JPS6346530B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polarized reed relay.

[Conventional technology]

In general, a polarized reed relay consists of a lead with a movable contact, a fixed contact, an excitation coil wound around the lead, and a permanent magnet that excites the movable and fixed contacts. A lead has both electric and magnetic properties, and
The contact gap is characterized by providing electrical insulation between the contacts and forming a gap in the magnetic circuit.

The structure of a conventional polarized reed relay having such a function is shown in FIGS. 1 to 5. In other words, this polarized reed relay is
The coil frame, the lead holding part that holds the lead fixing part provided at one end, and the magnet holding part that holds the permanent magnet provided at the other end are each divided into two parts to form half coil frames 1a, 1b and half lead holding parts 2a, 2b. , half magnet holding parts 3a and 3b are formed, and these halves are individually molded to form halves A and B, each of which has a coil conductor winding part 4, a coil terminal 5, and an output terminal 6. The lead fixing part 7' having the L-shaped magnetic pole parts 8a, 8b and the common terminal 7 is insert-molded, the fixed contacts 9a, 9b are joined to the opposing terminals of the L-shaped magnetic pole parts 8a, 8b, and the base end of the lead 10 is attached to the lead. The permanent magnet 3 is fixed to the fixed part 7' so as to face the half-coil frame 1b, and the permanent magnet 3 is loaded into the half-magnet holding part 3b.
Next, the halves A and B are joined together, the coil 11 is wound around the coil frame, and the coil frame is further covered with an iron cover 12 and a bottom cover 13. Note that 14 is a fitting portion between halves A and B, 15 is a coil relay terminal, and 16 is a relay terminal fixing groove.

[Problem to be solved by the invention]

However, in this polarized reed relay, when the fixed contacts 9a, 9b are bonded to the L-shaped magnetic pole parts 8a, 8b, the fixed contacts 9a, 9b are warped during manufacture and due to balance differences in bonding pressure, etc. 9a,
9b was prone to tilt in its length direction (arrow C in Figure 1). Further, slight warpage was formed on the opposing surfaces of the halves A and B, and on the joining surfaces of the half coil frames 1a and 1b. As a result, the contact gap accuracy, which is originally determined by the molding accuracy of halves A and B and the fixed contact manufacturing accuracy, is affected by these, resulting in variations in accuracy.
This results in variations in magnetic attraction force characteristics, variations in normally closed/normally open contact pressure, etc., which increases the difficulty in setting the touching voltage and open voltage, and also reduces contact life and increases contact bounce. Furthermore, since the coil 11 is wound and soldered after the fixed contacts 9a and 9b are installed, solder flux adheres to the contact surfaces of the fixed contacts 9a and 9b, making the contact resistance unstable.

In contrast, a spacer is provided on the coil frame to determine the contact gap, and fixed contacts 9 are placed on both sides of the spacer.
A structure in which a and 9b are positioned has been considered (for example, Japanese Patent Application Laid-Open No. 52-118554 and Japanese Utility Model Application No. 52-151344).
However, in this conventional method, the fixed contact is inserted along the surface of the spacer, so the spacer is scraped, and the scraped powder causes contact failure and makes the contact gap unstable. High accuracy cannot be obtained due to the slope. Furthermore, since the spacing between the magnetic pole plates integrally formed with the fixed contact varies, the magnetic characteristics become unstable. Another drawback was that the parallelism between the fixed contact and the movable contact was insufficient.

Therefore, an object of the present invention is to provide a polarized reed relay that can stabilize the contact gap and stabilize the electrical and magnetic characteristics.

[Means to solve the problem]

The polarized reed relay of this invention includes a lead,
a lead fixing part that fixes the proximal end of the lead;
a pair of contact blocks having a pair of fixed contacts facing each other in the plate thickness direction in which the lead operates with the tip of the lead in between; and a pair of contact blocks interposed between these contact blocks to provide magnetic poles to the fixed contacts. a permanent magnet, a lead insertion part for inserting the lead in the intermediate part, a lead holding part for holding the lead fixing part at one end, and a block holding part for holding the contact block and the permanent magnet. a coil frame at the other end, a fixed contact insertion groove is formed in the block holding portion for inserting both side portions of the pair of fixed contacts in the thickness direction of the lead, and a groove is formed between the pair of fixed contacts. The fixed contact insertion groove is characterized in that a spacer is formed in the fixed contact insertion groove to determine the contact gap amount.

[Effect]

According to the structure of the present invention, since the spacer is formed in the fixed contact insertion groove into which both sides of the fixed contact are inserted, each fixed contact of the pair of contact blocks is inserted from the front on the surface of the spacer along the fixed contact insertion groove. abutting,
Unlike conventional methods, the surface of the spacer is not scraped, so there is no contact failure due to scraped powder, and more accurate contact spacing can be achieved.The spacer is formed at the butt part of the mold, which reduces the draft angle. Since it is not affected, the accuracy of the contact spacing can be improved. Furthermore, by positioning the lead fixing part held by the lead holding part at the butt part of the mold, the parallelism between the spacer and the lead fixing part can be made very precisely, so the lead with the movable contact The inclination between the tip and the fixed contact can also be almost completely eliminated. Furthermore, since the spacing between the contact blocks becomes highly accurate, the magnetic properties of the permanent magnets interposed therebetween are stable without variation. Therefore, the contact gap and the electrical/magnetic characteristics can be stabilized.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 6 to 11. That is, in this polarized reed relay, the lead 10, the lead fixing part 23 that fixes the base end of the lead 10, and the distal end of the lead 10 are arranged so as to be opposite to each other in the plate thickness direction in which the lead 10 operates. A pair of contact blocks 21a, 21b having a pair of fixed contacts 19a, 19b, a permanent magnet 3 interposed between these contact blocks 21a, 21b to provide magnetic poles to the fixed contacts 19a, 19b, and a lead 10. Lead insertion part 2 to be inserted
0 in the middle part, a lead holding part 23a holding a lead fixing part 23 at one end, and a block holding part 22 holding contact blocks 21a, 21b and a permanent magnet 3 at the other end.
7, a fixed contact insertion groove 24 is formed in the block holding portion 22 for inserting both ends of the pair of fixed contacts 19a, 19b in the thickness direction of the lead 10, and a A spacer 18 for determining the amount of contact gap is formed in the fixed contact insertion groove 24.

The coil frame 17 has a lead insertion portion 20 formed into a U-shape in cross section. Therefore, the lead 10 can be easily installed, the work of joining the halves together and the number of parts can be reduced, and the coil frame 17 can be easily installed.
After the coil 11 is wound and soldered, the lead 10 and the fixed contacts 19a, 19b can be assembled, which prevents solder flux from adhering to the contact surfaces of the fixed contacts 19a, 19b, and stabilizes the contact resistance of the contacts. can.

The fixed contacts 19a, 19b are connected to the output terminal 6'
Contact blocks 21a, 21 formed of flat plates with
b integrally or by electric resistance welding or laser welding, and by installing the contact blocks 21a and 21b on the contact block positioning surface 26 of the block holding part 22 with adhesive or heat caulking, both ends of the fixed contacts 19a and 19b are fixed. is inserted into the fixed contact insertion groove 24 and positioned by the spacer 18. This simplifies the assembly work of the polarized reed relay.

In the figure, 4 is a coil conductor winding part, 5 is a coil terminal, 6' is an output terminal formed integrally with the contact blocks 21a and 21b, and 7 is a lead fixing part 2.
12 is an iron cover, 13 is a bottom cover, 25 is a magnet insertion part, 27 is a ground terminal, and 28 is a contact part that is electrically connected to the ground terminal 27 and comes into contact with the cover 12.

The integrally molded parts of this polarized reed relay are a coil frame 17, a lead holding part 23, a block holding part 22, a spacer 18, a fixed contact insertion groove 24,
Magnet insertion part 25 and contact block positioning surface 2
Contains 6. The insert molded portions include a coil conductor winding portion 4, a coil terminal 5, a lead fixing portion 23 having a common terminal 7, a ground terminal 27, and a contact portion 28.

According to this embodiment, fixed contacts 19a, 19b
Since the spacer 18 is formed in the fixed contact insertion groove 24 into which both sides of the contact block 2 are inserted, the pair of contact blocks 2
Each of the fixed contacts 19a and 19b of 1 and 21b abuts the surface of the spacer 18 from the front along the fixed contact insertion groove 24, and since the surface of the spacer 18 is not scraped as in the conventional case, the contacts are formed by ground powder. It is possible to realize a more accurate contact spacing without any obstruction, and since the spacer 18 is formed at the abutting portion of the mold and is not affected by draft angle, the contact spacing accuracy can be increased. Furthermore, the lead holding part 23a
The parallelism between the spacer 18 and the lead fixing part 23 can be made very precise by positioning the lead fixing part 23 held by the mold at the abutting part of the mold.
It is also possible to almost completely eliminate the inclination between the tip of the contact and the fixed contacts 19a, 19b. Also spacer 1
8, the spacing between the contact blocks becomes highly accurate, so that the magnetic properties of the permanent magnet 3 interposed therebetween are stable without variation. Therefore,
The contact gap and electrical/magnetic characteristics can be stabilized.

In addition, in this polarized reed relay, the contact blocks 21a and 21b are not insert-molded, so the insert-molded metal fittings such as the coil conductor winding part 4 are simpler than in the past, and molding burrs are also less likely to occur. It is easy to block, and the partial plating of the contacts is also simplified, making it possible to reduce the overall cost.

In addition, when there is one fixed contact 19a, 19b,
One fixed contact is simply a stator that creates a contact gap.

〔Effect of the invention〕

According to the polarized reed relay of the present invention, since the spacer is formed in the fixed contact insertion groove into which both sides of the fixed contact are inserted, each fixed contact of the pair of contact blocks is inserted into the spacer along the fixed contact insertion groove. Since it comes into contact with the surface from the front and does not scrape the surface of the spacer like in the past, there is no contact failure due to scraped powder, and more accurate contact spacing can be achieved. The contact spacing accuracy can be improved because it is formed in the area and is not affected by the draft angle. Furthermore, by positioning the lead fixing part held by the lead holding part at the abutting part of the mold, the parallelism between the spacer and the lead fixing part can be made very precise, allowing the lead with the movable contact to be The inclination between the tip and the fixed contact can also be almost completely eliminated. Furthermore, since the spacing between the contact blocks becomes highly accurate, the magnetic properties of the permanent magnets interposed therebetween are stable without variation. Therefore, there is an effect that the contact gap and the electric/magnetic characteristics can be stabilized.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional polarized reed relay, Figure 2 is its horizontal sectional view, and Figure 3 is its -
4 is a sectional view taken along the line taken from FIG. 2, FIG. 5 is a vertical sectional view of a polarized reed relay, FIG. 6 is an exploded perspective view of an embodiment of the present invention, and FIG. Horizontal sectional view, Fig. 8 is a - line sectional view, Fig. 9
The figures are a sectional view taken along the line of FIG. 7, FIG. 10 a longitudinal sectional view of the polarized reed relay, and FIG. 11 a half sectional view taken along the line XI-XI. 3... Permanent magnet, 10... Lead, 10a...
Tip part, 17...Coil frame, 18...Spacer, 1
9a, 19b...Fixed contact, 20...Lead insertion part, 21a, 21b...Contact block, 22...
Block holding part, 23...Lead fixing part, 23a
...Lead holding part, 24...Fixed contact insertion groove.

Claims (1)

[Claims] 1. A lead, a lead fixing part that fixes the base end of the lead, and a pair of contact blocks having a pair of fixed contacts facing each other in the thickness direction of the plate in which the lead operates, with the tip of the lead in between. , a permanent magnet interposed between these contact blocks to impart a magnetic pole to the fixed contact, a lead insertion part for inserting the lead into the intermediate part, and a lead holding part for holding the lead fixing part at one end. and a coil frame having a block holding part at the other end for holding the contact block and the permanent magnet, and the coil frame has both side parts of the pair of fixed contacts in the block holding part in the thickness direction of the lead. A polarized reed relay characterized in that a fixed contact insertion groove is formed into which the fixed contact is inserted, and a spacer is formed in the fixed contact insertion groove to determine a contact gap amount between the pair of fixed contacts.