CN105841727A - Test jig - Google Patents

Abstract

The invention discloses a test fixture, comprising a base, a bearing plate for placing a board to be tested and a distance sensor, the bearing plate is arranged on the base, and the distance sensor is fixed on the bearing plate or the The base is located under the opposite sides of the board to be tested. By setting the distance sensors below the opposite sides of the board to be tested, the distance between the opposite sides of the board to be tested and the distance sensors below them can be detected, and whether the board to be tested can be known according to the deviation of the distance tilt.

Description

a test fixture

technical field

The invention relates to the detection field, in particular to a test fixture.

Background technique

At present, when the test fixture tests the performance of the board to be tested, the board to be tested is generally placed on the carrier board manually, and then the test is started. During the operation, the operator sometimes starts the test without laying the board to be tested flat, causing the pressure plate of the test fixture to crush the board to be tested that is not yet ready.

Contents of the invention

The object of the present invention is to provide a test fixture, which can detect whether the board to be tested is tilted, and prevent the board to be tested from being crushed because it is not ready.

A test fixture, comprising a base, a bearing plate for placing a board to be tested, and a distance sensor, the bearing plate is arranged on the base, the distance sensor is fixed on the bearing plate or the base, and is located at underneath the opposite sides of the board to be tested.

Wherein, the distance sensor is a metal sensor, an optical fiber sensor, an infrared ranging sensor or an ultrasonic sensor.

Wherein, it also includes an upper cover, a driving device, and a pressing plate, the driving device and the pressing plate are located in the upper cover, the upper cover is fixed with the base, and the driving device is used to drive the pressing plate to press down. Board to be tested.

Wherein, the driving device is connected to the pressing plate through a pressing plate guide post, and a floating gap is provided between the pressing plate and the pressing plate guiding post along the axial direction of the pressing plate guiding post.

Wherein, it also includes a test module, the test module is located under the bearing plate, and is detachably connected to the bearing plate, the pressure plate is detachably connected to the driving device, and the bearing plate is connected to the base Detachable connection.

Wherein, one end of the upper cover is hinged to the base, and the other end is fixedly connected by a locking device.

Wherein, the above includes an upper lock portion and a lower lock portion that are engaged with each other, the upper lock portion is fixed to the lower portion of the upper cover, the lower lock portion is fixed to the upper portion of the base, and the upper lock portion The upper end is fixed with a cylinder.

Wherein, the bearing plate and the base are connected through a base guide column, the bearing plate and the base can slide along the axial direction of the base guide column, and the bearing plate and the base are provided with There are springs.

Wherein, the middle part of the bearing plate is sunken to form a bearing portion for placing the board to be tested, and the edge of the bearing portion is vertically provided with a clamping post corresponding to the clamping groove of the board to be tested.

Wherein, a detection hole is provided on the edge of the bearing part, and the distance sensor is fixed on the base and located below the detection hole.

Beneficial effects: the present invention provides a test fixture, including a base, a bearing plate for placing a board to be tested and a distance sensor, the bearing plate is arranged on the base, and the distance sensor is fixed on the bearing plate or the base, and is located under the opposite sides of the board to be tested. By setting the distance sensors below the opposite sides of the board to be tested, the distance between the opposite sides of the board to be tested and the distance sensors below them can be detected, and whether the board to be tested can be known according to the deviation of the distance tilt.

Description of drawings

FIG. 1 is a schematic diagram of the structure of the test fixture of the present invention after it is opened.

Fig. 2 is a cross-sectional view of the test fixture of the present invention after it is closed.

FIG. 3 is an assembly diagram of the bearing board and the board to be tested of the test fixture of the present invention.

FIG. 4 is an exploded view of the carrying board and the board to be tested of the test fixture of the present invention.

FIG. 5 is a partial enlarged view of A in FIG. 4 .

in:

1-base, 11-base guide column, 2-loading plate, 21-loading part, 22-locking column, 23-detection hole, 3-distance sensor, 4-top cover, 5-driving device, 6-press plate, 61-press plate guide column, 7-test module, 81-upper lock part, 82-lower lock part.

detailed description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Example 1

With reference to Fig. 3 to Fig. 5, the present invention provides a kind of test fixture, comprises base 1, the bearing plate 2 that is used to place the board to be tested and distance sensor 3, and bearing plate 2 is arranged on the base 1, and distance sensor 3 is fixed on The base 1 is located under the opposite sides of the board to be tested. By setting the distance sensors 3 below the opposite sides of the board to be tested, the distance between the opposite sides of the board to be tested and the distance sensors 3 below them can be detected, and the distance to be tested can be known according to the deviation of the distance. Whether the board is tilted. Specifically, the distance sensor 3 transmits the detected data to the controller, and the controller compares the difference between the detected data and the set data, or judges whether the difference between the distances of the two sensors exceeds a preset value, Determine whether the loading plate is tilted, and then take corresponding actions, such as issuing an alarm to remind the operator, or displaying a warning message, or controlling other components to not move until the loading plate is placed flat again.

The middle part of the bearing plate 2 is sunken to form a bearing portion 21 for placing the board to be tested, and the edge of the bearing portion 21 is vertically provided with a clamping column 22 corresponding to the clamping groove of the board to be tested. The shape of the bearing part 21 is adapted to the board to be tested. The board to be tested is put into the bearing part 21, and the board to be tested is limited in place, and the clamping post 22 cooperates with the slot of the board to be tested to further limit the board to be tested. bit. The edge of the carrying part 21 is provided with a detection hole 23. The distance sensor 3 is fixed on the base 1 and is located below the detection hole 23. The distance sensor 3 detects the distance of the board to be tested through the detection hole 23, and the carrying plate 2 can protect its lower part. The distance sensor 3. There are no restrictions on the three types of distance sensors, which can be metal sensors, optical fiber sensors, infrared ranging sensors or ultrasonic sensors, as long as the distance between the board to be tested and the sensor can be detected.

Referring to Fig. 1 and Fig. 2, the test fixture also includes an upper cover 4, a driving device 5, and a pressing plate 6, the driving device 5 and the pressing plate 6 are located in the upper cover 4, the upper cover 4 is fixed with the base 1, and the driving device 5 drives the pressing plate 6 Press down on the board to be tested. The driving device 5 and the pressing plate 6 are connected through the pressing plate guiding post 61 , and a floating gap is provided between the pressing plate 6 and the pressing plate guiding post 61 along the axial direction of the pressing plate guiding post 61 . If a hard connection is adopted between the pressing plate 6 and the pressing plate guide column 61, the plate to be tested may be subjected to uneven force during the pressing down process of the pressing plate 6 and may be easily deformed and damaged. Therefore, between the pressing plate 6 and the pressing plate guiding column 61 The axial direction of the guide column 61 is provided with a floating gap, which allows the pressure plate 6 to be slightly adjusted when it touches the plate to be tested when the pressure plate 6 is pressed down, so that the force on the entire plate to be tested is more uniform and not easily deformed damaged.

One end of the upper cover 4 is hinged to the base 1, and the other end is fixedly connected by a locking device. The locking device includes an upper locking part 81 and a lower locking part 82 which are engaged with each other. The upper locking part 81 is fixed on the bottom of the loam cake 4, the lower locking part 82 is fixed on the top of the base 1, and the upper end of the upper locking part 81 is fixed with a cylinder. After the control device confirms that the board to be tested is placed flat and ready, it controls the movement of the cylinder to fasten the upper locking part 81 and the lower locking part 82 to fix the upper cover 4 and the base 1 .

The test module 7 of the test fixture is located under the bearing plate 2 and is detachably connected to the bearing plate 2 , the pressure plate 6 is detachably connected to the driving device 5 , and the bearing plate 2 is detachably connected to the base 1 . The above parts are detachable and connected. When testing different boards to be tested, only the corresponding pressure plate 6, test module 7 and bearing plate 2 need to be replaced, and the rest of the test fixture does not need to be replaced, which improves the universality of the test fixture. sex.

The bearing plate 2 and the base 1 are connected by the base guide column 11, the bearing plate 2 and the base 1 can slide along the axial direction of the base guide column 11, a spring is arranged between the bearing plate 2 and the base 1, and the pressing distance of the pressing plate is placed If it is too large, it will cause damage to the carrier board 2 and the board to be tested.

Example 2

Different from Embodiment 1, the distance sensor 3 of the test fixture is directly fixed on the carrier board 2 and is located under the opposite two sides of the board to be tested. Compared with Embodiment 1, there is no need to set a detection hole on the carrier plate 2, the structure is simple, and after the plate to be measured is placed on the carrier portion 23, the distance between the plate to be measured and the distance sensor is stable and will not change with time. Changes with the movement of the carrier plate 2.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (10)

1. a measurement jig, it is characterised in that include base (1), for placing the loading plate of board under test (2) and range sensor (3), described loading plate (2) is arranged on described base (1), described distance Sensor (3) is fixed on described loading plate (2) or described base (1), and is positioned at the phase of described board under test To the lower section of both sides.

2. measurement jig as claimed in claim 1, it is characterised in that described range sensor (3) is gold Belong to sensor, Fibre Optical Sensor, infrared distance measuring sensor or ultrasonic sensor.

3. measurement jig as claimed in claim 1, it is characterised in that also include upper cover (4), drive dress Put (5) and pressing plate (6), described driving means (5) and described pressing plate (6) and be positioned at described upper cover (4) In, described upper cover (4) coordinates fixing with described base (1), and described driving means (5) is used for driving institute State pressing plate (6) and press board under test down.

4. measurement jig as claimed in claim 3, it is characterised in that described driving means (5) is with described Pressing plate (6) is connected by pressing plate lead (61), and described pressing plate (6) and described pressing plate lead (61) Between the axial direction of described pressing plate lead (61) is provided with flying height.

5. measurement jig as claimed in claim 3, it is characterised in that also include testing module (7), institute State test module (7) and be positioned at described loading plate (2) lower section, and removably connect with described loading plate (2), Described pressing plate (6) removably connects with described driving means (5), described loading plate (2) and described base (1) removably connect.

6. measurement jig as claimed in claim 3, it is characterised in that described upper cover (4) and described base (1) one end is hinged, and the other end connects by locking device is fixing.

7. measurement jig as claimed in claim 6, it is characterised in that include the upper lock section (81) mutually fastened With lower lock section (82), described upper lock section (81) is fixed on the bottom of described upper cover (4), described lower lock section (82) being fixed on the top of described base (1), the upper end of described upper lock section (81) is fixed with cylinder.

8. measurement jig as claimed in claim 1, it is characterised in that described loading plate (2) and the described end Seat (1) is connected by base guide post (11), can between described loading plate (2) and described base (1) Axial direction along described base guide post (11) slides, described loading plate (2) and described base (1) Between be provided with spring.

9. measurement jig as claimed in claim 1, it is characterised in that the middle subordinate of described loading plate (2) Fall into and formed for placing the supporting part (21) of board under test, the edge-perpendicular of described supporting part (21) be provided with The screens post (22) that the screens groove of board under test is corresponding.

10. measurement jig as claimed in claim 9, it is characterised in that the edge of described supporting part (21) Being provided with detection hole (23), described range sensor (3) is fixed on described base (1), is positioned at described inspection The lower section of gaging hole (23).