KR20020010397A - Radio frequency switch - Google Patents

Abstract

PURPOSE: A radio frequency(RF) switch is provided to allow the RF switch to share components with the latch type switch, while preventing connection failure and reducing power consumption and contact chattering time. CONSTITUTION: An RF switch comprises first and second fixed plates installed up and down with a predetermined interval; a plurality of electromagnets installed at both sides underneath the second fixed plate, and which have bobbin cores installed inside of each electromagnet so as to generate a magnetic force; a switch formed of a metallic material which is magnetized to produce a repulsive force; a magnetization member mounted to the switch, and which generates an attractive force with respect to one of electromagnets so as to maintain the tilted state of the switch; a press member for providing a pressure in accordance with the rotation of the switch; and a contact member contacting the connector by the pressure generated from the press member. One of electromagnets has an end penetrating through first and second fixed plates, and the other end equipped with a press bobbin core(150) protruded from the electromagnet. A spring(150a) is arranged in the range of the press bobbin core installed between first and second fixed plates.

Description

High Frequency Switch {RADIO FREQUENCY SWITCH}

The present invention relates to a radio frequency switch used in a high frequency transmission system, and in particular, to implement a fail-safe switch using a magnetized rocker of the latching switch structure to improve the reliability of the operation according to the continuous operation The present invention relates to a high frequency switch that realizes fast switching and maximizes the efficiency according to the part common with the latching switch.

In general, there are two kinds of radio frequency (RF) switches used in a microwave transmission system, a failsafe type switch and a latching type switch.

The fail-safe switch is a switch that maintains a normally NC (normally contact) state when no power is applied, and maintains a normally open (NO) contact when power is applied, and a latching switch is a pulse power supply only when switching. It is a switch to maintain contact by supplying.

Figure 1a and 1b is a configuration diagram showing a conventional fail-safe switch, as shown in the housing 10, the power supply terminal (10a, 10c) mounted on the upper end of the housing 10, and the housing A PCB assembly 11 installed inside the 10 and having a simple control circuit installed therein, a solenoid 12 installed below the PCB assembly 11 to generate electromagnetic force when the power is supplied, and the solenoid 12 ) Is installed in the hollow of the swivel and moved downwards by the electromagnetic force of the solenoid 12, the press pole 13 of the metal material and the rotational shaft (14a) by pressing in accordance with the movement of the press pole (13) A rocker 14 made of a metal that rotates about the center, a failsafe spring 15 provided on a spring support 15b to elastically support the other end of the rocker 14, and a lower end of both ends of the rocker 14. Selection according to the rotational operation of the rocker 14 The first press pin 16 and the second press pin 16 ′ pressed by the first spring, and the first spring 17 and the first spring 17 for elastically supporting the first press pin 16 and the second press pin 16 ′. 2 springs 17 'and end portions of the first press pin 16 and the second press pin 16' are attached to the RF connector, that is, the common terminal 18 and the first terminal 19 or the common terminal ( 18) and a first contact plate 21 and a second contact plate 21 'for electrically connecting the second terminal 20 with each other.

Hereinafter, the operation of the conventional fail-safe switch described above will be described with reference to FIGS. 1A and 1B.

First, in the initial state, the second contact plate 21 ′ is in contact with the common terminal 18 and the second terminal 20. That is, the second press pin 16 'is pressed by pressing the other side (right side in the drawing) of the rocker 14 by the elastic force of the fail-safe spring 15, which causes the second contact plate 21' to be a common RF connector. The terminal 18 is in contact with the second terminal 20 to maintain an NC (normally contact) contact point.

In this state, when power is applied through the power supply terminals 10a and 10c, power is applied to the solenoid 12 through the PCB assembly 11 in which a simple control circuit for interfacing with the solenoid 12 is embedded. As a result, the solenoid 12 generates an electromagnetic force to push the press pole 13 downward.

The downwardly moved press pole 13 presses one side (left side in the drawing) of the rocker 14 to rotate, which causes the first press pin 16 to be pressed so that the first contact plate 21 is an RF connector. Is connected to the common terminal 18 and the first terminal 19 to perform a normally open (NO) contact.

In such a state, when the power supplied to the solenoid 12 is cut off, the solenoid 12 does not generate an electromagnetic force, so that the fail-safe spring 15 that has been compressed at the NO contact is the other side of the rocker 14 ( By pushing the right side) to move the press pole 13 to its original position and simultaneously pushing the second press pin 16 'to the second contact plate 21' again to the common terminal 18 and the second connecting terminal ( 20) to maintain the initial state by making contact (NC contact).

In this state, when the power is not applied, the common terminal 18 and the second connection terminal 20 always maintain the NC contact by the force of the fail-safe spring 15, and when the power is applied, the common terminal 18 and the second connection terminal 20 are maintained. 1 The connecting terminal 19 maintains the NO contact by the electromagnetic force generated by the solenoid 13.

In conclusion, the conventional fail-safe switch maintains the NC contact state by using the elastic force of the fail-safe spring in the initial state when the power is not applied, but when the power is applied, the electromagnetic force is generated at the solenoid. By the elastic force of the fail-safe spring is implemented in a way to return to the initial contact state (NC contact state).

2A and 2B are diagrams showing a conventional latching switch, and as shown therein, a housing 30 and power supply terminals 30a, 30b, 30c mounted on an upper end of the housing 30. And a PCB assembly 31 installed inside the housing 30 and having a simple control circuit, a magnet plate 32 attached to the lower side of the PCB assembly 31 at a predetermined distance, and the magnet plate. The first and second solenoids 33 and 33 'installed at both sides of the lower surface of the bottom 32 to generate electromagnetic force when the power is supplied, and fixed to end portions of the first and second solenoids 33 and 33'. Of permanent magnets 35 installed between the fixed iron plates 34 and 34 ', the first and second solenoids 33 and 33', and the first and second solenoids 33 and 33 '. The rocker 36 is made of metal material which is operated by the electromagnetic force about the pivot shaft 36a by the electromagnetic force, and is installed at the lower ends of both ends of the rocker 36 and alternately pressed by the rocker 36. First and second press pins 37 and 37 ', and first and second springs 38 and 38' that elastically support the first and second press pins 37 and 37 '. And attached to the ends of the first and second press pins 37 and 37 ', that is, the RF connector, that is, the common terminal 39 and the first connection terminal 40 or the common terminal 39 and the second connection terminal ( And first and second contact plates 42, 42 ', which electrically connect 41 to each other.

Hereinafter, the operation of the conventional latching switch as described above will be described with reference to FIGS. 2A and 2B.

Prior to the description, the rocker 36 is magnetically rotated by the permanent magnet 35 so that both ends of the rocker 36 generate magnetic force of the S pole. In addition, the first and second solenoids 33 and 33 'are also magnetized so that the fixed iron plates 34 and 34' at their ends generate a magnetic pole of the N pole.

At this time, it is assumed that one side (left) of the initial rocker 36 is in contact with the first fixed iron plate 34 of the first solenoid 33.

In this state, the S pole is generated in the first fixed iron plate 34 positioned below the first solenoid 33 by supplying pulse power through the power supply terminals 30a and 30b.

Then, since both ends of the rocker 36 are also magnetized to the S pole, one side (left) of the rocker 36 is pushed downward by mutual repulsive force with respect to the same pole, which causes the first press pin 37 to One spring 38 is pushed downward while compressing. When the first press pin 37 is pushed, the first contact plate 42 attached to one end thereof contacts the common terminal 39 and the first connection terminal 40.

As described above, when one side (left) of the rocker 36 is rotated downward, the other side (right) is moved upward to contact the second fixed iron plate 34 ′ of the second solenoid 33 ′. At this time, the other side (right) of the rocker 36 is magnetized to the S pole, and the second fixed iron plate 34 'is magnetized to the N pole, so that an attractive force acts to supply power to the first solenoid 33. It remains in contact even if it is not supplied.

On the other hand, in order to reverse the rotation operation of the rocker, the S pole is supplied to the second fixed iron plate 34 'located below the second solenoid 36' by supplying power through the power input terminals 30b and 30c. To occur.

The subsequent operation is the same as the previously described operation. That is, the repulsive force acts on the other side (right side) of the second solenoid 33 'and the rocker 36 so that the other side (right side) of the rocker 36 is pushed downward. As a result, the second press pin 37 ′ is pushed back so that the second contact plate 42 ′ contacts the common terminal 39 and the second terminal 41.

At this time, one side (left side) of the rocker 36 is moved upward to reach the first fixed iron plate 34 of the first solenoid 33, the attraction force to each other continues to maintain the contact state.

As described above, the conventional fail-safe switch has a problem in that power consumption is high, heat generation rate is high, and this adversely affects other components because power must be continuously supplied to maintain the connection state between the common terminal and the first terminal. .

In addition, there is a problem that the size of the product becomes larger and heavier because the number of windings of the solenoid must be increased in order to reduce the power consumption in accordance with the trend to save power.

In addition, the rocker and the press pole are made of a metal material, and if the contact operation between the rocker and the press pole is repeatedly performed, grooves are formed in the contact surface of the rocker. As a result, the dimensional change as much as being dug is caused by the contact plate connected to the press pin being pressed so small that the contact anxiety and the non-contact occur, thereby reducing the reliability of the switch.

In addition, since the force of the fail spring and the voltage provided to the solenoid are proportional to each other, if the force of the fail spring is increased to increase the force maintaining the NC contact, the sole spring can overcome the force of the fail spring at the NO contact point. As the Onide's electromagnetic force must be counted, the driving voltage increases and the current consumption increases. Therefore, in consideration of the required voltage and current of the user, the elastic force of the spring cannot be sufficiently hardened, so that the force for maintaining the NC contact becomes weak and thus there is a weak problem in the vibration environment.

In addition, when the contact plate is in contact with the RF connector, a phenomenon in which a chattering time is prolonged due to the influence of the fail-safe spring occurs, which is unsuitable for the ultra-high frequency system requiring a fast switching operation.

In addition, the conventional fail-safe switch and latching switch has a problem that the cost reduction or productivity increase is not made because the parts are not shared with each other.

Accordingly, the present invention has been made in order to solve the above problems, and it is possible to share the components of the latching switch, and to prevent the poor connection due to the repeated operation by using the magnetized rocker of the latching structure, consumption It is to provide a high frequency switch to reduce the power and chattering time.

In addition, the present invention is to maintain a constant state by the magnetic force of the magnetized solenoid, by installing a bobbin core in any solenoid to move the bobbin core to the upper side when switching by applying power, and then to the original position when the power is cut off Another object is to provide a high frequency switch that allows the switch to be switched by the force of the bobbin core being restored.

1A is a configuration diagram showing a state in which power is not applied in a conventional fail-safe switch;

1B is a configuration diagram showing a state in which power is applied in a conventional fail-safe switch;

2A is a configuration diagram showing a state in which a NO contact is maintained in a conventional latching switch.

Figure 2b is a configuration diagram showing a state in which the NC contact is maintained in the conventional latching switch.

Figure 3a is a block diagram showing a state in which no power is applied to the latching type fail-safe switch according to the present invention.

Figure 3b is a block diagram showing a state in which power is applied to the latching type fail-safe switch according to the present invention.

* Explanation of symbols for main parts of the drawings

140, 141: first and second solenoid 150: pressurized bobbin core

160: rocker 170: permanent magnet

180, 181: first and second press pins 200: common terminal

210: first connection terminal 220: second connection terminal

230, 231: first and second contact plates

In order to achieve the object of the present invention, the first and second fixing plates installed on the upper side and the lower side at predetermined intervals, and installed on both sides of the bottom of the second fixing plate to generate a magnetic force when the power is applied A switch made of a plurality of electromagnets with a bobbin core mounted therein, a switch made of metal material magnetized to generate repulsive force and a rocker movement at a predetermined angle, and mounted to the switch and any one of the plurality of electromagnets At least one magnetizing means for magnetizing the switch while maintaining an inclined state of the switch, and pressing means for providing a pressing pressure according to the rotation of the switch; And a contact means contacting the connector by the pressure of the pressing means, wherein any one of the plurality of electromagnets has one side penetrating through the first and second fixing plates and the other side is predetermined in the electromagnet. It has a pressurized bobbin core protruding by a length, and provides a spring-loaded high frequency switch for providing a home position restoring force in the pressurized bobbin core section between the first and second fixed plate.

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

The high frequency switch according to the present invention implements a switch to pressurize the switch when the power is cut by installing a bobbin core having a predetermined length in an arbitrary solenoid, and FIGS. 3A and 3B are exemplary views of the present invention. As shown, the housing 100, the power supply terminals 100a and 100b mounted on the upper end of the housing 100, and the first and second supporters 120a installed in the housing 100. Both ends are fixed to (120b) and the PCB assembly 110 having a simple control circuit is installed, and is installed on the lower side of the PCB assembly 100, and both ends are respectively the first and second supports 120a and 120b. The first and second solenoids 140 and 141 which are installed at a predetermined distance to the magnet plate 130 and the magnet plate 130 to generate an electromagnetic force during power supply, and the first solenoid 140 is installed in the hollow of the one side of the magnet A pressure bobbin core 150 mounted to penetrate through the 130 and the PCB assembly 110, and the other side of the first solenoid 140 protrudes by a predetermined length from the lower end of the first solenoid 140 to press the rocker when the power is cut off, and the magnet A spring 150a installed in a pressurized bobbin core section between the plate 130 and the PCB assembly 110 to elastically support the pressurized bobbin core 150 to provide an in-situ restoring force, and the first and second solenoids The rocker 160 is installed between the lower sides of the rockers 160 and is mounted on the center of the rocker 160 to seesaw the metal about the pivot shaft 161. Magnets for magnetizing both ends of the first and second press pins 180 and 181 which are installed under both ends of the rocker 160 and are alternately pressed by a seesaw operation of the rocker 160; First and second springs elastically supporting the first and second press pins 180 and 181 ( 195 and 196 and attached to end portions of the first and second press pins 180 and 181 and the RF connector, that is, the common terminal 200 and the first connection terminal 210 or the common terminal 200. The first and second contact plates 230 and 231 electrically connect the second connection terminals 220.

Here, the first and second solenoids 140 and 141 are configured such that one end of the first and second solenoids 140 and 141 generates magnetic forces having different polarities.

Reference numerals 141 ′ and 141 ′ denote first and second fixed iron plates attached to ends of the first and second solenoids 140 and 141, and 190 denotes first and second press pins 180 and 181. The base plate is movably mounted, and 191 is a body for seating and supporting the base plate 190.

Hereinafter, the operation of the latching type fail-safe switch according to the present invention will be described with reference to FIGS. 3A and 3B. FIG. 3A illustrates a state before power is applied to the first and second solenoids 140 and 141, and both ends of the rocker 160 are S by the permanent magnet 170 attached to the upper side of the rocker 160. It is magnetized to the pole.

In addition, a magnetic force is always formed between the first and second fixed iron plates 140 ′ and 141 ′ of the first and second solenoids 140 and 141 and the permanent magnet 170. ) Is lowered below the central axis 161 of the rocker 160 to press the rocker 160, so the other side (right side) of the rocker 160 is the second fixed steel plate 141 ′ of the second solenoid 141. )

Meanwhile, in the state as shown in FIG. 3A, power is applied to the first and second solenoids 140 and 141 so that the N pole is generated on the first fixed iron plate 140 ′ of the first solenoid 140. The S pole is generated in the second fixed iron plate 141 ′ of the second solenoid 141.

Then, repulsive force is generated between the other side (right side) of the rocker 160 and the second fixed iron plate 141 ', and an attraction force is generated between one side (left side) of the rocker 160 and the first fixed iron plate 140'. do.

As a result, as shown in FIG. 3B, the rocker 160 rotates clockwise about the shaft 161, and one side (left) of the rocker 160 pressurizes the pressurized bobbin core 150. The bobbin core 150 is moved upward while winning the elastic force of the spring 150a. At the same time, the other side (right side) of the rocker 160 pushes the second press pin 181 downward to thereby move the second contact plate 231 installed at the end of the second press pin 181. The common terminal 200 is in contact with the second connection terminal 220.

On the other hand, when the power supplied to the solenoid 140, 141 in Figure 3b is cut off, the first and second fixed iron plate (140 ', 141') of the magnetic force is extinguished by the restoring force of the spring 150a As the core 150 moves downward, one side (left) portion of the rocker 160 is pushed. At this time, an attraction force acts between the other side (right side) of the rocker 160 and the second fixed iron plate 141 '.

Due to the above principle, the rocker 160 returns to the initial state and maintains the state of FIG. 3A until power is applied again.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, the RF switch according to the present invention improves the reliability of the contact by chattering by improving the latching switch to maintain a constant contact state by using magnetized magnetic force between the solenoid and the rocker even without a failsafe spring. It is possible to operate at low power by switching the rocker by the action of the magnetic force, thereby reducing the heat generation.

In addition, more than 90% can be shared with the parts that make up the latching switch, which can maximize the efficiency of parts and improve productivity.

Claims (2)

A plurality of electromagnets having bobbin cores installed therein, the first and second fixing plates provided at upper and lower sides at predetermined intervals, and on both sides of the bottom of the second fixing plate, and having a bobbin core mounted therein to generate magnetic force when power is applied. And a switch made of a metal material magnetized to generate the plurality of electromagnets and the repulsive force, the switch being rocker-moved at a predetermined angle, and mounted to the switch and inclining the switch by generating an attraction force with any one of the plurality of electromagnets. At least one magnetizing means for maintaining the state and magnetizing the switch, and pressurizing means for providing a pressing pressure according to the rotation of the switch; And a contact means for contacting the connector by the pressure of the pressing means. One of the plurality of electromagnets has a pressurized bobbin core whose one side penetrates the first and second fixed plates and the other side thereof protrudes a predetermined length from the electromagnet, and the pressurized bobbin core between the first and second fixed plates. High-frequency switch with spring to provide home position restoring force. The method of claim 1, The pressurized bobbin core is located below the central axis of the switch in the state that power is not applied to a plurality of electromagnet switch for pressing the switch to pressurize.