TWI525914B - Substrate to substrate connector - Google Patents

Description

Substrate to substrate connector

The present invention relates to a substrate-to-substrate connector that is mounted on a circuit board and that is mated with a counterpart connector to transmit an electrical signal. Specifically, it relates to an insertion force when the connectors are fitted to each other and an adjustment of the holding force at the time of releasing the fitting.

Patent Document 1 discloses a connector structure capable of obtaining a fitting holding force suitable for each pole number of a low-pole substrate-to-substrate connector to a multi-pole substrate-to-substrate connector, and discloses the following As a method of adjusting the fitting holding force, a step is provided at a contact portion of the connector, and an appropriate fitting holding force is obtained by changing the size of the step.

More specifically, the flat surface of the contact portion 31 of the plug contact 3 receives an elastic contact force from the curved portion 72b of the contact portion 72 of the socket contact 7, and the magnitude of the elastic contact force changes before and after passing through the step.

At the time of insertion, since the step is set such that the amount of elastic displacement of the contact portion 72 of the socket contact 7 is reduced, the elastic contact force is reduced by the step.

Since the elastic contact force acts as a holding force in the fitted state, an appropriate fitting holding force can be obtained by adjusting the step.

For example, it is disclosed that if the step depth with respect to the lower surface of the upper surface is increased, the fitting holding force becomes small, and if the step depth is decreased, the fitting holding force becomes large.

Prior art literature: patent literature

Patent Document 1: JP-A-2009-231046

However, the substrate-to-substrate connector shown in Patent Document 1 has the following problems.

The fitting holding force of the substrate to the substrate connector is a force acting in a state in which the plug contact 3 and the socket contact 7 are fitted, and is a force acting on the concave portion 31d when the contact points 72d and 72d abut.

Therefore, the contact point 72d slides on the step of the recess 31d, and the contact portion 72d may be worn or deformed, causing a problem in contact reliability.

In particular, when the steps are large, the risk of this problem is further increased.

Further, it is difficult to define the fitting holding force only by limiting the magnitude of the step depth. Actually, the fitting holding force is largely affected by the inclination angle of the inclined surface of the convex portion 31e of the connecting contact portion 31 and the concave portion 31d.

That is to say, if the slope is gentle, the fitting retention force may become small.

The present invention has been made in view of the above problems, and an object thereof is to provide an electrical connector having the following features.

(1) Structure for adjusting the fitting holding force without using the contact portion for electrical connection

(2) Ensure stable mating retention

A substrate-to-substrate connector in which a plug 10 mounted on a circuit board and a socket 20 mounted on another circuit board are electrically connected to each other to electrically connect the circuit board to each other at a holding plate portion 12a of the plug terminal 12 of the plug 10. Or, one of the holding plate portions 22a of the socket terminal 22 of the socket 20 is formed with a concave portion, and the other portion is formed with a convex portion.

In the substrate-to-substrate connector having the holding force by the concave portion and the convex portion, the convex portion has a trapezoidal cross section, and the height t, the inclination angle θ1 of the inclined surface in the insertion direction, and the inclined surface of the extraction direction are changed. The inclination angle θ2 is used to adjust the insertion force and the holding force of the plug 10 and the socket 20 in accordance with the number of poles of the terminal.

According to the present invention, the following substrate-to-substrate connector can be realized.

(1) Since the contact portion is not used to adjust the holding force, the contact reliability is not affected by the wear of the contact portion.

(2) Since the holding force is adjusted without using the elasticity of the joint, it is possible to ensure a stable holding force without being affected by elastic deformation or the like.

10‧‧‧ plug (substrate-to-substrate connector)

11‧‧‧ plug housing

12‧‧‧ Plug terminal

12a‧‧‧Main board

12b‧‧‧Contacts

12c‧‧‧Terminal Department

13‧‧‧ recess

20‧‧‧ socket (substrate to substrate connector)

21‧‧‧ socket housing

22‧‧‧ socket terminal

22a‧‧‧Main board

22b‧‧‧Contacts

22c‧‧‧Terminal Department

22d‧‧‧Fixed Department

23‧‧‧ convex

[Fig. 1] is a perspective view of the plug 10

[Fig. 2] is a perspective view of the socket 20.

[Fig. 3] is the plug terminal 12

[Fig. 4] is the socket terminal 22

[Fig. 5] is a different type of size setting diagram of the convex portion 23.

[Fig. 6] is a mosaic view of the substrate-to-substrate connector

The structure, features and other objects of the present invention will be further described in the following detailed description of the preferred embodiments of the present invention. It is not the only restriction on patent applications.

Please refer to Figure 1 to Figure 6 for the description of the implementation, such as the first As shown, the plug 10 is composed of a plug housing 11 and a plurality of plug terminals 12.

As shown in Fig. 3, the plug terminal 12 is a terminal obtained by press working a copper alloy.

The plug terminal 12 is composed of a terminal portion 12c for soldering with a circuit board, a holding plate portion 12a rising at right angles to the terminal portion 12c, and a contact portion 12b formed by bending the holding plate portion 12a.

A recess 13 having a depth of 0.02 mm is provided on the holding plate portion 12a.

Further, the surface of the holding plate portion 12a and the step of the concave portion 13 have a chamfer of 45°.

Further, the terminal portion 12c and the contact portion 12b are plated with gold.

As shown in FIG. 2, the socket 20 is composed of a socket housing 21 and a plurality of socket terminals 22.

As shown in Fig. 4, the socket terminal 22 is a terminal obtained by press working a copper alloy.

The socket terminal 22 includes a terminal portion 22c for soldering to the circuit board, a fixing portion 22d rising at right angles to the terminal portion 22c, a fixing portion 22dU being bent to form a holding plate portion 22a, and a holding plate portion 22aB bent. The contact portion 22b formed in turn is formed.

The contact portion 22b is a spring having a cantilever beam shape.

The holding plate portion 22a is provided with a convex portion 23 having a trapezoidal cross section.

Further, the terminal portion 22c and the contact portion 22b are plated with gold.

In general, the substrate-to-substrate connector is provided with a series of poles of various types of terminals. For example, in the present embodiment, it has a multipole type of 10 poles from a low pole type to a 70 pole type.

In the case where all the terminals have the same shape, the insertion force and the holding force of the multi-pole type are large, and the insertion force and the holding force of the low-pole type are small.

Therefore, the multi-pole type of insertion and removal work may be difficult, and the low-pole type may cause problems such as the fall of the fitting due to insufficient holding force.

With regard to such a problem, in the present embodiment, three types of terminals having different shapes of the convex portions 23 are prepared in accordance with the number of poles of the socket terminals 22 to cope with the above problem, and the convex portion 23 is hereinafter described with reference to FIG. The shape (set size) is explained.

By partially exchanging a part of the press die, the height t of the convex portion 23, the inclination angle θ1 of the inclined surface in the insertion direction, and the inclination angle θ2 of the inclined surface in the extraction direction can be changed.

The set size of type 1 is: t(1) = 0.04 mm, θ1 (1) = 58°, and θ2 (1) = 25°.

The set size of type 2 is: t(2) = 0.02 mm, θ1 (2) = 25°, and θ2 (2) = 15°.

The set size of type 3 is: t(3)=0.01 mm, θ1(3)=21°, θ2(3)=8°.

Further, the dimensional tolerance of the height t is ±0.005 mm, and the dimensional tolerance of the inclination angles θ1, θ2 is ±3°.

Type 1 has a high height and a large inclination angle of the slope, so that the insertion force and the holding force can be made large.

Type 3 has a lower height and a smaller inclination angle of the slope, so that the insertion force and the holding force can be made smaller.

The insertion force and retention force of type 2 are approximately in the middle of type 1 and type 2.

Table 1 is a setting table of the types of the socket terminals 22 used for the sockets 20 of the respective pole numbers.

Specifically, in the low-pole type in which the number of poles is 10 poles and 14 poles, by using the socket terminal 22 of the type 1, the insertion force of the mating substrate to the plug 10 of the board connector and the socket 20 can be released. The retention of the time is increased.

In the multipole type having a pole number of 32 to 70 poles, the insertion force and the holding force can be lowered by using the type 3 socket terminal 22.

In addition, when the number of poles is between 16 and 30 poles in the middle, by using the type 2 socket The terminal 22 is capable of adjusting the insertion force and the holding force.

In the present embodiment, the plug portion 12 is provided with the recess 13 and the socket terminal 22 is provided with the convex portion 23. However, the plug terminal 12 may be provided with a convex portion, and the socket terminal 22 may be provided with a concave portion.

Further, the recess 13 may also be a through hole.

Further, the contact portion 22b has an elastic shape, but the contact portion 12b may have elasticity.

Fig. 6 is a cross-sectional view showing a state in which the plug 10 of the substrate-to-substrate connector is fitted to the socket 20.

In the fitted state, the concave portion 13 is engaged with the convex portion 23.

The contact portion 12b is in electrical contact with the contact portion 22b at the time of fitting. However, since neither the contact portion 12b nor the contact portion 22b slide on the concave portion 13 or the convex portion 23, the contact reliability is not greatly affected.

In summary, the present invention can achieve the above functions and purposes, so the present invention should meet the requirements of the patent application, and apply in accordance with the law.

12c. . . Terminal part

13. . . Concave

twenty two. . . Socket terminal

22b. . . Contact

22c. . . Terminal part

twenty three. . . Convex

Claims (1)

A substrate-to-substrate connector that fits a plug mounted on a circuit substrate and a socket mounted on another circuit substrate to electrically connect the circuit substrates to each other, wherein in the substrate-to-substrate connector, the plug terminal of the plug includes a terminal portion of the plug terminal is a holding plate portion rising at right angles, and the socket terminal of the socket includes a fixing portion rising at right angles to the terminal portion of the socket terminal, the fixing portion being bent in a U shape to form a holding plate portion, at the plug One of the holding plate portions of the plug terminal or the retaining plate portion of the socket terminal of the socket is formed with a concave portion, and the other portion is formed with a convex portion, and the concave portion is engaged with the convex portion to have a holding force, and the convex portion is broken. The surface is trapezoidal, and the insertion force of the plug and the socket is adjusted according to the number of poles of the terminal by changing the height (t), the inclination angle of the slope of the insertion direction (θ1), and the inclination angle of the slope of the extraction direction (θ2). And retention.