JPS60107229A - Flat relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to flat relays, particularly flat relays for printed circuit board mounting.

[Prior art and its problems]

In general, electric and magnetic relays consist of an electromagnet consisting of a wire coil wound around a spool, an iron core, and a yoke, and the contact mechanism opens and closes using the attractive force of the magnetic field generated by energizing the coil as a driving source. I'm letting you do it. In recent years, there has been a demand for miniaturization, low power consumption, and low gravity, and for this purpose, a permanent magnet is installed in the magnetic circuit IN, and the attractive and repulsive forces between the permanent magnet and the electromagnet are effectively used as contact driving force. Polarized relays are provided. On the other hand, in addition to miniaturization, there is also a desire for a flat relay with a height of 5 mm or less when mounted on a printed circuit board in relation to the height of other devices, especially integrated circuits.

However, in meeting these demands, the large volume of the coil itself poses a problem. For this reason, improvements in the packaging density of the coil and thinning of the coil conductor wire are being considered, but currently these are still technical issues.

There is a cost limit.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a flat relay that is not only small and consumes little power but also has a short profile.

[Structure and effects of the invention]

In order to achieve the above object, the flat relay according to the present invention moves a movable plate made of an insulating thin plate with a flat coil formed of a conductor on at least one surface into a magnetic field generated by a permanent magnet. The movable plate is movably supported by a pair of coil terminals and a tip of a movable contact piece provided in a direction perpendicular to the magnetic field and having spring properties, and the movable plate is moved based on turning on and off of current to the coil. It is characterized by a contact mechanism that opens and closes in conjunction with each other.

That is, the present invention utilizes the electromagnetic force generated according to Fleming's left-hand rule when a current flows through a conductor located perpendicular to the magnetic field as a contact driving force. According to this, since the coil is formed flat on the surface of the insulating thin plate, the volume of the coil itself is greatly reduced, making it possible to create a flat and compact relay, which is highly efficient and reduces power consumption. can be achieved. In addition, since the J moving plate is movably supported by a pair of resilient coil terminals and the tip of the T moving contact piece, it is possible to use a separate dedicated support component or a spring plate for applying a restoring force. The number of parts can be reduced and the assembly process can be simplified.

[Detailed description of the invention]

First, the driving principle of the present invention will be explained with reference to FIGS. 1(al, bl) and FIG. 2.

In FIGS. 1(a) and 1(b), the movable plate 1 is made of an insulating thin plate, and the screen is equipped with coils 2.3 made of conductive material.
is formed into a flat shape. The magnetic circuit consists of permanent magnets 6, 6 with both ends sandwiched by armatures 4.5 and 4', 5'.
', and the movable plate 1 is installed so as to be movable in the direction perpendicular to the magnetic field indicated by the dotted line.

Here, when direct current is applied to the straight parts 2a and 3a of the coils 2 and 3 toward the back of the paper and to the straight parts 2b and 3b of the paper toward the front of the paper, the movable plate 1 moves in the direction of the arrow according to Fleming's left-hand rule. (See Figure 1(b)).

On the other hand, if a direct current is applied, the movable plate 1 will move in the direction opposite to the arrow A. The present invention provides such a movable plate 1
The contact mechanism opens and closes based on the movement of the
The movable plate 1 can be operated in either a latching type, which operates each time the direction of the current is switched, or a single stable type, in which a return force is applied by a spring material and the unit returns when the current is turned off.

In Figure 2, the upper magnetic circuit is composed of an integrated armature 7, in other words, it is a permanent Ill! This is the one in which the i-stone 6 is omitted. According to this, although the magnetic flux density decreases, the same operation as in FIG. 1 can be obtained.

[Explanation of Examples]

In FIG. 3, there are contact mechanisms 20 on both sides of the base 10.
．． 20 is installed, and armatures 19 and 19 with a permanent magnet 18 sandwiched between them are also installed. The contact mechanism 20 is composed of a movable contact provided at the tip of a movable contact piece 21 whose rear end is fixed to a wall 11 formed 1° above the base, and fixed contacts provided at terminals 24a and 24b.

The movable plate 30 is integrally molded with a suitable resin, and has a coil 35 printed with a conductor formed on the upper and lower surfaces, and the movable contact pieces 21 and 21 on the protrusions @a1, 3+ formed on both sides.
The coil terminal 17.17 is fixed to the wall 11 of the base 10 on both sides of the movable plate 30 itself.
By engaging the tip of each movable contact piece 21.2
1. The spring property of the coil terminal 17.17 allows it to move freely in the direction indicated by the arrow and in the opposite direction. Further, coils 35 formed on the upper and lower surfaces of the movable plate 30 are connected to coil terminals 17.17.

The housing block 40 supports armatures 47 and 47 with a permanent magnet 46 sandwiched between them by a frame 41, and by placing protrusions 42 provided at the four corners on the base 12 of the base 10, the movable plate 30 It is mounted on the base 10 via.

That is, the movable plate 30 has armatures of 19.19 and 47.47.
When the flow to the coil 35 is turned off, the spring force applied to the movable contact piece 21 and the coil terminal 17 causes the coil to move in the opposite direction of arrow A. The movable contact is in contact with the fixed contact of the fixed end 'r-24b.

When the current to the coil 35 is turned on, an electromagnetic force perpendicular to the magnetic field generated by the permanent magnet 18, 46 is generated in the coil 35 as described above, the movable plate 30 moves horizontally in the eight directions of the arrow, and the movable contact contacts the fixed terminal. It contacts the fixed contact 24a. When the current is turned off, it returns to its original state.

[Brief explanation of drawings]

FIGS. 1(a) and 2(b) and 2 are explanatory diagrams of the principle of the present invention, and FIG. 3 is an exploded perspective view of a flat relay according to the present invention. 1.30...Movable plate, 2, 3.35...Coil, 4
゜5.7.19.47...Amateur, 6, 18
, 46... Permanent magnet, 17... Coil terminal, 20...
...Contact point 8+, to Ura, 21...Machi moving contact piece. Patent Applicant: Tateishi Electric Co., Ltd. Representative Patent Attorney: Seihaku Hoshi and 2 others Figure 1 (Silver Figure 1 (b)) Figure 2; 7 Drawing Figure 3

Claims (1)

[Claims] (1) A movable plate made of an absolute Kmt% thin plate with a planar coil formed of a conductor on at least one surface is placed in a magnetic field of a permanent 1i stone in a direction perpendicular to this magnetic field, and has spring properties. The movable plate is movably supported by a pair of coil terminals and a tip of a movable contact piece, and the contact mechanism opens and closes in conjunction with the movement of the movable plate based on turning on and off of current to the coil. Features a flat relay.