JP2000294319A - Board connection terminal - Google Patents

Abstract

(57) [Problem] To provide a board connection terminal that is small and thin and hard to be affected by heat or external force and can be used as a power wiring terminal. SOLUTION: One of upper and lower protruding portions protruding from a main body portion so as to sandwich a substrate is fixed to the main body portion, and the other protruding portion approaches one of the protruding portions. And a pair of fixed pieces provided on both left and right sides of the elastic piece and having a fixed relative position in the thickness direction of the substrate to one of the protrusions. A structure in which the relative position in the thickness direction between the substrate and the terminal is substantially defined by the projection and the fixing piece of the other projection, and the play between the two pieces and the substrate is removed by the biasing force of the elastic piece. Therefore, even if heat or external force is applied, the relative positions of the two pieces and the substrate hardly change, so that the contact pressure due to the urging force of the elastic pieces is secured, and the terminal can be used as a power-system wiring terminal. In addition, since the terminal directly contacts the electrode pad on the substrate, the connection portion is reduced in size and thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate terminal for directly connecting external wiring to a substrate on which an electrode pattern is formed.

[0002]

2. Description of the Related Art Conventionally, for example, a coupler is generally used for connecting a wiring board to the outside. However, a couplerless connection for directly connecting a female coupler to the board is also used for some devices, for example, a control board for an automobile. Used to connect to external circuits.

[0003] This couplerless connection is smaller and thinner than a coupler in which a male coupler is fitted into a female coupler, and the number of parts can be reduced.

As a terminal for connecting to a substrate in a conventional couplerless connection, a tip of one plate is divided into three to form three projections, and the tip is curved, and projections at both ends are formed. There is a so-called tulip terminal in which the substrate is sandwiched between the substrate and an intermediate protrusion.

[0005]

However, since the above-mentioned terminals only elastically sandwich the substrate, the contact pressure is low due to the influence of external force or heat unless the contact portion is separately protected. In some cases, there was a concern that contact failure would occur. In particular, it could not be used as a terminal for power wiring such as a power supply terminal that easily generates heat.

SUMMARY OF THE INVENTION The present invention has been devised to solve the above-mentioned problems of the prior art, and has been made smaller, thinner, less susceptible to heat and external force, and has been developed for power wiring. It is an object of the present invention to provide a board connection terminal that can be used as a terminal.

[0007]

According to the present invention, there is provided a substrate connecting terminal for directly connecting external wiring to a substrate on which an electrode pattern is formed, the terminal being provided so as to sandwich the substrate. It has upper and lower protrusions protruding from the main body portion, and one of the upper and lower protrusions is composed of a fixing piece fixed to the main body portion, and the upper and lower protrusions are Either one of the elastic pieces is urged in a direction approaching the one protrusion, and the elastic piece is provided on each of the left and right sides of the elastic piece, and a relative position in the thickness direction of the substrate with respect to the one protrusion. This is achieved by providing a terminal for connecting a board, which comprises a pair of fixed pieces to which is fixed. In particular, it is preferable that the main body portion and the respective pieces are formed by bending one sheet metal.

[0008]

Preferred embodiments of the present invention will be described below.

FIG. 1 shows a substrate 1 for controlling blinking of a blinker or a hazard lamp of an automobile to which the present invention is applied.
FIG. 2 is an exploded perspective view showing a structure of a coupler-less connection portion between a lamp, a switch, and a power supply (not shown) and three lead wires L1 to L3. FIG. 2 is a sectional side view of a main part of the coupler-less connection portion. The substrate 1 is a printed wiring board, and three electrode portions 1a for connecting to the substrate connection terminals 2 according to the present invention are formed on the edge thereof.

The three terminals 2 connected to the electrode portion 1a are formed by deforming a conductive metal plate, and a lower projection 22 and an upper projection projecting from the main body portion 21 so as to sandwich the substrate 1 therebetween. 23 and a lead grip 24 at the rear end.

Here, the lower protruding portion 22 is located close to the substrate 1 /
A pair of fixing pieces 22a, 2a, 2b provided at the left and right ends which are hardly deformed in the direction in which they are separated, that is,
2b. The upper protrusion 23 protrudes from the main body portion 21 and is provided on both left and right sides of the elastic piece 23a urged by its own urging force in a direction approaching the lower protrusion 22. Projection pieces 22a, 22 of side projection 22
b, a pair of fixed pieces 23b whose relative positions are fixed to b.
23c. The elastic piece 23a is formed by bending a flat plate portion into a U-shape, and can have a larger stroke than simply using the flat plate shape as a leaf spring. The elastic piece 23a has a slit formed from its base end to its tip, and is divided into two. Thereby, the electrode portion 1a
Even if there is unevenness, not only a reliable contact can be obtained by following the unevenness, but also if a foreign substance is caught between one of the divided tongue pieces of the elastic piece 23a and the electrode portion 1a, the other tongue piece is surely made. Contacts the electrode section 1a.

The three terminals 2 are received by a cylindrical holder 3 divided vertically (3a, 3b) in a state where the ends of the lead wires L1 to L3 are gripped by the lead gripping portion 24 at the rear end. . The holder 3 has slits 31 for guiding the substrate 1 when connecting the substrate 1 to each terminal 2 when the substrate 1 is inserted into the holder.
Are formed. A cover 4 for protecting the substrate 1 and each terminal 2 is fitted to the holder 3 with the substrate 1 inserted into the holder 3. It is preferable that the holder 3 is provided with a flange or the like for attaching the holder 3 to the vehicle body.

To connect the board 1 and the terminal 2 in the couplerless connecting section, the board 1 is inserted into a holder 3 fixed to a vehicle body or the like (not shown) from an opening side thereof.
While being guided by the slit 31, the end of the substrate 1 is connected to each terminal 2
Between the lower projection 22 and the upper projection 23 of the substrate 1
Is brought into contact with the upper protrusion 23. Then, the cover 4 may be fitted to the holder 3.

In this state, the position of the substrate 1 in the width direction is defined by the holder 3. Further, a certain position in the thickness direction is also defined by the slit 31 of the holder 3. Further, the relative position in the thickness direction between the end of the substrate 1 and each terminal 2 is determined by fixing pieces 22a, 22b and fixing pieces 23b, 23c.
, And is urged to one side by the elastic piece 23a. Therefore, even if heat or external force is applied to this portion, the fixing pieces 22a and 22b are not easily deformed in the thickness direction.
And the fixing pieces 23b and 23c sandwich the end of the board 1, the relative position between the two pieces and the board 1 does not change, and the board is easily deformed as in the case where the board is sandwiched only by the elastic pieces. There is no fear that the contact state cannot be maintained or the contact pressure is significantly reduced. Unlike the case of joining, the attachment / detachment of the substrate is easy.

[0015]

As is apparent from the above description, according to the board connection terminal of the present invention, one of the upper and lower protrusions projecting from the main body so as to sandwich the board is formed by the main body. An elastic piece fixed to the portion and urged in the direction in which the other protrusion approaches the one protrusion; provided on both left and right sides of the elastic piece; It is composed of a pair of fixed pieces whose relative position in the thickness direction is fixed, and the relative position in the thickness direction of the substrate and the terminal is substantially defined by the fixing piece of one protrusion and the other protrusion. By adopting a structure in which the play between the piece and the substrate is removed by the biasing force of the elastic piece, the relative position between the two pieces and the board hardly changes even when heat or an external force is applied. The contact pressure due to the force is also secured, and it can be used as a terminal for power system wiring. In addition, since the terminal directly contacts the electrode pad on the substrate, the connection portion is reduced in size and thickness. In addition, by forming the main body portion of the terminal and each piece by bending one sheet metal, the manufacture and positioning of each piece are facilitated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a structure of a couplerless connection between a board of an automobile to which the present invention is applied and a lead wire.

FIG. 2 is a sectional side view of a main part of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 1a Electrode part 2 Substrate connection terminal 21 Main part 22 Lower projection 22a, 22b Fixed piece 23 Upper projection 23a Elastic piece 23b, 23c Fixed piece 24 Lead gripping part 3 Holder 3a Holder upper part 3b Holder lower part 31 Slit 4 Cover L1-L3 Lead wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideaki Kanaya 1-2681, Hirosawa-cho, Kiryu-shi, Gunma F-term in Mitsuba Co., Ltd. 5E023 AA04 AA13 AA16 AA18 BB01 BB03 BB13 BB22 BB25 EE07 EE09 EE27 FF11 GG02 HH01 H08

Claims (2)

[Claims] 1. A substrate connection terminal for directly connecting external wiring to a substrate on which an electrode pattern is formed, the terminal having upper and lower protrusions projecting from a main body portion so as to sandwich the substrate. One of the upper and lower protrusions is a fixed piece fixed to the main body portion, and the other of the upper and lower protrusions is in a direction approaching the one protrusion. A biased elastic piece, and a pair of fixed pieces provided on both left and right sides of the elastic piece, the relative position in the thickness direction of the substrate to the one protrusion is fixed. Board connection terminal. 2. The board connection terminal according to claim 1, wherein the main body portion and each of the pieces are formed by bending one sheet metal.