JPS5931537A - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic relay, and particularly to a small electromagnetic relay mounted on a printed circuit board or the like.

In general, this type of electromagnetic relay must be able to obtain a certain electromagnetic attraction force despite its small size, and a sufficient insulation distance must be maintained between its coil terminal and contact terminal. It is desired that the system be configured as follows.

Figures 1 and 1B show examples of conventional electromagnetic relays of this kind, where l is an electromagnetic filter wound around the winding frame 2C of the coil bobbin λ, and is inserted into the center hole of the bobbin. The iron core 3 is inserted through the iron core 3, and a magnetic field is formed between the iron core 3, the yoke and the movable iron piece that are connected to the iron core 3, and the movable iron piece.

Furthermore, the movable iron piece J is attached to the movable piece 6A, which is bent at a nearly right angle, and the plate holder fixed to the yoke is attached to the movable piece 6A. Movable contacts 7A and 7B are provided on the upper and lower surfaces of the extended end. tA and fB are fixed contacts provided at positions facing %j to the movable contacts 7A and 7B, respectively. Fixed contact terminal plates 9 and /θ on which several contacts rh and fB are arranged are grooves //A and I/B provided in the lower flange 2A of the coil bobbin λ shown in FIG. 1(B). and,
It is fitted and fixed between the upper flange of the coil bobbin and a fixing pedestal (not shown) provided on the coil bobbin 2B.
θA is made to protrude downward from the case/2 as shown in FIG. 1 (5).

/3 OJ: U #kJ: Film terminal board,
These coil terminal plates /3 and /da are the lead wire connections at the start and end of winding of the coil l /J A and # A are from the lower part of the coil /
The external connection terminal parts /JR and /B of the coil terminal plates /3 and /L installed in this way are made to protrude downward from the case /2. . Incidentally, tB is an external connection terminal portion provided by extending the lower end of the leaf spring B downwardly from the case/2.

Next, the operation of the electromagnetic relay configured as described above will be explained.

FIG. 1 (4) shows the demagnetized state of the electromagnetic coil l. In such a demagnetized state, the movable iron piece j is separated from the iron core 3 by the spring force of the plate spring t, and the movable contact 7A is connected to the contact terminal. It is in contact with the fixed contact rh of the plate 9. When the electromagnetic coil 1 is energized, the movable iron piece S is attracted to the iron core 3, and the movable piece 6A is also attracted against its own spring force, and its contact point 7A is moved to the contact point A. Open from! 't
'f L, contact point 7B contacts contact point B instead. That is, in this way, is the magnetic coil energized or extinguished? Relay operation can be performed by setting the value to 1μ.

However, the conventional electric M
The l m '+l rabbit device had the following drawbacks.

/) Coil wire 1, 11i-f- board /3 and /g lead wire connection part /3 A and /l A are configured to protrude from the lower flange of bobbin 2, 2A to the coil / side. Therefore, these coil terminal boards /3 and /g can only be taken by the two members of the collar section after finishing the wire cutting of coil l, and moreover, terminal boards /3. / Gu no Torii”
When doing this, great care and careful work is required to avoid damaging the finished coil/winding, which is labor-intensive and increases costs.

2) The lead wire connection part protruding from the coil winding space or the coil side. Since magnetic attraction cannot be obtained, it is necessary to make delicate adjustments to the contact pressure between contacts 7A and lrA or contacts 7B and J'B, the gap between these contacts, and the contact operation, which takes time and increases costs. .

3) As mentioned above, the winding space must be secured to the minimum possible extent due to the limited external dimensions, and for this reason, the connection terminal section /,? B, /G B and connection terminal part?
A. Since the distance between the IOA and the IOA is limited, and it becomes impossible to obtain sufficient insulation distance between the lands that connect these coil terminals and contact terminals on the printed circuit board, this small German relay The scope of application is limited.

By the way, the pitch (spacing) between the coil terminal and contact terminal
is λ. jrnrn is an integral multiple of 2°jtImm.

An object of the present invention is to eliminate the above-mentioned drawbacks, to maintain a sufficient insulation distance of 1lili between the coil terminal and the contact terminal, to facilitate the fixing of the coil terminal, and to provide a wide coil winding space. The purpose of the present invention is to provide a small magnetic relay that is highly reliable, requires no effort, and can be obtained at a low price.

In other words, the present invention provides an upper flange portion and a lower flange i′ of a fill bobbin.
In an electromagnetic relay that has an electromagnetic coil wound around the winding frame between τb and a coil terminal plate with the end (+Nt) for attaching the lead wire of the winding of the electromagnetic coil, the lower flange of the coil bobbin A fixed T; l' separated from the winding frame part;
The coil terminal plate is fixed in the fixing groove, and the lead wire attachment part is made to protrude outwardly from the side of the lower flange part.

The present invention will be described in detail below based on the drawings.

fI+- Figures (4), ■) and (C) show an embodiment of the present invention.1 Here, n and 21 are coil terminal plates, B and b are terminal plates provided on the two downward parts of the bobbinco. A few phrases are grooves and coil terminal plates n and 2! ! Press-fit the lead wire winding parts 23A and 2-g A into the grooves B and 2 from the right side of the figure so that they protrude laterally from the lower flange 2A, and External] Form the y-connection terminal portions 2JB and 2GB so that they protrude from the case/2 to the lower blade.

2JC and FC are ytB and ! of terminal plate n and λg. This is the tooth pattern engraved on the part pushed into B, and these tooth patterns 2? C and λ<tC into the lower flange 2A,
tl allows the terminal plates n and 2g to be engaged with the bobbin 2. The sword shown in Figure 1 (C) is a guide man in which one lead wire is guided to the winding guide A.

In the electromagnetic relay constructed in this way, the coil terminal board and the two wires are connected to the lead wire winding tower portions 27A and 2.
Nothing, including pAe, protrudes from the lower flange 2A toward the coil/side.
Winding work can be done by attaching the terminal board /3 and /'l as in the past, and there is no danger of coil /3a (W). The work of applying layers to the winding portions 23A and 2IIA can be performed extremely easily, and winding by a machine is also possible.

Furthermore, by adopting a structure in which there is no protrusion toward the coil/side of the terminal plates 23A, 2&A, the fill winding space can be reduced to Il'7;
This allows sufficient electromagnetic attraction to be obtained.

History, Coil I: 'h: Child, 1? and the outside of the knob
11 approach, ・: 5 terminal section, 7? B and 2 13 in Fig. 2 (A
) and (J3) number: 1° to the left, i.e. fill/
Since it can be placed in the position below the coil store, the terminal part 2JA and 24' of the coil store and knob
A) The four-point terminal board connection terminal section A and IOA can be constructed so that the distance between them is widened, and there is sufficient insulation f'+ between the corresponding rads on the printed circuit board! 6 can be maintained.

As explained above, according to the present invention, the coil terminal plate does not protrude from the lower flange of the bobbin strip toward the coil side.
In addition, since these lead wire winding tower parts are configured to protrude to the side of the lower collar part, there is no need to attach the coil terminal plate after the coil winding work, and therefore there is no risk of the coil being damaged at that time. In addition, it is possible to mechanize the lead-out and wire-attaching work, resulting in good workability and cost reduction.Furthermore, the coil winding space can be widened and the anchorage can be secured, so it is sufficient. ．． c %, electromagnetic attraction force is obtained, and there is no need for delicate m14 adjustment as in the conventional method1
0 Furthermore, since the outer 6iS connection terminal part of the fill terminal can be set regardless of the position of the coil, it is possible to increase the distance between the contact terminal board and the external connection terminal part, and it is possible to set it on the printed circuit board. Sufficient payment j'lj fi, tf
, can be held, thereby expanding the scope of application of this bowl's small 71L value joint T.

[Brief explanation of the drawing]

Figures 1 and (B) are a sectional view showing an example of the configuration of a conventional small electromagnetic relay, a bottom view of the main body taken out of the case and seen from A-A61, and Figures 2 (4) and (I3). 1(C) is a cross-sectional view showing an example of the structure of the electromagnetic coupling ViL device of the present invention, and a bottom view including a partial cross-section of the main body taken out from the case and viewed from line B-B. It is a sectional view taken along the line C-C of a). 173-7...Electromagnetic coil, No...Coil hobbin 1. 2A, 2B... tsuba sound, 2C... winding frame f' city, 3...6ri (heart, q...!jijl shio, S...youi dill ri person piece, bu... ... Plate, Otsu A ... ixJ Lily month, 4B... Contact 1 bar, , 7A child part, 7A, 7B... Movable contact, JA, , rIl... Fixed contact, wa, /θ...Fixed contact terminal board, qA, 9B...External connection terminal!'St'l, //A
, //B ・-rl'r4 , /2...Case, 13,/G...Coil terminal board -13A, /qA...Output wire connection NIS %/3B,
#B...Outside (% connection 5τ1.1 child part, 2324'...
・Coil terminal board, 2FA, 2! A... Lead wire winding tower section, 23B, 2
LIB...external connection terminal section, 3C92VC...teeth
Type, Noj, Nootsu, 27...n~. Patent applicant: Fuji Electric Manufacturing Co., Ltd. Figure 1 (A) (B)

Claims (1)

[Claims] An electromagnetic relay having an electromagnetic coil wound around a winding frame between an upper flange and a lower flange of a coil bobbin, and a coil terminal plate having an end for attaching a lead wire of the electromagnetic coil. A fixing groove isolated from the winding frame is provided in the lower flange of the coil bobbin, the coil terminal plate is fixed in the fixing groove, and the lead wire attachment section is directed outward from the side of the lower flange. An electromagnetic relay characterized in that it protrudes toward the target.