KR101060196B1 - RF switch with simplified structure - Google Patents

Abstract

The disclosed invention relates to an RF switch of a simplified structure. The disclosed switch includes a sliding member made of metal; A guide member for guiding movement of the sliding member; And a solenoid providing a magnetic force to the sliding member, wherein the sliding member moves upward and downward along the guide member depending on whether a magnetic force is generated in the solenoid. According to the disclosed switch, the switching operation can be performed without using a seesaw having a complicated structure, the operation mechanism and structure are simplified, and the on / off operation can be more stably performed.

RF, switch, guide

Description

RF Switch for Providing Stable Contact Force

The present invention relates to an RF switch, and more particularly, to an RF switch in which the operation structure of the RF switch is simplified.

RF (Radio Frequency) switch has low insertion loss and high attenuation characteristics compared to the conventional semiconductor switch, and is widely used in various fields because of its high efficiency at high power. It not only functions as a simple switch, but also functions as a synthesizer for synthesizing the incoming RF signals into the required lines.

RF (Radio Frequency) switch has low insertion loss and high attenuation characteristics compared to the conventional semiconductor switch, and is widely used in various fields because of its high efficiency at high power. It not only functions as a simple switch, but also functions as a synthesizer for synthesizing the incoming RF signals into the required lines.

In general, an RF switch is classified into a latching type RF switch and a failsafe type RF switch according to whether or not a contact is maintained according to application of electric power.

FIG. 1 is a view showing the configuration of a conventional latching RF switch, and a conventional latching RF switch will be described with reference to FIG. 1.

As shown in FIG. 1, a conventional latching type RF switch is fixed to a main plate 100, a magnet 110 fixed to the main plate 100 to magnetize pure iron, and a power is applied thereto. The first solenoid 120a, the second solenoid 120b, the seesaw 130 magnetized by the solenoid 120, and the magnetized seesaw 130 are inclined and pressurized to generate an electromagnetic force. A first push rod 140a and a second push rod 140b of a nonmetal material, a first contact reed 160a and a second contact lead assembled to the pressurized push rod 140. 160b, a common terminal connector 180b inserted into the housing 170, and a first terminal connector 180b and a second terminal connector 180c.

In the RF switch according to the above configuration, when power is applied to the solenoid 120, the seesaw 130 is inclined by the magnetization of the solenoid 120 to be pressed against the non-metallic push rod 140.

The contact lead 160 connected to the push rod 140 contacts the connector 180 inserted into the housing to send an RF signal through the contact connector 180. In a state in which power is not applied, the elastic force of the spring 150 coupled to the nonmetallic push rod 140 is used to return to the non-contact state again.

While the latching RF switch is a switch that maintains the contact by supplying pulsed power only when switching, the fail-safe RF switch always maintains the NC (Normally Contact) contact point when the power is not applied. It is a switch to maintain NO (Normally Open) contact.

FIG. 2 is a diagram illustrating a configuration of a conventional failsafe type RF switch, and a conventional failsafe type RF switch will be described with reference to FIG. 2.

As shown in FIG. 2, the conventional fail-safe RF switch includes a main plate 200, a solenoid 210 that generates an electromagnetic force when a power is applied, and a hollow of the solenoid 210. A seesaw which is installed to be movable and rotates about a rotational shaft by pressing according to the movement of the press pole 220 and the press pole 220 of a metallic material moving up and down by the electromagnetic force of the solenoid. 230, the fail-safe spring 240 is installed to support the other end of the seesaw 230, the second installed on the lower end of the seesaw 230 is selectively pressed according to the rotational operation of the seesaw 230 At one end of the push rod 250a and the second push rod 250b, the first and second springs 260a and 260b supporting the push rod 250 and the push rod 250 Attached and assembled first contact reed 270 a) and a second contact lead 270b, a common terminal connector 280a inserted into the housing 290, and a first terminal connector 280b and a second terminal connector 280c.

In the fail-safe type RF switch according to this configuration, when the power is not applied to the solenoid 210, the seesaw 230 presses the second push rod 250b on the elastic force of the fail-safe spring 240, thereby causing the second contact. The lead 270b contacts the common terminal connector 280a and the second terminal connector 280c.

When power is applied in this state, the solenoid 210 generates an electromagnetic force to push down the press pole 220 movably installed in the hollow of the solenoid 210.

The downwardly moved press pole 220 rotates the seesaw 230 by pressing the other end of the seesaw 230, thereby causing the first push rod 250a to be pressed, so that the first contact lead 270a is connected to the common terminal connector. 280a and the first terminal connector 280b come in contact with each other, and the second contact lead 270b is in a non-contact state by the elastic force of the spring 260b to selectively transmit the RF switch.

The conventional RF switch having such a structure has a structure in which the latching type and the failsafe type have a seesaw, and selectively transmits the RF signal by maintaining the contact according to the movement of the seesaw.

Such a seesaw is required to be made relatively precisely, there is a problem that greatly affects the switching operation when the position of the seesaw is unstable, the operation structure also had a complex problem.

In order to solve the problems of the prior art as described above, the present invention proposes an RF switch that performs a switching operation without using a seesaw.

It is another object of the present invention to propose an RF switch which can simplify the operation mechanism and structure.

Another object of the present invention is to propose an RF switch capable of more stable on / off operation.

Other objects of the present invention will be readily apparent to those skilled in the art through the following examples.

In order to achieve the above object, according to a preferred embodiment of the present invention, a sliding member made of metal; A guide member for guiding movement of the sliding member; And a solenoid providing a magnetic force to the sliding member, wherein the sliding member is provided with an RF switch having a simplified structure moving up and down along the guide member according to whether or not magnetic force is generated in the solenoid.

The guide member is coupled to an elastic member on which the sliding member extends.

The sliding member has a 'c' shape and includes a horizontal upper portion, a vertical portion, and a horizontal lower portion, and the holes are formed at the horizontal upper portion and the horizontal lower portion to be coupled to the guide member.

The sliding member is the RF switch of the simplified structure characterized in that when the magnetic force is generated from the solenoid is lowered while contracting the elastic member, and when the magnetic force disappears from the solenoid is returned to its original state by the restoring force of the elastic member.

The guide member further includes a solenoid coupling portion projecting vertically from a predetermined portion of the guide member, and the solenoid is supported by the solenoid coupling portion.

The RF switch further includes a push rod and a contact lead coupled to a lower end of the push rod, a pressing member is coupled to a horizontal lower portion of the sliding member, and the pressing member corresponds to the movement of the sliding member. Pressurize.

The pressing member may include a leaf spring.

According to another aspect of the invention, the top plate; Bottom plate;

A guide member coupled to the upper plate in a vertical direction; Solenoids; A sliding member coupled to the guide member and moving in a vertical direction according to the magnetic force of the solenoid; A simplified RF switch is provided that includes a pressing member coupled to the sliding member to press the push rod according to the magnetic force of the solenoid.

According to the RF switch according to the preferred embodiment of the present invention, it is possible to perform a switching operation without using a seesaw of a complicated structure, the operation mechanism and structure is simpler, there is an advantage that the on / off operation more stable. .

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the RF switch using a sliding method according to the present invention.

 FIG. 3 is a cross-sectional view illustrating a magnetic force not applied to an RF switch using a sliding method according to an embodiment of the present invention, and FIG. 4 illustrates an RF switch using a sliding method according to an embodiment of the present invention. It is a figure which shows sectional drawing when a magnetic force acts.

3 and 4, the RF switch using the sliding method according to an embodiment of the present invention is the upper plate 300, the guide member 302, the sliding member 304, the solenoid 306, the pressing member ( 308, push rod 310, contact lead 312 and bottom plate 314.

In the present invention, a switching operation is stably performed using the sliding member 304 and the guide member 302 without using a seesaw to pressurize the push rod. Meanwhile, in FIG. 3, the components of the solenoid, the magnet, the push rod, the contact lead, and the like are only examples of the minimum configuration for convenience of description, and a larger number may be provided when the path of the RF signal is diversified. Will be apparent to those skilled in the art.

The upper plate 300 serves to fix the guide member 302 and is made of a metal material. In the conventional RF switch, the main plate 300 functions to fix the solenoid, but in the present invention, the guide member 302 is fixed to the main plate 300.

One end of the guide member 302 is fixed to the upper plate 300, and is formed perpendicular to the upper plate 300. One end of the guide member 302 may be fixed to the upper plate 300 by bolt coupling, for example, but is not limited thereto. The guide member 302 may be fixed using various coupling methods. The guide member 302 guides the sliding direction of the sliding member 304, and the elastic member 302a is coupled to a part of the guide member. The elastic member 302a may be implemented as a spring, for example, and may be coupled to an upper portion of the guide member as shown in FIGS. 3 and 4. The elastic member 302a is used when supporting the sliding member 304 and restoring the position of the sliding member 304, and the detailed operation will be described later.

On the other hand, the solenoid fixing part 302b protrudes in the horizontal direction at a predetermined portion of the guide member 302.

The solenoid 306 is coupled to the solenoid fixing part 302b to support the solenoid 306. The solenoid 306 may be fixed to the solenoid fixing part 302b by soldering or the like, and of course, the coupling method may be variously selected. In a conventional RF switch, the solenoid is generally fixed to the top plate, but according to a preferred embodiment of the present invention, the solenoid 306 is placed in an intermediate position inside the switch and is supported by the solenoid fixing part 302b.

Solenoid 306 generates a magnetic force when a current is applied. The current applied to the solenoid is controlled by a separate control circuit (not shown), and the on / off operation of the switch is performed according to the application of the current.

The sliding member 304 is coupled to the solenoid, and may have a "c" shape as shown in FIGS. 3 and 4.

5 is a diagram illustrating a perspective view of a sliding member according to an embodiment of the present invention, wherein the sliding member 304 may include a horizontal upper portion 304a, a vertical portion 304b, and a horizontal lower portion 304c.

The sliding member 304 is coupled to the guide member 302, in order to be coupled to the guide member 302, a first hole 500 is formed in the horizontal upper portion 304a, and a second hole (in the horizontal lower portion 304c). 502 is formed. The guide member 302 penetrates through the first hole 500 of the horizontal upper portion 304a and the second hole 502 of the horizontal lower portion 304c.

The sliding member 304 is coupled in such a way as to span the elastic member 302a coupled to the guide member 302, and the diameter of the first hole is maintained so that the diameter of the first hole is maintained in a state where the magnetic force does not occur. It is set smaller than the diameter of the elastic member 304a of 304. On the other hand, the diameter of the portion of the guide member 302 to which the elastic member is not coupled is preferably larger than the diameter of the portion of the guide member 302 to which the elastic member 302a is stably held. Also corresponds to the diameter of.

Meanwhile, the pressing member 308 is coupled to the horizontal lower portion 304c of the sliding member 304. The pressing member 308 pressurizes the push rod 310 when the magnetic force is generated, and it is preferable that the pressing member 308 is made of a material having an elastic force such as a leaf spring.

An elastic body such as a spring 330 is coupled to the push rod 310, and moves up and down depending on whether the pressing member 308 is pressed. A hole for penetrating the push rod 310 is formed in the lower plate 314, and a contact lead 312 is coupled to the lower portion of the push rod 310.

The contact lead 312 moves up and down corresponding to the movement of the push rod 310, and contacts the first connector pin 350 and the second connector pin 360 when the push rod 310 is pressed. That is, when the push rod 310 is pressed, the contact lead 312 forms an RF path between the first connector pin 350 and the second connector pin 360 to enable transmission of the RF signal (switch on). ), When the push rod 310 is not pressed, an RF path between the first connector pin 350 and the second connector pin 360 is not formed (switched off).

Hereinafter, an operation of an RF switch using a sliding method according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4.

In a state where no current is applied to the solenoid 306 (that is, no magnetic force is generated in the solenoid), the RF switch according to the exemplary embodiment of the present invention maintains a state as shown in FIG. 3.

In FIG. 3, the sliding member 304 remains in a state spanning the elastic member 302a, and thus the pressing member 308, which is embodied as an elastic body such as a leaf spring, does not press the push rod 310. Since the contact lead does not contact the first connector pin 350 and the second connector pin 360, no RF path is formed between the first connector pin 350 and the second connector pin 360.

When a current is applied to the solenoid 306, the attraction force for attracting the sliding member 304 made of a metal material is generated in the solenoid 306. At this time, the attraction force by the magnetic force of the solenoid 306 should be greater than the elastic force of the elastic member 302a.

As shown in FIG. 4, the sliding member 304 is lowered by the magnetic force of the solenoid 306. In this case, the sliding member 304 may be lowered to contact the upper portion of the solenoid 306 and may be lowered only to a predetermined position without contacting the upper portion of the solenoid 306 according to the elastic force of the elastic member 302a.

The movement of the sliding member 306 is guided by the guide member 302 so that it moves only in the vertical direction and no movement in the horizontal direction occurs. As shown in FIG. 4, when the sliding member 304 is lowered by the magnetic force of the solenoid 306, the elastic member 302a supporting the sliding member contracts.

In response to the lowering of the sliding member 304, the pressing member 308 coupled to the sliding member 304 is also lowered, and the pressing member 308 presses the push rod 310. The push rod 310 is lowered by pressurization, and the contact lead 312 provided at the lower end of the push rod 310 is also lowered. When the push rod 310 descends, the spring coupled to the side of the push rod 310 contracts.

As shown in FIG. 4, when the contact lead 312 is lowered, the contact lead 312 contacts the first connector pin 350 and the second connector pin 360, and the first connector pin 350 and the second connector pin 360. An RF path between the connector pins 360 is formed.

When the magnetic force of the solenoid 306 disappears, the sliding member 304 is restored to its original position as shown in FIG. 3 by the restoring force of the elastic portion 302a of the guide member 302. In addition, as the sliding member 302 is restored to its original position, the push rod 310 also returns to the state shown in FIG. 3 by the restoring force of the spring coupled to the side, and the contact lead 312 returns to the state shown in FIG. 3. The switch is turned off.

As described above, the RF switch of the present invention is provided with a guide member 302 to guide the movement of the sliding member 304 so that the guide member 302 can move the sliding member 304 in the vertical direction, the solenoid ( According to the magnetic force of 306, the 'c' shaped sliding member is moved while pressing the push rod. In this operation method, the on / off operation of the switch is more stable than the conventional switch operation using a seesaw, and each solenoid can independently control the contact lead, thereby enabling a more efficient switching operation. There is an advantage, and since the seesaw is not used, the RF switch can be implemented with a more simple summon structure.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a structure of an RF switch using a conventional pushpin and showing a state in which a magnetic force of a solenoid does not occur.

Figure 2 is a cross-sectional view showing the structure of the RF switch using a conventional push pin showing a state when the magnetic force of the solenoid does not occur.

 3 is a cross-sectional view when a magnetic force is not applied in the RF switch for providing a stable contact force according to an embodiment of the present invention.

4 is a cross-sectional view when a magnetic force acts on the RF switch for providing a stable contact force according to an embodiment of the present invention.

 5 is a perspective view of a sliding member according to an embodiment of the present invention.

Claims (8)

A sliding member made of metal; A guide member for guiding movement of the sliding member; And Including a solenoid for providing a magnetic force to the sliding member, The sliding member moves in the vertical direction along the guide member according to whether or not the magnetic force is generated in the solenoid, the elastic member is coupled to the guide member spanning, the sliding member generates a magnetic force from the solenoid In the case of the RF switch of the simplified structure characterized in that the elastic member descends while shrinking and the magnetic force disappears from the solenoid is returned to its original state by the restoring force of the elastic member. delete The method of claim 1, The sliding member has a 'C' shape and comprises a horizontal upper portion, a vertical portion and a horizontal lower portion, the horizontal upper and horizontal lower portion of the RF switch having a simplified structure characterized in that a hole for coupling to the guide member is formed. delete The method of claim 1, The guide member further comprises a solenoid coupling portion projecting vertically from a predetermined portion of the guide member, the solenoid is RF switch of the simplified structure, characterized in that supported by the solenoid coupling portion. The method of claim 3, And a push rod and a contact lead coupled to a lower end of the push rod, wherein a pressing member is coupled to a horizontal lower portion of the sliding member, and the pressing member presses the push rod in response to the movement of the sliding member. RF switch with simplified structure. The method of claim 6, The pressurizing member of the RF switch of the simplified structure, characterized in that it comprises a leaf spring. Upper plate; Bottom plate; A guide member coupled to the upper plate and the lower plate in a vertical direction; Solenoids; A sliding member coupled to the guide member and moving in a vertical direction according to the magnetic force of the solenoid; And a pressurizing member coupled to the sliding member to press the push rod according to the magnetic force of the solenoid.

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