JPS593527Y2 - Preset variable resistor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a preset type variable resistor, and provides a variable resistor that can simplify the configuration of selecting a plurality of slide bodies for presetting a resistance value, each of which slides on a resistor body. The purpose is to

As a conventional preset type variable resistor, there is a multiple screw type variable resistor shown in FIG. 1, which is applied to electronic tuners for televisions, radios, etc., for example.

In the figure, the multiple screw type variable resistor 1 has an arrow A on the top surface of the board 2.
, for example, four pairs of resistive films and electrode films (both not shown) for different channels are printed in the B direction, and the frame 3
A screw shaft (both not shown) is supported by each of the screw shafts (both not shown) which are in common contact with the resistive film and the electrode film, and on which a slide body having an indicator 4 is screwed.

Numerals 5 (5, to 54) are knobs, each having a tapered portion 5a and a stopper portion 5b as shown in FIG.
It is supported concentrically with each of the screw shafts and biased in the direction of arrow A by a spring 7.

8 is an interlocking plate, which has convex portions 8a on both sides supported by the frame 6;
The tip claw portion 8b is urged to rotate clockwise in FIG. 2 by the spring 9, and is brought into contact with the tapered portion 5a.

In the above configuration, when a desired knob 51 is pushed in the direction of arrow B, the interlocking plate 8 is guided by the tapered portion 5a and rotated counterclockwise, and then the stopper part 5b is pushed by the bias of the spring 9. Once engaged and positioned, the knob 5 abuts the concentric screw shaft and at the same time the circuit is closed.

Subsequently, when the knob 51 is rotated, the screw shaft rotates together, the slide body slides in the directions of arrows A and B, and the desired resistance value is preset.

Next, push in the other knob 5□ in the same way, and the above knob 5
As in the case of □, after the interlocking plate 8 rotates, the claw portion 8b is engaged with the stopper portion 5b of the knob 5°, so that the knob 5° can rotate integrally with the screw shaft.

However, at this time, the knob 5 is disengaged from its stopper portion 5b and claw portion 8b by the rotation of the interlocking plate 8, and slides back to the position shown in FIG. 2, thereby opening the circuit.

Therefore, in the above configuration, when any one of the four knobs 5□ to 54, each of which performs a different preset, is pushed in to perform the above preset, the other knobs that had been pushed in until then are slid back in conjunction with each other. This improves operability without the need to take the trouble of sliding the unnecessary knob 5 back.

After pressing the four knobs 5□ to 54 once to preset their respective resistance values, it is sufficient to simply press the knobs when selecting a channel.

According to the above-mentioned conventional example, since a plurality of resistive films are printed on one substrate 2, the formation of each resistive film tends to vary, making it difficult to maintain compatibility in the display of the knobs 5□ to 54. Moreover, the interlocking mechanism using the interlocking plate 8 has a complicated structure and is expensive, and the interlocking plate 8 is long and easily twists, making it difficult to adjust the position with the knobs 5□ to 54. However, although the knobs 5 and 54 can perform both interlocking and resistance value presetting functions,
The band changeover switch has to be provided separately, which has the disadvantage that its functionality is limited.

The present invention eliminates the above-mentioned drawbacks, and each embodiment thereof will be described below with reference to the drawings.

3 and 4 are an overall perspective view and an exploded perspective view, respectively, of one embodiment of the preset type variable resistor according to the present invention.

In the figure, a preset type variable resistor 11 is applied to, for example, the above-mentioned electronic tuning tuner, and has a case 12, which has a positioning pin 13 and a convex portion 14 on the bottom surface, and pedestals 15 at both ends. A pair of retaining arms 16 are provided at each of the retaining arms 16.

Reference numeral 17 denotes a substrate, on the upper surface of which a resistor/body 18 of a predetermined length, a manual electrode 19, and three band switching electrodes 20a to 20C are printed or pasted in parallel to each other.

The substrate 17 is positioned and placed on the upper surface of the case 12 by the pins 13 and the convex portions 14, and each film-like component 18, 19 .
Terminals 21 projecting downward from the case 12 are electrically fixed to both ends of the terminals 20a to 20c.

22 is a holding plate, each having a pair of engagement holes 23 and a pulley shaft 24;
, each pedestal 15 of the case 12 has a guide plate support hole 25.
The engagement hole 23 and the engagement arm 16 are elastically engaged with each other and bolted together to be attached to the chassis of the application set.

In this case, a pulley 32 is supported by a screw 31 on the pulley shaft 24 on the left side of the pair of holding plates 22 in FIGS. It is wound and stretched with a predetermined tension, and the support hole 25 on the left side of the figure
A guide plate 34 is fitted and fixed to.

35 is a plurality of slide blocks, as shown in Fig. 4, Fig. 5 A,
As shown in B, a block body 36, an arm block 37, and an interlocking holder 38, each made of resin, are integrally assembled.

The block body 36 has a pair of left and right V-shaped portions 39 in the recess 39.
a, and a guide hole 40a is provided in the right wall portion 40 in the figure.
A guide groove 40b, a lower end guide convex portion 40d of the hole 40C1 are provided, and a guide groove 41a and a pair of U-shaped notches 41b are provided in the left wall portion 41 in the figure.

Furthermore, a pair of thin metal plates 42 and 43 are integrally molded into the lower part of the main body 36 as shown in FIG.
The contact portion 42a is exposed in the inner portion, and the movable contact portion 42b is exposed in the lower portion of the thin plate 43. The contact portion 43a is exposed in the recess 39, and the contact portion 43b is exposed in the upper portion of the guide convex portion 40d.

The arm block 37 is approximately U-shaped, and has an upper elastic arm portion 44 provided with a tip claw portion 44a, three click positioning convex portions 44b, and a push button portion 44C, and a lower arm portion 45.
A guide recess 45a is provided in the guide recess 45a, and the movable contact 51 is fitted and fixed to the lower surface of the guide recess 45a.

The interlocking holder 38 has a square hole 52 passing through the upper part,
A notch groove 52a is provided on the front surface of the square hole 52.

Therefore, the upper plate part 53 is elastically displaceable in a cantilevered manner, and further has a through hole 53a in the center.

Further, the holder 38 has a negative engagement claw 54 projecting from the left side surface in the figure, a negative groove 55 on the front surface, and a two-pronged movable contact 57 accommodated in a recess 56 on the lower surface.

Next, the assembly of the slide block 35 will be explained.

First, the guide hole 40a of the block main body 36 is guided into the guide plate 34, and the - tensioned part of the thread 33 is inserted into the pair of U-shaped notches 41b, and the guide hole 40a is inserted in the direction of arrows C and D. Install so that it can slide freely.

At this time, the movable contact portion 42b comes into elastic contact with approximately the right half of the resistor 18 as shown in FIG. 5B.

Next, the interlocking holder 38 is inserted into the recess 3 of the block body 36.
A click spring 58 is inserted into the groove 55 from the front, and both ends of the spring 58 are respectively locked to a pair of V-shaped portions 39a.

At this time, the spring 58 is elastically displaced upward in an arcuate manner to position the holder 38, as shown in FIG.
The movable contact 57 is close to and separated from the pair of contact parts 42a and 43a, and the lower surface of the engaging claw part 54 has a U-shaped notch 41b.
It is close to the inner thread 33.

Next, the arm block 37 is fitted into the block main body 36 from the right side in the figure by guiding the guide recess 45a of the lower arm 45 into the guide protrusion 40d, and the upper arm 44 is sequentially inserted into the groove 40b, the hole 40C, and the holder. 38 square holes 52, grooves 41
Fit and insert a into place.

When the arm portion 44 inserts and protrudes through the square hole 52, the tip claw portion 4
4 a comes into contact with the upper plate part 53 and once elastically displaces it upward, and then returns to the displacement, so that when the arm block 37 is subsequently slid in the directions of arrows E and F in the figure for band switching, the claw part 44 a The upper plate portion 53 is brought into contact with the upper plate portion 53 to prevent unnecessary slippage.

While the arm block 37 is sliding in the directions of the arrows E and F, the upper end of the movable contact 51 of the lower arm portion 45 is always in sliding contact with the contact portion 43 b of the contact plate 43 .

If the arm block 37 is pushed into the block body 36, for example, to the innermost position, the protrusion 44b on the rootmost side of the arm portion 44 is click-locked and positioned in the hole 53a of the upper plate portion 53, and the movable contact 51 comes into elastic contact with the innermost electrode 20a.

Thus, the assembly of the slide block 35 and its board 1
7 is completed, and a plurality of other slide blocks 35 are fitted and assembled into the guide plate 34 in the same manner as shown in FIG.

At this time, each slide block 35 has the thread 33 inserted through the gap between the U-shaped notch 41 b and the retaining claw part 54, and the desired convex part 44 b of the arm block 37 is connected to the upper plate part 53 as appropriate. The movable contact 51 is easily aligned and elastically contacted with the desired electrode 203-20C by clicking into the hole 53a.

In FIG. 5B, 59 is a sliding block for manual operation with a pair of movable contacts 60.6 that are electrically connected to each other.
1, and each of the contacts 60 and 61 is supported by being threaded through a rotatable screw shaft, for example, in a state in which the contacts 60 and 61 are in elastic contact with the left half of the resistor 18 and the manual electrode 19, respectively.

Therefore, in addition to performing preset channel selection, which will be described later, using the plurality of slide blocks 35, a predetermined dial is rotated to rotate the screw shaft and the slide block 59 is slid in the directions of arrows C and D in FIG. The desired box can be manually selected by varying the resistance value.

In addition, in order to slide the slide block 59, the method is not limited to the screw shaft method described above, but the slide block 59 is locked to a thread stretched in the same manner as the thread 33, and the thread is driven by dial operation. The block 59 may be slid.

A schematic circuit configuration of the seventh mother resistor 18, the plurality of preset slide blocks 35, and the - manual operation slide block 59 is shown.

Next, the presetting operation of the presetting variable resistor 11 having the above configuration will be explained.

First, each of the plurality of slide blocks 35 in FIG.
With the desired band selected, each arm block 37
Hold the push button 44C and slide it appropriately in the direction of arrow C9D in the figure to preset the resistance value of the desired box.

Next, when the push button part 44C of the arm block 37 of the predetermined first slide block 35 is pushed, the upper arm part 44
is elastically displaced downward from the position shown in FIG. 6A to the position shown in FIG. 6B, and the holder 38 is integrally moved downward.

Accordingly, the spring 58 is pressed by the engaging claw portion 54 and is inverted in a click-like manner from an upwardly arched state to a downwardly arched state, and the holder 38 is also moved downwardly in a clickly manner to be positioned.

Thus, the contact 57 of the holder 38 is connected to the contact portion 42 a , 4
3a, and the movable contact portion 42b and the movable contact 51 are closed via this.

When the upper arm 44 reaches the position shown in FIG. 6B, it hooks the thread 33 and bends it downward to increase the tension of the thread 33 as a whole.

In this way, a desired box of a desired band is selected by simply pressing the push button 44C.

To select another channel using the second slide block 35, press the push button 44 of the iron slide block 35.
When C is pressed, the arm portion 44 and the holder 38 move downward in unison in the same way as in the above case, and the spring 58 is click-inverted in a downward arcuate manner to position the movable contact portion 42b and the movable contact 51. becomes conductive and the desired box of the desired band is selected.

At this time, the arm portion 44 is also connected to the thread 33 as shown in FIG. 6B.
Since the hook is bent downward, the thread 33 has a greater tension than when the first slide block 35 is operated, and this tension becomes greater than the spring force of the spring 58.

Thus, the arm portion 44 of the first slide block 35 is
From the state shown in Figure B, the spring 58 is pushed up by the tension of the thread 35.
is again elastically returned to the upward arcuate shape and returns to the state shown in FIGS. 5B and 6A, and the contacts 42b and 51 are switched open, resulting in a non-tuning state.

In this way, the plurality of slide blocks 35 are sequentially pressed on the button part 44.
When a channel is selected by pressing C, the previously selected station is automatically turned into a non-selected state due to the tension of the string 33, which is extremely convenient.

Moreover, the interlocking mechanism using the thread 33 can be adjusted during configuration and assembly (
It is simple (it is only necessary to vary the tension of the thread 33).

Further, the slide block 35 has three functions: resistance value setting, interlocking, and band switching by the arm block 37, which is convenient.

That is, with regard to band switching, if each slide block 35 is made to select a desired band in advance, there is no need to perform any particular band switching work during channel selection.

FIGS. 8 to 10 show various other embodiments of the preset type variable resistor of the present invention, and in each figure, the same parts as in FIG.

In FIG. 8, the variable resistor 71 has no manual channel selection function, and the board 72 is the same as the board 17.
Compared to the above, the manual electrode is removed and the width of the resistor 73 is approximately halved.

In FIG. 9, the variable resistor 74 only needs to tune the negative band, and the substrate 75 is provided with only the electrode 76 for the negative band.

In FIG. 10, the variable resistor 77 removes the manual operation function and only needs to select the negative band.
The substrate 78 includes the resistor 73 in FIG. 8 and the electrode 7 in FIG.
6 can be provided.

11 and 12 respectively show other embodiments of the slide block of the variable resistor of the present invention, and in each figure, FIGS.
Components that are the same as those in FIG.

This slide block 81 has a pair of lateral arm parts 41C provided in the left wall part 41 of the block body 36 instead of the U-shaped notch 41b, and a long-dimension elastic material instead of the thread 33. A shaped metal foil 82 is inserted between the arm portion 41C and the engagement claw portion 54 of the holder 38.

In this way, both ends of the metal foil 82 are positioned on the holding plate 22 in FIG. 3, and a plurality of slide blocks 81 are slidably preset at desired positions in the middle thereof as described above.

Therefore, as in the embodiment shown in FIG.
2b and 51 are electrically connected, and the metal foil 82 1 is deflected in a clicking manner, and the portion of the metal foil 82 corresponding to the other slide block 81, which had been in the electrically conductive state, elastically returns to its contact point 42b. , 51 are opened in conjunction with each other.

Note that this slide block 81 can also be used individually in place of the slide block 35 in FIGS.

FIGS. 13 and 14 respectively show other embodiments in which the interlocking mechanism using the thread 33 is applied.

In FIG. 13, the operating unit 91 includes three operating blocks 92.

Reference numeral 93 denotes a block body, which has a pair of stopper portions 94 a and 94 b in a recess 94 and a pair of opposing V-shaped portions 94 C, and is provided with a pair of grooves 95 on its upper surface.

96 is a slider, which includes a push button portion 96a, a pair of convex portions 96b,
The grooves 9 (each having a C1 recess 96 d and the switch block 93 ) are accommodated in the recess 94 .

At this time, the click spring 97 is housed in the groove 96C with its both ends tightened to the V-shaped portion 94C, and normally the spring 97 is elastically displaced in the downward arcuate shape of the 13th section, causing the slider 96 to move as shown by the arrow. It is energized in the G direction to bring the convex portion 96b and the collar portion 94a into contact with each other.

Reference numeral 98 denotes a thread of approximately the same material size as the thread 33 mentioned above, which is inserted into the groove 95 of the block body 9 of the three actuating blocks 92 and the slider 9.
The four parts 96d of 6 are sequentially inserted in common, and both ends thereof are set to have a predetermined tension.

For example, in FIG. 13, when the slider 96 of the central operating block 92 is slid in the direction of the arrow H by operating the push button 96a, the spring 97 is reversed into an upward arcuate shape and the convex portion 96b is It comes into contact with the stopper part 94b and stops, and the thread 98 is also locally deformed into a curve.

Next, for example, the slider 9 of the actuation block 92 on the left in the figure
6 in the direction of arrow B, the spring 97 is also reversed and becomes in the same state as the center block 92, but instead the tension of the thread 98 becomes excessive and the center block 92
The curved portion at is deformed and returned to a straight state.

Therefore, the slider 96 slides back in the direction of arrow A, the spring 97 reverses again, and the convex portion 96 b becomes part of the stopper 94.
Returns to contact with a.

According to the above structure, the thread 98 has exactly the same function as the thread 33 shown in FIG. 4, and the thread 98 is not limited thereto, and can be replaced with the metal foil 82 shown in FIG. 11.

As an example of actual use of the above operating unit 91, it can be applied to the variable resistor 11 shown in FIG. 3, for example.

In this case, each block 92 is preset arranged so as to be slidable in the directions of arrows C and D by a predetermined guide means (not shown) in FIG. 3, and a pair of movable contacts ( If the switch (not shown) is made conductive only when the slider 96 is pushed in, preset channel selection will be possible in the same way.

Further, the actuation unit 91 can also be used in various other types of multiple bush switches, multiple lever switches, and multiple slide switches.

As described above, according to the variable resistor of the present invention, the resistor and the electrode body are arranged extending in a predetermined direction relative to each other on the upper surface of the substrate, the actuating part that can be actuated in a click manner, and the resistor and the electrode body, respectively. A plurality of slide bodies are preset at predetermined positions so as to be slidable to predetermined positions above the substrate, each having a pair of contacts that are in sliding contact with the body at all times and are closed and opened to each other by the operation and return of the actuating part. , which has a predetermined tension above the substrate and is stretched in contact with the actuating portion of each slide body, and when the actuating portion of either slide body is actuated, one pair of the slide bodies of - A tensioning member that is pressed and deformed by the actuating part to increase the tension with the closing of the contact of the other slide body, and causes the actuating part of the other slide body to return to operation in conjunction, thereby opening the pair of contacts of the iron base. Because it is composed of
If a plurality of slide bodies are preset at predetermined positions, the desired resistance value can be obtained by simply pushing the actuating part of any one of the slide bodies, making the operation extremely simple. - When the actuating part of the slide body is activated, the actuating parts of the other slide bodies are returned to operation in conjunction with the tension member, so there is no need to perform the work of restoring the actuation, and the work is particularly easy when changing the resistance value sequentially. Further, since the plurality of slide bodies are interlocked with each other by the tension of the tension member, the structure and assembly work such as adjustment of the tension are simple and costs can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 are an overall perspective view and a side view of the main parts of a multi-screw type variable resistor to which a conventional example of a preset type variable resistor is applied, and Figures 3 and 4 are respectively the invention developed by the present invention. FIGS. 5A and 5B are an overall perspective view and an exploded perspective view of one embodiment of the preset variable resistor, and FIGS. Diagram A. B is a longitudinal cross-sectional side view taken along line VIA-VIA in FIG. 11 and 1 are longitudinal sectional front partial views of various other embodiments of the resistor.
Figure 2 is an exploded perspective view of another embodiment of the slide block and a vertical front partial view of a variable resistor to which the slide block is applied;
FIGS. 13 and 14 are a plan view and a plan view of an operating unit to which the interlocking mechanism of the slide block is applied, respectively.
FIG. 3 is an exploded perspective view of the operating block of FIG. 1... Screw type variable resistor, 2.17, 72,
75.78... Board, 5 (5□~54)...
...Knob, 8...Interlocking plate, 11.71.7
4゜77...Preset variable resistor, 12.
...Case, 18.73...Paper antibody, 19.
20 a to 20 C, 76-... electrode, 33.
98... Thread, 34... Guide plate, 35
,59.81...Slide block, 36.9
3...Block body, 37...Arm block, 38...Interlocking holder, 40.41
...Wall part, 41 b...Notch, 42
．． 43... Metal thin plate, 42a, 42b,
43 a, 43 b...contact part, 44 C,
96a...Push button part, 51.57, 60.61.
...Movable contact, 54...Engagement claw portion, 58
．． 97... Click spring, 82... Metal foil, 91... Actuation unit, 92...
・Operation block, 96...Slider.

Claims (1)

[Scope of utility model registration request] A resistor and an electrode body are arranged extending in a predetermined direction from each other on the upper surface of the substrate, an actuating part that can be actuated in a click manner, and an actuating part that is in constant sliding contact with the resistor and the electrode body, respectively, and that the actuating part can be activated and returned to operation. a plurality of slide bodies each having a plurality of slide bodies each having a preset position above the substrate so as to be slidable in the predetermined direction; and a plurality of slide bodies each having a predetermined tension above the substrate. and is stretched in contact with the actuating portion of each of the slide bodies, and is pressed by the actuating portion without closing a pair of contacts of the slide body when the actuating portion of any one of the slide bodies is actuated. A preset type variable resistor comprising a tensioning member that is deformed to increase tension and return to operation in conjunction with the operating parts of other sliders to open a pair of contacts on a steel slider. vessel.