JP2000011838A - Electromagnetic relay and assembling method of iron core of electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the dispersion in performance by setting the contact pressure of a movable contact to a normally-opened fixed contact constant. SOLUTION: In this electromagnetic relay, the distance from the armature support part 8g of a frame 8 to a head part 10c is determined by a second distance data Y selected on the basis of the first distance data X from the armature support part 8g of the frame 8 to a normally-opened fixed contact 6, and a press-in part 10a is provided with an iron core 10 pressed and fixed to the iron core fixing part 8d of the frame 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay for energizing a coil wound on a bobbin to attract an armature and switch a circuit, and a method of assembling an iron core of the electromagnetic relay.

[0002]

2. Description of the Related Art As an electromagnetic relay for energizing a coil wound on a bobbin to attract an armature and switch a circuit, a frame and a normally-open fixed contact are respectively arranged on a terminal base. Is wound, the iron core disposed inside the bobbin, and the movable contact piece are fixed, and the armature fixed to the movable contact piece is supported by the end of the frame and separated from the iron core. There is known an arrangement in which a movable contact is attached to an end of a movable contact piece.

[0003]

In the above-described electromagnetic relay, since the iron core is fixed to the frame by crimping, there is a dimensional error from a portion where the frame alone is attached to the terminal base to an end supporting the armature. In addition, if there is an assembling error that occurs when the frame is attached to the terminal base, the distance between the iron core and the armature will vary in each of the assembled electromagnetic relays. As a result, when the coil is energized and the armature is attracted, the amount of bending of the movable contact piece supporting the movable contact does not become constant, so that the contact pressure of the movable contact with respect to the normally open fixed contact does not become the same, and the There is a problem that the performance of each of the electromagnetic relays varies, and solving this problem has been a problem.

[0004]

An object of the present invention is to provide an electromagnetic relay and a method for assembling an iron core of an electromagnetic relay, wherein the contact pressure of a movable contact with respect to a normally-open fixed contact is kept constant so that the performance of the electromagnetic relay and the electromagnetic relay without variation in performance is maintained. It is intended to provide a method of assembling an iron core.

[0005]

Configuration of the Invention

[0006]

According to an electromagnetic relay according to a first aspect of the present invention, a terminal base, a normally-open fixed contact disposed on the terminal base, and an armature mounted on the terminal base and having an armature at an end. A frame on which an armature supporting portion that can be supported is formed, a bobbin fixed to the frame, an iron core arranged inside the bobbin and having a head at an end on the armature side, wound around the bobbin, and energized A movable contact piece formed of a coil that generates magnetism and a flexible conductive member, one end of which is electrically connected to the frame, and the other end of which is disposed on the normally open fixed contact side; A movable contact arranged at a position facing the normally-open fixed contact of
An electromagnetic relay having an armature whose end is supported by an armature support portion of the frame and is attracted to the core side against the elasticity of the movable contact piece by magnetism generated by the coil. An iron core fixing part for press-fitting is formed.The iron core has a press-fit part which is press-fitted into the iron core fixing part of the frame.The iron core extends in the axial direction from the armature support part of the frame to the normally open fixed contact. The distance from the armature support portion of the frame to the head is determined by the second distance data selected based on the first distance data, and the press-fit portion is press-fitted and fixed to the iron core fixing portion of the frame. It is characterized by having.

In the electromagnetic relay according to a second aspect of the present invention, the terminal base, the first and second coil terminals attached to the terminal base, the fixed contact terminal attached to the terminal base, and the fixed contact terminal. A normally-open fixed contact, a stopper mounted on the terminal base opposite to the normally-open fixed contact, and an armature support portion mounted on the terminal base and capable of supporting an armature at an end. At the same time, a core fixing part for press-fitting and fixing the iron core is formed, a frame having a movable contact terminal, a bobbin fixed to the frame, and a head located at the end of the armature side that is arranged inside the bobbin and has A press-fit portion is formed which is press-fitted into the iron core fixing portion of the frame, and the axial direction of the frame The distance from the armature support portion of the frame to the head is determined by second distance data selected based on the first distance data from the true support portion to the normally-open fixed contact, and the press-fit portion is the core of the frame. An iron core press-fitted and fixed to the fixing portion and ends of windings wound around the bobbin are electrically connected to the first and second coil terminals, and the frame is energized from the first and second coil terminals. Formed by a coil that generates magnetism passing through the armature and the iron core, and a flexible conductive member,
One end is electrically connected to the frame, and the other end is disposed on the normally-open fixed contact side, and the movable contact is disposed away from the normally-open fixed contact, and the stopper is provided when the coil is not energized. The movable contact and the movable contact that are in contact with the armature are supported by the armature support of the frame, and the end is supported by the magnetism generated by the coil and is attracted to the iron core against the movable contact. Thus, an armature for electrically connecting the movable contact to the normally open fixed contact is provided.

In the electromagnetic relay according to a third aspect of the present invention, a bobbin supporting portion capable of supporting the bobbin is formed in the iron core fixing portion of the frame by fitting an iron core receiving portion formed on the bobbin. It is characterized by having a configuration.

In the electromagnetic relay according to a fourth aspect of the present invention, the press-fit portion of the iron core is formed with a knurl forming portion for fixing the press-fit portion by cutting into the iron core fixing portion of the frame. It is characterized by.

In the method for assembling an iron core of an electromagnetic relay according to a fifth aspect of the present invention, a first step of temporarily press-fitting the iron core into the frame to which the bobbin is fixed is performed. 2nd to attach to terminal base
A third step of measuring first distance data from the armature support portion of the frame to the normally-open fixed contact in the axial direction of the iron core; and an armature of the frame based on the first distance data obtained in the third step. The second distance data from the support portion to the head of the iron core is selected, and the second distance data is used to press-fit and fix the press-fit portion of the iron core to the iron-core fixing portion of the frame. It is characterized by.

[0011]

According to the electromagnetic relay and the method of assembling the iron core of the electromagnetic relay according to the first, second, third, fourth, and fifth aspects of the present invention, the iron core is normally opened in the axial direction from the armature support portion of the frame. The distance from the armature support portion of the frame to the head is determined by the second distance data selected based on the first distance data to the fixed contact, and the press-fit portion is press-fitted and fixed to the core fixing portion of the frame. You. Therefore, the first distance data from the armature support portion of the frame to the normally-open fixed contact is obtained by each of the electromagnetic relays in the process of being assembled with the frame and the normally-open fixed contact arranged on the terminal base. Even if they are not the same, the armature supporting portion of the frame and the head of the iron core are provided with the second distance data selected based on the first distance data so that the movable contact pieces have the same amount of bending. The iron core is pressed into the frame.

[0012]

1 to 8 show one embodiment of an electromagnetic relay and a method of assembling an iron core of the electromagnetic relay according to the present invention.

The illustrated electromagnetic relay 1 mainly includes a terminal base 2, a first coil terminal 3, a second coil terminal 4, a fixed contact terminal 5, a normally open fixed contact 6, a stopper 7, a frame 8, a bobbin 9, Iron core 10,
It comprises a coil 11, a movable contact piece 12, a movable contact 13, and an armature 14.

The terminal base 2 is formed of an insulating resin member.
Is provided with a base body 2a having a rectangular plate shape. A case 15 is fitted on the upper side of the base body 2a as shown in FIG.

The base body 2a of the terminal base 2 has first and second coil terminals 3, 4, a fixed contact terminal 5, a stopper 7, and a frame 8, respectively.

The first coil terminal 3 has, at one end of the first coil terminal body 3a fixed to the base body 2a of the terminal base 2 by insert molding, an external connecting portion projecting below the base body 2a. 3b, and the other end of the first coil terminal main body 3a is provided with a first coil connection part 3c protruding above the base main body 2a. The external connection portion 3b is electrically connected to an external circuit by mounting a connector of an external circuit (not shown) below the base body 2a. First
One of the lead portions 16a of the surge absorbing resistor 16 is electrically connected to the coil connecting portion 3c, and
One end of a coil wire 11a provided in the coil 11 is electrically connected.

The second coil terminal 4 is arranged on the base body 2a of the terminal base 2 in a pair with the first terminal 3.
Is provided with an external connection part 4b projecting below the base body 2a at one end of the second coil terminal body 4a fixed to the base body 2a by insert molding. At the other end, a second coil connection portion 4c protruding above the base body 2a is provided. The external connection portion 4b is electrically connected to an external circuit by mounting a connector of an external circuit (not shown) below the base body 2a. The other lead portion 16b of the surge absorbing resistor 16 is electrically connected to the second coil connection portion 4c.
1 is electrically connected to the other end of the coil wire 11a.

The fixed contact terminal 5 has an external connection portion 5b protruding below the base body 2a at one end of the fixed contact terminal body 5a fixed to the base body 2a of the terminal base 2 by insert molding. ,
The base body 2 is attached to the other end of the fixed contact terminal body 5a.
The fixed contact mounting portion 5c is provided to stand up and protrude from the upper side of FIG. The external connection portion 5b is electrically connected to an external circuit by mounting a connector of an external circuit (not shown) below the base body 2a. Fixed contact mounting part 5
The normally open fixed contact 6 is fixed to c. The normally-open fixed contact 6 is arranged in parallel with a frame main body 8 a provided on the frame 8.

The stopper 7 is press-fitted and fixed to the base body 2a of the terminal base 2 in parallel with the fixed contact mounting portion 5c of the fixed contact terminal 5 so as to face the normally open fixed contact 6. The stopper 7 is disposed at a predetermined distance from the normally-open fixed contact 6, and the movable contact 13 contacts the stopper 7 when the coil 11 is not excited.

The frame 8 is for forming a magnetic path of the magnetism generated by the coil 11, and is formed in an L-shape using a magnetic member as a raw material. In this frame 8,
Frame body 8 press-fitted into base body 2a of terminal base 2 and arranged upright on base body 2a
The movable contact terminal 8b protruding below the base body 2a is formed at one end of the frame body 8a. At the other end of the frame body 8a, an armature support plate 8c that is bent perpendicular to the frame body 8a and substantially parallel to the base body 2a of the terminal base 2 is formed.

The frame body 8a of the frame 8 is provided with an iron core fixing portion 8d. This iron core fixing portion 8d
The terminal base 2 is disposed substantially at the center of the frame main body 8a, and is formed to protrude in a cylindrical shape along the plate direction of the base main body 2a of the terminal base 2. A bobbin support portion 8e is formed on the outer peripheral portion of the core fixing portion 8d.
An iron core receiving hole 8f is formed at the center of d.

The bobbin supporting portion 8e of the core fixing portion 8d has a height L1 on the frame body 8a, and has an inner diameter D of the core accommodating portion 9a provided on the bobbin 9.
The outer diameter D2 is slightly smaller than D1. The bobbin 9 is fixed to the frame 8 side by fitting the core accommodating portion 9a provided on the bobbin 9 into the bobbin supporting portion 8e of the core fixing portion 8d.

The core receiving hole 8f of the core fixing portion 8d is
0, the inner diameter D4 is slightly larger than the outer diameter D3 of the press-fitting portion 10a, and the depth is the sum of the height L1 of the bobbin support 8e and the thickness L2 of the frame body 8a. It has a dimension L3. The depth L3 of the core receiving hole 8f is set to a value substantially equal to the length L4 of the press-fitting portion 10a provided in the iron core 10. With the bobbin 9 supported by the bobbin support portion 8e, the iron core 10 is inserted into the core receiving portion 9a of the bobbin 9 in the iron core receiving portion 8f, and the second distance data Y selected by measurement to be described later. Thus, the press-fitting portion 10a of the iron core 10 is press-fitted. At this time, since the depth L3 of the core receiving hole 8f is set to a value substantially equal to the length L4 of the press-fit portion 10a of the iron core 10, the press-fit portion 10a of the iron core 10 is securely supported without falling off. Stick.

At the tip of the armature support plate 8c, an armature support portion 8g having a height L5 on the base body 2a of the terminal base 2 and having an acute angle is formed. The armature support portion 8g is arranged parallel to the plate direction of the frame body 8a, and the bottom surface 14a provided on the armature 14 is in contact with the armature support portion 8g. The armature support 8g serves as a fulcrum when the armature 14 rotates, and is used for obtaining first distance data X in measurement described later.

The armature support plate 8c is provided with movable contact piece fixing portions 8h, 8h, respectively. The movable contact piece fixing portions 8h, 8h are used for caulking and fixing the frame fixing holes 12a, 12a formed at one end of the movable contact piece 12.

The movable contact piece 12 is formed in an L-shape by a flexible conductive member. The movable contact piece 12 has frame fixing holes 12a, 12a formed at one end, and the other end. Armature fixing hole 12 near the part
b and 12b are respectively formed, and the movable contact 13 is provided at the other end.
Is installed.

Movable contact piece fixing portions 14b, 14b protruding from the armature 14 are fixed by caulking to the armature fixing holes 12b, 12b, respectively. Movable piece 1
2 has a center portion bent so that the other end portion can be elastically deformed with respect to the one end portion, and the other end portion has a base body 2 of the terminal base 2.
a, the movable contact 13 is
When the armature 14 is not attracted to the iron core 10 and the armature 14 is off, the movable contact 13 is urged toward the stopper 7 so as to contact the stopper 7.

In the armature 14, movable armature fixing portions 14b, 14b are respectively formed on an armature body 14c formed of a magnetic member as a material and having a substantially pentagonal shape. The armature 14 has movable contact piece fixing portions 14b, 14
b is the armature fixing holes 12b, 12 of the movable contact piece 12.
b, the movable contact piece 1
2 is electrically connected to and integrally connected to the bottom surface 12a.
Is in contact with the armature support portion 8g of the frame 8.

A bobbin 9 is mounted on a frame body 8a of the frame 8. The bobbin 9 has a coil winding portion 9d formed between the first outer plate 9b and the second outer plate 9c, and penetrates from the first outer plate 9b to the second outer plate 9c. A round-shaped iron core accommodating portion 9a is formed.

The coil 11 around which the coil wire 11a is wound is disposed in the coil winding portion 9d of the bobbin 9. One end of the coil wire 11a is electrically connected to the first coil terminal 3 as described above, and the other end of the coil wire 11b is electrically connected to the second coil terminal 4 as described above. I have.

The iron core accommodating portion 9a of the bobbin 9 has an iron core 10
Is inserted. The iron core 10 is formed by using a magnetic member as a raw material.
The press-fit portion 10a is formed at the base end of the core body 10b.
a head 1 having a larger outer diameter than the core body 10b
0c is formed.

The press-fit portion 10a of the iron core 10 is
The outer diameter D3 is smaller than the outer diameter D5 of b, and the length L4. A knurl forming portion 10d is provided on an outer peripheral portion of the press-fitting portion 10a.

The core 10 is inserted into and fixed to the bobbin support 8e of the frame 8 until the second outer plate 9c of the bobbin 9 contacts the frame body 8a of the frame 8. The press-fit portion 10a comes first, and the bobbin 9
The press-fitting portion 10a is inserted into the core receiving portion 9a of the frame 8 such that the distance from the head 10c to the armature supporting portion 8g of the frame 8 matches the second distance data Y selected by measurement described later. It is pressed into the hole 8f. At this time, the press-fitting portion 10a of the iron core 10 is securely press-fitted and fixed without dropping into the iron core receiving portion 8f of the frame 8 by the knurl forming portion 10d biting into the iron core receiving portion 8f of the frame 8.

The core 10 is assembled to the frame 8 by the steps shown in FIGS. First and second coil terminals 3 and 4, fixed contact terminals 5, and stoppers 7 are attached to the terminal base 2.

In the first stroke shown in FIG. 4, the iron core 10 is inserted into the bobbin support portion 8e with the press-fit portion 10a first with respect to the iron core fixing portion 8a of the frame 8 in which the iron core accommodating portion 9a of the bobbin 9 is fitted and fixed. The press-fit portion 10a of the iron core 10 is inserted.
Is temporarily press-fitted into the iron core receiving hole 8f of the frame 8 by a predetermined dimension to form the assembly 50. At this time, since the press-fit portion 10a of the iron core 10 is only temporarily press-fitted into the iron-core receiving portion 8f of the frame 8, the head portion 10c is arranged away from the first outer plate 9b of the bobbin 9.

In the second step executed after the first step, as shown in FIG. 5, the first and second coil terminals 3, 4, the fixed contact terminal 5, and the stopper 7 have already been attached, respectively. Assembly 50 on terminal base 2
Is disposed, the movable contact terminal 8b provided on the frame body 8a of the frame 8 is connected to the terminal base 2a.
And is press-fitted and fixed. Also at this time, since the iron core 10 is held while being temporarily pressed into the iron core receiving hole 8f of the frame 8, the head 10c is
Of the first outer plate 9b.

In a third step executed after the second step, as shown in FIG. 6, the first step from the armature support portion 8g of the frame 8 to the normally open fixed contact 6 in the axial direction of the iron core 10 is performed. Distance data X is measured. When measuring the first distance data X, the distance data A from the base body 2a of the terminal base 2, that is, the end of the frame body 8a of the frame 8 to the normally open fixed contact 6, and
The difference from the distance data B from the end of the frame body 8a of the frame 8 to the armature support 8g of the frame 8 is used. The first distance data X is in the middle of assembling due to a dimensional error when the frame 8 is created as a single body, an assembling error generated when the frame 8 is pressed into the base body 2a of the terminal base 2, and the like. May be different in each of the electromagnetic relays 1.

In the fourth step executed after the third step, as shown in FIG. 7, the first distance data X obtained in the third step is used to correspond to the graph shown in FIG. Then, the second distance data Y is selected. For example, if the first distance X is 0.7 mm, the armature 14 is attracted and moved against the movable contact piece 12 by exciting the coil 11 when the second distance X is 0.7 mm. The contact pressure of the movable contact 13 electrically connected to the open fixed contact 6 is obtained as 0.25 mm selected corresponding to a predetermined setting line so that the contact pressure becomes 100 g. The second distance data Y is subtracted from the distance data B from the end of the frame body 8a of the frame 8 to the armature support portion 8g of the frame 8, so that the second distance data Y Head 10
It is used as distance data C to c.

In the fourth step, the press-fitting portion 10a of the iron core 10 is moved by a press-fitting jig (not shown) so that the distance data C from the end of the frame body 8a of the frame 8 to the head 10c of the core 10 becomes the distance data C. 8 is press-fitted and fixed in the iron core receiving hole 8f. At this time, the press-fitting portion 10a of the iron core 10 which has been temporarily press-fitted is inserted into the core receiving hole 8f of the frame 8.
Is further press-fitted into the knurl forming section 10.
d bites into the iron core receiving hole 8f and is securely fixed.

In the fourth step, the distance data C from the frame main body 8a of the frame 8 to the head 10c of the iron core 10 is obtained.
As described above, the press-fitting portion 10a of the iron core 10 is press-fitted and fixed in the iron core receiving hole 8f of the frame 8, so that when the frame 8 is formed as a single body, the armature starts from the end of the frame main body 8a. The first distance data in each of the electromagnetic relays 1 during assembly due to a dimensional error occurring up to the support portion 8g, an assembly error occurring when the frame 8 is pressed into the base body 2a of the terminal base 2, and the like. Even if X has different values and is not the same, the iron core 10 is connected to the frame 8 so that the amount of deflection of the movable contact pieces 12 corresponding to the contact pressure of the movable contact 13 with respect to the normally-open fixed contact 6 is the same. To be press-fitted.

After the iron core 10 is mounted as described above, the electromagnetic relay 1 to which the movable contact piece 12 and the armature 14 are mounted respectively has a connector of an external circuit (not shown) mounted below the base body 2a. As a result, the external connection portions 3b of the first and second coil terminals 3, 4
4b, the external connection part 5b of the fixed contact terminal 5, and the movable contact terminal 8b of the frame 8 are electrically connected to an external circuit. When the electromagnetic relay 1 is turned off, the armature 14 is separated from the head 10c of the iron core 10 by the urging force of the movable contact piece 12, so that the movable contact 1
3 is in contact with the stopper 7 apart from the normally-open fixed contact 6, so that the fixed contact terminal 5 is
b.

When a current of a power source is supplied from an external circuit to the first coil terminal 3, the coil 11, and the second coil terminal 4 to excite the coil 11, the core body 10b of the core 10 and the core 10 , The armature supporting plate 8c of the frame 8, the armature supporting portion 8g of the frame 8, the armature 14, and the head 10c of the iron core 10 generate magnetism. The armature 14 is attracted to the head 10c side of the iron core 10 against the urging force, and the armature 14 is attracted and moved to the head 10c side of the iron core 10, whereby the movable contact 13 separates from the stopper 7 and is normally moved. It is electrically connected to the open fixed contact 6. At this time, the contact pressure when the movable contact 13 is electrically connected to the normally-open fixed contact 6 is 100 g as described above. Movable contact 1
By electrically connecting 3 to the normally-open fixed contact 6, the fixed contact terminal 5 is conducted to the movable contact terminal 8b, and the circuit is conducted.

As described above, when the frame 8 is formed as a single unit, the dimensional error occurring from the end of the frame main body 8a to the armature support portion 8g, or when the frame 8 is pressed into the base main body 2a of the terminal base 2. In each of the electromagnetic relays 1 during assembly due to an assembling error or the like that has occurred at the time of the mounting, the first distance data from the armature support portion 8g of the frame 8 to the normally open fixed contact 6 in the axial direction of the iron core 10. Even if X has variations and different values, the second distance data Y selected so that the amounts of deflection of the movable contact pieces 12 are the same, respectively, from the head 10c of the iron core 10 to the armature of the frame 8. Since up to the supporting portion 8g is determined and the iron core 10 is press-fitted into the frame 8, in each of the assembled electromagnetic relays 1,
The contact pressure of the movable contact 13 with respect to the normally-open fixed contact 6 becomes a constant value. Also, compared to a conventional one in which the iron core is swaged and fixed to the frame, the iron core 10
Press-fitting portion 10a is cylindrical iron core fixing portion 8d of frame 8
, The contact area between the frame 8 and the iron core 10 becomes larger. Therefore, the large contact area between the frame 8 and the iron core 10 reduces the operating voltage used to excite the coil 11, and the use of a low operating voltage reduces the number of turns of the coil wire 11a and reduces the coil wire 11a. Is reduced.

[0044]

As described above, according to the electromagnetic relay and the method of assembling the iron core of the electromagnetic relay according to the first, second, third, fourth, and fifth aspects of the present invention, the iron core is moved in the axial direction. The distance from the armature support portion of the frame to the head is determined by second distance data selected based on the first distance data from the armature support portion of the frame to the normally open fixed contact, and the press-fit portion is It is press-fitted and fixed to the core fixing part of the frame. Therefore, the first distance data from the armature support portion of the frame to the normally-open fixed contact is obtained by each of the electromagnetic relays in the process of being assembled with the frame and the normally-open fixed contact arranged on the terminal base. Even if they are not the same, the armature supporting portion of the frame and the head of the iron core are provided with the second distance data selected based on the first distance data so that the movable contact pieces have the same amount of bending. The iron core is pressed into the frame. Therefore, the contact pressure of the movable contact with respect to the normally-open fixed contact becomes constant, so that there is an excellent effect that stable performance is obtained.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of an electromagnetic relay in an off state in an embodiment of an electromagnetic relay and a method of assembling an iron core of the electromagnetic relay according to the present invention.

FIG. 2 is a longitudinal sectional front view of the electromagnetic relay shown in FIG. 1 in an ON state.

FIG. 3 is an external perspective view illustrating an assembling relationship of each component of the electromagnetic relay illustrated in FIG. 1;

FIG. 4 is a process chart illustrating a procedure of an assembling method of an iron core used in the electromagnetic relay shown in FIG. 1;

FIG. 5 is a process chart for explaining a procedure of an assembling method of an iron core used in the electromagnetic relay shown in FIG. 1;

FIG. 6 is a process chart for explaining a procedure of an assembling method of an iron core used in the electromagnetic relay shown in FIG. 1;

FIG. 7 is a process chart for explaining a procedure of an assembling method of an iron core used in the electromagnetic relay shown in FIG. 1;

FIG. 8 is a graph used for selecting dimensions in a method of assembling an iron core used in the electromagnetic relay shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 2 Terminal base 3 1st coil terminal 4 2nd coil terminal 5 Fixed contact terminal 6 Normally open fixed contact 7 Stopper 8 Frame 8d Iron core fixing part 8e Bobbin support part 8g Armature support part 9 Bobbin 10 Iron core 10a Press-fit part 10c Head 10d Knurl forming part 11 Coil 12 Movable contact piece 13 Movable contact 14 Armature

Continued on the front page (72) Inventor Nobuhiro Furushima 1760 Higashimatano-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside (72) Inventor Hisashi Samata 1760 Higashimatano-cho, Totsuka-ku, Yokohama-shi, Kanagawa Pref. Inside the corporation

Claims (5)

[Claims] A terminal base; a normally-open fixed contact disposed on the terminal base; and a frame mounted on the terminal base and having an armature supporting portion formed at an end thereof so as to support the armature. A bobbin fixed to the frame, an iron core disposed inside the bobbin and having a head at an end on an armature side, a coil wound around the bobbin to generate magnetism when energized, A movable contact piece, one end of which is electrically connected to the frame, and the other end of which is disposed on the normally open fixed contact side; and A movable contact disposed at an opposing position, and coupled to the movable contact piece, and an end is supported by an armature support portion of the frame, and the magnet generates the coil. An electromagnetic relay having an armature that is attracted and moved toward the iron core against the elasticity of the movable contact piece, wherein the frame is provided with an iron core fixing portion for press-fitting and fixing the iron core. A press-fitting portion that is press-fitted into the iron core fixing portion of the frame is formed. The iron core is formed in the axial direction based on first distance data from the armature support portion of the frame to the normally open fixed contact. An electromagnetic relay, wherein the distance from the armature support portion of the frame to the head is determined by the selected second distance data, and the press-fit portion is press-fitted and fixed to the iron core fixing portion of the frame. 2. A terminal base; first and second coil terminals mounted on the terminal base; fixed contact terminals mounted on the terminal base; and normally-open fixed disposed on the fixed contact terminal. A contact, a stopper mounted on the terminal base opposite to the normally-open fixed contact, an armature supporting portion mounted on the terminal base and capable of supporting an armature at an end portion, and an iron core. A frame having a movable contact terminal formed with an iron core fixing part for press-fitting and fixing; a bobbin fixed to the frame; a head disposed at an end of the armature side which is arranged inside the bobbin; and A press-fit portion is formed to be press-fitted into the iron core fixing portion of the frame, and the armature of the frame is formed in the axial direction. The from Interview A support portion to the normally open fixed contact 1
The distance from the armature support portion of the frame to the head is determined by the second distance data selected based on the distance data of the frame, and the press-fit portion is press-fitted and fixed to the iron core fixing portion of the frame. An end of a winding wound around the bobbin is electrically connected to the first and second coil terminals, and the frame, the armature and the iron core are energized by the first and second coil terminals. A movable contact piece formed of a coil that generates magnetism passing therethrough and a flexible conductive member, one end of which is electrically connected to the frame, and the other end of which is disposed on the normally open fixed contact side And a movable contact that is disposed apart from the normally-open fixed contact by the movable contact and that contacts the stopper when the coil is not energized; Is supported by the armature support portion of the frame, and the coil is attracted to the iron core side by the generated magnet against the movable contact piece, thereby electrically connecting the movable contact to the normally open fixed contact. An electromagnetic relay comprising an armature to be connected. 3. A bobbin supporting portion capable of supporting a bobbin by fitting an iron core accommodating portion formed on the bobbin into the iron core fixing portion of the frame. Electromagnetic relay according to the item. 4. The knurl forming portion for fixing the press-fit portion by cutting into the iron core fixing portion of the frame is formed in the press-fit portion of the iron core. Electromagnetic relay. 5. A first step of temporarily press-fitting the iron core into the frame to which the bobbin is fixed, a second step of mounting the frame with the bobbin fixed thereto and the temporarily press-fitted iron core to the terminal base, and A third step of measuring first distance data from the armature support section to the normally-open fixed contact; a third step from the armature support section of the frame to the head of the iron core based on the first distance data obtained by the third step. 4. The method according to claim 1, further comprising a fourth step of selecting the second distance data, and press-fixing the press-fit portion of the iron core to the iron-core fixing portion of the frame with the second distance data.
3. The method for assembling the core of the electromagnetic relay according to 3 or 4.