JPH05172899A - Determination of upper position of circuit board inspecting device - Google Patents

Abstract

PURPOSE:To improve the positioning precision in the electric contact between the connector of an inspected circuit board set on a substrate and a probe installed on a press board, in a circuit board inspecting device. CONSTITUTION:A movable guide unit 2 is installed so as to be movable for a press board, and a movable guide 4 which is applied with an urging force by a spring 3 in the downward direction and has a tapered shaped top edge is installed on the movable guide unit 2. while, a guide board 6 having a tapered hole 5 is installed on a glass epoxy plate 8 as base board. The position adjustment in the electric contact between the connector 9 circuit board 7 and a probe pin 10 is carried out by fitting the movable guide 4 into the tapered hole 5 by lowering the press board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of locating an upper portion of a circuit board inspection device, and more specifically, in a function inspection of a double-sided mounting circuit board, a connector on the double-sided mounting circuit board set at a base and a probe pin for the inspection. To position them to make electrical contact.

[0002]

2. Description of the Related Art FIG. 3 is an enlarged side view of an upper positioning portion of a conventional circuit board inspection apparatus. A circuit board 17 to be inspected is set on a glass epoxy plate 16 serving as a base. The probe pin 19 is fixed to the end of the fixing unit 15 attached to the press board 15, and the connector 18 on the circuit board 17 and the probe pin 19 are electrically coupled by lowering the press board 15. A memory card, for example, is connected to the probe pin 19, and the circuit board 17 can be inspected by connecting the connector 18 and the probe pin 19.

A guide rod 12 is provided on the fixed unit 15 for aligning and fitting the connector 18 and the probe pin 19 when the probe pin 19 is coupled, while a guide receiver having a cylindrical hole 14a in which a bearing 13 is mounted is provided. 14 is provided on the glass epoxy plate 16. Press board 15
The guide pin 12 and the connector 18 are aligned by fitting the guide rod 12 into the cylindrical hole 14a of the guide receiver 14 by descending.

[0004]

In the conventional method of positioning the upper part of the circuit board inspecting apparatus, since the guide rod 12 is fixed as is apparent from the above description, accurate alignment with the lower guide receiver 14 is performed. Was difficult. Also,
If the parallelism between the press board and the glass epoxy plate is not maintained, there is a problem that the guide bar may be caught in the cylindrical hole of the guide receiver. An object of the present invention is to solve the above problems, and to accurately position the electrical contact between a probe pin attached to a press board and a connector on a circuit board so that a guide for alignment can be caught in a guide receiver. It is an object of the present invention to provide a method of locating an upper portion of a circuit board inspection device without causing a serious accident.

[0005]

In order to achieve the above object, the method for positioning the upper part of the circuit board inspecting apparatus according to the present invention is such that a movable guide unit is attached to the press board so that it can be slightly displaced horizontally. The movable guide unit is provided with a movable guide having a tapered tip end to which a biasing force is applied downward, and a base is provided with a guide base having a recessed shape complementary to the distal end shape of the movable guide. By lowering the board and fitting the movable guide into the recess, the probe pin fixed to the movable guide unit in a fixed positional relationship with the movable guide and the connector of the circuit board to be inspected set on the base. The electrical contacts are positioned. Also, a memory card can be connected to the probe pins of the circuit board inspection device for inspection.

[0006]

According to the above method, even if the movable guide is slightly deviated from the tapered hole of the guide base, the movable guide unit moves in parallel by the above-mentioned amount of deviation when the movable guide and the tapered hole are fitted together. Can be positioned easily. Also, the guide is not caught.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of a circuit board inspection apparatus (hereinafter referred to as “card tester”) adopting the method according to the present invention. By pressing down the press board 1 which moves up and down and pressing down the circuit board 7 for inspection set on the glass epoxy plate 8 containing the probe pin and the additional circuit, the additional circuit and the circuit board 7 in the glass epoxy plate 8 are pressed. Are electrically connected via probe pins. As a result, it operates as a device.

FIG. 2 is an enlarged side view of the upper positioning portion of FIG. When the press board 1 descends, the tapered tips of the two movable guides 4 and the tapered holes 5 provided in the guide base 6 are fitted to each other before the probe pins 10 come into contact with the connectors 9 on the circuit board 7. Spring 3 provided around movable guide 4 as press board 1 descends.
Is compressed, and the movable guide 4 is pushed upward. Since the movable guide 4 is pressed by the compression of the spring 3 and the movable guide unit 2 is attached to the press board 1 with a slight clearance, the movable guide unit 2 can move in the horizontal direction by the repulsive force of the spring 3.
Since the position of the guide base 6 is determined so that the probe pin 10 and the lead of the connector 9 are accurately contacted with each other, even if the position of the movable guide 4 is slightly displaced when repeatedly inspecting the circuit board 7, the probe pin 10 Can be accurately and stably contacted with the lead of the connector 9 on the circuit board 7, and the memory card 11 and the circuit board 7 are electrically connected.

Since the circuit board 7 and the memory card 11 are electrically connected in this manner, it is not necessary to attach or detach the memory card 11 to or from the circuit board 7 every time the circuit board 7 is inspected by the card tester. . Therefore, the wear of the connector of the memory card itself can be avoided, it is not necessary to replace the memory card periodically, and the maintenance becomes free. Further, since the positioning is determined by the movable guide 4 and the tapered hole 5, the movable guide 4 will not be caught on the guide base 6 even if the parallelism between the press board 1 and the glass epoxy plate 8 is not maintained to some extent. Positioning of the board 1 can also be performed relatively easily.
In the present embodiment, the example of the memory card is shown as an object to be connected to the connector on the circuit board by the probe pin. However, in the case of measuring signals such as various frequencies and voltages of the surface mounting board, and connecting other accessory circuits and the like. It can also be applied when

[0010]

As described above, according to the method of the present invention, the movable guide unit is attached to the press board so that the movable guide unit can be slightly displaced in the horizontal direction, and the downward biasing force is applied to the movable guide unit. The movable guide having a tapered tip is provided, and the base is provided with a guide base having a recess having a shape complementary to the front end of the movable guide, and the press board is lowered to fit the movable guide into the recess. The electrical contact between the connector on the circuit board and the probe pin is determined by the matching. Therefore, even if the parallelism between the press board and the glass epoxy plate is not maintained to some extent, the problem that the guide is caught does not occur. Further, since positioning of the press guard becomes easy, there is an effect that setup change time such as jig change can be reduced. When the method of the present invention is used to position the electrical contact between the circuit board and the memory card as described in the embodiment, the time for inserting and removing the memory card when inspecting the board is unnecessary, and the connector wear of the memory card itself does not occur. The effect is that it can be avoided and there is no need to regularly replace the memory card.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a circuit board inspection device configured by an upper positioning method according to the present invention.

FIG. 2 is a partially enlarged view of a positioning unit in FIG.

FIG. 3 is a partially enlarged view showing an example of a conventional circuit board inspection device. 1 ... Press board 2 ... movable guide unit 3 ... spring 4 ... movable guide 5 ... taper hole 6 ... guide stand 7 ... circuit board 8 ... glass epoxy plate 9 ... connector 9a ... lead 10 ... probe pin 11 ... memory card 12 ... guide Rod 13 ... Bearing 14 ... Guide receiver 14a ... Cylindrical hole 15 ... Fixed unit

Claims (2)

[Claims] 1. A movable guide unit is attached so as to be able to be slightly displaced in the horizontal direction with respect to a press board, and the movable guide unit is provided with a movable guide having a tapered tip end which is biased downward. By providing a guide stand having a recessed portion having a shape complementary to the tip shape of the movable guide on the base and lowering the press board and fitting the movable guide into the recessed portion, the movable guide unit is provided. An upper positioning method for a circuit board inspecting apparatus, comprising: positioning electrical contact between a probe pin fixed in a fixed positional relationship with the movable guide and a connector of a circuit board to be inspected set on the base. 2. The upper positioning method for a circuit board inspection device according to claim 1, wherein the circuit connected to the probe pin of the circuit board inspection device is a memory card.