JPS6033585Y2 - ZIF connector - Google Patents

Description

[Detailed description of the invention] This invention effectively prevents contact failure with the printed wiring board due to dust attached to the so-called ZIF connector, especially the female connector, which can connect and disconnect printed wiring boards with an insertion/extraction knife. This relates to a ZIF connector that allows

Many printed wiring boards are used in electronic devices such as computers, but when connecting these to other circuits,
A multipole connector is used into which a printed wiring board can be inserted as a male connector.

In this case, the more the connector has multiple pins, the greater the force required to insert and remove the printed wiring board, that is, the more difficult it is to operate.

Therefore, a multi-pole connector with zero insertion/extraction tools is required.

Therefore, conventional devices have been proposed that have configurations such as the partially sectional perspective view shown in FIG. 1 and the sectional views shown in FIGS. 2a and 2b showing on/off states.

This connector is provided with an insulating elliptical cam 5 rotated by an operating body 4 having a lever 4a between female contacts 2 and 3 each having a contact curved part 2at3a and fixed oppositely in an insulating case 1. It is something.

Then, by placing the cam 5 in a horizontal position as shown in Figure 2a, with the female contacts 2 and 3 opened in the left and right direction, after inserting the printed wiring board 6, the cam 5 is moved as shown in Figure 2. By returning the female contacts 2 and 3 to their original positions, they are brought into contact with the printed wiring board 6.

In this way, there is no insertion/extraction force.

On the other hand, however, in this connector, the more the number of pins is increased, the longer the cam 5 becomes, and accordingly, the length of the operating body 4 also becomes longer.

In addition to this, since the cam is oval, the operating body 4
Also, it has no choice but to have a flat shape with a small width.

For this reason, the cam 5 becomes easily twisted when the lever 4a is rotated, and the amount of twist increases as the lever moves away from the lever 4a.As a result, the rotation angle of the cam 5 decreases as it moves away from the lever 4a.

Therefore, since the separation distance between the printed wiring board and the female contact gradually becomes smaller, it is not only difficult to reduce the insertion/extraction force of the printed wiring board 6 to zero, but also the cam 5 is likely to crack due to twisting.
There are disadvantages such as the need to carefully select materials.

Therefore, the inventor of the present invention eliminated the above-mentioned drawbacks by first making it possible to turn on and off the contact without any rotational movement, but only with horizontal and vertical movement.
We have proposed an IF' connector, that is, a ZIF connector having a configuration as shown in FIGS. 3a and 4b and 4a and 4b, which show a longitudinal cross-sectional view and a cross-sectional view taken along the line A-A' in the on/off state.

This connector includes a sliding plate 7, that is, a sliding plate 7 having an off recess 7a at the lower end, an off convex part 7c connected to this through a guiding slope 7b at the right end, and a support groove 7 provided at the upper end of the sliding plate 7.
An insulating block 1 has an on-off body 8 equipped with an on-off plate 8b movably supported on a support column 8a by d, and an insulating block 1 provided with a lifting protrusion 1a at the bottom corresponding to the off protrusion 7c. When operating a lever 9 housed in the interior and provided at one end of the sliding plate 7, the on-off body 8 is prevented from moving horizontally, and only the sliding plate 7 can move horizontally and vertically. The support bodies 7e and 7f at both ends of the plate 7 are inserted into the support holes 1b and l.
(It was constructed with the support of

Then, as shown in FIG. 3a, by positioning the ON recess 7a of the sliding plate 7 to the elevation protrusion 1a using the lever 9, the ON/OFF body 8 is lowered and the difference is made as shown in FIG. The inserted printed wiring board 6 and female contacts 2 and 3 are brought into contact.

When the lever 9 is operated to place the off convex part 7c on the elevating convex part 1a as shown in FIG. 4a, the on/off body 8 rises as shown in FIG. Contact curved portion 2a of the female contact.

The lower end of 3a is pushed up to open laterally, so that the printed wiring board 6 can be inserted or removed with zero insertion force.

In this way, the on/off operation is performed by the horizontal and vertical movement of the sliding plate 7 and the vertical movement of the on/off body 8, that is, all linear movement, so that there is no damage caused by twisting of the cam as in the conventional connector described above. will be wiped out.

However, the conventional connectors shown in Figures 1 and 2 and the
A common drawback of common connectors of this type, including the connectors shown in Figures 4 and 4, is that even though the contact between the female connector and the printed wiring board appears to be normal, there are often poor connections. There is a strong demand for improvement.

The present inventor investigated this point and found that the cause of the problem was that the contact curved portion 2a of the female contact entered through the insertion hole 1d of the printed wiring board 6.

It was revealed that this was due to the dust that had adhered to 3a.

This invention eliminates the contact failure caused by dust as described above.
The purpose is to provide an IF connector, and the details thereof will be explained next using the drawings.

Figures 5a and 5b are longitudinal cross-sectional views in the on and off states showing one embodiment of the present invention, and Figure 6 is a cross-sectional side view in the off state (same symbols as in Figures 3 and 4 indicate equivalent parts). .

), and its characteristics are as follows.

The first is, as shown in FIG. 5, a position where when the off convex part 7c is placed on the elevating convex part 1a, the tip of the on/off plate 8b presses the lower end of the contact curved part 2av3a, as in the conventional connector. At the same time, the height of the on-off plate is selected so that it is located above the curved part completely as shown in FIG. It is characterized in that a convex portion 8c is provided, and a relief surface 8d between the contact curved portions 2a and 3a is provided on the lower surface thereof.

The raised rubbing convex portion 8c of the on-off body 8 scrapes the surface of the contact curved portions 2a, 3a including the contact point A with the printed wiring board 6 to remove adhering dust.

In addition, in the off state, as shown in FIG.
is pushed and held by the contact pressure based on the contact curved portions 2a and 3a.

Therefore, in the case where the support holes 1c and ld are provided in the vertical direction and the sliding plate 7 is supported vertically as shown in FIG. Even if the sliding plate 7 is moved, the sliding plate 7 only moves to the left while maintaining the raised position.

Therefore, the on-off board 8b is pressed by the contact curved portion 2at3a and remains positioned between the printed wiring boards 6), and the contact curved portion 2a is placed between the printed wiring boards 6 inserted as shown in FIG.
, 3a cannot be brought into contact.

Therefore, in the present invention, as a second characteristic configuration, the sliding plate 7
Supports 7e provided at both ends of ? On the upper surface of ?f, inclined portions 7e', ? A support hole 1c of an insulating block 1 is provided with an inclined part 1c and ld' having the same inclination on the upper end surface.
, ld.

When the sliding plate 7 is moved to the left by the ON operation, the upper ends 7 of the supports 7e and 7f are
e9, 7 f% is the slope portion 1c' of the support hole 1c, ld.
, ld', and descends as shown by the dotted line in the figure, so that the on-off plate 8b is forcibly pushed down despite the pressure from the contact curved portions 2a and 3a. This is what I did.

In this way, the tip abrasion protrusion 8c of the on-off board 8b can be easily applied to the lever 9 which is done before inserting the printed wiring board 6.
Due to the rise of the contact curved portion 2a.

The contact surface of 3a is always rubbed to remove adhering dust, so there is no possibility of dust being trapped.

Therefore, the contact curved portions 2a, 3a of the contacts 2, 3 are in good contact with the printed wiring board 6, and a reliable contact operation is performed.

Although one embodiment of the present invention has been described above, it is possible to remove adhering dust to a practically sufficient extent even without providing the abrasion convex portion 8c and the relief surface 8d on the on-off plate 8b as described above.

Further, in the above embodiment, an inclined portion is provided at the upper end of the support 7f of the sliding plate 7 and at the upper end surface of the support hole 1c of the insulating block 1, so that the sliding plate 7 and therefore the on/off body 8 are lowered.

However, for example, as shown in the enlarged view of the main part shown in FIG.
0' may be provided, or the support column itself may be inclined as shown in FIG.

As is clear from the above description, according to the present invention, not only does it not cause malfunctions due to twisting of the cam plate, unlike conventional ZIF connectors that use a rotating cam plate, but it also removes adhering dust and connects printed wiring. It is possible to provide a ZIF connector that can realize reliable contact with the board, and has great practical effects.

[Brief explanation of the drawing]

Figures 1, 2a and 2b are a partially sectional perspective view showing an example of a conventional connector and a sectional side view showing its on/off state, and Figures 3a and 4b and 4a and 4b are views of other conventional connectors. FIGS. 5a, b, and 6 are partial vertical sectional views in the on-off state and OFF state showing an embodiment of the present invention. Sectional side view in state, Figure 7a. b is an enlarged cross-sectional view of a main part showing a modification of the sliding plate support part. 1a... Convex part for lifting, 1b... Supporting hole, 1c... Supporting hole, 1d... Printed wiring board insertion hole, 1c, 1d゛・...Slope part, 1...
...Insulation case, 2...3...Female contact, 2a, 3a...Contact curved part, 6...
...Printed wiring board, 7...Sliding plate, 7a...
... Concave part for turning on, 7b... Inclined part for guiding,
7c...Protrusion for off, 7d...Support groove, 7e, ? f...Support, 7e',? f'...
... Slanted part, butt ... On-off body, 8a...
...Support column, 8b...On-off plate, 8c...
...Friction convex portion, 8d... Flank surface, 9...
...lever lever.

Claims (1)

[Scope of utility model registration request] The lower end is equipped with an on-off flat part and an off-off protrusion that is connected via a guiding slope provided on one side, and the upper end is equipped with a sliding plate that supports an on-off body with an on-off plate. In order to prevent movement and allow only the sliding plate to move left and right and up and down, the insulating case is provided with a support and lifting protrusions corresponding to the off protrusions of the sliding plate. By positioning the off protrusion above the elevating protrusion using a lever provided at one end of the moving plate, the tip of the on/off plate of the on/off body is positioned at the lower end of the contact curved part of the female contact, and the female contact is moved horizontally. In a ZIF connector that is opened in the OFF direction to be in the OFF state, the height of the on-off plate is selected to be such that the tip thereof passes through the curved surface of the contact curved part during the OFF operation, and the contact curved surface of the contact is rubbed during the OFF operation. At the same time, the support holes of the support holes at both ends of the sliding plate provided in the insulating case are each provided with a downwardly sloping part, so that the sliding plate is held between the contact curved parts during the off operation. A ZIF connector is characterized in that the ZIF connector is forcibly moved downward when it is turned on to release it from the pinching pressure caused by the contact curved part.