JPH0342626Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a terminal structure for connecting external lead wires that is attached to a printed circuit board.

B. Outline of the invention The terminal structure of the invention is designed to connect the terminal block surface to the circuit board so that the terminal screw for securing the lead wires advances and retreats parallel to the circuit board so that external lead wires can be connected from either the front side or the back side of the circuit board. When the terminal block is attached to the circuit board perpendicular to the board, the terminal block is attached to the surface of the circuit board so that no part of the terminal block protrudes from the edge of the circuit board.
The circuit board is provided with a half-cut cutout line for forming a notch so that the external lead insertion surface of the terminal block can be seen from the back surface of the circuit board.

C. Prior Art Conventionally, a terminal structure as shown in FIG. 6 has been provided as a terminal structure that allows connection of external lead wires from either the front or back side of a circuit board. In this case, a terminal block 2 is attached along the side edge of a circuit board 1 as shown in the figure. In order to be able to connect the lead wires to the terminals from either the front or back of the circuit board,
In this way, the terminal block must have a structure in which the lead insertion surface is flush with or protrudes from the edge of the circuit board, so it can be done in the same process as attaching and soldering other circuit elements to the circuit board. If the terminal block is attached to the circuit board and soldered, solder flux will adhere to the lead insertion surface of the terminal block, which requires a separate process for attaching and soldering the terminal block, which causes high costs. was. In addition, when such a mounted printed circuit board is transported, the heads of terminal screws and the partition plate 3 between the terminals protruding from the terminal block protrude from the edge of the circuit board, making it a bulky item for transportation, and causing damage to other people. The terminal block was sometimes damaged by hitting objects, especially the inside of the packaging box.

D. Problems to be solved by the invention The present invention has been made by focusing on the problems of the conventional example, and has a terminal structure that allows lead wires to be connected from either the front or back of the circuit board without increasing costs. Another object of the present invention is to provide a terminal unit that does not get dirty during soldering, does not become bulky, and does not cause damage to the protruding portion of the terminal unit during transportation.

C. Means for Solving the Problems In the present invention, as illustrated in FIGS. 1 to 4, the terminal block 2 is attached to the surface of the circuit board 1 so as not to protrude from the edge of the circuit board 1, This problem can be solved by providing a cut line 8 in the circuit board 1, which is a half-cut line, for providing a notch in the circuit board so that the lead wire insertion surface 9 of the terminal block can be seen from the back of the circuit board. did.

D. Effect According to the structure described above, as shown in FIG. You can see it from either the front or the back of the
The lead wire 10 can be connected to the terminal block from either the front or back of the board. Before breaking off part 1C, the terminal block is not visible at all from the back side of the board, and even if terminal block 2 is soldered to circuit board 1 at the same time as other circuit elements 1d are mounted, flux will not penetrate the leads of the terminal block. It does not go around to the insertion surface, and with this configuration, there is no part protruding from the edge of the circuit board, so it is not bulky during transportation, and the impact from foreign objects is received by the side edge 1a of the board, preventing damage to the terminal block. is also prevented.

E. Example An example of the present invention will be described in detail with reference to FIGS. 1 to 5. In FIG. 1, 1 is a printed circuit board on which a circuit element 1d is mounted, and 2 is a terminal block for external lead wires. As shown in FIG. 2, the surface 9 of the terminal block 2 on which the terminal screws 5 are screwed is the lead wire insertion surface, and a partition plate 3 is formed between both ends of the terminal block and each terminal screw 5. , the terminal block 2 is attached to the circuit board 1 so that the lead wire insertion surface 9 is perpendicular to the surface of the circuit board 1. A conductive pin 6 is inserted for each terminal on the surface opposite to the lead insertion surface 9 of the terminal block 2, and by inserting this conductive pin into the hole 7 of the circuit board 1 as shown in FIG. It is attached to the circuit board 1. During this installation, the lead wire insertion surface 9 of the terminal block is oriented toward the side edge 1a of the circuit board 1, as shown in FIG.
The tip of the partition plate 3 of the terminal block 2 is attached to the surface of the circuit board 1 near the side edge 1a so as not to protrude beyond the side edge 1a. Reference numeral 8 denotes a half-cut cut line for cutting out, which is made up of a row of fine holes formed in the circuit board 1 in a stitch-like manner. This may be replaced by a V-shaped groove. The cut line 8 passes through a line L that runs under the terminal block 2 that is aligned with the lead wire insertion surface 9 of the terminal block or is further inward than that, and passes beside the terminal block, and connects the line L to the side edge 1a of the circuit board. It is provided so as to surround the front part of the terminal block along the line leading to the terminal block. (See FIG. 3) In the terminal structure described above, external lead wires are connected as shown in FIG. 5. In this diagram 1
0 and 10 are external leads whose tips are placed against the terminal insertion surface of the terminal block 2 and tightened with terminal screws 5. If the leads are connected only from the front side of the circuit board, there is no need to cut out the 1C portion from the circuit board. If it is necessary to connect leads from the back side of the substrate 1, the portion 1C may be broken off along the cut line 8.

Effects of the invention The present invention has the above-mentioned advantages.When attaching the terminal block to the circuit board, it can be soldered at the same time as other circuit elements, so it is advantageous in terms of cost. This has the advantage that the connection part of the terminal will not get dirty and the end of the terminal block will not be damaged during transportation, and that by folding a part of the circuit board from the cut line 8, you can freely connect external lead wires from the front and back of the board. have

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of the present invention, Fig. 2 is an enlarged plan view of the main parts of the above, Fig. 3 is a plan view of the circuit board portion of the above except for the terminal block, and Fig. 4 is the same as the above. FIG. 5 is a side view of the main part, FIG. 5 is a perspective view of the main part with an external lead wire connected thereto, and FIG. 6 is a plan view of a conventional example.

Claims (1)

[Scope of utility model registration request] A cut line is formed in a half-cut state so that the circuit board can be arbitrarily broken off to form a notch, and a part of the circuit board is cut out along this cut line, and an external lead wire is inserted into the cutout. Attach the terminal block to the circuit board so that the external lead insertion surface is perpendicular to the circuit board surface, and no part of the terminal block protrudes beyond the original edge of the circuit board. Terminal structure for external lead connection of circuit board attached to.