JP2012119210A - Card edge connector and electric circuit component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably connect a slave substrate and a connection terminal to each other by preventing the intrusion of foreign objects into a card edge connector.SOLUTION: Wipe parts 13c of both connection terminals 13A and 13B have flat parts 13s which are parallel to each other when a slave substrate 30 is not inserted. The connection terminals 13A and 13B are configured such that the flat parts 13s and 13s are abutted against each other by elasticity when the slave substrate 30 is not inserted. Consequently, foreign objects, etc. are prevented from intruding from an open side of a slot 11b into a space between the connection terminals 13A and 13B.

Description

  The present invention relates to a card edge connector and an electric circuit component suitable for use when a card-like child board is mounted on a parent board.

  When a card-like child board is mounted on the parent board, a card edge connector is provided on the parent board, and the board edge of the child board is inserted into the card edge connector to be electrically connected. ing.

2A and 2B are diagrams showing a card edge connector related to the present invention, in which FIG. 2A is a cross-sectional view showing a state where a sub-board is not inserted, and FIG. 2B is a cross-sectional view showing a state where the sub-board is inserted. is there.
As shown in FIG. 2A, the card edge connector 1 is mounted on a printed circuit board 5. The card edge connector 1 is provided with a pair of connection terminals 3 </ b> A and 3 </ b> B inside a housing 2.

The connection terminals 3A and 3B penetrate the bottom surface of the housing 2, are inserted into through holes 6 formed in the printed circuit board 5, and are electrically connected to the wiring pattern of the printed circuit board 5 by soldering or the like.
The connection terminals 3 </ b> A and 3 </ b> B are formed with conductive contact portions 4 </ b> A and 4 </ b> B that are curved in the housing 2 so as to approach each other.

  On the other hand, the card-like child substrate 8 inserted into the card edge connector 1 has conductive pads 9a and 9b on both surfaces of the end 8a. When such a child board 8 is inserted into the card edge connector 1, the connection terminals 3A and 3B are pushed away from each other by the end 8a of the child board 8, and the conductive pads 9a and 9b are displaced toward the printed board 5 side. I will do it. Then, as shown in FIG. 2B, when the sub board 8 is inserted until it hits the stopper 7 provided in the housing 2, the conduction pads 9a and 9b come into contact with the conduction contact portions 4A and 4B, and the card edge connector. 1 wiring and the wiring of the printed circuit board 5 are electrically connected via the connection terminals 3 </ b> A and 3 </ b> B of the card edge connector 1.

By the way, in such a card edge connector 1, foreign matter or the like adheres to the conductive pads 9a and 9b, or foreign matter enters between the connection terminals 3A and 3B in the housing 2, so that the conductive contact portion 4A, There is a possibility that the electrical connection between 4B and the conductive pads 9a and 9b is not reliably performed.
Therefore, as in the configurations described in Patent Documents 1, 2, and 3, when the sub board 8 is inserted into the card edge connector 1, the connection terminals 3A and 3B slide on the conduction pads 9a and 9b of the sub board 8. A technique for moving and wiping both contact surfaces has been proposed.

JP-A-9-148209 JP 2004-356096 A JP 2009-199859 A

However, foreign matter such as dust is likely to enter the housing 2 of the card edge connector 1. When the inserted foreign object is inserted in the state where the foreign matter has entered the conductive pads 9a and 9b and the connection terminals 3A and 3B, the foreign matter is caught in the conductive contact portions 4A and 4B, and the conductive contact portion 4A. 4B may be mechanically damaged.
Accordingly, an object of the present invention is to provide a card edge connector and an electric circuit component capable of preventing the entry of foreign matter into the card edge connector and reliably connecting the sub board and the connection terminal. is there.

The present invention employs the following means in order to solve the above problems.
That is, the card edge connector of the present invention includes a housing provided on the parent board and a pair of connecting terminals provided in a slot formed in the housing and having a proximal end passing through the housing and being fixed to the parent board. And the connection terminal is provided on the opening side of the slot with respect to the conductive contact portion that contacts the wiring pattern at the end portion of the sub board inserted into the slot, and on the other side of the mating contact. And a protruding portion protruding toward the connecting terminal, wherein the protruding portions of the two connecting terminals that are paired are in contact with each other in a state in which the daughter board is not inserted into the slot.

  The present invention can also be an electric circuit component in which the card edge as described above is mounted on a substrate.

  According to the present invention, since the protruding portions of the two connecting terminals that are paired are in contact with each other in a state in which the child board is not inserted into the slot, it is possible to prevent foreign matter from entering the card edge connector and It is possible to reliably connect the substrate and the connection terminal.

It is a figure which shows the card edge connector which concerns on embodiment of this invention, Comprising: (a) is sectional drawing which shows the state which has not inserted the sub board | substrate, (b) is sectional drawing which shows the state which inserted the sub board | substrate. It is a figure which shows the card edge connector relevant to this invention, Comprising: (a) is sectional drawing which shows the state which has not inserted the sub board | substrate, (b) is sectional drawing which shows the state which inserted the sub board | substrate.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited only to the following embodiments. 1A and 1B are diagrams showing a card edge connector according to an embodiment of the present invention, in which FIG. 1A is a cross-sectional view showing a state in which a sub-board is not inserted, and FIG. 1B is a cross-sectional view showing a state in which a sub-board is inserted. It is.

  As shown in FIG. 1, the card edge connector 10 is mounted on a printed circuit board 20 to constitute an electric circuit component. The card edge connector 10 is provided with a pair of connection terminals 13A and 13B as a pair inside the housing 11.

  The housing 11 has a bottom 11a on the printed board 20 side, and a slot 11b into which the end 30a of the sub board 30 is inserted opens on the side away from the printed board 20. The slot 11b is formed in accordance with the length (width) of the sub board 30. A plurality of pairs of connection terminals 13A and 13B are provided in such a slot 11b with an interval in the direction in which the slots 11b continue.

  Each of the connection terminals 13A and 13B has a base portion 13a that passes through the bottom portion 11a of the housing 11 and is inserted into a through hole 21 formed in the printed board 20, and is electrically connected to the wiring pattern of the printed board 20 by soldering or the like. It is connected to the. Further, the connection terminals 13A and 13B are provided in the slot 11b of the housing 11 so as to extend from the base 13a side toward the opening side of the slot 11b.

  Each of the connection terminals 13A and 13B includes a conduction contact portion 13b that is curved or bent so as to protrude from the base portion 13a to the connection terminal 13B or 13A on the other side, and is closer to the opening side of the slot 11b than the conduction contact portion 13b. And a wipe part (protrusion part) 13c that is positioned and curved or bent so as to protrude to the connection terminals 13B and 13A on the other side. And each front-end | tip part 13d of connection terminal 13A, 13B is inclined and formed in the direction away from the other party connection terminal 13B, 13A with respect to the wipe part 13c.

In the slot 11b, the connection terminals 13A and 13B as described above are provided so as to face each other, and the connection terminals 13A and 13B are in contact with or close to each other at two points of the conduction contact part 13b and the wipe part 13c. ing.
Here, as shown in FIG. 1A, in the connection terminals 13A and 13B, both wipe parts 13c have flat parts 13s that are parallel to each other in a state where the child substrate 30 is not inserted. . The connection terminals 13A and 13B have their flat portions 13s and 13s abutted against each other (pressed against each other) due to their elasticity in a state in which the sub board 30 is not inserted.

In such a card edge connector 10, as described above, as shown in FIG. 1A, the flat portions 13s of the two wipe portions 13c abut each other when the daughter board 30 is not inserted. ing. Thereby, it can prevent that a foreign material etc. penetrate | invade between connection terminal 13A, 13B from the opening side of the slot 11b.
When the end portion 30a of the sub board 30 is inserted between the connection terminals 13A and 13B from the opening of the slot 11b, first, since both the tip portions 13d are inclined in the direction of separating from each other, the connection terminal 13A. , 13B can be easily inserted into the sub board 30.
When the sub board 30 is further inserted, the conductive pads (wiring patterns) 31 formed on both surfaces of the sub board 30 are rubbed by the wipe portions 13c and 13c, and foreign matters or the like attached to the conductive pad 31 are rubbed off. .
As shown in FIG. 1B, when the sub board 30 is inserted until the end portion 30a hits the stopper 16 provided on the bottom portion 11a of the housing 11, the sub board 30 is inserted into the conduction contact portions 13b and 13b of the connection terminals 13A and 13B. The conductive pads 31 and 31 are in contact with each other, and the wiring of the sub board 30 and the wiring of the printed board 20 are electrically connected via the connection terminals 13A and 13B of the card edge connector 10.

As described above, in the card edge connector 10, the flat portions 13s of the two wipe portions 13c abut each other in a state where the daughter board 30 is not inserted, and thereby, foreign matter or the like from the opening side of the slot 11b. Can be prevented from entering between the connection terminals 13A and 13B. Therefore, foreign matter can be prevented from being sandwiched between the conductive pads 31, 31 and the connection terminals 13A, 13B, and the connection terminals 13A, 13B can be prevented from being damaged, and the connection to the child board 30 can be reliably performed. Become.
In the wipe part 13c, since the flat parts 13s are in contact with each other, a large contact area between the flat parts 13s can be ensured in a state where the child board 30 is not inserted. As a result, the connection terminals 13A and 13B can be reliably closed, and the entry of foreign matter can be more reliably prevented.

The card edge connector 10 of the present invention is not limited to the above-described embodiments described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, the shape of the connection terminals 13A and 13B may be any shape as long as it does not depart from the gist of the present invention. For example, the connection terminals 13A and 13B have a configuration in which the flat portions 13s of the wipe portion 13c are opposed to each other. However, the present invention is not limited to this. For example, a projection is formed on one of the connection terminals 13A and 13B and a recess is formed on the other. However, these convex portions and concave portions may be engaged with each other. In addition to this, the shape of the wipe portion 13c may be any shape as long as foreign matter can be prevented from entering between the connection terminals 13A and 13B from the outside.

  In the above-described embodiment, the flat portions 13s of the connection terminals 13A and 13B are formed so as to be parallel to each other, and the flat portions 13s are in surface contact with each other. It is also possible to have a configuration in which the line is formed so as to intersect with the line. Or you may make it the structure which abbreviate | omits the flat part 13s of one or both of connection terminal 13A, 13B, and makes it line-contact.

  In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

DESCRIPTION OF SYMBOLS 10 Card edge connector 11 Housing 11a Bottom part 11b Slot 13A, 13B Connection terminal 13a Base part 13b Conductive contact part 13c Wipe part (protrusion part)
13d Tip portion 13s Flat portion 16 Stopper 20 Printed circuit board 21 Through hole 30 Sub-board 30a End portion 31 Conductive pad (wiring pattern)

Claims (3)

A housing provided on the parent substrate;
A pair of connection terminals provided in a slot formed in the housing and having a base end portion penetrating the housing and fixed to the parent substrate,
The connection terminal is provided on the opening side of the slot with respect to the conductive contact portion that contacts the wiring pattern at the end portion of the sub board inserted into the slot, and on the opening side of the slot from the conductive contact portion. A protruding portion that protrudes toward the connection terminal, wherein the protruding portions of the two connection terminals that are paired are in contact with each other in a state where the child board is not inserted into the slot. Card edge connector.   A flat portion is formed in the protruding portion, and the flat portions of the protruding portions of the two connecting terminals to be paired are in contact with each other in a state in which the sub-board is not inserted into the slot. The card edge connector according to claim 1.   An electrical circuit component comprising the card edge according to claim 1 mounted on a substrate.

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