KR102628377B1 - Relay - Google Patents

Abstract

The purpose of the present invention is to provide a relay that includes a structure for improving electromagnetic force in addition to the coil wire, can maximize the winding space of the coil wire, and can improve productivity by simplifying parts and structure,
The present invention includes a main plate that is panel-shaped and has a hole formed through it in the center; A coil portion installed at a lower portion of the main plate and including a cylindrical bobbin extending in one direction and a coil wire wound around the bobbin; an upper terminal installed on the main plate, installed on one side of the coil unit, and including a plurality of electrodes; A movable core portion disposed in the center of the coil portion and movable through a hole in the main plate to move back and forth in the longitudinal direction of the bobbin, so as to be in contact with or spaced apart from the upper terminal; and a ring-shaped permanent magnet disposed on the upper surface of the main plate and disposed in a direction surrounding the outer circumference of the movable core portion. It is characterized by including.

Description

Relay {Relay}

The present invention relates to a relay, a device that opens or closes an electric circuit. More specifically, it relates to a relay that opens and closes an electric circuit by moving the movable electrode with a coil to make it contact or separate from the fixed electrode.

A relay is a device that operates when an input reaches a certain value to open and close another circuit. It includes contact relays, thermal relays, pressure relays, and optical relays. Among these, a relay with a contact point has a fixed electrode and a movable electrode and is formed to conduct electricity by moving the movable electrode so that it comes into contact with the fixed electrode.

The movable electrode operates on the principle that when electricity is applied to a coil wire, a current flows and an electromagnetic field is generated, and the electrode is moved using electromagnetic force. If the electromagnetic force can be increased, the weight of the relay can be reduced and its size can be made smaller, so an iron core upper and lower adsorption structure or a bottom permanent magnet structure is used as a method to increase the electromagnetic force.

Figure 1 is a perspective view and a partial cross-sectional view of a relay to which a conventional iron core upper and lower adsorption structure is applied, and Figure 2 is a perspective view and a partial cross-sectional view of a relay to which a conventional lower permanent magnet structure is applied. As shown in the general structure of the relay, two fixed electrodes (1) are formed, a movable electrode (2) is formed to conduct electricity to the two fixed electrodes, and a movable core (5) is formed in the center of the wound coil wire (4). The movable core is disposed and connected to the movable electrode by a rod. And, based on the main plate 7, the coil wire 4 is formed at the bottom and the movable electrode 2 is formed at the top.

Referring to Figure 1, the iron core vertical adsorption method forms a fixed core (6) at the bottom of the main plate in addition to the movable core (5), and the movable core and the fixed core are formed to engage with each other through a tapered structure. However, in this iron core upper and lower adsorption method, the fixed cores 6 must be placed at intervals to form a large magnetic field, so a structure that maximizes the length and total volume of the coil wire 4 is required, and the fixed cores 6 must be installed. It is also necessary to secure it to the main plate (7). In addition, there are difficult processing problems, such as forming the core shape to be tapered to increase the contact cross-sectional area.

Referring to Figure 2, the lower permanent magnet method installs a permanent magnet (6a) at the bottom of the main plate (7), but it does not include a permanent magnet and is formed to contact the movable core. However, even in this case, there is a spatial problem in that the iron piece 6b must be used together, so parts must be added, and the winding space of the coil wire 4 must be devoted to the permanent magnet. Therefore, there is a problem that the magnetic field generation area of the coil wire is reduced.

Therefore, there is a need for a structure that can improve the magnitude of electromagnetic force without using the conventional iron core upper and lower adsorption method or bottom permanent magnet method.

The present invention is intended to solve the problems of the prior art as described above. It includes a structure for improving electromagnetic force in addition to the coil wire, maximizes the winding space of the coil wire, and improves productivity by simplifying parts and structure. The purpose is to provide a relay that can be used.

Embodiments of the present invention provide the following relay to solve the above problems.

The present invention includes a main plate that is panel-shaped and has a hole formed through it in the center; A coil portion installed at a lower portion of the main plate and including a cylindrical bobbin extending in one direction and a coil wire wound around the bobbin; an upper terminal installed on the main plate, installed on one side of the coil unit, and including a plurality of electrodes; A movable core portion disposed in the center of the coil portion and movable through a hole in the main plate to move back and forth in the longitudinal direction of the bobbin, so as to be in contact with or spaced apart from the upper terminal; and a ring-shaped permanent magnet disposed on the upper surface of the main plate and disposed in a direction surrounding the outer circumference of the movable core portion. It is characterized by including.

Additionally, an insulator is made of an insulating material, is disposed on the upper surface of the main plate, and is formed to surround an outer periphery of the permanent magnet and the movable core portion; It is characterized in that it further includes.

In addition, the insulator is characterized by including a magnet storage portion whose lower surface is in contact with the upper surface of the main plate, and where the permanent magnet is stored in the lower part so as to cover the side and upper surfaces of the permanent magnet.

In addition, a seating hole is formed through a central portion of the magnet storage portion, and the movable core portion is installed to be reciprocatable through the seating hole. The seating hole is smaller than the width of the inner diameter of the permanent magnet, and the movable core portion is formed through a central portion of the magnet storage portion. It is characterized by being formed in a shape corresponding to the cross section.

In addition, the movable core portion includes a movable core disposed in the longitudinal direction inside the bobbin, a movable contact formed to be in contact with the upper terminal to conduct electricity, and a holder connecting the movable core and the movable contact, and the movable core. The core, holder, and movable contact point are arranged in the longitudinal direction of the bobbin, and on the side of the holder, a rib-shaped protrusion is formed to form a step-shaped seating protrusion, and with the upper terminal and the movable core portion spaced apart, The holder is inserted into the seating hole, and the seating protrusion is in contact with the upper surface of the magnet storage unit.

According to the problem solving means of the present invention as discussed above, various effects including the following can be expected. However, the present invention does not require all of the following effects to be established.

According to the present invention, since conventional iron cores or permanent magnets are not disposed in the area where the coil wire is wound, the number of turns of the coil wire can be maximized, thereby maximizing the magnetic force. That is, by placing the permanent magnet on the upper side of the main plate, the permanent magnet can be placed without disturbing the space of the coil wire. Therefore, there is an effect of reducing the volume and weight of the entire relay. In addition, when this structure is applied, coil consumption is reduced, resulting in cost reduction, and operational safety is increased, thereby improving quality.

In addition, conventionally, in order to place a permanent magnet at the bottom of the main plate, an iron piece had to be placed at the end of the permanent magnet. However, when the permanent magnet is placed at the top of the main plate, the iron piece is unnecessary, so the number of parts can be reduced, which is economically effective.

In addition, since the holder is seated on the insulator when the relay is turned off, the moving distance of the contact point can be kept constant, and since the contact between the holder and the insulator is between injection molded plastic materials, it is less likely to collide with permanent magnets or iron pieces during operation. It has the effect of reducing noise.

Figure 1 is a perspective view and partial cross-sectional view of a relay to which a conventional iron core upper and lower adsorption structure is applied;
Figure 2 is a perspective view and partial cross-sectional view of a relay with a conventional lower permanent magnet structure applied;
Figure 3 is a perspective view of the housing, relay body, and installation cover of the relay of the present invention separated;
Figure 4 is a perspective view of the relay body separated from Figure 3;
Figure 5 is a front view showing a partial configuration of the relay body of Figure 3;
Figure 6 is a perspective view showing the configuration related to the upper terminal and movable contact;
Figure 7 is a perspective view showing two embodiments of a contact guide;
Figure 8 is an enlarged view showing the movable contact point being pressed by the contact guide;
Figure 9 is a perspective view of the upper core and the movable core portion and an enlarged view of the holder seating jaw portion;
Figure 10 is a longitudinal cross-sectional view of a portion of Figure 9;
Figure 11 is a perspective view and front view of the lower magnet;
Figure 12 is a perspective view of the insulator;
Figure 13 is a perspective view with the outer housing removed and a cross-sectional view of the movable core portion.

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

Figure 3 is a perspective view of the housing, relay body, and installation cover of the relay of the present invention with the housing, relay body, and installation cover separated, Figure 4 is a perspective view of the relay body in Figure 3 separated, Figure 5 is a front view showing a partial configuration of the relay body of Figure 3, FIG. 6 is a perspective view showing the configuration related to the upper terminal and the movable contact, Figure 7 is a perspective view showing two embodiments of the contact guide, Figure 8 is an enlarged view showing the movable contact being pressed by the contact guide, and Figure 9 is an enlarged view showing the movable contact being pressed by the contact guide. A perspective view of the upper core and the movable core portion and an enlarged view of the holder seating jaw, Figure 10 is a longitudinal cross-sectional view of a portion of Figure 9, Figure 11 is a perspective view and front view of the lower magnet, Figure 12 is a perspective view of the insulator, and Figure 13 is an external housing. This is a perspective view of the removed state and a cross-sectional view of the movable core.

As shown in these drawings, one embodiment of the relay 10 of the present invention is formed by installing the relay body 200 in a hollow space such as a housing formed by the external housing 101 and the installation cover 102. .

The relay body 200 consists of an upper housing 210, an insulating part 220, a movable core part 230, a coil part 240, and a lower housing 250, and a fixed electrode is formed on the upper housing 210. A movable electrode is formed on the movable core portion 230, and when current is passed through the coil portion 240, the movable electrode moves and comes into contact with the fixed electrode. The detailed configuration is explained below.

The upper housing 210 includes an upper yoke 211 that serves as the housing and an upper magnet 212 inserted inside the upper yoke 211.

The insulating portion 220 is configured for insulation and includes an upper terminal 221 inside, which is a fixed electrode or fixed contact point. Two upper terminals 221 are formed, and may be formed spaced apart in a structure electrically connected by a movable contact point 231. In addition, a ceramic plate 222b, which has a panel shape and is made of Fe-Ni alloy, etc., is combined in a box shape on the upper side of the ceramic plate 222b to form a ceramic base 222a made of alumina. The movable contact point 231 moves within the ceramic base 222a. Additionally, an insulator 223 for insulation is inserted into the insulating portion 220 between the ceramic base 222a and the movable contact point 231.

The insulator 223 is disposed within a range that does not impede the movement of the movable contact 231, is formed of an injection molded plastic product, and is configured to prevent damage to internal components from a high-voltage arc that occurs when the relay 1 is turned off. More specifically, the insulator 223 includes a panel-shaped base portion 223a, a rib 223b extending upward from the base portion 223a, and a magnet storage portion that protrudes in the center and forms a space on the inside. (223c) can be formed. The magnet storage unit 223c is formed to cover the side and upper surface of the lower magnet 236, and a seating hole 223d may be formed through the central portion of the upper surface of the magnet storage unit 223c. The holder 234 is installed and moves through the seating hole 223d, and the shape of the seating hole 223d may be formed to correspond to the shape of the outer surface of the holder 234. In addition, although not shown in the drawing, a stepped structure of a complementary shape that can be engaged with the seating projection 234a of the holder 234 may be formed around the seating hole 223d.

In addition, the movable core portion 230 is a part where the movable contact 231 moves, and the movable contact 231 extends in one direction to connect the two upper terminals 221. For example, the movable contact point 231 may be formed in the shape of an elongated panel as shown in the drawing so that one side is in contact with the upper terminal.

A main plate 237 is installed on the lower surface of the ceramic plate 222b, and a movable shaft may be formed through the main plate 237 so that the movable contact point 231 can be driven. The main plate 237 is magnetized by magnetic force and is configured to exert an attractive force with the core.

Furthermore, a lower magnet 236, which is a ring-shaped permanent magnet, is installed on the upper surface of the main plate 237, and the lower magnet 236 may have an N pole (236a) and an S pole (236b) formed in the horizontal direction. The lower magnet is a component that amplifies the magnetic force of the solenoid and is related to the operation of the moving core portion. The above-described insulator 223 may be installed on the lower magnet 236. The movable contact point 231 is installed by a holder 234, and an upper spring 233 is inserted between the holder 234 and the movable contact point 231 to apply an elastic force in the moving direction.

Meanwhile, the holder 234 is formed in a shape with an area and a certain height, such as a rectangular parallelepiped, and a holder pin 235 may be formed to protrude on one side or on the other side facing the first side. Additionally, a groove may be formed on the surface where the holder pin 235 is formed. Additionally, on the surface where the holder pin 235 is not formed, a seating protrusion 234a that protrudes laterally in a rib shape from the upper portion may be formed. That is, a jaw may be formed at the bottom of the seating jaw 234a.

Therefore, the holder 234 moves together with the movable contact point 231, but has a shape in which the seating protrusion 234a can be caught on the upper surface of the magnet storage portion 223c of the insulator 223 when the relay 10 moves in the off direction. am. Accordingly, while limiting the range of motion of the holder 234, the holder 234 and the insulator 223 are formed of plastic injection molded products, which has the effect of reducing noise even when they collide.

Additionally, a contact guide 232 may be installed on the holder 234 and the movable contact point 231. The contact guide 232 may be installed to connect the holder 234 and the movable contact point 231, and may be formed in an overall bent panel shape. The contact guide 232 includes a limiting portion 231a arranged to overlap the upper surface of the movable contact 231, a connecting portion 231b extending from the limiting portion 231a toward the holder 234, and a connecting portion 231b. It may include an insertion portion 231c bent inward at the end and a wing portion extending from the limiting portion 231a in a direction extending the surface overlapping the movable contact point 231. The wing portion extends from the limiting portion 231a and may be bent and inclined toward the holder 234. In the first embodiment of the contact guide 232 of the present invention, the first wing portion 231d is formed at a plurality of spaced apart locations along the width direction of the movable contact point 231, or in the second embodiment 2320, the first wing portion 231d The second wing portion 2310d may be formed to extend long into the shape of a single wing. Additionally, a hole or groove may be formed on the connection portion 231b so that it can be inserted into the holder pin 235 described above.

Due to the elastic force of the upper spring 233, the movable contact point 231 is brought into close contact with the lower surface of the contact guide 232, and in particular, it can be brought into close contact as if pressed by the wing portion. Therefore, the movable contact point 231 can remain horizontal during operation and can be fixed without shaking in the vertical direction.

Continuing to explain the movable core unit 230, the holder 234 is connected to the movable core 238 by a rod 239, and the movable core 238 generates magnetic force when power is applied to the coil wire 241. Once formed, it moves along the longitudinal direction of the bobbin by electromagnetic force.

A lower spring that supports between the main plate 237 and the movable core 238 may be installed on the outer periphery of the rod 239. That is, one end of the lower spring may be supported on the lower surface of the main plate 237, and the other end may be supported on the upper surface of the movable core 238.

The coil unit 240 is a part where power is supplied to operate the relay 10. A coil wire 241 is wound around the bobbin 242, and a terminal 243 may be formed at one end of the coil wire.

The lower housing 250 may include a lower yoke 251 and a bobbin guide 252 consisting of a lower surface and a side surface. A bobbin guide 252 is formed in a cylindrical shape at the center of the lower yoke 251 so that the bobbin 242 is inserted into the outer circumference, and the movable core 238 can be driven in the longitudinal direction inside the bobbin guide 252. . In addition, the side surface of the lower yoke 251 extends upward from the lower yoke 251, and a step may be formed at the side end so that the main plate 237 can be installed.

In this specification, each configuration is described in detail by dividing it by configuration, but embodiments that can be derived by arbitrarily combining some configurations also fall within the scope of the present invention.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations can be made by those skilled in the art in the technical field to which the present invention belongs without departing from the essential characteristics of the present invention. The scope of protection shall be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope shall be construed as being included in the scope of rights of the present invention.

10 relay 101 external housing
102 Installation cover 200 Relay body
210 Upper housing 211 Upper yoke
212 upper magnet 220 insulation part
221 Upper terminal 222a Ceramic base
222b ceramic plate 223 insulator
223a base 223b rib
223c magnet storage section 223d seating hole
230 movable core part 231 movable contact point
231a limiting part 231b connecting part
231c insertion part 231d first wing part
2310d 2nd wing 232 contact guide
233 upper spring 234 holder
234a Seating jaw 235 Holder pin
236 lower magnet 236a N pole
236b S pole 237 main plate
238 movable core 239 rod
240 coil part 241 coil wire
242 bobbin 243 terminal
250 lower housing 251 lower yoke
252 bobbin guide

Claims (5)

A main plate that is panel-shaped and has a hole formed through it in the center;
A coil portion installed at a lower portion of the main plate and including a cylindrical bobbin extending in one direction and a coil wire wound around the bobbin;
an upper terminal installed on the main plate, installed on one side of the coil unit, and including a plurality of electrodes;
A movable core portion disposed in the center of the coil portion and movable through a hole in the main plate to move back and forth in the longitudinal direction of the bobbin, so as to be in contact with or spaced apart from the upper terminal; and
a ring-shaped permanent magnet disposed on the upper surface of the main plate and disposed in a direction surrounding an outer circumference of the movable core portion; and
an insulator disposed and coupled to the upper surface of the main plate and formed to surround an outer periphery of the permanent magnet and the movable core portion;
Including,
The insulator has a lower surface in contact with the upper surface of the main plate, the permanent magnet is stored in the lower part, covers the side and upper surface of the permanent magnet, and includes a magnet storage portion formed to fix the permanent magnet,
The movable core portion includes a movable core disposed in the longitudinal direction inside the bobbin, a movable contact formed to contact the upper terminal to conduct electricity, and a holder connecting the movable core and the movable contact,
A relay, wherein the movable contact and the holder move along the longitudinal direction of the bobbin with respect to the permanent magnet as power is applied to the coil wire.
delete delete According to paragraph 1,
A seating hole is formed through the central portion of the magnet storage portion,
The movable core portion is installed to enable reciprocating movement through the seating hole,
The relay, wherein the seating hole is smaller than the width of the inner diameter of the permanent magnet and is formed in a shape corresponding to the cross section of the movable core portion.
According to clause 4,
The movable core, holder and movable contact are arranged in the longitudinal direction of the bobbin,
On the side of the holder, a seating protrusion in the shape of a step is formed, which protrudes in the shape of a rib,
In a state where the upper terminal and the movable core are spaced apart, the holder is inserted into the seating hole, and the seating protrusion is in contact with the upper surface of the magnet storage portion.

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