JPS5832251Y2 - 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 in car radios, etc., the variable resistors used are small 1- to 2-axis multiplexes for volume balance, volume, treble, bass, and tone quality adjustment 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 multi-shaft type, and the single-shaft multiple type usually has two to four variable resistors operated in conjunction with each other at the same time.

Here, the 2 (heavy) axis multiple type can operate one to several variable resistors on each of the two axes, but in this case, two handles are required, and the range that can be operated separately is Also, 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, and a complicated structure that causes failures 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 can be miniaturized, 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) in the present invention, three functional groups A, B, and C including variable resistors (sometimes abbreviated as V, R), switches, etc. can be operated individually or in combination on one axis.

It also has a functional group D that engages the outer shaft as a double shaft.

(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 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, the shape of each part varies depending on the purpose of use and the like.

In Figure 3, 10 in A is an insulating substrate such as Bakelite, 1B in the opening is the resistor fixed or coated above, and 10 in C
is a terminal for fixing the resistor 1B and current collector 1D to the insulating substrate 1A, 2nd 1D is a conductive spring current collector, 20 is an insulating case made of plastic mold etc. and covers the insulating substrate, 70 is plastic mold etc. 1H is a spring slider that is slidably engaged with the resistor 1B fixed to the slider 70 and the slider 1D.

Here, the structure of the sliding member 70 differs for each unit depending on the purpose of use, and for example, the sliding member 70 with a clutch mechanism is
It will look like C.

FIGS. 4A to 4E show some of the exclusive parts of the multiple variable resistor shown in FIGS. 1 and 2.

In the same figure, 2 in A is a mounting frame made of a metal plate, 3 in the opening is an outer shaft, 4 in C is a bearing, and 2 is the left end in Fig. 2 that engages with the mounting frame 2 and connects a multiple variable resistor. The fixing plate 5 is fixed, and ``E'' indicates a return spring 6 at the left end in FIG. 2 that engages with a second center shaft 50, which will be described later, and always urges the center shaft 50 to the right.

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

Referring to FIG. 2, A indicates a first center shaft 40 that engages with an operation knob (not shown) on the right end of FIG. 2, and a second center shaft 5 engages with a second function group B on the left.
0 and C indicate an articulating spring 47 that is held in the case of the variable resistor R1 at the right end in FIG.

Fig. 6 Ill. 2 shows a clutch relationship diagram, and with reference to Fig. 2 I shows the clutch 60 fixed to the left end of the first center shaft (sha), the mouth shows the R5 sliding child 70C, and the left side of the The inner surface of the center recess is the clutch serration 76C.

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

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

In FIG. 2, R1 is the variable resistor closest to the bearing 4, and is operated by the outer shaft 3 equipped with a slider 70D to which a slider 1H is fixed.

A resistor 1B is fixed to the insulating substrate 10D of R1 by terminals 10 and the like at both ends thereof.

The slider 1H slides on the resistor 1B.

A case 20D, which also serves as a rotation stopper, covers the entire body.

Here, R1 itself may be a double variable resistor.

R1 is referred to as a variable function section.

Here, it is used for audio stereo volume balance, etc.

Next, R2 and R3 of the second stage V, R, are v, Ro of a known special structure having a pair of resistors, and are used for high-pitched sound quality adjustment, etc.

R2 and R3 may be double variable resistors if there is no size restriction.

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

The first center shaft 40 on the bearing side shown in FIG. 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 is an articulation spring 47 shown in FIG. 5 held in the case portion 20D of the variable resistor R1.
It has a drum-shaped cam part 43A, an articulating groove part 43C on the left side thereof, and a slide small diameter part 43B having a small diameter and long in the axial direction on the right side. There is.

A non-circular portion 45 at the left end of the flange portion 44 at the left end of the first center shaft 40 is engaged with and fixed to a non-circular retaining hole 65 at the center of the clutch 60 shown in FIG. 6A.

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.

A clutch serration 76A is provided on the inner surface of the center hole recess on the left side of the sliding member 70A.
The clutch serrations 66 on the outer surface of the right end of the clutch 60 fixed to the left end of the clutch 60 engage with the clutch when the first center shaft is pulled to the maximum in FIG.

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

When the first center shaft is pulled from this position, the clutch is engaged and the articulation spring 470 articulates the articulation portion 48 with the shaft cam portion 43A, and then connects to the articulation groove 43C of the first center shaft.
is engaged and locked.

In this position, the first center shaft 40 is connected to the variable function section A, that is, R2, R.
Adjustment etc. can be performed by engaging with 3.

Next, when the center shaft 40 is pushed to the left, the drum-shaped cam portion 43 of the center shaft
Beyond A, the engaging 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 center shaft 40, and the first center shaft 40 comes into contact with the second center shaft 50 to reduce the pressure of the spring 6 at the left end. locked by

In this position, as shown in FIG.
is the clutch portion 76A on the inner surface of the center hole of the sliding member 70A of A.
The inner side clutch serrations 62 of the left center hole of the clutch 60 engage with the outer side clutch 80 fixed to the right side of the second center shaft 50.

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

The above is referred to as a first clutch mechanism 60.

Further, a switch section SW is provided on the left side of F, and is engaged with the rotation of the second center shaft 50 to open and close the power supply using a known mechanism using a rotary switch cam 70E.

R4 and R5 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 -7Q DB.

The SW, R4, and R5 are so-called Guyang variable resistors that are engaged with the same second center shaft 50, and are a switch cam 70E and a sliding member 70B, respectively.

70C are bonded together into one body.

The above is called variable function section B.

Here, the second center shaft 50 has a non-circular portion 55 on its right side, and a clutch 80 shown in FIG.
A clutch 90, which is almost similar to the above but has clutch serrations 92 on both outer surfaces as shown in FIG. 6, is fixed in the same manner on the left side.

The seventh stage R6 and R7 are variable resistors for bass adjustment, and are similar to the V and Ro of the second stage R2 and R3, but the installation direction of the variable resistors is opposite, and the sliding The 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 center shaft is pushed against the return spring 6, the second center shaft 50 that comes into contact with it is pushed to the left, and the clutch 90- is connected to the sliding member 70 of the variable function section B. When the clutch with C is disengaged, the sliding child 70 of the variable function section C on the left
A's clutch serrations 76A are engaged.

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

If you let go of your hand at this point, it will be disengaged from C and will be reengaged with B, returning to the state shown in Figure 2.

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, and the Function group A or B can be operated as desired at any time in two stable articulation positions, and (3) can be constantly engaged by pushing the shaft into the operator of (2) above in the axial direction against the biasing pressure. It is possible to adjust the function group C that does not have the function group C, 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 the drawing]

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, 3: Outer shaft, 4:
Bearing, 5: Mounting fixing plate, 6: Return spring, 10: Insulating board, 20: Insulating case, 40: First center shaft, 41: Knob engaging part, 42: Shaft part, 43: Articulating engaging part, 43A :
Drum-shaped cam portion, 43B: Small diameter portion, 43C: Joint groove portion, 4
4: Brim portion, 45: Non-circular portion, 47: Articulating spring, 48:
Engagement portion, 50: Second center shaft, 55: Non-circular portion, 60: Clutch, 60: Clutch mechanism, 62: Clutch serrations, 65: Non-circular hole, 66: Clutch serrations, 7
0: Suridoshi, 70 A, 70 B, 70 C, 70
D: Sliding child, 70E: Rotating switch cam, 76: Clutch serrations, 80: Clutch, 82: Clutch serrations, 86: Non-circular hole, 90: Clutch, 90
: Switching clutch mechanism, 92: Clutch serration, 9
6: Non-circular hole, R1-R7: Variable resistor, A, B, C:
Variable function section, D: Variable function section, SW: Switch section, F:
Clutch mechanism case.

Claims (5)

[Scope of utility model registration request] (1) In a two-shaft multiple variable resistor having variable function parts D that sequentially engages the outer shaft 3 and A, B, and C that engage the center shaft 40 when viewed from the mounting surface, the outer shaft 3 is supported through the The first center shaft 40, which fixes a knob that can be slid in the axial direction, is provided with two articulation locking portions and a subsequent push-in portion in response to the pushing of the shaft by a moderation sliding mechanism, and the first center shaft 40 A second central shaft 50 is provided concentrically and independently at the rear thereof, and a first switching member is provided at the rear end of the first central shaft 40 to engage between the rear end of the variable function section A and the front end of the second central shaft 50. A second switching clutch mechanism 90 is provided at the rear end of the second center shaft 50 to engage between the variable function parts B and C, and the clutch mechanism 60 is provided with a second switching clutch mechanism 90 that engages between the variable function parts B and C. first center shaft 40 for engaging the functional group;
A multiple variable resistor provided with return biasing means 6 in the direction. (2) At the articulation position where the first center shaft 40 is located closest to the bearing 4, the first center shaft engages only with A, and when the first center shaft is pushed into the next articulation position, the first center shaft 40 moves to the second center shaft. 50, and then by further pushing the first center shaft 40, the second center shaft 50 engages only with the variable function part C. variable resistor. (3) The articulation engagement part 43 is attached to the rear part of the first center shaft 40 by engaging with the engagement part 48 of the articulation spring 47 installed with restrictions in the axial direction in the case 2OD of the outer shaft variable resistor. A multiple variable resistor according to claim 1, which is provided with a utility model. (4) Request for utility model registration in which the articulation engaging portion 43 has a drum-shaped cam portion 43A, an articulation groove portion 43C on the rear end side, and a small diameter portion 43B on the opposite side that is small in diameter and long in the axial direction. 2. The multiple variable resistor according to item 2. (5) The clutch 60 fixed to the rear end of the first center shaft 40 has a clutch 80 fixed to the front end of the first center shaft 50 on the rear end side.
Clutch serrations 62 parallel to the axis of the inner surface of the cylinder that engages with the axis, and clutch serrations 66 parallel to the axis of the outer surface of the cylinder that engages the clutch serrations 76A of the sliding member 70A of the variable function part A. A multiple variable resistor according to range 1.