JPH05166448A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To perform sure action by restricting motion in a direction, except the motion of an armature attracted or separated, to a position approximate to a side wall of the armature of a coil bobbin by an armature moving restricting part, so that a movable contact is brought into proper contact with a fixed contact. CONSTITUTION:In a relay 1, an armature motion restricting part 6f1 provided in a coil bobbin 6 is adjacently arranged relating to a side wall 11a of an armature 11, and further an armature motion restricting part 4b1 provided in a case 4 is adjacently arranged relating to a ceiling wall 11c of the armature 11. In this way, the armature 11 can not be moved in three directions except a normal moving direction of the armature 11. Accordingly, even when a drop shock is applied to an electromagnetic relay 1, deformation of a movable contact piece of the armature 11 is prevented by the restricting parts 6f1, 4a1, 4b1, and a deviation of the armature in an attraction or separation moving direction relating to a coil iron core 5 is prevented from being generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay which excites an electromagnetic coil to switch a movable contact connected to an armature to connect or disconnect a circuit.

[0002]

2. Description of the Related Art As an electromagnetic relay for switching a movable contact connected to an armature by energizing an electromagnetic coil to connect or disconnect a circuit, for example, Japanese Patent Laid-Open No. 63-252.
The one described in Japanese Patent No. 333 is known.

In the electromagnetic relay described in the above publication, an iron core is provided along the base surface, and the winding coil wound around the bobbin arranged outside the iron core is energized. , The armature is sucked and moved along the base surface toward the iron core. The movable contact connected to the armature via the movable contact piece comes into contact with the fixed contact fixed to the base, whereby the circuit connected to the fixed contact is switched from the cut-off state to the conductive state.

[0004]

However, in the above-mentioned conventional electromagnetic relay, if a large impact is applied when it is dropped, for example, the armature may move in a direction opposite to the suction moving direction. As a result, when the movable contact piece connected to the armature is deformed, the movable contact is displaced from the fixed contact. Then, the movable contact may not be surely brought into contact with the fixed contact, or the operating voltage may fluctuate, in which case there is a problem that the operation becomes defective.

An object of the present invention is to provide an electromagnetic relay in which a movable contact piece or the like is not easily deformed even when a large impact is applied.

[0006]

In order to achieve the above-mentioned object, in the present invention, an armature movement regulation for regulating movement of the armature in the vicinity of the armature in a direction other than the suction movement or the separation movement. The movable contact piece is prevented from being deformed by the structure provided with the portion.

[0007]

In the electromagnetic relay according to the present invention, when an impact is applied to the electromagnetic relay, the armature movement restricting portion restricts the movement of the armature in a direction other than the direction in which the armature is moved by suction or separated.

Therefore, even if a shock is applied to the electromagnetic relay, the movable contact piece attached to the armature is less likely to be deformed, and the movable contact is always positively contacted with the fixed contact, and therefore the operation is performed. The voltage does not fluctuate.

[0009]

1 to 18 show an embodiment of an electromagnetic relay according to the present invention.

The illustrated electromagnetic relay 1 is mainly composed of a coil body 2, a base body 3 and a case 4.

The coil body 2 includes a coil iron core 5, a coil bobbin 6, a frame 7, a coil portion 8, a coil terminal 9,
10, armature 11, movable contact piece 12, movable contact 13
And a movable contact terminal 14.

The coil bobbin 6 is shown in FIGS. 9, 10 and 11.
As is clear from the above, the flange 6 having a substantially disk shape
A tubular portion 6c forming the coil portion 8 is provided between a and 6b, and an iron core hole 6d for inserting the coil iron core 5 is provided at the center of the flanges 6a and 6b. Then, the coil portion 8 is provided by winding a copper wire around the tubular portion 6c, and as shown in FIG. 10, the axial coil iron core 5 is inserted and arranged in the iron core hole 6d.

Further, legs 6e and 6f, which have a substantially rectangular shape and project toward the right side and the left side in FIG. 10, are provided on the outer circumferences of the flanges 6a and 6b.
Terminal mounting portions 6g and 6h for mounting the coil terminals 9 and 10 are formed on 6f. One of the legs 6e, 6f is provided with an armature movement restricting portion 6f1 formed flat along the side wall 11a at a position slightly separated from the side wall 11a of the armature 11 on the upper surface of the leg 6e. There is.

The terminal mounting portions 6g and 6h are shown in FIG.
Upper edge 6 of terminal mounting part 6g, 6h in 1
From g1, 6h1 toward the lower edges 6g2, 6h2, FIG.
Notches 6g3 and 6h3 for terminal support which are formed as grooves having an L-shaped cross section when viewed from the front side inside are provided. Terminal support notch 6g3, 6h3 upper edge 6g
1, 6h1 are open, and the terminal support notch 6
Square holes 6g4, 6h4 (shown in FIG. 12) smaller than the size of the opening of the terminal supporting notch 6g3, 6h3 are formed on the lower edge 6g2, 6h2 side of g3, 6h3 up to the lower edge 6g2, 6h2. There is.

Further, the notches 6g3 and 6h for supporting the terminal
As shown in FIG. 11, the lower side of FIG. 3 of FIG.
6h5 is formed.

Then, the terminal mounting portions 6g, 6
Coil terminals 9 and 10 are attached to h.
As is apparent from FIGS. 9, 10, 11, and 12, the coil terminals 9 and 10 have a flat outer connection portion 9
a and 10a, and bobbin insertion portions 9b and 10b bent at a right angle at their upper ends. Bobbin insertion part 9
b and 10b, along the external connection portions 9a and 10a, and in the central portion of the insertion portion main bodies 9b1 and 10b1 that are molded into an outer shape that can be inserted into the terminal supporting notches 6g3 and 6h3 of the coil bobbin 6 Resistor pressing pieces 9b2, 10 protruding slightly downward in 9
b2 is provided. And the resistor holding piece 9b
2, 10b2 and the external connection portions 9a, 10a, the resistor fixing grooves 9b3, 10b3 having an opening dimension substantially equal to the outer diameter dimension of the lead portions 30a, 30b included in the resistor 30.
Are formed.

Further, as shown in FIGS. 11 and 12, the barb portion 9b to which the ends of the wire of the coil 8 are connected to the insertion portion main bodies 9b1 and 10b1 of the coil terminals 9 and 10, respectively.
4, 10b4 are formed so as to project in an axial shape, and these barbed portions 9b4, 10b4 are the terminal mounting portions 6g, 6
It is inserted and arranged in the square holes 6g4 and 6h4 of h.

Here, from the flared portions 9b4, 10b4 side of the coil terminals 9, 10 the insertion portion main bodies 9b1, 10b.
1 is a notch for supporting the terminal of the coil bobbin 6g3,6
Insert in h3. The barbs 9b4 and 10b4 are square holes 6
g4, 6h4 is inserted and protruded to the outside, and therefore the external connection portions 9a, 1 of the coil terminals 9, 10 are
0a and the resistor pressing pieces 9b2, 10b2 project downward from the terminal withdrawing openings 6g5, 6h5 toward the lower side in FIG. 9, the insertion portion main bodies 9b1, 10b1 are attached to the terminal mounting portions 6g, 6h of the coil bobbin 6. Supported. Then, after the lead wires 8a and 8b drawn from the coil portion 8 are pulled out from the bending portions 9b4 and 10b4 protruding from the square holes 6g4 and 6h4, respectively, soldering is performed and the coil portion 8 is coiled. Terminals 9 and 10
Connected to. And again, the barbed portions 9b4, 10b4
After the lead wires 8a and 8b are stripped from each, soldering is performed. Insertion body 9b1, 10 by soldering
The b1 serves as a retainer for the terminal supporting notches 6g3 and 6h3, and the coil terminals 9 and 10 are not easily detached from the coil bobbin 6.

Coil iron core 5 inserted into coil bobbin 6
A frame 7 is attached to the tip of the. Frame 7
Is made of a conductive magnetic material,
As is clear from FIGS. 3, 4, and 14, the armature side frame 7a having a rectangular shape and the coil core side bent from the right end of the armature side frame 7a toward the rear side in FIG. It consists of a frame body 7c with a frame 7b. At the lower ends of the armature side frame 7a and the coil core side frame 7b of the frame body 7c, a press-fitting convex portion 7a for press-fitting to the base body 3 side.
1, 7b1 are provided. A movable contact terminal 14 having an external connection portion 14a protruding downward is fixed to a lower end of the armature side frame 7a at a substantially central portion thereof.

The tip end side of the coil core 5 is fixed by caulking at a substantially central position of the coil iron core side frame 7b, and the base end 12a of the movable contact piece 12 is riveted at a substantially central position of the armature side frame 7a. It is fixed.

The movable contact piece 12 is formed by bending an elastic body having conductivity into a substantially L shape, and the base end is fixed to the armature side frame 7a.
2a, and the tip protruding from the end of the armature side frame 7a toward the base end side of the coil core 5 is the movable part 12b. The fixed portion 12a is fixed to the substantially center of the armature side frame 7a by rivets, and the armature 11 made of a magnetic material is fixed to the movable portion 12b by rivets. A movable contact 13 is attached to the tip of the movable portion 12b. The movable portion 12b urges the armature 11 and the movable contact 13 in a direction away from the base end side of the coil core 5 in a state where the armature 11 is in contact with the end portion of the armature side frame 7a.

On the other hand, the base body 3 includes a base body 16 and
It is composed of a resistor 30 and fixed contact terminals 19 and 20 provided with fixed contacts 17 and 18.

As is clear from FIGS. 5, 6 and 17, the base body 16 has a rectangular cylindrical case assembly portion 16b projecting upward from the fixed wall 16a formed at the center in the figure. And a rectangular cylindrical external assembly portion 16c is provided in a protruding state on the lower side of the fixed wall 16a in the figure.

5, fixed contact terminal holes 16a1 and 16a2 (shown in FIG. 17) are provided on the rear side of the fixed wall 16a in FIG. 5, and these fixed contact terminal holes 16a1 and 16a2 are provided with fixed contacts. The external connection portions 19a and 20a of the terminals 19 and 20 are fixed by being press-fitted, and the fixed contact attachment portions 19b and 20b provided at the tips of the fixed contact terminals 19 and 20 are fixed at positions with a predetermined separation dimension. It projects toward the upper side of the wall 16a in the figure. The fixed contact mounting portion 19
Fixed contacts 17 and 18 are attached to opposite sides of b and 20b.

As shown in FIGS. 17 and 18, both ends of the fixed wall 16a on the side of the case assembling portion 16b are formed in a rectangular shape downward from the fixed wall 16a in the figure to form the frame 7. Frame supporting portions 16d and 16e are provided for supporting the press-fitting convex portions 7a1 and 7b1 in a fitted state. The external connection portions 9a, 10a, 14a are inserted through substantially the center of the fixed wall 16a at positions corresponding to the external connection portions 9a, 10a, 14a provided in the coil terminals 9, 10 and the movable contact terminal 14 of the coil body 2. Coil terminal holes 16a3, 16a4 for
And movable contact terminal hole 16a5 (shown in FIG. 17).
Is provided.

The fixed wall 16a is provided on the side of the coil terminal holes 16a3 and 16a4 of the fixed wall 16a.
The resistor support groove 16a6 formed in a concave shape from the upper surface of the coil terminal toward the lower side in the drawing is the coil terminal hole 16a3,1.
It is provided in a state of being connected to 6a4. A resistor 30 for absorbing a surge voltage when the coil portion 8 is excited is housed in the resistor support groove 16a6, and as shown in FIG. 18, the lead portion 30a provided in the resistor 30 is 30b is the coil terminal hole 16a3,
16a4.

Further, the coil terminal holes 16a3,1
A taper wall formed at a position of 6a4 close to the lead portions 30a, 30b such that the size of the opening portions of the coil terminal holes 16a3, 16a4 becomes smaller from the upper side to the lower side in FIG. 16a7,
16a8 is provided.

Here, the coil terminal holes 16a3,
External connection portions 9a, 10a, 14a provided on the coil terminals 9 and 10 of the coil body 2 and the movable contact terminal 14 with respect to 16a4 and the movable contact terminal hole 16a5.
6 is inserted from the upper side to the lower side in FIG. 6, and the resistor fixing groove 9b is provided between the external connecting portions 9a, 10a of the coil terminals 9, 10 and the resistor pressing pieces 9b2, 10b2.
3, 10b3 sandwiches the lead portions 30a, 30b of the resistor 30, and the resistor pressing pieces 9b2, 10b2 slidably contact the tapered walls 16a7, 16a8 to form the resistor pressing piece 9b.
2, 10b2 are bent toward the external connection portions 9a, 10a so that the lead portions 30 are provided in the resistor fixing grooves 9b3, 10b3.
Coil terminals 9 and 10 for sandwiching a and 30b
The resistor 30 is connected to the coil terminals 9 and 10 only by inserting the movable contact terminal 14 into the fixed wall 16a.

On the other hand, as is apparent from FIGS. 7 and 8, the case 4 has a rectangular top wall 4a and a rectangular tubular side wall 4b protruding downward in the drawing. The base assembly portion 4b2 provided at the lower end of the side wall 4b is the case assembly portion 1 of the base body 16.
The case 4 is assembled to the base body 16 by being fitted to the base plate 6b.

At a part of the top wall 4a near the left end in FIG. 7, there is provided a first case side armature movement restricting portion 4a1 formed in a flat shape and lowered one step along the top wall 4a. It is provided. As is clear from FIG. 2, the first case side armature movement restricting portion 4a1 is slightly separated from the side wall 11b of the armature 11 toward the upper side in the figure.

Further, in a part of the side wall 4b, in the vicinity of the first case side armature movement restricting portion 4a1, at a position separated from the left side wall 4b in FIG. 7 to the left side in the drawing. A second case-side armature movement restricting portion 4b1 which is formed flat along the side wall 4b is provided. This second case side armature movement restricting portion 4
As is clear from FIG. 2, b1 is a top wall 11c provided on the armature 11 in a state of being assembled to the base body 3.
And a movable part 12b of the movable contact piece 12, which are slightly separated from each other. As shown in FIG. 8, the first case-side armature movement restricting portion 4a1 and the second case-side armature movement restricting portion 4b1 are The ribs integrally project toward the inside of the side wall 4b at approximately the center of the side wall 4b.

Such an electromagnetic relay 1 is shown in FIGS.
3, the assembly is performed by the procedure shown in FIG. 14, FIG. 15, FIG. 16, FIG. 17, and FIG.

In FIG. 12, the coil terminals 9 and 10 are assembled to the terminal supporting notches 6g3 and 6h3 provided in the terminal mounting portions 6g and 6h of the coil bobbin 6, and as shown in FIG. 10 external connection portions 9a, 10a and barbed portions 9b4,
10b4 is projected from the legs 6e and 6f of the coil bobbin 6.

Then, the coil portion 8 is wound around the groove 6c of the coil bobbin 6 in which the coil terminals 7 and 10 are assembled.

Then, as shown in FIG. 14, a frame 7 is attached to the coil bobbin 6 having the coil terminals 9 and 10 assembled therein.
And assemble the coil core 5. As shown in FIG. 15, by fixing the movable contact piece 12 having the armature 11 fixed and the movable contact terminal 14 to the coil bobbin 6 in which the coil terminals 9 and 10, the frame 7 and the coil core 5 are assembled, as shown in FIG. The coil body 2 is assembled.

On the other hand, as shown in FIG. 17, the base body 1
6, the resistor 30 is inserted into the resistor support groove 16a6 provided in the fixed wall 16a of the resistor 6, and the lead portions 30a, 3
0b is a hole 16a3 for the coil terminal of the fixed wall 16a,
16a4, fixed contact terminal 19,
20 to the fixed contact terminal hole 16a of the fixed wall 16a
The base body 3 shown in FIG. 18 is assembled by press-fitting and fixing to 1, 16a2.

Next, as shown in FIG. 18, the coil body 2
The external connection portions 9a and 10a of the coil terminals 9 and 10 protruding from the coil bobbin 6 and the external connection portion 14a provided on the tip side of the movable contact terminal 14 are connected to the coil terminal holes 16a3 and 16a4 of the base body 16 and the movable contact. While inserting into the terminal hole 16a5, the movable contact 13 provided on the movable contact piece 12 of the coil body 2 is inserted between the fixed contacts 17 and 18 of the base body 3, and further, the frame support portion of the fixed wall 16a. The press-fitting convex portions 7a1 and 7b1 of the frame 7 are press-fitted into the coil bodies 2 and 16d.
An assembly of the base body 3 and the base body 3 is obtained.

Then, the assembly is completed by fitting the base assembly portion 4b2 of the case 4 into the case side assembly portion 16b provided in the base body 16 of the base body 3.

The electromagnetic relay 1 having such a structure is used as follows. Switching means (not shown) is connected to the external connection portions 9a and 10a of the coil terminals 9 and 10, and the external connection portion 14a of the movable contact terminal 14 and the external connection portions 19a and 2 of the fixed contact terminals 19 and 20 are connected.
A circuit (not shown) for switching to 0a is connected. Since the movable contact 13 is in contact with the fixed contact 17 on one side by the elastic repulsive force of the movable contact piece 12, the movable contact terminal 14 is in a conducting state with the fixed contact terminal 19, and from this state, the switching is performed. When the circuit is turned on and the coil terminals 9 and 10 are energized, the resistor 30 is energized through the coil terminals 9 and 10, and the coil portion 8 is supplied with power and the coil portion 8 is excited. It

When the coil portion 8 is excited, a magnetic flux passing through the coil core 5, the frame 7 and the armature 11 is generated, and the armature 11 is attracted and moved toward the coil core 5.

By moving the armature 11 toward the coil core 5 side by suction, the movable contact piece 12 is also moved to the armature 1.
1 moves to the coil core 5 side integrally with the movable contact piece 1
Since the movable contact 13 attached to 2 is separated from the fixed contact 17 and contacts the fixed contact 18, the movable contact terminal 14 and the fixed contact terminal 20 on the other side are connected, and the circuit can be switched.

In this electromagnetic relay 1, the coil bobbin side armature movement restricting portion 6f1 provided on the coil bobbin 6 is arranged close to the side wall 11a of the armature 11, and the other side wall 11 of the armature 11 is arranged.
b, the first case-side armature movement restricting portion 4a1 provided in the case 4 is disposed in proximity to the b, and the second case-side armature movement provided in the case 4 with respect to the top wall 11c of the armature 11 is further moved. Since the restricting portions 4b1 are arranged close to each other, the armature 11 cannot move in three directions except the normal moving direction of the armature 11. Therefore, even if a drop impact is applied to the electromagnetic relay 1, the deformation of the movable contact piece of the armature 11 is prevented by the restricting portions 6f1, 4a1, 4b1, and the armature 11 is displaced in the suction movement direction or the separation movement direction with respect to the coil core 5. Does not occur.

[0043]

As described above, since the electromagnetic relay according to the present invention has the above-mentioned structure, the armature movement restricting portion restricts the movement of the armature in the directions other than the suction movement direction or the separation movement direction. In order to ensure accurate movement of the armature with respect to the coil iron core, even if a shock is applied to the electromagnetic relay, the movable contact mounted on the armature will not be deformed, thereby fixing the movable contact. Since the contact can be accurately brought into contact with the contact, it has an excellent effect that a reliable operation can be performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment of an electromagnetic relay according to the present invention.

FIG. 2 is a partial vertical sectional front view around an armature in the electromagnetic relay shown in FIG.

3 is a front view of a coil portion in the electromagnetic relay shown in FIG.

FIG. 4 is a plan view of the coil unit shown in FIG.

5 is a vertical sectional front view of a base body in the electromagnetic relay shown in FIG.

6 is a vertical cross-sectional side view of the base body shown in FIG.

7 is a vertical sectional front view of a case in the electromagnetic relay shown in FIG.

8 is a vertical sectional side view of the case shown in FIG.

9 is a front view of a coil bobbin in the electromagnetic relay shown in FIG.

10 is a side view of the coil bobbin shown in FIG. 9. FIG.

11 is a bottom view of the coil bobbin shown in FIG.

FIG. 12 is an external perspective view illustrating an assembly procedure in the electromagnetic relay illustrated in FIG. 1.

13A and 13B are perspective views showing the outer appearance of the electromagnetic relay shown in FIG.

FIG. 14 is a perspective view of the appearance of the electromagnetic relay shown in FIG.

FIG. 15 is an external perspective view illustrating an assembly procedure in the electromagnetic relay illustrated in FIG. 1.

FIG. 16 is an external perspective view for explaining an assembly procedure in the electromagnetic relay shown in FIG.

FIG. 17 is a perspective view showing the appearance of the electromagnetic relay shown in FIG.

FIG. 18 is an external perspective view illustrating an assembly procedure in the electromagnetic relay illustrated in FIG. 1.

[Explanation of symbols]

1 electromagnetic relay 2 coil body 3 base body 4 case 4a1, 4b1 (armature movement regulation part) case side armature movement regulation part 5 coil iron core 6 coil bobbin 6f1 (armature movement regulation part) coil bobbin side armature movement regulation part 7 frame 8 coil part 9 , 10 Coil terminal 11 Armature 12 Moving contact piece 13 Moving contact 14 Moving contact terminal 17,18 Fixed contact 19,20 Fixed contact terminal 30 Resistor

Claims (1)

[Claims] 1. A coil bobbin in which a coil iron core is inserted through the center, a frame in which the coil iron core of the coil bobbin is assembled, a coil portion provided in the coil bobbin, and a coil bobbin assembled in the coil bobbin. A coil terminal to which the end of the winding coil of the part is connected, and an armature that is attracted to or moved away from the coil core by the magnetic flux generated by the current that is applied to or cut off from the coil through the coil terminal, A movable contact piece fixed to the frame and having the armature attached thereto, and a movable contact provided on the movable contact piece,
A coil body having a movable contact terminal connected to the movable contact, a fixed contact terminal provided with a fixed contact arranged facing the movable contact of the movable contact piece of the armature, and a fixed contact terminal of the coil portion. An electromagnetic relay having a resistor connected to an end, the base body on which the coil body is mounted, and a case that covers the coil body and is assembled to the base body, wherein the coil bobbin includes: An electromagnetic relay, wherein an armature movement restricting portion that restricts movement of the armature in a direction other than a suction movement or a separation movement is provided at a position near a side wall of the armature.