JP3403604B2 - Connection terminal fixing 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 connection terminal fixing structure in which both ends of a connection terminal having pressure contact portions for pressure-connecting electric wires are fixed to a printed circuit board and a wiring board, respectively.

[0002]

2. Description of the Related Art Conventionally, female connection terminals have been used to connect a printed circuit board for mounting electronic parts to a wiring board of a junction box. This will be specifically described with reference to FIG. 9. Female connection terminals 2 are fixed on the printed circuit board 1 by soldering. The connection terminal 2 has a box-shaped receiving tube portion 2a for receiving the tab terminal 3 of the wiring board of the junction box. A pair of elastic holding pieces 2b, 2b that come into contact with the tab terminals 3 are formed on the upper side of the receiving tube portion 2a by bending, and a pair of soldering pieces to be soldered to the printed circuit board 1 is provided on the lower side of the receiving tube portion 2a. The lead terminals 2c, 2c are formed by bending.

Then, the tab terminal 3 of the wiring board of the junction box is inserted from below the printed circuit board 1 through the insertion hole 1a of the printed circuit board 1 and sandwiched between the pair of elastic holding pieces 2b, 2b of the connection terminal 2. As a result, the printed circuit board 1 and the wiring board of the junction box are electrically connected.

FIG. 10 shows a structure in which another conventional printed circuit board and a wiring board of a junction box are connected to each other. The lower side of the female terminal 2'is fixed to the printed circuit board (not shown) by soldering. is there. The male terminal 3'on the wiring board side protruding into the space between the wiring board of the junction box and the printed board is received in the receiving tube portion 2a 'on the upper side of the female terminal 2'. The wiring board of the box is electrically connected. These similar structures are disclosed in Japanese Utility Model Laid-Open No. 4-88666 and Japanese Patent Laid-Open No. 2525/1987
It is disclosed in Japanese Patent No. 9366.

[0005]

However, in the conventional connection structure between the printed circuit board and the wiring board of the junction box, the female terminals 2, 2'and the male terminals 3, 3 are provided.
Since the two terminals 3'are indispensable, the number of parts is increased, the structure is complicated, and the cost is increased. further,
In the conventional connection structure shown in FIG. 9, since the tab terminal 3 is inserted from below the female connection terminal 2, an unreasonable load is applied to the soldered portion of the connection terminal 2 and cracks or the like occur in the soldered portion. Or the female connecting terminal 2 uses the spring force of the pair of elastic holding pieces 2b, 2b for contact with the tab terminal 3, so that the pair of elastic holding pieces 2b may change due to temperature change or the like.
There is a risk that the b and 2b may be deformed to cause poor contact with the tab terminal 3.

Therefore, the present invention has been made to solve the above-mentioned problems, and provides a connection terminal capable of reliably electrically connecting a printed circuit board and a wiring board through the connection terminal with a simple structure. It is intended to provide a fixed structure.

[0007]

According to a first aspect of the present invention, one end side of a connection terminal is fixed to a printed circuit board for mounting electronic parts by soldering, and the other end side of the connection terminal is used for electric wire wiring. In the connection terminal fixing structure in which the both ends of the connection terminal are fixed to the printed circuit board and the wiring board by forming a pressure contact portion for connecting the electric wires of the wiring board by pressure connection , fold it to the other end side of the connection terminal. A bent spring part is provided, and further
The tip side is bent to form the locking portion and the press contact portion, respectively, while the wiring board is formed with an engaging hole into which the locking portion of the connection terminal is inserted and locked. When the locking portion of the connection terminal is inserted and locked, the pressure contact portion of the connection terminal is projected onto the wiring board.

In this connection terminal fixing structure, when the engaging portion on the other end side of the connecting terminal whose one end side is soldered to the printed board is inserted into the engaging hole of the wiring board and is engaged, the connecting terminal is printed. It is easily fixed to the board and wiring board. At this time, since the pressure contact portion of the connection terminal projects onto the wiring board, a sufficient pressure contact height of the wire is secured, and the wire is easily connected to the pressure contact portion to ensure electrical connection between the printed circuit board and the wiring board. To be done.

A second aspect of the present invention is the connection terminal fixing structure according to the first aspect, wherein the pressure contact portion of the connection terminal is bent and formed perpendicularly to the wiring board, and the pressure contact is bent vertically. It is characterized in that a U-shaped press-contact blade for press-connecting the electric wire is formed on the portion, and the locking portion is formed on the tip end side of the press-contact portion.

In this connection terminal fixing structure, since the pressure contact blade of the pressure contact portion of the connection terminal is formed only on the side fixed vertically to the wiring board, when the pressure contact connection of the wire pressure contact portion to the pressure contact blade is performed. The pressure contact portion is securely fixed, no force is applied to the printed circuit board when the electric wire is pressure-contacted, and defects such as cracks do not occur in the soldered portion between the printed circuit board and the connection terminal.

According to a third aspect of the present invention, one end side of the connection terminal is fixed to a printed circuit board for mounting electronic parts by soldering, and the other end side of the connection terminal is pressure-welded with an electric wire of a wiring board for electric wire wiring. In a connection terminal fixing structure in which press-connecting portions to be connected are formed and both ends of the connection terminals are fixed to the printed board and the wiring board, respectively, a locking portion is provided at an intermediate portion of the connection terminals , Between the stop and the one end side
Rutotomoni provided a curved spring portion, while forming the contact portion on the other end of said connecting terminal, said connecting terminal locking portion is inserted in the fixation member which is disposed under the wiring board locking Is formed, and the press-contact portion of the connection terminal is projected onto the wiring board when the engagement portion of the connection terminal is inserted and locked in the engagement hole.

In this connecting terminal fixing structure, when the engaging portion of the connecting terminal, which is soldered to the printed circuit board at one end side, is inserted into the engaging hole of the fixed member and is engaged, the connecting terminal is printed. It is easily fixed to the substrate and the fixed member. At this time, since the pressure contact portion of the connection terminal projects onto the wiring board, a sufficient pressure contact height of the wire is secured, and the wire is easily connected to the pressure contact portion to ensure electrical connection between the printed circuit board and the wiring board. To be done.

According to a fourth aspect of the present invention, there is provided the connection terminal fixing structure according to the third aspect, wherein the pressure contact portion of the connection terminal is formed by bending the other end side of the connection terminal by 180 ° to mate it. It is characterized in that a U-shaped press-contact blade for press-connecting the electric wire is formed at the press-fitted portion which is bent and combined.

In this fixing structure of the connection terminal, since the pressure contact blade is formed at the portion where the pressure contact portion of the connection terminal is bent by 180 ° and joined together, the wire contact area at the time of pressure contact connection of the wire pressure contact portion to the pressure contact blade is large. The electric wire is securely connected by the press contact portion.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a fixing structure of a connection terminal according to an embodiment of the present invention. This connection terminal 10 is shown in FIG.
As shown in FIG. 2, a narrow portion 12 is cut out at the lower end (one end) of a conductive metal plate-shaped base 11. This narrow portion 12 has an insertion hole 3 of the printed circuit board 30 for mounting electronic components.
1 and is fixed to the printed circuit board 30 by soldering (this soldered portion is indicated by symbol H). Further, the bending spring portion 13 bent at about 45 ° is provided on the upper end (other end) side of the base portion 11 of the connection terminal 10.
A press-contact portion 14 for press-connecting and connecting the electric wire W of the wiring board 40 for electric wire wiring in the junction box 4, and a locking portion 15 which is inserted and locked in the engaging hole 44 of the wiring board 40.
Each is bent and formed. The press-contact portion 14 of the connection terminal 10 is formed by bending the bending spring portion 13 by about 45 ° so as to stand upright with respect to the wiring board 40. A U-shaped press-contact blade 14a for press-connecting the electric wire W is formed from the upper end of the center of the press-contact part 14 to the locking part 15 side. Further, the lower end (tip) of the pressure contact portion 14 of the connection terminal 10
The engaging portion 15 is formed by bending the side further inward by 90 °. The bending spring portion 1 of the connection terminal 10
3, a rectangular wire insertion hole 13a wider than the U-shaped pressure contact blade 14a of the pressure contact portion 14 is formed so as to be connected to the pressure contact blade 14a.

As shown in FIG. 1, the lower side of the printed circuit board 30 is covered with a substrate cover 32 made of synthetic resin. The wiring board 40 includes a synthetic resin wire laying lower layer 41, a synthetic resin wire laying upper layer 42 laminated on the wire laying lower layer 41, and a bus bar embedded in the wire laying lower layer 41. It is composed of 43 and the like. The engagement hole 44 formed so as to penetrate through each of the layers 41, 42 is a hollow space having a substantially rectangular prism shape, and a taper surface 44a is formed on the electric wire wiring lower layer 41 side. A concave portion 44 is formed on the upper side of the electric wire laying 42 side above 44a.
b is formed. Further, the upper side of the wire laying upper layer 42 of the wiring board 40 is covered with the synthetic resin upper cover 45 of the junction box 4.

According to the fixing structure of the connection terminal 10 of the above embodiment, as shown in FIGS.
The narrow portion 12 at the lower end of the base portion 11 of 0 is soldered to the printed circuit board 30 to stand the connection terminal 10 on the printed circuit board 30, and the bent spring portion 1 on the upper end side of the erected connection terminal 10.
3 and the press contact portion 14 and the locking portion 15 are inserted into the engaging holes 44 of the wiring board 40 in the junction box 4 to lock the locking portions 15 in the recesses 44b of the engaging holes 44.

At this time, as shown in FIG. 3A, the tip of the pressure contact portion 14 of the connection terminal 10 is attached to the tapered surface 44 of the engagement hole 44.
Induction by a, as shown in FIG. 3 (b) and FIG. 3 (c),
When the tip of the press contact portion 14 of the connection terminal 10 passes the intermediate position of the engagement hole 44, the bending spring portion 13 of the connection terminal 10 elastically deforms and becomes substantially linear with the base portion 11. When the upper end side of the connection terminal 10 is further pushed into the engagement hole 44 from this state, as shown in FIG. 1, the bending spring portion 13 and the pressure contact portion 14 of the connection terminal 10 are pushed.
Are opened by the elastic force of the bending spring portion 13 and the locking portion 15 of the connection terminal 10 is securely locked in the recess 44b of the engaging hole 44. As a result, the connection terminal 10 is connected to the printed circuit board 3
0 and the wiring board 40 can be easily fixed. In this fixed state, as shown in FIG. 1, since the press contact portion 14 of the connection terminal 10 vertically projects onto the wiring board 40, the electric wire W
Can be sufficiently secured, and the electric wire W can be easily connected to the press contact blade 14a of the press contact portion 14, and the printed circuit board 30 and the wiring board 40 can be reliably electrically connected. .

Further, the pressure contact blade 14a of the pressure contact portion 14 of the connection terminal 10 is vertically fixed to the wiring board 40 (the engagement portion 15 of the connection terminal 10 engages and secures the recessed portion 44b of the engagement hole 44). Since it was formed only on the upper side), the electric wire W
It is possible to surely perform the pressure contact connection of the electric wire W when the pressure contact portion 14 of the above is pressure connected to the pressure contact blade 14a. As a result, no load force is applied to the printed circuit board 30 side via the connection terminal 10 when the electric wire is pressure-welded, and defects such as cracks do not occur in the soldered portion H between the printed circuit board 30 and the connection terminal 10. Thus, it becomes possible to provide the high quality junction box 4 at a low cost.

[0021]

5 and 6 are sectional views showing a fixing structure of the connection terminal according to another embodiment of the present invention. This connection terminal 20
Is a conductive metal plate-shaped base 21 as shown in FIGS.
A narrow portion 22 is cut out at the lower end (one end) of the.
This narrow portion 22 is a printed circuit board 30 for mounting electronic components.
It is adapted to be inserted into the through hole 31 and fixed to the printed circuit board 30 by soldering (this soldered portion is indicated by a symbol H). In addition, a curved spring portion 23 is provided at an intermediate portion of the base portion 21 of the connection terminal 20, and a pair of locking portions 25 that are inserted and locked into the engaging holes 47 of the lower cover (fixed member) 46 on both upper sides thereof. , 25 are formed by bending. Each locking portion 25 has a taper surface 25a on the upper surface side.
Has a trapezoidal plate shape having respective locking surfaces 25b on the lower surface side, and projects from both edges of the base portion 21 to the side opposite to the curved spring portion 23. Further, at the upper end (other end) side of the base portion 21 of the connection terminal 20, a crimping portion 24 for crimping and connecting the electric wire W of the electric wire wiring sheet (wiring board) 40 'for electric wire wiring in the junction box 4'is bent. Has been formed. The pressure contact portion 24 is formed by bending the upper end side of the base portion 180 by 180 ° and fitting it together, and a U-shaped pressure contact blade for connecting the electric wire W by pressure contact to the center upper portion of the bent pressure contact portion 24. 24a is formed.

As shown in FIGS. 5 and 6, a printed circuit board 30 is provided.
The lower side of is covered by a substrate cover 32 made of synthetic resin. Further, the wire arranging sheet 40 'is the synthetic resin upper cover 4 of the junction box 4'.
5 and a lower cover 46 made of synthetic resin, a rectangular insertion hole 40a through which the pressure contact portion 24 is inserted is formed at a position opposite to the pressure contact portion 24 of the connection terminal 20. A pair of holding pieces 40b, 40b for holding the press-contact portion 24 are integrally formed on both sides of the insertion hole 40a so as to project.
Further, as shown in FIGS. 5 and 8, the engagement hole 47 formed integrally with the lower cover 46 has a substantially rectangular tube shape and projects downward. The pair of locking portions 2 is provided on the inner surface of the engaging hole 47 on the side of the pair of locking portions 25, 25 of the connection terminal 20.
A protrusion 48, with which 5 and 25 are locked, is integrally formed. The protrusion 48 protrudes at a right angle to the inner surface of the engaging hole 47, has a tapered surface 48a on the front surface side, and has the locking surface 4 on which the above-mentioned locking portions 25 are locked.
8b is formed.

According to the fixing structure of the connection terminal 20 of the above embodiment, as shown in FIGS. 5 and 6, the press contact portion 24 on the upper end side of the connection terminal 20 in which the narrow portion 22 is soldered to the printed circuit board 30 is provided. Lower cover 46 of junction box 4 '
Is inserted into the engaging hole 47. At this time, as shown in FIGS. 5 and 8, the connection terminal 20 is pressed against the pressure contact portion 2 via the curved spring portion 23.
4 side is bent and is inserted into the engagement hole 47 of the lower cover 46, and the pair of locking portions 25 of the connection terminal 20 are engaged with the engagement hole 4
It is locked and fixed to the protrusion 48 in 7. That is, FIG.
As shown in FIG. 5, the tapered surface 25 a of each locking portion 25 of the connection terminal 20 is guided by the tapered surface 48 a of the protrusion 48 so that the pressure contact portion 24 side of the connection terminal 20 warps to the opposite side of the protrusion 48 and each of the connection terminals 20. When the tapered surface 25a of the locking portion 25 crosses over the tapered surface 48a of the protrusion 48, the locking surface 25b of each locking portion 25 of the connection terminal 20 abuts the locking surface 48b of the protrusion 48, and As indicated by the solid line, the elastic force of the bending spring portion 23 of the connection terminal 20 reliably locks the locking portions 25 of the connection terminal 20 to the protrusions 48 of the engaging holes 47. Accordingly, the connection terminal 20 is connected to the printed circuit board 30 and the lower cover 46.
Can be easily fixed to and.

In the fixed state, as shown in FIGS. 5 and 6, a pair of holding pieces 40 on the wire laying sheet 40 '.
Since the pressure contact portion 24 of the connection terminal 20 is vertically positioned and protrudes between the terminals b and 40b, a sufficient pressure contact height of the electric wire W can be secured, and the electric wire W is pressed against the pressure contact blade 24a of the pressure contact portion 24.
The printed circuit board 30 and the wire laying sheet 40 'can be reliably electrically connected to each other. As a result, no load force is applied to the printed circuit board 30 side via the connection terminal 20 when the electric wire is pressure-contacted, and no defects such as cracks occur in the soldered portion H between the printed circuit board 30 and the connection terminal 20. It is possible to provide the high quality junction box 4'at low cost.

The pressure contact portion 24 of the connection terminal 20 is the base portion 2.
Since the upper end side of 1 is bent by 180 degrees and the press contact blade 24a is formed in the bent and combined portion, the wire contact area can be increased when connecting the press contact portion 24 of the wire W to the press contact blade 24a. Electric wire W
Can be reliably connected by the press contact portion 24. Further, since the lower cover 46 is provided with the engagement hole 47 for fixing the pressure contact portion 24 side of the connection terminal 20, the wire laying sheet 40 'is provided.
Before assembling the connection terminals 20, the locking portions 25 of the connection terminals 20 can be inserted into the engagement holes 47 of the lower cover 46 to easily fix the connection terminals 20 to the printed circuit board 30 and the lower cover 46. 32, the printed circuit board 30, the lower cover 46, the electric wire wiring sheet 40 ', and the upper cover 45 can be assembled one by one from the bottom. As a result, no extra parts are required in the vicinity of the contact portion between the printed circuit board 30 and the connection terminal 20, so the space between the printed circuit board 30 and the lower cover 46 can be small, and the junction box 4'can be made smaller and thinner. It can be further improved.

According to each of the above-described embodiments, the shape of the wiring board and the lower cover side on which the engaging portion of the connection terminal is engaged is the recess formed in the engaging hole and the protrusion having a trapezoidal cross section. ,
Of course, the shape is not limited to these, and other shapes such as an L-shaped (hook-shaped) locking protrusion may be used.

[0028]

As described above, according to the first aspect of the present invention, the engaging portion at the other end of the connection terminal whose one end is soldered to the printed circuit board is inserted into the engaging hole of the wiring board. By locking, the connection terminal can be easily fixed to the printed board and the wiring board. At this time, since the pressure contact portion of the connection terminal projects on the wiring board, it is possible to secure a sufficient pressure contact height of the wire, and it is possible to easily connect the wire to the pressure contact portion and to connect the printed circuit board and the wiring board. Can be surely electrically connected.

According to the second aspect of the present invention, since the press contact blade of the press contact portion of the connection terminal is formed only on the side fixed vertically to the wiring board, the press contact portion of the electric wire can be attached to the press contact blade. It is possible to securely fix the pressure contact portion during the pressure contact connection, no force is applied to the printed circuit board when the electric wire is pressure contacted, and defects such as cracks may occur in the soldered portion between the printed circuit board and the connection terminal. Absent.

According to the third aspect of the present invention, the engaging portion at the middle of the connection terminal whose one end side is soldered to the printed circuit board,
By inserting and locking in the engaging hole of the fixed member,
The connection terminal can be easily fixed to the printed board and the fixed member. At this time, since the pressure contact portion of the connection terminal projects on the wiring board, it is possible to secure a sufficient pressure contact height of the wire, and it is possible to easily connect the wire to the pressure contact portion and to connect the printed circuit board and the wiring board. Can be surely electrically connected.

According to the fourth aspect of the present invention, by forming a press contact blade in a portion where the press contact portion of the connection terminal is bent by 180 ° and combined with each other, the wire contact area at the time of press contact connection of the press contact portion of the wire to the press contact blade can be reduced. It can be made large, and the electric wire can be reliably connected to the pressure contact portion.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the connection terminal.

FIG. 3A is a sectional view showing a state of the locking portion of the connection terminal just before being inserted into an engagement hole of a wiring board, and FIG. 3B is a state in which the locking portion of the connection terminal is being inserted. FIG. 3C is a sectional view showing a state before the insertion of the locking portion of the connection terminal is completed.

FIG. 4 is a cross-sectional view showing a state in which another form of connection terminal is locked in an engagement hole of a wiring board.

FIG. 5 is a cross-sectional view showing a connection terminal fixing structure according to another embodiment.

FIG. 6 is a cross-sectional view of a fixing structure for a connection terminal according to another embodiment, as viewed from the front side of the connection terminal.

FIG. 7 is a perspective view of a connection terminal according to another embodiment.

FIG. 8 is a cross-sectional view showing a locked state of a locking portion of the connection terminal of the another embodiment.

FIG. 9 is a perspective view showing a connection relationship between a printed circuit board of a conventional example and tab terminals of a wiring board of a junction box.

FIG. 10 is a perspective view before connecting the male terminal and the female terminal, which are used when connecting the printed circuit board of another conventional example and the wiring board of the junction box.

[Explanation of symbols]

10, 20 connection terminals 12,22 Narrow part (one end) 14, 24 Pressure contact part 14a, 24a Pressure contact blade 15,25 locking part 30 printed circuit boards 40,40 'wiring board 44, 47 Engagement holes W electric wire H Solder part

─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-59-73868 (JP, A) JP-A-6-231810 (JP, A) JP-A-9-28019 (JP, A) JP-A-8- 339866 (JP, A) Actual development Sho 54-44993 (JP, U) Japanese Patent Sho 48-13306 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 4/24 H05K 1 / 18 H05K 3/34 504 H01R 13/42 H02G 3/16

Claims (4)

(57) [Claims] 1. A pressure contact portion for fixing one end side of a connection terminal to a printed circuit board for mounting electronic parts by soldering, and at the other end side of the connection terminal for pressure-connecting an electric wire of a wiring board for electric wire wiring. In the fixing structure of the connection terminal, which is formed by fixing both end sides of the connection terminal to the printed circuit board and the wiring board , a bending spring portion is provided on the other end side of the connection terminal.
The distal end side is bent to form the locking portion and the pressure contact portion, respectively, while the wiring board is formed with an engaging hole into which the locking portion of the connection terminal is inserted and locked. A structure for fixing a connection terminal, wherein a press-contact portion of the connection terminal is projected onto the wiring board when the engagement portion of the connection terminal is inserted and locked. 2. The connection terminal fixing structure according to claim 1, wherein a pressure contact portion of the connection terminal is bent and formed perpendicularly to the wiring board, and the wire is attached to the vertically bent pressure contact portion. Forming a U-shaped pressure contact blade for pressure contact connection,
A fixing structure for a connection terminal, wherein the locking portion is formed on a tip side of the press-contact portion. 3. A pressure contact portion for fixing one end side of the connection terminal to a printed circuit board for mounting electronic parts by soldering, and at the other end side of the connection terminal for pressure-connecting an electric wire of a wiring board for electric wire wiring. In the connection terminal fixing structure formed by fixing both end sides of the connection terminal to the printed circuit board and the wiring board, a locking portion is provided at an intermediate portion of the connection terminal, and the locking portion and the
Rutotomoni provided a curved spring portion between the one end, while forming the contact portion at the other end of the connecting terminal, the locking portion of the connection terminal to the fixed member disposed below the wiring board An engaging hole for inserting and locking is formed, and when the locking portion of the connecting terminal is inserted and locked in the engaging hole, the press contact portion of the connecting terminal is projected onto the wiring board. The characteristic fixing structure of the connection terminal. 4. The connection terminal fixing structure according to claim 3, wherein the pressure contact portion of the connection terminal is 180 degrees at the other end side of the connection terminal.
A fixing structure of a connecting terminal, which is formed by bending and bending, and a U-shaped press-contact blade for press-connecting the electric wire is formed at the press-contact part that is bent and matched.