CN203811937U - a test fixture - Google Patents

Abstract

The utility model relates to the technical field of display, in particular to a test fixture. The test fixture comprises a pressure connection mechanism, an eccentric mechanism, an operation load platform, a first regulating mechanism and a second regulating mechanism. The eccentric mechanism drives the pressure connection mechanism to move along the Y-direction, the pressure connection mechanism is oppositely arranged with the operation load platform and is used for performing signal pressure connection test on a product to be tested on the operation load platform, the first regulating mechanism controls and regulates the operation load platform to move along the X-direction, and the second regulating mechanism controls and regulates to operation load platform to move along the Y-direction; the test fixture provides a connection channel between a COG (chip on glass) status product and a test machine after an LCD (liquid crystal display) is bound with an IC (integrated circuit) , so that test signals of the test machine can be transmitted to a signal port corresponding to the tested product, the status of a finished LCD module is simulated and used for testing of products in the development stage or sorting defective products in mass production; the test fixture is simple in structure, stable in performance, easy to use and operate and convenient and rapid to maintain.

Description

a test fixture

technical field

The utility model relates to the field of display technology, in particular to a test fixture.

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 COG (English name is Chip On Glass) after the LCD is bound to IC (English name is Integrated Circuit, Chinese name is integrated circuit). , the Chinese name is the testing work of products in the state of mounting chips on the display screen).

The role of this auxiliary tool is to provide a connection channel between the COG state product and the test signal machine after the LCD is bound to the IC, so that the signal tested by the test signal machine can be transmitted to the corresponding signal port of the COG state product, and simulate the LCD. Assembled the status of the finished product, used for inspection during the product development phase or for sorting defective products for high-volume production. The structural stability of the auxiliary tools in the prior art is poor, the number of assemblies is large, and the operation is inconvenient; and the daily maintenance is difficult and the maintenance cost is high; the existing auxiliary tools do not have guide rails and guide sliders that enhance stability and crimping precision structure, so the accuracy of the test is low; at the same time, the adjustment of the work platform is inconvenient, and the daily maintenance process is inconvenient.

Therefore, in view of the above deficiencies, there is a need for a test fixture that can test products in the COG state after the LCD is bound to an IC, and has a simple structure, stable performance, easy operation, and convenient maintenance.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to provide a test fixture, which can test the COG state products after the LCD is bound with an IC, and has a simple structure, stable performance, easy operation, and convenient maintenance.

(2) Technical solutions

In order to solve the above technical problems, the utility model provides a test fixture, including a crimping mechanism, an eccentric mechanism, a work platform, a first adjustment mechanism and a second adjustment mechanism, the eccentric mechanism drives the crimping mechanism along the Y direction move, the crimping mechanism is set corresponding to the work platform, and is used for the signal crimping test of the product under test on the work platform, the first adjustment mechanism controls and adjusts the movement of the work platform in the X direction, and the The second adjustment mechanism controls and adjusts the operation platform to move along the Y direction.

Wherein, the eccentric mechanism includes an eccentric handle, a main eccentric block, a force plate and a guide shaft. shaft, the guide shaft is connected with the crimping mechanism, the eccentric handle is used to drive the main eccentric block to rotate and press down on the force plate, and the force plate drives the crimping mechanism to move along the Y direction through the guide shaft .

Wherein, a bearing plate is arranged above the main eccentric block, a flange bearing is fixed on the bearing plate, and the guide shaft is passed through the flange bearing and connected with the crimping mechanism.

Wherein, an upper spring is sheathed on the guide shaft, and the upper spring is located between the bearing plate and the crimping mechanism.

Wherein, a rolling bearing is provided between the main eccentric block and the force plate.

Wherein, the crimping mechanism includes a main pressure head, a crimping slider and a crimping guide rail, one end of the main pressure head is fixed on the guide shaft, and the other end of the main pressure head is slidably installed on the Crimp on rail.

Wherein, the main pressure head is provided with an auxiliary pressure head, one end of the main pressure head is fixed on the top end of the guide shaft through an adjustment member, and the crimping slider is installed on the other end of the main pressure head through a connecting plate.

Wherein, the first adjustment mechanism includes an X-direction guide rail mounting plate, an X-direction slider installation plate, a guide rail and a guide slider, the X-direction guide rail installation plate is equipped with a guide rail, and the X-direction slider installation plate The guide slider is slidably installed on the guide rail, and is used to drive the operation platform to move along the X direction.

Wherein, the X-direction guide rail mounting plate is fixed below the work platform through a backlight plate, and the work platform is provided with a light-transmitting hole for alignment adjustment.

Wherein, adjusting screws and fastening screws are installed on the X-direction guide rail mounting plate.

Wherein, the second adjustment mechanism includes a Y-direction adjustment platform and a height adjustment side plate, a height adjustment side plate is installed on the Y-direction adjustment platform, and the height adjustment side plate is located below the X-direction guide rail mounting plate, It is used to drive the operation platform to move along the Y direction.

(3) Beneficial effects

The above-mentioned technical solution of the utility model has the following beneficial effects: the eccentric mechanism of the test fixture of the utility model drives the crimping mechanism to move along the Y direction, and the crimping mechanism is set correspondingly to the operation platform for the tested product to be placed on the operation platform To carry out the signal crimping test, the first adjustment mechanism controls and adjusts the operation platform to move in the X direction, and the second adjustment mechanism controls and adjusts the operation platform to move in the Y direction. The test fixture provides a connection channel between the COG state product and the test machine after the LCD is bound to the IC, so that the test signal of the test machine can be transmitted to the corresponding signal port on the test product, and the state of the finished product of the LCD module is simulated. For testing during product development or for sorting defective parts for high-volume production. The test fixture is simple in structure, stable in performance, easy to use and operate, and convenient to maintain.

Description of drawings

Fig. 1 is the perspective view of the test fixture of the utility model embodiment;

Fig. 2 is the structural representation of the eccentric mechanism of the utility model embodiment;

Fig. 3 is a top view of the crimping mechanism of the utility model embodiment;

Fig. 4 is a side view of the crimping mechanism of the utility model embodiment;

Fig. 5 is a side view of the operation platform of the embodiment of the utility model;

Fig. 6 is a schematic front view of the operating platform of the embodiment of the present invention;

Fig. 7 is a top view of the operation platform of the embodiment of the present invention;

Fig. 8 is a schematic diagram of the installation of the operation platform of the embodiment of the utility model;

Fig. 9 is a schematic diagram of the light transmission hole of the embodiment of the present invention.

Among them, 1: crimping mechanism; 2: eccentric mechanism; 3: work platform; 4: first adjustment mechanism; 5: second adjustment mechanism; 7: backlight board; 8: installation backing plate; 11: main pressure head; 12: crimping slider; 13: crimping guide rail; 14: auxiliary pressure head; 21: eccentric handle; 22: main eccentric block; 23: force plate; 24: guide shaft; 25: bearing plate; 31: light transmission Hole; 41: X-direction guide rail mounting plate; 42: X-direction slider mounting plate; 43: guide rail; 44: guide slider; 51: Y-direction adjustment carrier; 52: height adjustment side plate; 111: adjustment piece; 121: connecting plate; 221: rolling bearing; 241: flange bearing; 242: top spring; 411: adjusting screw; 412: fastening screw; 413: occlusal plate.

Detailed ways

The implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

In the description of the present utility model, unless otherwise specified, the meaning of "multiple" 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 accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present 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 the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integratively connected; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

As shown in Figure 1, the test fixture described in this embodiment includes a crimping mechanism 1, an eccentric mechanism 2, a work platform 3, a first adjusting mechanism 4 and a second adjusting mechanism 5, and the eccentric mechanism 2 drives the crimping mechanism 1 Move along the Y direction, the crimping mechanism 1 is set corresponding to the operation platform 3, and is used for the signal crimping test of the tested product on the operation platform 3, the first adjustment mechanism 4 controls and adjusts the operation platform 3 to move in the X direction, The second adjusting mechanism 5 controls and adjusts the operation platform 3 to move along the Y direction. The test fixture provides a connection channel between the COG state product and the test machine after the LCD is bound to the IC, so that the test signal of the test machine can be transmitted to the corresponding signal port on the test product, and the state of the finished product of the LCD module is simulated. For testing during product development or for sorting defective parts for high-volume production.

As shown in FIG. 2 , the eccentric mechanism 2 includes an eccentric handle 21 , a main eccentric block 22 , a force plate 23 and a guide shaft 24 , the main eccentric block 22 is installed on the eccentric handle 21 , and the force plate 23 is located below the main eccentric block 22 , the force plate 23 is equipped with a guide shaft 24, the guide shaft 24 is connected with the crimping mechanism 1, the eccentric handle 21 is used to drive the main eccentric block 22 to rotate and press down on the force plate 23, and the force plate 23 is along the Y The direction moves downward, and the force plate 23 drives the crimping mechanism 1 to move downward along the Y direction through the guide shaft 24, that is, completes the crimping movement downward in the Y direction. A top spring 242 is sheathed on the guide shaft 24, and the top spring 242 is located between the bearing plate 25 and the crimping mechanism 1. After the test is completed, the top spring 242 provides elastic force for the crimping mechanism 1 to move upward.

A bearing plate 25 is arranged above the main eccentric block 22 , and a flange bearing 241 is fixed on the bearing plate 25 . The guide shaft 24 passes through the flange bearing 241 and is connected with the crimping mechanism 1 . Through the guiding effect of the flange bearing 241 , the crimping mechanism 1 can move up and down accurately and smoothly.

The test fixture adopts the eccentric mechanism 2 as the main body movement mechanical structure of the crimping mechanism 1, so that the rotational movement of the eccentric handle 21 is converted into the vertical up and down movement of the crimping mechanism 1 above the bearing plate 25, and provides the necessary parameters for the crimping mechanism 1 during the test. The driving force for the desired downward movement and the upward movement to return to the original position after the test is completed. The overall structure is simple, the performance is stable, easy to use and operate, and convenient to maintain.

In addition, compared with the existing structure of installing eccentric blocks on both sides of the eccentric handle 21 , the test fixture installs the main eccentric block 22 in the middle of the eccentric handle 21 , which has higher eccentric stability. Moreover, the size of the main eccentric block 22 is increased, from the original 10 mm wide to 50 mm wide, so that the main eccentric block 22 and the eccentric handle 21 are more fully engaged.

Moreover, the shape of the main eccentric block 22 can be designed according to actual needs. The main eccentric block 22 is used in conjunction with the positioning block to locate the position of the main eccentric block 22, thereby realizing the positioning of the crimping mechanism 1 in the Y direction.

Preferably, a rolling bearing 221 is provided between the main eccentric mass 22 and the force plate 23 . The main eccentric block 22 is in contact with the force plate 23 through the rolling bearing 221, and is rolled and driven during the movement process, which reduces the friction coefficient, increases the wear resistance of the contact surface and facilitates the operation.

As shown in Figure 3-4, the crimping mechanism 1 includes a main pressure head 11, a crimping slider 12 and a crimping guide rail 13, one end of the main pressure head 11 is fixed on the guide shaft 24, and the other end of the main pressure head 11 passes through The crimping slider 12 is slidably installed on the crimping guide rail 13 . The main pressure head 11 adopts a special crimping shape, cooperates with the pressure buffer silicone sheet, test PCB (English name is Printed CircuitBoard, Chinese name is printed circuit board) and test FPC (English name is FlexiblePrinted Circuit, Chinese name is flexible printing circuit board) to make smooth and precise contact and stable crimping between the signal source required for testing and the product under test.

Among them, the main pressure head 11 is provided with an auxiliary pressure head 14 for FPC installation, one end of the main pressure head 11 can be fixed on the top of the guide shaft 24 through the adjustment piece 111, and the crimping slider 12 is installed on the main pressure head through the connecting plate 121. the other end of head 11. The adjustment member 111 is used to adjust the pressure of the main pressure head 11, and can be adjusted by adjusting copper nails. Adjust the external thread of the copper nail to correspond to the threaded hole on the guide shaft 24, adjust the copper nail by hand to control the height difference between the main pressure head 11 and the product under test, so as to realize the adjustment of the crimping pressure value during the crimping test .

This way of cooperating between the crimping slider 12 and the crimping guide rail 13 increases the guiding precision and ensures the crimping accuracy of the main pressure head 11 . At the same time, the main material is made of Bakelite, which can effectively prevent static electricity from harming electronic products.

In order to reduce the difficulty and cost of daily maintenance, the test fixture adopts the standardization of daily maintenance items and the installation of a modular sliding table mechanism. It has versatility, and the addition of alignment adjustment makes daily maintenance more convenient.

As shown in Figure 5, the first adjustment mechanism 4 includes the X direction guide rail mounting plate 41, the X direction slider mounting plate 42, the guide rail 43 and the guide slider 44, and the X direction guide rail mounting plate 41 is equipped with the guide rail 43, X The direction slider mounting plate 42 is slidably installed on the guide rail 43 through the guide slider 44, and is used to drive the operation platform 3 to move in the X direction. A guide rail 43 and a guide slider 44 are added to the first adjustment mechanism 4 to make the adjustment of the work platform 3 more convenient and more stable.

The second adjustment mechanism 5 includes a Y direction adjustment platform 51 and a height adjustment side plate 52. A height adjustment side plate 52 is installed on the Y direction adjustment platform 51. The height adjustment side plate 52 is located below the X direction guide rail mounting plate 41. It drives the operation platform 3 to move in the Y direction.

Wherein, an installation backing plate 8 is added between the height adjusting side plate 52 and the X-direction rail mounting plate 41 for connecting the height adjusting side plate 52 and the X-direction rail mounting plate 41 .

As shown in FIGS. 6-7 , an adjusting screw 411 and a fastening screw 412 are installed on the X-direction rail mounting plate 41 . The precise adjustment of the operating platform 3 in the X direction is achieved by manually screwing the adjusting screw 411 ; the reciprocating movement of the operating platform 3 in the X direction is controlled by the pull-back structure of the tension spring. Moreover, the fixation and adjustment of the work platform 3 in the X direction can be realized by tightening the fastening screws 412 with hands and matching the stainless steel occlusal plate 413, which makes daily maintenance more convenient.

The Y-direction adjustment stage 51 adopts the matching installation structure of positioning pins and U-shaped slot holes, which can be adjusted by thumb screws to enhance its operability and guiding stability. Screw adjustment can also be used for fixed adjustment, which is easy to maintain high.

As shown in Figures 8-9, the X-direction guide rail mounting plate 41 is fixed below the work platform 3 through the backlight plate 7, and the work platform 3 is provided with a light-transmitting hole 31 for alignment adjustment. The light transmission hole 31 cooperates with the backlight panel 7, which is convenient for observing the alignment terminal, and the adjustment process is more convenient. The modular standardized design improves the stability and ease of operation of the test fixture; moreover, it reduces the number of assemblies and simplifies the manufacturing steps.

To sum up, the eccentric mechanism of the test fixture of the utility model drives the crimping mechanism to move along the Y direction, and the crimping mechanism is set correspondingly to the operation platform, which is used for the signal crimping test of the tested product on the operation platform. An adjustment mechanism controls and adjusts the operation platform to move along the X direction, and a second adjustment mechanism controls and adjusts the operation platform to move along the Y direction. The test fixture provides a connection channel between the COG state product and the test machine after the LCD is bound to the IC, so that the test signal of the test machine can be transmitted to the corresponding signal port on the test product, and the state of the finished product of the LCD module is simulated. For testing during product development or for sorting defective parts for high-volume production. The test fixture is simple in structure, stable in performance, easy to use and operate, and convenient to maintain.

The embodiments of the invention have been presented for purposes of illustration and description, but are not intended to be exhaustive or to limit the invention to the forms 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 principle and practical application of the invention, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for particular purposes.

Claims (11)

1. A test fixture is characterized in that it comprises a crimping mechanism (1), an eccentric mechanism (2), an operating platform (3), a first regulating mechanism (4) and a second regulating mechanism (5), so The eccentric mechanism (2) drives the crimping mechanism (1) to move along the Y direction, and the crimping mechanism (1) is set correspondingly to the operation platform (3), and is used for testing the product on the operation platform (3). Signal crimping test, the first adjustment mechanism (4) controls and adjusts the operation platform (3) to move along the X direction, and the second adjustment mechanism (5) controls and adjusts the operation platform (3) to move along the Y direction direction to move. 2. The test fixture according to claim 1, characterized in that, the eccentric mechanism (2) includes an eccentric handle (21), a main eccentric block (22), a force plate (23) and a guide shaft (24) , the main eccentric block (22) is installed on the eccentric handle (21), the force plate (23) is located below the main eccentric block (22), and the force plate (23) is equipped with a guide shaft (24), The guide shaft (24) is connected with the crimping mechanism (1), the eccentric handle (21) is used to drive the main eccentric block (22) to rotate and press down on the force plate (23), the The force plate (23) drives the crimping mechanism (1) to move along the Y direction through the guide shaft (24). 3. The test fixture according to claim 2, wherein a bearing plate (25) is arranged above the main eccentric block (22), and a flange bearing (241) is fixed on the bearing plate (25). ), the guide shaft (24) passes through the flange bearing (241) and is connected with the crimping mechanism (1). 4. The test fixture according to claim 3, characterized in that an upper top spring (242) is sheathed on the guide shaft (24), and the upper top spring (242) is located on the bearing plate (25 ) and the crimping mechanism (1). 5. The test fixture according to claim 3, characterized in that a rolling bearing (221) is provided between the main eccentric mass (22) and the force plate (23). 6. The test fixture according to claim 3, characterized in that, the crimping mechanism (1) comprises a main pressure head (11), a crimping slider (12) and a crimping guide rail (13), the One end of the main ram (11) is fixed on the guide shaft (24), and the other end of the main ram (11) is slidably installed on the crimping guide rail (13) through the crimping slider (12). 7. The test fixture according to claim 6, characterized in that, the main indenter (11) is provided with an auxiliary indenter (14), and one end of the main indenter (11) passes through the adjustment member (111 ) is fixed on the top of the guide shaft (24), and the crimping slider (12) is installed on the other end of the main pressure head (11) through the connecting plate (121). 8. The test fixture according to claim 1, characterized in that, the first adjustment mechanism (4) comprises an X direction guide rail mounting plate (41), an X direction slider mounting plate (42), a guide rail (43 ) and a guide slider (44), a guide rail (43) is installed on the X-direction guide rail mounting plate (41), and the X-direction slider installation plate (42) is slidably installed on the guide slider (44) On the guide rail (43), it is used to drive the operation platform (3) to move along the X direction. 9. The test fixture according to claim 8, characterized in that, the X-direction guide rail mounting plate (41) is fixed below the operating platform (3) through a backlight panel (7), and the operating platform The table (3) is provided with a light-transmitting hole (31) for alignment adjustment. 10. The test fixture according to claim 9, characterized in that, an adjusting screw (411) and a fastening screw (412) are installed on the X-direction guide rail mounting plate (41). 11. The test fixture according to claim 1, characterized in that, the second adjustment mechanism (5) comprises a Y-direction adjustment stage (51) and a height adjustment side plate (52), and the Y-direction adjustment stage (52) A height adjustment side plate (52) is installed on the table (51), and the height adjustment side plate (52) is located below the X direction guide rail mounting plate (41), and is used to drive the operation platform (3) along the Y direction move.