JPH0743990B2 - Electromagnetic relay with operation display device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic relay including an operation display device.

[Conventional technology]

As a different example of the conventional operation display device for an electromagnetic relay, FIG. 5 shows the arrangement of components, FIG. 6 shows the circuit configuration, and FIG. 7 shows only the circuit configuration. It has been known. 5 and 6 are for a high voltage display circuit in which a neon tube 2 and a resistor 3 connected in series are connected in parallel to an exciting coil 1 of an electromagnetic relay, and the one shown in FIG. 7 is the reverse. This is for a low voltage display circuit in which a resistor 3 is connected in series to a protection diode 4 and a light emitting diode 5 which are connected in parallel, and which is connected in parallel to an exciting coil 1.

[Problems to be Solved by the Invention]

However, in any conventional example, the exciting coil 1
Due to the configuration in which the neon tube 2 or the light emitting diode 5 is turned on even if a failure such as a break of the exciting coil 1 occurs in rare cases, the neon tube 2 or the light emitting diode 5 is turned on, which is erroneously recognized as an operating state. There was a risk of Further, the low voltage display circuit shown in FIG. 7 cannot be used for the high voltage display circuit due to the characteristics of the light emitting diode 5. Therefore, the circuit system for the high voltage display circuit is different, that is, neon. Since it is necessary to provide a display device using the tube 2, the inconvenience and cost of inventory management increase, which is one obstacle to cost reduction. Since the neon tube 2 also has a large external dimension and a short lighting life, it is irrational to replace the relay body due to lighting failure of the neon tube 2 before the life of the relay body, or it becomes individual as shown in FIG. The neon tube 2, the resistor 3 and the protective diode 4 in Fig. 7 are all connected as shown in Fig. 5 by soldering the lead wire cut to the length required for assembly. The points must be soldered. Further, the homing of the connecting wire 8 is required to install the holder 7 in the holder 7, and the number of working steps increases, and the holder 7 becomes large because the neon tube 2 and the like are relatively large. A space is required on both sides of the return spring 10 whose one end is locked to the cut-and-raised piece of the yoke 9, and the holder 7 must be attached before the return spring 10 is locked. There is a drawback that the above-mentioned detailed manual work overlaps with each other and the cost becomes an obstacle to cost reduction and becomes expensive because the process control such as having to distinguish the presence or absence of the display device into the assembly line and inserting it into the assembly line is complicated. It is also known that the holder 7 is relatively small so that the holder can be attached to one side of the yoke 9 around the return spring 10. In this case, the holder is attached to the yoke. Since it is carried out only by press-fitting into the yoke, the mounting state becomes unstable and the reliability is lacking.

Therefore, an object of the present invention is to eliminate the drawbacks of the conventional example described above, to enable independent assembly of the display unit assembly, to share the members, and to mount the display unit assembly after the relay body is assembled. This makes it possible to simplify the work process, and to improve the reliability of the operation by stabilizing the mounting state of the display assembly, and to provide an inexpensive electromagnetic relay with an operation display device.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides an electromagnet fixed on an insulating base, and a contact portion set that opens and closes according to the operation of a movable iron core that is attracted and released by energizing or de-energizing an exciting coil of the electromagnet. In an electromagnetic relay having a body, at least a light emitting diode is mounted, and a display portion including a lead frame having a lead portion for connecting the light emitting diode in series to an exciting coil of an electromagnet and a synthetic resin molded holder fixed to the lead frame. An assembly is provided, and the holder of this display assembly has a locking arm attached to the yoke of the electromagnet, and the claw at the tip of this locking arm is locked to one end of the return spring provided on the yoke. And a hole formed by the cut and raised piece of the cut and raised piece.

[Action]

In the present invention, a display unit assembly including a lead frame having a light emitting diode mounted thereon and a holder fixed to the lead frame has a relay body formed by incorporating a contact unit assembly into an electromagnet fixed on an insulating base. The display assembly is attached to the relay body by mounting the display assembly on the relay body such that the holder of the display assembly is attached to the yoke of the electromagnet and the return spring formed on the yoke is locked. The display assembly is attached to the relay body by engaging with the holes formed by the holes and positioning and assembling.

〔Example〕

1 to 4 show an embodiment of an electromagnetic relay with an operation display device according to the present invention. FIG. 1 is an overall perspective view, FIG. 2 is a wiring diagram of an exciting coil and an operation display device, and FIG. Is a plan view showing a manufacturing process of the motion display device, and FIG. 4 is a perspective view of a mounting process of the motion display device. In each drawing, the same parts as those in the conventional example shown in FIGS.

This embodiment differs from the conventional example in that the operation display device is connected in series to the exciting coil 1 to prevent erroneous display due to disconnection of the exciting coil 1, and the display unit assembly is constructed. By adopting a small chip type or melph type for the electronic parts to be used, and as a method of mounting it on the lead frame, it is downsized and the assembly time is shortened, and the operation display device is installed at the end of the assembly process. Is to eliminate the need to change the and to stabilize the mounting state of the display assembly to the yoke.

More specifically with reference to the drawings, the electromagnetic relay with an operation display device includes a relay main body 20 and a display unit assembly 40 installed on the relay main body 20.
It is composed of and. The relay body 20 is an insulating base 11
And an electromagnet 12 fixed on the insulating base 11, and a contact part assembly supported by both the insulating base 11 and the electromagnet 12.
It has 30 and. The display assembly 40 is an electronic component 44 including a chip type light emitting diode 41, a melf type protection diode 42 and a chip type resistor 43 connected in antiparallel with the light emitting diode 41, and an electronic component 44 equipped with this electronic component 44. A lead frame 45 that connects each of 44 in parallel and that can be connected in series with the exciting coil 1 of the electromagnet 12, and a holder made of synthetic resin that is detachable from the yoke 9 of the electromagnet 12 that supports the lead frame 45. It consists of 46 and. Electromagnet 12
In addition to the exciting coil 1 and the yoke 9, the return spring 10, the movable iron core 13 and a fixed iron core (not shown) are provided. The contact point assembly 30 is a normally open / normally closed switching type and has an insulating
A fixed contact terminal 14 on the normally closed side that penetrates through 11, a fixed contact terminal 15 and a movable contact terminal 16 on the normally open side, and a movable contact piece 18 supported by a movable iron core 13 of an electromagnet 12 via an insulating base 17. , And a lead wire 19 for connecting the movable contact piece 18 and the movable contact terminal 16. As shown in FIG. 3 showing the manufacturing process of the display unit assembly 40 in the order of (a), (b) and (c), first, (a)
In, the lead frame 45 punched by press is automatically mounted with the light emitting diode 41, the protective diode 42 and the resistor 43 and integrated by automatic soldering, and the first unnecessary portion 45a with the shaded portion is cut. Next, in (b), the press-fitting portion (46a) of the holder 46 is inserted into the mounting hole 45c of the lead frame 45 and heat-crimped, and the second unnecessary portion 45f for allowing the bent portions 45d and 45e to be bent. To cut. Then, in (c), the protruding portions 45d and 45e are bent, and the holder 46 is separated from the lead frame 45.
As described above, by continuously mounting and soldering the electronic components 44 on the lead frame 45, the forming of the lead frame 45 with respect to the holder 46 is facilitated, and manual work is eliminated. The working time is greatly reduced. Then, the relay body 20 of the operation display device 40
As shown in FIG. 4, the holder 46 is attached to the electromagnet 20.
Of the locking arm 46c of the yoke 9 from the side of the yoke 9 is inserted into a gap between the yoke 9 and an exciting coil (not shown). (First
(See the figure). By engaging the edge of the hole provided by cutting and raising the cut-and-raised piece formed on the yoke 9 to lock the other end of the return spring 10 whose one end is locked. Be seen.
Therefore, the mounting state of the operation display device 40 on the yoke 9 is stable, and the relay main body 20 can be mounted after the assembly is completed, so that the assembly can be performed by extending one assembly line. As a result, production management becomes easier and orders for short delivery times can be accommodated.

[Effects of the Invention] According to the invention described above, the electromagnet fixed on the insulating base is opened and closed according to the operation of the movable iron core which is attracted and released by energizing / de-energizing the exciting coil of the electromagnet. After the contact part assembly was assembled, the display part assembly consisting of the lead frame on which the light emitting diode was mounted and the synthetic resin molded holder fixed to this lead frame could be installed, which made the work process of the relay easier. The display unit assembly can be mounted without any change, and the light emitting diode is connected in series to the exciting coil by utilizing the lead portion of the lead frame of the display unit assembly.
The disconnection of the electromagnetic coil can be easily known, and the holder of the display assembly is engaged with the hole provided by the cut-and-raised piece of the cut-and-raised piece with which the return spring formed on the yoke is locked. Since the display unit assembly is fixed so that it is positioned so that the display unit assembly is stable, it is possible to provide an electromagnetic relay with an operation display device that has high operation reliability.

[Brief description of drawings]

1 to 4 show an embodiment of an electromagnetic relay with an operation display device according to the present invention, and FIG. 1 is an overall perspective view, and FIG.
FIG. 4 is a connection diagram of the excitation coil and the operation display device. FIG. 3 is a plan view showing a manufacturing process of the operation display device. FIG. 4 is a perspective view showing a mounting process of the operation display device. FIGS. 7 and 8 show different conventional electromagnetic relays with operation display devices, FIG. 5 is a perspective view of a main part, FIG. 6 is a connection diagram of FIG. 5, and FIG. 7 is a connection diagram of different conventional examples. is there. 1: Excitation coil, 9: Yoke, 12: Electromagnet, 30: Contact assembly, 4
0: display assembly, 41: light emitting diode, 42: protective diode, 43: resistor.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshiyuki Tanaka 1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. (56) References 56-114045 (JP, U) Actually opened 57-161843 (JP, U) Actually opened 57-67352 (JP, U) Actually opened 59-90156 (JP, U) Actually opened 60-129049 (JP , U) Sukeko 46-13892 (JP, Y1)

Claims (1)

[Claims] 1. An electromagnetic relay having an electromagnet fixed on an insulating base, and a contact part assembly which opens and closes according to the operation of a movable core that is attracted and released by energizing or deenergizing an exciting coil of the electromagnet. , A display unit assembly comprising a lead frame having at least a light emitting diode mounted thereon and having a lead-out portion for connecting the light emitting diode in series to an exciting coil of an electromagnet and a synthetic resin molded holder fixed to the lead frame, The holder of the display assembly has a locking arm attached to the yoke of the electromagnet, and the claw at the tip of this locking arm cuts the cut-and-raised piece to which one end of the return spring provided on the yoke is locked. An electromagnetic relay with an operation display device, characterized in that the electromagnetic relay engages with a hole formed by raising.