JPS5847681Y2 - Multiple variable resistor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multiple variable resistor configured so that three sets of variable resistors can be operated separately by one operating shaft.

Due to front space limitations for car radios, etc., the variable resistors used are small 1- to 2-axis multiples, and are used to adjust the volume balance, volume, treble, bass, and sound quality of 2- to 4-channel speakers.
Multifunctional controls such as power switches are required.

Conventional multiple variable resistors include single-axis multiple type and two-axis variable resistor.
There is a multiple-shaft type, and it was common to have a single-shaft multiple type with two to four variable resistors operated in conjunction with each other at the same time.

Here, in the 2 (heavy) axis multiple type, one to several variable resistors can be operated on each of the two axes, but in this case, two legitimate children are required, and there is also a range that can be operated separately. One to several variable resistors can be operated separately on each of the two axes, but the multi-axis type has problems such as a decrease in strength such as rotational torque strength, failures due to the complicated structure, and increased costs.

It is also a mini and has a single shaft, which is always engaged with the variable resistor closer to the bearing, and by pushing the shaft, you can adjust the variable resistor farther from the bearing, and by stopping the shaft, it is always engaged with the variable resistor closer to the bearing. There is an idea to adjust the variable resistor that is closer.

A conventional example is the invention of US Pat. No. 3,373,393.

Other ideas in this direction include Utility Model Publication No. 52-41075 and Utility Model Publication No. 53-23547.

FIG. 7 shows the invention of Utility Model Publication No. 52-41075 as a conventional example.

Nowadays, multiple variable resistors, including the attached switches, are required to have more functions, be easier to use, and have fewer failures.

This was difficult or impossible with conventional structures.

This invention is based on the desire to reduce the number of knobs on a set for radios, stereos, etc., and to create a multiple variable resistor that is smaller, including front space for sets with limited front panels such as car radios, and requires fewer knobs. This is the answer.

The present invention further expands the functions of the conventional multiple variable resistor.

That is, (1) the present invention uses variable resistors (hereinafter simply V, R) on one axis.
), three functional groups A, B, and C including switches and the like can be operated individually or in combination.

(2) The present invention slides the shaft in the axial direction, so that the functional group A or B can be operated at any time at two stable articulated positions.

(3) In addition to the above (2), the present invention allows adjustment of functional group C, which is not always engaged, by pushing the shaft in the axial direction against biasing pressure.

(4) The present invention improves the operability of conventional multiple variable resistors.

(5) The present invention provides a variable resistor that is small, relatively easy to manufacture, and has excellent strength and reliability.

Regarding (2) above, the present applicant's Utility Model Application No. 51-
Although the invention of No. 78945 is used, it does not necessarily have to be this invention as long as the same purpose can be distantly related.

Each component in an embodiment of the present invention will be explained below with reference to the drawings.

FIG. 1 is an external view of the present invention, and FIG. 2 is an explanatory cross-sectional view thereof.

FIGS. 3A to 3D show the standard components of each unit variable resistor constituting the multiplex variable resistor.

Each component is thus essentially the same as a conventional variable resistor component of this type.

Here, each part has a slightly different shape depending on the purpose of use and the like.

In Figure 3, 10 is an insulating substrate such as Bakelite, the opening 1B is the resistor fixed or coated above, and the IC is connected to the resistor 1B and current collector 1D to the insulating substrate 1A.
Terminal to be fixed to, second 1D is conductive spring current collector, E is 20
70 is a rotatable sliding member made of plastic molding or the like, and 1H is a resistor 1B and sliding electronic 1D fixed to the sliding member 70. A spring slider that slides into engagement with the spring slider.

Here, the structure of the slider 70 differs slightly depending on the purpose of use, and the structure with a clutch mechanism is, for example, 70 shown in Figure 6.
It will look like C.

FIGS. 4A to 4H show some of the dedicated parts of the multiple variable resistor shown in FIG. 1.2.

In the same figure, 2 in A is a mounting frame made of a metal plate, and 4 in A is a mounting frame made of a metal plate.
2 is a bearing, 2 is a mounting fixing plate 5 that engages with the mounting frame 2 at the left end in FIG. 2 and fixes the multiplex variable resistor, and E is engaged with a second shaft 50, which will be described later, at the left end in FIG. The return spring 6 that always biases the shaft 50 to the right is shown.

Figures 5A to 5C show parts related to the central shaft of the multiple variable resistor.

Referring to FIG. 2, A is a first shaft 40 that engages with an operation knob (not shown) on the right end of FIG. , C are held with a limit in the axial direction between the insulating substrate 10A of the variable resistor A at the right end in FIG.
The articulation spring 47 that engages with the articulation engagement portion 43 on the left side of 0 is shown.

FIG. 6 il 2 shows a clutch relationship diagram, and with reference to FIG. The inner surface of the recess is the clutch serration 76C.

C shows a clutch 80 fixed to the right end of the second shaft 50, and 2 shows a clutch 90 fixed to the left end of the second shaft 50.

Next, a first embodiment of the present invention will be described with reference to the drawings.

R2 and R3 of the first stage V and R have a known special structure having a pair of resistors, and are used for adjusting high-pitched sound quality, etc.

R2 and R3 may be double variable resistors if there are no size restrictions.

R2 and R3 are referred to as variable function section A.

The first shaft 4 on the bearing side shown in FIG. 5A engages with R2 and R3.
0 is from the right end of the knob retaining portion 41. Following this is the shaft portion 42, a portion of which is hollowed out for grease retention and smooth operation.

On the left side of the shaft portion 42, there is provided an articulating engagement portion 43 that engages with an engaging portion 48 of an articulating spring 47 shown in FIG. A drum-shaped cam portion 43A, an articulated groove portion 43C on the left side thereof, and a slide small diameter portion 43 on the right side with a small diameter and long in the axial direction.
It has B.

Non-circular portion 45 at the left end of the collar portion 44 at the left end of the first shaft 40
is the non-engaging circular hole 65 in the center of the clutch 60 shown in FIG.
is engaged and fixed.

The sliding children 70A of the variable function section A, ie, R2 and R3, are substantially similar to the sliding children 70C shown in FIG.

Clutch serrations 76A are provided on the inner surface of the center hole recess on the left side of the sliding member 70A, and the clutch serrations 66 on the outer surface of the right end of the clutch 60 fixed to the left end of the first shaft 40 are different from each other in FIG. The clutch is engaged when the first shaft 40 is fully tensioned.

FIG. 2 shows a case where the clutch is disengaged.

When the first shaft 40 is pulled from this position, the clutch is engaged and the articulated portion 48 of the articulated spring 47 engages with the adjustment groove 43C of the first shaft 40 through articulation with the shaft cam portion 43A and is locked. be done.

In this position, the first shaft 40 engages with the variable function parts A, that is, R2 and R3, and can perform adjustments and the like.

Next, when the first shaft 40 is pushed to the left, the drum-shaped cam portion 4 of the shaft
3A, the engagement portion 48 of the articulation spring 47 is located near the left end of the small diameter portion 43B of the articulation portion of the shaft 40, and the first shaft 40 abuts (energizes) the second shaft 50, and the spunong 6 Locked by pressure.

In this position, as shown in FIG. 2, the right side outer surface engagement clutch serration 66 of the clutch 60 at the left end of the shaft 40 is disengaged from the center hole inner surface clutch portion 76A of the sliding member 70A of A, and the clutch The center hole inner side clutch serration 62 on the left side of 60 engages an outer side clutch 80 fixed to the right side of the second shaft 50 .

In FIG. 2, F indicates a clutch mechanism case.

The above is referred to as a first clutch mechanism 60. A switch section SW is provided on the left side of the fork F, and engages with the rotation of the second shaft 50 to open and close the power supply using a known mechanism using a rotary switch cam 70E.

R4 and Rs on the left side of SW are two volume adjustment variable resistors, which adjust the volume at the same level in 2 to 4 channels over a wide range of about 0 to -70 dB.

The SW, R4, and R5 are so-called Guyang variable resistors that are engaged with the same second shaft 50, and are connected to the switch cam 70.
E and the sliding members 70B and 70C are connected to each other as one body.

The above is referred to as variable function section B.

Here, the second axis 50 has a non-circular portion 55 on the right side.
A clutch 80 shown in FIG. Fixed in a way.

The sixth stage R6 and R7 are variable resistors for bass adjustment, and are similar to the V and R of the first stage R2 and R3, but the direction of installation of the variable resistors is opposite, and the slider with the clutch is The moving child 70A is almost the same as the sliding child 70C shown in Figure 6.

Here, R6 and R7 are referred to as variable function section C.

Referring to FIG. 2, when the first shaft 40 is pushed against the return spring 6, the second shaft 50 that comes into contact with it is pushed to the left, and the clutch 90 is activated by the sliding member of the variable function section B. 70C is disengaged and the clutch serration 76A of the sliding member 70A of the variable function section C on the left thereof is disengaged.

The above is referred to as a second switching clutch mechanism 90.

At this point, if you let go of the first shaft 40, the connection with C will be lost.
It engages with B again and returns to the state shown in FIG.

Here, the clutch serrations of the second clutch mechanism 90 and the like at the rear end of the second shaft 50 are not engaged with serrations parallel to the axis on the inside and outside of the cylindrical side surface as shown in the figure, but between mutual serrations on a plane perpendicular to the axis. It may be a guarantee of .

The return spring 6 that engages with the second shaft 50 and always biases it to the right side has types 6K and 6L shown in Fig. 4E, and the type 6L on the left end of the second shaft 50 in Fig. 2. In addition to the position, it may be placed between the cam 80 at the right end of the second shaft 50 and the corresponding sliding member 70 or switch cam 70E on the left side as shown in 6K, or it may be placed between the cam 80 at the right end of the second shaft 50, as shown in 6K. It may also be inserted as shown in 6L'.

The above methods 6K and 6L' are convenient when a functional part including a switch is further provided at the left end of the second shaft.

The present invention further expands the functions of the conventional multiple variable resistor.

That is, (1) the present invention can operate three functional groups A, B, and C, including variable resistor switches, etc., individually or in combination with one shaft; (2) the shaft can be slid in the axial direction; (3) In addition to (3) above, by pushing the shaft in the axial direction against the biasing pressure, the function group A or B can be operated at any time with two stable articulation positions. Functional groups C that do not match can be adjusted, and C can be used as a semi-fixed resistor.

As described above, the operability of the conventional multiple variable resistor is improved, and a variable resistor that is small, relatively easy to manufacture, and has excellent strength and reliability is provided, and its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the same side, FIGS. 3 to 6 are parts diagrams, and FIG. 7 is a conventional example. 1A: Insulating substrate, 1B: Resistor, 1C: Terminal, 1D: Current collector, 1H: Spring slider, 2: Mounting frame, 4: Bearing, 5:
Mounting fixing plate, 6: Return spring, 10: Insulating board, 20: Insulating case, 40: First shaft, 41: Knob engaging part, 42:
Shaft portion, 43: Articulating engagement portion, 43A: Drum-shaped cam portion, 43B: Small diameter portion, 43C: Articulating groove portion, 44: Flange portion,
45: Non-circular portion, 47: Articulation spring, 48: Engagement portion, 50
: 2nd shaft, 55: Non-circular part, 60: Clutch, side: Clutch mechanism, 62: Clutch serrations, 65: Non-circular hole, 66: Clutch serrations, 70: Sliding child, 7
0A, 70 B, 70 C, 70D: Sliding child, 70
E: Rotating switch cam, 76: Clutch serrations,
80: Clutch, 82: Clutch Serration, 86:
Non-circular hole, 90: Clutch, holder: Switching clutch mechanism, 9
2: Clutch serration, 96: Non-circular hole, R1-R
7: Variable resistor, A, B, C: Variable function section, SW: Switch section, F: Clutch mechanism section case.

Claims (4)

[Scope of utility model registration request] (1) In a multiple variable resistor having variable function parts A, B, and C in sequence when viewed from the mounting surface, the first shaft 40 is supported through the bearing 4 and fixes a knob that is slidable in the axial direction. Two articulation locking parts and a subsequent pushing part are provided in response to the pushing of the shaft by the moderation sliding mechanism, and a second shaft 50 is provided concentrically with the first shaft 40 and independently at the rear thereof. A first switching clutch mechanism 60 that engages between the rear end of the variable function section A and the front end of the second shaft 50 is disposed at the rear end of the shaft 40, and a variable mechanism section is disposed at the rear end of the second shaft 50. A second switching clutch mechanism 90 that engages between B and C is provided, and the second shaft 50 is always biased back toward the first shaft 40 to engage with the variable function group B. A multiple variable resistor provided with means 6. (2) At the articulated position where the first shaft 40 is located closest to the bearing 4, the first shaft engages only with A, and when the first shaft is pushed into the next articulated position, the first shaft 40 becomes the second shaft. 50, and then by further pushing the first shaft 40, the second shaft 5
0 is a multi-variable resistor according to claim 1, which engages only with variable function section C. (3) Engagement part 48 of articulation spring 47 installed with a limit in the axial direction between the bearing 4 and the variable function part A closest to the bearing
An articulated engagement portion 43 is provided at the rear of the first shaft 40 to engage with the first shaft 40;
The articulation engaging part 43 has a drum-shaped cam part 43A, an articulation groove part 43C on the rear end side, and a small diameter part 43B on the opposite side that is small in diameter and long in the axial direction. The multiple variable resistor according to item 1. (4) The clutch 60 fixed to the rear end of the first shaft 40 has clutch serrations 62 parallel to the axis on the inner surface of the cylinder that engage the clutch 80 fixed to the front end of the first shaft 50 on the rear end side.
and a clutch serration 66 parallel to the axis of the cylindrical outer surface that engages with the clutch serration 76A of the slider receiver 70A of the variable function part A.