CN104516132B - A kind of measurement jig - Google Patents

Abstract

The invention relates to the field of display technology, in particular to a test fixture. The test fixture includes a base, a signal source, a working platform and a crimping mechanism; the base is provided with an inclined surface for carrying the working platform and the crimping mechanism; the signal source is located on the base; the crimping The mechanism is used to apply the test signal sent by the signal source to the product to be tested; the working platform performs a lighting test on the product to be tested. The test fixture can effectively complete the lighting test of the product to be tested. Through the integrated design of the base, signal source, work platform and crimping mechanism, it is convenient for management and maintenance; The inclined surface of the stage and crimping mechanism makes it have a better inspection angle, which is convenient for operation and production.

Description

a test fixture

technical field

The present invention relates to the field of display technology, in particular to a test fixture, and more specifically to a test fixture with a better detection viewing angle and convenient installation and maintenance.

Background technique

At present, LCD (English name is Liquid Crystal Display, Chinese name is liquid crystal display) has been widely used in production and life due to its technical advantages. In the LCD production process, it is often necessary to use an auxiliary tool to cooperate with the test signal machine to complete the LCD test. This auxiliary tool can provide a signal connection between the LCD and the test signal machine, connect the test point of the signal source to the corresponding test point of the product to be tested, and complete the detection of the product to be tested in the lighting state.

There are many defects in the application of existing test fixtures: first, the fixture itself and the signal source are set separately, and the two must be connected through an external cable when used. In this way, the overall equipment placement will be messy at the operation site, which is not conducive to workshop operation and unified management; moreover, under normal circumstances, the fixture is only operated on the horizontal plane during the signal test, which cannot provide a better detection angle of view. It is conducive to rapid production; secondly, the polarizer on the fixture is usually directly attached to the surface of the carrier with an acrylic plate, which not only leads to low light transmittance of the polarizer, but also easily causes serious scratches, which greatly increases the cost of replacement. Frequency and missed detection rate; at the same time, the fixture carrier and the backlight are usually integrated, that is, the backlight is directly fixed in the backlight groove behind the carrier, which is not convenient for cleaning and maintenance of the backlight; in addition, the fixture on the pressure head There is no avoidance at the installation end of the probe, which will cause damage to non-test points when the indenter is reciprocating, causing unnecessary damage.

Therefore, in view of the above deficiencies, there is a need for a test fixture that can effectively perform a lighting test on the product to be tested, is convenient for integrated operation, has a better detection angle of view, and is convenient for installation and maintenance.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the present invention is to provide a test fixture, which can effectively conduct a lighting test on the product to be tested, is convenient for integrated operation, has a better detection angle, and is convenient for installation and maintenance.

(2) Technical solution

In order to solve the above technical problems, the present invention provides a test fixture, which includes a base, a signal source, a working platform and a crimping mechanism; the base is provided with an inclined surface for carrying the working platform and the crimping mechanism; The signal source is located on the base; the crimping mechanism is used to apply the test signal sent by the signal source to the product to be tested; the work platform performs a lighting test on the product to be tested.

Wherein, an overturning unit is provided above the work platform, and one side of the overturn unit is rotatably connected with the work platform; a backlight mounting plate is provided under the work platform, and the backlight installation plate is connected to the work platform. The stage is detachably connected; the product to be tested is set on the work stage and is located between the turning unit and the backlight mounting plate; the first polarizer is fixed on the turning unit; the backlight is fixed on the backlight mounting plate , a second polarizer is fixed on the backlight.

Wherein, the turnover unit includes a rotating frame, a hinge and a fixed plate, one side of the rotating frame is installed on the work platform through the hinge; the fixed plate clamps the first polarizer on the Turn the box on.

Wherein, the backlight mounting plate is provided with a first positioning column, and the working platform is provided with a mounting hole, and the first positioning column is located in the mounting hole.

Wherein, the working stage and the backlight installation plate are connected through magnetic components.

Wherein, the work platform is provided with a fourth positioning column for limiting the product to be tested.

Wherein, a horizontal adjustment plate, a longitudinal adjustment plate and a bottom plate are sequentially provided below the backlight mounting plate; a circuit board for driving the backlight is arranged on the horizontal adjustment plate; the bottom plate is fixed on On the inclined surface, the longitudinal adjustment plate moves along the Y direction, and the horizontal adjustment plate moves along the X direction.

Wherein, the horizontal adjustment plate is provided with a transverse groove, and the longitudinal adjustment plate is provided with a second positioning column, and the second positioning column is located in the transverse groove; the longitudinal adjustment plate is provided with a longitudinal groove, and the A third positioning column is arranged on the bottom plate, and the third positioning column is located in the longitudinal groove.

Wherein, the crimping mechanism includes a drive unit and a pressure head; the drive unit drives the pressure head to move along the Z direction; one end of the pressure head is provided with a protrusion, and a plurality of probes are pierced on the protrusion. ; One end of the probe is electrically connected to the signal source, and the other end is contacted and connected to the test point of the product under test.

Wherein, the drive unit includes a frame, a rotating handle, an eccentric block, a bearing plate and an elastic component; the frame is located on an inclined surface, and a guide shaft is arranged in the frame; the elastic component and the bearing plate are both sleeved on the guide shaft above, and the elastic part is located below the bearing plate; the pressure head is fixedly connected to one side of the bearing plate; the eccentric block is located above the bearing plate; the rotating handle drives the eccentric block to press fit on the bearing plate Above; the bearing plate moves along the axial direction of the guide shaft under the action of the eccentric block.

Wherein, a control button is connected to the signal source, and the control button is used to switch the test signal sent by the signal source.

Wherein, the signal source is fixed inside the base through the signal source mounting plate; the control buttons are located on the side plate of the base.

Wherein, the included angle between the inclined surface and the horizontal plane is 40°-50°.

(3) Beneficial effects

The above-mentioned technical solution of the present invention has the following beneficial effects: the test fixture provided by the present invention can effectively complete the lighting test of the product to be tested, and through the integrated design of the base, signal source, work platform and crimping mechanism, it is convenient for management and maintenance; moreover, the base is also equipped with an inclined surface for carrying the work platform and the crimping mechanism, so that it has a better inspection angle, thereby facilitating operation and production.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the test fixture of the embodiment of the present invention;

Fig. 2 is the structural representation of the indenter of the embodiment of the present invention;

Fig. 3 is the side view of the indenter of the embodiment of the present invention;

FIG. 4 is a schematic structural view of a working platform according to an embodiment of the present invention;

5 is a schematic structural view of a backlight mounting plate according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a lateral adjustment plate according to an embodiment of the present invention;

Fig. 7 is a schematic structural view of a longitudinal adjustment plate according to an embodiment of the present invention;

Fig. 8 is a schematic diagram of the assembly of the bottom plate of the embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a folding unit according to an embodiment of the present invention;

Fig. 10 is a schematic structural view of the base of the embodiment of the present invention;

11 is a schematic structural diagram of a signal source mounting board according to an embodiment of the present invention;

Fig. 12 is a side view of the base of the embodiment of the present invention;

Fig. 13 is a schematic structural diagram of a crimping mechanism according to an embodiment of the present invention.

Among them, 1: base; 2: signal source; 3: work platform; 4: crimping mechanism; 5: turning unit; 6: backlight mounting plate; 7: horizontal adjustment plate; 8: vertical adjustment plate; 9: bottom plate; 11: first positioning column; 12: second positioning column; 13: third positioning column; 14: fourth positioning column; 21: control button; 22: signal source mounting plate; 31: mounting hole; 32: magnetic component; 33: positioning groove; 41: pressure head; 42: frame; 43: rotating handle; 44: eccentric block; 45: bearing plate; 46: elastic component; 47: guide shaft; 51: rotating frame; 52: hinge; 53 : fixed plate; 71: horizontal slot; 72: drive circuit board installation slot; 81: longitudinal slot; 411: protrusion; 412: probe.

Detailed ways

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In addition, in the description of the present invention, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, It can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

As shown in Figure 1, the test fixture provided by this embodiment includes a base 1, a signal source 2, a working platform 3 and a crimping mechanism 4; The angle between the inclined surface and the horizontal can be flexibly adjusted according to the needs, for example: the angle can be 40°-50°, with 45° being the optimal choice, the purpose of which is to provide the staff with the best detection viewing angle. Moreover, by setting the signal source 2 on the base 1, the test signal for detecting the product to be tested can be directly formed through the signal source 2, which is convenient for integrated operation and management; The corresponding setting is used to apply the test signal sent by the signal source 2 to the product under test; at the same time, the working platform 3 can be used to perform a lighting test on the product under test after it is connected to the signal. The test fixture realizes the integrated operation of the whole equipment, has a better detection angle, and is convenient for installation and maintenance.

In order to simulate the lighting state, as shown in Fig. 1, Fig. 4, Fig. 5 and Fig. 9, an overturn unit 5 is provided above the work platform 3, and one side of the overturn unit 5 is connected to the work platform 3 in rotation; A backlight mounting plate 6 is provided below the table 3, and the backlight mounting plate 6 is detachably connected to the work platform 3; the product to be tested is arranged on the work platform 3 and is located between the turning unit 5 and the backlight mounting plate 6, The flip unit 5 is fixed with a first polarizer (upper polarizer), and the first polarizer is positioned above the product to be tested; the backlight mounting plate 6 is fixed with a backlight, and the backlight is fixed with a second polarizer (lower polarizer). ), the second polarizer is located below the product to be tested. The backlight is used to form a stable light source, and the light source is irradiated on the product to be tested through the hollow groove on the working platform 3 .

Specifically, the turning unit 5 includes a rotating frame 51, a hinge 52 and a fixed plate 53. One side of the rotating frame 51 is installed on the work platform 3 through the hinge 52, and the turning action is realized by using the hinge 52, so as to achieve fast installation and The purpose of maintenance; And, also be provided with the draw-in groove for accommodating the first polarizer in the inboard of rotating frame 51, fixed plate 53 clamps the first polarizing sheet on rotating frame 51 by double-layer glass plate, that is: the first After the polarizer is clamped by double-layer transparent glass plates, it is installed in the slot on the rotating frame 51 through the fixing plate 53 . This method of sandwiching a polarizer between two layers of white glass can completely avoid the risk of scratches on the polarizer.

The backlight installation plate 6 is detachably connected to the work platform 3, and the two cooperate in a split mode, which not only facilitates the cleaning of the backlight, but also keeps the upper surface of the backlight at the shortest distance from the product to be tested, so as to achieve the best Detection effect. Of course, there can be many ways of this detachable connection, for example: the backlight mounting plate 6 is provided with a first positioning post 11, the work platform 3 is provided with a mounting hole 31, and the first positioning post 11 is located in the mounting hole 31 ; Or, the working stage 3 and the backlight mounting plate 6 are connected through the magnetic component 32, and they are positioned with each other by the magnetic force of the magnet. Of course, it can also be further optimized, using the positioning column together with the magnetic component 32 to achieve more precise positioning and installation.

Since the product to be tested is located on the work platform 3 during the lighting test, it is also necessary to have a device for accurately positioning the product to be tested on the work platform 3, which is described in one of the preferred ways: on the work platform 3 A plurality of fourth positioning columns 14 are provided, and the plurality of fourth positioning columns 14 cooperate to complete the position limiting function of the product to be tested. Based on the protection of the product to be tested, the fourth positioning column 14 may preferably be made of resin material.

As shown in FIG. 1 , FIG. 6 , FIG. 7 and FIG. 8 , a horizontal adjustment plate 7 , a vertical adjustment plate 8 and a bottom plate 9 are sequentially arranged below the backlight installation plate 6 from top to bottom. The alignment adjustment of the work stage 3 in the X direction is realized through the horizontal adjustment plate 7 , and the alignment adjustment of the work stage 3 in the Y direction is realized through the longitudinal adjustment plate 8 . The adjustment is convenient and beneficial to improving detection efficiency.

Wherein, a drive circuit board mounting groove 72 is provided on the horizontal adjustment plate 7, and the circuit board driving the backlight can be installed in the groove. Moreover, the backlight installation plate 6 and the lateral adjustment plate 7 may also be connected through positioning columns and magnetic components. At the same time, the horizontal adjustment plate 7 can move along the X direction, that is, move along the transverse direction (left and right direction) of the inclined surface; the longitudinal adjustment plate 8 is located below the horizontal adjustment plate 7 and can move along the Y direction, that is, along the longitudinal direction of the inclined surface (front and back direction) move; Base plate 9 is then fixed on the inclined surface.

Wherein, the transverse adjustment plate 7 is provided with a transverse groove 71 (parallel to the X direction), and the longitudinal adjustment plate 8 is provided with a second positioning column 12, and the second positioning column 12 is located in the transverse groove 71, and only needs to place the transverse groove 71 can slide along the second positioning column 12; correspondingly, the longitudinal adjustment plate 8 is provided with a longitudinal groove 81 (parallel to the Y direction), the bottom plate 9 is provided with a third positioning column 13, and the third positioning column 13 is located in the longitudinal groove 81, it is only necessary to slide the longitudinal slot 81 along the third positioning column 13 during use.

It is worth noting that the alignment movement adjustment between the horizontal adjustment plate 7 and the longitudinal adjustment plate 8 is not limited to a specific form, and a corresponding movement method can be designed according to actual needs. In addition to the way of the above-mentioned chute and positioning column for alignment adjustment, it can also be through the way of slider and slide rail; the way of pulley and slideway can also be used.

For the crimping mechanism 4, as shown in FIG. 2, FIG. 3 and FIG. 13, the crimping mechanism 4 includes a drive unit and a pressure head 41; the drive unit drives the pressure head 41 to move along the Z direction, that is, perpendicular to the inclined surface direction; one end of the indenter 41 is provided with a protrusion 411 , and a plurality of probes 412 are pierced on the protrusion 411 . The indenter 41 adopts the protruding design of the probe 412. When testing the product, only the probe 412 is in direct contact with the test point, and the other parts of the indenter 41 will not touch the product surface. crack phenomenon.

One end of the probe 412 is electrically connected to the signal source 2, that is, the probe mounting board is mated with the circuit board corresponding to the test signal; at the same time, the other end of the probe 412 is connected to the test point of the product under test during testing. The probe 412 is preferably a double-ended retractable probe 412. The double-ended retractable probe 412 uses the middle sleeve and the spring to make the two ends of the needle body retractable, so that it has a certain buffering effect when it comes into contact with the product. The product will not be damaged due to excessive pressure.

Furthermore, the drive unit may be of a manual type or an electric type. Explain in one of the ways: the drive unit includes a frame 42, a rotating handle 43, an eccentric block 44, a bearing plate 45 and an elastic member 46; Perpendicular to the inclined surface; the elastic component 46 and the bearing plate 45 are all sleeved on the guide shaft 47, and the elastic component 46 is located under the bearing plate 45. Based on cost considerations, the elastic component 46 can be a spring, and its effect is to make the bearing The plate 45 performs the recovery function; the pressure head 41 is fixedly connected to one side of the bearing plate 45, and can reciprocate together with the bearing plate 45; the eccentric block 44 is located above the bearing plate 45; the rotating handle 43 is used to drive the eccentric block 44 to be pressed together On the bearing plate 45 ; thus the bearing plate 45 moves along the axial direction of the guide shaft 47 under the action of the eccentric block 44 .

In addition, as shown in FIG. 10 , FIG. 11 , and FIG. 12 , a control button 21 is connected to the signal source 2 , and the control button 21 is used to control switching of the test signal sent by the signal source. The signal source 2 is fixed inside the base 1 through the signal source mounting plate 22; the control buttons 21 are located on the side panel of the base 1, so as to achieve the purpose of convenient operation.

Specifically, the indenter 41 is connected to the signal source 2 through a 16-pin cable, and the test signal is transmitted to each probe 412 on the indenter 41; a stable light source is provided for the product to be tested through the backlight, and the backlight Both the source and the folding unit 5 are equipped with upper and lower polarizers, which are used to detect the images of different colors of the product; connect the signal source 2 and the control button 21 through a 2-pin flat cable, and press the rotary handle 43 to complete the probe 412 Contact with the product to be tested, light up the product for detection.

In summary, the test fixture provided by the present invention can effectively complete the lighting test of the product to be tested, and is convenient for management and maintenance through the integrated design of the base, signal source, work platform and crimping mechanism; and, in the base There is also an inclined surface carrying the work platform and the crimping mechanism on the top, so that it has a better inspection angle, which is convenient for operation and production.

The embodiments of the present invention have been presented for purposes of illustration and description, but are not intended to be exhaustive or to limit the invention to the form disclosed. Many modifications and changes will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to better explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention and design various embodiments with various modifications as are suited to the particular use.

Claims (12)

1. a test fixture, is characterized in that, comprises base, signal source, working platform and crimping mechanism; Described base is provided with the inclined surface of bearing described working platform, crimping mechanism; Described signal source It is located on the base; the crimping mechanism is set corresponding to one side of the working platform, and is used to apply the test signal sent by the signal source to the product to be tested; the working platform performs a lighting test on the product to be tested; An overturning unit is provided above the work platform, and the overturn unit includes a rotating frame, a hinge and a fixed plate, and one side of the rotating frame is installed on the working platform through a hinge; The inner side is also provided with a slot for accommodating the first polarizer, and the fixing plate clamps the first polarizer on the rotating frame through the double-layer glass plate. 2. The test fixture according to claim 1, wherein one side of the turning unit is rotatably connected to the work platform; a backlight mounting plate is provided below the work platform, and the backlight mounting plate It is detachably connected with the work platform; the product to be tested is set on the work platform and is located between the turning unit and the backlight mounting plate; the first polarizer is fixed on the turning unit; the backlight mounting plate is fixed with A backlight source, the second polarizer is fixed on the backlight source. 3. The test fixture according to claim 2, wherein the backlight mounting plate is provided with a first positioning column, the work platform is provided with a mounting hole, and the first positioning column is located in the mounting hole Inside. 4 . The test fixture according to claim 2 , wherein the working stage and the backlight mounting plate are connected by magnetic components. 5 . The test fixture according to claim 2 , wherein a fourth positioning column for limiting the product to be tested is provided on the work platform. 6 . 6. The test fixture according to claim 2, characterized in that, a horizontal adjustment plate, a longitudinal adjustment plate and a bottom plate are sequentially arranged under the backlight mounting plate from top to bottom; The circuit board for driving the backlight source; the bottom plate is fixed on the inclined surface, the longitudinal adjustment plate moves along the Y direction, and the horizontal adjustment plate moves along the X direction. 7. The test fixture according to claim 6, characterized in that, the horizontal adjustment plate is provided with a transverse groove, the longitudinal adjustment plate is provided with a second positioning column, and the second positioning column is located in the transverse groove Middle; the longitudinal adjustment plate is provided with a longitudinal groove, and the bottom plate is provided with a third positioning column, and the third positioning column is located in the longitudinal groove. 8. The test fixture according to claim 1, wherein the crimping mechanism comprises a drive unit and a pressure head; the drive unit drives the pressure head to move along the Z direction; one end of the pressure head is provided with There are protrusions, and a plurality of probes are pierced on the protrusions; one end of the probes is electrically connected to the signal source, and the other end is contacted and connected to the test point of the product to be tested. 9. The test fixture according to claim 8, wherein the drive unit comprises a frame, a rotating handle, an eccentric block, a bearing plate, and an elastic member; the frame is located on an inclined surface, and a guide shaft; the elastic part and the bearing plate are sleeved on the guide shaft, and the elastic part is located below the bearing plate; the pressure head is fixedly connected to one side of the bearing plate; the eccentric block is located above the bearing plate; The rotating handle drives the eccentric block to be pressed against the bearing plate; the bearing plate moves along the axial direction of the guide shaft under the action of the eccentric block. 10 . The test fixture according to claim 1 , wherein a control button is connected to the signal source, and the control button is used to switch the test signal sent by the signal source. 11 . 11 . The test fixture according to claim 10 , wherein the signal source is fixed inside the base through a signal source mounting plate; and the control buttons are located on the side plate of the base. 12. The test fixture according to claim 1, wherein the included angle between the inclined surface and the horizontal plane is 40°-50°.