JPH088462Y2 - LCD circuit board inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) A liquid crystal circuit board inspection device according to the present invention conducts a continuity test of a circuit board for energizing liquid crystal used in various display devices and small television screens. Use in case.

(Prior Art) The liquid crystal used in various display devices for small TV screens is
The display can be changed by properly connecting and disconnecting the power to a large number of liquid crystals. To ensure that such a display can be changed, make sure that the circuit board for powering the large number of liquid crystals is correct. It is necessary that they are conducted (not broken) and that adjacent patterns are not short-circuited.

Therefore, conventionally, a defective product (broken or short-circuited) is found by sending the assembled liquid crystal circuit board to an inspection device and inspecting it.

The inspection by the inspection device is carried out by bringing a pair of probes into contact with the terminals of the liquid crystal circuit board and the liquid crystal, and applying a voltage between both probes. If there is no current, it is considered as acceptable (no disconnection or contact failure), and if no current exceeds the specified value, it is rejected (disconnection or contact failure). Further, in the case of performing a short-circuit inspection, the test is passed when no current flows between the two probes, and is rejected when a current flows.

(Problems to be solved by the invention) However, as shown in FIG. 3, the actual liquid crystal circuit board has lead patterns 7 and 7 for connecting to a connector or the like.
Since the pitch P of No. 1 and the pitch p of the circuit patterns 8, 8 are different, the inspection work could not be performed efficiently.

That is, in the case of the conventional inspection apparatus, the relative positions of both the probes and the liquid crystal circuit board that is the object to be inspected are only changed while the relative positions of the pair of probes are fixed. Even if the probe is brought into contact with any of the extraction patterns 7, the other probe may not be brought into contact with any of the circuit patterns 8 and 8.

For this reason, conventionally, by changing the original plate for forming the patterns 7 and 8, the drawing pattern 7 and
The pitch P of 7 and the pitch p of the circuit patterns 8 and 8 are made to coincide with each other, but this is not preferable because it causes an increase in cost due to a change in the connector portion at the time of mounting.

The liquid crystal circuit board inspection apparatus of the present invention eliminates the above-mentioned inconvenience.

(Means for Solving the Problems) A liquid crystal circuit board inspecting device of the present invention includes a moving table on which a liquid crystal circuit board, which is an object to be inspected, is placed and which moves in a horizontal direction, and a moving table which moves above the moving table. A first mounting base that is movably provided in a direction perpendicular to the moving direction of the table, and a fixed-side probe that is supported by the first mounting base and is abuttable on the upper surface of the liquid crystal circuit board; Above the moving table, movably supported in the same direction as the moving table, on the upper surface of a second mounting table provided movably in the same direction as the first mounting table, The differential-side probe is configured to come into contact with the upper surface of the liquid crystal circuit board.

(Operation) In the case of the liquid crystal circuit board inspection device of the present invention configured as described above, the fixed probe and the differential probe are moved by moving the differential probe with respect to the second mounting base. Since the relative position can be adjusted over the moving direction of the moving table, the liquid crystal circuit board can be inspected while the pitch of the drawing pattern of the liquid crystal circuit board and the pitch of the circuit pattern are different. .

(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment.

1 and 2 show an embodiment of the liquid crystal circuit board inspecting device of the present invention. FIG. 1 is a partially cutaway perspective view, and FIG. 2 is a front view showing the entire structure.

A pair of X-direction guide rails 2, 2 parallel to each other are provided on the upper surface of the base 1. The X-direction guide rails 2,
A liquid crystal circuit board 4, which is an object to be inspected, can be placed on the upper surface of a movable table 3 that is horizontally movable along the line 2.

A pair of Y-direction guide rails 5 and 5 are provided above the moving table 3 in a direction perpendicular to the X-direction guide rails 2 and 2. The Y-direction guide rails 5 and 5 are provided.
1st and 2nd mounts 6 that can be moved horizontally along
a and 6b are provided.

A notch 9 is formed in the side edge of each of the mounts 6a and 6b, and the notch 9 and the upper surface of the liquid crystal circuit board 4 placed on the upper surface of the moving table 3 can be aligned with each other.

Then, of the first and second mounting bases 6a, 6b, the fixed side probes 10, 10 supported on the upper surface of the central first mounting base 6a (Fig. 2) are mounted through the cutouts 9. It is hung from the lower surface of 6a and can freely come into contact with the upper surface of the liquid crystal circuit board 4.

On the other hand, the side surface of the support plate 11 fixed to the upper surfaces of the pair of second mounting bases 6b and 6b sandwiching the first mounting base 6a is parallel to the X-direction guide rails 2 and 2. The differential guide rail 12 is fixed, and a differential moving base 13 is movably supported on the differential guide rail 12. The differential side probe 15 is supported on the lower surface of the probe holder 14 fixed to the differential moving table 13. Similarly to the fixed side probe 10, the differential side probe 15 also hangs down from the lower surface of the second mount 6b through the notch 9 formed in the second mount 6b.
The upper surface of the liquid crystal circuit board 4 can be freely contacted.

The differential moving base 13, the moving table 3, and the first and second mounting bases 6a and 6b are connected to the X-direction guide rails 2 and 2 and the Y-direction guide rail 5 by a known feed mechanism such as a ball screw mechanism. 5, or movable along the differential guide rail 12. The fixed-side probes 10, 10 provided on the first mounting base 6a are also manually movable in the front-back direction of FIG. 2 with respect to the second mounting base 6b, if necessary.

The feed mechanisms of the first and second mounting bases 6a and 6b are independent of each other, and the adjoining first and second mounting bases 6a and 6b are adjacent to each other.
By making the distance between the two adjustable, it is possible to inspect liquid crystal circuit boards having different widths (horizontal dimension in FIG. 2). However, when it is not necessary to inspect liquid crystal circuit boards having different width dimensions, the first and second mounting bases 6a and 6b can be moved synchronously, and further, the first and second moving bases 6a can be moved. ,
The 6b may be integrated and fixed above the moving table 3.

In the case of the liquid crystal circuit board inspection device of the present invention configured as described above, each differential side probe is attached to the second mount 6b.
By moving 15 and 15, the relative positions of the fixed side probes 10 and 10 and the differential side probes 15 and 15 can be changed.
Since it can be adjusted in the moving direction (the front and back direction in FIG. 2), the pitch P of the drawing patterns 7 and 7 of the liquid crystal circuit board 4 and the pitch p of the circuit patterns 8 and 8 are different, The liquid crystal circuit board 4 can be inspected.

That is, by intermittently moving the moving table 3 along the X-direction guide rails 2 and 2 by the pitch p of the circuit patterns 8 and 8, the fixed side probes 10 and 10 are moved to the circuit pattern 8 of the liquid crystal circuit board 4. , 8 are brought into contact with each other in order.

At the same time, the differential transfer base 13
Is moved in the same direction as the moving table 3 little by little (by P-p), and the differential side probes 15 and 15 are moved,
The liquid crystal circuit board 4 is brought into contact with the extraction patterns 7, 7.

In the illustrated embodiment, two pairs of fixed-side probes 10 and 10 and differential-side probes 15 and 15 are provided. Therefore, the circuit patterns 8 and 8 provided in the center of the liquid crystal circuit board 4 and both sides thereof are provided. The continuity inspection with the provided extraction patterns 7 and 7 can be performed all at once.

(Effects of the Invention) Since the liquid crystal circuit board inspection apparatus of the present invention is configured and operates as described above, the liquid crystal circuit board inspection apparatus can be used in a state in which the pitch of the extraction pattern and the pitch of the circuit pattern remain different. Since the inspection can be performed efficiently, the cost of the liquid crystal circuit board can be reduced.

[Brief description of drawings]

1 and 2 show an embodiment of the liquid crystal circuit board inspecting device of the present invention. FIG. 1 is a partially cutaway perspective view, FIG. 2 is a front view showing the whole structure, and FIG. 3 is a liquid crystal circuit board. 3 is an enlarged plan view showing an example of FIG. 1: base, 2: X direction guide rail, 3: moving table, 4: liquid crystal circuit board, 5: Y direction guide rail, 6a: first mounting base, 6b:
2nd mount, 7: drawing pattern, 8: circuit pattern,
9: Notch, 10: Fixed side probe, 11: Support plate, 12: Differential guide rail, 13: Differential moving base, 14: Probe holder, 15: Differential side probe.

Claims (3)

[Scope of utility model registration request] 1. A moving table on which a liquid crystal circuit board, which is an object to be inspected, is placed and which moves in a horizontal direction, and a movable table which is provided above the moving table and movable in a direction perpendicular to the moving direction of the moving table. A first mounting base, a fixed-side probe supported by the first mounting base and capable of abutting contact with the upper surface of the liquid crystal circuit board, and the same as the first mounting base above the moving table. Differential side movably supported in the same direction as the moving direction of the moving table on the upper surface of the second mounting base movably provided in the direction, and abuttable on the upper surface of the liquid crystal circuit board. Inspection device for liquid crystal circuit board consisting of probe. 2. The liquid crystal circuit board inspection device according to claim 1, wherein the first mounting base and the second mounting base are integrated. 3. The liquid crystal circuit board inspection device according to claim 2, wherein the integrated first and second mounts are fixed above the moving table.