JPS639089Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a reed relay.

The reed relay that forms the basis of this invention is shown in Figures 1 to 3. That is, in this reed relay, the common terminal 4 and the coil terminal 5 are implanted and suspended from the flanges 2 and 3 of the coil frame 1 by insert molding, and the coil 1' is wound around the coil frame 1 and inserted into the terminal insertion hole 6a of the base 6. The common terminal 4 and the coil terminal 5 are passed through, and the coil frame 1 is installed on the base 6. Floating portion 7 from the flange 2 of the terminal plate 7 located at the opening of the flange 2 and integrally formed with the common terminal 4
One end of the lead 8 is welded to the coil frame 1, and the tip of the lead 8 is positioned in the opening of the flange 3. At the flange 3, a normally open magnetic pole plate 9 and a normally closed magnetic pole plate 10 face each other in the direction of deflection of the lead 8 with the tip of the lead 8 in between. These magnetic pole plates 9 and 10 are press-fitted and fixed through the guide groove 3a, and their contacts 9a and 10a are connected to the flange 3.
Terminals 9b and 10b, which are positioned above and below the spacer 3b that protrudes from the top and bottom of the lead 8 and extend from the magnetic pole plates 9 and 10, are vertically installed below the base 6 through the terminal insertion holes 6a. do. Further, a permanent magnet 11 is adhesively fixed between the magnetic pole plates 9 and 10 and biased on the normally closed magnetic pole plate 10, and the front side of the permanent magnet 11 is positioned on the tip side of the spacer 3b. Furthermore, the entire coil frame 1 is covered with a magnetic metal cover 1.
2 and sealed and fixed to the base 6 together with the coil frame 1. 13 is a terminal for coil winding, 14 is a protruding piece for hanging the coil end on the shoulder, 15 is a projection for press-fitting, and 16 is an adhesive sealant applied from the back side of the base 6 to the terminal insertion hole 6a.
At the same time, the guide hole 17 fills the gap with the pouring cover 12, and 17 is an air vent hole in the base 6.

This reed relay has a permanent magnet 11 when not energized.
The tip of the lead 8 is attracted to the normally closed magnetic pole plate 10 to electrically connect the common terminal 4 and the terminal 10b, and by energizing the coil 1', magnetic flux is passed through the lead 8, and the permanent magnet 11 The tip of the lead 8 is attracted to the contact 9a on the normally open side by applying an opposite magnetic flux of
Common terminal 4 and terminal 9b are electrically connected.

The reed relay described above is a monostable operation type, but if the permanent magnets 11 are provided at equal intervals between the magnetic pole plates 9 and 10, it becomes bistable operation.

However, in this reed relay, after the relay body is installed on the base 6, the characteristics are calibrated by hanging the torsion adjustment rod 18 on the base end of the lead 8 and the common terminal plate 7 and plastically deforming it as shown by the arrow. Since the cover 12 is put on and sealed with adhesive, the operating characteristic values of the relay after assembly are likely to fluctuate due to shrinkage force when the adhesive hardens or stress relaxation due to heating, etc., and there is a risk that the defective product rate will be high. It was hot.

Therefore, it is an object of this invention to provide a reed relay in which a characteristic calibration process can be performed after assembly is completed.

An embodiment of this invention is shown in FIGS. 4 and 5. That is, in this reed relay, a terminal plate 7 having a floating portion is fixed to one end of a coil frame 1, and the base end of a strip-shaped lead 8 passed through the coil frame 1 is fixed to the floating portion of the terminal plate 7. Magnetic pole plates 9 and 10 are provided at the other end of the coil frame 1 and facing the free end of the lead 8.
A relay body A having a coil 1' wound around the outer circumference of the relay body A;
It has a first characteristic calibration hole 20 which supports the relay main body A and into which a pin 25 is inserted which is formed at a position facing the base end of the lead 8 in the plate thickness direction and presses and deforms the terminal plate 7. base 19
It is attached to this base 19 and covers the relay main body A, and is located on the opposite side with the first characteristic calibration hole 20 and the base end of the lead 8 in between, and presses the terminal plate 7. Deforming pin 25'
The cover 21 has a second characteristic calibration hole 20' into which the second characteristic calibration hole 20' is inserted.

Both end portions of the terminal plate 7 are simultaneously molded onto the coil frame 1, and the center portion becomes a floating portion. This allows plastic deformation by pushing the central part in the thickness direction. Further, a common terminal 4 protrudes from one end thereof.

The first characteristic calibration hole 20 also serves as a secondary seal hole.

The cover 21 is an inner cover made of plastic, and an outer cover 1 for magnetic shielding is attached to this.
1 is coated. Further, a recess 22 is formed on the outer surface of the outer corner of the inner cover 21, a through hole 23 is formed at the bottom, and a ground terminal 24 is formed on the outer cover 12.
By providing the outer cover 12 and covering the inner cover 21, the ground terminal 24 is made to pass through the recess 22 and the through hole 23.

To assemble this reed relay, install the relay main body A on the base 19, cover it with the inner cover 21, and
Next seal. In this state, check the characteristics,
If necessary, pins 25 and 25' are inserted through the characteristic calibration holes 20 and 20', and the terminal plate 7 at the base end of the lead 8 is pressed to plastically deform and calibrate. In this case, adjusting the pin 25 will bring the tip of the lead 8 closer to the magnetic pole plate 9, and the pin 2
When calibrated at 5', it will be brought closer to the magnetic pole plate 10 side.

After characteristic calibration, the characteristic calibration holes 20, 20' are secondarily sealed, and the outer cover 12 is placed over the inner cover 21 and bonded.

With this configuration, the characteristics can be calibrated after sealing the relay main body A with the inner cover 21, so that the yield can be improved compared to the conventional method, and the withstand voltage with respect to the outer cover 12 can be improved by the inner cover 21.

As described above, in the reed relay of this invention, a terminal plate having a floating portion is fixed to one end of the coil frame, and the base end of the strip-shaped lead passed through the coil frame is connected to the floating portion of the terminal plate. a relay body which is connected to the coil frame and has a magnetic pole plate facing the free end of the lead at the other end of the coil frame and a coil wound around the outer periphery of the coil frame; a base having a first characteristic calibration hole formed at a position facing the base end in the plate thickness direction and into which a pin for pushing and deforming the terminal plate is inserted; and a base that is attached to the base and covers the relay body. and a second pin located on the opposite side between the first characteristic calibration hole and the base end of the lead, into which a pin is inserted that presses and deforms the terminal board.
Because it is equipped with a cover with a hole for characteristic calibration,
It has the following effects.

That is, since the first characteristic calibration hole was formed in the base and the second characteristic calibration hole was formed in the cover,
Characteristics can be calibrated after covering the relay body attached to the base with a cover, thus preventing the operating characteristics of the reed relay from changing during the assembly process after characteristic calibration as in the past. . Moreover, the adjustment can be made simply by pushing the pin in the insertion direction, making calibration easy.

The disclosed technology is shown in FIGS. 6 to 10 below. In other words, this reed relay has coil frame 1
Vertical grooves 26, 26' are formed on the inner surface of the flange 2, and adjustment chips 27, 27' are slidably inserted into the vertical grooves 26, 26'. The adjustment chips 27, 27' are provided with tapered protrusions 28, 28' on the lead 8 side, and cylindrical protrusions 29, 29' on the opposite side. Holes 30, 30' are formed in the base 6 and cover 12, and the cylindrical projections 29, 29' are fitted therein.

Further, as shown in FIG. 8, the tip of the lead 8 is formed into a three-pronged shape, and a contact 31a is fixed to the central piece to form an electrical contact part 31, and the other two pieces form a magnetic pole part 32. Opposing magnetic pole plates 9, 1
A contact point 33 is provided at 0.

The other parts are the same as those in FIGS. 1 to 3.

To calibrate the characteristics of this reed relay, the cover 12 is sealed and the protrusions 29 and 2 formed in the holes 30 and 30' are
This is done by plastically deforming the common terminal plate 7 by pressing 9'.

With this configuration, it is possible to improve the yield and have the following effects. That is, (1) Since the adjusting tips 27, 27' are guided in the grooves 26, 26' formed in the flange 2, the positioning accuracy of the adjusting tips 27, 27' with respect to the common terminal plate 7 is accurate, and the common terminal plate 7, the part that is easiest to adjust can be efficiently and stably transformed.

(2) It is advantageous because no separate parts are required to shield the adjustment holes 30, 30'.

(3) Since the tip of the lead 8 is divided to separate the magnetic pole part 32 and the electrical contact part 31, the impression voltage, open circuit voltage, and There was no longer any change in characteristics such as contact resistance. That is, even if the contact portion 31 is worn out due to open contact, the wear of the magnetic pole portion 32 is small, so there is no change in the magnetic attraction force, and therefore the characteristics do not change. Furthermore, when the contact portion 31 wears out, its center piece approaches the magnetic pole plate, so the magnetic attraction force to the center piece increases, making it possible to compensate for the drop in contact pressure caused by the wear of the contact. Furthermore, since a general electrical contact material can be used for the contact 31a of the contact portion 31 without relying on fitting, the load capacity is improved.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of the reed relay that is the basis of this invention, Figure 2 is its sectional view, Figure 3 is a partially cutaway perspective view of the reed relay, and Figure 4 is the first embodiment of this invention. 5 is a sectional view thereof, FIG. 6 is an exploded perspective view of essential parts of the disclosed technology, FIG. 7 is a sectional view of the reed relay, FIG. 8 is a perspective view of the tip of the reed, and FIG. 9 is an exploded perspective view of the reed relay. The figure is a sectional view thereof, and FIG. 10 is a sectional view taken along the line of FIG. 8. 1... Coil frame, 1'... Coil, 7... Terminal plate, 8... Lead, 9, 10... Magnetic pole plate, 19...
... Base, 20 ... First characteristic calibration hole, 20'
...Second characteristic calibration hole, 21...Cover, 2
5, 25'...Pin, A...Relay body.

Claims (1)

[Scope of utility model registration request] A terminal plate having a floating part is fixed to one end of the coil frame, the base end of a strip-like lead passed through the coil frame is connected to the floating part of the terminal plate, and the other end of the coil frame is connected to the terminal plate. A relay body having a magnetic pole plate facing the free end of the lead and having a coil wound around the outer periphery of the coil frame; a base having a first characteristic calibration hole into which a pin is inserted which presses and deforms the terminal plate; a base that is attached to the base and covers the relay body; the first characteristic calibration hole and the lead; and a cover having a second characteristic calibration hole located on the opposite side with the base end thereof in between and into which a pin for pushing and deforming the terminal board is inserted.