JPH0350635Y2 - - 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, as shown in FIG. A pair of opposing spring pieces 2
There is one in which the terminal pin 1 is brought into contact with the socket contactor 2 with a predetermined contact pressure by inserting it between a and 2b.

In this type of connector, the terminal pin is simply inserted in the axial direction and contacts the socket contact.
After the terminal pin is inserted in the axial direction, the sliding member is slid in a direction perpendicular to the axial direction of the terminal pin by operating a lever, and the terminal pin is brought into contact with the socket contact with a predetermined contact pressure.A no-insertion/extraction force type. does not require the special drive mechanism required in other connectors.

``Problem that the invention attempts to solve'' However, in the conventional connector shown in Fig. 6, Fig. 7 shows the relationship between the insertion distance of the terminal pin 1 into the socket contact 2 and the insertion force of the terminal pin 1. like,
The terminal pin 1 is connected to the spring pieces 2a, 2 of the socket contactor 2.
Since a large insertion force is generated on the terminal pin 1 when it is inserted between the terminals b, there is a risk that the terminal pin 1 may be bent if the terminal pin 1 is thin.

Therefore, this idea reduces the insertion force of the terminal pin when inserting the terminal pin in a type of connector in which the terminal pin is inserted in the axial direction and contacts the socket contact, which prevents the terminal pin from being bent. This was done to prevent this from happening.

``Means for Solving the Problems'' The connector of this invention basically consists of a cover insulator, a preload plate, a base insulator, and a socket contact. A pin insertion hole is formed on one side of the cover insulator, and a contact chamber communicating with the pin insertion hole is formed on the opposite side, and the terminal pin is inserted into the contact chamber from the pin insertion hole. inserted into. The cover insulator is movable in the direction of insertion of the terminal pin into the contact chamber. The preload plate is fixedly provided in the contact chamber of the cover insulator, has a plate thickness equal to the diameter or thickness of the terminal pin, and has a plate surface along the insertion direction of the terminal pin into the contact chamber, and The end surface on the terminal pin insertion side is located at the position of the tip of the terminal pin when the pin is inserted into the contact chamber. The base insulator is disposed on the opposite surface of the cover insulator. The socket contact is fixed to the base insulator and has a pair of opposing spring pieces. The pair of spring pieces are inserted into the contact chamber from the opposite surface sides and clamp the bridle plate when the cover insulator is spaced apart from the base insulator at the first position. After the terminal pin is inserted into the contact chamber in this state, the cover insulator is moved together with the terminal pin to a second position relative to the base insulator, whereby the pair of spring pieces of the socket contactor are inserted into the terminal pin. to hold.

"Function" In the connector of this invention configured as described above, when the cover insulator is separated from the base insulator in the first position, the contact chamber of the cover insulator of the socket contactor is The inserted pair of opposing spring pieces are spaced apart by the preload plate, and their restoring force holds the preload plate under a predetermined pressure. In this state, when the terminal pin of the element is inserted into the contact chamber through the pin insertion hole of the cover insulator, the tip of the terminal pin abuts against the end surface of the preload plate on the terminal pin insertion side. After the terminal pin is inserted into the contact chamber in this manner, the element is pushed toward the cover insulator to bring the cover insulator together with the terminal pin close to the base insulator to the second position. At this time, the terminal pin is located on the extension of the preload plate that moves together with the cover insulator toward the base insulator, and the thickness of the preload plate is equal to the diameter or thickness of the terminal pin, so the socket contact The pair of spring pieces that were holding the preload plate are removed from the preload plate while maintaining a constant distance without any displacement in the direction perpendicular to the plate surface of the preload plate, that is, in the direction perpendicular to the axial direction of the terminal pin. While sliding in the direction of the terminal pin, the terminal pin is fitted between the pair of spring pieces. Therefore, the terminal pin can be inserted between the pair of spring pieces of the socket contact with a small force such as frictional force, and the insertion force of the terminal pin is reduced.

"Example" Figure 1 shows an example of the connector of this invention,
This is the case when configuring an IC socket.

The connector of this invention basically consists of a cover insulator 10, a preload plate 20, a base insulator 30 and a socket contact 40.

A pin insertion hole 11 is formed in the cover insulator 10 facing the upper surface 10a, and a pin insertion hole 11 is formed in the lower surface 10b.
A contact chamber 12 is formed facing the pin insertion hole 11 and communicating with the pin insertion hole 11. The contact chamber 12 is a rectangular parallelepiped groove. The pin insertion hole 11 and the contact chamber 12 are arranged in accordance with the arrangement of the terminal pins of the IC. I C
The terminal pin is inserted into the pin insertion hole 1 of the cover insulator 10.
1 into the contact chamber 12. The cover insulator 10 is made movable in the vertical direction in FIGS. 1B and 1C, which is the direction of insertion of the terminal pin into the contact chamber 12.

The preload plate 20 is made of, for example, a metal plate,
It is fixedly provided within the contact chamber 12 of the cover insulator 10. Specifically, the preload plate 20 is press-fitted into the cover insulator 10 in common for each row of contact chambers 12 arranged in the vertical direction in FIG. 1A. The thickness of the preload plate 20 is made equal to the diameter of the terminal pin of the IC, and its plate surface is aligned in the direction in which the terminal pin is inserted into the contact chamber 12. In addition, preload plate 2
Upper end surface 20a which is the end surface on the terminal pin insertion side of 0
is the position of the tip of the terminal pin when the terminal pin is inserted into the contact chamber 12. Note that the thickness of the lower end, which is the opposite end of the preload plate 20, decreases toward the tip.

The base insulator 30 is arranged on the lower surface 10b side of the cover insulator 10. The base insulator 30 has a rectangular hole 31 into which the socket contact 40 is press-fitted.
They are formed in an arrangement corresponding to the arrangement of the contact chambers 12 of the cover insulator 10.

As shown in FIG. 2, the socket contact 40 has a pair of opposing spring pieces 41 and 42. The tips of the spring pieces 41 and 42 protrude inward and are bent to form contact portions 41a and 42a. The distance d between the contact parts 41a and 42a when nothing is interposed between the contact parts 41a and 42a is
The thickness t of the preload plate 20 shown in FIG. 3A is made smaller than the diameter of the terminal pin of the IC. The contact portions 41a and 42a are slightly shifted, for example, in the direction of insertion of the terminal pin into the contact chamber 12. The bases of the spring pieces 41 and 42 are integrally connected to form a U-shaped press-fitting part 43. The socket contactor 40 has a board attachment part 44 extending from the base of one spring piece 42 to the side opposite to the contact part 42a. The board mounting portion 44 is bent into an S-shape, for example, as shown in FIG. 1B.

In the socket contact 40 having the above configuration, the press-fitting part 43 is press-fitted into the hole 31 of the base insulator 30 and fixed to the base insulator 30, and the board mounting part 4 is fixed to the base insulator 30.
4 is soldered to the printed circuit board 50, and the pair of spring pieces 41 and 42 are inserted into the contact chamber 12 from the lower surface 10b side of the cover insulator 10. Spring pieces 41 and 42 inserted into contact chamber 12
1B when the cover insulator 10 is spaced apart in the first position relative to the base insulator 30.
As shown in FIG. 3A, the contact portions 41a and 42a sandwich the preload plate 20. That is, the spring pieces 41 and 42 are connected to the preload plate 20
As a result, the distance between the contact portions 41a and 42a is made wider than the above-mentioned distance d, and the restoring force thereof holds the preload plate 20 under a predetermined pressure.

When assembling the connector, the base insulator 30 with the press-fitting portion 43 of the socket contact 40 press-fitted into the hole 31 is placed on the printed circuit board 50, and the board mounting portion 44 of the socket contact 40 is attached to the printed circuit board. 5
Base insulator 30 by soldering to 0
is supported on the printed circuit board 50, and the preload plate 2
The cover insulator 10 on which the screw 0 is fixed is brought from above to the above first position with respect to the base insulator 30, and the preload plate 20 is inserted between the spring pieces 41 and 42 of the socket contact 40. By doing so, the spring pieces 41 and 42 are introduced into the contact chamber 12.

To attach an IC to the connector configured in this way, first, as shown in Figure 3B, the IC60
The terminal pin 61 is inserted into the contact chamber 12 through the pin insertion hole 11 of the cover insulator 10. At this time, the tip of the terminal pin 61 is connected to the upper end surface 2 of the preload plate 20.
It hits 0a.

Next, the IC 60 is pushed down to a second position where the cover insulator 10 and the terminal pins 61 butt against the base insulator 30, as shown in FIG. 3C. At this time, since the terminal pin 61 is located on the extension of the preload plate 20 that is pushed down together with the cover insulator 10, and the thickness t of the preload plate 20 and the diameter of the terminal pin 61 are equal, the socket contactor 40 The spring pieces 41 and 42 that were holding the preload plate 20 are
The terminal pin 61 is removed from the preload plate 20 while maintaining the distance between the contact portions 41a and 42a constant without any displacement in the direction perpendicular to the plate surface of the terminal pin 61, that is, in the direction perpendicular to the axial direction of the terminal pin 61. During this period, the terminal pin 61 fits between the contact portions 41a and 42a of the spring pieces 41 and 42. Therefore, the terminal pin 61 is moved to the contact portions 41a, 42 of the spring pieces 41, 42 by a small force such as frictional force.
As shown in FIG. 5, which shows the relationship between the insertion distance of the terminal pin 61 from the state shown in FIG. 3B and the insertion force of the terminal pin 61, the insertion force of the terminal pin 61 is constant. , so that the terminal pin 61 does not bend.

Thus, in the contact chamber 12, the contact portions 41a and 42a of the spring pieces 41 and 42 hold the terminal pin 61 with the same pressure as when holding the preload plate 20, and the IC 60 is attached to the connector.

To remove the IC 60 from the connector, pull the cover insulator 10 upwards in the opposite direction to when attaching it, and as shown in FIG.
the terminal pin 61 into the contact chamber 1 of the cover insulator 10.
You can remove it from 2.

When the preload plate 20 is made of a metal plate, a short circuit occurs between the spring pieces 41 and 42 of the socket contactor 40 before the terminal pin 61 is inserted or after it is removed, but if this is inconvenient, the metal plate The preload plate 20 may have an insulating film formed on its surface, or the preload plate 20 itself may be an insulating plate.

Note that the contact portions 41a and 42a of the spring pieces 41 and 42 do not need to be shifted in the insertion direction of the terminal pin 61. Further, when the board mounting portion 44 of the socket contactor 40 is bent into an S shape as in the above example, there is an advantage that the connection area with the solder becomes larger, but the board mounting portion 44 is not necessarily shaped like this. It doesn't have to be a specific shape. Note that the terminal pin may be plate-shaped.

"Effects of the invention" According to this invention, when the terminal pin is inserted in the axial direction and brought into contact with the socket contact, the insertion force of the terminal pin can be reduced, and the terminal pin will not be bent. .

[Brief explanation of the drawing]

Figure 1 shows an example of the connector of this invention.
B is a plan view, B is a front view partially cut away, C is a side view partially cut away, FIG. 2 is a perspective view showing an example of a socket contact, and FIG. 3 is an example of a connector of this invention. , A is a sectional view before or after the terminal pin is inserted, B is a sectional view immediately after the terminal pin is inserted into the contact chamber or immediately removed from the contact chamber, and C is a sectional view when the terminal pin is inserted into the socket contactor. 4 is a front view similar to FIG. 1B in the same state, and FIG. 5 is a connector of this invention with the terminal pin inserted into the socket contact. Figure 6 shows the main part of an example of a conventional connector. Figure 7 shows the relationship between the insertion distance and the insertion force of the terminal pin when the terminal pin is inserted into the socket contact in the connector shown in Figure 6. It is a figure which shows the relationship between the insertion distance and the insertion force of a terminal pin at the time of insertion.

Claims (1)

[Claim for Utility Model Registration] A pin insertion hole is formed facing one side, and a contact chamber communicating with the pin insertion hole is formed facing the opposite side, and from the pin insertion hole into the contact chamber. a cover insulator that is movable in the insertion direction of the terminal pin to be inserted; and a cover insulator that is fixedly provided in the contact chamber of the cover insulator, has a plate thickness equal to the diameter or thickness of the terminal pin, and has a plate surface. a preload plate that extends along the insertion direction of the terminal pin into the contact chamber and has an end surface on the terminal pin insertion side located at the position of the tip of the terminal pin when the terminal pin is inserted into the contact chamber; a base insulator disposed on the opposite surface of the cover insulator, and fixed to the base insulator, when the cover insulator is spaced apart from the base insulator at a first position; A pair of opposing spring pieces inserted into the contact chamber from the opposite side sandwich the preload plate, and after the terminal pin is inserted into the contact chamber, the cover insulator is inserted together with the terminal pin. A connector comprising: a socket contactor that is brought close to the base insulator to a second position so that the pair of spring pieces sandwich the terminal pin.