KR20070107243A - Latch type miniature relay - Google Patents

Abstract

The present invention relates to a latch-type small relay using a permanent magnet, comprising a permanent magnet plated with a conductor to be moved up and down along a through hole formed in the guide member, and at the same time the relay contact by the vertical movement of the permanent magnet The present invention relates to a small relay of a latch type which is provided with iron plates on the upper and lower sides, and is kept on / off by the magnetism of the permanent magnet itself even when power supply such as a power failure is interrupted.

The present invention provides a latch-type small relay using a permanent magnet, comprising: a PCB substrate and a coil having a polarity determined according to a direction of a current flowing on the upper surface of the PCB substrate; A guide member having a through-hole formed therein for guiding the permanent magnet up and down; A permanent magnet inserted into the through hole of the guide member and vertically moving according to the polarity of the coil; And a relay contact provided on an upper surface of the guide member and contacted on / off by the permanently moving permanent magnet, wherein the permanent magnet moves up and down along the through hole of the guide member according to the polarity of the coil. Disclosed is a latch-type miniature relay, which is turned on / off.

According to the present invention, by proposing a relay having a simple structure as compared with a conventional relay, it is possible to reduce the manufacturing cost by simplifying the process and simplifying the volume, and also the permanent magnet itself plated with a conductor is moved up and down. By configuring the circuit to be turned on and off, the application of the main wiring board, etc., in particular, even when the power supply is interrupted, the permanent magnet is maintained as it is, provides a latch-type relay that does not cause a change in the switch value.

Description

Latch-type small relay {LATCH-TYPE RELAY}

1 is a perspective view showing a relay according to an embodiment of the present invention.

2 is an exploded perspective view showing a relay according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: PCB substrate 20: coil

30: guide member 32: through hole

40: permanent magnet 50: relay contact

60: plate 70a, 70b: upper and lower iron plates

The present invention relates to a latch-type small relay using a permanent magnet, comprising a permanent magnet plated with a conductor to be moved up and down along a through hole formed in the guide member, and at the same time the relay contact by the vertical movement of the permanent magnet The present invention relates to a small relay of a latch type which is provided with iron plates on the upper and lower sides, and is kept on / off by the magnetism of the permanent magnet itself even when power supply such as a power failure is interrupted.

In general, a relay is a device that turns on or off a contact point of a switch by using a property of becoming a magnet when a current flows through a coil. The relay is connected to a conductor by a magnetic field formed by the power applied to the coil and the direction of the current flowing through the coil. This structure is to turn on / off the contact part of the switch. Looking at the operation of the relay, when the power is applied to both ends of the coil, the coil is wound around the center of the coil, the magnetic field is formed, the polarity of the north pole and the south pole according to the direction of application of the current, the polarity Accordingly, the conductor is moved to turn on / off the contact point of the switch unit.

Conventional relays, as disclosed in Korean Patent No. 4963 and Utility Model No. 292167, wind the coil in the bobbin and then use the electromagnetic force of the bobbin to turn on the contact, in particular springs and / or Or most of the structure using the lever. Such a conventional structure requires a device of a complicated structure for the on / off operation of a simple contact, and as a result there is a problem that the bulky process is complicated. Therefore, the conventional relay has a high manufacturing cost, and there are many spatial constraints in utilizing the system. In particular, the main distribution board requires a special purpose small relay that can switch the telephone line, it is possible to reduce the number of relays used in the main distribution board, it is necessary to develop a latch type relay that does not change the value of the switch in the event of a power failure. However, in the conventional relay, when the power supply is interrupted due to a power failure, the coil loses electromagnetic force and the switch value is changed so that the latch function cannot be properly performed.

Therefore, the present inventors maintain the upper and lower points even when the power is cut off by using a permanent magnet plated with a conductor so that the switch value is not changed, and the manufacturing cost is greatly reduced by simplifying the process compared to the conventional process, and furthermore, the volume is reduced. It has led to the development of a latch-type relay that can be applied to MDF, exchange, and various communication terminals by miniaturizing it.

The present invention has been made to solve the above problems, the present invention proposes a relay of a simple structure compared to the conventional relay to provide a relay that can reduce the manufacturing cost by greatly reducing the volume and simplify the process. It is for that purpose.

In addition, the present invention is configured so that the permanent magnet itself plated with a conductor can be moved up and down to turn on and off the contact, in particular, even when the power supply is cut off when applied to the main wiring board, the permanent magnet is maintained as it is to change the value of the switch It is an object of the present invention to provide a relay of a latch type that does not cause an error.

One embodiment of the present invention for achieving the above object is a latch-type miniature relay using a permanent magnet, the PCB and a coil having a polarity is determined in accordance with the direction of the current flowing in the upper surface of the PCB substrate; A guide member having a through-hole formed therein for guiding the permanent magnet up and down; A permanent magnet inserted into the through hole of the guide member and vertically moving according to the polarity of the coil; And a relay contact provided on an upper surface of the guide member and contacted on / off by the permanently moving permanent magnet, wherein the permanent magnet moves up and down along the through hole of the guide member according to the polarity of the coil. Disclosed is a latch-type miniature relay, which is turned on / off.

Preferably, the permanent magnet is plated with a conductor.

More preferably, the conductor is made of nickel, silver and gold.

According to an embodiment of the present invention, an upper iron plate is provided on an upper side of the coil, and a lower iron plate is provided on a lower side of the guide member.

Preferably, a plate material having a predetermined thickness is provided between the guide member and the lower iron plate.

More preferably, the plate is nonmagnetic.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a relay according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing a relay according to an embodiment of the present invention.

1 and 2, the latch type miniature relay 100 using permanent magnets according to an embodiment of the present invention includes a PCB substrate 10 and a direction of current flowing in the upper surface of the PCB substrate 10. According to the polarity of the coil 20, the guide member 30 is formed in the through hole 32 to guide the permanent magnet to move up and down therein, inserted into the through hole 32 of the guide member 30 And a relay contact 50 provided on the upper surface of the permanent magnet 40 that moves up and down according to the polarity of the coil 20 and the guide member 30 and on / off contacted by the permanent magnet 40 that moves up and down. Is done.

Referring to FIG. 2, the coil 20 is polarized by the N pole and the S pole by a magnetic field formed by the direction of the current applied by being wound several times. The guide member 30 is formed so that the through-hole 32 is formed so that the permanent magnet 40 can move up and down via the through-hole 32. Preferably, the through hole 32 is a circular hole as shown in FIG. The permanent magnet 40 is inserted into the through-hole 32 of the guide member 30 to move up and down according to the polarity of the coil 20. For example, when the current flowing in the coil 20 is in the forward direction, the polarity of the coil 20 is changed to the S pole, and the coil 20 having the S polarity attracts the N pole of the permanent magnet 40, and as a result, the upper side The permanent magnet moved to form a closed by turning on the relay contact 50. On the contrary, when the current flowing in the coil 20 is reverse, the polarity of the coil 20 is changed to the N pole, and the coil 20 having the N polarity has a repulsive force (or repulsive force) with the N pole of the permanent magnet 40. As a result, the permanent magnet 40 is pushed downward to turn off the relay contact 50 to form an open path. Depending on the winding direction of the coil 20, the coil polarity in the forward or reverse direction may be interchanged, in which case the reverse operation will be performed as described above.

As shown in FIG. 2, the permanent magnet 40 is a magnet that generates and maintains a stable magnetic field without receiving electrical energy from the outside, and is a magnetic material having a fixed polarity. Permanent magnet 40 is inserted into the through-hole 32 of the guide member 30 is manufactured to a size that can be moved up and down by a magnetic field formed by the coil (20). Preferably, the diameter of the permanent magnet 40 is 2 to 10% smaller than the diameter of the through hole 32, it is possible to move up and down by the magnetic field generated by the current applied to the coil (20). Preferably, the permanent magnet 20 is plated with a conductor. This is to form a closed by the conductor plated on the permanent magnet 20, when the permanent magnet 20 is in contact with the relay contact (50). More preferably, the conductors are nickel, silver and gold excellent in electrical conductivity. Referring to FIG. 2, a relay contact 50 is provided between the guide member 30 and the PCB substrate 10 to be turned on / off by the permanent magnet 40. Therefore, the permanent magnet 40 plated with a conductor according to the polarity of the coil 20 is moved up and down along the through hole 32 of the guide member 30 to turn the relay contact 50 on / off.

Referring to FIG. 2, an upper iron plate 70a is provided on an upper side of the coil 20, and a lower iron plate 70b is provided on a lower side of the guide member 30, respectively. Even when the power supply is cut off due to a power failure, the permanent magnet 40 is maintained in its position by a magnetic field formed between the permanent magnet 40 having magnetic properties and the upper iron plate 70a (or lower iron plate 70b). It does not cause a change in the switch value. As described above, the relay according to the present invention has a short operation time and thus can be built without coil heating, and has a latch function due to a magnetic field formed between the permanent magnet 40 and the iron plates 70a and 70b even during power failure and voltage reinforcement. There is no noise during operation.

Hereinafter, an operating state of the relay according to the embodiment of the present invention will be described with reference to FIG. 2.

Referring to FIG. 2, when power is applied to the coil 20 in the forward direction, a magnetic field is formed in the coil 20 so that the coil 20 has a predetermined polarity according to the winding direction. In this case, if the polarity formed in the coil 20 is the same as the polarity of the upper end of the permanent magnet 40, the permanent magnet 40 is pushed downward by the magnetic field (that is, repulsive force) formed by the coil while the guide member 30 Is attached indirectly to the lower iron plate 70b side via the through hole 32, and as a result, the relay contact 50 is opened. In particular, when the power supply is interrupted by a power failure in the state in which the permanent magnet 40 is open contact, the permanent magnet 40 is kept in the open state by the attraction force formed between the permanent magnet 40 and the lower iron plate (70b). Will be. Then, when power is applied to the coil 20 in the reverse direction, the coil 20 has the opposite polarity, and the coil 20 having the opposite polarity attracts the upper end of the permanent magnet 40 having different polarities. The magnetic bodies having different polarities are pulled upward along the through-hole 32 by the force of attracting each other) to contact the relay contact 50 and as a result, the relay contact 50 is closed. In particular, when the permanent magnet 40 is attached to the relay contact point 50 and the power supply is cut off due to a power failure in the closed state, the permanent magnet 40 by the attraction force formed between the permanent magnet 40 and the upper iron plate (70a) The contact state remains as it is, and as a result, the switch value is not caused even during a power failure.

Referring to FIG. 2, a plate material 60 having a predetermined thickness is provided between the guide member 30 and the lower iron plate 70b. Preferably, the plate 60 is nonmagnetic. When the direction of the current applied to the coil 20 is reversed in the open state (contact off) is switched to the closed state (contact on), in which case the permanent magnet 40 is in direct contact with the lower plate (70b) In this case, the attraction force between the permanent magnet 40 and the lower plate 70b becomes stronger than the attraction force pulling the permanent magnet 40 upward by the coil 20, resulting in malfunction of the relay. Therefore, the plate member 60 having a predetermined thickness is provided between the guide member 30 and the lower iron plate 70b to prevent the permanent magnet 40 and the lower iron plate 70b from directly contacting each other. By blocking a part of the magnetic force formed between the lower plate 70b with the plate 60 to overcome the attraction between the permanent magnet 40 and the lower plate 70b in accordance with the polarity change of the coil and the upper side of the permanent magnet 40 To be moved.

Although the present invention has been illustrated and described with reference to specific preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications will be possible by those who have Thus, for example, it will be apparent to those skilled in the art that the configuration and the like of the relay shown in the drawings may be modified or modified without departing from the spirit and scope of the present invention, and the present invention is limited only by the claims that follow.

According to this invention, it has the following effects.

First, by proposing a relay having a simple structure compared to the conventional relay, it provides a relay that can reduce the manufacturing cost by reducing the volume and simplifying the process.

Second, the permanent magnet plated by the conductor itself moves up and down to move the contacts on and off, so that even when the power supply is cut off, especially in the main wiring board, the permanent magnet is maintained as it is and does not cause a change in the switch value. Does not provide a latch-type relay.

Claims (6)

In the latch type small relay using a permanent magnet, A coil provided on the PCB substrate and the upper surface of the PCB substrate and having a polarity determined according to a direction of a current flowing therein; A guide member having a through-hole formed therein for guiding the permanent magnet up and down; A permanent magnet inserted into the through hole of the guide member and vertically moving according to the polarity of the coil; A relay contact provided on an upper surface of the guide member and contacted on / off by the permanent magnet moving upward and downward, The permanent magnet is a latch-type miniature relay, characterized in that for moving the relay contact up and down along the through hole of the guide member in accordance with the polarity of the coil. The latch type miniature relay according to claim 1, wherein the permanent magnet is plated with a conductor. The latch type small relay of claim 2, wherein the conductor is nickel, silver, or gold. The small relay of claim 1, wherein an upper iron plate is provided on an upper side of the coil, and a lower iron plate is provided on a lower side of the guide member. The latch type small relay according to claim 4, wherein a predetermined thickness of plate is provided between the guide member and the lower iron plate. 7. The latch type miniature relay according to claim 6, wherein the plate is made of nonmagnetic material.

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