JPH03132100A - Board fixing device - Google Patents

Abstract

PURPOSE:To make it possible to fix a board swiftly with a simple mechanism by adopting a mechanism which moves a board pressing plate in parallel with a mounted circuit board and hold the board against a lift spring force. CONSTITUTION:A board holding plate 13 is opened based on a link support section 15 as the pivot. A mounted circuit board 12 is placed thereon. When a handle 131 is lowered, link plates 113a and 113b are rotated against the force of a lift spring 14 after the plate 13 comes in parallel with the board so that the plate 13 move downward, keeping parallel with the mounted board 12. As a result, a pressing member 132 presses the board 12 downward that a connector pin 123 may be brought into contact with a contact pin 231. When the upper part of a lock bar 134 passes through the lower part of a lock pin 211, the pin 211 is thrust by the force of a spring 212, thereby preventing the bar 234 from floating up and fixing the plate 13. It is, therefore, possible to fix the board readily and detect electric operation in simple mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a substrate inspection device for inspecting a substrate, and more particularly to a substrate fixing device for fixing a substrate to an inspection table.

BACKGROUND ART In an inspection apparatus for a printed wiring board (hereinafter simply referred to as a board) on which electronic components and the like are mounted, it is necessary to fix the board. Therefore, in devices in which contact pins are fixed for inspecting the board, a fixing method is adopted in which the board is pressed downward. The method is
As shown in FIGS. 5(a) and 5(b), the four parts of the board 92 are supported from below by a lower support member 91, and the mounting positions are determined by positioning bins (not shown). A fixing device is used that fixes the vicinity of the corner using a fixing claw 94 that rotates around a support shaft 93 (rotated from position 94A to position 94), or a substrate mounting device that slides in the horizontal direction is used. A fixing device was used, which consisted of a base and a holding plate that pushed the substrate placed on the base from above by sliding in the vertical direction.

In addition, inspection equipment that fixes the board by a method other than fixing the board from top to bottom has a configuration in which the contact pin for inspection is moved toward the fixed board. Ta.

In the method using the fixing claw 94 described above, it is necessary to use one hand to hold down the substrate 92 that is about to float upward, while rotating the fixing claw 94 using the other hand. In addition, since it is necessary to press the board 94 at four locations, the four fixing claws 92 must be rotated, resulting in a problem of poor workability.

Furthermore, in a fixing device consisting of a base that slides in the horizontal direction and a presser plate that slides in the vertical direction, two types of sliding mechanisms are indispensable, resulting in a problem that the device becomes large-scale.

Furthermore, when a method of moving the contact pins is used, a drive mechanism such as a solenoid is required to effect this movement, resulting in a problem that the inspection apparatus becomes larger.

The present invention was devised to solve the above-mentioned problems, and its purpose is to provide a substrate fixing device that can quickly fix a substrate with a simple mechanism.

In order to solve the above-mentioned problem, the board fixing device according to the present invention uses a printed wiring board placed on a board inspection table as a mounting board, and a pair of boards connected by parallel link plates. One of the members is the first link member and the other member is the second link member.
When the link member is a link member, a substrate pressing plate attached to the first link member and a second link member are rotatably supported around an axis parallel to the rotation axis of the link plate, and
When the substrate pressing plate approaches the mounting substrate from above by rotating the second link member, the rotation limit of the second link member is limited to an angle at which the substrate pressing plate is parallel to the mounting substrate. The structure includes a link support part and a lifting spring that lifts the substrate pressing plate upward by rotating the link plate when the substrate pressing plate is located above and parallel to the mounting substrate. adopt.

Operation (2) By rotating the second link member rotatably supported by the link support portion, the substrate pressing plate attached to the first link member is moved away from the substrate inspection table. In this state, place the board to be inspected on the board inspection table! ! place

After the substrate is placed on the substrate inspection stand, the second link member is rotated to its rotatable limit angle in a direction in which the substrate pressing plate approaches the placed substrate.

At this time, the mounting substrate and the substrate pressing plate are parallel to each other.

In this state, press the substrate pressing plate downward.

At this time, the substrate pressing plate moves downward while remaining parallel to the mounting substrate while rotating the link plate in a direction that opposes the force of the lifting spring, and presses the mounting substrate.

Figure 1 is a plan view showing one embodiment of the present invention, and Figure 2 is a partially exploded front view thereof.

In the figure, the parallel link 11 includes a pair of upper and lower link plates 113a and 113 provided correspondingly to both side surfaces.
b, and two link members 111, the first and second, connected by these link plates 113a and 113b.
．． 112, the first link member 1
One end of a substrate holding plate 13 having a rectangular observation window 133 formed in its center is fixed to the upper part of the substrate holding plate 11 .

A handle 131 made of a metal round bar shaped into a substantially U-shape is attached to the upper surface of the other end of the board pressing plate 13, and a metal handle 131 made of a metal round bar shaped into a substantially U-shape is attached to the bottom surface of the handle 131. A lock bar 134 is provided. Further, a pressing member 132 made of an insulating material and for pressing the substrate 12 is fixed to the lower surface of the substrate pressing plate 13 along the periphery of the observation window 133.

A lock pin support hole 2 formed along the lower part of the upper surface 216 of the main body side part 217 attached to the end of the base 251
A lock pin 211, which is a round metal bar with one end cut diagonally, is inserted into the lock pin 18 so as to be movable in the longitudinal direction. This lock pin 211 has an upper surface 21
A pin 213 is attached that passes through a slide groove 215 formed in 6 and projects upward.
A knob 214 for moving the lock pin 211 is screwed onto the top of the holder. Also lock bin 211
is pressed in the direction of protruding from the lock pin support hole 218 by a spring 212 provided at the innermost part of the lock pin support hole 218.

On the upper surface of the test tool support stand 253 provided approximately at the center of the base stand 251, at each of the four locations corresponding to the corners of the board 12, support tubes 223 are provided to support the test tool support stand 253 so as to be movable in the vertical direction. , a lower substrate support pin 221 is provided which is pushed upward by a spring 222. Further, a positioning pin 241 whose lower portion is fixed by a support rod 242 is provided at a position corresponding to the positioning hole (formed in two places) in the substrate 12.

A plurality of connector pins 12 protrude downward from the board 12 on the upper surface of the test tool support 253.
At a position corresponding to 3, there is a connector 232 consisting of a contact pin 123 having a receptacle formed at its tip end corresponding to each connector pin 123 and a holder thereof.
It is attached via a connector support stand 233.

Second link member 11 that is a component of parallel link 11
A link stand 252 formed at the end of the base 251 is provided below 2, and the link stand 252 and the second link member 112 are connected by a hinge, which is the link support part 15. C-bonded. Of the link plates 113a and 113b provided above and below on each side, the lower link plate 113b has a long end on the second link member 112 side, and is attached near its tip. spring retaining bolt 141 and second link member 112
Spring retaining bolt 1 attached to the bottom of the middle shaft
42, these spring stoppers l-141
, 142 is attached.

Regarding the operation of one embodiment of the present invention having the above configuration,
This will be explained below with reference to FIGS. 3 and 4.

When replacing the board 12, by rotating the second link member 112 in the direction of arrow B using the hinge that is the link support part 15 as a support part, the board holding plate 13 can be attached from position 31. keep away. In this state,
By inserting the positioning pin 241 (not shown in FIG. 3) into the positioning hole of the board 12,
The substrate 12 is attached to a predetermined position on the substrate inspection table (hereinafter, the attached substrate 12 will be referred to as a mounting substrate). At this time, since the lower board support bin 221 of the mounting board I2 is lifted upward by the spring 222, the connector pins 123 protruding downward from the mounting board 12 are connected to the signal for inspection. It is located away from the contact bin 123 that performs input and output.

When the attachment of the board 12 to the predetermined position is completed, the second link member 112 is rotated in the direction of the arrow. This rotation of the second link member 112 in the direction of arrow A is such that the lower surface of the second link member 112 is connected to the link stand 25.
It stops at the angle where it touches 2.

At this time, the substrate pressing plate 13 is in a parallel positional relationship with the mounting substrate 12 (see FIG. 4). Further, since the link plate 113b is pulled to rotate in the direction of arrow C by the action of the lifting spring 14, the first link member 111 is in a lifted state. Therefore, the pressing member 132 does not touch the mounting substrate 12 and presses the mounting base t.
tIi, 12 is in a state where it is lifted by the lower board support bin 221, and the connector pin 123 and the contact bin 123 are in a state where they are separated.

In this state, when the handle 131 is pushed down, the link plates 113a and 113b move against the force of the lifting spring 14.
will rotate, and the substrate pressing plate 13 will be able to move the mounting substrate 12
Move downward while remaining parallel to the Further, the lock par 134 moves downward while pushing the lock bin 211 in the direction of arrow E.

Therefore, the pressing member 132 presses the mounting board I2 downward, and the connector pin 123 and the contact pin 123 come into contact with each other. Moreover, when the upper part of the lock par 134 passes the lower part of the lock bin 211, the lock bin 211
is pushed out by the force of the spring 212, and in order to prevent the locking member 134 from lifting up, the board pressing plate 13 is fixed at the position shown in FIG.

In other words, the mounting board 12 is pressed downward while keeping it horizontal, and the connector pins 123 are pushed downwards to the contact pins 1.
It is fixed at a position where it contacts 23.

Then, through the contact pins 123, signals necessary for the test are transferred between the device that tests the electrical operation and the mounting board 12. Furthermore, since the operation inspection of the mounting substrate 12 includes the operation of the liquid crystal display device 121 mounted on the mounting substrate 12, the characters displayed on the liquid crystal display device 121 are displayed on the observation window 1.
The reading is performed by using an imaging device provided on the top of 33.

When the inspection is completed, the lock pin 211 is unlocked by the lock pin 211 by moving the knob 214 in the direction of the arrow E, and the lifting spring 1 is released.
Since the link plates 113a and 113b are rotated by the force of 4, the substrate pressing plate 13 is lifted upward while remaining parallel to the mounting substrate 12, resulting in the state shown in FIG. Then, using the handle 131, press the board pressing plate 13.
Lift up and move to the state shown in Figure 3. Then, the mounting substrate 12 that has been inspected is removed, and the substrate to be inspected is attached.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the case where the electrical connection between the device for inspecting electrical operation and the mounting board 12 is made via the connector pin 123 has been described, but other examples are possible. As a method of electrical connection, a probe needle attached to the test device support stand 253 is used.
The present invention can be similarly applied to a method of directly connecting to a printed pattern on the mounting board 12.

In the substrate fixing device according to the present invention, a substrate pressing plate for holding the substrate is attached to a first link member, which is one member connected by link plates of parallel links, and the other member A certain second link member is rotatably supported by using a link support part, and when the second link member is rotated in a direction in which the substrate pressing plate approaches the substrate, the rotation range of the second link member is changed so that the substrate pressing plate Since the limit is the angle at which the plate is parallel to the substrate, when the substrate holding plate presses the substrate, the parallel links move to maintain parallel to the mounted substrate. ,−
Since the mounting substrate is fixed by the subsequent operation, it is possible to quickly fix the mounting substrate without complicating the mechanism.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a plan view showing an embodiment of the present invention.
A partially fragmented front view showing one embodiment of the present invention; FIG. 3 is an explanatory diagram showing the state of the board push plate when it is placed farthest from the mounting position of the board; FIG. 4 is a board push plate Fig. 5(a) and Fig. 5(b) are explanatory drawings showing the prior art. . 11... Parallel link 111... First link member 112... Second link member 113a... Link board 113b... Link board 12... Mounting board l3... Board pressing plate 14... Lifting spring 15... Link support portion.

Claims (1)

[Claims] (1) A printed wiring board placed on a board inspection table is used as a mounting board, one member of a pair of members connected by a parallel link plate is used as a first link member, and the other member is used as a second link member. When used as a link member, a substrate pressing plate attached to the first link member and a second link member are rotatably supported around an axis parallel to the rotation axis of the link plate, and the second link member is rotatably supported. When the substrate pressing plate approaches the mounting substrate from above by rotating the member, the rotation limit of the second link member is limited to an angle at which the substrate pressing plate becomes parallel to the mounting substrate. a link supporter; and a lifting spring that lifts the substrate pressing plate upward by rotating the link plate when the substrate pressing plate is positioned above and parallel to the mounting substrate. A board fixing device characterized by comprising: