JPH10284193A - Connection structure between electrical apparatus and printed board, and its connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure between a measuring instrument capable of flattening the entire measuring instrument and a printed board, and to provide its connection method. SOLUTION: A connection member 20 for making the connection between a terminal pin 11 of a measuring instrument and a printed board 30 is provided with a pin connection part 21 being in electrically conductive relationship with the terminal pin 11, a joining arm part 22 which extends outwardly of the pin connection part 21 and which can be deformed by pressure, and a base connection part 23 being in electrically conductive relationship with the printed board 30 provided at the leading end of the joining arm part 22. The printed board 30 is formed with an accommodation hole 31 having a size capable of inserting the pin connection part 21 thereinto, and with an insertion hole 32 into which the base connection part 23 is inserted. The joining arm part 22 is deformed by pressure and the pin connection part 21 is inserted into the accommodation hole 31 so that the height of the connection member 20 on the printed board 30 can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between an electric device having terminal pins as connection terminals and a printed circuit board, and is particularly suitable for use in an instrument for an automobile.

[0002]

2. Description of the Related Art Conventionally, as this kind of connection structure, FIG.
And those shown in FIG. 6 are generally used.
This is to connect an instrument 10 having terminal pins 11 and a printed circuit board 30 with a connecting member 20 in an instrument for an automobile as an electric device.

The connecting member 20 has a pin connecting portion 21 and a board connecting portion 23. The board connecting portion 23 is inserted into the insertion hole 32 of the printed board
Is soldered on the soldering surface X2. on the other hand,
The pin connection part 21 has two leaf springs 21b,
The terminal pin 11 is elastically narrowly attached between the two leaf springs 21b and is detachable. The meter 10 and the printed circuit board 30 are electrically connected through the connecting member 20.

In the connection structure described above, when connecting the meter 10 and the printed circuit board 30, first, the board connection portion 23 of the connection member 20 is inserted into the insertion hole 32, and the pin connection portion 21 is connected to the printed circuit board 30. On the instrument mounting surface X1. Then, the board connecting portion 23 is soldered on the soldering surface X2 opposite to the instrument mounting surface X1. afterwards,
By pressing the terminal pins 11 of the instrument 10 into the pin connection portions 21, the connection between the instrument 10 and the printed circuit board 30 is completed.

[0005]

However, in the above connection structure, the terminal pins 1
1 is arranged, the distance L between the meter 10 and the printed circuit board 30 shown in FIG.
1 and the total height L2 of the instrument 10 becomes large, and there is a problem that the flattening of the entire instrument is hindered.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a connection structure between an electric device and a printed circuit board, which realizes flattening of the entire electric device, and a connection method therefor.

[0007]

As a result of intensive studies, the present inventors have found that a dead space is originally formed on the side of the printed circuit board opposite to the instrument mounting surface because the lead wires of other elements protrude. We paid attention to that. By utilizing this dead space, a housing hole in which the pin connection portion can be inserted is provided in the printed circuit board, and the position of the connection member is lowered to achieve flattening.

That is, according to the first aspect of the present invention, the terminal pin (11) is detached from the connecting member (20) for connecting the terminal pin (11) of the electric device (10) and the printed board (30). Connectable electrical equipment (10)
A pin connecting portion (21) for establishing electrical continuity with the printed circuit board (30); a board connecting portion (23) for establishing electrical continuity with the printed board (30);
A connecting arm (22) that connects between these two connecting portions (21, 23) and is deformable by pressure is provided, and is large enough to allow the pin connecting portion (21) to be inserted into the printed circuit board (30). A storage hole (31) and an insertion hole (32) into which the board connection part (23) is inserted are provided.

Accordingly, when connecting the electric device (10) and the printed board (30), the board connecting part (23) is inserted into the insertion hole with the pin connecting part (21) separated from the printed board (30). After being inserted into (32), the connecting arm (22) is deformed under pressure to insert and fix the pin connecting portion (21) into the storage hole (31), and the terminal pin (11) is connected to the pin connecting portion (21). ).

[0010] Therefore, the pin connection portion (21) is inserted into the storage hole (31) and protrudes into the dead space below the printed board (30), so that the pin connection portion (21) for the printed board (30) is formed. 21) and the position of the terminal pin (11) can be made lower than before, and flattening of the entire electric device (10) can be realized. The fixing means for fixing the pin connection part (21) in the storage hole (31) is such that the locking parts (21c, 21d) are provided on the outer wall of the pin connection part (21). be able to. Thereby, the locking portions (21c, 21d) are locked to the printed circuit board (30), and the pin connection portions (21) are locked.
Is fixed to the storage hole (31).

Here, as shown in claim 3, the locking portion according to claim 2 is provided with a positioning piece (21c) protruding from the outer wall of the pin connecting portion (21) and a positioning piece (21c) protruding from the outer wall of the pin connecting portion (21). The positioning piece (21c) is a protruding elastically deformable spring piece (21d), and the positioning piece (21c) of the printed circuit board (30) faces the electric device (10) facing the electric device (10).
1) to restrict the insertion depth of the pin connection portion (21) into the storage hole (31), and the spring piece (21d) is opposite to the electrical device mounting surface (X1) of the printed circuit board (30). The contact hole (3) of the pin connection portion (21) comes into contact with the side surface (X2).
It is possible to prevent departure from 1). According to the invention of claim 4, the terminal pin (11) is detachably connected to the connection member (20) for connecting the terminal pin (11) of the electric device (10) and the printed board (30). Pin connection part (21) to be printed and printed circuit board (30)
And a connecting arm (22) that connects the two connecting portions (21, 23) and is deformable by pressurization. The printed circuit board (30) includes:
A storage hole (3) large enough to insert the pin connection portion (21)
1) and an insertion hole (3) into which the board connection portion (23) is inserted.
2) a method for connecting an electric device and a printed board, wherein the pin connection part (21) is separated from the printed board (30), and the board connection part (23) is inserted into the insertion hole (3).
2), a step of pressing and deforming the connecting arm portion (22) to insert and fix the pin connecting portion (21) into the storage hole (31), and connecting the terminal pin (11) to the pin connecting portion. Connecting to (21).

According to the present invention, it is possible to provide a connection method for realizing a connection structure between an electric device and a printed circuit board having the function and effect of the first aspect of the present invention.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. In the present embodiment, the connection structure between the electric device and the printed circuit board according to the present invention is applied to a connection structure between an automotive instrument and a printed circuit board. The specific structure is shown in FIGS. 2 to 4, the instrument 10 is omitted.

Reference numeral 10 denotes a meter as an electric device of the present invention, 11 denotes a terminal pin of the meter 10, 20 denotes a connecting member, and 30 denotes a printed circuit board. The terminal pins 11 and the printed circuit board 30 are mechanically connected via the connecting member 20 and are electrically connected. Here, the surface of the printed circuit board 30 facing the instrument 10 is the instrument mounting surface X1, and the surface opposite to the instrument mounting surface X1 is
It is configured as a soldering surface X2 on which soldering described later is performed.

The connecting member 20 is integrally formed of an elastic metal such as phosphor bronze for spring. Connection member 2
Reference numeral 0 denotes a pin connecting portion 21 for establishing electrical continuity with the instrument 10 via the terminal pin 11, a thin connecting arm 22 extending outward from the pin connecting portion 21, and a printed circuit board 30 provided at the tip of the connecting arm 22. Board connection part 2 that establishes electrical continuity with the
3. The connection between the pin connection portion 21 and the board connection portion 23 is provided.

On the other hand, as shown in FIG.
0 is an accommodation hole 31 having a size enough to insert the pin connection portion 21 and an insertion hole 32 into which the board connection portion 23 is inserted.
Are formed. As shown in FIG. 2, the pin connection part 21 has a case 21a that is opened vertically. Two leaf springs 21b are folded toward the inside of the case 21a from opposing positions in the upper opening edge of the case 21a. The terminal pin 11 is removably connected to the pin connecting portion 21 by being elastically tightly fitted between the two leaf springs 21b.

The side wall of the case 21a is provided with a plate-like positioning piece 21c protruding from the side wall and a leaf spring-like spring piece 21d cut and raised from the side wall and protruding and elastically deformable. The positioning piece 21c is provided to protrude from the vicinity of the upper opening edge of the side wall of the case 21a. This positioning piece 21c is, as shown in FIG.
In contact with the edge of the storage hole 31 on the instrument mounting surface X1,
Further, the insertion depth is regulated so that the pin connection portion 21 is not inserted into the storage hole 31.

The spring piece 21d is provided in a portion of the side wall of the case 21a below the positioning piece 21c. The spring piece 21d is elastically deformed by pressurization and returns to the inside of the side wall surface of the case 21a. When not pressurized, the spring piece 21d is cut and raised. Then, as shown in FIG. 4, the spring piece 21d comes into contact with the edge of the storage hole 31 on the soldering surface X2 side to prevent the pin connection portion 21 from being detached from the storage hole 31. I have.

As described above, the positioning piece 21c and the spring piece 21d are formed as locking portions that are locked to the printed circuit board 30 to fix the pin connecting portions 21 to the storage holes 31. As shown in FIGS. 1 and 4, the pin connection portion 21 is inserted into the storage hole 31, and a lower portion of the pin connection portion 21 protrudes from the soldering surface X2. The connecting arm 22 extends downward from the upper opening edge of the case 21a to the outside of the case 21a, and has a plurality of bent portions in the middle. The angle of the bent portion of the connecting arm 22 is changed by pressing the connecting arm 22 beyond the elastic deformation range of the connecting arm 22, and the connecting arm 22 is folded from the state shown in FIG. 3 to the state shown in FIGS.

The board connecting portion 23 is provided with an insertion regulating piece 23a protruding therefrom, and is provided with an insertion hole 32 on the instrument mounting surface X1 side.
Abuts on the edge portion of the insertion hole 3 and the board connection portion 23 is further inserted.
The insertion depth is regulated so as not to be inserted into the second. And
As shown in FIG. 1, the board connection part 23 inserted into the insertion hole 32 is soldered on the soldering surface X2. Here, a conduction portion (not shown) for establishing electrical conduction with the board connection portion 23 is formed at a hole edge portion of the insertion hole 32 on the soldering surface X2, and the conduction portion and the board connection portion 23 are formed. Is electrically conducted by the solder W.

Next, a connection method of the present embodiment based on the above configuration will be described. Connect the board connecting part 23 to the printed board 3
In the step of connecting to 0, first, as shown in FIG. 2, the connecting member 20 is positioned above the instrument mounting surface X1 of the printed circuit board 30. Then, the pin connection part 21 is connected to the printed circuit board 30.
The board connection part 23 is inserted into the insertion hole 32 in a state where the board connection part 23 is separated from the insertion hole 32. Then, as shown in FIG.
Are connected to the printed circuit board 30.

Next, in this state, it is subjected to a soldering step. Soldering is performed by a method called automatic jet soldering. A solder bath in which the solder liquid is stored is prepared, and the solder liquid surface is waved by vibration or the like. Then, the soldering surface X2 of the printed board 30 is brought into contact with the soldering liquid surface, and the soldering liquid is applied to the board connecting portion 23 and the soldering surface X2. This method is excellent in mass productivity.
Here, the pin connection part 21 is located at a height such that the solder liquid does not adhere to the soldering surface X2.

In the step of inserting and fixing the pin connecting portion 21 into the storage hole 31, the connecting member 20 is pressed from the direction shown by the white arrow in FIG. Fold and deform the pin connector 2
1 is inserted into the storage hole 31. Then, the spring piece 21d
Is brought into contact with the peripheral edge of the storage hole 31 and is elastically deformed.
Since the pin connection portion 21 is retracted in the side wall direction of the pin 1a, the pin connection portion 21 is further pushed into the storage hole 31. Spring piece 2
When 1d is located below the soldering surface X2 of the printed circuit board 30, the spring piece 21d is cut and raised again by the spring elasticity, and the storage hole 3 on the soldering surface X2 side.
1 abuts on the edge.

At the same time, the positioning piece 21c contacts the edge of the storage hole 31 on the instrument mounting surface X1 side. Therefore,
As shown in FIG. 4, the edge of the storage hole 31 and the positioning piece 2
The pin connection portion 21 is fixed to the storage hole 31 by locking with the 1c and the spring piece 21d. Subsequently, in the step of connecting the terminal pin 11 to the pin connecting portion 21, the terminal pin 11 is press-fitted between both leaf springs 21 b of the pin connecting portion 21. Thus, the connection between the meter 10 and the printed circuit board 30 is completed, and the state shown in FIG. 1 is obtained.

According to the present embodiment, after soldering, the pin connection portion 21 is inserted into the storage hole 31 and is arranged to protrude into the dead space below the soldering surface X2 of the printed circuit board 30. So terminal pin 11
Can be made lower than before, and flattening of the entire instrument 10 can be realized. Incidentally, the conventional general connection structure shown in FIG. 5 is compared with the present embodiment shown in FIG.
In the present embodiment, the distance L1 (for example, about 3 mm) from the meter 10 and the printed circuit board 30 is set to the conventional (for example, about 6 mm).
The total height L of the instrument 10
2 can be achieved.

Further, the present embodiment is particularly suitable for a flat instrument which is required for high density instrument panels of automobiles and the like. As described above, in the present embodiment, the pin connection portion 21 is different from the conventional connection structure.
It is characterized in that a connecting arm portion 22 that can change the relative distance between the two connecting portions 21 and 23 by deforming itself is provided between the connecting arm portion and the substrate connecting portion 23.

Further, according to the present embodiment, at the time of automatic jet soldering, the pin connection portion 21 is higher than the soldering surface X2 so that the solder liquid does not adhere. The connection of the connection part 23 to the printed circuit board 30 becomes possible. The connecting arm 22
Does not need to be plastically deformed beyond the elastic limit as in the above embodiment. For example, the connecting arm portion 22 may be elastically deformed by using an elastic member such as a spring material selected so that the return elasticity after the deformation is not too strong.
Thereby, the same effect as the above embodiment can be obtained.

The printed circuit board 30 and the board connecting portion 23
The conducting portion that establishes electrical continuity with the instrument may not be formed on the soldering surface X2 but may be formed on the instrument mounting surface X1. Then, the electrical connection may be established by contacting the insertion restricting piece 23a of the board connecting portion 23. The connection between the printed board 30 and the board connecting portion 23 may not be performed by soldering, and may be connected by bonding, locking, press-fitting, fitting, or the like.
Of course, a conduction portion is provided on the printed circuit board 30 so that the third portion is electrically conducted.

[Brief description of the drawings]

FIG. 1 is a side view showing an assembled state of a connection structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the embodiment before being assembled.

FIG. 3 is a perspective view showing a state in which a board connecting portion is inserted into a printed board in the embodiment.

FIG. 4 is a perspective view showing a state where a pin connection portion is inserted into a printed circuit board in the embodiment.

FIG. 5 is a side view showing an assembled state of a conventional general connection structure.

FIG. 6 is an exploded perspective view of a conventional general connection structure before assembly.

[Explanation of symbols]

10: instrument, 11: terminal pin, 20: connecting member,
Reference numeral 21: pin connection portion, 21c: positioning piece, 21d: spring piece, 22: connecting arm portion, 23: board connection portion, 30: printed circuit board, 31: storage hole, 32: insertion hole, X1: instrument mounting surface X2: Soldering surface.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // G01R 5/16 G01R 5/16 A

Claims (4)

[Claims] 1. A terminal pin (1) of an electric device (10).
1) a connection member (20) for mechanically connecting and electrically connecting the printed board (30) to the printed circuit board (30); and a connection member (20) provided on the connection member (20), wherein the terminal pin (11) is detachably connected. The said electric equipment (10)
A pin connecting portion (21) for establishing electrical continuity with the connecting arm (22), a connecting arm (22) extending outward from the pin connecting portion (21) and deformable by applying pressure, and a tip of the connecting arm (22). And a board connecting portion (2) for providing electrical continuity with the printed board (30).
3), a storage hole (31) provided on the printed board (30) and having a size capable of inserting the pin connection part (21); and a storage hole (31) provided on the printed board (30). An insertion hole (32) into which the pin connection part (21) is inserted, and the board connection part (23) is inserted into the insertion hole (32) with the pin connection part (21) separated from the printed circuit board (30). Then, the connecting arm portion (22) is deformed under pressure to insert the pin connection portion (21) into the storage hole (3).
A connection structure between an electric device and a printed circuit board, wherein the terminal device is inserted into and fixed to 1), and the terminal pin (11) is connected to the pin connection portion (21). 2. An engaging portion (21c, 21d) is provided on an outer wall of the pin connecting portion (21).
2. The electric device and the printed circuit board according to claim 1, wherein the c, 21 d) is locked to the printed circuit board (30) to fix the pin connection portion (21) in the storage hole (31). And connection structure. 3. The pin connection part (21), wherein the locking part is a pin connection part (21).
And a spring piece (21d) projecting from the outer wall of the pin connection portion (21) and elastically deformable. The positioning piece (21c) is formed of the printed board (3).
0) abutting on the electrical equipment mounting surface (X1) facing the electrical equipment (10) to regulate the insertion depth of the pin connection part (21) into the storage hole (31); (21d) is a surface (X2) of the printed circuit board (30) opposite to the electric device mounting surface (X1).
And the storage hole (3) of the pin connection portion (21).
The connection structure between an electric device and a printed circuit board according to claim 2, wherein the connection structure is prevented from coming off from 1). 4. A terminal pin (1) of an electric device (10).
1) a connection member (20) for mechanically connecting and electrically connecting the printed board (30) to the printed circuit board (30); and a connection member (20) provided on the connection member (20), wherein the terminal pin (11) is detachably connected. The said electric equipment (10)
A pin connecting portion (21) for establishing electrical continuity with the connecting arm (22), a connecting arm (22) extending outward from the pin connecting portion (21) and deformable by applying pressure, and a tip of the connecting arm (22). And a board connecting portion (2) for providing electrical continuity with the printed board (30).
3), a storage hole (31) provided on the printed board (30) and having a size capable of inserting the pin connection part (21); and a storage hole (31) provided on the printed board (30). 23) A method for connecting an electric device having an insertion hole (32) into which a pin 23 is inserted and a printed circuit board, wherein the pin connection part (21) is separated from the printed circuit board (30). A step of inserting a connection part (23) into the insertion hole (32); and a step of inserting and fixing the pin connection part (21) into the storage hole (31) by pressing and deforming the connecting arm part (22). And connecting the terminal pin (11) to the pin connection part (21).
And a method of connecting an electric device to a printed circuit board.