JPH067573Y2 - Device for fixing plate terminals to circuit board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a device for fixing plate-like terminals to a circuit board, and particularly when press-fitting the plate-like terminals into the circuit board for solder dipping. The present invention relates to a fixing device for a plate-like terminal to a circuit board, which prevents the plate-like terminal from loosening or coming off.

[Prior Art] Conventionally, a fixing device of this kind of plate-like terminal to a circuit board will be described with reference to FIGS. In the figure, (1) is a plate-like terminal, and a press-fitting portion (2) is formed slightly below the upper end of the terminal by laterally protruding both side edges. The width of both side edges of the press-fitting portion (2) is formed to be slightly larger than the width or diameter of the terminal insertion hole (4) provided in the circuit board (3) on the left and right sides, and the plate-shaped terminal (1 ) Is the terminal insertion hole (4) of the press-fitting part (2)
It is configured so that it can be temporarily fixed to the circuit board (3) by press fitting into. Furthermore, at the lower part of the press-fitting part (2), both side edges are provided to project laterally, and a locking part (5) is formed.
The left and right widths of the locking portion (5) are formed larger than the width of the press-fitting portion, and when the plate-like terminal (1) is press-fitted into the terminal insertion hole (4), the locking portion (5) The press-fitting portion (2) of the plate-like terminal (1) is formed so as to be securely press-fitted into the terminal insertion hole (4) by being locked to the lower end surface of the terminal insertion hole (4).

Thus, when fixing the plate-like terminal (1) to the circuit board (3), the press-fitting portion (2) of the plate-like terminal (1) is inserted into the terminal insertion hole (4) of the circuit board (3). ) From the back surface of the circuit board (3). In that case, the press-fitting portion (2) of the plate-shaped terminal (1) is crimped to the left and right inner wall surfaces of the terminal insertion hole (4) to temporarily fix the plate-shaped terminal (1). After this, the plate-like terminals (1) are soldered (S) on the back surface of the circuit board (3) by dip processing or the like to attach the plate-like terminals (1) to the circuit board.
Fix to (3).

[Problems to be Solved by the Invention] The conventional device for fixing a plate-like terminal to a circuit board is
Press-fitting parts (2) protruding from the left and right end edges of the plate-like terminal (1) are crimped to the left and right inner side surfaces of the terminal insertion hole (4) provided in the circuit board (3), and the plate-like terminal (1 ) Was temporarily fixed to this circuit board (3). At this time, a gap (G) is generated between the front and rear surfaces of the plate-shaped terminal (1) and the front and rear inner wall surfaces of the terminal insertion hole (4), and as described above, the plate-shaped terminal ( 1) is temporarily fixed by two-point support on both left and right edges of the press-fitting part (2). Therefore,
After temporarily fixing the plate-like terminal (1) in the terminal insertion hole (4), when the plate-like terminal (1) is soldered (S) into the terminal insertion hole (4), shock or heat is applied. As a result, the plate-like terminal (1) swings in the front-back direction around the press-fitting portion (2) as a fulcrum, causing play.
Alternatively, there is a defect that the workability of the soldering operation of the plate-like terminal (1) is remarkably deteriorated by falling off.

Therefore, when fixing the plate-like terminal to the circuit board with solder dip, there arises a technical problem to be solved in order to improve the workability and the product performance. The purpose is to solve these problems.

[Means for Solving the Problems] The present invention has been proposed in order to achieve the above-mentioned object, and a plurality of plate-shaped terminal insertion holes are provided in a circuit board,
The plate-shaped terminal has press-fitting portions formed by protruding both side edges to the side so that the press-fitting portions can be pressed against the longitudinal side wall of the insertion hole, and the press-fitting portion is provided in the circuit board in the longitudinal direction of the insertion hole. In a circuit board in which the plate-like terminal can be temporarily fixed to the insertion hole by being pressed against the side wall, a protrusion is provided in the front-rear direction at a substantially intermediate portion of the press-fitting portion of the plate-like terminal, and The press-fitting portion is pressed against the longitudinal side wall of the insertion hole, the projection is pressed against the longitudinal side wall of the insertion hole, and is formed to be lower than the longitudinal length of the insertion hole at the lower part of the press-fitting portion. Is provided, and is engaged with the hole surface of the insertion hole,
Further, the tip end of the plate-like terminal formed in a narrow width is bent along the inner side surface of the circuit board, and the circuit board is sandwiched between the engaging portion and the bent portion, and the press-fitting portion and the protrusion are formed. The present invention provides a fixing device for a plate-like terminal to a circuit board, which is characterized in that the plate-like terminal is temporarily fixed to the circuit board and soldered together with the pressure contact.

[Operation] When the plate-shaped terminal is press-fitted into the insertion hole of the plate-shaped terminal opened in the circuit board, the press-fitting portion provided in the plate-shaped terminal presses the side wall in the longitudinal direction of the insertion hole. Inserted in. Since a protrusion is provided in the front-rear direction at a substantially middle portion of the press-fitting portion provided on the plate-shaped terminal, the press-fitting portion is pressed against the longitudinal side wall of the insertion hole and at the same time the protrusion is inserted. It also press-contacts the side wall of the hole in the front-back direction. Further, a locking portion larger than the length of the insertion hole in the longitudinal direction is formed in the lower portion of the press-fitting portion, but the press-fitting portion and the protrusion are provided on the left and right side walls and the front and rear side walls of the insertion hole. During press contact, the locking portion locks on the hole surface of the insertion hole, and the tip end of the narrow width protruding above the press-fitting portion is bent along the inner side surface of the circuit board. Then, the circuit board is sandwiched between the bent portion and the locking portion. Thus, when the plate-shaped terminal is inserted into the insertion hole provided in the circuit board, the plate-shaped terminal press-contacts the circuit board from the vertical and horizontal directions to temporarily fix the plate-shaped terminal to the circuit board.
Therefore, the plate-shaped terminal is properly supported in the insertion hole, and is heated by the solder heat at the time of dipping the solder, and falls off,
Alternatively, it does not swing, and during the soldering work, the plate-like terminal maintains the correct posture, and accurate soldering is performed.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to FIGS. 1 to 6 of the attached drawings. For convenience of description, technical matters that are conventionally known will be described at the same time. In the figure, (10) is a circuit module, and as shown in FIGS. 1 and 2, a chassis (11) is internally provided with a circuit board (12), and the circuit board (12) is
Circuit pattern (not shown) and various electronic parts (W) (W) ...
Etc. are provided. And the plate-shaped terminal of this electronic circuit
(13) Terminal insertion holes (14) in which the circuit board (12) is provided with (13) ...
(14) ... Soldered by dipping after press-fitting
(S) and fixed.

As shown in FIGS. 3 and 4, the plate-like terminals (13) (13) ... are provided with laterally opposite left and right edges slightly below the upper end (13a) thereof. The press-fitting part (15) is formed. The lateral width of the press-fitting portion (15) is formed to be slightly larger than the lateral width of the terminal insertion hole (14).
The plate surface of 5) is formed by projecting in the thickness direction by pressing etc.
(15a) is formed. When the plate-shaped terminal (13) is press-fitted into the terminal insertion hole (14) of the circuit board (12), the protrusion (15a) is configured to press-fit the inner wall of the front surface of the terminal insertion hole (14). Has been formed. In addition, at the lower part of the press-fitting part (15), a locking part (1
6) is provided, and the locking portion (16) is formed to have a slightly larger length in the width direction than the press-fitting portion (15). Therefore, when the plate-shaped terminal (13) is press-fitted into the terminal insertion hole (14), the press-fitting portion (15) can be accurately press-fitted into the terminal insertion hole (14).

Thus, when fixing the plate-like terminal (13) to the circuit board (12), the press-fitting portion (15) of the plate-like terminal (13) into the terminal insertion hole (14) of the circuit board (12). It is press-fitted, but at this time, both side edges of the press-fitting part (15) provided on the plate-like terminal (13) and the projection (15a).
Presses against the inner wall surface of the terminal insertion hole (14) of the circuit board (12). Therefore, the plate-like terminal (13) is firmly supported in the terminal insertion hole (14) and its rotation is suppressed. Thus, the plate-like terminal (13) can be reliably temporarily fixed to the circuit board (12) in a correct posture, and soldering (S) by solder dip processing can be accurately performed.

On the other hand, as shown in FIG. 5, the plate terminals (13), (13) ... Are formed by punching a single plate conductor (D).
Moreover, the respective tip portions are formed in a connected state. Therefore, the plate-like terminals (13) (13) are simultaneously press-fitted and fixed in the terminal insertion holes (14) (14) of the circuit board (12). afterwards,
Each of the plate-shaped terminals (13) (13) ... has a tip portion (C in the figure) of the connecting portion.
The wire is cut to form independent plate terminals (13) (13). Further, as shown in FIGS. 5 and 6, the plate-like terminal (13) has a narrow and sharp tip so that it can be easily attached to a board of an electric device body (not shown). Is configured as follows. Further, after the plate-like terminal (13) is press-fitted into the circuit board (12), the upper end portion (13a) thereof is bent backward so that the press-fitted portion is formed.
Together with (15), the plate-like terminal (13) is securely and firmly fixed to the circuit board (12).

It should be noted that the present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modified version.

[Advantages of the Invention] As described in detail in the above-described one embodiment, this invention has a protrusion projecting in the thickness direction by press working or the like at the press-fitting portion of the plate-like terminal fixed to the circuit board. Therefore, when the plate-shaped terminal is press-fitted into the terminal insertion hole and temporarily fixed, both side edges of the press-fitted portion of the plate-shaped terminal and the protrusion are provided on both side wall surfaces in the longitudinal direction of the terminal insertion hole and in the front-back direction. It is elastically attached to the wall surface, and further, the locking portion provided directly below the press-fitting portion is locked to the hole surface of the insertion hole, and the narrow tip end of the plate-like terminal extends along the inner surface of the circuit board. The circuit board is sandwiched between the bent portion and the locking portion from above and below. Thus, when the plate-shaped terminal is inserted into the insertion hole provided in the circuit board, the plate-shaped terminal press-contacts the circuit board from the vertical and horizontal directions to temporarily fix the plate-shaped terminal to the circuit board.

Therefore, the plate-shaped terminal can be reliably fixed to the circuit board in a correct posture by solder dipping or the like, which contributes to improvement in workability of fixing and product accuracy.

[Brief description of drawings]

The figure shows an embodiment of the present invention. 1 is a partially cutaway plan view of a circuit module, FIG. 2 is a front view of the same, FIG. 3 is a plan view of a plate terminal fixed to a terminal insertion hole of a circuit board, and FIG. 4 is a front view of the same. FIG. 5 is a partially cutaway front view of a plurality of plate-like terminals formed by punching a single plate conductor, and FIG. 6 is a top view of the plate-like terminals bent after press-fitting the plate-like terminals into a circuit board. Partially cutaway side view showing the state, FIGS. 7 to 9 show a conventional type, and FIGS. 7 and 8 are partially cutaway plan views when the plate terminals are fixed to the circuit board, and FIG. Is a front view of the same. (12) …… Circuit board, (13) …… Plate-like terminal (14) …… Terminal insertion hole, (15) …… Press-fitting part (15a) …… Projection

Claims (1)

[Scope of utility model registration request] 1. A circuit board is provided with insertion holes for a plurality of plate-like terminals, and the plate-like terminals have both side edges protruding laterally so that they can be pressed against a longitudinal side wall of the insertion holes. In the circuit board in which the press-fitting portion is pressed against the longitudinal side wall of the insertion hole provided in the circuit board so that the plate-shaped terminal can be temporarily fixed in the insertion hole, A protrusion is provided in the front-rear direction at a substantially middle portion of the press-fitting portion, and the press-fitting portion is pressed against a longitudinal side wall of the insertion hole, and the protrusion is pressed against a front-rear direction side wall of the insertion hole, Further, a locking portion formed to be larger than the length of the insertion hole in the longitudinal direction is provided in the lower portion of the press-fitting portion, is locked to the hole surface of the insertion hole, and is further formed in a narrow width. Bend the tip portion of the terminal along the inner side surface of the circuit board, and sandwich the circuit board between the locking portion and the bent portion, Serial press-fit portion and projection of the fixing device of the plate-like terminals I pressure coupled with and temporarily fixed to the circuit board to the circuit board plate terminals, characterized by soldering.