JP3666096B2 - Electromagnetic relay and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic relay, and more particularly to electrical connection of its internal components.
[0002]
[Prior art]
Conventionally, as an electromagnetic relay, for example, as shown in FIGS. 9 and 10, there is one in which an electromagnet block 4 is arranged on a base 3 on which a fixed contact terminal 1 and a coil terminal 2 are press-fitted and fixed.
In this electromagnet block 4, the lead wire of the coil 4a wound around the spool 5 having the flanges 5a and 5b at both ends is electrically connected to the relay terminal 5c provided on the flange 5b of the spool 5 and soldered. The steel core 6 having a substantially T-shaped cross section is inserted into the center hole of the spool 5 and the projecting one end is used as a magnetic pole part 6a, while the projecting other end 6b is bent into a substantially L-shaped section. The yoke 4b is caulked and fixed to the vertical portion.
[0003]
The yoke 4b supports a movable iron piece 8 so as to be rotatable via a substantially rectangular hinge spring 7 at a horizontal front end portion thereof, and a common terminal 4c is caulked and fixed to a vertical lower end portion of the yoke 4b. . Further, a movable contact 7b is provided at the free end of the movable contact piece 7a extending from the tip of the hinge spring 7, while a bent fixed contact having a fixed contact 9a is provided on the flange portion 5a of the spool 5. A terminal 9 is provided.
[0004]
Then, the common terminal 4c and the fixed contact terminal 9 of the electromagnet block 4 are press-fitted and fixed in the terminal hole of the base 3, and the relay terminal 5c is electrically connected to the coil terminal 2 by the solder 5d, whereby the movable contact 7b is formed. The fixed contacts 1a and 9a are opposed to each other so as to be able to contact and separate alternately.
[0005]
Therefore, when no voltage is applied to the coil 4a, the movable contact 7b provided on the movable contact piece 7a is in contact with the fixed contact 1a by the spring force of the hinge spring 7.
When a voltage is applied to the coil 4a for excitation, the movable iron piece 8 is attracted to the magnetic pole portion 6a of the iron core 6 against the spring force of the hinge spring 7, and the movable contact 7b is dissociated from the fixed contact 1a and fixed. After contacting the contact 9 a, the movable iron piece 8 is attracted to the magnetic pole part 6 a of the iron core 6.
Next, when the above-described excitation is released, the movable iron piece 8 is reversed by the spring force of the hinge spring 7 to return to the original state, and the movable contact 7b is switched from the fixed contact 9a to the fixed contact 1a.
[0006]
[Problems to be solved by the invention]
However, in the electromagnetic relay described above, as shown in FIG. 9B, the electrical connection between the relay terminal 5c and the coil terminal 2 of the electromagnet block 4 is performed via the solder 5d. For this reason, not only the operation failure is liable to occur due to the soldering connection failure, but also the solder waste is scattered and remains in the electromagnetic relay during the soldering, and this solder waste is left between the fixed contacts 1a, 9a and the movable contact 7b. Or between the movable iron piece 8 and the magnetic pole portion 6a of the iron core 6 to cause a contact failure.
[0007]
In view of the above problems, an object of the present invention is to provide an electromagnetic relay and a method for manufacturing the same that can prevent malfunction and contact failure due to soldering by eliminating electrical connection by soldering.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the electromagnetic relay according to the present invention has a relay terminal provided on a collar portion of a spool of an electromagnetic block placed on the upper surface of the base at an upper end portion of a coil terminal standing on the upper surface of the base. In the electromagnetic relay to be electrically connected, the common terminal fixed to the yoke of the electromagnet block is press-fitted and fixed to the terminal hole of the base, and the caulking that protrudes from the side surfaces of the upper ends of the pair of coil terminals standing on the upper surface of the base A caulking through hole provided in each of the pair of relay terminals is fitted in the projection for positioning, and is positioned and fixed by caulking through positioning through holes provided in the relay terminal and the coil terminal, respectively. .
In the electromagnetic relay manufacturing method according to the present invention, the relay terminal provided on the flange portion of the spool of the electromagnetic block placed on the upper surface of the base is electrically connected to the upper end portion of the coil terminal standing on the upper surface of the base. In the manufacturing method of the electromagnetic relay, the caulking protrusion provided in the relay terminal is fitted into the caulking protrusion protruding from the upper end side surface of the coil terminal, and the upper end side surface of the coil terminal and the relay terminal And positioning by inserting a positioning jig pin into the positioning through hole provided in the upper end portion of the coil terminal and the positioning through hole provided in the relay terminal, and the caulking protrusion It consists of a caulking and fixing process.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment according to the present invention will be described with reference to the accompanying drawings of FIGS.
The electromagnetic relay according to the present embodiment includes a base 10, an electromagnet block 30 in which fixed contact terminals 20 and 21 and coil terminals 22 and 22 fixed to the base 10 and a common terminal 26 are integrated, and a hinge spring 40. The movable iron piece 44 and the case 50 are integrated.
[0010]
As shown in FIG. 3, the base 10 has a position restricting / insulating wall 12 projecting between a pair of opposed position restricting projections 11, 11 projecting from the center of the upper surface thereof. Tapered surfaces 11a and 11a are formed on the opposing surfaces of the projecting projections 11 and 11 so as to come into contact with the tip shoulders of the movable iron 44, which will be described later, to regulate the positions in the C1 and C2 directions, and the positions in the B direction. While a locking surface 11b for regulating is formed, insulating walls 13 extend from the base of the position regulating projection 11 respectively.
A flat contact terminal hole 14 having a substantially L-shape is provided between the insulating walls 13 and 13, and a coil terminal terminal hole 15 (in FIG. 3) is formed at the base of the insulating wall 13. The terminal hole on the back side is not shown.). Furthermore, a common terminal terminal hole 17 is provided in parallel at a position away from the fixed contact terminal hole 16 provided at the base of the position regulating and insulating wall 12 by a predetermined distance.
[0011]
The fixed contact terminal 20 has a shape bent by pressing, and has a fixed contact 20a at the horizontal tip thereof, while the fixed contact terminal 21 has a substantially Γ-shaped side surface and is fixed to the horizontal tip. While having the contact 21a, the notch 21b is formed in the bent corner | angular part.
[0012]
The coil terminal 22 includes a thick terminal portion 23 for press-fitting into the base 10 and a thin connection portion 24 extending from the upper end of the terminal portion 23. A through-hole 24b and a protruding projection 24c are formed vertically below a shoulder portion 24a formed by cutting out an electrical connection slit 24d, and an electrical connection slit 24d is formed at the upper end of the remaining half on one side.
[0013]
Then, the fixed contact terminal 20 is press-fitted into the terminal hole 14 of the base 10 and fixed by caulking, while the fixed contact terminal 21 is press-fitted into the terminal hole 16 and brought into contact with the upper end surfaces of the position restricting projections 11 and 11. After positioning, the fixed contacts 20a and 21a face each other at a predetermined interval by caulking and fixing.
Further, the coil terminals 22 are press-fitted into the terminal holes 15 provided in the base portion of the insulating wall 13 of the base 10 from above to be caulked and fixed, and then electric elements 25 such as resistors and diodes are press-fitted into the slits 24d. Connecting. This electric element 25 is for reducing the influence on the user side circuit by the surge voltage generated from the coil 34.
[0014]
As shown in FIG. 6, the common terminal 26 is integrally formed with a substantially gate-shaped connecting portion 27 at an upper end portion thereof, and a position-regulating cutout portion 27 a is formed at an inner side edge of the opposite side of the connecting portion 27. On the other hand, two through holes 28a and two fitting protrusions 28b are formed vertically on the tongue piece 28 extending downward from the inner edge of the upper side.
[0015]
In the electromagnet block 30, a coil 34 is wound around a body (not shown) of a spool 33 having flanges 31 and 32 at both ends, and a lead wire 35 a of a relay terminal 35 provided on the flange 31 is provided. The yoke 36 is fixed by an iron core 38 while being bent and soldered.
[0016]
The relay terminal 35 has through holes 35b and 35c, and a lower edge 35d thereof is bent outward, and is press-fitted and fixed in a slit (not shown) provided in the flange 31. ing.
[0017]
The yoke 36 is bent at a substantially right angle, and a protruding step portion 37 serving as a spacer is formed on the back surface of the vertical portion. Two protrusions 37a and 37b are formed on the surface of the protruding step portion 37 by protruding upward and downward.
[0018]
Then, the through hole 28a of the common terminal 26 is fitted into the protrusion 37a provided on the protruding step portion 37 of the yoke 36, and the back recess of the protruding protrusion 28b of the common terminal 26 is fitted into the protrusion 37b of the yoke 36. After positioning, the protrusion 37a is crimped and fixed.
According to the present embodiment, not only the through holes 28a and 28a of the common terminal 26 are fitted to the protrusions 37a and 37a of the yoke 36, but also the back surfaces of the protrusions 28b and 28b of the common terminal 26 to the protrusions 37b and 37b of the yoke 36. Since the concave portion is fitted and the common terminal 26 is positioned at four points on the yoke 36, there is an advantage that the common terminal 26 is not rattled and the assembly accuracy is high.
[0019]
Next, a mounting hole (not shown) of the yoke 36 in which the common terminal 26 is integrated with a center hole (not shown) provided in the body portion of the spool 33 of the electromagnet block 30 is positioned on the same axis. The electromagnet block 30 having the common terminal 26 is obtained by inserting the iron core 38 having a substantially T-shaped cross section and setting the protruding one end portion as the magnetic pole portion 38a and the protruding other end portion 38b. .
[0020]
According to the present embodiment, since the common terminal 26 is fixed to the yoke 36 via the protruding step portion 37, a gap is generated between the two and it is easy to radiate heat.
Further, since the upper end portion of the common terminal 26 is caulked and fixed to the substantially central portion of the vertical surface of the yoke 36, there is an advantage that the distance from the yoke 36 to the lower end portion of the common terminal 26 is long and the transmitted heat can be reduced. .
[0021]
In the above-described embodiment, the case where a total of four protrusions 37a and 37b are formed on one protrusion step portion 37 has been described. However, the present invention is not limited to this. For example, one protrusion step portion has one protrusion step. Or two protrusions may be formed on one protruding step.
In addition, the common terminal 26 is fixed to the yoke 36 by caulking. However, the present invention is not limited to this, and may be fixed by welding or screws.
Furthermore, in the above-described embodiment, the case where the predetermined gap is formed by the protruding step portion 37 provided on the yoke 36 has been described. However, the present invention is not limited to this, and a separate spacer may be assembled to the yoke 36, or The gap may be formed by projecting or bending the common terminal 26.
[0022]
Next, the electromagnet block 30 with the common terminal 26 assembled is positioned on the base 10 with the fixed contact terminals 20 and 21 and the coil terminals 22 and 22 assembled from above, and the common terminal 26 is press-fitted into the terminal hole 17 of the base 10. On the other hand, the flange 31 of the spool 33 is positioned on the upper end surface of the position restricting projections 11 and 11 via the fixed contact terminal 21, and the relay terminal 35 provided on the flange 31 is connected to the shoulder 24 a of the coil terminal 22. And is positioned (FIG. 4). For convenience of explanation, the fixed contact terminals 20 and 21 are not shown in FIG.
Then, when the electromagnet block 30 is pushed down, as shown in FIG. 5, the lower end edge portion 35d of the relay terminal 35 bent outward is lowered along the outward surface of the coil terminal 22, and after getting over the protrusion 24c, The through hole 35 c is fitted into the protrusion 24 c of the coil terminal 22, and the through hole 35 b of the relay terminal 35 communicates with the through hole 24 b of the coil terminal 22. Then, the jig pin 18 is inserted and positioned in the through holes 24b and 35b, and the protrusion 24c is caulked to complete the assembly work of the electromagnet block 30.
[0023]
According to the present embodiment, positioning can be facilitated because the positioning can be performed simply by inserting the jig pins 18 into the through holes 24b and 35b.
Moreover, since the protrusion 24c of the coil terminal 22 is extrusion molding by crushing, its back surface is flat. For this reason, there is no need for a crimping receiving pin that matches the protruding shape, and there is an advantage that the crimping operation is facilitated.
[0024]
As shown in FIG. 6, the hinge spring 40 is made of a conductive thin plate spring material bent into a substantially L shape, and a fixed contact 42 is provided at the tip of a movable contact piece 41 extending from the horizontal portion. The movable iron piece 44 is caulked and fixed to the upper surface of the base portion of the horizontal portion, and caulking fixing through holes 43 and 43 are provided above the vertical portion. Furthermore, the movable iron piece 44 is formed with a tapered surface 45a and a locking edge 45b by cutting off the front shoulder portion.
[0025]
Then, the distal end portion of the movable contact piece 41 is inserted from the opening portion of the substantially gate-shaped connection portion 27 of the common terminal 26 assembled to the base 10 and the cutout portion 21b (FIG. 3) of the fixed contact terminal 21, and the hinge spring 40 is By fitting the through hole 43 to the protrusions 28b and 28b of the common terminal 26 and fixing them by caulking (FIG. 7A), one end of the movable iron piece 44 is supported so as to be rotatable about the lower end surface of the yoke 36. At the same time (FIG. 7B), the other end faces the magnetic pole portion 38a of the iron core 38 so as to be able to contact and separate (FIG. 1), while the movable moving contact 42 of the movable contact piece 41 is a fixed contact 20a, 21a. Opposite to each other so as to be able to contact and separate.
Finally, the assembly operation is completed by fitting the case 50 to the base 10.
According to the present embodiment, as shown in FIG. 7B, the protrusions 37b of the yoke 36 are fitted in the recesses formed on the back surface of the protrusions 28b of the common terminal 26. It ’s true. For this reason, even if the protrusion 28b is fixed by caulking, there is an advantage that the caulking can be stably fixed without being depressed.
[0026]
According to the present embodiment, the case where the hinge spring 40 is caulked and fixed to the common terminal 26 has been described, but it may be welded or screwed.
[0027]
The operation of the electromagnetic relay having the above configuration will be described.
First, when no voltage is applied to the coil 34 of the electromagnet block 30, the movable iron piece 44 is urged downward by the spring force of the hinge spring 40, and the movable contact 42 is in contact with the fixed contact 20a. .
[0028]
When a voltage is applied to the coil 34 for excitation, the magnetic pole portion 38a of the iron core 38 attracts the movable iron piece 44, and the movable iron piece 44 rotates against the spring force of the hinge spring 40. After the contact piece 41 rotates and the movable contact 42 is separated from the fixed contact 20a and contacts the fixed contact 21a, the movable iron piece 44 is attracted to the magnetic pole portion 38a of the iron core 38 (FIG. 1).
[0029]
Next, when the above-described excitation is released, the movable iron piece 44 is reversed by the spring force of the hinge spring 40, returns to the original state, and the movable contact 42 is switched to the fixed contact 20a.
[0030]
Next, a case where an impact load is applied from the outside to the electromagnetic relay having the above-described configuration will be described.
First, as shown in FIG. 8, when a small impact load in the direction of arrow A is applied to the movable iron piece 44, one end portion of the movable iron piece 44 is locked to the pair of notches 27 a of the common terminal 26, and the hinge The plastic deformation of the spring 40 is prevented.
Furthermore, when a larger impact load is applied in the direction of arrow A, the movable iron piece 44 comes into contact with the upper end surface of the position regulating and insulating wall 12 via the movable contact piece 41, and the rotation angle of the movable iron piece 44 is unlimited. In the same manner as described above, a change in operating characteristics due to plastic deformation of the hinge spring 40 is prevented.
Note that the movable iron piece 44 may be brought into contact with the upper end surface of the position regulating insulating wall 12 via the movable contact piece 41 at the same time as being engaged with the notch 27 a of the common terminal 26.
[0031]
Next, when an impact load in the direction of arrow B is applied to the movable iron piece 44, a locking edge 45 b provided on the front shoulder portion of the movable iron piece 44 is formed on the locking surface 11 b provided on the position restricting projection 11. By locking, the amount of movement of the movable iron piece 44 in the B direction is restricted, and a change in operating characteristics due to plastic deformation of the hinge spring 40 is prevented.
[0032]
Further, when an impact load in the directions of arrows C1 and C2 is applied to the movable iron piece 44, the tapered surface 11a provided on the position restricting projection 11 has a tapered surface 45a provided on the front shoulder portion of the movable iron piece 44. By contact, the amount of movement of the movable iron piece 44 in the directions of the arrows C1 and C2 is restricted, and a change in operating characteristics due to plastic deformation of the hinge spring 40 is prevented.
[0033]
According to the present embodiment, since the tapered surface 11 a is provided on the opposing surface of the position restricting projections 11, 11, these become the guide surfaces of the movable iron piece 44.
Further, since the position restricting projections 11 and 11 and the position restricting / insulating wall are not individually formed on the base 10 and are integrally projected, there is an advantage that the shape and structure thereof are simplified.
[0034]
According to the above-described embodiment, the case where the position restricting protrusion 11 of the base 10 and the tip shoulder portion of the movable iron piece 44 are tapered surfaces has been described. While forming a substantially right-angled corner on the surface, the position restriction in the B direction and the C1, C2 direction may be performed by forming the shape of the front shoulder portion of the movable iron piece to correspond to this.
[0035]
【The invention's effect】
As is apparent from the above description, according to the electromagnetic relay according to claim 1 of the present invention, the relay terminal provided on the electromagnet block is caulked and fixed to the coil terminal erected on the base, so there is no need for soldering. . For this reason, not only does the operation failure due to the soldering connection failure disappear, but also the contact failure caused by the solder scraps can be prevented.
In addition, since the electromagnetic block is supported on the base at three points via the common terminal press-fitted to the base and the pair of relay terminals caulked to the pair of coil terminals erected on the base, there is no backlash. Assembly accuracy is high.
According to the second aspect , since the positioning jig pin is inserted into the positioning through hole of the coil terminal and the positioning through hole of the relay terminal for positioning, the fitting between the caulking protrusion and the caulking through hole, There is an effect that a method of manufacturing an electromagnetic relay that facilitates positioning work can be obtained.
[Brief description of the drawings]
FIG. 1 is a front sectional view showing an embodiment of an electromagnetic relay according to the present invention.
FIG. 2 is a side sectional view showing an embodiment of an electromagnetic relay according to the present invention.
FIG. 3 is an exploded perspective view showing a method of assembling the fixed contact terminal and the coil terminal with respect to the base of the electromagnetic relay according to the present invention.
FIG. 4 is an exploded perspective view showing a method for assembling an electromagnet block with respect to a base of an electromagnetic relay according to the present invention.
FIG. 5 is a cross-sectional view of a main part showing a method for assembling the electromagnet block shown in FIG. 4;
FIG. 6 is an exploded perspective view showing a method of assembling a common terminal and a hinge spring for the electromagnet block.
7 shows an assembled state of the hinge spring shown in FIG. 6. FIG. 7 (a) is a perspective view of a main part, and FIG. 7 (b) is a sectional view of the main part.
FIG. 8 is an exploded perspective view showing the positional relationship of the hinge spring with respect to the base of the electromagnetic relay according to the present invention.
9A and 9B are cross-sectional views of an electromagnetic relay according to a conventional example, where FIG. 9A is a left side cross-sectional view and FIG. 9B is a front cross-sectional view.
FIG. 10 is a perspective view showing an electromagnet block of an electromagnetic relay according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Base, 11 ... Projection for position regulation, 11a ... Tapered surface, 11b ... Locking surface, 12 ... Insulating wall for position regulation, 18 ... Jig pin, 20, 21 ... Fixed contact terminal, 20a, 21a ... Fixed Contact, 22 ... Coil terminal, 24 ... Connection, 24a ... Shoulder, 24b ... Through hole, 24c ... Projection, 26 ... Common terminal, 27 ... Connection, 27a ... Notch, 28 ... Tongue piece, 30 ... Electromagnet Blocks 31, 32 ... collars, 33 ... spools, 34 ... coils, 35 ... relay terminals, 35a ... bald parts, 35b, 35c ... through holes, 35d ... lower edge, 36 ... yokes, 37 ... protruding steps 37a, 37b ... projection, 38 ... iron core, 38a ... magnetic pole part, 40 ... hinge spring, 41 ... movable contact piece, 42 ... movable contact, 44 ... movable iron piece, 45a ... taper surface, 45b ... locking edge.

Claims (2)

In the electromagnetic relay that electrically connects the relay terminal provided on the collar portion of the spool of the electromagnetic block placed on the upper surface of the base to the upper end portion of the coil terminal erected on the upper surface of the base,
The common terminal fixed to the yoke of the electromagnet block is press-fitted and fixed to the terminal hole of the base, and a pair of the caulking protrusions protruding from the side surfaces of the upper ends of the pair of coil terminals erected on the upper surface of the base. An electromagnetic relay characterized by fitting through caulking through holes provided in relay terminals, respectively, and positioning and caulking and fixing through positioning through holes provided in the relay terminals and the coil terminals, respectively . In an electromagnetic relay manufacturing method for electrically connecting a relay terminal provided on a collar portion of a spool of an electromagnetic block placed on the upper surface of the base to an upper end portion of a coil terminal erected on the upper surface of the base,
A caulking through-hole provided in the relay terminal is fitted into a caulking protrusion protruding from the upper end side surface of the coil terminal, the upper end side surface of the coil terminal and the relay terminal are joined, and the coil terminal A positioning jig pin is inserted into a positioning through hole provided in the upper end of the positioning terminal and a positioning through hole provided in the relay terminal, and then the caulking protrusion is caulked and fixed. A method for manufacturing an electromagnetic relay.

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