JPH04218228A - Electromagnetic relay and assembling method thereof - Google Patents

Abstract

PURPOSE:To thin the wall thickness of a flange to enlarge a coil winding space by fittedly inserting each L-shape plate spring for make/break contact into each of square holes provided in the flange and a substrate of a coil bobbin. CONSTITUTION:A make-side fixed contact spring 7 is formed of a plate spring 71 having the projection 75 of an L-shape long shaft and the fixed contact 3 sticked to the external face at the side of a short shaft 72. Moreover, a break- side fixed contact spring 2 is formed of the L-shape plate spring 21 and the contact 3 sticked to the internal face at the side of a short-shaft 22. The projection 75 and the long shaft 23 are fittedly inserted into the square holes 84, 85 made in one flange 81, and the long shaft 23 and the long shaft 73 are fittedly inserted into the square hole 86 provided in the other flange 82. Next, the terminal portions 24, 74 of the springs 21, 71 are fittedly inserted into the square holes 91 of a substrate 9 and a coil bobbin 8 is stuck to the substrate 9 together with an iron core, so that a spring 7 is interposed between the flange 81 and the substrate 9. It is thereby possible to thin the flange 81 and enlarge the coil winding space.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay in which a fixed contact spring is embedded in a flange of a coil bobbin.

[0002] In recent years, electromagnetic relays installed in automobiles and the like are required to switch and close large-capacity loads and to carry on continuous current, and as a means to meet this demand, the cross-sectional area of movable contact springs that open and close contacts has been increased. However, if the cross-sectional area of the movable contact spring is increased, the driving force must be strengthened, and the coil winding space of the coil bobbin must be expanded as much as possible.

0003

2 and 3 are perspective views showing the main parts of a conventional electromagnetic relay. In FIG. 2, the conventional electromagnetic relay includes a leaf spring 11 bent into an L shape, and a leaf spring 11 bent into an L-shape.
A make side fixed contact spring 1 consisting of a fixed contact 3 fixed to the outer surface of the short axis 12 side of
, a break side fixed contact spring 2 consisting of a fixed contact 3 fixed to the inner surface of the short axis 22 side of the leaf spring 21, and a coil bobbin 4 having a coil 43 wound between flanges 41 and 42. .

[0004] The flange 41 of the coil bobbin 4 is a leaf spring 1
The flange 41 has a square hole 44 into which the long axis side 13 of the leaf spring 21 is press-fitted, and a square hole 45 into which the long axis 23 side of the leaf spring 21 is press-fitted. In order to make the width wider, the short axis 12 side of the leaf spring 11 is the leaf spring 2.
It is configured to extend from a position lower than the short axis 22 side of 1 toward the center. The flange 42 also has a square hole 46 into which the long axis 13 side of the leaf spring 11 and the long axis 23 side of the leaf spring 21 are inserted.

After the long axis 13 side of the make side fixed contact spring 1 is press-fitted into the square hole 44 and the square hole 46, the long axis 23 side of the break side fixed contact spring 2 is press-fitted into the square hole 45. The fixed contact 3 is fixed to the outer surface of the make side fixed contact spring 1 on the short shaft 12 side by fitting into the square hole 46, and the fixed contact 3 is fixed to the inner surface of the break side fixed contact spring 2 on the short shaft 22 side. are opposed to each other in the middle of the square holes 44 and 45 provided in the flange 41.

In FIG. 3, another conventional electromagnetic relay includes a leaf spring 11 bent into an L shape, and a short axis 1 of the leaf spring 11.
The make side fixed contact spring 1 consists of a fixed contact 3 fixed to the outer surface of the second side, a leaf spring 21 bent into an L shape, and a fixed contact 3 fixed to the inner surface of the short shaft 22 side of the leaf spring 21. It includes a break-side fixed contact spring 2 and a coil bobbin 6 in which a coil 43 is wound between flanges 61 and 62.

The flange 61 of the coil bobbin 6 is connected to the leaf spring 1.
1 on the short shaft 12 side and a convex hole 6 into which the fixed contact 3 is inserted.
4, and a convex hole 65 into which the short shaft 22 side of the leaf spring 21 and the fixed contact 3 are inserted is open on the side surface, and the flange 62
are the long axis 13 side of the leaf spring 11 and the long axis 23 of the leaf spring 21.
It has a notch 66 into which the side is inserted.

By fitting the short shaft 12 side of the make side fixed contact spring 1 into the convex hole 64 of the flange 61 and fitting the short shaft 22 side of the break side fixed contact spring 2 into the convex hole 65. , the fixed contact 3 fixed to the outer surface of the make-side fixed contact spring 1 on the short shaft 12 side, and the fixed contact 3 fixed to the inner surface of the break-side fixed contact spring 2 on the short shaft 22 side are attached to the flange 61.
The convex holes 64 and 65 are opposed to each other in the middle.

[0009]

However, the height of an electromagnetic relay is generally limited, and so is the height of the coil bobbin. In the case of the conventional electromagnetic relay shown in FIG. 2, square holes 44 and 4 are
5, it is necessary to provide sufficient press-fitting margin for the flange 41, which becomes thicker and the space for winding the coil 43 of the coil bobbin 4 becomes smaller.

Further, in the conventional electromagnetic relay shown in FIG. 3, the thickness of the flange 61 having the convex holes 64 and 65 is as follows.
The distance between the short axis 12 side of the make side fixed contact spring 1 and the short axis 22 side of the break side fixed contact spring 2, the plate thickness of the short axis 12 side and the short axis 22 side, and the short axis 12 side and the short axis. 22 side is required to be thicker than the flange 41 of the conventional electromagnetic relay shown in FIG.
There is a problem in that the space for winding the coil 43 becomes even smaller.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic relay in which the flange of the coil bobbin can be made thinner and the coil winding space can be expanded, and a method for assembling the same.

0012

[Means for Solving the Problems] FIG. 1 is a perspective view showing an electromagnetic relay according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above problem is solved in an electromagnetic relay in which at least one pair of L-shaped fixed contact springs is fitted into a square hole of a flange of a coil bobbin, and fixed contacts fixed to the short axis sides of the fixed contact springs face each other. , a leaf spring 71 bent into an L shape and having a projection 75 protruding in the direction of extension of the long axis 73, and a fixed contact 3 fixed to the outer surface of the leaf spring 71 on the short shaft 72 side. , a break-side fixed contact spring 2 consisting of a leaf spring 21 bent into an L-shape, and a fixed contact 3 fixed to the inner surface of the short shaft 22 side of the leaf spring 21;
square hole 85 into which the long axis 23 side of 1 is inserted, and the leaf spring 7
1 has a square hole 84 into which the protrusion 75 is inserted, and the other flange 82 has a long axis 23 side of the leaf spring 21 and a square hole 84 into which the projection 75 of the leaf spring 71 is inserted.
The present invention comprises a coil bobbin 8 having a square hole 86 into which the long axis 73 side of the coil bobbin 8 is inserted, and a substrate 9 having a square hole 91 into which the terminal portion 74 of the leaf spring 71 and the terminal portion 24 of the leaf spring 21 are inserted. This is achieved by electromagnetic relays.

[0014]

[Function] In FIG. 1, a make-side fixed contact spring consisting of a leaf spring bent into an L-shape and having a protrusion protruding in the direction of extension of the long axis, and a fixed contact fixed to the outer surface of the leaf spring on the short axis side; A coil bobbin has one flange having a square hole into which the protrusion of the leaf spring is inserted, the other flange has a square hole into which the long axis side of the leaf spring is inserted, and a square hole into which the terminal part of the leaf spring is inserted. The electromagnetic relay of the present invention, which includes a substrate, eliminates the need for a sufficient press-fitting margin and allows the flange of the coil bobbin to be made thinner.

That is, it is possible to realize an electromagnetic relay in which the flange of the coil bobbin can be made thinner and the coil winding space can be expanded, and a method for assembling the same.

[0016]

[Embodiment] An embodiment of the present invention will be explained in detail below with reference to FIG. In the figure, the electromagnetic relay according to the present invention has a protrusion 7 bent in an L shape and protruding in the direction of extension of the long axis 73.
5, a make-side fixed contact spring 7 consisting of a fixed contact 3 fixed to the outer surface of the short axis 72 side of the leaf spring 71, a leaf spring 21 bent into an L-shape, and a A break-side fixed contact spring 2 consisting of a fixed contact 3 fixed to the inner surface of the short shaft 22 side, a square hole 85 into which the long shaft 23 side of the leaf spring 21 is fitted into one flange 81, and a protrusion 75 of the leaf spring 71. The coil bobbin 8 has a square hole 84 into which the coil bobbin 8 is fitted, and a square hole 86 into which the long axis 23 side of the leaf spring 21 and the long axis 73 side of the leaf spring 71 are fitted in the other flange 82.

When inserting the make-side fixed contact spring 7 into the flange of the coil bobbin 8, first insert the long axis 73 side of the leaf spring 71 into the square hole 86 of the flange 82 of the coil bobbin 8, and then insert the leaf spring 71 into the square hole 86 of the flange 82 of the coil bobbin 8. The push-up protrusion 75 on the flange 81 is inserted into the square hole 84 that the flange 81 has. The leaf spring 71 of the make side fixed contact spring 7 has a notch 76 on the long axis 73 side, and the square hole 86 of the flange 82 into which the long axis 73 side is fitted allows the notch 76 to pass laterally. It has an opening 87. Therefore, it is extremely easy to fit the leaf spring 71 into the square hole 86 of the flange 82 on the long axis 73 side.

In the electromagnetic relay according to the present invention, the protrusion 75 of the leaf spring 71 is simply inserted into the square hole 84 of the flange 81, and the make side fixed contact spring 7 may fall off from the coil bobbin 8 due to impact during operation. However, since the board 9 has a square hole 91 into which the terminal portion 74 of the leaf spring 71 is inserted, and the coil bobbin 8 is fixed to the board 9 together with an iron core (not shown), it is not fixed on the make side. The contact spring 7 is held between the flange 81 and the substrate 9 and will not fall off.

[0019] A leaf spring bent into an L-shape as described above and having a protrusion protruding in the direction of extension of the long axis, and a make side fixed contact spring comprising a fixed contact fixed to the outer surface of the short axis side of the leaf spring; A coil bobbin having one flange having a square hole into which the protrusion of the leaf spring is inserted, the other flange having a square hole into which the long axis side of the leaf spring is inserted, and a square hole into which the terminal part of the leaf spring is inserted. The electromagnetic relay of the present invention, which includes a substrate, eliminates the need to provide sufficient press-fitting margin, and the flange of the coil bobbin can be made thinner.

Note that the leaf spring 21 is bent into an L shape, and the fixed contact 3 is fixed to the inner surface of the leaf spring 21 on the short shaft 22 side.
In the break-side fixed contact spring 2, the long axis 23 side of the leaf spring 21 is press-fitted into a square hole 85 of a flange 81, and is also fitted into a square hole 86 of a flange 82. Although the flange 81 is made thinner and does not have enough room for press-fitting into the make-side fixed contact spring 7, it has enough room for press-fitting into the break-side fixed contact spring 2. The fixed contact spring will not fall off.

[0021]

As described above, according to the present invention, it is possible to provide an electromagnetic relay in which the flange of the coil bobbin can be made thinner and the coil winding space can be expanded, and a method for assembling the same.

[Brief explanation of the drawing]

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

FIG. 2 is a perspective view showing the main parts of a conventional electromagnetic relay.

FIG. 3 is a perspective view showing the main parts of a conventional electromagnetic relay.

[Explanation of symbols]

2 Break side fixed contact spring
3 Fixed contact 7 Make side fixed contact spring
8 Coil bobbin 9 Board
21, 71 Leaf spring 22, 72 Short shaft
23, 73 Long axis 24, 74
Terminal section
75 Protrusion 76
Notch part 81,
82 Flange 85, 84, 86 Square hole
87 Opening 91 Square hole

Claims (3)

[Claims] 1. An electromagnetic relay comprising at least a pair of L-shaped fixed contact springs fitted into a square hole of a flange of a coil bobbin, and fixed contacts fixed to the short axis sides of the fixed contact springs facing each other. , a leaf spring (71) having a protrusion (75) bent in an L shape and protruding in the direction of extension of the long axis (73), and fixed to the outer surface of the leaf spring (71) on the short axis (72) side. A make side fixed contact spring (7) consisting of a fixed contact (3), a leaf spring (21) bent into an L shape, and a short axis (22) of the leaf spring (21).
) A fixed contact spring (2) on the break side consisting of a fixed contact (3) fixed to the inner surface of the side, and one flange (81)
has a square hole (85) into which the long axis (23) side of the leaf spring (21) is fitted, and a square hole (84) into which the protrusion (75) of the leaf spring (71) is fitted; Flange (82)
a coil bobbin (8) having a square hole (86) into which the long axis (23) side of the leaf spring (21) and the long axis (73) side of the leaf spring (71) are fitted; ), and the terminal portion (24) of the leaf spring (21).
1.) An electromagnetic relay comprising: a substrate (9) having a square hole (91) into which a wire (91) is inserted. 2. The leaf spring (71) of the make-side fixed contact spring (7) has a notch (76) on the long axis (73) side, and a square hole into which the long axis (73) side is inserted. (86) The electromagnetic relay according to claim 1, further comprising an opening (87) on the side through which the notch (73) can pass. 3. When inserting the make-side fixed contact spring (7) according to claim 1 or 2 into the flange of the coil bobbin (8), first, the long axis (7) of the leaf spring (71) is inserted into the flange of the coil bobbin (8).
3) side into the square hole (86) of the flange (82) of the coil bobbin (8), and then insert the leaf spring (71).
A square hole (84) whose flange (81) has a protrusion (75)
) A method for assembling an electromagnetic relay, characterized by inserting it into the relay.