JPH0423345Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a carrier suitable for holding printed circuit boards, particularly printed circuit boards on which connectors and electronic components are mounted on the periphery.

[Conventional technology]

In recent electronic devices, printed circuit boards have been unitized, and a single electronic device has come to have multiple printed circuit boards. Continuity of the unitized printed circuit board is achieved by inserting the connector mounted around the printed circuit board into the connector of the electronic device.

Furthermore, as electronic devices have become smaller in recent years, electronic components have come to be mounted on printed circuit boards at a high density, even to the periphery of the printed circuit board.

Connectors and electronic components (hereinafter referred to as
When using an automatic soldering machine to solder a printed circuit board that is equipped with a connector (also called a connector, etc.), it is difficult to hold the printed circuit board because the connector, etc. is located in the claw that holds the printed circuit board with a general printed circuit board carrier. This caused the inconvenience of not being able to maintain a strong hold.

Therefore, several carriers have been proposed in the past that take into consideration connectors mounted on the periphery of printed circuit boards (Utility Model Application No. 60-60156, No. 90871).
issue).

[Problem that the invention attempts to solve]

Utility Model No. 60-60156 uses spring pins to selectively hold down not only the printed circuit board but also the connectors mounted around the printed circuit board, so it can certainly be held firmly. , connectors that are held down by spring pins are weak against pressure from above,
Alternatively, it is not preferable for the attachment part to be deformed by pressing it down. In addition, this carrier has a holding jig with spring pins installed separately from the carrier, and when holding a printed circuit board, after placing the printed circuit board on the claws of the carrier, determine the position and then use the holding jig to hold the printed circuit board. Since the presser jig is placed on the presser, positioning the presser jig is time-consuming.

Utility Model No. 60-90871 is different from the above-mentioned Utility Model Application No. 60-90871 because the clamping piece that holds the printed circuit board can be lifted upwards only in the area where the connector etc. are located.
Unlike No. 60-60156, connectors etc. are not affected by pressure. The printed circuit board is held in the carrier by inserting the printed circuit board into a space formed by a clamping piece and a guide, and it takes time and effort to hold the printed circuit board. In addition, since the carrier has a fixed groove formed by the clamping piece and the guide, it cannot hold a printed circuit board that is thicker than the groove.On the other hand, if the printed circuit board is thinner than the groove, the printed circuit board will move within the groove and cannot be held firmly. The disadvantage is that it cannot be done.

[Means for solving problems]

This invention was devised in view of the drawbacks of the conventional carriers mentioned above.
Not only can you selectively avoid applying pressure to areas where you don't want to apply pressure, but you can also hold the printed circuit board with a single touch after placing the printed circuit board on the claws, and it also depends on the thickness of the printed circuit board. To provide a printed circuit board that can firmly hold any printed circuit board.

The features of the present invention include: a claw member with an L-shaped cross section; a base member that is slidably installed on the inner wall surface of the claw member and is biased upward by a spring; and a push-down device that lowers the base member by a certain distance. ; Multiple hold-down pins installed on the base body and biased downward by a spring; A stop that can stop the hold-down pins at a certain distance above the height of the connector or electronic component against the downward spring force; It is a carrier for a printed circuit board consisting of a device.

〔Example〕

The rectangular body 1 of the carrier has a set of sliding rods 2,
2 is bridged, and a pair of claw members 3, 3 are installed on the sliding rod so that the interval between them can be adjusted.
The claw member 3 has an L-shaped cross section, and its bottom surface forms a stepped portion 4 on which a printed circuit board can be placed.
A base body 5 is installed on the inner wall surface of the claw member so as to be movable up and down. The base body has two sliding rods 6, 6 attached to the top of the base body, which are slidably passed through holes in support pieces 7, 7 fixed to the top of the claw member 3. It is pulled upward by a compression spring 8 installed between the washer at the top of the rod and the base. Further, the claw member 3 is provided with a push-down device 9 that can lower the base body 5 by a certain distance. The push-down device is composed of a pair of L-shaped cams 10, 10 and a connecting piece 11. The L-shaped cam 10 is rotatably attached to the claw member 3 with the bent portion serving as a fulcrum.
A roller 12 installed at the bottom is located on the base body 5. The upper ends of the pair of cams 10, 10 are connected by a connecting piece 11, so that when the connecting piece is moved, the pair of cams can move in the same manner. A presser pin holder 13 is installed on the base 5, and a plurality of presser pins 14 are mounted on the holder.
...is installed so that it can slide. What is a presser pin?
A cylindrical body is installed at the upper and lower parts of a rod-shaped body, and a compression spring 15 is installed between the lower cylindrical body and the holding body, and is constantly biased downward. Also,
A stop device 16 is installed on each presser pin in the holder 13, which can stop the presser pin at a certain distance above the height of the connector or electronic component against the spring bias that presses the presser pin downward. ing. The stopping device is a ball plunger 17 in which a ball placed at the tip of a screw is pressed by a spring, as shown in FIGS. It is becoming more and more engaged.

Next, the usage conditions of the carrier of the present invention having the above structure will be explained.

First, the base body 5 is positioned upward as shown in FIG.
Place it on the stepped portion 4 of. At this time, if a connector or the like that is weak against pressing force is placed under the presser pin 14, lift the presser pin upward in advance and stop the presser pin upward using the stop device 16. Thereafter, the base body 5 is lowered by the push-down device 9. The descent of the base body 5 is
When the connecting piece 11 is rotated in the lower right direction in the drawing as indicated by the arrow in FIG. 3, the cam 10 rotates about the fulcrum, and the roller 12 moves downward, pushing the base 5 downward. . During the descent of the base 5, the presser pins 14 come into contact with the printed circuit board P, but even if the base further descends, the presser pins 14 do not advance, and the spring bias is strengthened to press the printed circuit board (fourth, (Fig. 6), the presser pin that has been lifted upward by the stop device in advance will not reach the connector, etc. mounted on the printed circuit board because the lower end of the presser pin will not reach C, even if the base body is lowered, as shown in Fig. 7. It will not cause any damage.

[Effect of idea]

When placing a printed circuit board on the carrier, the carrier of the present invention allows all the holding pins to be kept in the upper position, making it easy to place the printed circuit board, and it is strong enough to hold any thickness of the printed circuit board. It is possible to maintain Furthermore, after the printed circuit board is placed, this device can lower all the presser pins to hold the printed circuit board in place with a single touch, and can also selectively raise the presser pins in areas where the presser is not needed. Since it can be kept in place, connectors and the like are not damaged by pressure, and has excellent effects not seen in the past.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the carrier of the present invention, Fig. 2 is an enlarged perspective view of the same part, and Fig. 3 is a printed circuit board after mounting.
An explanatory diagram of the printed circuit board not yet held down by the presser pins, Figure 4 is an explanatory diagram of the printed circuit board held down by the presser pins, and Figure 5 is an enlarged view of the presser pins before the printed circuit board is held down by the presser pins. , Figure 6 is an enlarged view of the presser pin holding down the printed circuit board,
FIG. 7 is an enlarged view when the presser pin located above the connector etc. is stopped upward. 3...Claw member, 5...Base, 8...Spring, 9...
...Press down device, 14...Press pin, 15...Spring, 16...Stop device, P...Printed circuit board, C
...Connectors, etc.

Claims (1)

[Scope of utility model registration request] A claw member having an L-shaped cross section; a base body slidably installed on the inner wall surface of the claw member and biased upward by a spring; a push-down device that lowers the base body by a certain distance; A plurality of spring-biased hold-down pins; a stop device capable of stopping the hold-down pins at a certain distance above the height of the connector or electronic component against the downward spring bias;
A printed circuit board carrier characterized by comprising: