29 is set, the centers of the calibration square groove 29, the double-headed probe 24 and the positioning groove 4 are positioned on the same horizontal line, so that the liquid crystal display can be accurately placed in the positioning groove 4 when the FPC golden finger 38 of the liquid crystal display is positioned.
The automatic lighting fixture for the lcd further includes a buffer device 30, which is shown in fig. 2. During the downward movement of the pressing device 11, the pressing head 21 presses the probe guide seat 28 to move downward, and if the pressing force of the pressing head 21 is too large, the double-ended probe 24 disposed on the probe mounting seat 27 is bent. To facilitate bending of the dual-ended probe 24, the probe guide 28 is provided as a floatable unit. Set up probe guide seat 28 and can realize probe guide seat 28's fluctuation on buffer 30, concrete setting is: buffer 30 sets up in the inside cavity of lower base 8, and buffer 30's one end runs through lower base 8, and the other end runs through and sets up the bottom at probe guide holder 28 behind fixing base 25 and the PCB board 26, realizes that buffer 30 connects lower base 8, fixing base 25, PCB board 26 and probe guide holder 28 simultaneously. The buffer device 30 may be provided as an elastic member to achieve a buffering action of the buffer device 30. In addition, the buffering device 30 can be configured as a combination of a sleeve 31 and a fourth spring 32, wherein the fourth spring 32 is disposed inside the sleeve 31 and connected to the bottom of the probe guide seat 28; the sleeve 31 is fixedly arranged on the lower base 8, and the sleeve 31 penetrates through the lower base 8, the fixed seat 25 and the PCB 26. In the above-described assembly, the buffer device 30 functions as a buffer due to the elastic force of the fourth spring 32.
When the buffer device 30 buffers the probe guide seat 28, in order to prevent the fixed seat 25, the PCB 26 and the probe guide seat 28 from being dislocated due to buffering vibration, positioning pins 37 penetrating through the three components are further disposed at the side edges of the fixed seat 25, the PCB 26 and the probe guide seat 28.
Referring to fig. 5 and 6, fig. 5 and 6 respectively show schematic state diagrams before and after self-locking of the automatic lighting fixture for lcd panels according to an embodiment of the present invention, wherein (1), (2), (3) and arrows in fig. 5 and 6 respectively show a movement direction and a sequence of each component, and specifically refer to the following contents.
Because different jigs have position difference in the operation location on the equipment, the compensation amount of the target location is calculated through the CCD visual system and the calibration square groove 29 arranged on the probe guide seat 28 when the liquid crystal screen is located and placed, the position where the FPC golden finger 38 of the liquid crystal screen is to be placed is accurately located, and then the mechanical arm of the robot is controlled to accurately place the liquid crystal screen and the FPC golden finger 38. The push rod 35 of the stitching cylinder assembly 6 is controlled to move downwards and extrude the spring baffle 22, the pressure head 21 moves downwards under the action of the third spring 23 until reaching the lowest end of the base 16, and the push rod 35 moves downwards continuously to drive the base 16 to move downwards, which is the process (1) in fig. 5. In the downward movement process of the base 16, since the latch 15 is disposed on the base 16, the latch 15 also moves downward along with the base 16, which is the process (2) in fig. 5. In the process of moving the latch 15 downward, the inclined surface of the latch 15 contacts the inclined surface of the second slide lock block 123, and due to the pressure of the latch 15, the second slide lock block 123 moves toward the baffle 13 and presses the first spring 14, which is the process (3) in fig. 5.
After the second sliding lock block 123 moves towards the direction of the baffle 13, the latch 15 still moves downwards under the action of the stitching cylinder assembly 6 until the latch 15 is located below the second sliding lock block 123, and at this time, the second sliding lock block 123 is no longer subject to the pressing force from the latch 15, but is subject to the elastic force from the first spring 14. The second sliding lock block 123 moves in a direction away from the baffle 13 under the action of the elastic force of the first spring 14 until the second sliding lock block 123 is positioned right above the fixture block 15 and clamps the fixture block 15, so as to realize self-locking, which is the process (1) in fig. 6. After the second sliding locking block 123 and the clamping block 15 are self-locked, the double-ended probe 24 can be in close contact with the FPC golden finger 38 under the action of the pressure head 21, and the reliability and the stability of detection are improved. In addition, due to the buffering action of the third spring 23 and the buffering device 30, the probe guide seat 28 can float up and down between the third spring 23 and the buffering device 30, and the double-ended probe 24 is not damaged. After the liquid crystal display is detected, the push rod 35 is withdrawn, so that the pressing head 21 is restored to the original position under the action of the third spring 23, which is the process (2) in fig. 6.
As can be seen from the above description, the automatic lighting fixture for the liquid crystal display provided by the embodiment of the invention realizes self-locking through the pressing device 11 and the slider device 9, the self-locked double-headed probe 24 can be tightly and stably contacted with the FPC golden finger 38, and the reliability can reach over 99.5%. The automatic lighting fixture for the liquid crystal screen provided by the embodiment of the invention has a simple self-locking process and is easy to control.
Referring to fig. 7 and 8, fig. 7 and 8 respectively show schematic state diagrams before and after unlocking of the automatic lighting fixture for liquid crystal display provided by the embodiment of the present invention, wherein (1), (2), (3) and arrows in fig. 7 and 8 respectively show a movement direction and a sequence of each component, and specifically refer to the following contents.
After the liquid crystal display is detected, the telescopic rod 36 of the unlocking cylinder assembly 5 is controlled to extrude the first sliding lock block 122, and the process is the process (1) in fig. 7. The first sliding lock piece 122 moves towards the direction of the baffle 13 and presses the first spring 14 under the action of the telescopic rod 36, and since the first sliding lock piece 122 and the second sliding lock piece 123 are both arranged on the connecting block 121, the second sliding lock piece 123 also moves along with the movement of the first sliding lock piece 122 until the second sliding lock piece 123 is far away from the latch block 15, which is the process (2) in fig. 7.
After the second sliding lock block 123 is away from the latch block 15, the base 16 moves upward under the action of the guide shaft 17, the second spring 18 and the linear bearing 19, and then the latch block 15 also moves upward until the latch block 15 is located above the second sliding lock block 123, which is the process (1) in fig. 8. After the clamping block 15 is located above the second sliding lock block 123, the telescopic rod 36 of the unlocking cylinder assembly 5 is withdrawn, so that the first sliding lock block 122 is no longer pressed by the telescopic rod 36, which is the process (2) in fig. 8. After the first sliding lock block 122 is no longer subjected to the squeezing force of the telescopic rod 36, the first sliding lock block 122 moves in the direction away from the baffle 13 under the action of the elastic force of the first spring 14 until the first spring 14 is restored, and the unlocking is completed, which is the process (3) in fig. 8.
As can be seen from the above description, the automatic lighting fixture for the lcd panel provided in the embodiment of the present invention must be unlocked only when the first sliding lock block 122 is pressed, and is not unlocked due to vibration, and the unlocking process is simple and easy to control.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. An automatic liquid crystal screen lighting jig comprises a bottom plate (1) and a positioning groove (4) arranged on the bottom plate (1), and is characterized by further comprising a pressing component (2) which is arranged on the bottom plate (1) and comprises an upper base (7) and a lower base (8);
the upper surface of the upper base (7) is provided with a sliding block device (9), the lower base (8) is hollow, the upper surface of the lower base (8) is provided with a probe guide device (10) and a pressing device (11) which penetrate through the upper base (7), and the upper surface of the probe guide device (10) is flush with the upper surface of the upper base (7);
the pressing device (11) is arranged on one side of the probe guide device (10), and the centers of the positioning groove (4), the probe guide device (10) and the slide block device (9) are positioned on the same horizontal line;
the pressing device (11) comprises a clamping block (15), and the side wall, adjacent to the sliding locking block (12), in the side wall of the clamping block (15) is an inclined surface;
the sliding block device (9) comprises a sliding locking block (12) and a baffle (13), one end of the sliding locking block (12) is connected with the baffle (13) through a first spring (14), and the end face of the other end of the sliding locking block (12) is an inclined plane; the sliding locking block (12) is located below the clamping block (15), and the inclined plane of the sliding locking block (12) is matched with the inclined plane of the clamping block (15).
2. The automatic lighting fixture of the LCD screen according to claim 1, characterized in that the pressing device (11) comprises a base (16), a guide shaft (17) and a second spring (18), and a linear bearing (19) penetrating through the base (16) is arranged on the base (16); the guide shaft (17) penetrates through the upper base (7), one end of the guide shaft (17) is arranged on the lower base (8), and the other end of the guide shaft (17) is sleeved in the linear bearing (19); the second spring (18) is sleeved on the outer surface of the guide shaft (17).
3. The automatic lighting fixture for lcd panels according to claim 2, wherein the pressing device (11) further comprises a limiting member (20) disposed at the top end of the linear bearing (19), and the diameter of the limiting member (20) is larger than the diameter of the linear bearing (19).
4. The automatic lighting fixture for the LCD screen according to claim 2, wherein the pressing device (11) further comprises a pressing head (21) and a spring baffle (22) movably arranged on the base (16), and the pressing head (21) and the spring baffle (22) are connected through a third spring (23).
5. The automatic lighting fixture for the LCD screen according to claim 1, wherein the sliding lock block (12) comprises a connecting block (121), and a first sliding lock block (122) and a second sliding lock block (123) both disposed on the connecting block (121), the end surfaces of the first sliding lock block (122) and the second sliding lock block (123) are both inclined surfaces, and the length of the first sliding lock block (122) is longer than that of the second sliding lock block (123).
6. The automatic lighting fixture for the LCD screen according to claim 5, wherein the slider device (9) further comprises a buffer seat (33) arranged on the upper base (7), the connecting block (121) and the first spring (14) are both arranged inside the buffer seat (33), and the first sliding lock block (122) and the second sliding lock block (123) are both arranged outside the buffer seat (33); the baffle (13) is arranged on one side, far away from the first sliding locking block (122), of the buffer seat (33).
7. The automatic lighting fixture for the liquid crystal display screen according to any one of claims 1 to 6, wherein the probe guiding device (10) comprises a double-ended probe (24) and a fixed seat (25) arranged on the upper surface of the lower base (8), a PCB (26) is arranged on the upper surface of the fixed seat (25), and a probe mounting seat (27) and a probe guiding seat (28) are arranged on the upper surface of the PCB (26); a cavity (34) is formed in the bottom of the probe guide seat (28), and the probe mounting seat (27) is located in the cavity (34); the double-end probe (24) runs through the probe guide seat (28), one end of the double-end probe (24) is in contact with the PCB (26), and the other end of the double-end probe protrudes out of the upper surface of the probe guide seat (28).
8. The automatic lighting fixture for LCD screens according to claim 7, characterized in that the probe guiding device (10) further comprises a calibration square groove (29) arranged on the probe guiding seat (28), and the centers of the calibration square groove (29), the double-ended probe (24) and the positioning groove (4) are located on the same horizontal line.
9. The automatic lighting fixture of claim 7, characterized in that, the lighting fixture further comprises a buffer device (30), the buffer device (30) is fixedly arranged in the hollow interior of the lower base (8); one end of the buffer device (30) penetrates through the lower base (8), and the other end of the buffer device penetrates through the fixed seat (25) and the PCB (26) and then is connected with the bottom of the probe guide seat (28).
10. The lcd panel automatic lighting fixture of claim 9, wherein the buffer device (30) comprises a sleeve (31) and a fourth spring (32) disposed in the sleeve (31), the sleeve (31) is fixedly disposed on the lower base (8) and penetrates through the lower base (8), the fixing seat (25) and the PCB (26); the fourth spring (32) is connected with the bottom of the probe guide seat (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207655.1A CN106597706B (en) | 2016-12-23 | 2016-12-23 | Automatic lighting fixture for liquid crystal screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207655.1A CN106597706B (en) | 2016-12-23 | 2016-12-23 | Automatic lighting fixture for liquid crystal screen |
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| CN106597706A CN106597706A (en) | 2017-04-26 |
| CN106597706B true CN106597706B (en) | 2023-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611207655.1A Active CN106597706B (en) | 2016-12-23 | 2016-12-23 | Automatic lighting fixture for liquid crystal screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104932126B (en) * | 2015-06-30 | 2018-01-30 | 合肥京东方显示光源有限公司 | A kind of tool |
| CN107328557A (en) * | 2017-07-18 | 2017-11-07 | 北京兆维电子(集团)有限责任公司 | A kind of OLED screen Pneumatic pressure needle device |
| CN109633934B (en) * | 2017-10-09 | 2024-02-27 | 苏州凌云视界智能设备有限责任公司 | Lighting pressing mechanism and lighting jig |
| CN107966842A (en) * | 2018-01-16 | 2018-04-27 | 昆山精讯电子技术有限公司 | A kind of display module detection device |
| CN108132551B (en) * | 2018-01-30 | 2024-01-30 | 合肥研力电子科技有限公司 | Lighting jig |
| CN108803099A (en) * | 2018-08-16 | 2018-11-13 | 武汉精测电子集团股份有限公司 | A kind of flexible hardness screen detection jig of included backlight |
| CN108957810B (en) * | 2018-08-17 | 2021-07-16 | 苏州凌云视界智能设备有限责任公司 | Device for lighting screen |
| CN109597230B (en) * | 2019-01-28 | 2021-09-24 | 苏州凌云视界智能设备有限责任公司 | Automatic crimping and lighting equipment for LCD module |
| CN110045525A (en) * | 2019-04-17 | 2019-07-23 | 武汉华星光电技术有限公司 | Lighting jig and ignition method |
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