JPH0212721A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To make it possible to contain a display device within even a microminiature electromagnetic relay without providing a special space for it, by bending the upper ends of the coils terminals of an operating coil and mounting the display device directly on the bent parts. CONSTITUTION:From a terminal base 11 protrudes upwards and downwards coil terminals 12 whose lower ends 12a penetrate an insulating substrate 1 to protrude from its lower side face and constitute connecting parts to be soldered to a printed circuit board. The upper ends 12b of the coil terminals 12 are squashed flatly and bent orthogonally in perpendicular direction to the plate face of a squared-U-form iron core 2. A chip type light emitting diode 13 and a chip type diode 14 for protecting said light emitting diode 13 from backward voltage are mounted being bridged between the bent parts 12b and 12b, and connected by soldering. It becomes thereby possible to contain a display device within even a microminiature electromagnetic relay and to miniaturize an equipment as well as to make it cheap.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an ultra-small electromagnetic relay mounted on a printed wiring board, and particularly relates to the structure of mounting a display element that emits light when the electromagnetic relay is in operation.

[Conventional technology]

2. Description of the Related Art Among electromagnetic relays such as power relays having a relatively large contact capacity, those equipped with a display element are known. This is an electromagnetic relay in which a printed wiring board carrying a display element such as a light emitting diode is mounted inside the electromagnetic relay, and the display element is connected to the lead wire of the operating coil and the coil terminal by soldering.

[Problem to be solved by the invention]

On the other hand, in ultra-compact electromagnetic relays that are mounted on printed wiring boards for input/output interfaces in electronic circuits, it is difficult to secure internal installation space, so those with built-in display elements are Instead, a display element is provided in the input circuit of the operating coil outside the electromagnetic relay. For this reason, the printed wiring board on which the electromagnetic relay is mounted has become larger, and the number of external wiring steps has increased, resulting in high costs (
There is a problem with becoming. By the way, the above-mentioned ultra-compact electromagnetic relay is required to be more and more miniaturized in response to the trend toward miniaturization and higher integration of electronic components-M. Therefore, the present applicant previously filed an application for an electromagnetic relay that is small, highly productive, and reliable and can satisfy such requirements (Japanese Patent Application No. 63-57).
No. 824). This invention is based on the electromagnetic relay according to the above application, by incorporating a display element into the electromagnetic relay to eliminate the need for an external display element, thereby reducing the size and cost of a printed wiring board on which the electromagnetic relay is mounted. The purpose of this invention is to provide an electromagnetic relay for mounting on a printed wiring board.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a flat portal iron core whose legs are inserted into an insulating substrate and fixed thereto, and a conductive wire is wound around the body of the portal iron core via a winding frame. an operating coil having a pair of rod-shaped coil terminals fixed to a terminal block integrally formed with the winding frame along one leg of the portal core; and an operating coil fixed to the insulating substrate inside the portal core. a fixed contact spring and a movable contact spring, which are provided in a fixed contact spring and a movable contact spring; and a flat plate-like armature that is rotatably arranged so as to bridge both legs of the portal core and is in contact with the back surface of the movable contact spring via an insulating piece. In this electromagnetic relay, the upper end of the coil terminal protruding from the terminal block is bent in a direction perpendicular to the plate surface of the portal core, and a display element that emits light when the operating coil is energized is mounted on this bent portion.

[For use]

By bending the upper end of the coil terminal of the operating coil and mounting the display element directly on this bent part, there is no need for a printed wiring board to mount the display element, and even in ultra-small electromagnetic relays, a special space is provided to store the display element. A display element can be built-in without providing a display element.

【Example】

Hereinafter, the present invention will be explained in detail based on the drawings. Figures 1 and 2 show a first embodiment of the invention, Figure 1 is a perspective view of an electromagnetic relay with the cover cut out to reveal the inside, and Figure 2 is an internal connection diagram of the electromagnetic relay. It is. In FIG. 1, reference numeral 1 denotes a rectangular insulating substrate made of molded resin, and a flat gate-shaped iron core 2 is fixed to this insulating substrate 1 by press-fitting its leg ends into insertion holes (not shown) in the insulating substrate 1. has been done. Reference numerals 3 and 4 designate a movable contact spring and a fixed contact spring, each made of a phosphor bronze plate, each having a movable contact (not shown) and a fixed contact 5, which are embedded in the insulating substrate 1 inside the portal core 2. It is fixed in one piece. The terminal portions 3a and 4a are inserted into a printed wiring board (not shown) and soldered. Although not shown in detail, 6 is an inverted gate-shaped flat armature arranged so as to bridge both legs of the gate-shaped iron core 2.
A leg portion at the tip of one end (the left end in the figure) is inserted into a bearing hole (not shown) of the insulating substrate 1, and is supported so as to be rotatable. In this state, the armature 6 is in contact with the back surface of the movable contact spring 3 via an insulating piece 7 fitted into the body. A transparent cover 8 protects the electromagnetic relay from external force and dust, and is fitted and fixed to the periphery of the insulating substrate 1. A winding frame 9 made of molded resin is fitted into the body of the portal core 2, and a conductor is wound around this winding frame 9 to form an operating coil 10.
is formed. A terminal block 11 is integrally formed at one end of the winding frame 9 (the right end in the figure), and a pair of rod-shaped wires are attached to the terminal block 11 along one of the sections (right side in the figure) of the portal core 2. A coil terminal 12 is integrally fixed by embedding. The coil terminal 12 protrudes above and below the terminal block 11,
The lower end 12a penetrates the insulating substrate 1 and protrudes from the lower surface thereof, forming a connection portion to be soldered to a printed wiring board (not shown). The upper end 12b of the coil terminal 12 is flattened and bent at right angles in a direction perpendicular to the plate surface of the portal core 2. Then, this flat bent part 1
2b. A chip-shaped light-emitting diode 13 as a display element and a chip-shaped diode 14 for protecting the light-emitting diode 13 from reverse voltage are mounted to bridge between the LEDs 12b and connected by soldering. In addition, the operation coil 10
The lead wires are respectively wound around the bases of the bent portions 12b and 12b, and then connected by soldering. FIG. 2 shows the internal connections of such an electromagnetic relay, in which a light emitting diode 13 and a diode 14 are connected in parallel to the operating coil 10 between the coil terminals 12 and 12. In such a configuration, when an operating voltage is applied between the coil terminals 12 and 12, the operating coil 10 is excited and the portal core 2 attracts the armature 6, and the armature 6 connects to the movable contact via the insulating piece 7. Press the spring 3 against the fixed contact spring 4. At the same time, the light emitting diode 13 lights up to indicate that the electromagnetic relay has operated. 3 and 4 show a second embodiment of the present invention, with FIG. 3 being a perspective view of the main parts, and FIG. 4 being an internal connection diagram of the electromagnetic relay. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In Fig. 3, the coil terminal 12 is connected to one side (on the right side of the figure).
A bent portion 12b is formed only in the bent portion 1.
A relay fitting 15 is provided on the collar portion 9a of the winding frame 9 by embedding or the like so as to face the winding frame 2b. A light emitting diode 13 and a resistor 16 for suppressing the current flowing through the light emitting diode 13 are mounted between the bent portion 12b and the relay fitting 15, and are connected by soldering. Furthermore, a notch 17 is provided in a portion of the insulating substrate 1 through which the coil terminal 12 passes, and the coil terminal 12 is partially exposed. Then, at that part, coil terminal 12.1
A diode 14 for protecting the light emitting diode 13 from reverse voltage is mounted between the two and connected by soldering. Further, one end of the lead wire of the operating coil 10 is connected to the relay fitting 5, and the other end is connected to the upper end of the coil terminal 12 on the left side of the figure. Figure 4 is an internal connection diagram of the electromagnetic relay described above, and shows the operating coil 1.
A light emitting diode 13 is connected in series to the light emitting diode 13, and a resistor 16 is connected in parallel to the light emitting diode 13. Furthermore, a diode 14 is connected in parallel between the coil terminals 12 and 12. In such a configuration, when an operating voltage is applied to the electromagnetic relay, the light emitting diode 13 lights up at the same time, which is the same as in the first embodiment, but in the second embodiment, the light emitting diode 13 lights up in series with the operating coil 10. Since the diode 13 is connected, if the operating coil 1° is disconnected, the light emitting diode 13 will no longer emit light, making it possible to provide a display function that is completely synchronized with the operation of the electromagnetic relay.

【Effect of the invention】

According to the present invention, it is possible to incorporate a display element into an ultra-small electromagnetic relay, eliminating the need for space and effort for attaching a display element outside the electromagnetic relay, and making the device smaller and cheaper. 4,

[Brief explanation of the drawing]

The figures show embodiments of the present invention; Fig. 1 is a perspective view of the first embodiment, Fig. 2 is an internal connection diagram of the electromagnetic relay shown in Fig. 1, and Fig. 3 is a main part of the second embodiment. The perspective view, FIG. 4, is an internal connection diagram of the electromagnetic relay shown in FIG. 3. DESCRIPTION OF SYMBOLS 1... Insulating board, 2... Portal iron core, 3... Movable contact spring, 4... Fixed contact spring, 6... Armature, 9... Winding frame, 10...・Operation coil, 11・
...Terminal block, 12... Coil terminal, 13... Light emitting diode, 14... Diode, 15... Relay fitting, 16... Resistor. Funeral diagram 1 ÷ Diagram porridge diagram Funeral diagram

Claims (1)

[Claims] 1) A flat portal iron core whose legs are inserted into an insulating substrate and fixed thereto, and a terminal block in which a conductor is wound around the body of the portal iron core via a winding frame and integrally formed with the winding frame. an operating coil having a pair of rod-shaped coil terminals fixed along one leg of the portal core, and a fixed contact spring and a movable contact provided inside the portal core and fixed to the insulating substrate. An electromagnetic relay consisting of a spring and a flat armature arranged so as to be pivotable so as to bridge both legs of the portal core and in contact with the back surface of the movable contact spring via an insulating piece, which protrudes from the terminal block. An electromagnetic relay characterized in that the upper end of a coil terminal is bent in a direction perpendicular to the plate surface of a gate-shaped iron core, and a display element that emits light when an operating coil is energized is mounted on this bent part.