JPH0755506Y2 - Substrate circuit inspection device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a circuit board inspection device used for inspection / adjustment of a printed wiring board itself or a printed wiring board on which electronic components are mounted.

BACKGROUND ART A board circuit inspection device used for inspection / adjustment of an electric circuit formed of a conductive pattern formed on a printed wiring board or an electronic component mounted on the printed wiring board is conventionally used for a board to be inspected. The operations of positioning, fixing, abutting the inspection stylus on the conductive portion on the substrate, and energizing the stylus with an inspection current have to be performed separately and independently.

Therefore, the total number of man-hours required for each work is the man-hour required for the board circuit inspection.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a board circuit detection device capable of reducing the number of steps required for board circuit inspection.

In order to achieve the above-mentioned object, a substrate circuit board inspection apparatus according to the present invention comprises a carrying member carrying a substrate carrying a conductive circuit at its peripheral portion, and the carrying member movably provided with respect to the carrying member. A stylus plate in which a stylus that abuts on a conductive portion on a substrate carried by a member is affixed, and a stylus plate sandwiched between the carrying member and movable on the opposite side of the stylus plate to the carrying member And a pressing member that is driven in the vicinity of the carrying member to press the substrate while correcting the deformation of the substrate carried by the carrying member, and the stylus plate to drive the stylus on the substrate. A single driving means for bringing the pressing member into contact with the conductive part and driving the pressing member to the vicinity of the carrying member to press the substrate, and holding the pressing member driven near the carrying member at that position. The locking member to be locked and the front A switch for supplying an inspection current to a stylus, comprising: a substrate circuit inspecting device, wherein the driving means places the pressing member in the vicinity of the carrying member before the stylus contacts a conductive portion on the substrate. Driving, and closing the switch after the stylus comes into contact with the conductive part on the substrate, the lock member is configured such that the stylus causes the conductive part on the substrate to move in accordance with the movement of the stylus plate. The pressing member is held and locked before coming into contact with.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in the figure, in the circuit board inspection apparatus according to the present invention, a pair of carrying members 1 for carrying a printed wiring board (not shown) at the peripheral portions of the box-shaped housing 2 are provided at the peripheral portion of the upper opening 2a. Are fixed parallel to each other by fixing means such as screws 3. The pair of carrier members 1 are fixed so as to carry two opposite sides of the substrate, and the carrier members 1 can be adjusted according to the size of the substrate. That is, the adjustment can be performed by loosening at least one of the carrying members 1 by loosening the screw 3 and moving the carrying member 1 in parallel along the groove 2b extending at right angles to the carrying member 1. The carrying member 1 has an L-shaped cross section, and carries a substrate in its recess. As is clear from FIG. 2, the recess is widened at one end. This is because when the substrate is placed on the carrier member 1, the tip of the substrate is set to the expanded portion of the recess 5.
This is to facilitate the work when the substrate is placed on 5a and slid inward along the recess 5.

In the housing 2, a stylus plate 8 in which a plurality of stylus 7 that abuts on the conductive portion on the substrate carried by the carrying member 1 at its tip is planted is provided movably with respect to the carrying member 1. ing. In addition to the stylus 7, a positioning pin 9 that engages with a positioning hole formed in the substrate to accurately position the substrate with respect to the stylus plate 8 is provided upright on the stylus plate 8 higher than the stylus 7. There is.
The stylus plate 8 is carried by a movable frame 10 which carries the peripheral portion thereof, and the movable frame 10 has a pair of cross links 12 of a pair of fixed frames 11 fixed to the lower peripheral portion of the upper opening 2a of the housing 2. Suspended through. It is composed of two longitudinal links 13 pivotally attached to each other at the center of the cross link 12. In this way, by suspending the movable frame 10 on the fixed frame 11 via the cross link 12, the stylus plate 8 is held by the carrying member 11.
It is freely movable in parallel to the substrate carried on the substrate. The movable frame 10 is a return spring.
It is biased downwards by 15.

On the other hand, above the upper surface opening 2a of the housing 2, that is, above the carrying member 1, a pressing member 16 is provided so as to be movable with respect to the carrying member 1. The pressing member 16 is composed of a pressing plate 17 and a pressing rod 18 provided upright on the pressing plate 17, and the pressing rod 18 is fixed on the pressing plate 17 by a fixing means such as a screw, and is a substrate carried by the carrying member 1. The detaching and mounting positions can be changed according to the size of the component and the position of the mounted component. For convenience of changing the mounting position of the pressing rod 18, the pressing plate 17 is provided with a groove or an elongated hole to which the pressing rod 18 is fixed.
The mounting position of 18 can be changed along the groove or slot by loosening the fixing means. The pressing member 16 constructed in this manner is fixed to the swing member 21 that is swingably pivoted by the hinge 20 with respect to the housing 2, and is movable from the vicinity of the carrying member 1 to above it. .

The pressing member 16 is driven in the vicinity of the carrying member 1 by a driving means described later, and is brought into contact with the substrate carried by the carrying member 1 positioned there by the tip of the pressing rod 18 to press the substrate downward at the same time. The warp of the substrate that occurs when the stylus 7 contacts the conductive portion of the substrate is corrected.

In addition to driving the pressing member 16, the above-mentioned driving means also functions to drive the stylus plate 8 in the vertical direction to bring the stylus 7 into contact with the conductive portion on the substrate. This drive means is a single drive shaft 23 rotatably supported on the lower part of the housing 2,
A roller support member 25 extending at a right angle to the roller 23 is fixed to the roller 23. A roller 26 that abuts the lower end of the movable frame 10 is rotatably supported at the tip of the roller support member 25. Therefore, when the drive shaft 23 rotates, the roller 26 rolls along the lower end of the movable frame 10 and moves up and down while moving on an arcuate orbit centered on the drive shaft 23. On the other hand, a lever 28 is fixed to the roller supporting member 25 at right angles thereto. A longitudinal link 30 is swingably supported at one end of the lever 28 at one end thereof. The other end of the longitudinal link 30 has a long hole 30a formed therein.
Engages with the protrusion 31 formed on the swing member 21. Therefore, when the drive shaft 23 rotates, the lever 28 accordingly rotates around the drive shaft 23. By this rotation, the longitudinal link 30
Is driven, the swinging member 21 is swung about the hinge 20, and the pressing member 16 is swung above the carrying member 1.

In the figure, the cross link 12, the roller support member 25,
Although one roller 26, one lever 28 and one longitudinal link 30 are shown, they are also provided in the same manner with the above-mentioned configuration on the upper body opening 2a of the housing 2 on the half body side.

In this embodiment, a handle 33 for manually rotating the drive shaft 23 is fixed to one end of the drive shaft 23.
It is also possible to use a motor or an air cylinder as a means for rotating the 23.

As described above, the pressing member 16 driven by the driving means and positioned so as to cover the upper surface opening 2a of the housing 2 in the vicinity of the carrying member 1 is held at that position by the lock member 35 arranged near the upper surface opening 2a. It has become so.
The lock member 35 projects upward from the inside of the housing 2 through a through hole 2b formed in the upper surface of the housing 2,
Moreover, it is pivotally supported on the lower part of the upper surface of the housing so as to be swingable. The lock member 35 has a bent portion 35a inside the housing 2, and the bent portion 35a is provided with a through hole 10a provided in the movable frame 10.
Has been inserted into. Therefore, when the movable frame 10 is moved upward, the lock member 35 is moved to the bent portion 35a and the movable frame 10
The rocking member 21 is rocked in cooperation with the through hole 10a formed in the upper end, and is engaged with the tip end portion of the rocking member 21 in the rectangular recess 35b formed in the upper end portion (shown in FIG. 4). Held in that position. On the contrary, when the movable frame 10 is moved downward, the engagement between the lock member 35 and the rocking member 21 is released.

A switch 37 for controlling the supply of the inspection current to the stylus 7 is arranged at the bottom of the housing 2. The switch 37 has a movable piece 38 that comes into contact with the lever 28. When the drive shaft 23 rotates, the lever 28 rotates, and the lever 28 comes into contact with the movable piece 38 and pushes it downward. Is turned on, and the inspection current is supplied to the stylus 7 from a current source (not shown).

Next, the operation of the board circuit inspection apparatus configured as described above will be described.

First, the movable member 10 carrying the stylus plate 8 and the swinging member 21 carrying the pressing member 16 are driven by rotating the drive shaft 23 to a position farthest from the carrying member 1 carrying the substrate. Then, the substrate to be inspected is placed on the carrier member 1. At this time, the operator roughly positions the substrate with respect to the stylus plate 8. Then, when the drive shaft 23 is rotated by the handle 33, the swing member 21 and the movable frame 10 are driven in a direction approaching the carrying member 1. At this time, the pressing member 16
Before the contact of the stylus 7 with the conductive part on the substrate
It is driven in the vicinity and the pressing rod 18 gently presses the substrate downward. At this position, the movement of the pressing member 16 stops, but the drive shaft 23 is further rotated to further raise the movable frame 10. In order to allow further rotation of the drive shaft 23, the longitudinal link 30 is provided with a long hole 30a that engages with the projection 31 formed on the swing member 21. When the movable frame 10 is further raised, the lock member 35 engages with the swing member 21 and holds the pressing member 16 in that position. Further, when the movable frame 10 is raised, the positioning pins 9 provided upright on the stylus plate 8 are inserted into the positioning holes formed in the substrate, and the substrate is accurately positioned with respect to the stylus plate 8. . Furthermore, the movable frame 10 moves up and the stylus 7
Contacts the conductive part on the substrate at its tip. Even after the contact, the movable frame 10 can be raised until the roller 26 reaches the uppermost position of the arcuate locus, but the stylus 7 is configured to be extendable and retractable as well known, so that the stylus 7 contracts. The movable frame 10 is allowed to rise after the contact. Laura 26
When the lever reaches the uppermost position, the lever 28 contacts the movable piece 38 of the switch 37, and when the drive shaft 23 is further rotated, the lever 28 pushes the movable piece 38 downward and the switch 37 is turned on and touches. The inspection current is supplied to the needle 7, and the circuit of the substrate can be inspected. In this case, if a through hole is provided in a corresponding portion of the pressing plate 17, a tool such as a driver is inserted through the through hole to adjust an electronic component that requires adjustment such as a semi-fixed volume mounted on the substrate. You can

After the inspection / adjustment of the board circuit, the drive shaft 23 is rotated in the reverse direction to perform the above operations in the reverse order, and the board is taken out by the operator.

In the apparatus of the above-described embodiment, the cross link 12 is used to support the stylus plate 8 in parallel movement in the direction perpendicular to the substrate. However, the parallel slider rail is used to make the movement possible. Alternatively, known mechanisms that allow translation can be substituted.

Further, when the positioning pin 9 provided upright on the stylus plate 8 is formed to have a height protruding from the stylus plate 8 at the lowermost position to the upper surface of the housing 2, when the substrate is placed on the carrying member 1. It is also possible to perform positioning based on the positioning pin 9.

Effect of the Invention As described above, in the circuit board inspection apparatus according to the present invention, the stylus plate and the pressing plate are moved so as to hold the test substrate, and the stylus is pressed before it abuts the test substrate. The plate is locked, the switch is closed after the contact, and the test current is supplied to the stylus by driving a single drive means. It is possible to continuously perform a series of operations such as positioning and fixing the board to be mounted, fixing the probe to the conductive part on the board, supplying the test current, etc. by a single operation. Can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a substrate circuit inspection apparatus according to the present invention, and FIGS. 2, 3, and 4 are a plan view, a front view and a side view, respectively, of the substrate circuit inspection apparatus according to the present invention. Explanation of symbols of main parts 1 ... Supporting member, 5 ... Recessed portion 7 ... Stylus, 8 ... Stylus plate 9 ... Positioning pin, 10 ... Movable frame 11 ... Fixed frame, 12 ... Cross link 16 …… Pressing member, 21 …… Rotating member 23 …… Drive shaft 25 …… Roller support member 26 …… Roller, 28 …… Lever 30 …… Longitudinal link, 35 …… Lock member 37 …… Switch

Claims (2)

[Scope of utility model registration request] 1. A carrying member for carrying a substrate carrying a conductive circuit at its peripheral portion, and a conductive part on the substrate carried by the carrying member and movably with respect to the carrying member at the tip. A stylus plate on which a contacting stylus is planted, and a supporting member sandwiching the supporting member, are provided movably with respect to the supporting member on a side opposite to the supporting plate, and are driven near the supporting member to support the supporting member. A pressing member for pressing the substrate while correcting the deformation of the substrate carried by the member, and driving the stylus plate to bring the stylus into contact with a conductive portion on the substrate and carry the pressing member. A single drive means for driving the substrate to press the substrate in the vicinity of the member, a lock member for holding and locking the pressing member driven in the vicinity of the carrying member in that position, and an inspection current to the stylus A switch including, and a substrate including A path inspection apparatus, wherein the driving means drives the pressing member to the vicinity of the carrying member before the stylus comes into contact with a conductive portion on the substrate, and the stylus is conductive on the substrate. The switch is closed after abutting against the contact portion, and the lock member holds and locks the pressing member before the contact needle contacts the conductive portion on the substrate according to the movement of the contact plate. A board circuit inspection device characterized by the above. 2. The board circuit inspection device according to claim 1, wherein the stylus plate is movable in a direction perpendicular to the substrate carried by the carrying member.