JPS5818172Y2 - switch operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch operation device, and particularly provides a device suitable for a band changeover switch of a radio receiver.

Conventionally, in this type of device, by operating a plurality of rotary knobs for FM, MW, and SV, the band switching slide changes according to the amount of movement of the slider that engages with these knobs and moves. By moving the movable terminal of the switch, the desired band (mode) can be selected.

However, since it is common for each knob to have one slide switch (ie, slider), a plurality of slide switches are naturally required to perform band switching in multiple stages.

Therefore, these slide switches have disadvantages in that the space factor is poor and the space is large, and the number of parts is large, which complicates assembly and increases cost.

The present invention has been devised to correct the above-mentioned deficiencies, and it is possible to reduce space, reduce the number of parts, simplify assembly, and reduce costs.

Next, an embodiment in which the present invention is applied to a radio receiver will be described with reference to the drawings.

FIG. 1 shows the front side of a cabinet 11 of a radio receiver 1 according to this embodiment, and shows a small hole 2 for guiding sound from a speaker (not shown) to the front, a volume adjustment knob 3, A sound quality selection knob 4, frequency selection knobs 5, 6, and 7, a push button 12 for unlocking these knobs, a shortwave frequency selection knob 8, a tuning knob 9, and a rondo antenna 10 are provided, respectively.

The important structure of this embodiment is the knob for operating the band switching slide switch, that is, the switch operating member 5,
6.7 is also configured to be used as a power switch.

This will be explained in detail below, but first the configuration will be explained with reference to FIGS. 2 to 7.

The knobs 5, 6.7 are used for short waves, medium waves, and FM, respectively.
They are attached so that they can each rotate reciprocally about a common shaft, a support shaft 15 inserted into a bearing portion 14 provided integrally with the shaft.

A coil spring 16 (
(Fig. 3) is arranged, and as described later, the knob is 6°1.
During the forward movement, the spring 16 is compressed and deformed, and during the backward movement, the spring force of the spring 16 acts effectively.

A spring of a slider, which will be described later, acts on the knob 5, so that the power for turning the knob 50 times and the power for turning the knob 6 and 70 times by the spring 16 are equal to g.

That is, the spring 16 corrects the torque of the knobs 6 and 1 to be equal to that of the knob 5.

After this return movement, the projections 1T provided on the knobs 5, 6.7
hits the protrusion 18 on the chassis 13 side, so turn the knobs 5 and 6.
．． 7 is position regulated.

In addition, on the lower side of the operation part where the knobs 5, 6, and 7 are actually operated, there is a rectangular pressing plate part 19 for pressing the first switch part (described later), and a pressing plate part 19 (described later) extending downward at right angles to the rectangular shape. the second of
A press plate portion 20 for pressing the switch portion is provided.

The plate parts 19 and 20 are inserted into an opening 21 provided in the chassis 13, and the plate part 20 penetrates through the opening 21 and protrudes into the chassis 13.

Immediately next to the knob 7, a push button 12 is inserted into a through hole 22 provided in the chassis 13 to release the lock when the knobs 5, 6, 7 are moved forward and locked.

This push button 12 is always biased forward by a coil spring 23 placed between the actual operating part and the chassis 13, but is prevented from being removed from the through hole 22 by an integrally provided claw 24. There is.

Next, to explain each switch part of the power switch, on the lower side of the chassis 13, there are three contact terminals 25 and 26 made of leaf springs with spring force that constitute the first switch part 61, and a second contact terminal 25 and 26. Plate-shaped contact terminals 27 and 28 constituting the switch section 62 are respectively arranged.

These first and second switch sections constitute a power switch.

The terminals 25 and 26 are integrally fixed to the chassis 13 by conductive screws 29 on the outside of the chassis 13, and are bent into the chassis 13 midway, so that the tip of the bent portion of the terminal 25 is not normally held in place. 5, 6, 7 plate parts 19
The bent portion of the terminal 26 is located close to the lower surface of the terminal 26.
5, and has a small protrusion 30 at its tip.

Further, an insulating plate 31 is arranged between the terminals 25 and 26,
The terminal 26 is fixed without contacting the screw 29.

The terminal 27 on the second switch part side is also fixed to the chassis 13 together with the terminals 25 and 26 in a state in which the tip of the screw 29 is in contact with this, but is kept at a certain distance from the chassis 13 by a small protrusion 32 provided on the chassis 13. It is placed with

This terminal 21 is connected to each contact terminal 26 as shown in FIG.
It extends in the lateral direction between them, and both sides thereof are bent at right angles.

The folded portion 33 is shaped like a cylindrical piece (FIG. 5), and holes 34 and 35 are provided at each end of the folded portion 33.

On the other hand, the terminal 28 has a longitudinal shape that extends along the terminal 27 as a whole, and one end of the terminal 28 has projecting pieces 3 that are orthogonal to each other.
6 and 42 are provided. Of these, the protruding piece 36 is bent in a box shape along the terminal 27 and has a small protrusion 3T at the tip.

The terminal 28 itself is attached to an insulating holding plate 39 made of plastic. This holding plate is integrated with the terminal 28 by heat welding, and at both ends there are protrusions extending perpendicularly to the terminal 21 side. A pair of portions 40 are provided, and a protrusion 41 provided on each of these protruding portions is rotatably inserted into the above-mentioned hole 35 on the terminal 21 side.

Therefore, the holding plate 39 is held by the bent portion 33 of the terminal 27, and the holding plate 39 is moved around the protrusion 41 as shown by the arrow 43 (FIG. 5).
It can be rotated in any direction.

Further, a coil spring 44 is attached between the protrusion 38 of the holding plate 39 of the terminal 28 and the hole 35 of the bent portion 33 of the terminal 27, so that the terminal 28 is always biased counterclockwise together with the holding plate 39. , small protrusion 3 of protrusion 36 of terminal 28
T is configured to make contact with the terminal 21.

Further, the edge of the holding plate 39 has a curved inner surface and is configured as a claw-shaped stopper part 45, and this stopper part is close to the lower end of each of the pressing plate parts 20 of the knobs 5, 6, and 7 mentioned above. It is located.

Further, lead wires 46 and 47 are soldered to the terminals 26 and 28, respectively.

The slide switch 48 for band switching is a conventionally known one (the operation part 51 is a slider or switch held at four locations by guides and locking protrusions 49 provided on the inner surface of the chassis 13). It is coupled to actuating member 50 .

That is, the slider 50 is inserted between the chassis 13 and the protrusion 49, and is held by the protrusion 49 in the direction indicated by the arrow 5.
It can slide in two directions, and there is a screw 53 in the middle position.
An operating portion 51 for operating a movable contact of a slide switch 48 attached to a printed circuit board (not shown) is fitted into an opening 55 of an adjusting plate 54 fixed in place.

Further, as shown in FIG. 5, a coil spring 56 is attached between the right end of the slider 50 and the chassis 13.
As a result, the slider 50 is always biased to the left and is in contact with each of the plate portions 20 of the knobs 5 and 6 described above.

These plate parts are provided with projections 57 and 58 on the top and bottom for pressing the slider 50, but the slider 50
As shown in FIGS. 6 and 17, the tip thereof is a one-shaped pressed plate portion 59.

That is, the pressed plate portion 59 includes a short plate portion 59a that corresponds to the protrusion 57 of the knob 6, and a long plate portion 5 that corresponds to the protrusion 58 of the knob 5.
Therefore, the distance from the common support shaft 15 of the knobs 5 and 6 to the contact point of the pressed plate parts 59a and 59b with the plate part 20 is different between the knobs 5 and 6.

Next, the operation of the mechanism configured as above will be explained.

In this receiver, when the knobs 5, 6.7 are not operated, the slider 50 is located at the far left in FIG. 5, and the slide switch 48 is in the FM mode.

As shown in FIG. 6, the pressed plate part 59 of the slider 50 does not touch the plate part 20 of the FM knob 7, so to select the FM band,
The power switch can be turned on by pressing the knob 7 with a finger in the state shown in FIGS. 1 and 2.

Since the operation of this power switch is the same for each knob 5, 6.7, knob 6 will now be explained.

First, in the non-operating state shown in FIG.
1 is in the off state (that is, terminals 25 and 26 are not in contact),
The second switch section 62 is in the on state (i.e. the terminals 27, 28
is in contact).

When the knob 6 is pressed in the direction of the arrow 60 with the fingertip, the knob 6 resists the spring 16 (FIG. 3) and the shaft 15.
The lower end of the plate portion 20 first hits the upper end surface of the insulating holding plate 39 of the second switch portion 62 .

Next, when the knob 60 rotation force is further applied to the retaining plate 39, the plate part 20 rotates counterclockwise while being in secure contact with the retaining plate 39, and at the same time, the retaining plate 39, together with the terminal 28, rotates as described above. It rotates slightly clockwise about 41 as an axis.

In this case, since the lower end of the plate part 20 is somewhat rounded and the upper end of the retaining plate 39 is concave, the plate part 20
The lower end of the holding plate 39 rotates while smoothly sliding on the holding plate 39, and at the same time, the holding plate 39 rotates smoothly clockwise while being subjected to a pressing force by the plate portion 20.

When the knob 6 and the terminal 28 are rotated to the position shown by the dashed line in FIG. 8, the small protrusion 37 of the terminal 28 separates from the terminal 2T, so the second switch part 62 is turned off.
On the other hand, since the lower edge of the plate portion 19 of the knob 6 merely contacts the upper surface of the terminal 25, the first switch portion 61 is still in the OFF state.

However, if the knob 6 further rotates to the position shown by the two-dot chain line, the holding plate 39 rotates further clockwise while maintaining the engaged state with the plate portion 20, and the second switch portion 62 is rotated. Although the OFF state is still maintained, the end of the terminal 25 of the first switch part 61 is elastically deformed downward as shown by the two-dot chain line under the pressure of the plate part 19 of the knob 6, and finally Since the terminal 26 itself is elastically deformed by contacting the small protrusion 30 of the terminal 26, the terminals 25 and 26 come into strong elastic contact with each other, turning the first switch section 61 on.

When the knob 6 is further rotated while maintaining this state, the lower end of the plate portion 20 of the knob 6 passes over the tip of the holding plate 39.

At this moment, the retaining plate 39 rotates counterclockwise due to the spring force of the spring 44 attached between the retaining plate 39 and the bent portion 33 of the terminal 27, and as shown in FIG. The tip of the knob 39 enters the stepped portion 63 provided at the lower end of the plate portion 20 of the knob 6, and at the same time, the lower surface of the operating portion of the knob 6 hits the vertical wall portion 64 (see FIG. 3) provided on the chassis 13. Therefore, the knob 6 cannot be rotated any further.

As a result, the holding plate 39 moves back to its original position and the terminal 27
Then, the terminal 28 is brought into contact with the second switch part 6.
2 is returned to the on state, but the switch portion 61 of option 1 is in contact with the terminals 25 and 26 and maintains the on state.

In this case, the knob 6 tries to rotate clockwise due to the elastic restoring force of the spring 16 (see Fig. 3) and the terminals 25 and 26, but as shown in Fig. 9, the tip of the retaining plate 39 Because it enters the stepped portion 63 of the plate portion 20 and engages closely,
The knob 60 is prevented from rotating clockwise, and the state shown in Fig. 9 is reached.
That is, the locked state is maintained.

In this way, both the first switch section 61 and the second switch section 62 are turned on, so that the terminal 26→terminal 25→
Current flows through screw 29 → terminal 2T → terminal 28, and the power switch 75 turns on for the first time.

As is clear from the above description, when the knob 6 moves forward, the second switch section 62 is first turned off, then the first switch section 61 is turned on, and then the second switch section 62 is turned off. will be turned on and the power switch will be turned on.

This process can be summarized as follows.

Yock initial state Intermediate state←−−−−−−−−→Set−−−−→ First switch section 61 Off Off On On 2nd
ω IGATO 62 ON OFF OFF ON Next, to release the locked state of knob 60, that is, the on state of the power switch, press the lock release push button 12 described above in the direction of arrow 60 as shown in Fig. 3. , this lower end is the protruding piece 65 of the terminal 28
is pressed, the terminal 28 rotates clockwise again, and as a result, the engagement state of the tip of the retaining plate 39 with the stepped part 63 of the plate part 20 of the knob 6 is released, and the plate The lower end of the portion 20 passes over the tip of the retaining plate 39, and the spring 16
The knob 6 is restored to its original state all at once by the elastic restoring force of the terminals 25 and 26, returning to the state shown by the solid line in FIG.

If the pressure on the release push button 12 is removed, the spring 44
The terminal 28 is rotated counterclockwise to connect the terminals 2T and 2.
He will come into contact with 8 again.

Therefore, although the state of each switch part for unlocking operation follows exactly the opposite process to that described above, it will be understood that this unlocking can also be released by operating other knobs 5 or I. .

That is, for example, by pressing the knob 5 and using the plate portion 20, the ninth
If the holding plate 39 in the state shown in the figure is forcibly rotated clockwise, the knob 6 will be unlocked and can be moved back.
In this case, by further pressing the knob 5 after unlocking, the knob 5 can also be locked in the same manner as described above, and the sequence of unlocking the knob 5 → locking the knob 50 can be performed continuously.
Therefore, band selection, which will be described later, can be performed continuously.

Next, the relationship between each knob 5, 6.7 and band selection is shown in the 10th section.
The explanation will be centered on FIGS. 12 to 12.

As already mentioned, this embodiment is characterized in that the pressed plate portion 59 of the slider 50 of the slide switch 48 is configured in a special shape as shown in FIGS. 6 and 7.

Therefore, from the initial state (that is, the FM mode state), the first
As shown in FIG. 1, when the knob 6 for the MW band is pressed and rotated counterclockwise and locked as shown in FIG. 9, the projection 57 provided on the plate portion 20 of the knob 6 is simultaneously hits the pressed plate portion 59a of the slider 50, and the rotational force of the knob 6 is converted into linear movement of the slider 50.

Accordingly, the slider 50 is moved a predetermined distance in the direction of the arrow 66 against the spring 56, and then the slider 50 is held stationary, thereby selecting the MW band.

Also, after unlocking the knob 8, as shown in FIG.
If you press the knob 5 for the W band and turn it counterclockwise to lock it, the protrusion 5 provided on the plate part 20 of the knob 5 will lock.
8 hits the pressed plate portion 59b of the slider 50 and the force of the knob is converted into linear movement of the slider 50, moving the slider 50 a predetermined distance in the direction of the arrow 66,
This results in the selection of the SW band.

However, since the protrusions 5T and 58 of the slider 50 are at different distances from the shaft 15, which is the rotation point of the knobs 5 and 60 times, even if the knobs 5 and 6 are rotated by the same angle, the protrusions 57 and 58 are different distances from each other. The moving distances (that is, the lengths of the arcuate trajectories) of 58 should be different.

That is, since the movement distance of the protrusion 57 is shorter than that of the protrusion 58, the movement distance or stroke of the slider 50 in the direction of the arrow 66 due to the operation of the knob 6 is the same as the movement distance or stroke of the slider 50 in the direction of the arrow 66 due to the operation of the knob 5. shorter than the distance or stroke.

Therefore, depending on the shape of the pressed plate portion 59 of the slider 50, the MW band and the SW band can be selected extremely easily and accurately.

In addition, in FIG. 2, a switch 6I only for SW is provided on the chassis 13 side, but this is turned on by being pushed by the slider 50 that moves when the knob 5 is locked. In this on state, it is possible to further select a band within the short wave band by operating the aforementioned knob 8.

To return to the original FM mode, the knob 6 or 5 is unlocked, and the slider 50 is forcibly returned in the opposite direction to the arrow 66 by the elastic restoring force of the spring 560, as shown in FIG. This will return to the initial state shown in .

In this case, the restoring force of the spring 56 acts to further increase the restoring force when the knob 5 or 6 is unlocked.

Note that since the slider 50 is not in any contact with the plate portion 20 of the FM knob T shown in FIG. 10, the slide switch 48 is always in the FM mode when it is not operated.
Therefore, by operating and locking the knob 7, you can select the FM band by simply turning on the power switch.

On the other hand, in order to select the MW mode or SW mode, it is necessary to move the slider 50 a predetermined distance in the direction of the arrow 66, but this is done by operating as explained in FIGS. 11 and 12, and by turning the knob 5 or All you have to do is turn on the power switch using the lock shown in step 6.

As mentioned above, in the mechanism according to this embodiment, the band changeover switch and the power switch are linked with one knob, so that, for example, when switching from the MW mode to the SW mode, the power switch must be turned off before switching. is turned on (depending on the timing when the power switch is turned on), the slide switch 48 for band switching is turned on, for example, F.
M-) The state of switching from MW to SW can sometimes be recognized by the sound coming from the speaker.

That is, since the switching of the slide switch 48 cannot be done instantaneously from a structural standpoint, if the power is already on when switching from one band to the next, the sound from the former band will be heard when the latter band is selected. Therefore, noise will be generated when switching the switch, and the product value will be reduced accordingly.

However, in this embodiment, when switching from one band to another, first the knob plate 20 or the holding plate 3
By pressing 9, the second switch section 62 is brought into an on-off state, so the power switch is turned off, and this off state continues until the knob is locked (that is, until the next band is selected). , the power switch is turned on at the moment the next band is selected.

Therefore, the time lag of the power switch can be accurately and easily taken when switching bands, and the above-mentioned noise problem can be solved.
Product value and performance can be improved.

However, this can be achieved with an extremely simple structure, and
Since the power switch and the band selection switch are configured to be linked with one knob, the configuration is compact.

Further, since the slider 50 of the slide switch 48 is provided with a specially shaped suppressed plate portion 59, it is only necessary to use one slider 50 for selecting the MW band and SW band, and therefore only one slide switch 48 is required. Therefore, the space can be reduced, the structure can be simplified, and costs can be reduced.

Although the present invention has been described above based on one embodiment, it will be understood that the present invention is not limited to this embodiment and can be further modified.

For example, the holding plate 39 of the terminal 28 may be omitted and this may be replaced with the terminal 28.
8 itself, and a non-conductive spring 44 can also be used.

The arrangement and connection state of each terminal 25, 26, 27° 28 can also be changed in various ways.

Note that the present invention can of course be applied to switches other than the band changeover switch and the power switch.

Since the present invention has the above-mentioned configuration, the forward movement of a common switch operating member can be operated by simply having a plurality of switch operating members rotate a predetermined angle to operate the switch according to the forward movement of the switch operating members. It can be made different depending on the type of switch operating member used.

Therefore, since only one switch is required, compared to conventional mechanisms, the switch space can be reduced, the number of parts can be reduced, the structure and assembly can be simplified, and costs can be further reduced. It is easy to operate.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a radio receiver, in which Fig. 1 is a perspective view of the front side of the radio receiver, and Fig. 2 is a front cabinet of the radio receiver shown in Fig. 1. Figure 3 is a bottom view of the main parts in Figure 1 with the main parts removed, Figure 4 is a back view of the main parts in Figure 1 as seen from the inside, and Figure 5 is Figure 2. 6 is a sectional view taken along the line V-VJ of FIG. 2, FIG. 7 is a perspective view of the slider seen from above, and FIG. 8 is a section of the power switch operation knob in FIG. 5. Figure 9 is an enlarged cross-sectional view similar to Figure 5, Figure 9 is a cross-sectional view similar to Figure 8 when the knob is locked, Figure 10 is a diagram showing the relationship between the FM band knob and the slider. 11 is a sectional view similar to FIG. 10 showing the relationship between the MW band knob and the slider, and FIG. 12 is a sectional view showing the relationship between the SW band knob and the slider. 10 is a cross-sectional view similar to FIG. 10. In addition, in the symbols used in the drawings, 5°6.7 indicates the frequency selection knob (first and second switch operating members);
12 is a push button, 13 is a chassis, 19.20 is a press plate part,
25, 26, 27, 28 are contact terminals, 39 is an insulation holding plate, 45 is a part of a stopper, 48 is a slide switch,
50 is a slider (switch actuation member), 57.58 is a protrusion (first and second suppressing part), 59 is a pressed plate part, 5
9a. 59b is a pressed plate part (first and second pressed part), 61
62 is a first switch section, and 62 is a second switch section.

Claims (1)

[Scope of utility model registration request] The first and second switch operating members 6, 5 having a common pivot point, a common switch operating member 50 capable of operating the switch according to the amount of forward movement thereof, and a common switch operating member 50 provided in the first switch operating member 6. a second pressing portion 58 provided on the second switch operating member 5 so as to be located further from the rotational fulcrum than the first pressing portion 57; A first suppressed portion 59a provided on the switch operating member 50 so as to be contacted and pressed by the first suppressing portion 5T as the first switch operating member 6 rotates forward; A second switch is provided on the switch operating member 50 so as to be contacted and pressed by the second suppressing portion 58 as the second switch operating member 5 rotates forward.
When the first switch operating member 6 is rotated forward by a predetermined angle, the first suppressing portion 57 presses the first suppressing portion 59a and the first suppressing portion 59a is pressed. When the switch operating member 50 is moved forward by the first forward movement amount and the second switch operating member 5 is rotated forward by the predetermined angle, the second suppressing portion 58 is moved forward by the second pressed portion. 59b to move the switch actuating member 50 to the first position.
A switch operating device configured to move forward by a second forward movement amount that is greater than the forward movement amount of the second forward movement amount.