JPH0329139B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a connector with cylindrical contacts,
In particular, the present invention relates to a connector in which a lead is inserted through an upper opening of a cylindrical contact, and the lead is captured by an elastic contact piece of an inner contact installed in the cylindrical contact.

Prior Art and Its Problems Conventionally, connectors with cylindrical contacts for receiving leads have been used as IC sockets and the like. A large number of these cylindrical contacts are embedded in an insulating board, are equipped with inner contacts that elastically capture leads, and are connected to pin terminals that protrude below the insulating board at their lower ends, making it easy to mount them on wiring boards, etc. It's on.

Conventionally, the elastic contact piece of the inner contact that captures the lead is placed at the axis of the cylindrical contact, and the lead inserted into the coaxial center from the upper opening of the contact forcibly expands the elastic contact piece to create contact pressure. A configuration is adopted to obtain the following.

Problems to be Solved by the Invention Conventionally, the elastic contact piece of the inner contact has several contact pieces arranged to surround the axial center so as to capture the lead at the axial center. It is necessary to insert or remove the IC against the elasticity of the contact piece, and a large insertion/removal force is required to insert or remove the IC.
In this case, it becomes extremely difficult to insert and remove the material by hand.

The present invention solves the above-mentioned problems in connectors having cylindrical contacts, and provides a connector that can lead to contact within the contacts while enabling no-load insertion/extraction with no resistance of the inner contacts during insertion/extraction. It provides: Another object of the present invention is to provide a connector that allows the contact portion to be placed at an eccentric position while ensuring a sufficient spring length of the elastic contact piece within the limited small diameter cylinder of the cylindrical contact.

Means for Solving the Problems The present invention provides a means for solving the high-load displacement problem in the connector, in which a pair of opposing elastic contact pieces are inserted into the cylindrical contact from a ring portion that press-fits and holds the inner contact into the cylindrical contact. A contact portion is formed at the free end of the inclined elastic contact piece to press and hold the lead at a position eccentric to one end of the inner diameter line of the cylindrical contact. However, a lead insertion space is formed at a position eccentric to the other end.

Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

In the embodiment, a socket for an IC package 2 is shown as the connector 1.

The IC package 2 has a large number of round pin-shaped leads 3 protruding from its lower surface. The connector 1 consists of a connector base 4 and a movable plate 5. The moving plate 5
is stacked on the upper surface of the connector base 4, and is movable back and forth along the overlapping surface while being integrated with the base 4.
As a means for combining and moving the two 4 and 5, for example, as shown in the figure, hook-shaped engagers 6 provided on both sides of the moving plate 5 are engaged with steps 7 on both sides of the connector base 4, The portion 7 is configured to have a length sufficient for the movement stroke to allow movement while maintaining engagement.

Further, a known crank lever 8 is used as a means for applying the moving force. The crank lever 8 has a shaft portion 8a having an eccentric portion 8b inserted into an end between the movable plate 5 and the connector base 4, and holds the eccentric portion 8b on one side 4 and the other portion 5 on the other side. Shaft part 8
An operating rod 8c bent at right angles from one end of a is disposed on the side surface of the connector, and by rotating this a predetermined amount, the shaft portion 8a is rotated and the movable plate 5 is moved back and forth. There is.

The movable plate 5 has a large number of lead insertion holes 5a corresponding to the leads 3 of the IC package 2.

Similarly, the connector base 4 has a number of cylindrical contacts 9 corresponding to the leads 3 of the IC package 2 as lead connection means. The cylindrical contact 9 is implanted in the connector base 4, has an opening at its upper surface to accept a lead, and has a male terminal 9a consisting of a continuous round pin at its lower end protruding downward from the base. The lower end of the cylindrical contact 9 is
A closed end is formed by connecting the male terminals 9a. The cylindrical contacts 5 and the lead insertion holes 5a face each other vertically in a one-on-one manner when the movable plate 5 and the connector base 4 are superimposed.

Therefore, the leads 3 of the IC package 2 are inserted into the lead insertion holes 5a of the movable plate 5, and further inserted into the cylindrical contacts 9 to make contact.

The cylindrical contact 9 has an inner contact 10 held in its bore for making contact with the lead 3. The inner contact 10 has a ring portion 10a, and the ring portion 10a is press-fitted into the inner circumferential wall of the cylindrical contact 9 and held therein. A pair of elastic contact pieces 10b are extended downwardly from the ring portion 10a, and the contact portion of the elastic contact pieces 10b is arranged at an eccentric position on one end side on the inner diameter line X of the cylindrical contact 9 to make contact. position. That is, the elastic contact piece 10b is provided to extend obliquely along the longitudinal hole of the cylindrical contact 9, and the inclined elastic contact piece 1
A contact portion 10c is formed at the free end of the cylindrical contact 9 to clamp the lead 3 under pressure at an eccentric position of the cylindrical contact 9.

The elastic contact piece 10b is preferably attached to the ring 10 on the diameter line of the cylindrical contact as shown.
a, and a contact portion 10c at its free end.
, and the contact portion 10c is installed at the eccentric position.

As a means for obtaining such a configuration, for example, the elastic contact piece 10b is extended from a position 180° opposite to the ring 10a, and the contact part 10c is installed at the eccentric position by tilting it as shown in the figure from the part connected to the ring 10a. ,
In addition, they are opposed to each other across the locus of movement of the lead 3 (inner diameter line of the cylindrical contact 9), which will be described later, and the opposing interval is kept open on the same locus of movement.

By arranging the elastic contact piece 10b, a lead insertion space 11 is formed at an eccentric position on the other end side of the cylindrical contact 9 on the inner diameter line X, and the lead insertion space 11 is set as a contact standby position.

As described above, a contact standby position (lead-free insertion position) and a contact position are formed within the cylindrical contact 9. Lead 3 is moving plate 5
The pair of elastic contact pieces are inserted without load into the lead insertion space 11, which is the contact standby position, through the lead insertion hole 5a, and are moved from this position to the contact position of the elastic contact piece 10b, which is the contact position, on the inner diameter line X. 10b is intervened while being pushed apart against its elasticity, and a contact state is formed with a constant contact pressure.

In order to form a proper contact state that does not apply uneven pressure to the lead 3, the pair of elastic contact pieces 10b are opposed to each other parallel to the locus of movement of the lead 3 (inner diameter line X of the cylindrical contact 9) at least at the contact portion 10c. and place it. In order to properly intervene the lead 3, an inclined introduction surface 10d that widens laterally is formed on the lead intervention side edge of the elastic contact piece 10b.

As described above, the moving plate 5 serves as a means for appropriately moving the lead 3 from the lead insertion space 11 which is the contact standby position in the cylindrical contact 9 to the elastic contact piece arrangement position which is the contact position.
and a crank lever 8.

In order to move the lead 3 as described above, the lead insertion hole 5a of the moving plate 5 is connected to the cylindrical contact 9.
While facing the opening, the lead 3 is captured and moved from the position corresponding to the contact standby position to the position corresponding to the contact position. In order to satisfy this condition, the lead insertion hole 5a has a center that moves on the inner diameter line X of the cylindrical contact 9, and has a diameter that is approximately the same as the lead diameter in order to capture the lead 3.

In order to obtain the position corresponding to the contact standby position and the contact position of the lead insertion hole 5a and movement between the two positions, means for moving the moving plate 5, such as the crank lever 8, is provided.

In other words, move the crank lever 8 in one direction (upright direction).
By rotating the movable plate 5 to the same direction, the lead insertion hole 5a is brought to a position corresponding to the contact standby position above the opening of the cylindrical contact 9, and in the same position, the lead 3 of the IC package 2 is The lead is inserted into the lead insertion space 11 in the cylindrical contact 9 without any load through the insertion hole 5a.

In the same state, when the crank lever 8 is further rotated in the other direction (lowering direction), the moving plate 5 is moved in the same direction, and the lead insertion hole 5a is moved to a position corresponding to the contact position above the opening of the cylindrical contact 9. As a result, the lead 3 moves within the cylindrical contact 9 on its inner diameter line X, and is interposed between the contact portions 10c of the pair of elastic contact pieces 10b to form a contact pressure state. By rotating the crank lever 8 from the prone state to the upright direction and moving the movable plate 5 in the opposite direction to the above, the reed 3 is released from between the elastic contact pieces 10b and returned to the contact standby position. The screen moves to the lead insertion space 11. Therefore, the lead 3 can be removed without any load.

Effects of the Invention As explained above, the present invention extends the pair of elastic contact pieces from the ring portion of the inner contact in an inclined manner along the vertically elongated hole of the cylindrical contact, and the free end of the cover inclined elastic contact piece. Since the contact part that holds the lead is formed at a position eccentric to one end of the inner diameter of the cylindrical contact, the elastic contact piece can be moved along the vertical hole without being limited by the inner diameter of the cylindrical contact. By extending diagonally, a sufficient spring length can be ensured, and while the spring length is sufficiently long, the contact part can be placed eccentrically at one end of the inner diameter of the cylindrical contact, and the other end can be unloaded. The configuration for contact from the insertion space can be rationally configured, and this makes it possible for the first time to realize a no-load type connector that allows for no-load insertion/extraction and contact with the inner contact within the limited hole diameter of the cylindrical contact. It is something.

For example, when an elastic contact piece is extended onto the inner diameter line of a cylindrical contact to ensure the contact position and no-load insertion space, the elastic contact piece is only 1 mm to 1.5 mm long.
Considering the current situation in which cylindrical contacts with very small hole diameters on the order of millimeters are used, it is completely difficult to secure a sufficient effective length of the elastic contact piece within the same limited hole diameter, and therefore This results in a very large contact resistance during intervention, which significantly defeats the purpose of no-load insertion.

In the present invention, the eccentric position within the cylindrical contact is ensured by extending the elastic contact piece obliquely along the vertically elongated hole of the cylindrical contact and forming a contact portion located at an eccentric position at the free end of the elastic contact piece. At the same time, the effective length of the elastic contact piece can be sufficiently ensured and the contact resistance can be significantly reduced, and a no-load type connector with cylindrical contacts can be appropriately formed.

In addition, the structural feature of the cylindrical contact, whose lower end is connected and closed by the male terminal and prevents flux from rising when the male terminal is soldered, is effectively utilized, and the contact is elastic without any risk of contact with flux. It is possible to extend the contact piece.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the external appearance of a connector showing an embodiment of the present invention, Fig. 2 is a perspective view of the same connector with the movable plate opened, and Fig. 3A shows the contact standby position of the lead inside the cylindrical contact. Figure 4A is a sectional view showing the lead inserted into the cylindrical contact position (free insertion position);
A sectional view taken along line A-A in Figure A, and B- in Figure 3B.
5 is a sectional view taken from the front of the state shown in FIG. 3A, and FIG. 6 is a front view of the inner contact. 1...Connector, 2...IC package, 3...
... Lead, 4 ... Connector base, 5 ... Moving board,
9... Cylindrical contact, 10... Inner contact, 10a... Ring part, 10b... Elastic contact piece, 10c... Contact part, 10d... Inclined introduction surface,
11... Lead insertion space, X... Inner diameter line of cylindrical contact.

Claims (1)

[Claims] 1. A connector base, a cylindrical contact embedded in the connector base and having a vertically long cylindrical hole whose upper end is open on the upper surface of the connector base to receive a lead and whose lower end is closed with a male terminal connected thereto; A connector having a lead insertion hole corresponding to a cylindrical contact and a movable plate for bringing the lead into contact with the contact by moving laterally on the connector base, wherein the inner wall of the cylindrical contact is A ring part that can be fixed; and a contact part provided at the free end of the ring part, which extends obliquely along the vertically elongated cylindrical hole to an eccentric position on one end side of the inner diameter line of the cylindrical contact. a pair of elastic contact pieces disposed opposite each other for lead capture, and an inner contact configured to form an insertion space for the lead at a position eccentric to the other end of the inner diameter line, the lead to be inserted into the insertion space. The connector is characterized in that after the lead is inserted into the connector, the lead moves laterally together with the movable plate and comes into contact with the contact portion of the inclined elastic contact piece.