JPH03133074A - Multiple contact type connector - Google Patents

Abstract

PURPOSE:To facilitate high-frequent pulling of a device of big size having a very large number of contacts by providing a plurality of movement control levers for independently moving contact moving means which are divided into two in roughly symmetry with respect to a housing. CONSTITUTION:The contact driving sliding plate 18 of a rectangular housing 14 is divided into two or more in roughly symmetry to each other and the divided sliding plates 18 are driven by respective independent control levers 16a, 16b. The control lever 16a has control portions at the right side front and rear ends thereof and is rotated clockwise so that a group of contacts provided on the right side of a device 10 are driven. The control lever 16b has control portions at the left side front and rear ends thereof and is rotated counterclockwise so that a group of contacts provided on the left side of the device 10 are driven. The sliding plate 18 is biased i.e. moved to the left side in relation to a base housing 14a and a cover housing 14b by rotation of the control lever 16a. Thus a contact in any position can surely be actuated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to multi-contact type connectors, particularly low insertion force (LIF) connectors or Regarding sockets.

[Prior art and its problems]

As the degree of integration and functionality of ICs (integrated circuits) increases,
The trend is for an ever-increasing number of terminal pins to be extracted from such ICs and interconnected to, for example, circuit boards;
There are many ICs that have multiple terminal pins.

FIG. 5 shows an example of a device with an increased number of terminal pins and an IC socket to which the device is connected. LSI in the diagram
The package 1a is generally an IC chip molded with epoxy or ceramic material, and a plurality of rows of terminal pins 3a are formed on the outer periphery of the package 1a. For convenience, this example shows a case where two rows of terminal pins are formed along two sides of a rectangular main body, but recent high-density devices including microprocessors have a rectangular shape with one side of about 10 cm. Many packages have three or more rows of terminal pins on all four sides of the package.

On the other hand, the connector 2a connected to the terminal pins 3a of the device 1a has an opening in a plastic molded bouncing, in which a number of female connectors (or receptacles) corresponding to the terminal pins 3a of the device 1a are held. . The terminal pin 3a is inserted into the female connector in this opening, and a recessed portion for receiving the device body is provided at the center.

As the number of terminal pins increases, greater force is required for insertion and removal, so generally the contact piece of the female connector is biased using a moving means during insertion and removal to reduce the insertion and removal force during insertion and removal. After inserting the device, the eccentricity is restored and sufficient contact pressure is applied to the terminal pins to ensure reliable electrical contact.

Such conventional female connectors and moving or eccentric means will be briefly described below. An example of a female connector, as shown in FIG. 6, includes contact springs 71a and 71b fixed within a plurality of contact housing chambers 61 of a fixed housing 6, and a connecting portion 73 protruding from the bottom wall of the housing. Further, the free end 72 of the contact spring 71a engages with the engagement hole 51 of the sliding plate 5 having an opening, and lowers the terminal pin 3a of the device described above in response to the sliding movement of the sliding plate 5. Contact spring to enable insertion/extraction with insertion/extraction force? The gap between 1a and 71b is opened and closed.

When an operating lever (not shown) is operated, the cam lever 8 connected to the operating lever and the contact springs 71a, 71
The opening/closing operation of b will be explained with reference to FIGS. 7(A) and (B). FIG. 7(A) shows the contact spring 71 by the cam lever 8.
a and 71b are shown in the closed or normal position, and FIG. 7B shows the state in which the sliding plate 5 is slid to the left to be in the open position. As is clear from the figure, in the open position, the terminal pin openings 52 of the sliding plate 5 align with the open contact springs 71a, 71b, and the terminal pins 3 of the device 1 can be easily inserted with low insertion force. However, when it is in the closed position, the contact spring 71a,
71b are in close contact with each other, and the terminal pin 3 is held between them with sufficient contact pressure.

The multi-contact type connector or socket 2 as described above may not cause any problems if the device 1a is small and has terminal pins and the length of one side is several c1)1. However, in the case of a large device with a size of about 10 am and more than 100 terminal pins, the following problem occurs. That is, the sliding plate 5
Due to the heat or physical deformation or strain of the terminal pins, it is difficult to operate all the terminal pins in the same way (deviation), and the driving force required to move the sliding plate 5 becomes large, making manual operation difficult. A large sliding operation lever mechanism with high strength is required. As the sliding force increases, the deformation of the sliding plate increases, which has the disadvantage that it cannot withstand frequent insertion and removal of devices.

Therefore, it is an object of the present invention to eliminate the drawbacks of the conventional multi-contact type connectors described above and to provide a connector or socket suitable for large-sized devices with an extremely large number of contacts.

[Means to solve problems]

In order to solve the above-mentioned technical problem, in the multi-contact type connector of the present invention, the contact driving sliding plate of the rectangular housing is divided into two or more parts approximately symmetrically, and each divided sliding plate is divided into separate parts. Driven by a control lever.

〔Example〕

Preferred embodiments of the multi-contact type connector according to the present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1A and 1B are a plan view and a front view, respectively, of a preferred embodiment of the multi-contact type connector of the present invention. The substantially rectangular device IO has a plurality of rows of terminal pins (indicated by small circles in the figure) arranged in a predetermined shape on a rectangular frame-shaped portion on the lower surface of the outer peripheral portion 12 thereof. The device 10 is placed in a slightly larger insulating housing 14.

In this embodiment, a large number of contacts (or receptacle-type contacts) are divided into two groups, left and right, and two sliding plates in the nozzle 14 are connected to two independent operation levers 16a,
16b. That is, the operating lever 16
a has an operating section at the front and rear ends of the right side, and rotates clockwise (rightward) to drive the contact group on the right half of the device 10. On the other hand, the operating lever 16b has an operating section at the left front and rear ends, and rotates counterclockwise (left) to drive the contact group on the left half of the device 10.

FIG. 2 shows a partially enlarged cross-sectional view of the right center portion of the connector shown in FIG. 1. As shown in the figure, the insulating housing 14 is composed of a lower base housing 14a and a cover housing 14b disposed above the base housing 14a. A sliding plate 18 constituting a contact moving means is formed in a substantially U-shape along the terminal pin portion 12 mentioned above between the base housing 14a and the cover housing 14b. In addition, the base housing 14a1
Cavity 20 between cover housing 14b and sliding plate 18
A substantially elliptical cam lever 16a' connected to the operating lever 16a is inserted in the cam lever 16a, and rotation of the operating lever 16a biases the sliding plate 18 to the left with respect to the base housing 14a and the cover housing 14b. Moving.

The base (lower) housing 14a, slide plate 18, and cover (upper) housing 14a have vertically aligned openings 22a, 22b, and 22c, respectively.

Contacts 24 are inserted and held within these openings 22a to 22c. A taper is formed at the upper end of the opening 22c to facilitate insertion of the terminal pin. As is clear from FIG. 3, which is a further enlargement of a portion of FIG. 2, each contact 24 has a base of a connecting portion 24a1 that protrudes downward from the base housing 14a and is inserted and held in a through hole (not shown) of a circuit board. Under normal conditions, the arcuate curved surface portion 24b1 held in the opening 22a of the housing 14a, the pull-out stop portion 24c bent at the upper surface of the base housing 14a, and the free end from the opening 22b of the sliding plate 18 are connected to the opening 2 of the cover housing 14b.
The elastic contact spring portion 24d is located near the center of the contact spring 2c.

As can be seen from FIG. 2, the contacts 24 and the openings of the sliding plate 18 are alternately shifted and formed in a staggered or staggered manner. This makes it possible to arrange many contacts at high density in a limited space.

FIG. 4(A) shows an example of the shape of the opening 22b for driving the elastic contact spring 24d of the contact point 24 formed on the sliding plate 18.

The eccentric opening 22 of the elastic contact spring 24d of this sliding plate 18
In b, the center of one right side of the approximately rectangular opening is made to protrude into an approximately semicircle having a diameter shorter than this one side to the opposite side to the operating or sliding direction of the sliding plate 18 (to the right in the illustrated example). It is the shape. As a result, a pair of shoulders 28.2 are provided on either side of the semicircular portion 26.
8 is formed.

FIG. 4(B) is an enlarged plan view of the contact 24, and shows the sliding plate 1.
The mutual relationship with the driving opening 22b of No. 8 is illustrated. As is clear from the figure, the elastic contact spring portion 24d of the contact 24 is located in the rectangular portion of the driving opening 22b of the sliding plate 18. When the sliding plate 18 is slid biasedly by the operating lever 16, in the illustrated example to the left, the curved, substantially linear free end of the elastic contact spring portion 24d comes into contact with the shoulder 28 of the sliding plate 18. Then, as shown by the broken line in FIG. 3, the cover housing 22 is moved outside the opening 22c. When the terminal pin of the device 10 is inserted into the opening 22c in this state, the terminal pin is inserted into the circular opening 26 and reaches the arcuate portion 24b of the contact 24.

When the operating lever 16 is released in this state, the elastic contact spring 24
Due to the elasticity of d, the tip of the elastic contact spring 24d contacts the terminal pin with sufficient contact pressure. At the same time, the sliding plate 18 is moved so that the free end of the elastic contact spring 24d is connected to the shoulder 28 of the drive opening 22b.
is pressed to return the sliding plate 18 to substantially its initial position. Note that even if the sliding plate 18 does not completely return to the initial position, the terminal pins can be moved to the M port 22a by removing the device IO.
, 22b, 22c, it is pressed by the free end of the elastic contact spring 24d and returns completely, so there is no practical problem at all.

It should be noted that the present invention should not be limited to the embodiments described above, and it goes without saying that various modifications and changes can be made without departing from the spirit of the invention. For example, the contact group may be divided into four parts, top, bottom, left, and right, and the L-shaped contact group may be separately driven by four operation levers. In this case, the driving force for the sliding plate by each operating lever is reduced to about one quarter of that in the case of simultaneous operation. Since the dimensions of each sliding plate are short, reliable operation can be guaranteed with less deformation and amount.

〔Effect of the invention〕

As can be understood from the above description, according to the multi-contact type connector of the present invention, when a large number of contact groups arranged around a substantially rectangular device are slid on a sliding plate, for example, as shown in FIG.
A) When the control lever is placed at the center left end, the conventional problem that the contact point at the center right end, which is sufficiently far away from the control lever, cannot be driven sufficiently stably is completely solved. That is, since the sliding plate is divided into multiple parts and each is operated by a separate operating lever,
Contacts at any position can be operated reliably.

Further, since the force required to operate each operating lever is small, the operation can be performed using a small operating lever. Further, since the sliding plate is sandwiched between the upper and lower housings, in addition to the above-mentioned splitting operation, even an extremely thin sliding plate can be operated effectively and reliably without warping or other deformation. Therefore, the present invention is suitable for large-sized, multi-contact type connectors that have multiple contacts and are frequently inserted and removed.

[Brief explanation of the drawing]

1A and 1B are plan and side views of an embodiment of the multi-contact connector of the present invention, FIG. 2 is a partial sectional view of FIG. 1, and FIG. 3 is an enlarged portion of FIG. 2. 4(A) and 4(B) are diagrams showing the opening shape of the sliding plate 18 in FIG. 2 and the mutual relationship between the opening and the contacts, and FIGS. 5 to 7 are views of the conventional IC socket. It is an explanatory diagram. 10, Device 14, Housing 24
,,,Contacts 16a, 16b,,,Operation levers 18, 16a',,,Contact moving means\-FIG5 (MU) FIG6 (B) FIG,?

Claims (1)

[Claims] (1) A generally rectangular housing having a rectangular space in the center and holding at least one row of a large number of contacts on the outer periphery of the housing, and pins of devices such as ICs arranged in the rectangular space. In a multi-contact type connector that inserts and connects a terminal to the contact group with a low insertion force, a contact moving means for biasing the contact group and reducing the insertion/extraction force of the device is divided into at least two parts substantially symmetrically with respect to the housing. A multi-contact type connector characterized by having a plurality of moving operation levers that independently move each divided contact moving means.