JPH03250715A - Coil bobbin for electromagnet - Google Patents

Abstract

PURPOSE:To ensure the distance between terminals by forming a terminal processing piece, external terminal piece, and a coupling piece which couples the processing piece and terminal piece with each other and is provided to a flange section in one body and, at the same time, forming the external terminal piece of one terminal nonlinear. CONSTITUTION:Two pieces of terminals 6 and 7 are respectively constituted of terminal processing pieces 6a and 7a connecting coil ends, external terminal pieces 6b and 7b exposed to the outside, and coupling pieces 6a and 7c which respectively couple the pieces 6a and 7a with the pieces 6b and 7b and are provided to a flange section 4, all of which are composed of a conductive sheet material and united in one body, and the terminals 6 and 7 have different shapes. Namely, while the piece 6b is formed in the same plane, the entire body is not formed linear, but to have an L-shape from the vicinity of the middle point to the front end. Accordingly, the external terminal pieces 6b and 7b do not face each other even when the flange section 4 is not extended so much to the outside along the axial direction. Therefore, a prescribed insulating distance can be ensured between the terminals 6 and 7 and the entire body of the electric equipment using this electromagnet can be reduced, since the distance between the terminals can be ensured without reducing the space of the coil.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coil bobbin for an electromagnet that is assembled into an electrical device such as a thin electromagnetic relay.

[Conventional technology]

A thin electrical device, such as an electromagnetic relay, uses a case whose width is such that the wound outer shell of the electromagnet's coil fits therein almost exactly. Therefore, other contact devices and the like are made to fit within the winding width of the coil. In this case, it may be difficult to ensure an insulating distance between the two terminals that are electrically connected to the end of the coil and provided on the coil bobbin after the two terminals are connected to an external electric circuit.

As a coil bobbin of such an electromagnet, there is one having a structure shown in FIGS. 5 to 7. That is, coil bobbin A
is molded from synthetic resin and has a cylindrical winding trunk B around which the coil E is wound, and collar parts C and D connected to both ends of the winding trunk B. Two opposing pieces Ca and Cb extending axially outward toward the coil bobbin are arranged in series on one of the flange parts C, and terminals Fa and Fb are provided on each opposing piece Ca and Cb.

These terminals Fa and Fb have the same substantially linear shape, and the coil terminal is connected to the part that slightly protrudes from the top surface of the flange C, and the part that protrudes long from the bottom surface of the flange C is connected to the electrical device. exposed to the outside. The terminal Fa is located near the flange C, and the terminal Fb is located far away from the flange C so that they do not face each other. Therefore, both terminals P
The distance between terminals a and Fb is larger than when they face each other, thereby ensuring a predetermined insulation distance between terminals Fa and Fb when both terminals are connected to an external electrical circuit.

The electromagnet 11 has an iron core 12 inserted into the coil bobbin^,
an L-shaped yoke 13 that caulks and fixes one end of the iron core 11;
It is composed of an armature 14 rotatably supported by a yoke 13. The contact device 15 includes a fixed contact plate 16 provided with fixed contacts, and a fixed contact terminal 1 fixed to the fixed contact plate 16.
7. A movable contact plate 18 provided with a movable contact driven by the armature 14, a movable contact terminal 19 to which the movable contact plate 18 is fixed.
, and a synthetic resin body 20 to which these are attached and to which the electromagnet 11 (specifically, the yoke 13) is attached.
Consisted of. 21 is a case that accommodates all the materials,
The opening of the case 21 and the lower end surface of the body 20 are sealed with a sealing material.

It is.

(Problem to be Solved by the Invention) The above-mentioned coil bobbin of the electromagnet has a large distance between both terminals Fa and Fb, making it possible to secure a predetermined insulation interval, but the space of the coil E is constant. In this case, the longitudinal dimension of the case 21 becomes large.Furthermore, if this dimension is not increased, the space for the coil E becomes small and the required ampere turns cannot be secured.

The present invention has been made in view of the above circumstances, and its object is to provide an electromagnetic coil bobbin that can secure a distance between terminals without reducing the coil space.

[Means for Solving the Problems] In order to solve the problems, the electromagnetic coil bobbin of the present invention includes a cylindrical winding drum around which a coil is wound, and flanges connected to both ends of the winding drum. A coil bobbin made of synthetic resin that is incorporated into an electrical device having a coil bobbin made of TiN stone and having two terminals, which connect the coil terminal and are exposed to the outside of the electrical device, provided on one of the flanges. In the above-mentioned two terminals, a terminal processing piece that connects the coil terminal, an external terminal piece that is exposed to the outside, and a connecting piece that connects these and is provided on the flange are integrally formed, and the two terminals are connected. At least one of the external terminal pieces is formed in a non-linear shape so that the external terminal pieces do not face each other when the pieces are opposed to each other.

(Function) According to the present invention, the outer terminal pieces do not face each other even though the collar of the coil bobbin in which each terminal is provided does not have to extend outward in the axial direction so much, so that the predetermined insulation distance between each terminal can be maintained. can be secured.

(Example) Hereinafter, an example of the present invention incorporated into an electromagnetic relay will be described in the first example.
This will be explained based on FIGS. 4 to 4. In addition, since only the coil bobbin is different from the conventional example described previously, and other members are substantially the same, the same reference numerals will be given and detailed explanation will be omitted.

The coil bobbin 1 is molded from synthetic resin, and the coil 5
It has a rectangular tube-shaped winding drum 2 around which the winding drum 2 is wound, and flanges 3 and 4 connected to both ends of the winding trunk 2.

Two opposing pieces 3a and 3b extending outward in the axial direction of the coil bobbin 1 are arranged in series on both sides of the one flange 3 in the width direction, and terminals 6 and 7 are simultaneously molded on each opposing piece 3a and 3b. It is set up at. There is a gap between each of the facing pieces 3a and 3b in which the yoke 13 of the electromagnet can fit, so that the gap is slightly larger than the through-hole of the winding drum section 2. Further, each of the facing pieces 3a, 3b has a recess 3 at the bottom of the proximal end side of the outer surface thereof.
c, 3d.

The two terminals 6 and 7 are both made of conductive thin plate material.
Terminal processing pieces 6a and 7a for connecting the coil terminals, external terminal pieces 6b and 7b exposed to the outside, and connecting pieces 6c and 7c that connect these and are provided on the flange 3.4 are integrally formed. However, the shape is different. That is, the component shapes of the two terminals 6 and 7 are as shown in FIG.

One terminal 6 has a U-shape when viewed from the side, and the intermediate connecting piece 6c has an L-shape with a horizontal piece 6d and a vertical piece 6e.

A narrow terminal processing piece 6a is connected from the end of the horizontal piece 6d, and an external terminal piece 6b having the same width as the vertical piece 6e is connected from the end of the vertical piece 6e. This external terminal piece 6b is
All of the parts on the same plane are not linear, but are L-shaped from the middle to the tip.

Similarly, the other terminal 7 has a U-shape when viewed from the side, and the intermediate connecting piece 7c has an L-shape with a horizontal piece 7d and a vertical piece 7e, and has a narrow width from the end of the horizontal piece 7d. The terminal processing piece 7a is
External terminal pieces 7b having the same width as the vertical piece 7e are connected from the end of the vertical piece 7e. However, this external terminal piece 7
b are all within the same plane and are linear.

Therefore, the coil bobbin 1 is placed in the molding die with both connecting pieces 6c.
, 7c are mounted so that they face each other, and the mold is filled with molten synthetic resin. As a result, both connecting pieces 6
Only the terminals c and 7c are buried in the opposing pieces 3a and 3b, and the terminal processing pieces 6a and 7a and the external terminal pieces 6b and 7b are exposed. At this time, the terminal processing pieces 6a, 7a are exposed from the upper part of each recess 3c3d.

Further, the coil 5 is wound around the winding trunk 2, and its terminal ends are connected to the terminal processing pieces 6a, 7a. And terminal processing piece 6a
, 7a are bent at an angle of about 90 degrees so that the terminal pieces 6b and 7b are bent in the same direction as the connecting pieces 6c and 7c, respectively, so that the outer terminal pieces 6b and 7b are accommodated in the respective recesses 3c and 3d. As a result, terminal 6,
7, both connecting pieces 6c, 7c and both sex part terminal pieces 6b, 7b face each other up to the middle, and both sex part terminal pieces 6b, 7b
From around the middle to the tip, they no longer face each other. Thereby, a predetermined insulation distance can be secured between the tips of the bisexual terminal pieces 6b, 7b in a state where they are connected to the external electric circuit by soldering or the like.

As explained in the conventional example, the electromagnet 11 has an iron core 12, L
Consisting of a letter-shaped yoke 13 and an armature 14, the contact device 15 also includes a fixed contact plate 16 and a fixed contact terminal 17.
, a movable contact plate 18, a movable contact terminal 19, and a body 20. These are then housed in case 21,
The opening of the case 21 and the lower end surface of the body 20 are covered with sealing material 2.
2, the electromagnetic relay is assembled.

In this embodiment, the terminal has been described as being molded simultaneously with the coil bobbin, but it is also possible to provide a groove in the opposing piece connected to the flange and to insert the terminal by gluing or press-fitting the terminal. Further, both terminal pieces of both sexes of the two terminals may be made non-linear. Furthermore, the electromagnet using this coil bobbin can be applied not only to electromagnetic relays.

〔Effect of the invention〕

Since the coil bobbin of the present invention is configured as described above,
Even if the collar of the coil bobbin where each terminal is provided does not have to extend outward in the axial direction, the external terminal pieces do not face each other, so a predetermined insulation distance between each terminal can be secured, saving space for the coil. The distance between the terminals can be secured without reducing the size, and as a result, the entire electrical device can be made smaller.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the parts and assembled state of an embodiment of the present invention; Fig. 2 is an exploded perspective view of an electromagnetic relay to which the invention is applied; Fig. 3 is a cross-sectional side view of the case. , Fig. 4 is a cross-sectional view taken along the line A-A, Fig. 5 is an exploded perspective view of an electromagnetic relay to which an electromagnet using a conventional coil bobbin is applied, Fig. 6 is a side view of its case in section, and Fig. 7 is a cross-sectional view of the electromagnetic relay. The figure is a cross-sectional view taken along line B-B. 1-coil bobbin, 2-winding trunk, 3.4-flange, 3a,
3b One opposing piece, 5-coil, 6.7 One terminal, 6a, 7a One terminal processing piece, 6b, 7b
- External terminal piece, 6c, 7cm connection piece, 6d, 7a horizontal piece,
6e, 7e - vertical piece, 11 - electromagnet, 15 - contact device, 21 - case.

Claims (1)

[Claims] (1) A synthetic resin coil bobbin that is incorporated into electrical equipment and has a cylindrical winding drum for winding a coil, and flanges connected to both ends of the winding drum. In an electromagnetic coil bobbin in which two terminals that are connected and exposed to the outside of the electric device are provided on one of the flanges, the two terminals are connected to a terminal processing piece that connects the coil end and exposed to the outside. The external terminal piece and the connecting piece that connects them and is provided on the flange are integrally formed, and the external terminal piece of at least one terminal is non-contacted so that the external terminal pieces do not face each other when the connecting pieces are opposed. An electromagnetic coil bobbin formed in a straight line.