KR20050029042A - A rf coaxial switch - Google Patents

Abstract

An RF coaxial switch is provided to form hollow holes inside a permanent magnet and a solenoid, and to drive a contact by a core sliding in length direction by piercing through the hollow holes, thereby realizing a stable switching operation. A permanent magnet(203) is formed with a hollow hole. A solenoid(204) is formed with a hollow hole, while a coil for receiving power is wound thereon. A core(205) is mounted on the hollow holes, and is magnetized when the power is applied to the solenoid(204), then makes different polarities. A push rod(209) vertically moves like the core(205). A guide(208) is supported by inserting the push rod(209) thereinto. A leaf spring(210) is mounted under the push rod(209), and is formed with grooves. A pressing plate(212) is inserted into the grooves of the leaf spring(210), and comprises projections in both sections. Springs(211) are inserted into the projections. A contact(213) is assembled by being inserted into an axis of the pressing plate(212). Paths of the first and second connectors(214,215) are connected or disconnected by the contact(213). A housing(201) is mounted with components. A cover(202) receives the components.

Description

High Frequency Coaxial Switch {A RF coaxial switch}

The present invention relates to a high frequency coaxial switch, and more particularly, to a high frequency coaxial switch capable of performing a stable switching operation by using a core that slides in a longitudinal direction through a solenoid.

In general, high frequency coaxial switches are largely divided into a latching method and a fail safe method. Latching method is a switch that maintains contact point by supplying pulse power only when switching operation, and fail-safe method always maintains NC (Normally Contact) when power is not applied but NO (Normally) when power is applied. Open) A switch that maintains a contact.

1 is a cross-sectional view of a simplified configuration of a switch according to the prior art, showing a latching method. As shown in the drawing, the RF switch according to the related art includes a printed circuit board 101 having a circuit for connection with an external device, and fixed to the printed circuit board 101 by soldering to form first and second electromagnets ( Control signal line 102 for transmitting a control signal to the 104, 105, a magnet plate 103 attached to the lower end of the printed circuit board with a predetermined distance, and a permanent magnet 106 installed in the lower center of the magnet plate And first and second electromagnets 104 and 105 installed at both sides of the permanent magnet and generating electromagnetic power when the power is supplied, and located below the permanent magnet 106 to provide electromagnetic force of the first and second electromagnets. A seesaw 107 rotatable from side to side by the side, a plate spring 107-1 provided at a lower portion of the seesaw and having elasticity, and pressed by the plate spring according to the rotational action of the seesaw. First and second push rods 108 And 109 are attached to lower ends of the first and second push rods to electrically connect the input port 112 and the first output port 113 or the input port 112 and the second output port 114. It comprises a first and second contact (110, 111).

In the conventional switch as described above, the seesaw 107 is magnetized by the permanent magnet 106, and when one of the first and second electromagnets 104 and 105 is supplied with electric power to form a magnetic field, The seesaw is rotated. At this time, the lower side of the seesaw 107 is mounted with a leaf spring 107-1 interlocking with it, the first and second push rods that are moved up and down by the operation of the leaf spring on both lower sides of the leaf spring ( 108 and 109 are provided, and springs are mounted on outer peripheral surfaces of the first and second push rods, respectively.

With the above configuration, when power is supplied to the second electromagnet 105, the left side portion of the leaf spring 107-1 is lowered by the rotation of the seesaw to press the first push rod 108 to thereby press the first contact point. 110 moves downward to electrically connect the input port 112 and the first output port 113. When the power is supplied to the first electromagnet 104 by the same principle, the second contact 111 connects the input port 112 and the second output port 114.

However, since the switch according to the prior art as described above operates one seesaw by two electromagnets, the size of the entire switch is increased due to the large number of components, and the manufacturing cost increases, and the electromagnets and the push rods which are symmetrical to each other are provided. There was a problem that the reliability is greatly reduced in the operation of the switch if the balance is not achieved between them.

The present invention has been made to solve the above problems, to form a hollow hole in the permanent magnet and the solenoid and to perform a stable switching operation by driving the contact point by the core slides in the longitudinal direction through the hollow hole It is an object of the present invention to provide a high frequency coaxial switch.

The present invention, in order to solve the above problems, the permanent magnet 203 of the square or circular hollow hole formed in the center; A solenoid 204 having a coil wound around the outer circumferential surface to receive electric power from the outside, and having a hollow hole formed at a center thereof; A core 205 mounted to the hollow hole of the permanent magnet and the solenoid, the magnet being magnetized as power is applied to the solenoid to form different polarities at upper and lower ends thereof; A push rod 209 which is in close contact with a lower end of the core and moves up and down like a core; A guide 208 to which the push rod is inserted and supported; A leaf spring mounted on the lower portion of the push rod and having elasticity and having grooves formed at both ends thereof; A pressing plate 212 fitted into a groove of the leaf spring, and having a shaft formed at a center thereof and having protrusions at both ends thereof; Springs 211 fitted to the projections of the pressing plate and having elastic force; A contact 213 fitted to the shaft of the pressing plate and assembled; A first connector 214 and a second connector 215 whose paths are connected or disconnected by the contact; And a housing 201 in which the components are mounted, and a cover 202 for accommodating the components.

Hereinafter, a preferred embodiment of the high frequency coaxial switch according to the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding members will be denoted by the same reference numerals and detailed description thereof will be omitted.

Figure 2 is a simplified cross-sectional view of the configuration of the high-frequency coaxial switch according to the present invention, the solenoid 204 is mounted on the lower portion of the square or circular permanent magnet 203 as shown, the permanent magnet and the solenoid The hollow hole 206 is formed in the center so that the core 205 to be described later can slide in the vertical direction, and the coil is wound around the solenoid to receive electric power from the outside.

In the hollow hole of the permanent magnet and the solenoid, the core 205 is magnetized by applying electric power to the solenoid and different polarities are formed at the upper and lower ends thereof, and the lower end of the core is in close contact with each other as the core. A push rod 209 is provided to be moved up and down, which is supported by the guide 208.

In addition, the lower portion of the push rod is mounted with a leaf spring 210 having grooves at both ends thereof, and the groove of the leaf spring is fitted with a pressing plate 212 having a shaft formed at a central portion thereof and having projections at both ends thereof. The springs 211 having elastic force are fitted into the protrusions of the pressing plate. In addition, a contact 213 is assembled to the shaft of the pressing plate, and the first connector 214 and the second connector 215 are connected or disconnected by the contact.

The leaf spring 210, the spring 211, the pressing plate 212, the contact 213, the first connector 214 and the second connector 215 as described above are mounted inside the housing 201, and the housing Outside of the permanent magnet 203, solenoid 204, core 205, guide 208 and the push rod 209 is provided, these components are housed in the cover 202.

3 is a perspective view showing an assembled state of the high frequency coaxial switch according to the present invention. 3 illustrates an assembly state of components other than the housing and the cover, and the permanent magnet 203 and the solenoid 204 are assembled to be in close contact with each other, and the core 205 is formed in the hollow hole formed in the permanent magnet and the solenoid. The push rod 209, which is in close contact with the lower end of the core, is fitted and supported by the guide 208.

In addition, the lower portion of the guide is provided with a pressing plate 212 is fitted into the groove of the leaf spring 210, a shaft is formed in the center of the pressing plate is assembled with the contacts 213, the projections formed on both ends of the pressing plate The spring 211 is fitted to be assembled.

4A and 4B are top and bottom views respectively illustrating a first operation of the high frequency coaxial switch according to the present invention. The first operation of the switch according to the present invention indicates an ON state. Referring first to FIG. 4A, when the upper part of the permanent magnet 203 is the N pole and the lower part is the S pole, power is applied to the solenoid 204 so that the upper part is the N pole. As a result, when the north pole and the south pole are magnetized at the top of the core 205, the upper end of the core is positioned at the bottom of the permanent magnet. Thus, the push rod 209 in close contact with the core is lowered down.

Subsequently, referring to FIG. 4B, the plate spring 210 is pressed by the push rod and at the same time, the pressing plate 212 inserted into the groove of the plate spring is also lowered, and thus the contact point connected to the shaft of the center of the pressing plate. 213 is lowered to connect the first connector 214 and the second connector 215.

5A and 5B are top and bottom views respectively illustrating a second operation of the high frequency coaxial switch according to the present invention. The second operation of the switch according to the present invention indicates an OFF state. In FIG. 5A, when the upper part of the permanent magnet 203 is the N pole and the lower part is the S pole, power is applied to the solenoid 204 in reverse, and the upper part becomes the S pole. If the S pole at the top and the N pole at the bottom of the core 205 are also magnetized, the upper end of the core is positioned at the top of the permanent magnet, and the push rod 209 which is in close contact with the core is raised.

Next, as the push rod is raised in FIG. 5B, the leaf spring 210 is restored to its original state and at the same time, the pressing plate is lifted up by the restoring force of the spring 211 fitted to the projections at both ends of the pressing plate 212. In addition, the contact 213 connected to the shaft of the center of the pressing plate is also raised, so that the first connector 214 and the second connector 215 are blocked.

6A and 6B are diagrams illustrating a latching method and a failsafe method operation of the high frequency coaxial switch according to the present invention, respectively. In the case of using the high frequency coaxial switch according to the present invention as shown in FIG. 6A in the latching manner, for example, the polarity of the applied power when the switch is turned on in the first operation (ON) and the switch is turned off in the second operation (OFF) The switching operation can be performed by reversing the polarity of the applied power supply at the time. On the contrary, when the high frequency coaxial switch according to the present invention is to be used in a fail-safe manner as shown in FIG. 6B, the first operation (NC state) is maintained without the power applied, and when the power is applied, the second operation is performed. Maintain operation (NO state). The applied power supply at this time is irrelevant to the polarity.

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 apparent to those who have knowledge.

As described above, the present invention can reduce the number of components constituting the switch, and therefore, the manufacturing cost is low, and the stable switching operation can be performed, thereby improving the performance of the switch.

1 is a simplified cross-sectional view of the configuration of a switch according to the prior art.

Figure 2 is a simplified cross-sectional view of the configuration of a high frequency coaxial switch according to the present invention.

Figure 3 is a perspective view showing the assembled state of the high frequency coaxial switch according to the present invention.

4A is a top view showing a first operation of a high frequency coaxial switch according to the present invention.

4b is a bottom view showing a first operation of a high frequency coaxial switch according to the present invention;

5A is a top view of a second operation of a high frequency coaxial switch in accordance with the present invention.

Fig. 5B is a bottom view showing the second operation of the high frequency coaxial switch according to the present invention.

Figure 6a is a view showing the latching operation of the high frequency coaxial switch according to the present invention.

Figure 6b is a view showing a fail-safe operation of the high frequency coaxial switch according to the present invention.

※ Explanation of code for main part of drawing

101. Printed circuit board 102, 207. Control signal line

103. Magnet plate 104. First electromagnet

105. Second electromagnet 106, 203. Permanent magnet

107. Seesaw 107-1, 210. Leaf spring

108. The first push rod 109. The second push rod

110. First contact 111. Second contact

112, 20. Input port 113. First output port

114. Second Output Port 201. Housing

202. Cover 204. Solenoid

205. Core 206. Hollow Hole

208. Guide 209. Push Rod

211.Spring 212.Pressure Plate

213. Contacts 214. First Connector

215. Second connector

Claims (6)

Square or circular permanent magnet with a hollow hole in the center thereof; A coil wound around the outer circumferential surface to receive electric power from the outside, the solenoid having a hollow hole formed at a center thereof; A core mounted in the hollow hole of the permanent magnet and the solenoid, and magnetized by applying power to the solenoid to form different polarities at upper and lower ends thereof; A push rod which is in close contact with a lower end of the core and moves up and down like a core; A guide on which the push rod is inserted and supported; A leaf spring mounted on a lower portion of the push rod and having elasticity and having grooves formed at both ends thereof; A pressing plate fitted into a groove of the leaf spring, and having a shaft formed at a center thereof and having protrusions at both ends thereof; Springs respectively inserted in the projections of the pressing plate and having elasticity; A contact fitted to the shaft of the pressing plate; A first connector and a second connector whose paths are connected or disconnected by the contact; And a housing in which the components are mounted and a cover for accommodating the components. The pressing plate is mounted in the hollow hole of the permanent magnet and the solenoid, the core is magnetized and slides in the longitudinal direction as power is applied to the solenoid, and is pushed by a push rod that is in close contact with the lower end of the core and moves up and down like the core. And a high frequency coaxial switch in which a signal path is connected or interrupted by moving up and down a contact fitted to the shaft thereof. The method according to claim 1 or 2, And a first operation such that the upper end of the core is positioned below the permanent magnet by sliding the core downward. The method according to claim 1 or 2, And a second operation so that the upper end of the core is positioned above the permanent magnet by sliding the core upward. The method according to claim 1 or 2, A high frequency coaxial switch, characterized in that it is used in a latching manner by reversing the polarity of the applied power supply when the switch is operated first and the polarity of the applied power supply when the second operation is made. The method according to claim 1 or 2, The high frequency coaxial switch of claim 1, wherein the first operation is maintained in a state where power is not applied and the second operation is maintained when the power is applied.