JPH0517819Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a terminal structure for a small indicator light that is attached to a panel or the like.

(Prior art) Since small indicator lights to be mounted on panels etc. are relatively long and narrow, an insulating base is attached to one end of the cylindrical case, and rod-shaped terminals are passed through the square holes arranged in the insulating base. A series circuit such as a diode, a current limiting resistor, and a light emitting diode is connected to the end of this terminal inside the case, and the light generated by the light emitting diode can be visually observed through a globe provided on the other end of the case. . As shown in FIGS. 4 and 5, this rod-shaped terminal is formed by crushing the middle four sides 1a of a rod-shaped terminal 1 whose cross section is square so as to fit into a square hole provided in the base, and forming a protrusion 1b. , and when the terminal 1 is inserted into the square hole, the protrusion 1b comes into contact with the opening periphery of the square hole.

(The problem that the invention aims to solve) However, if each side of the rod-shaped terminal is crushed in this way, the cross-sectional area will decrease and cracks will occur.
The strength of this portion is weakened, and when bending stress is applied to the outer end of the terminal 1, the terminal may bend or break. Also, since both terminals have the same shape and are symmetrical with respect to the base, there was a drawback that when connecting a diode, etc., the polarity had to be indicated separately.

The purpose of the present invention is to provide a terminal structure for a small indicator lamp that is durable without being bent or broken, and that can distinguish between extreme conditions.

(Means for Solving the Problem) This invention provides a terminal structure for a small indicator light in which rod-shaped terminals each having a square cross section pass through two square holes arranged side by side in an insulating base of a case. is twisted at a predetermined angle in the circumferential direction of each axis at the same position in the length direction to form a raised part around the rod, and one of the square holes is large enough to fit the raised part of the rod-shaped terminal. A stepped portion having an opening of It is characterized in that both rod-shaped terminals are attached to the insulating base so that they are brought into contact with the other square hole and have different lengths of outward protrusion.

(Function) Both rod-shaped terminals of this invention are twisted at a predetermined angle in the axial and circumferential direction at the same position in the length direction to form a protuberance around the rod, so that the cross-sectional area of the rod-shaped terminal can be reduced. In addition, by forming a step in one of the square holes of the insulating base and inserting the raised part of one of the rod-shaped terminals into the step, the terminal protrudes outward from the insulating base. Both rod-shaped terminals can have different lengths.

(Example) An example of the present invention will be described in detail based on FIGS. 1 to 3. In FIG. 1, an insulating base 3 is attached to one end surface of a cylindrical case 2, and a rod-shaped terminal 1 with a square cross section is inserted through two square holes 3a and 3b provided side by side in the base 3. The books run parallel to each other. One square hole 3a of this base 3 is simply a cross section into which the rod-shaped terminal 1 is fitted. However, the cross section of the outer opening of the other square hole 3b is enlarged, and a stepped portion 3c is formed in the middle in the length direction. Further, as shown in FIGS. 2 and 3, the rod-shaped terminal 1 is twisted 90 degrees in the circumferential direction of the axis at the middle in the longitudinal direction. Therefore, the strength of the twisted portion does not weaken, and a portion thereof forms a raised portion 1c around the rod. Therefore, this rod-shaped terminal 1 is inserted into both square holes 3a and 3b of the base 3 from the outside, and this raised portion 1
When c is brought into contact with the base 3, the raised part 1c of one terminal 1 will come into contact with the opening periphery of the square hole 3a, but the raised part 1c of the other terminal 1 will come into contact with the stepped part 3c of the square hole 3b. come into contact with Therefore, the outwardly protruding lengths of the two rod-shaped terminals 1, 1 differ by L as shown in FIG. 1, which is convenient for determining the difference in polarity between the two terminals 1, 1. In order to assemble the indicator light shown in Fig. 1, before attaching the base 3 to the case 2, first insert the terminals 1, 1 into the square holes 3a, 3b of the base 3, respectively. An indicator light circuit including a current limiting resistor 4, a light emitting diode 5, and a diode 6 connected in series is connected to the tip. At this time, the lead wires of the resistor 4 and the diode 6 are thickly soldered to the terminal 1 to prevent the terminal 1 from coming off. 7 is an insulating tube placed over the diode 6. When the base having the terminal 1 connected to this indicator light circuit is inserted into the case 2 from one end surface, the protrusion 3d provided on the side of the base 3 engages with the engagement hole 2 of the case 2. Case 2 and base 3 are combined. The other end face of the case 2 is covered with a globe 8 and the issuing diode 5
You can visually see the light emitted from the A screw thread 2b is provided on the outer periphery of the case 2, and this indicator light is inserted into a hole in the panel in the same way as the conventional one, and then the panel is sandwiched between the nut 9 and the step 2c of the case 2. Install it as shown.

When an AC voltage is applied to both terminals 1, 1, the current rectified by the diode 6 flows to the issuing diode 5 while being limited by the resistor 4, and serves as an indicator light. When applying voltage, it is determined in advance based on the lengths of both terminals 1, 1 so that a positive voltage is applied to terminal 1 on the anode side of diode 6.

In the past, the rod-shaped terminals had the same shape and were symmetrical with respect to the base, so when connecting a diode, the polarity had to be indicated separately, but according to this embodiment, the length and shape of the rod-shaped terminal 1 can be indicated separately. A stepped portion 3c is formed in the square hole 3b of the base 3, and a raised portion 1c of one rod-shaped terminal 1 is formed in the same direction as the stepped portion 3c.
Since the two rod-shaped terminals 1, 1 are configured so as to come into contact with each other, the lengths of the two rod-shaped terminals 1, 1 projecting outward are different, and thereby the polarity can be distinguished.

(Effects of the invention) As described above, according to the invention, the rod-shaped terminal is twisted at a predetermined angle at its middle part to form a protrusion for positioning without changing the cross-sectional area. can be prevented. In addition, even if a step is formed in one of the square holes on the base side and a terminal of the same shape is inserted into each square hole, the protruding length of both terminals will be different, so there will be a difference in the length between the two terminals. The polarity can be displayed, which has the effect of preventing incorrect wiring and connections.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the terminal structure of a small indicator light according to the present invention, Fig. 2 is a front view of a rod-shaped terminal used in the indicator lamp of Fig. 1, and Fig. 3 is a
- An enlarged sectional view taken along the X-line, FIG. 4 is a front view showing a conventional example of a rod-shaped terminal, and FIG. 5 is an enlarged sectional view taken along the YY line in FIG. 4. 1... Rod-shaped terminal, 1c... Protrusion of rod-shaped terminal,
2...Case, 3...Insulation base, 3a, 3b...
...Square hole in insulation base, 3c...Stepped part.

Claims (1)

[Scope of utility model registration request] In the terminal structure of a small indicator light, in which rod-shaped terminals each having a square cross section pass through two square holes arranged side by side in the insulating base of the case, both rod-shaped terminals are located at the same position in the length direction, and their axes are aligned with each other. is twisted in the circumferential direction at a predetermined angle to form a raised part around the rod, one of the square holes is formed with a stepped part having an opening large enough to fit the raised part of the rod-shaped terminal, and The rod-shaped terminal is assembled by inserting the raised part of one of the rod-shaped terminals into the stepped part and making it contact with one of the square holes, and by bringing the raised part of the other rod-shaped terminal into contact with the other square hole, so that both of the rod-like terminals are connected. A terminal structure for a small indicator light, characterized in that it is attached to an insulating base so that the lengths of outward protrusion are different.