JP2000021279A - Electromagnetic relay and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of increasing control electric power, decreasing an installation area, and facilitating the production and assembly of components in the electromagnetic relay assembled in on vehicle equipment mounted on an automobile, acoustic equipment, and a personal computer. SOLUTION: This electromagnetic relay has a bobbin 12 having a flange 15 and around which a coil 13 is wound; a column-shaped core 56 having a square head 58; a yoke 57 arranged in the lower part of the bobbin 12 and fixed to the core 56; a moving contact spring 71 arranged in the lower part of the yoke 57 and fixed to the head 58 at one end; and an armature 72 held with the moving contact spring 71 so as to be capable of swinging and facing the head 58 and the yoke 57; and the bobbin 12 has a plurality of coil terminal pieces 11 insert 1 molded to the flange 15 on one side, the coil terminal piece 11 has a coil binding part 16 projecting to the upper part of the flange 15 and connected to the terminal of the coil 13, and a coil terminal part 17 projecting downward of the flange 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle equipment installed in an automobile or the like, an audio equipment, an electromagnetic relay incorporated in a personal computer, and the like, and more particularly to the manufacture of components capable of increasing control power and reducing the occupied area. And a structure of an electromagnetic relay which is easy to assemble.

2. Description of the Related Art In recent years, the on-board components have been electrified, and many electromagnetic relays have been used as means for controlling a motor, a solenoid, and the like. Relays are required to have a small occupied area.

Also, electromagnetic relays for controlling power sources such as motors and solenoids through which a relatively large current flows require high control power capacity, and since many electromagnetic relays are mounted, manufacture and assembly of parts. However, it is required that cost reduction be possible.

However, electromagnetic relays for high power currently used generally have a large occupied area and volume and are difficult to apply to the above-mentioned applications, and small electromagnetic relays used for control of various signals and the like are not suitable for high-density mounting. Although suitable, there is a limit in increasing the control power capacity due to its structure.

[0005] Therefore, there is a demand for the development of an electromagnetic relay which can increase the control power and reduce the occupied area and can easily manufacture and assemble parts.

[0006]

2. Description of the Related Art FIG. 4 is an exploded perspective view showing the structure of a conventional electromagnetic relay, and FIG. 5 is a view showing the connection of a coil terminal to a coil bar.

The conventional electromagnetic relay comprises a base 3, a break-side fixed contact spring 4A and a make-side fixed contact spring 4B as shown in FIG. 4, and the break-side fixed contact spring 4A press-fitted into the base 3 and the make-side fixed. The drive unit 5 is disposed above the contact spring 4B.

The break-side fixed contact spring 4A has a first contact fixing arm 41 and a first lead terminal portion 42 intersecting with the first contact fixing arm 41, and the first lead terminal portion 42 is made of a resin base. 3 is vertically press-fitted from above into the square hole 33 provided therein and penetrates the base 3.

The make-side fixed contact spring 4B has a second contact fixing arm 43 and a second lead terminal portion 44 intersecting with the second contact fixing arm 43, and the second lead terminal portion 44 is disposed from the side. It has a fixing piece 45 that is press-fitted into a square hole 35 of the base 3 when inserted into the notch 34 of the base 3.

On the other hand, the driving section 5 has a pair of coil terminals on one side.
A bobbin 52 made of resin in which a bobbin 51 is implanted, and a coil 53 wound around the bobbin 52, a tongue piece 36 provided on the base 3 is fitted therein, and a hooking portion for engaging the drive unit 5 with the base 3. 54 are provided at the lower ends on both sides of the bobbin 52.

A pair of coil terminals 51 implanted below the bobbin 52 has a coiled portion 55 for winding and soldering the end of the coil 53. When the coil 53 is wound, as shown in FIG. )
As shown in (1), the coiled portion 55 is bent and released outside the winding area, and then wound.

The ends of the pulled out coils 53 are respectively wound around coil bent portions 55 which are extended along the bobbins 52 and bent, and bent after the ends of the coils 53 are soldered to the coil bent portions 55. Coil
55 is extended to its original state.

The drive unit 5 also includes an iron core 56 penetrating the bobbin 52.
And an L-shaped yoke 57 attached to the bobbin 52 and fixed to the tip of the iron core 56. The iron core 56 has a square crown 58 formed at one end, and the other end is a short piece of the yoke 57. Through hole provided on the side
It is inserted in 59 and crimped.

The bobbin 52 is provided on both sides with a crown 58 of an iron core 56 and a yoke.
When the other end of the iron core 56 is swaged to the short side of the yoke 57, the top portion 58 of the iron core 56 and the yoke 57 of the yoke 57 are provided. The short side is accommodated in the concave portions 60 and 61.

The drive unit 5 is further disposed below the yoke 57 in parallel with the iron core 56 and has one end fixed to the top 58 of the iron core 56 and an L-shaped movable contact spring 71 fixed to the movable contact spring 71. The top
There is provided an armature assembly 7 comprising an armature 72 facing the side surface of the yoke 58 and the side surface of the yoke 57.

The armature 72 is fixed by fitting a projection provided on the lower surface into a through hole (both not shown) of the movable contact spring 71, and the armature assembly 7 fixes the through hole 73 of the movable contact spring 71. It is fixed by inserting and caulking into a projection (not shown) of the crown 58.

The movable contact spring 71 includes a pair of lead terminals 74 extending laterally from the side fixed to the crown 58 and bent downward. The pair of coil terminals 51 and the lead terminals 74 are connected to the base 3. Square hole 3 provided at the corresponding position above
7 and 38 are inserted respectively.

[0018]

However, in the conventional electromagnetic relay, a pair of coil terminals provided with coil barbs are implanted below the bobbin as shown in the drawing, and both ends of the coil pulled out at the time of connection are connected. Are extended downward along the bobbin and are respectively wound around the coil barbs.

At this time, if the wire interposed between the coil and the coil bar is tight, the wire will break due to heating or vibration during assembly, and if the wire between the coil and the coil bar is long, the wire will be Is not determined, and breaks due to contact with other members during assembly.

Further, in the conventional electromagnetic relay, as shown in the figure, a coil barb provided on the side of the coil terminal protrudes into the winding area of the bobbin. After the completion of the above, it is necessary to return the coil bar to the original position.

As described above, the conventional electromagnetic relay in which the coiled portion protrudes into the winding area of the bobbin requires extra work before and after the winding, and when winding the terminal after the winding around the coiled portion, the disconnection of the wire is difficult. There has been a problem that sufficient attention is required to reduce the factors.

An object of the present invention is to provide an electromagnetic relay capable of increasing control power and reducing the occupied area, and which can easily manufacture and assemble parts.

[0023]

FIG. 1 is an exploded perspective view showing a main part of an electromagnetic relay according to the present invention. The same object is denoted by the same symbol throughout the drawings.

The above-mentioned problem is caused by a bobbin 12 having a flange portion 15 at both ends and a coil 13 wound therearound, a cylindrical iron core 56 having a rectangular top portion 58 and penetrating through the bobbin 12, and a lower portion provided below the bobbin 12. L-shaped yoke 57 fixed to iron core 56 and yoke 57
A movable contact spring 71 disposed parallel to the iron core 56 at one end and fixed at one end to the crown 58, and a movable contact spring 71 slidably held by a side of the crown 58 and a side of the yoke 57. And the bobbin 12 has one of the flange portions.
15 includes a plurality of coil terminal pieces 11 which are insert-molded into the coil terminal pieces 11, and the coil terminal pieces 11 protrude above the flange portion 15 and protrude downward from the flange portion 15 to which the terminal of the coil 13 is connected. This is achieved by the electromagnetic relay according to the present invention, which includes a coil terminal portion 17 having the same structure as that of the first embodiment.

The bobbin around which the coil is wound,
A cylindrical iron core with a square crown and penetrating the bobbin,
An L-shaped yoke attached below the bobbin and fixed to the iron core, a movable contact spring disposed below the yoke parallel to the iron core and having one end fixed to the top of the head, and a movable contact spring. The electromagnetic relay of the present invention, which is movably held and has an armature facing the side surface of the crown and the side surface of the yoke, allows the length of the bobbin to be selected relatively freely, so that the predetermined length can be obtained without increasing the coil diameter. , The control power can be increased and the occupied area can be reduced.

Also, the bobbin has a plurality of coil terminal pieces insert-molded on one of the flange portions, and the coil terminal pieces project from the upper portion of the flange portion and have a coil shank portion to which a terminal of the coil is connected; The electromagnetic relay of the present invention, which has a coil terminal portion projecting below the portion, has both ends of the pulled-out coil wound around a coil barbed portion located near the coil, so that it is similar to a conventional electromagnetic relay. It is not necessary to extend both ends of the coil downward along the bobbin, and it is not necessary to extend the wire due to heating or vibration during assembly, or to break the wire due to contact with other members during assembly because the position of the wire is not determined. Disconnection can be eliminated.

Further, since the coiled portion inserted into the bobbin does not protrude into the winding region as in the conventional electromagnetic relay, the coiled portion is released outside the winding region prior to winding, and after the completion of winding, the coil is removed from the coil. There is no need to return the shaft to its original position.

As a result, the base, break-side, and make-side fixed contact springs, including the components of the drive section, have a structure suitable for mass production. Automation of press-fitting, mounting of the drive unit, and the like are further facilitated.

That is, it is possible to realize an electromagnetic relay that can increase the control power and reduce the occupied area and can easily manufacture and assemble parts.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a perspective view showing a method of forming a coil terminal strip, and FIG. 3 is a perspective view showing a method of forming a bobbin.

Although the electromagnetic relay according to the present invention is not shown in the drawing, it has a base and break-side and make-side fixed contact springs press-fitted into the base, like the conventional electromagnetic relay, and has break-side and make-side fixed contacts. The drive unit 1 is arranged above the spring.

As shown in FIG. 1, the drive unit 1 has a bobbin 12 having a pair of coil terminal pieces 11 planted on one side and a coil 13 wound around the bobbin 12, and a tongue piece provided on the base is fitted therein. At the lower end on both sides of the bobbin 12, hooks 14 for engaging the drive unit 1 on the base are provided.

A pair of coil terminal pieces 11 insert-molded on one flange portion 15 of the bobbin 12
The coil 15 includes a coil flaring portion 16 protruding from both sides of the upper portion of the coil 15 and connected to a terminal of the coil 13, and a coil terminal portion 17 protruding below the flange portion 15.

The structure of the coil terminal strip 11 will now be described in more detail. As shown in FIG. 2, the coil terminal strip 11 includes a coil connecting portion 16 and a coil terminal portion 17.
Are integrally formed using a metal plate together with a connecting portion 18 interposed therebetween for connecting the both.

The coil shank 16 and the coil terminal 17 formed of a metal plate are arranged so that the surfaces thereof are parallel to the flange 15 as shown in FIG. It is bent at a right angle to the coil shank 16 and the coil terminal 17.

As shown in FIG. 5 (b), the ends of the coil 13 are coiled portions projecting above the flange portion 15, respectively.
Coiled part 16 is bent from the root after the end of coil 13 is soldered and flange part
It is stored in 15 notches 21.

The drive unit 1 also includes an iron core 56 penetrating the bobbin 12.
And an L-shaped yoke 57 attached to the bobbin 12 and fixed to the tip of the iron core 56. The iron core 56 has a square crown 58 formed at one end, and the other end is a short piece of the yoke 57. Through hole provided on the side
It is inserted in 59 and crimped.

The bobbin 12 is provided on both sides with a crown 58 of an iron core 56 and a yoke.
When the other end of the iron core 56 is swaged to the short side of the yoke 57, the top portion 58 of the iron core 56 and the yoke 57 of the yoke 57 are provided. The short side is accommodated in the concave portions 60 and 61.

The driving unit 1 is further disposed below the yoke 57 in parallel with the iron core 56 and has one end fixed to the top 58 of the iron core 56 and an L-shaped movable contact spring 71 fixed to the movable contact spring 71. The top
There is provided an armature assembly 7 comprising an armature 72 facing the side surface of the yoke 58 and the side surface of the yoke 57.

The armature 72 is fixed by fitting a projection provided on the lower surface into a through-hole (both not shown) of the movable contact spring 71, and the armature assembly 7 fixes the through-hole 73 of the movable contact spring 71. It is fixed by inserting and caulking into a projection (not shown) of the crown 58.

The movable contact spring 71 has a pair of lead terminals 74 extending laterally from the side fixed to the crown 58 and bent downward. The pair of coil terminals 17 and the lead terminals 74 are, for example, Each is fitted into a square hole provided at a corresponding position on the base.

The manufacturing of the electromagnetic relay according to the present invention includes a step of forming a coil terminal piece and a step of forming a bobbin for insert-forming the coil terminal piece. In the coil terminal piece forming step, a plurality of coil terminal pieces inserted during bobbin formation are provided. 11 are formed as shown in FIG.

That is, a plurality of coil terminal pieces 11 and a frame portion 19 for supporting the coil terminal pieces 11 using a hoop-shaped metal plate.
Are integrally formed, and the coil shaving portion 16 and the coil terminal portion 17 are formed.
Are joined to the frame portion 19 to position the coil terminal strip 11 at a predetermined position.

In the bobbin forming step, the coil terminal piece formed in the coil terminal piece forming step as shown in FIG.
11 is supplied to a mold, and a bobbin 12 made of an insulating resin and having a pair of coil terminal pieces 11 inserted into one flange portion 15 is continuously formed.

The coil terminal strip 11 has a connecting portion 18 bent at a right angle, which is inserted into both sides of an opening 20 provided in the flange portion 15, so that the coil shaving portion 16 and the coil terminal portion
The outer shape of the bobbin 12 does not increase even if the members 17 are arranged in parallel with the flange portion 15.

The bobbin around which the coil is wound,
A cylindrical iron core having a rectangular crown and penetrating the bobbin; an L-shaped yoke attached to the lower part of the bobbin and fixed to the iron core; and one end provided below the yoke and parallel to the iron core. The electromagnetic relay of the present invention has a movable contact spring fixed to the top of the head, and an armature that is swingably held by the movable contact spring and faces the side surface of the top of the head and the side surface of the yoke. Since the size can be relatively freely selected, a predetermined suction force can be obtained without increasing the coil diameter, and the control power can be increased and the occupied area can be reduced.

Further, the bobbin has a plurality of coil terminal pieces insert-molded on one of the flange portions, and the coil terminal pieces project from the upper portion of the flange portion and have a coil flank to which a terminal of the coil is connected, and a flange. The electromagnetic relay of the present invention, which has a coil terminal portion projecting below the portion, has both ends of the pulled-out coil wound around a coil barbed portion located near the coil, so that it is similar to a conventional electromagnetic relay. It is not necessary to extend both ends of the coil downward along the bobbin, and it is not necessary to extend the wire due to heating or vibration during assembly, or to break the wire due to contact with other members during assembly because the position of the wire is not determined. Disconnection can be eliminated.

Further, since the coiled portion inserted into the bobbin does not protrude into the winding region as in the conventional electromagnetic relay, the coiled portion is released outside the winding region prior to winding, and after the completion of the winding, the coil is removed from the coil. There is no need to return the shaft to its original position.

As a result, the base, break-side and make-side fixed contact springs including the components of the drive section have a structure suitable for mass production, so that the assembly of the drive section can be automated, and the break-side and make-side fixed contact springs can be used. Automation of press-fitting, mounting of the drive unit, and the like are further facilitated.

That is, it is possible to realize an electromagnetic relay in which the control power can be increased and the occupied area can be reduced, and the manufacture and assembly of parts are easy.

[0051]

As described above, according to the present invention, it is possible to provide an electromagnetic relay in which the control power can be increased and the occupied area can be reduced, and the production and assembly of parts can be easily performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of an electromagnetic relay according to the present invention.

FIG. 2 is a perspective view showing a method of forming a coil terminal piece.

FIG. 3 is a perspective view showing a method of forming a bobbin.

FIG. 4 is an exploded perspective view showing the structure of a conventional electromagnetic relay.

FIG. 5 is a diagram showing connection of a coil terminal to a coil barb.

[Explanation of symbols]

 1 Drive section 7 Armature assembly 11 Coil terminal strip 12 Bobbin 13 Coil 14 Hook section 15 Flange section 16 Coil gang section 17 Coil terminal section 18 Connection section 19 Frame section 20 Opening 21 Notch 56 Iron core 57 Yoke 58 head Top 59 Through hole 60, 61 recess 71 Movable contact spring 72 Armature 73 Through hole 74 Lead terminal

Continuing on the front page (72) Inventor Kenzo Nakamura 2-3-5 Higashi Gotanda, Shinagawa-ku, Tokyo Inside Fujitsu Takamizawa Component Co., Ltd. (72) Inventor Yoshio Okamoto 2-3-5 Higashi-Gotanda, Shinagawa-ku, Tokyo Fujitsu Takamisawa Component Co., Ltd.

Claims (3)

[Claims] 1. A bobbin provided with flange portions at both ends and wound with a coil, a cylindrical iron core having a rectangular crown and penetrating through the bobbin, and provided below the bobbin and secured to the iron core. An L-shaped yoke, a movable contact spring disposed below the yoke in parallel with the iron core and having one end fixed to the top of the head, the head being held by the movable contact spring in a swingable manner. A bobbin having a plurality of coil terminal pieces insert-molded on one of the flange portions, wherein the coil terminal piece is provided with the flange portion; An electromagnetic relay, comprising: a coil shank protruding above an upper end of the coil and connected to a terminal of the coil; and a coil terminal protruding below the flange. 2. The coil terminal piece includes the coil barb and the coil terminal unit, and a connecting unit that connects the coil barb and the coil terminal unit. The said coil terminal part and the said connection part are integrally formed using a metal plate, The said connection part is bent at right angles with respect to the said coil helmet part and this coil terminal part, The Claims characterized by the above-mentioned. 2. The electromagnetic relay according to 1. 3. A coil terminal piece forming step and a bobbin forming step, wherein in the coil terminal piece forming step, a plurality of coil terminal pieces and a frame supporting the coil terminal pieces using a hoop-shaped metal plate. And a coil terminal connected to the coil terminal and having a coil terminal and a coil terminal connected to each other through a connecting portion. And a coil bobbin is formed by inserting the coil terminal piece into one of the flange portions in the bobbin forming step.