CN115373166A

CN115373166A - Component testing device and testing method for liquid crystal display screen

Info

Publication number: CN115373166A
Application number: CN202211067779.XA
Authority: CN
Inventors: 韦文勇; 齐斌斌; 何栢根
Original assignee: Shenzhen Chuangyuan Microelectronic Technology Co ltd
Current assignee: Shenzhen Chuangyuan Microelectronic Technology Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-11-22

Abstract

The invention discloses a testing device and a testing method for a component of a liquid crystal display screen, wherein the testing device comprises a bottom plate and a supporting plate rotatably arranged at the top of the bottom plate, a bracket is arranged on one side of the supporting plate, a light source is arranged on the bottom surface of the bracket, a metal probe is arranged at the bottom end of the supporting plate, and a supporting column is slidably connected to the top of the bottom plate; a blocking disc is fixedly sleeved on the outer side of the metal probe, a sliding sleeve which slides relative to the metal probe is arranged at the bottom end of the blocking disc, a first spring is arranged between the bottom surface of the blocking disc and the top surface of the sliding sleeve, an adjusting assembly is arranged on the strut, and when the strut is extruded by rotating the supporting plate to slide downwards, the metal probe is driven to move downwards through the adjusting assembly; the probe can be driven to move downwards through the adjusting component, so that the display screen is prevented from contacting with the metal probe in the process of rotating to the horizontal state, and the metal probe and the abrasion and the damage of the circuit board caused by the relative sliding of the metal probe and the circuit board on the display screen are avoided.

Description

Component testing device and testing method for liquid crystal display screen

Technical Field

The invention relates to the technical field of display screen assembly testing, in particular to an assembly testing device and a testing method for a liquid crystal display screen.

Background

The liquid crystal display screen is a planar liquid crystal display screen, consists of a certain number of color or black-and-white image groups, and is placed on the source side of a light source which is opposite to the source side. The liquid crystal consumption of the liquid crystal display screen is due to the fact that the liquid is due to electricity, the liquid is suitable for enabling the liquid to be arranged on the liquid crystal display screen output source, and the light sensing arrangement component on the liquid crystal display screen output source needs to be tested, so that the display screen can be used for adjusting the enough brightness of the screen according to enough brightness.

Chinese patent CN111337775B discloses a display screen assembly testing device and a display screen assembly testing system. The display screen assembly testing device is used for detecting the photosensitive characteristic of the display screen assembly, and the display screen assembly comprises a first display screen and a light sensing element arranged in the first display screen. Display screen subassembly testing arrangement includes: a substrate; the fixing assembly is arranged on the substrate and used for fixing the first display screen; the light source is arranged on the substrate and is opposite to the fixing component, and the light source is used for emitting light towards the light sensing element; and the at least one first metal probe is arranged on the fixing component and faces the light source, and is used for contacting and electrically connecting the conductive part on the light sensing element when the first display screen is fixed on the fixing component. The application provides a display screen subassembly testing arrangement is in order to reduce returning because of, the dismouting problem that the assembly of light sense component caused, and in order to improve the yields of complete machine.

Through the fixed mainboard and the metal probe electricity that makes it on with the display screen among the above-mentioned device, but it has contacted with metal probe at the source of fixed display screen, because of make display screen and metal probe produce relative movement at the fixed in-process of centre gripping to accelerate metal probe's wearing and tearing and enough do benefit to the mainboard on the display screen and protect, when enough, because metal probe is enough scalable, lead to placing and can damage metal probe with the in-process of fixed display screen.

Therefore, it is necessary to provide a device and a method for testing a liquid crystal display device assembly to solve the above problems.

Disclosure of Invention

The invention aims to provide a testing device and a testing method for a component for a liquid crystal display screen, which aim to solve the problem that in the prior art, a display screen is fixed to enable a mainboard on the display screen to be electrically connected with a metal probe, but the display screen is fixed to be in contact with the metal probe, so that the display screen and the metal probe move relatively in the clamping and fixing process, the abrasion of the metal probe is accelerated, the protection of the mainboard on the display screen is facilitated, and when the metal probe is telescopic enough, the metal probe can be damaged in the process of placing and fixing the display screen.

Based on the above thought, the invention provides the following technical scheme: the device comprises a bottom plate and a support plate rotatably arranged at the top of the bottom plate, wherein a support is arranged on one side of the support plate, a light source is arranged on the bottom surface of the support, a metal probe is arranged at the bottom end of the support plate, and a support column is slidably connected to the top of the bottom plate;

the fixed cover in metal probe's the outside is equipped with and keeps off the dish, and the bottom that keeps off the dish is provided with the sliding sleeve with metal probe relative slip, be provided with first spring between the bottom surface of keeping off the dish and the top surface of sliding sleeve, be provided with adjusting part on the pillar, when rotating backup pad extrusion pillar lapse, drive metal probe downstream through adjusting part, after the display screen rotates to the horizontality, drive metal probe upward movement gradually and contact with the mainboard on the display screen through first spring.

As a further scheme of the invention: the adjusting part comprises a sliding plate fixedly connected to the inner side of the pillar, a limiting rod is arranged on the outer side of the sliding plate, a sliding groove is formed in the inner side face of the sliding plate, a sliding block is connected to the inside of the sliding groove in a sliding mode, a connecting column is connected to one side face, close to the limiting rod, of the sliding block in a rotating mode, a first limiting section, a second limiting section and a third limiting section which are communicated with one another are arranged on the limiting rod, the second limiting section is arranged between the first limiting section and the third limiting section, and the second limiting section is arranged to be arc-shaped and is located at a position, far away from the sliding sleeve, relative to the first limiting section and the third limiting section.

As a further scheme of the invention: the inside sliding connection of sliding sleeve has sealed dish, the metal probe extends to the inside one end of sliding sleeve and sealed dish fixed connection, the bottom of sealed dish is provided with the stay cord, the one end of stay cord and the bottom surface fixed connection who seals the dish, the other end of stay cord wear out the sliding sleeve and with spliced pole fixed connection, the bottom of sliding sleeve is provided with the pulley, walk around from the outside of pulley when the stay cord passes the sliding sleeve bottom.

As a further scheme of the invention: the outside of sliding sleeve still is provided with intake pipe and blast pipe, the aperture of blast pipe is greater than the aperture of intake pipe, be provided with the first check valve that supplies outside gas one-way entering to the inside of sliding sleeve in the intake pipe, be provided with the second check valve that supplies the inside gas one-way exhaust of sliding sleeve on the blast pipe.

As a further scheme of the invention: the fixed column that is provided with in bottom plate top, the fixed column sets up to the U type, the bar groove that link up has all been seted up to the both sides face of fixed column, fixedly connected with and bar groove matched with lug on the both sides face of pillar, fixedly connected with montant on the inside bottom surface of fixed column, the montant penetrates the inside of fixed column and rather than sliding connection, the outside cover of montant is equipped with the second spring, the second spring sets up between the inside bottom surface of fixed column and pillar.

As a further scheme of the invention: the top of the bottom plate is fixedly connected with a positioning assembly; the positioning assembly comprises a positioning plate fixedly connected to the top of the bottom plate, a positioning bolt is in threaded connection with the positioning plate, a positioning block is fixedly connected to the outer side face of the strut, and a positioning hole matched with the positioning bolt is formed in the outer side face of the strut.

As a further scheme of the invention: the top of backup pad is provided with the centre gripping subassembly, the centre gripping subassembly is including fixing the baffle in the backup pad, the inboard of baffle is provided with the splint of L type, the outside fixedly connected with guiding axle of splint, the guiding axle run through the baffle and rather than sliding connection, the outside of baffle is provided with locking screw, locking screw passes the baffle and rather than threaded connection, locking screw is close to the one end of splint and passes through the bearing rather than rotate and be connected.

As a further scheme of the invention: one side that the support was kept away from to the backup pad bottom is provided with the supporting leg, fixedly connected with cross axle between two supporting legs, the cross axle runs through the backup pad and rotates rather than being connected, one side that the support was kept away from at the top of backup pad is provided with the blend stop.

As a further scheme of the invention: the fixed frame is installed in the outside of pulley, fixed frame top fixedly connected with circle axle, the bottom rotation of circle axle and sliding sleeve is connected.

A testing method using a component testing apparatus for a liquid crystal display panel, comprising the steps of:

s1, placing a display screen to be tested on a supporting plate, and fixing the display screen through a clamping assembly;

s2, driving the display screen to rotate downwards through the supporting plate, and when the display screen rotates to a horizontal position, positioning the display screen through the positioning bolt to enable the display screen to be kept in the horizontal position and to be in contact with the metal probe at the bottom end of the display screen;

and S3, changing the brightness of a light source on the support to test the photosensitive assembly on the display screen.

Compared with the prior art, the invention has the beneficial effects that: when rotating backup pad extrusion pillar and gliding down, can drive the probe through adjusting part and move down to avoid the display screen to rotate to the in-process of horizontality and contact with metal probe, and rotate to the horizontality when the display screen, positioning bolt and locating hole cooperate the back, metal probe upwards moves gradually and contacts with the mainboard on the display screen, thereby realizes electric connection, to sum up, through the adjusting part that sets up, make the display screen pivoted down in-process, metal probe is along with the downstream also, thereby avoids the relative slip of circuit board on metal probe and the display screen.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic view of the adjustment assembly of the present invention;

FIG. 4 is a schematic view of the structure of the limiting rod, the connecting column and the sliding plate of the present invention;

FIG. 5 is a schematic view of the seal disk and pull cord configuration of the present invention;

FIG. 6 is a schematic view of the sliding sleeve structure of the present invention;

FIG. 7 is a schematic view of the construction of the post, stem and secondary spring of the present invention;

FIG. 8 is an enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 9 is a front view of the present invention;

FIG. 10 is an enlarged view of the structure of the portion B of FIG. 1 according to the present invention.

In the figure: 1. a support plate; 2. a support; 3. a guide shaft; 4. locking the screw rod; 5. a splint; 6. a baffle plate; 7. supporting legs; 8. a base plate; 9. positioning a plate; 10. positioning the bolt; 11. positioning holes; 12. a pillar; 13. positioning blocks; 14. a metal probe; 15. a catch tray; 16. a first spring; 17. blocking strips; 18. a sliding sleeve; 19. an exhaust pipe; 20. a slide plate; 21. an air inlet pipe; 22. a pulley; 23. pulling a rope; 24. connecting columns; 25. a first limiting section; 26. a second spring; 27. a vertical rod; 28. a second limiting section; 29. a slider; 30. fixing a column; 31. a bump; 32. a limiting rod; 33. a third limiting section; 34. a light source; 35. sealing disk.

Detailed Description

As shown in fig. 1-2, a testing apparatus and a testing method for a component of a liquid crystal display, including a bottom plate 8 and a supporting plate 1 disposed on top of the bottom plate 8 for supporting a display, and a bracket 2 is disposed on one side of the supporting plate 1, the bracket 2 is L-shaped and fixed on the bottom plate 8, and a light source 34 opposite to the display is disposed on a bottom surface of a horizontal section thereof, and in an actual use process, the light source 34 may be an LED light source, etc., and a photosensitive component on the display is tested by changing brightness of the light source 34.

Be provided with metal probe 14 in the bottom of backup pad 1, when the display screen was placed in backup pad 1, rotate backup pad 1 to horizontality for mainboard and metal probe 14 on the display screen are connected, and in the in-service use process, metal probe 14 and mainboard and electric connection on the display screen, and mainboard and metal probe 14 electric connection, because of can test sensitization subassembly on the display screen because of establishing the external display of metal probe 14 etc..

In order to support backup pad 1, be provided with supporting leg 7 in its one side bottom of keeping away from support 2, and fixedly connected with cross axle between two supporting legs 7, the cross axle runs through backup pad 1 and is connected rather than rotating, one side of keeping away from support 2 at the top of backup pad 1 is provided with blend stop 17, thereby in order to carry on spacingly to the display screen, avoid it landing from backup pad 1, and the top both sides of backup pad 1 all are provided with the centre gripping subassembly that is used for carrying out the centre gripping to the display screen.

Further, a fixing column 30 is arranged between the supporting leg 7 and the bracket 2 at the top of the bottom plate 8, the fixing column 30 is U-shaped, a supporting column 12 for supporting the supporting plate 1 is connected in a sliding mode, and a positioning assembly is fixedly connected to the top of the bottom plate 8 for positioning the supporting column 12; specifically, locating component includes fixed connection in the locating plate 9 at 8 tops of bottom plate, and threaded connection has positioning bolt 10 on the locating plate 9, and fixed connection has locating piece 13 on the lateral surface of pillar 12, and has seted up on the lateral surface of pillar 12 with positioning bolt 10 matched with locating hole 11.

Furthermore, both sides of the fixed column 30 are provided with a through strip-shaped groove, both sides of the pillar 12 are fixedly connected with a convex block 31 matched with the strip-shaped groove, the pillar 12 is limited in the fixed column 30 to slide up and down through the matching of the convex block 31 and the strip-shaped groove, in order to further improve the sliding stability of the pillar 12, a vertical rod 27 is fixedly connected to the inner bottom surface of the fixed column 30, the vertical rod 27 penetrates into the fixed column 30 and is in sliding connection with the fixed column 30, a second spring 26 is sleeved on the outer side of the vertical rod 27, and the second spring 26 is arranged between the inner bottom surface of the fixed column 30 and the pillar 12.

During the in-service use, place the display screen that will need the test on backup pad 1, fix the display screen on backup pad 1 through the centre gripping subassembly, rotate backup pad 1 in the time and make it rotate downwards, thereby make backup pad 1 cause the extrusion to pillar 12 to drive its length direction lapse along fixed column 30, when locating piece 13 contacts with locating plate 9, backup pad 1 drives the display screen and rotates to horizontal position, locating hole 11 on pillar 12 aligns with positioning bolt 10 in the time, be connected it with pillar 12 through rotating positioning bolt 10, thereby fix pillar 12, and when the display screen rotates to horizontal position, mainboard on it contacts with metal probe 14, test in order to the sensitization subassembly on the display screen through the luminance that changes light source 34 on the support 2.

As shown in fig. 2, in an actual use process, in order to enable the metal probe 14 to be in close contact with a main board on a display screen, a blocking disc 15 is fixedly sleeved outside the metal probe 14, a sliding sleeve 18 is disposed at a bottom end of the blocking disc 15, the bottom end of the metal probe 14 penetrates through the sliding sleeve 18 and is in sliding connection with the sliding sleeve 18, a first spring 16 is disposed between a bottom surface of the blocking disc 15 and a top surface of the sliding sleeve 18, and the first spring 16 is sleeved outside the metal probe 14.

In the in-service use process, drive the display screen through backup pad 1 and rotate, when it rotated and was in the horizontality gradually, mainboard on the display screen can extrude metal probe 14 gradually and make it overcome the resistance of first spring 16 and move down, and the source effort to keeping off dish 15 through first spring 16 makes metal probe 14 have the trend of upwards moving, and then makes metal probe 14 and mainboard in close contact with on the display screen to in accomplishing the test procedure.

As shown in fig. 2-8 and 10, in the process that the display screen rotates downward and gradually contacts with the metal probes 14, the main board on the display screen and the metal probes 14 move relatively, which causes increased wear between the main board and the metal probes 14, on one hand, the main board is favorable for stabilizing the electrical connection, and on the other hand, the main board on the display screen is also damaged to some extent.

Because of this, be provided with adjusting part on pillar 12, when rotating backup pad 1 extrusion pillar 12 and sliding down, can drive the probe through adjusting part and move down, thereby avoid the display screen to rotate the in-process to the horizontality and contact with metal probe 14, and rotate to the horizontality when the display screen, positioning bolt 10 and locating hole 11 cooperate the back, metal probe 14 gradually rebound and with the mainboard on the display screen contact, thereby realize electric connection, to sum up, through the adjusting part that sets up, make the display screen pivoted in-process, metal probe 14 also along with the rebound, thereby avoid the relative slip of circuit board on metal probe 14 and the display screen.

Further, the adjusting assembly specifically includes a sliding plate 20 fixedly connected to the inner side of the pillar 12, a limiting rod 32 is arranged on the outer side of the sliding plate 20, the limiting rod 32 is fixedly connected to a fixing column 30 through a supporting rod, a sliding groove is formed in the inner side surface of the sliding plate 20, a sliding block 29 is slidably connected to the inner side surface of the sliding groove, and a connecting column 24 is rotatably connected to one side surface, close to the limiting rod 32, of the sliding block 29.

Furthermore, the limiting rod 32 is provided with a first limiting section 25, a second limiting section 28 and a third limiting section 33 which are through, specifically, the second limiting section 28 is arranged between the first limiting section 25 and the third limiting section 33 and is mutually communicated with the first limiting section 25 and the third limiting section 33, and the first limiting section 25 is arc-shaped and is positioned at a position close to the sliding sleeve 18, so that when the connecting column 24 slides to the bottom end position of the first limiting section 25, the connecting column is closest to the sliding sleeve 18; the second position-limiting section 28 is arc-shaped and is located at a position far away from the sliding sleeve 18, and when the connecting column 24 enters the second position-limiting section 28, the connecting column gradually gets away from the sliding sleeve 18; the third position-limiting section 33 is a straight section, and is located closer to the sliding sleeve 18 than the second position-limiting section 28.

The sealing disc 35 is connected to the inside of the sliding sleeve 18 in a sliding manner, during actual installation, a rubber sealing ring can be sleeved on the outer side of the sealing disc 35 to increase the sealing performance of the sealing disc connected with the sliding sleeve 18, one end of the metal probe 14 extending to the inside of the sliding sleeve 18 is fixedly connected with the sealing disc 35, the bottom of the sealing disc 35 is provided with the pull rope 23, specifically, one end of the pull rope 23 is fixedly connected with the bottom surface of the sealing disc 35, the other end of the pull rope 23 penetrates out of the sliding sleeve 18 and is fixedly connected with the connecting column 24, specifically, the pull rope 23 is slidably connected with the sliding sleeve 18, the bottom end of the sliding sleeve 18 is provided with the pulley 22, the pull rope 23 bypasses the outer side of the pulley 22 when penetrating through the bottom of the sliding sleeve 18, the fixing frame is installed on the outer side of the pulley 22, and the fixing frame is rotatably connected with the sliding sleeve 18 through a round shaft arranged on the top.

Outside, still be provided with intake pipe 21 and blast pipe 19 in the outside of sliding sleeve 18, the aperture of blast pipe 19 will be greater than the aperture of intake pipe 21, and is provided with the one-way first check valve that enters into sliding sleeve 18 inside of confession outside gas on intake pipe 21, and is provided with the one-way exhaust second check valve of confession sliding sleeve 18 inside gas on blast pipe 19.

In practical use, when the display screen is driven to rotate by the support plate 1, the support column 12 can be squeezed to drive the support column to move downwards, the slide plate 20 can be driven to move downwards by the support column 12, and the slide plate 20 and the connecting column 24 inside the slide plate can move downwards step by step, so that the connecting column 24 slides from the third limiting section 33 on the limiting rod 32 to the second limiting section 28, because the distance from the connecting column 24 to the sliding sleeve 18 gradually increases, so that the connecting column 24 can pull the pull rope 23, so that the pull rope 23 drives the sealing disc 35 to move downwards inside the sliding sleeve 18, and the air at the bottom end of the sealing disc 35 inside the sliding sleeve 18 is discharged to the outside sufficiently in a one-way manner through the exhaust pipe 19, because the connecting column 24 can drive the sealing disc 35 and the metal probe 14 at the top end of the sealing disc 35 to move downwards by the pull rope 23, when the connecting column 24 slides to the first limiting section 25, the distance from the connecting column 18 to the sliding sleeve 18 is gradually reduced, so that the pull rope 23 is loosened, because the connecting column 15 and the metal probe 14 and the inner diameter of the metal probe 18 moves upwards, and the air is slowly moved to the sliding sleeve 18 through the positioning hole 21, so that the positioning hole 18 is smaller than when the connecting column 18 moves upwards, and the air is moved to the positioning hole 18, and the supporting column 18 moves upwards, so that the air is moved to the positioning hole 18, and the positioning hole 18 is moved upwards, and the supporting column 18 is moved upwards, and the positioning hole 18 is slowly and the positioning hole 18 is smaller, therefore, the metal probe 14 is gradually driven to move upwards under the action of the first spring 16 and to be in close contact with a mainboard on a display screen, after the first spring 16 drives the metal probe 14 to move upwards and to be tightly attached to the mainboard on the display screen, the pull rope 23 is in a straightened state, through the structure, the support plate 1 can drive the metal probe 14 to move downwards in the process of rotating downwards to avoid relative movement with the mainboard, when the display screen rotates to a horizontal position, the metal probe 14 gradually moves upwards and is electrically connected with the mainboard, after the test is completed, the positioning bolt 10 is rotated to separate the metal probe from the support column 12, therefore, the support column 12 can be driven to slide upwards under the action of the second spring 26 to drive the support plate 1 and the display screen to rotate upwards to reset, when the support column 12 moves upwards, the connecting column 24 can be driven to move downwards in the direction far away from the sliding sleeve 18 inside the first limiting section 25, so that the pull rope 23 drives the metal probe 35 to move downwards to drive the metal probe 14 to move downwards, therefore, the support plate 1 and the display screen are in an upward rotating state, the metal probe 14 moves downwards to avoid relative movement with the mainboard 14, and the mainboard 14 can be quickly separated from being electrically connected with the mainboard in the display screen, and the mainboard 14, and the mainboard can be quickly, and the mainboard can be prevented from being electrically connected with the mainboard 14 from being separated in the metal probe from being quickly in the test process of the mainboard, and the mainboard 14, and the mainboard can be quickly.

As shown in fig. 1-2 and 9, the clamping assembly includes a baffle plate 6 fixed on the supporting plate 1, an L-shaped clamp plate 5 is disposed on the inner side of the baffle plate 6, a guide shaft 3 is fixedly connected to the outer side of the clamp plate 5, the guide shaft 3 penetrates through the baffle plate 6 and is slidably connected thereto, a locking screw 4 is disposed on the outer side of the baffle plate 6, the locking screw 4 penetrates through the baffle plate 6 and is in threaded connection therewith, and one end of the locking screw 4 close to the clamp plate 5 is rotatably connected therewith through a bearing.

In the actual use process, the clamping plate 5 can be driven to move towards the display screen by rotating the locking screw rod 4, so that the display screen is clamped on the supporting plate 1, and the test is carried out on the display screen.

A transverse plate is fixedly connected between the two support legs 7, and a transverse beam is fixedly connected between the inner side surface of the transverse plate and the sliding sleeve 18 so as to fix the sliding sleeve 18.

Claims

1. The utility model provides a subassembly testing arrangement for liquid crystal display, includes the bottom plate and rotates the backup pad that sets up in the bottom plate top, and backup pad one side is provided with the support, be provided with the light source on the support bottom surface, the bottom of backup pad is provided with metal probe, its characterized in that: the top of the bottom plate is connected with a support column in a sliding manner;

2. The device for testing a component for a liquid crystal display panel according to claim 1, wherein: the adjusting part comprises a sliding plate fixedly connected to the inner side of the pillar, a limiting rod is arranged on the outer side of the sliding plate, a sliding groove is formed in the inner side face of the sliding plate, a sliding block is connected to the inside of the sliding groove in a sliding mode, a connecting column is connected to one side face, close to the limiting rod, of the sliding block in a rotating mode, a first limiting section, a second limiting section and a third limiting section which are communicated with one another are arranged on the limiting rod, the second limiting section is arranged between the first limiting section and the third limiting section, and the second limiting section is arranged to be arc-shaped and is located at a position, far away from the sliding sleeve, relative to the first limiting section and the third limiting section.

3. The device for testing a component for a liquid crystal display panel according to claim 2, characterized in that: the inside sliding connection of sliding sleeve has sealed dish, the metal probe extends to the inside one end of sliding sleeve and sealed dish fixed connection, the bottom of sealed dish is provided with the stay cord, the one end of stay cord and the bottom surface fixed connection who seals the dish, the other end of stay cord wear out the sliding sleeve and with spliced pole fixed connection, the bottom of sliding sleeve is provided with the pulley, walk around from the outside of pulley when the stay cord passes the sliding sleeve bottom.

4. The device for testing a component for a liquid crystal display panel according to claim 1, wherein: the outside of sliding sleeve is provided with intake pipe and blast pipe, the aperture of blast pipe is greater than the aperture of intake pipe, be provided with the first check valve that supplies outside gas one-way entering to the sliding sleeve inside in the intake pipe, be provided with the second check valve that supplies the inside gas one-way exhaust of sliding sleeve on the blast pipe.

5. The device for testing a component for a liquid crystal display panel according to claim 1, wherein: the fixed column that is provided with in bottom plate top, the fixed column sets up to the U type, the bar groove that link up has all been seted up to the both sides face of fixed column, fixedly connected with and bar groove matched with lug on the both sides face of pillar, fixedly connected with montant on the inside bottom surface of fixed column, the montant penetrates the inside of fixed column and rather than sliding connection, the outside cover of montant is equipped with the second spring, the second spring sets up between the inside bottom surface of fixed column and pillar.

6. The device for testing a component for a liquid crystal display panel according to claim 1, wherein: the top fixedly connected with locating component of bottom plate, locating component includes fixed connection in the locating plate at bottom plate top, threaded connection has positioning bolt on the locating plate, fixedly connected with locating piece on the lateral surface of pillar, set up on the lateral surface of pillar with positioning bolt matched with locating hole.

7. The device for testing a component for a liquid crystal display panel according to claim 1, wherein: the top of backup pad is provided with the centre gripping subassembly, the centre gripping subassembly is including fixing the baffle in the backup pad, the inboard of baffle is provided with the splint of L type, the outside fixedly connected with guiding axle of splint, the guiding axle run through the baffle and rather than sliding connection, the outside of baffle is provided with locking screw, locking screw passes the baffle and rather than threaded connection, locking screw is close to the one end of splint and passes through the bearing rather than rotate and be connected.

8. The device for testing a component for a liquid crystal display panel according to claim 1, wherein: one side of keeping away from the support bottom the backup pad is provided with the supporting leg, fixedly connected with cross axle between two supporting legs, the cross axle runs through the backup pad and is connected rather than rotating, one side that the support was kept away from at the top of backup pad is provided with the blend stop.

9. The device for testing a component for a liquid crystal display panel according to claim 3, wherein: the fixed frame is installed in the outside of pulley, fixed frame top fixedly connected with circle axle, the bottom rotation of circle axle and sliding sleeve is connected.

10. A test method using the device for testing a component for a liquid crystal display panel according to any one of claims 1 to 9, comprising the steps of: