JPH03245502A - Enclosed variable resistor - Google Patents

Abstract

PURPOSE:To make it possible to perform a variable sliding movement in an accurate and excellently smooth manner by a method wherein an insulation resistance substrate is pinchingly fixed to the intermediate part of an apparatus, and one surface of a resistor is formed in an airtight state in a hermetic space located between the apparatus and the substrate. CONSTITUTION:An airtight space (b) is provided between the bottom face of a case 1 and the substrate 9 of a resistor (a), a metal case 12, on which a sliding strip groove 11 is provided on the surface side of the non-resistor of the substrate 9, is coated on the insulating case 1, and the substrate 9 is fixed to the intermediate part of the resistor in a pinched manner. A set of magnets S and N are attracted arranged in a transformer pinching the front and back sides of the substrate 9, and the magnet piece N on the front side of a case 12 is fittingly fixed in such a manner that the surface of the non-resistor of the substrate 9 is slidingly moved against a non-magnetic slider 14 equipped with a control lever 13 which is passed through the sliding groove 11. A metal sliding piece 15, which is brought into contact with the surface of a resistor (a), is adhered to the resistance surface of the substrate 9, and a magnet piece S on the rear side is provided in such a manner that it is variably slided in an airtight space (b) under magnetic attraction in accordance with the sliding movement of the slider 14 of the front side magnet piece N.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to sliding and rotary variable resistors.

(Conventional disadvantages) Among conventional variable resistors, there are sealed types in which the resistor part is sealed, but the variable resistance mechanism inside the container is complicated and manufacturing is not easy, so the production cost is low. high,
There are difficulties in miniaturization and an absolutely sealed configuration, and there are drawbacks to moisture, secondary gas, and dust intrusion through small gaps.
In particular, in the case of a sliding type variable resistor, it is difficult to completely seal it due to the presence of the sliding groove on the operating lever, and it is vulnerable to moisture and dust, so poor contact between the slider and the resistor In addition, because the slit holes in the slide groove face outward, children may insert coins into the slit holes and cause electric shocks, causing social problems. As a result, there is a trend not to use sliding variable resistors in TVs and other devices.

(Problems to be Solved by the Invention) The present invention enables the resistance board to be easily placed in an intermediate state within the body of a sliding type or rotary type variable resistor, and also allows the resistor portion to be placed in a sealed enclosure. A pair of magnet pieces are used to sandwich the resistor part of the resistor board, and a very smooth and stable variable resistance is created by the suction movement of the magnet pieces in the sealed space. Close,
In addition to ensuring safety against intrusion problems such as moisture and dust and the above-mentioned coin countermeasures, it also ensures simplification of the mechanism and ease of production, making downsizing and low-cost mass production advantageous, and ensuring long-term safety. The purpose of this invention is to provide an economical and highly demanded sealed variable resistor that can be safely used in televisions and the like.

(Means for solving the problem) The present invention has the above features! The means to solve one problem are as follows.

A non-magnetic resistance board with a resistor on one side is installed inside the vessel with a space above and below and the resistor side is sealed, and a set of magnet pieces is placed between both sides of the board. They are arranged by adsorption to each other, and one of the magnet pieces facing the resistor side is attached with a metal slider that slides on the resistor, and the other magnet piece is attached to an operating member from outside the device. This feature is characterized in that the magnet piece on the resistor side is attracted and slid against the resistor body in response to the movement of the magnet piece on the side, thereby producing variable resistance.

(Function) The present invention magnetically incorporates a set of magnet pieces into the resistor part of a non-magnetic resistor board that is hermetically installed in the sealed space of the container body by sandwiching the resistor part of the core board. Following the operation movement of the magnet piece attached to the operating member, a metal slider that slides on the resistor is attached and the slider comes into contact with the resistor in the sealed space, attracted by the magnetic force. The magnetic piece inside the sealed space will attract and slide, and the smooth movement of the magnetic piece will produce an accurate variable resistance effect.The magnetic sliding of the magnetic piece in the sealed space will prevent humidity, It is completely unaffected by oxidizing gas, and there is no problem with the intrusion of dust, etc., so it is performed accurately, smoothly, and with good sliding performance, and the variable resistance performance is stable and long-term unchanged. In addition, the resistance board can be installed in a sealed manner in the intermediate part of the container body simply by designing the container body to be a sealed type with an intermediate combination.

In addition, especially in the case of a sliding variable resistor, the resistor surface of the resistor board is placed face down with respect to the slide groove to form a sealed space between the bottom surface of the device and the coin to enter through the slide groove. However, since the electric shock only hits the non-resistance surface of the board, there is no risk of electric shock.

(Example) Example 1. An embodiment of the present invention relating to a sliding variable resistor will be described below with reference to FIGS. 1 to 4.

Rectangular insulation case (fitting protrusion (2) on part of the upper side of IJ)
A carbon resistor (
3), a silver resistor (4) +4), and a conductive layer (5) are printed on one side, and a connection terminal (6) (force (8) is attached to the end of the resistor a). The case (non-magnetic insulation resistance board (9) longer than II)
, with the protrusion (2) of the case (1, 1) on its -long side.
Provide a recess 0■ for locking the recess 0■, fit the protrusion (2) in the recess 1 (IIK), and place the resistor a side face down toward the bottom of the case (IJ), with both sides By protruding from both sides of the case txt and mounting it in a shoe-like manner,
The substrate of the resistor a portion facing the bottom surface of the case 111 (
9), and a metal case U with slide grooves perforated on the non-resistance side of the substrate (9) is attached to the insulating case (1). Then, the substrate (
9) is clamped and fixed to the intermediate part of the container, and inside the container, a pair of magnet pieces S and N are sandwiched between the front and back surfaces of the substrate (9).
The magnetic piece N on the front side inside the metal case α2 is placed under the operation lever through the slide groove 01).
The non-magnetic slider α (a) provided with a 13 Attach a metal slider 0 that contacts the resistor a to the surface by pasting or metal vapor deposition, and then attach the slider 0 of the front side magnet piece N.
The magnet piece S on the back side is arranged so as to slide with variable resistance within the sealed space under magnetic attraction according to the sliding operation of the magnet.

Example 2. An embodiment of the present invention relating to a rotary variable resistor will be explained below with reference to FIGS. 5 to 7.

A carbon resistor (3) with a horse 2Φ shape on the surface and a main terminal (4
) (Print a resistor a consisting of a conductive layer (5) on 41 and the center, and connect terminals on the ends! 61 (7)
A horse-shaped non-magnetic insulation resistance substrate made by depositing (8)
9, the terminal (61 (7) +81 part is placed in a protruding shape outside the device, and the mounting leg of the metal case a ~ is covered with a circular insulating case (■) for the case cover above the board (-). The pieces (21) and 21) are engaged and attached to form a sealed space between the ceiling surface of the insulating case cover and the board 0 part of the resistor part A facing the board. α9 is clamped and fixed to the intermediate part of the body, and inside the body, a pair of magnet pieces S and N are adsorbed and placed between the front and back surfaces of the substrate α9, and the magnet piece N on the back side inside the metal case 08 is Operation axis Q6)
The carbon resistor (3) and the conductive layer (5) are placed on the rotor plate with a stopper attached to the rotor plate.
The non-resistance surface of 19 is fixed so as to slide, and the corresponding substrate U
A metal slider 0SI that contacts the carbon resistor (3) and the conductive layer (5) is attached to the resistor side of the resistor a by pasting or metal vapor deposition on the surface facing the resistor a. According to the rotational trajectory of the rotor plate (2), under magnetic attraction, the slider slides on a variable resistance by contacting the slider across the resistor a within the sealed space. It is constructed by disposing a magnet piece S on the front side.

Note that a well-known case design in which the outer periphery is covered with metal by a split insulating case body can also be adopted as the vessel case.

In addition, the magnet piece N on the rotor plate @ side may be covered with a separate non-magnetic cover in order to avoid magnetism with the metal case (2), or the magnet piece N on the rotor plate @ side may be covered with a separate non-magnetic cover. Although it is conceivable that the metal case Q2゜■ in the second embodiment be made of a non-magnetic material, there is no particular need to do so. The @ in FIG. 5 indicates the stopper wall against which the acid rotor plate C221 comes into contact.

Next, an example of the slider for the magnet piece S on which the variable resistance is slid is as follows. Metal sliding element 05 with one strip of narrow wire
).

2. In Fig. 9, there is a recess c! on one side of the magnet piece S!
A slider Q5) made of a carbon material such as a chevron shape and having a size such that the top side protrudes outward is pasted and fitted therein.

3. In FIG. 10, a metal brush (19) is pasted and fitted into the recess C4).

In addition, in the present invention, if the conductive band is divided into left and right parts and the magnet of the slider material is moved by magnetic force, it is turned on.

Since it acts as an OFF switch, it can also be applied to a slide switch.

In short, the present invention provides an insulated resistance substrate (9) with a resistor a printed on one side of the intermediate portion of the body of either a sliding type or a rotary type variable resistor.
, (II are clamped and fixed, and the substrates (9) and (1
! Forming a sealed space between the A side of the resistor 1 and the container body, and directing the A side of the resistor into the space,
The resistor a in the device is sealed, and the substrate +91 in the device is sealed.
A pair of magnet pieces S on the front and back sides of H.

N is adsorbed and arranged, and the magnet piece S is attached to the resistor a.
A slider is attached to the holder, and by using the magnetic force of the magnet, the operating movement of the magnet piece N on the operating member side attracts and follows the magnet piece S on the resistor a side within the sealed space, thereby creating a variable resistance. In the case of the sliding type according to the first embodiment, the mutual magnet pieces S and N move laterally, and in the rotary type according to the second embodiment, they move in a circular orbit.

The part a of the resistor placed in the sealed space O is unaffected by moisture and has no infiltration of sludge gas or dust, so the variable sliding of the magnet piece S within the space O is unaffected by moisture. is carried out accurately and smoothly without any problems.

It should be noted that the negative side of the pair of magnet pieces S and N can be made of a magnetic material such as iron, but mutual magnets have stronger mutual magnetic attraction and are more practical.

(Effects of the Invention) The present invention has the above-described configuration and operation, that is, by sandwiching and fixing the insulation resistance substrate (9), (1! The sealed space between them can be easily sealed, and as a result of utilizing the magnetic attraction movement of a pair of magnet pieces S and N that sandwich the groups &(9) and (11), the sealed space can be sealed. The movement of the magnet piece S in the middle opening is not affected by moisture and there is no intrusion of dust, etc., which eliminates the causes of poor contact and noise, making it extremely accurate.
Smooth variable sliding can be performed, the variable resistance performance is completely stable, and long-term constancy is ensured. In particular, in the case of a sliding type, even if there is a slide groove 0υ, the resistance element aij
Since i′I is a closed type on the face-down side, the corresponding article fsQll
There is no risk of electric shock even if a coin is inserted. Therefore, it can be safely used on televisions, etc., and is completely safe against coins.

In addition, the body design for sandwiching and fixing the substrate (9) and α9 to the intermediate part of the body is simple, and since a pair of magnet pieces S and N are used, the entire mechanism can be simplified, and manufacturing is easy and inexpensive. Not only is it suitable for mass production, it is also advantageous for miniaturization, and in particular, the use of the magnet piece S for attaching the metal slider 05) as shown in Fig. 8 simplifies the slider mechanism, making it extremely compact. The product can also be provided economically and has extremely high demand.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 to 4 show a slide type variable resistor according to the embodiment 1.0, FIG. 1 is a cross-sectional view, FIG. 2 is a sectional view, and FIG. The figure is an exploded perspective view of the insulation case and insulation resistance board, Figure 4 is a cross-sectional view of A-Bl in Figure 1,
Figures 5 to 7 show the rotary variable resistor of Example 2, Figure 5 is a front view, Figure 6 is an enlarged right side view of a partial cross section of the vessel body, and Figure 7 is Enlarged plan view of insulation resistance board, Figure 8-
Figure g10 is an enlarged perspective view of each embodiment of the magnet piece with a slider. (1) (a)...Insulation case, AO/resistor, (9)
(J, 9... Insulation resistance board, S, N... 1 set of magnet pieces bas, sealed space, aυ... Slide groove, (12101!-- Metal case, 03I, meeting・Operation lever, 04J0 ・Non-magnetic slider, 09...-
Rotor plate with metal seeding.

Claims (6)

[Claims] (1) A non-magnetic resistance board with a resistor on one side is installed inside the vessel with a space above and below the resistor side sealed, and a set of magnets is placed between both sides of the board. The pieces are arranged by adsorption to each other, one of the magnet pieces facing the resistor side is attached with a metal slider that slides on the resistor, and the other magnet piece is attached to an operating member from outside the vessel, in a sealed space. A sealed variable resistor characterized in that a magnet piece on the resistor side is attracted and slid against the resistor in accordance with the movement of a magnet piece on the operating member side to perform variable resistance. (2) In a sliding variable resistor in which the resistance board is rectangular and the operating member is an operating lever that slides in the sliding groove of the metal case, place the non-magnetic resistance board with the resistor surface facing the bottom of the insulating case. A claim in which the substrate is placed face down with the resistor side sealed inside a container, and a pair of magnet pieces are arranged to attract each other by sandwiching both sides of the substrate, and the variable resistance is created by suction and sliding. The sliding variable resistor in item (1). (3) In a rotary variable resistor in which the resistance board is a non-magnetic circular plate and the operating member is a rotating operation shaft with a rotor plate attached with a stopper, with the resistor surface of the resistance board facing down toward the operation axis, According to claim (1), the resistor side is sealed in a container and the substrate is installed, and both sides of the substrate are sandwiched and a pair of magnet pieces are arranged to attract each other, and the variable resistance is created by the attraction and sliding of the magnet pieces. Rotary variable resistor. (4) The sealed variable resistor according to claim (1), wherein the slider attached to the magnet piece on the resistor side is a carbon slider. (5) The sealed variable resistor according to claim (1), wherein the slider attached to the magnet piece on the resistor side is a metal brush slider. (6) The sealed variable resistor according to claim (1), wherein either one of the set of magnet pieces is made of a magnetic material such as iron.