JPS5818171Y2 - switch operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch operation mechanism, and in particular provides a mechanism suitable for a power switch related to a band changeover switch of a radio receiver.

In conventional radio receivers, a power switch and a band changeover switch are provided separately, so each operation must be performed separately, resulting in a complicated structure.

The present invention provides a switch operation mechanism that can be used to correct the above-mentioned defects. According to this switch operation mechanism, the time lag of the switch can be accurately and easily taken, and the operation of the switch can be easily and accurately. Both the structure and the structure are simple, and when applied to a power switch related to a band changeover switch of a radio receiver, noise at the time of band changeover can be eliminated.

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 the cabinet 11 of the 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, and a sound quality control knob 3. Selection knob 4, frequency selection knob 5, 6. γ, 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.

An important feature of this embodiment is that the knobs 5, 6, and 7 for operating the band switching slide switch are also configured to function as a power switch.

This will be described in detail below, but 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, which is a support shaft 15 inserted into a bearing part 14 provided integrally with the shaft.

A coil spring 16 (
(Fig. 3) is arranged, and as described later, the knob is 6° γ.
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, and the rotational force of the knob 5 and the rotational force of the knobs 6 and 7 caused by the spring 16 are different! I'm trying to make it equal.

That is, the spring 16 corrects the torque of the knobs 6 and 7 to be equal to that of the knob 5.

After this return movement, the projections 17 provided on the knobs 5, 6.7
is located on the protrusion 18 on the chassis 13 side, so the knob 5,
6.7 is position restricted.

Further, below the operation part where the knobs 5, 6, and 7 are actually operated, there is a press plate part 19 for pressing the first switch part which is rectangular (described later), and a press plate part 19 (described later) which extends downward at a right angle to the Y rectangle. 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 projects 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 in the middle of the housing, so that the tip of the bent portion of the terminal 25 is not always open. Plate portion 19 of knobs 5, 6, and 7
The bent portion of the terminal 26 is located close to the lower surface of the terminal 26.
It extends directly below the bent portion 5 and has a small protrusion 30 at its tip.

An insulating plate 31 is arranged between the housing 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 27 is connected to each contact terminal 26 as shown in FIG.
It extends in the lateral direction between them, and both ends thereof are bent at right angles.

This bent portion 33 has a "shaped" shape (FIG. 5), and holes 34 and 35 are provided at both ends thereof, respectively.

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.
6.42 is provided, of which the protruding piece 36 is bent into a "shape" along the terminal 2T and has a small protrusion 3γ at its tip.

The enclosed 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 has a pair of protruding portions 40 extending perpendicularly to the terminal 2γ side at both ends thereof, and a protrusion 41 provided on each of these protruding portions. It is rotatably inserted into the above-mentioned hole 35 on the terminal 2γ side.

Therefore, when the holding plate 39 is held on the bent portion 33 of the terminal 27, the arrow 43 (see FIG. 5)
It can be rotated in any direction.

A coil spring 44 is installed between the protrusion 38 of the holding plate 39 of the terminal 28 and the hole 34 of the bent portion 33 of the terminal 27, so that the terminal 28 is always urged counterclockwise together with the holding plate 39. and the small protrusion 3 of the protruding piece 36 of the terminal 28
7 is configured to contact the terminal 2γ.

The edge of the folded holding plate 39 has a curved inner surface and is configured as a claw-shaped stopper part 45.

A portion of this stopper is disposed close to the lower end of each of the pressing plate portions 20 of the aforementioned knobs 5, 6, and 7.

The wires 46 and 47 are connected to the deaf terminals 26 and 28.
are soldered to each other.

The slide switch 48 for band switching may be of a conventionally known type, and its operating portion 51 is coupled to a slider 50 held at four locations by guide and locking protrusions 49 provided on the inner surface of the chassis 13. has been done.

That is, the slider 50 is inserted between the chassis 13 and the protrusion 49, and can slide in the direction of the arrow 52 while being held by the protrusion 49, and is fixed at an intermediate position with a screw 53. 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 the plate 54 .

In the past, as shown in FIG. 5, a coil spring 56 was 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 FIG. 6 and FIG. 1, the tip thereof is a one-shaped pressed plate portion 59.

That is, the suppressed plate portion 59 includes a short plate portion 59a that corresponds to the protrusion 5γ 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 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 constructed 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 1, so to select the FFM band, By pressing the knob 7 with a finger in the state shown in FIGS. 1 and 2.

Just turn on the power switch.

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

In the non-operating state shown in FIG. 8, the first switch section 6
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 (that is, the terminals 2γ, 28
is in contact).

and. When the knob 6 is pressed in the direction of the arrow 60 with a fingertip, the knob 6 moves against the shaft 15 while resisting the spring 16 (FIG. 3).
The lower end of the plate portion 20 remains on the top surface of the end portion of the insulating holding plate 39 of the second switch portion 62.

Next, when the rotational force of the knob 6 is further applied to the holding plate 39, the plate part 20 rotates counterclockwise while being in secure contact with the holding plate 39, and at the same time, the holding plate 39, together with the terminal 28, rotates as described above. It rotates slightly clockwise about the protrusion 41.

In this case, the lower end of the plate part 20 is somewhat rounded, and the upper end of the housing holding plate 39 is concave, so that 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 in the position indicated by the dashed line in FIG. 8, the small protrusion 37 of the terminal 28 separates from the terminal 27, 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 in the groove to the position shown by the two-dot chain line, the retaining plate 39 further rotates clockwise while maintaining the engaged state with the plate part 20, and the second switch part 62 However, the end of the terminal 25 of the first switch part 61 is elastically deformed downward as shown by the chain double-dashed line under the pressure of the plate part 19 of the knob 6. Finally, the small protrusion 30 of the terminal 26 is contacted and the terminal 26 itself is elastically deformed, so that 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 added between the retaining plate 39 and the bent portion 33 of the terminal 27, and as shown in FIG. The tip of the plate 39 enters the step 63 provided at the lower end of the plate 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 64 (see Figure 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 2
7, the second switch section 62 is returned to the on state by contacting the terminal 28 again, but on the other hand, the first switch section 61C
In this case, terminals 25 and 26 are still in contact and maintain 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 clockwise rotation of the knob 6 is prevented, 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 the screw 29 → terminal 27 → terminal 28, and the power switch is turned on for the first time.

As is clear from the above description, when the knob 6 moves forward, the second switch part 62 is turned off without being turned, and then the first switch part 61 is turned on, and then this t's second switch is turned off. The section 62 is turned on and the power switch is turned on.

If we look at this process in the past, it looks like this:

Initial state Halfway open state ----→←−−−→←−−→ First switch part 61 OFF OFF ON ON 1st addition switch 62 ON OFF OFF ON Next, the knob 6 is in the locked state, that is, the power is turned on. To release the on state of the switch, push the previously described lock release push button 12 in the direction of the arrow 60 as shown in FIG.
5 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 portion 63 of the plate portion 20 of the knob 6 is released, and the operation is the opposite to that described above. The lower end of the plate part 20 climbs over the tip of the retaining plate 39, and the spring 1
6 and the terminals 25 and 26, the knob 6 is restored to its original state all at once, 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
, terminal 28 is rotated counterclockwise to connect terminals 27 and 2.
He will come into contact with 8 again.

Therefore, the state of each switch part in the unlocking operation follows exactly the opposite course to that described above.

It will be understood that this lock can also be released by operating the other knob 5 or 7.

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 unlocking of the knob 5 → the locking of the knob 5 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.
- Explanation will be centered on FIG. 12.

As already mentioned, the present embodiment is characterized in that the pressed plate portion 59 of the slider 50 of the slide switch 48 has 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.

Therefore, 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 still, thereby selecting the MW band.

After unlocking Otazumi 6. As shown in Figure 12, S
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, the rotating force of the knob 5 is converted into a linear motion of the slider 50, and the slider 50 is moved by a predetermined distance in the direction of the arrow 66,
This results in the selection of the SW band.

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

That is, since the moving distance of the protrusion 5γ is shorter than that of the protrusion 58, the moving 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, as shown in FIG. 2, a switch 67 only for SW is provided on the side of the chassis 13, but this is turned on by being pushed by the slider 50 that moves when the knob 5 is locked. In this ON state, the knob 8 described above can be operated to further select a band within the short wave band.

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 56. This will return to the initial state shown in .

In this case, the restoring force of the spring 56 acts to further increase the returning force of the knob 5 or 6 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 7 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, the 1M band can be selected simply by turning on the power switch.

On the other hand, in order to select the MW mode or all SW modes, it is necessary to move the slider 50 a predetermined distance in the direction of the arrow 66, but this is done as explained in FIGS. 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 changing from the MW mode to the SW all modes, the power switch is turned off before switching. If it turns on (depending on the timing when the power switch is turned on)
, if the slide switch 48 for band switching is 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 is generated when the switch is changed, and the product value is reduced accordingly.

However, in this embodiment, when switching from one band to another, the housing knob plate 20
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 main lag of the power switch can be accurately and easily removed 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 band selection switch are linked with one knob, the configuration is compact.

Since the slider 50 of the slide switch 48 is provided with a specially shaped pressed 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 state of engagement between the knobs 5, 6.7 and the slider 50 of the slide switch 48 may be changed.

Therefore, the arrangement of the slider 50, especially its pressed plate portion 59,
The shape of can be changed.

It goes without saying that the protrusion 58 on the plate part 20 of the knob 6 and the protrusion 57 on the plate part 20 of the knob 5 can be omitted.

The number of knobs in the housing (ie, the number of bands) may be changed.

It is also possible to omit the holding plate 39 of the terminal 28, to use the terminal 28 itself, and to use a non-conductive spring 44.

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.

As described above, in the present invention, the forward movement of the switch operating member 5, 6 or 7 to the intermediate forward movement position causes the second switch portion 62 to be moved forward.
The second movable contact forming member 28° 39 is moved forward to turn the second switch portion 62 from the on state to the off state, and the associated switch operating member 5.6 or 7 is moved forward to the final forward position. The first movable contact forming member 25 of the first switch section 61 is moved forward by the movement to turn the first switch section 61 from the OFF state to the ON state, and the second pressing of the switch operating member 5°6 or 7 is performed. The second movable contact forming member 28, 39 is released from the pressure exerted by the section 20, and the second movable contact forming member 28, 39 is moved back to turn the second switch section 62 on again.

Therefore, both the first and second switch portions 61, 62 are turned on only when the switch operating member 5, 6 or 7 moves a predetermined distance to the final forward position. 7, it is possible to easily take the time lag of the switch when performing a desired operation (for example, band selection) at the same time.

In this case, one switch operation (for example, turning the power on/off) can be performed in conjunction with another switch operation (for example, band selection), and there is no need to perform these separately, so the operation and structure Both can be made simple.

The second switch part 62 that determines the time lag of the TA switch is pivoted so as to be rotatable in a reciprocating manner, and is arranged to face the second suppressing part 20 of the plurality of switch operating members 5, 6, or 7. has a movable contact forming member 28.39,
This second movable contact forming member 28, 39 is in the backward movement position when the switch operating member 5, 6 or 7 moves backward, and is pressed by the second pressing part 20 by the forward movement to the intermediate forward movement position. The second switch section 62 is turned on again by the forward rotation, and then by the forward movement to the final forward movement position, the above-mentioned suppression is released and the second switch section 62 is turned on again. I made it.

Therefore, the above time lag can be taken extremely accurately,
Moreover, the structure of the second switch section 62 necessary for this purpose is also extremely simple.

! In addition, since the switch is turned on only when the switch operating member 5, 6, or 7 moves a predetermined distance to the final forward position, this can be applied to the power switch of the radio receiver to perform other operations, such as band selection. When this is linked, there is no possibility that the previous band will be inserted when switching bands, and therefore noise can be eliminated.

[Brief explanation of drawings]

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 VI-VI 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 operating 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. Cross-sectional view similar to Figure 5, Figure 11 is MW
FIG. 12 is a sectional view similar to FIG. 10 showing the relationship between the band knob and the slider, and FIG. 12 is a sectional view similar to FIG. 10 showing the relationship between the SW band knob and the slider. In addition, in the symbols used in the drawings, 5°6.7 is a frequency selection knob (switch operation member), 12 is a push button, and 1 is a push button.
3 is a chassis, 19.20 is a pressing plate part (first and second suppressing part), 25, 26, 27° 28 is a contact terminal (25 is a first movable contact forming member, 28.39 is a second movable contact forming member) 39 is an insulating holding plate, 45 is a part of a stopper,
48 is a slide switch, 50 is a slider 59,5
9a. 59b is a pressed plate portion, 61 is a first switch portion, and 62 is a second switch portion.

Claims (1)

[Scope of utility model registration request] A first switch section 61, a second switch section 62 electrically connected in series to the first switch section 61, and a switch section 61 for operating the first and second switch sections 61 and 62. a reciprocating switch operating member 5, 6 or 7, respectively, and the switch operating member 5, 6 or 7 is a first switch operating member 5, 6 or 7.
and a second suppressing part 19,20, respectively, and the first switch part 61 is arranged to face the first suppressing part 19 of the switch operating member 5, 6 or 7. The movable contact forming member 25 is arranged such that the second switch part 62 is pivotally supported for reciprocating rotation and faces the second suppressing part 20 of the switch operating member 5, 6 or 7. When the switch operating member 5, 6 or 7 is in the double-movement position, the first movable contact-forming member 25 is in the double-movement position and the second movable contact-forming member 28,39 is The first switch section 61 is in the off state, the second movable contact forming members 28 and 39 are also in the return position, and the second switch section 62 is in the on state;
When the switch operation member 5, 6 or 7 in the housing moves forward to the intermediate forward movement position, the first switch part 61 is still in the OFF state, but the second movable contact forming member 28, 39 moves to the second When the second switch section 62 is turned off by being pressed by the suppressing section 20, and the switch operating member 5, 6 or 7 further moves forward to the final forward position, When the first movable contact forming member 25 is pressed by the first pressing portion 19, it moves forward and the first switch portion 61 is turned on, and the second movable contact forming member 28° 39 is released from the pressing by the second pressing section 20, the switch operating mechanism is configured so that the second switch section 62 is also turned on by rotating back.