JP2562214Y2 - Terminal connection structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection structure, and more particularly to a terminal connection structure suitable for connecting a lead terminal of an electric / electronic component or a connection terminal of an electric connector to a printed board.

[0002]

2. Description of the Related Art An example of a conventional terminal connection structure used in a jig for high / low temperature screening will be described below.
Figure 8 is a structural view of a high cold screening jig, the jig is an electronic circuit unit and further to the hot temperature and + 80 degree ° C. of about -30 ° C., performs the function check of the electronic circuit unit , For detecting a defective product. When the jig is in a low-temperature and high-temperature atmosphere, a connection land portion of a printed board, which will be described later, is attached to the jig bottom and connected to the electronic circuit unit,
A probe 50 connected to a checker (not shown) comes into contact with the probe 50 to check the function of the electronic circuit unit. The electronic circuit unit 51 is an object to be inspected attached to an upper part of the jig 52. By attaching the electronic circuit unit 51 to the upper part of the jig 52, a connector 53 and a connector 54 connected to terminals of the electronic circuit unit 51 are attached to the jig 52. The connector 53 and the connector 54 are connected to the lead 53a and the lead 5
Connector 5 having angular female terminal 55a via 4a
5 is connected. A printed board 56 is fixed to the bottom of the jig 52 with the back side of the printed pattern facing downward. On the printed board 56, a male terminal 58 insert-molded in a resin holder 57 is mounted.

The upper end of the male terminal 58 is connected to the female terminal 5.
5a is in electrical contact. On the other hand, the rear end of the male terminal 58 is soldered to a connection land on the printed pattern surface of the printed board 56.

FIG. 9 is a cross-sectional view showing a terminal connection structure between the printed board 56 and the male terminal 58 in the high / low temperature screening jig 52 (the state of attachment to the jig 52 is shown upside down).

FIG. 10 is a perspective view showing the relationship between a male terminal 58 insert-molded in a resin holder 57 and a printed board 56. As shown in these figures, a male terminal 58 insert-molded into a resin holder 57.
After being inserted into the through hole 59 formed in the printed board 56, the distal end 58 a of the male terminal 58 projecting from the connection land 60 is soldered to the connection land 60. The solder layer 61 is formed on the connection land 60 so as to cover the tip 58 a of the male terminal 58.

[0006]

However, in such a conventional terminal connection structure, the high / low temperature screening jig 52 has a large temperature difference in use, and therefore, a metal male terminal is required. 58 and resin holder 5
The repeated stress (thermal stress) due to thermal expansion and contraction with the printed circuit board 7 and the printed board 56 concentrates on the soldered portion, cracks are generated in the soldered portion, and the solder layer 61 is separated from the connection land portion 60. There was a problem. Such a phenomenon was confirmed particularly when eutectic solder (KR19RA) or high-temperature solder (95% Pb) was used for a glass epoxy printed board.

Further, a flat washer made of brass having a hole diameter smaller than the diagonal dimension of the male terminal 58 is connected to the connection land portion 6.
The solder layer 61 is press-fitted and disposed on the tip end portion 58a of the male terminal 58 protruding from the zero side, and the flat washer and the male terminal 58 are attached.
May be formed on the connection land portion 60 so as to cover the front end portion 58a. However, in this case, there is a problem that a crack is generated in the outer peripheral solder portion of the flat washer made of brass.

The present invention has been made in view of such a conventional problem, and it is possible to prevent a thermal stress from being concentrated on a soldered portion and to provide a terminal connection structure having excellent durability against heat. It is intended to solve the above problems.

[0009]

SUMMARY OF THE INVENTION The present invention provides a connecting terminal and a connecting terminal.
Has connection lands to be soldered, and connection terminals are inserted
And a printed board with a through hole
Insert the connection terminal into the contact part that contacts the connection land.
An insertion hole is drilled, and a composite terminal is pressed around the insertion hole.
A press-fit connection member provided with a number of split claws, and this press-fit connection member
Solder that connects the connection terminal and the connection land to cover
Are provided.

[0010]

In the terminal connection structure of the present invention, the press-fit connection member press-fit to the connection terminal is buried in the solder layer formed between the connection terminal and the connection land. Because the member resists the tensile force of thermal stress and acts so that thermal stress does not concentrate on the soldered part,
The occurrence of cracks in the soldered portion and the separation of the solder layer from the connection lands are prevented.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 is a sectional view showing a terminal connection structure according to an embodiment of the present invention. FIG. 2 is a perspective view of a push-on nut which is a press-fit connection member of the present invention used in the terminal connection structure of this embodiment. FIG. 3 is a front view of the push-on nut, and FIG. 4 is a side view of the same.

In FIG. 1, a printed board 1 is provided with a through hole 2 such as a through hole. This through hole 2
It is open in the connection land 3. A male terminal 4 (connection terminal) having a rectangular cross section is inserted into the through hole 2. The tip 4 a of the male terminal 4 projects from the through hole 2.
The tip 4a has a push-on nut 5 (press-fit connection portion).
Material) is press-fitted to a position where it contacts the connection land 3.

The push-on nut 5 has a central part
As shown in FIGS. 2, 3, and 4, conical split claws 7a, 7b, 7c, and 7d that form the insertion hole 6 having a diameter slightly smaller than the diagonal dimension of the male terminal 4 are formed. The push-on nut 5 is manufactured by press-forming a phosphor bronze plate,
It is made of a conductive spring material.

Returning to FIG. 1, after inserting the tip 4a of the male terminal 4 insert-molded into the resin holder 9 into the through hole 2 of the printed board 1, the male terminal 4 protruding from the connection land 3 is formed. When the push-on nut 5 is pressed into the tip 4a of the male terminal 4 to a position where it comes into contact with the connection land 3, the tip 4a of the male terminal 4 projects from the center of the push-on nut 5. The part 3 is electrically connected by the solder layer 8 so as to cover the push-on nut 5.

Therefore, the thermal stress is not concentrated on the soldered portion by the push-on nut 5 without being concentrated, and the thermal stress is effectively absorbed by the spring property of the push-on nut 5. Cracks and peeling of the solder layer from the connection lands can be reliably prevented.

In the above-described embodiment, the push-on nut 5 is used as the press-fitting connection member. However, the present invention is not limited to this as long as it has the same function as the push-spring leaf nut (automobile standard JASO). The same effect can be obtained by using the circular external ring 11 shown in FIG. 5 or the P-type speed nut 12 shown in FIG. 5 and 6, 11a, 11b,
11c, 11d, 11e, 11f, 12a, and 12b are split nails.

FIG. 7 is a sectional view showing the structure of another example of a terminal connection structure. In this example, a structure in which a part of the push-on nut 5 pressed into engagement with the male terminal 4 is embedded in a solder layer 8 formed between the male terminal 4 and the connection land 3. It is what it was.

In each of the above embodiments, an example in which the present invention is used for a jig for high / low temperature screening has been described. However, similar effects can be obtained by applying the present invention to an electric component used in an environment having a large temperature difference. Demonstrate.

[0019]

[Effect of the invention] As described above, according to the invention, the connection
The terminal has a connection land that is soldered to the terminal.
Printed board with a through hole through the connection land
And the connection terminal is inserted into the contact part that contacts the connection land.
The connection terminal is pressed around the insertion hole.
Press-fit connection member provided with a plurality of split claws
Connect the connection terminal and the connection land to cover the member
Since it is configured to include solder , the press-fit connection member is
In the solder layer formed between the connection terminal and the connection land
Buried in the connector, the press-fit connection member resists the tensile force of thermal stress
To prevent thermal stress from concentrating on the soldered area.
Cracks in the soldered area and
This has the effect of preventing peeling from the connection land.
You.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a terminal connection structure according to an embodiment of the present invention.

FIG. 2 is a perspective view of a push-on nut used in the terminal connection structure.

FIG. 3 is a front view of a push-on nut.

FIG. 4 is a side view of the push-on nut.

FIG. 5 is a perspective view showing a circular external ring.

FIG. 6 is a perspective view showing a P-type speed nut.

FIG. 7 is a cross-sectional view illustrating a configuration of a terminal connection structure according to another embodiment.

FIG. 8 is a structural view of a jig for high / low temperature screening.

FIG. 9 is a cross-sectional view showing a conventional terminal connection structure between a printed board and a male terminal in a high / low temperature screening jig.

FIG. 10 is a perspective view showing a relationship between a male terminal insert-molded in a resin holder and a printed board.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Printed board 2 Through-hole 3 Connection land part 4 Male terminal (connection terminal) 5 Push-on nut (press-fit connection member) 6 Insertion hole 7a, 7b, 7c, 7d Split claw 8 Solder layer 9 Resin holder 11 Circular external 11・ Ring 12 P-type speed nut 11a, 11b, 11c, 11d, 11e, 11f, 1
2a, 12b Split nail

Claims (1)

(57) [Scope of request for utility model registration] 1. A connection land soldered to a connection terminal.
And a through hole through which the connection terminal is inserted.
The printed board drilled in the
An insertion hole for inserting the connection terminal is formed in the abutting part
And a plurality of split claws for pressing the connection terminal around the insertion hole.
And a press-fit connection member provided with
A solder connecting the connection terminal and the connection land portion;
Terminal connection structure provided with .