KR890005360B1 - Variable capacitor - Google Patents

Abstract

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Description

Variable Capacitor

1 is an exploded perspective view of a VR with a VR with SW showing an embodiment of the present invention.

2 is a cross-sectional view of the recessed part.

* Explanation of symbols for main parts of the drawings

1: Variable capacitor 1a, 1g: Terminal

1b: float shaft 1c, 1d: electrode

1e, 1i: External projecting terminal 1f: Ear lead

1h: All boards 1j: Switch switching position

2: sliding receiver 2a: protrusion

2b: shaft insertion hole 3,4: sliding part

3a, 3b, 4a, 4b: Sliders 3c, 4c: mounting holes

5: Board 5a: Terminal Insertion Hole

5b, 6a: Shaft insert hole 5c: Element attaching part

6 Element 6b Terminal Mounting Hole

6c: resistive layer 6d: current collector layer

7: terminal 7a: protrusion

8 switch 9 variable resistor

10: Sliding group 11: Element group

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable capacitor line, and more particularly, to a variable capacitor in which a variable resistor and a switch, which are capable of switching on and off and changing a capacitance of a capacitor, a resistance of a variable resistor, and a switch on and off are uniaxially installed. .

Examples of products in which variable capacitors are well used include acoustic products such as radio receivers or cassette decks with radios. In recent years, the miniaturization of these acoustic products has been promoted and the density of the products has been promoted. At the same time, the demand for multifunction devices such as reception of TV voice bands has increased. In order to achieve this multifunctionality, a variable resistor is assembled and integrated into the variable capacitor, and a variable resistor is attached to the rotor shaft and the coaxial which constitute the variable capacitor in order to achieve high density and multifunction. The so-called variable capacitor with variable resistor is already commercialized.

In general, in a radio receiver or a cassette deck with a radio resistor using a so-called variable capacitor with a resistor, the variable capacitor of the variable capacitor with a variable resistor is used for the AM band of the radio frequency, the FM band, and the VHF band of the TV audio frequency. It is configured to be used for UHF band of TV audio frequency.

In recent years, however, in the case of a TV with a radio receiver, the reception of the AM and FM bands is handled by the variable capacitor due to the problem of the TV's scale characteristics or the image processing after the tuning, and the VHF band and the UHF band of the TV audio frequency are variable resistors. I'm in charge of. When the variable resistor is used in the VHF band as described above, since the frequency between the three and four channels is greatly separated, in order to make the scale characteristics from one channel to twelve channels evenly spaced, three channels can be used by using a separately attached switch or the like. It is designed to switch the tuning voltage or circuit between and 4 channels.

However, separately installing the switch requires a drive mechanism that operates the switch synchronously with a variable capacitor with a variable resistor. In addition, in the scale plate, the accuracy that can be switched between 3 and 4 channels is required, and the variation of the quality and precision of the variable capacitor with the variable resistor and the switch also adds nonuniformity of the drive mechanism. there was.

In the prior art as described above, there is a problem in increasing the density of the product, reducing the number of assembling labors, improving the switching accuracy, and increasing the manufacturing cost of the product by requiring a switch drive mechanism.

The present invention has been made in view of the problems of the prior art, and its object is to provide a variable capacitor with a variable resistor with a switch that is rich in versatility and low in product cost and assembly cost.

According to the present invention, a variable resistor's slider and a switch's slider are mounted on a rotor shaft which is a drive shaft of the variable capacitor, and a change in the capacitance of the variable capacitor, a resistance of the variable resistor, and an on / off switch of the variable capacitor are caused by the rotation of the rotor shaft. Each is done.

According to the present invention, since the rotor shaft of the variable capacitor, the variable resistor, and the drive shaft of the switch are coaxially assembled with a sliding group on the drive shaft, the capacity change, the resistance change, and the switch on / off can be simultaneously performed on one axis. The drive mechanism for synchronously operating the switch and the variable capacitor with the variable resistor is unnecessary, contributing to the increase in the density of the product or the reduction of the assembly labor, and the switch switching accuracy can be improved.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 and 2 show a variable capacitor with a variable resistor with a switch (hereinafter abbreviated as a VR with a VR with SW) according to an embodiment of the present invention. FIG. 1 is an exploded perspective view and FIG. 2 is a sectional view of the main portion.

In FIG. 1 and FIG. 2, the VR with SW is composed of a small variable capacitor 1 using a film (not shown) as a dielectric, a switch 8 and a variable resistor 9, and a switch 8 ) Contacts the pair of electrodes 1c and 1d formed on the upper surface of the entire substrate 1h of the variable capacitor 1 and the pair of electrodes 1c and 1d, respectively, to contact the electrodes 1c and 1d. The variable resistor 9 includes the elements 6 having the substrate 5, the resistive layer 6c, and the collector layer 6d. It consists of the sliding seat 2 which contact | connects this resistance layer 6c and the collector layer 6d, and the slide 3a, 3b for conducting both is fixed. In FIG. 1, a rotor shaft 1b and a stator plate (not shown) for rotating the rotor plate (not shown) disposed in the variable capacitor 1 are placed above the all substrates 1h of the variable capacitor 1. A plurality of terminals 1a constituting the supporting posts and conducting with each stator plate protrude. The positions of the rotor shaft 1b and the terminal 1a and their respective spacings are standardized for attachment to an acoustic device or for connection to a circuit board (not shown). For the so-called general purpose variable capacitor 1 Or it is formed so that it may become constant regardless of a color player (number of polar bands).

The electrodes 1c and 1d constituting the switch 8 are formed on the upper surface of the entire substrate 1h of the variable capacitor 1 by, for example, insert molding, and the electrode 1d is the variable capacitor 1. Is formed in a substantially donut shape around the rotor shaft 1b, and the electrode 1c is formed in a substantially semicircular shape on the outside of the electrode 1d so that the switch 8 is in a conductive state of a predetermined angle range. The external output terminals 1e and 1i of the electrodes 1c and 1d are bent approximately vertically at the outer edge portion 1k of the entire substrate 1h of the variable capacitor 1 and along the side of the variable capacitor 1. As shown in FIG. 1, it is formed to protrude below the variable capacitor 1. 1j is a switch switching position, and 1f is an lead.

되어 있다. 또 접동자 받이(2)의 대략 중앙부에는 가변콘덴서(1)의 로우터 샤프트(1b)가 삽입되는 샤프트 삽입공(2b)이 형성되어 있고 샤프트 삽입공(2b)에는 로우터 샤프트(1b)가 압입 고착되어 있다.The slide group 10 is provided with a slide 2 and projections 2a for attaching the slide pieces 3 and 4 on both sides of the slide. Moreover, it has the attachment holes 3c and 4c. In addition, the slide member 2 is fixed to the slide pieces 3 and 4 having the slides 3a, 3b, 4a, and 4b for constituting the switch 8 and the variable resistor 9, respectively. The sliding pieces 3 and 4 are mounted on the sliding receiver 2 and then deadlocked by the projections 2a of the sliding receiver 2.

It is. In addition, the shaft insertion hole 2b into which the rotor shaft 1b of the variable capacitor 1 is inserted is formed in the substantially center portion of the sliding receiver 2, and the rotor shaft 1b is press-fitted to the shaft insertion hole 2b. It is.

In the element group 1, the resistive layer 6c is formed on the outer side, and the current collector layer 6d is formed on the inner side, respectively, and an element 6 having four terminals 7 and a substrate 5 in which the element 6 is stored and held. The shaft insertion hole 6a in which the rotor shaft 1b which is the drive shaft of the variable capacitor 1 is inserted in the substantially center part of the element 6 is formed. The substrate 5 has an element attachment portion 5c for holding the element 6 therein, a shaft insertion hole 5b through which the rotor shaft 1b can be inserted at the center thereof, and a terminal of the variable capacitor 1 at the outer edge thereof. A plurality of terminal insertion holes 5a that can be press-fitted into 1a are formed. The shaft insertion hole 6a of the element 6, the shaft insertion hole 5b of the board | substrate 5, and the terminal insertion hole 5a are connected to the rotor shaft 1b and the terminal 1a of the variable capacitor 1, respectively. It is disposed at a corresponding position, and is held and housed so that the resistance layer 6c and the current collector layer 6d formed on the element 6 are lowered, and the terminal 1a is pressed into and fixed to the terminal insertion hole 5a. .

Therefore, as described above, the variable capacitor of the present invention press-fits the rotor shaft 1b into the shaft insertion hole 2b of the sliding receiver 2 on the side where the rotor shaft 1b of the variable capacitor 1 protrudes, The variable capacitor 1, the switch 8, and the variable resistor 9 are integrated by pressing the terminal 1a into the terminal insertion hole 5a of the substrate 5. In this case, the variable capacitor 1 and the switch 8 and the variable are formed only by forming the shaft insertion hole 2b in the sliding receiver 2 and forming the terminal insertion hole 5a in the substrate 5. The resistor 9 can be integrated, and since the shaft insertion hole 2b of the slide receiver 2 and the rotor shaft 1b of the variable capacitor 1 have a press-fit structure, the rotor shaft 1b is rotated so that the resistor 9 can be integrated. The rotor plate (not shown) in the variable capacitor 1 and the sliding members 3a, 3b, 4a, and 4b fixed to the sliding receiver 2 rotate in conjunction with each other to change the capacitance of the variable capacitor 1 and switch. The on / off of (8) and the resistance value change of the variable resistor 9 can be simultaneously performed coaxially with the rotor shaft 1b.

As described above, the electrode of the switch is formed on the entire board of the variable capacitor, the element group of the variable resistor is mounted on the terminal of the variable capacitor, and the sliding group of the variable resistor is pressed into the rotor shaft of the variable capacitor, and the rotor shaft is rotated. Capacity change and switch on. According to the variable capacitor of the present invention, which can be performed by interlocking off and change of resistance value, the drive mechanism for synchronously operating the switch and the variable capacitor with the variable resistor in the product is unnecessary, thus increasing the density of the product and reducing the assembly labor. This has the practical effect of improving the switch switching accuracy.

Claims (2)

In a variable capacitor capable of changing the capacitance value by the rotation of the rotor shaft, the rotor shaft of the variable resistor and the switch of the switch is mounted on the rotor shaft, the capacity change of the variable capacitor and the resistance value of the variable resistor by the rotation of the rotor shaft. With the switch on. A variable capacitor characterized in that the off can be performed. The method of claim 1, wherein the electrode of the switch is formed on all the substrates of the variable capacitor, the element group of the variable resistor is mounted on the terminal of the variable capacitor, the rotor shaft is formed to serve as a drive shaft of the variable resistor and the switch, A variable capacitor, characterized in that the sliding shaft is fixed to the driving shaft and the sliding support to which the sliding member is fixed to turn on / off the switch for changing the resistance of the variable resistor.

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