JPH0451432Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a connector used to removably attach elements such as ICs (integrated circuits) to printed circuit boards.

``Prior art'' As a type of IC socket used to removably mount an IC on a printed circuit board, no force is applied when inserting or removing the terminal pins to prevent the terminal pins of the IC from being damaged or bent. There are some methods that do not require .

Conventionally, such a non-insertion/extraction force type connector has a pin insertion hole 1 formed on one side and a contact chamber communicating with the pin insertion hole 1 on the opposite side, as shown in FIG. 2 is formed, a base insulator 4 disposed on the side of the cover insulator 3 facing the contact chamber 2, and a base insulator 4 which is implanted in the base insulator 4 and whose one end side is inserted into the contact chamber 2. The other end of the socket contact 5 is attached to a printed circuit board, and the terminal pin 7 of the IC 6 is inserted into the pin insertion hole 1 of the cover insulator 3 as shown in FIG. By sliding the cover insulator 3 to the right in the figure, the terminal pin 7 is pressed against the socket contact 5 by the side wall of the contact chamber 2, as shown in figure B. The configuration is such that

``Problem to be solved by the invention'' However, in the conventional connector shown in FIG. LSIs that require large driving force and have a large number of pins
This is a disadvantage that cannot be compared to devices with a large number of pins, such as large-scale integrated circuits. Moreover, while the terminal pin 7 is in contact with the socket contact 5, the cover insulator 3 etc. are subjected to a large force, so the cover insulator 3 etc. made of a plastic molded product undergo deterioration over time, causing cold flow, etc. Defects may occur.

Therefore, this invention not only does not require any force to insert or remove the terminal pin, but also allows the terminal pin to contact the socket contact with a predetermined contact force using a small driving force. In addition, after one end of contact, the sliding members etc. maintain contact without receiving any force, thus preventing the sliding members etc. from deteriorating over time.

"Means for Solving the Problems" The connector of this invention includes the above-mentioned housing, a lower housing, a pin conductor, and a socket contact. The upper housing has a top plate portion formed with a pin insertion hole and a side wall for engagement. A pin mounting hole is formed in the bottom plate of the lower housing. The pin conductor is fitted into the pin mounting hole of the lower housing with one end facing the upper housing and the other end facing the opposite side. One end of the pin conductor is formed with a rod-shaped portion extending toward the top plate of the upper housing and having a thickness greater than the diameter or thickness of the terminal pin inserted into the upper housing from the pin insertion hole of the upper housing. . The socket contact is rotatably supported at one end of the pin conductor while being connected to the pin conductor, and has a pair of opposing spring pieces.
The pair of spring pieces clamps the rod-shaped portion of the pin conductor when the upper housing is in the first position relative to the lower housing. In this state, the terminal pin is inserted between the pair of spring pieces of the socket contact from the pin insertion hole of the upper housing, and then the upper housing slides with the terminal pin to the second position relative to the lower housing. This causes the socket contact to be pushed by the engaging side wall of the upper housing and pivot relative to the pin conductor.
A pair of spring pieces of the socket contactor separates from the rod-shaped portion of the pin conductor and clamps the terminal pin.

"Function" In the connector of this invention configured as described above, when the upper housing is in the first position with respect to the lower housing, the pair of opposing spring pieces of the socket contactor are moved by the rod-shaped portion of the pin conductor. Since the interval is larger than the diameter or thickness of the terminal pin, the terminal pin can be inserted from the pin insertion hole in the upper housing between the pair of spring pieces of the socket contact without requiring any force. After the terminal pin is inserted between the pair of spring pieces in this manner, when the upper housing is slid together with the terminal pin to the second position relative to the lower housing, the socket contact is inserted into the upper housing for engagement. The pair of spring pieces of the socket contact detaches from the rod-shaped part of the pin conductor by being pushed by the side wall of the socket and rotates with respect to the pin conductor, and due to the restoring force, the pair of spring pieces grips the terminal pin. , the terminal pin contacts the socket contact with a predetermined contact force and is connected to the pin conductor. Therefore, with a small driving force sufficient to rotate the socket contact with respect to the pin conductor and separate the pair of spring pieces from the rod-shaped portion of the pin conductor,
The terminal pin can be brought into contact with the socket contact with a predetermined contact force. Additionally, once the pair of spring pieces separates from the rod-shaped portion of the pin conductor and the terminal pin contacts the socket contact, the pair of spring pieces continues to hold the terminal pin to maintain contact. However, the upper housing, lower housing, etc. are not subjected to any force.

``Embodiment'' FIG. 1 shows a main part of an example of the connector of this invention, which is used to configure an IC socket.

The connector of this invention includes an upper housing 10,
It includes a lower housing 20, a pin conductor 30 and a socket contact 40.

The upper housing 10 has a top plate part 11 and side walls, partition walls, etc. perpendicular to the top plate part 11, and a pin insertion hole 12 is engaged with the top plate part 11 facing the top surface, and a pin insertion hole 12 facing the bottom surface is engaged with the top plate part 11. An engagement groove 13 communicating with the pin insertion hole 12 is formed. The pin insertion holes 12 and the grooves 13 are arranged in accordance with the arrangement of the terminal pins 60 of the IC 50.

The lower housing 20 has a bottom plate part 21 and side walls and partition walls perpendicular to the bottom plate part 21. The bottom plate part 21 has pin mounting holes 22 arranged in accordance with the arrangement of the pin insertion holes 12 in the upper housing 10. It is formed.

As shown in FIG. 2, the pin conductor 30 is formed into a plate shape, with one end 31 being wide, and a rod-shaped part 32 extending from one side of the one end 31. The thickness of the rod-shaped portion 32 is made larger than the diameter of the terminal pin 60 of the IC 50. In the illustrated example, the thickness of the entire pin conductor 30 is larger than the diameter of the terminal pin 60. Moreover, an internal hole 31a is formed in the one end portion 31. This pin conductor 30 is
The one end portion 31 and the rod-shaped portion 32 are connected to the upper housing 1
0 side, with the other end 33 facing the opposite side,
It is fitted into the pin mounting hole 22 of the lower housing 20.

As shown in FIG. 3, the socket contactor 40 has a structure in which a pair of opposing spring pieces 41 and 42 are integrally connected by a connecting portion 43 at their respective base sides. Spring pieces 41 and 42
Contact portions 41a and 42a protruding inward are shown in a.
is formed, and the connecting portion 4 of the contact portions 41a and 42
One side opposite the third side is bent outward. The distance d between the contact portions 41 a and 42 a when nothing is interposed between the contact portions 41 a and 42 a is made smaller than the diameter φ of the terminal pin 60 of the IC 50 . Spring piece 41
and 42 are formed with inwardly projecting pivots 41b and 42b. This socket contact 40 is constructed by fitting the pivots 41b and 42b of the spring pieces 41 and 42 into the hole 31a of the pin conductor 30 from both sides.
The spring pieces 41 and 42 are rotatably supported by one end 31 of the pin conductor 30 while being connected to the upper housing 10, and the tips of the spring pieces 41 and 42 are inserted into the groove 13 of the upper housing 10.

When the upper housing 10 is in the first position relative to the lower housing 20 as shown in FIG. 1A, the pair of spring pieces 41 and 42 of the socket contact 40 are parallel to the pin conductor 30, As shown in FIG.
to hold. That is, the rod-shaped portion 32 is connected to the contact portion 41.
a, 42a, contact portions 41a, 42
The interval a is wider than the above-mentioned interval d, and is larger than the diameter φ of the terminal pin 60.

The connector with the above configuration is arranged on the printed circuit board 70, the other end 33 of the pin conductor 30 is passed through the through hole 71 of the printed circuit board 70, and is soldered to the printed circuit board 70 (not shown). It is supported on the printed circuit board 70, and in this state, the terminal pin 60 of the IC 50 is attached to the upper housing 1.
Insert the socket contact 40 between the spring pieces 41 and 42 through the pin insertion hole 12 of the socket contact 40. At this time, since the distance between the contact portions 41a and 42a of the spring pieces 41 and 42 is larger than the diameter φ of the terminal pin 60, the terminal pin 60
can be inserted between the contact portions 41a and 42a without any force.

After inserting the terminal pin 60 between the spring pieces 41 and 42 in this way, the upper housing 10 is inserted into the IC50.
and slide it together with the terminal pin 60 relative to the lower housing 20 in the right direction in FIG. 1A to the second position. As a result, the spring pieces 41 and 42 are pushed by the side wall 13a of the groove 13 of the upper housing 10, which faces to the right in FIG. The spring pieces 41 and 4 rotate with respect to the pin conductor 30 using the bots 41b and 42b of 42 as fulcrums.
2 detaches from the rod-shaped part 32 of the pin conductor 30, and the contact parts 41a and 42a clamp the terminal pin 60 due to the restoring force, and the terminal pin 60 contacts the socket contact 40 with a predetermined contact force, and the pin conductor 30. In other words, IC50 is connected to printed circuit board 7.
Attached to 0.

In this case, the driving force applied to the upper housing 10 is sufficient to rotate the socket connector 40 with respect to the pin conductor 30 to separate the spring pieces 41 and 42 from the rod-shaped portion 32, and the small driving force is sufficient to rotate the socket connector 40 with respect to the pin conductor 30 and detach the spring pieces 41 and 42 from the rod-shaped portion 32. 60 can be brought into contact with the socket contact 40 with a predetermined contact force. Furthermore, once the spring pieces 41 and 42 are detached from the rod-shaped portion 32 and the terminal pin 60 comes into contact with the socket contact 40, the spring pieces 41 and 42 continue to hold the terminal pin 60. Contact is maintained and the upper housing 10, lower housing 20, etc. are not subjected to any force.

Remove the terminal pin 60 from the connector and connect the IC50
To remove the IC 50 and the terminal pin 60 from the printed circuit board 70, move the upper housing 10 along with the IC 50 and the terminal pin 60 to the lower housing 20 in the first place.
Slide it to the left in Figure c to the first position. As a result, the spring pieces 41 and 42 are attached to the side wall 13 of the groove 13 of the upper housing 10 facing leftward in FIG. 1C.
b, the socket contactor 40 rotates with respect to the pin conductor 30 in the opposite direction to the connection/attachment described above, and the rod-shaped portion 32 of the pin conductor 30 moves against the spring piece 4.
1 and 42, and the distance between the contact parts 41a and 42a is the same as that of the terminal pin 6.
0, the terminal pin 60 is released from the socket contact 40, and the terminal pin 60 can be removed through the pin insertion hole 12 of the upper housing 10 without requiring any force.

In this case, as shown in FIG.
The force with which the socket contact 40 cuts into the socket contact 40 is P, the distance from the contact point of the socket contact 40 with the side wall 13b to the center of rotation is L, and the distance from the point where the rod-shaped portion 32 of the socket contact 40 cuts in with the center of rotation. Assuming that 1 is 1, the balance of moments gives F.L=P.l, so the driving force per socket contact 40 becomes F=l/LP. Therefore, the rod-shaped portion 32 is the socket contact 4
The driving force F can be made smaller than the force P that breaks down to 0, and the terminal pin 60 can be released from the socket contact 40 with the small driving force.

FIG. 5 shows an entire example of the connector of this invention having the above-described configuration.

The side walls 14 and 15 of the upper housing 10 are fitted into the side walls 24 and 25 of the lower housing 20, so that the upper housing 10 is slidable relative to the lower housing 20 in the lateral directions of A, B and D in the figure. Ru. Of course, as described above, the pin conductor 30 is attached to the lower housing 20, and the socket contact 40 is rotatably supported on the pin conductor 30.

A slot 16 is formed at one end of the upper housing 10, facing the lower surface of the upper housing 10 and extending from one side of the upper housing 10 to the other side. A pin 83 of a cam 80 having a shape in which the cylindrical portions 82 of the cam 80 are connected by a pin 83 is inserted. The disc part 81 of the cam 80 is fitted into the side wall part 24 of the lower housing 20, the cylindrical part 82 is fitted into the side wall part 25 of the lower housing 20, and a lever 90 for rotating the cam 80 is attached to the cylindrical part 82.

As shown in A, B and C of the same figure, the lever 90
is perpendicular to the top plate 11 of the upper housing 10, the pin 83 of the cam 80 is at the top of the slot 16, and the upper housing 10, the lower housing 20, the pin conductor 30 and the socket contact 40 is in the state shown in FIG. 1A. In this state, place the connector on the printed circuit board 70, attach the pin conductor 30 to the printed circuit board 70, and connect the terminal pin 60 of the IC 50 to the socket through the pin insertion hole 12 of the upper housing 10 as described above in FIG. 1A. Insert between the spring pieces 41 and 42 of the child 40.

Next, as shown in FIG. 5D, the lever 90 is
Rotate 90 degrees to remove the top plate 11 of the upper housing 10.
parallel to. As a result, cam 8
0 pin 83 is located at the bottom of slot 16, upper housing 10, lower housing 20, pin conductor 30 and socket contact 40 are in the state shown in FIG. The IC 50 is connected to the pin conductor 30 via the socket contact 40 and mounted on the printed circuit board 70.

When the lever 90 is rotated 90 degrees in the opposite direction from this state, the pin 83 of the cam 80 returns to the upper part of the slot 16, and the upper housing 10 and the lower housing 2
0, the pin conductor 30 and socket contact 40 are in the state shown in FIG. 1A. As described above, in this state, the terminal pins 60 of the IC 50 are removed from the upper housing 10, and the IC 50 is attached to the printed circuit board 70.
Remove from.

Note that the terminal pin may be plate-shaped.

``Effect of the invention'' According to this invention, not only no force is required to insert or remove the terminal pin, but also the terminal pin can be brought into contact with the socket contact with a predetermined contact force using a small driving force, and the number of pins can be reduced. It can be adapted to a large number of elements. Moreover, once the terminal pin contacts the socket contactor, members such as the upper housing and the lower housing maintain contact without being subjected to force, and these members do not deteriorate over time.

[Brief explanation of drawings]

Figure 1 shows the main parts of an example of a connector of this invention, where A is a front sectional view with the terminal pins released, B is a side sectional view in the same state, and C is a terminal pin in contact with the socket contact. D is a cross-sectional view of A on line D-D, E is a cross-sectional view of C on line E-E, Figure 2 shows an example of a pin conductor, A is a front view, and B is a cross-sectional view of A. 3 shows an example of a socket contact, A is a top view, B is a side view, C is a front view, and FIG. 4 is a sectional view taken along the line B-B. Figure 5, which is a diagram for explaining the driving force, shows the whole of an example of the connector of this invention, where A is a top view, B is a front view with a part cut away, C is a side sectional view, and D is a view of the connector. FIG. 6 is a partially sectional front view of an IC mounted on a printed circuit board, and shows an example of a conventional connector.
A is a sectional view with the terminal pin released, and B is a sectional view with the terminal pin in contact with the socket contact.

Claims (1)

[Scope of claim for utility model registration] An upper housing in which a pin insertion hole and a side wall for engagement are formed in the top plate, a lower housing in which a pin attachment hole is formed in the bottom plate, and one end of the housing is on the side of the upper housing. The diameter of a terminal pin that is inserted into the upper housing through the pin insertion hole, which is inserted into the pin mounting hole with the other end facing toward the opposite side, and which extends toward the top plate at the one end. a pin conductor in which a rod-shaped portion having a thickness greater than or equal to the thickness of the pin conductor is rotatably supported at the one end portion in a state connected to the pin conductor, and the upper housing is connected to the first end portion with respect to the lower housing; When in position, a pair of opposing spring pieces sandwich the rod-shaped portion,
In this state, a terminal pin is inserted between the pair of spring pieces from the pin insertion hole, and then the upper housing is slid together with the terminal pin to a second position relative to the lower housing. A connector comprising: a socket contact that is pushed by the side wall and rotates relative to the pin conductor so that the pair of spring pieces separates from the rod-shaped portion and clamps the terminal pin.