JPH0723887Y2 - Lead reel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a reed relay, and more particularly to a mounting structure for a reed piece thereof.

Conventional Technology and its Problems Conventionally, as a lead piece mounting structure in a reed relay, for example, as shown in FIGS. 11 and 12, a lead having a uniform width in a through hole 41a provided in a spool 4 of an electromagnet section 3 is used. One end protruding through the piece 23 is used as the movable contact portion 23a, while the protruding other end portion 23b is fixed to the common terminal 33, and a pair of fixed parts are provided so as to face each other with the movable contact portion 23a in between. There is one in which the contact portions 21a and 22a are provided. Then, in this structure, the lead piece 23 swings in the plate thickness direction based on the excitation and demagnetization of the electromagnet portion 3, and the movable contact portion 23a alternately comes into contact with and separates from the fixed contact portions 21a and 22a.

However, in the above-mentioned reed relay, when the lead piece 23 is inserted into the through hole 41a of the spool 4, the lead piece 23 is likely to be displaced in the width direction and the plate thickness direction, so that the tip corner portion of the lead piece 23 is penetrated into the through hole 41a. It was easy to get caught on the inner surface of. In particular, a pair of fixed contact parts provided so as to face each other in advance.
It is not easy to insert the movable contact portion 23a between the portions 21a and 22a, the lead piece 23 may be distorted, and sometimes the contact surface of the movable contact portion 23a may be damaged, which makes insertion work troublesome.

Therefore, in the reed relay described above, first, the spool 4
After projecting the movable contact portion 23a of the lead piece 23 from the through hole 41a, a pair of fixed contact portions 21a and 22a have been provided so as to face each other with the movable contact portion 23a in between. There is a problem that the degree of freedom of work is low and automation of assembly is difficult.

Means for Solving the Problems In order to solve the above problems, the present invention provides a reed relay configured as described above, wherein at least one end of the reed piece has a wide end and the spool penetrates. A pair of guide grooves for guiding both side edges of the wide end of the lead piece is provided in the middle of the hole.

Therefore, according to the present invention, the pair of guide grooves provided in the middle portion of the through hole of the spool allows the lead piece to pass through the through hole when the lead piece is inserted into both side edge portions of the wide end of the lead piece. Will guide you.

Therefore, since the wide end of the lead piece is guided not only in the width direction but also in the plate thickness direction, the wide end of the lead piece is not caught on the inner peripheral surface of the through hole. As a result, since the lead pieces are not distorted, the assembly work is easy,
Workability is improved.

Particularly, when the movable contact portion located at one end of the lead piece is a wide end portion, both side edge portions of the movable contact portion are guided in the width direction and the plate thickness direction by the pair of guide grooves,
The movable contact portion of the lead piece can be easily provided between the pair of opposed fixed contact portions without damaging the contact surface of the movable contact portion, and
Can be accurately inserted and positioned. For this reason, since the pair of fixed contacts can be provided so as to face each other in advance, the degree of freedom of work is increased and the assembly can be automated.

Moreover, if the movable contact portion of the lead piece has a wide end, the contact area is widened, so that the contact reliability is increased and the magnetic resistance is reduced to improve the magnetic efficiency, while the heat radiation amount from the lead piece is reduced. As it increases, the service life is extended.

Further, according to the present invention, both side edges of the wide end of the lead piece are directly guided by the pair of guide grooves provided in the through hole, and other components are not required, so that the structure is simple, The advantage is that the manufacturing of the component parts is simple.

Embodiment An embodiment according to the present invention will be described below with reference to the accompanying drawings of FIGS. 1 to 10.

The reed relay according to the present embodiment generally includes a base 1 and
It is composed of a reed relay body 2, an insulating sheet 8, and a substantially box-shaped case cover 9 (FIG. 4).

The base 1 has a recess 11 in the center of the upper surface thereof, on which the reed relay body 2 can be mounted and fixed, and an insulating wall at the upper surface edge.
While protruding 12, the insulating barrier 13 is protruded at the lower surface edge, and a thin box-shaped local dismantling portion 14 is formed in the center of the lower surface (FIG. 9). This local dismantling section 14 is
If this part is removed at the time of failure, the opening communicates with a groove 43a provided in the collar 43 of the spool 4 described later, and the welding of contacts, the measurement of the breaking force, the locking, the stick using a tension gauge or the like. It is possible to investigate failure modes such as. Further, as shown in FIG. 1, the electrostatic shield terminal 15 is press-fitted into the base 1 in advance.

The reed relay body 2 has an electromagnet section 3 and fixed contact terminals 21 and 2
2, a lead piece 23, and permanent magnets 24, 25.

The electromagnet part 3 is formed by winding a coil 31a made of a bare copper wire for electrostatic shield as a first layer on the body part 41 of the spool 4 having flanges 42, 43 at both ends and then winding the coil 31b. is there.

The collar portion 42 is provided with pedestal portions 44, 45 so as to face each other, and one pedestal portion 44 is provided with a relay protrusion 44a protruding from the lead wire of the coil 31a for connection. The other pedestal portion 45 is press-fitted with the coil terminal 32 to which the lead wire of the coil 31b is twisted and connected. Then, a substantially L-shaped common terminal 33 is bridged by insert molding on the pedestals 44 and 45.

On the other hand, the collar portion 43 is provided with a positioning arm portion 46 and a pedestal portion 47 so as to face each other, and the pedestal portion 47 is press-fitted with a coil terminal 34 for connecting the lead wire of the coil 31b. .

Further, an opening portion of a through hole 41a penetrating the body portion 41 is located at the center of the outer surface of the collar portion 43, and a surveying groove 43a is provided above and below this opening portion, and the left and right sides of the opening portion are provided. A pair of spacers 43b, 43b are projectingly provided on the. This spacing element 43b, 43b
Has the same width dimension as the contact distance.

The fixed contact terminal 21 is made of a bent conductive member, and the side portion of the vertically arranged fixed contact portion 21a is bent horizontally to form a horizontal portion 21b, while the side end portion of the fixed contact portion 21a is moved downward. It is bent to form the terminal portion 21c. Then, the fixed contact terminal 21 is fitted with the fitting holes 21d, 21d provided in the fixed contact portion 21a into a pair of caulking projections 48a, 48a projecting from the outer surface of the collar portion 43 (Fig. 8). ), Is fixed by heat caulking or laser welding.

The fixed contact terminal 22 is made of a bent conductive member, and the side portion of the horizontally arranged horizontal portion 22b is bent at a right angle to form the fixed contact portion 22a, while the side end portion of the horizontal portion 22b is bent downward. And is used as the terminal portion 22c. The fixed contact terminal 22 has a pair of caulking protrusions 48b, 48b in which the fitting holes 22d, 22d (Fig. 8) provided in the fixed contact portion 22a are provided on the outer surface of the collar portion 43.
After it has been fitted to, it is fixed by heat caulking or laser welding.

Since the fixed contact terminals 21 and 22 are accurately positioned by contacting the pair of spacers 43b and 43b provided on the flange 43, the fixed contact terminals 21a are fixed to the flange 43 by thermal caulking or the like. , 22a
There is an advantage that the accuracy of the contact distance is high.

The lead piece 23 is made of a conductive leaf spring and has a wide movable contact portion 23a provided at one end thereof from the side of the collar portion 42 to the spool 4
While being inserted into the through hole 41a of the common contact 33 and protruding between the fixed contact portions 21a and 22a, the remaining end 23b is fixed to the horizontal portion 33a of the common terminal 33 (FIGS. 6 and 7).

As a method of inserting the lead piece 23, for example, as shown in FIGS. 1 to 3, the wide movable contact portion 23a of the lead piece 23 is inserted into the through hole 41a of the spool 4 from the flange portion 42 side. , Both side edges of the movable contact portion 23a are fitted into a pair of guide grooves 41b, 41b provided in the intermediate portion of the through hole 41a and slid,
There is a method of projecting the movable contact portion 23a from the flange portion 43 side and positioning it between the fixed contact portions 21a and 22a. Note that FIGS. 1 to 3 are simplified drawings for convenience of explanation.

The permanent magnets 24, 25 have different energy densities, and the permanent magnet 24 is made of a material having a strong holding force, for example, a rare earth magnet containing samarium or cobalt, while the permanent magnet 25 is made of a material having a weak holding force, for example, chrome and It is composed of a ferrite magnet containing cobalt or strontium.
The permanent magnets 24 and 25 are the horizontal portions 2 of the fixed contact terminal 21.
It is attached to 1b.

In the reed relay main body 2 having the above-mentioned configuration, the coil terminals 32 and 34, the common terminal 33, and the fixed contact terminals 21 and 22 are press-fitted into the base 1 to form the recess 11 provided in the center of the upper surface of the base 1. It will be installed. At this time, the relay protrusion 44a of the spool 4 is adjacent to the electrostatic shield terminal 15. The relay protrusion 44a and the electrostatic shield terminal 15 are electrically connected by a conductive adhesive or soldering.

The insulating sheet 8 insulates between the reed relay body 2 and the case cover 9, and is attached inside the case cover 9.

The case cover 9 is made of a magnetic metal material, constitutes a part of the magnetic circuit of the reed relay, and has a magnetic shield function. The case cover 9 has a retaining protrusion on the inner edge of the opening.
91 is set appropriately.

Therefore, the case cover 9 is inserted through the insulating sheet 8,
If it is fitted to the base 1 equipped with the reed relay body 2,
The retaining projections 91 are locked to the lower surface edge of the base 1, and thereafter, a sealing agent (not shown) is injected and solidified to complete the assembling work.

According to this embodiment, the insulating barrier 13 is provided so as to project from between the opening edge portion of the case cover 9 and the fixed contact terminals 21, 22 and the like, so that there is an advantage that a sufficient insulating distance can be secured.

Further, when the seal material is injected into the recess formed by fitting the case cover 9 to the base 1 and sealing is performed at a high temperature, the stress of the bent insulating sheet 8 is relieved, and the force of pushing up the case cover 9 acts. However, the retaining projection 91 is locked to the lower surface edge of the base 1 to prevent the case cover 9 from retaining, which is advantageous in that the sealing work can be performed smoothly.

Further, in this embodiment, since the permanent magnet 25 is composed of one having a weak holding force, the permanent magnet 25 is mainly demagnetized and adjusted. Since the permanent magnet 25 has a weak holding force, there is an advantage that delicate demagnetization adjustment can be easily performed.

Next, the basic operation of the reed relay is, as shown in FIG. 10, when the coil 31b is unexcited, the magnetic flux flowing out from the N poles of the permanent magnets 24, 25 is caused by the case cover 9 made of a magnetic metal material. To the end 23b of the lead piece 23, and the movable contact 23a returns to the S pole of the permanent magnets 24, 25 through the fixed contact 21a of the fixed contact terminal 21 to which the movable contact 23a is adsorbed, thereby closing the magnetic circuit. is doing.

Then, the coil 31b is made to flow in the direction opposite to the magnetic flux.
When excited, the movable contact portion 23a of the lead piece 23 repels the fixed contact portion 21a and separates, and then is attracted to the fixed contact portion 22a,
The contact switches.

[Brief description of drawings]

1 to 10 show an embodiment of the present invention,
1 and 2 are a plan sectional view and a front view of the main part, FIG. 3 is a right side view of the main part, FIG. 4 is an exploded perspective view, and FIG.
The figure is a front sectional view, FIG. 6 is a plan sectional view, FIG. 7 is a left side sectional view, FIG. 8 is a right side sectional view, FIG.
FIG. 11 is an operation explanatory view, and FIGS. 11 and 12 are a front sectional view and a plan sectional view showing an embodiment of a conventional example. 3 ... Electromagnet part, 4 ... Spool, 21a, 22a ... Fixed contact part, 2
3 ... Lead piece, 23a ... Movable contact part, 41a ... Through hole, 41b ... Guide groove.

Claims (2)

[Scope of utility model registration request] 1. A lead piece is inserted through a through hole provided in a spool of an electromagnet section, and one end of the projecting lead piece is used as a movable contact portion, and the movable contact portion is interposed so as to face each other. A pair of fixed contact parts is provided in the reed relay that swings the lead piece in the plate thickness direction based on the excitation and demagnetization of the electromagnet part, and alternately moves the movable contact part to and from the fixed contact part. At least one end of the lead piece has a wide end, and a pair of guide grooves for guiding both side edges of the wide end of the lead piece is provided in an intermediate portion of the through hole of the spool. Reed relay characterized by that. 2. The reed relay according to claim 1, wherein the movable contact portion of the reed piece is a wide end portion.