JPS5817337Y2 - Terminal device for printed circuit board - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a terminal device for a printed circuit board used, for example, in a small incandescent lamp dimmer.

Conventionally, in this type of terminal device, a lead wire is soldered to a part of the printed wiring on a printed circuit board, and one end of this lead wire is soldered to a terminal board provided on a frame separate from the printed circuit board. The printed circuit board and frame were then attached together.

However, in a terminal device configured in this way,
In order to efficiently solder the lead wires, the lead wires were made extra long to provide room for tools and fingers to fit between the printed circuit board and the terminal board.

For this reason, it is necessary to provide a housing part in the frame body to accommodate the excess part of the lead wire, which increases the external size of the frame body.
Furthermore, since extra lead wires are used, the cost of each material increases and the device becomes expensive.

Furthermore, since the terminal board and the external electric wires are connected by screws or soldering, there is also the drawback that it takes extra time and effort to install the device.

This invention eliminates the above-mentioned drawbacks by directly fixing one end of the terminal board to the printed circuit board, and forming a sentry lock-type terminal structure with the other end of the terminal board and a chain spring attached to the frame. , by making it possible to connect external electric wires and printed wiring directly with the terminal board, the use of lead wires is eliminated, and the frame body can omit the space for housing the lead wires, making the external size smaller, cheaper, and easier to install the equipment. The present invention aims to provide a printed wiring terminal device that saves time and effort.

An embodiment of this invention will be described below with reference to FIGS. 1 to 4.

In these figures, 1 is the main body of the terminal device made of a thin synthetic resin plate, and a printed circuit board 2 with electrical wires (not shown) printed on an insulating board such as Bakelite with a thickness of 1 to 2 mm is attached to the side. ing.

3 is a rectangular through hole drilled on the electrical wiring on the terminal board mounting edge 2a of the printed circuit board 2 so that the short side is parallel to the terminal board mounting edge 3a; 4 is a rectangular through hole so as to cover the printed circuit board 2; The frame body is attached to the terminal device main body 1 with screws 5, and has an insertion hole 7 through which the electric wire 6 is inserted on the side facing the through hole 3 of the printed circuit board 2, and is connected to the insertion hole 7. one end and the terminal device main body 1
A space portion 8 is formed by one end in contact with the space portion 8.

Reference numeral 9 denotes a locking spring made of elastic metal and shaped like an abbreviated character, which is installed in this space 8. One end 10 of this locking spring protrudes from the end of the insertion hole 7, and is inserted through (the electric wire 6 inserted from L7). It is designed to apply a pressing force to hold the

11 is a terminal plate made of a conductive metal thin plate, and this terminal plate 9
is an inverted-shaped terminal portion 12 whose tip is close to one end 10 of the locking spring 9, and a pair of left and right claw pieces 13b that are connected to this terminal portion 12 and are provided opposite to this claw piece 13b. The distance between the single claw piece 13a is approximately equal to the thickness of the printed circuit board 2, and the single claw piece 13a is connected to the terminal board mounting edge 3a.
A U-shaped clamping part 13 whose length is almost the same as the width B of the through hole 3 plus the length of the long side of the through hole 3, and a single claw piece 13a forming this clamping part 13 has a Along with being connected,
It has approximately the same length as the short side of the through hole 3, and is bent at a right angle so that the distance A to the tip of the other claw piece 13b is larger than the width B of the terminal plate mounting edge 3a. This prevents the locking piece 14 from being locked.

Note that S represents the electrical wiring on the printed circuit board 2 and the terminal board 11.
This is solder that electrically fixes the clamping part 13 and the locking piece 14.

Next, a method of assembling this embodiment will be explained.

If the locking piece 14 of the terminal board 11 is inserted into the through hole 3 of the printed circuit board 2 from the direction of the arrow in FIG.
1 in the direction of the arrow in the figure C.
The locking piece 14 is brought into contact with one end of the short side of the through hole 3 as shown in FIG.

Along with this, the clamping part 13 of the terminal board 11 has a claw piece 13a.
, 13b connects the terminal board mounting edge 2 of the printed circuit board 2.
The locking pieces 14 position the terminal board 11 while holding the terminal board 11 between the terminal boards 11 and 11.

Next, the claw pieces 13b of the clamping portion 13 and the locking pieces 4 are soldered so that they are electrically connected to the electrical wiring of the printed circuit board 2.

After this, the frame 4 with the locking spring 9 installed in the space 8 is
The tip of the terminal portion 12 of the terminal plate 11 is fixed to the main body 1 with a screw 5 so as to be close to one end of the locking spring 9.

In this state, the terminal portion 12 of the terminal board 11 and the locking spring 9 form a self-locking terminal structure, so that the power supply 6 inserted through the insertion hole 7 is connected to the terminal portion 12 of the terminal board 11. It is held securely by the locking spring 9.

Further, electrical connection is also made from the terminal portion 12 via the clamping portion 13 and the locking piece connected to the electrical wiring.

Note that FIG. 5 shows another embodiment different from the above embodiment, in which opposing claw pieces 13 a and 13 b forming the holding portion 13 of the terminal board 11 are formed from both sides of the terminal board 11. Instead, the claw pieces 13 a and 13 b are formed on the same side of the terminal board 11, and one claw piece 1 is formed on the same side of the terminal board 11.
3a is provided with a locking piece 14 similar to that of the above embodiment, and this provides the same effect as that of the above embodiment.

Furthermore, in each of the above-mentioned embodiments, the pair of left and right claw pieces 13b of the clamping portion 13 may be only one piece instead of a pair, and the forming direction of each claw piece 13a, 13b is , even if they are formed in the opposite positions where 133 and 13b are exchanged, the effect will not change in any way.

As explained above, this invention consists of a clamping part that holds the printed circuit board of the terminal device main body, and a locking piece that is connected to one piece of the clamping part and inserted into the through hole of the printed circuit board. A terminal plate made of a conductive metal material with the other end attached to the frame and an attached locking spring forming a sentry lock-type terminal structure is positioned using a locking piece inserted into the through hole. Since it is soldered directly to the printed circuit board at the clamping part, it is possible to make a direct electrical connection to the electrical wiring on the printed circuit board using the terminal board, and it is also possible to connect external electric wires without soldering or screwing. It is not necessary to provide a housing section for housing the lead wires connecting the printed wiring and the terminal board, and the assembly is simple, reliable, and inexpensive.

In addition, in the device of this invention, the locking spring and one end of the terminal board hold the electric wire from the outside, so that the one end of the terminal board is always correctly opposed to the locking spring. The board must be held, and when the wires are inserted, the terminal board is also subjected to force due to the insertion of the wires, so it must be firmly fixed.

To this end, in this invention, a through hole is provided in the printed circuit board, and a printed circuit board holding part and a locking piece for the through hole are provided at the other end of the terminal board, and these holding parts and locking pieces are further soldered. The terminal board is connected and fixed by means of the above-mentioned method, thereby achieving the above-mentioned functions of firmly fixing the terminal board and holding it in the correct position.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the printed circuit board terminal device according to this invention, in which FIG. 1 is a vertical sectional view of the main part, FIG. 2 is an enlarged perspective view of the main part, and FIG. Figures a, l), and c are explanatory diagrams showing the connection method between the printed circuit board and the terminal board;
The figure is a perspective view showing a terminal board, and FIG. 5 is a perspective view of main parts showing another embodiment of this invention. 1 is the terminal device body, 2 is the printed circuit board, 3 is the through hole, 4
1 is a frame body, 6 is an electric wire, 7 is an insertion hole, 8 is a space, 9 is a locking spring, 11 is a terminal plate, 13 is a clamping portion, and 14 is a locking piece. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A terminal device main body that has a printed circuit board with a through hole formed in a part of or near the printed electrical wiring, a frame attached to this main body that has an insertion hole through which an electric wire is inserted, and a space connected to the insertion hole. a lock spring installed in the space and biased in the direction of holding the electric wire, one end of which is locked in the space so as to be close to the tip of the lock spring, and the other end of the lock spring is fixed by soldering or the like to the other end. It is characterized by comprising a U-shaped printed circuit board holding part that is electrically connected to the electrical wiring, and a terminal plate in which one piece of this holding part is bent to form a locking piece that is inserted into the through hole. Terminal device for printed circuit boards.