JPS5818012B2 - double band push button tuner - Google Patents

Description

[Detailed description of the invention] The present invention relates to pushbutton tuners.

More particularly, it relates to double-band pushbutton tuners, or so-called 5-10 pushbutton tuners.

A 5-10 tuner is a tuner in which five pushbuttons are used to tune AM broadcasts in one operating mode and to tune FM broadcasts in the other operating mode. and has five push buttons to select up to five different AM broadcasts and up to five different FM broadcasts.

This type of regulator is known, for example, from Newman's U.S. Pat.
No. 357264 (Re, No. 27179) and Stam
It is disclosed and claimed in No. 3415129 of Mr. M.

Generally, devices of this type include an actuating member mounted with each pushbutton that slides in response to depression of the pushbutton.

Both sides of each actuating member are provided with driven members, either of which can selectively engage with the actuating member and slide together with the sliding of the actuating member.

A frequency regulating cam is attached to the driven member, and when it slides together with the actuating member, it sets the tuning mechanism to a frequency determined by the setting state of this cam.

If 5 actuating members are provided, a total of 10 driven members are provided, e.g. the 5 driven members to the right of the actuating member are tuned to tune one band (AM or FM broadcast). In conjunction with the mechanism, five driven members to the left of the actuating member are associated with the tuning mechanism to effect tuning of other bands (FM or AM broadcast).

Means are provided for manually engaging the actuating member with the driven member of each band's tuning reservoir.

The broadcast band manual selection means causes all actuating members to engage their respective right or left driven members depending on the broadcast band to be selected.

In the Newman patent, this broadcast band manual selection means includes a toggle lever articulated on the top of each actuating member, and all toggle levers are pressed into the non-sliding position of the actuating member to select one of the broadcast band reservoirs. It consists of a slider pull gate that is selectively engaged manually with either the right or left driven member.

The slider pull gate has a corresponding number of switch fingers for pivoting each toggle lever.

When the slider-pull gate is shifted to the right (looking at the front of the tuner), each switch finger engages the toggle lever with the right driven member, causing the slider-pull gate to engage the right driven member.
Shifting the gate to the left causes each switch finger to engage the left follower.

This "engagement" is accomplished by inserting each end of the toggle lever into a receiving slot or notch in the right or left driven member, respectively.

With the actuating member thus engaged, the right or left driven member for either broadcast band is engaged when any one actuating member is slid to be pushed in for tuning. The driven member also slides together and the tuning mechanism sets a particular tuning state according to the set position of the cam of the driven member.

Stamm's patent is based on the fact that in the tuner of Newman's patent, one actuating member was sliding and there was no means to forcibly maintain engagement between the toggle lever and the driven member. In view of the fact that during sliding of the members, the driven member may be displaced, although not disengaged, and therefore accurate synchronization may not be achieved, the toggle lever of Newman's patent has been proposed. Instead, a connecting part with a positioning part is used.

Each connecting part is enclosed in a respective actuating member,
And each positioning part of those connecting parts is Ne7
are received in their respective slots in a shift device that corresponds to the slider pull gate of the Mann patent.

During sliding of the actuating member, the locating part is forced to move within the slot of the shifting device, so that the locating part or the connecting part follows along a limited path defined by the slot. Ru.

In one position of the shifting device such that the shifting device engages the connecting components with the driven members on either side, a portion of each connecting component is inserted "tightly" into the respective batch of driven members. be done.

This "tight" insertion condition can be maintained during sliding of the actuating member as long as the connecting part moving with the actuating member moves its locating portion along the defined slot path.

This arrangement eliminates the problem with the Newman tuner, in which the toggle lever of the actuating member may become disengaged from the driven member during slide of the actuating member, i.e., when a given pushbutton is depressed. To solve the possibility that a positional deviation occurs in a driven member and its tuning cam creates a mistuned state.

Mr. Stamm's patent, as described above, requires that when the shift device is manually moved to set the broadcast band, the connecting part is "tightly" engaged with the driven member S for the selected broadcast band. Since it is necessary to match the
Some means of establishing a "tight" engagement is necessary.

This means is accomplished in the Stamm patent by providing a projection on the bottom of each connecting piece, thereby providing a resilient detent action.

- A "tight" state of engagement of the tongue is achieved;
It can be maintained during the sliding movement of the actuating member of the locator tray of the connecting part as long as it passes through a restricted path in the slot of the shifting device.

However, there is an inherent problem with this configuration of the Stamm patent, namely, that while a given slave button is pressed, i.e., one actuating member is sliding with one selected driven member, the shift device This is a problem due to the configuration in which the shifter can move freely in the shift direction.

Movement of the shifting device as described above during sliding of the actuating member clearly destroys the "tight" retention setting of the associated connecting parts.

This means that a positional shift of the sliding driven member may occur, which may lead to incorrect tuning.

Also, during sliding of the driven member, movement of the shifting device may cause the joining part to disengage from the notch of the driven device, in which case the driven member is returned to its original non-sliding position by an elastic action. I'll go back for it.

It is therefore necessary to overcome at least the above-mentioned drawbacks of the Stamm tuner.

. The present invention is based on the above-mentioned Newman patent of Stamm.
The above-mentioned Sta
The purpose of this patent is to solve the drawbacks of Mr. mm's patent.

According to the invention, a toggle lever is pivotally mounted on each actuating member and is pivotable by a shifting device into engagement with a driven member on either side with respect to the actuating member; A toggle lever of the actuating member engages and slides together with the toggle lever of the actuating member when the actuating member slides. means for contacting the toggle lever and maintaining it "firmly" engaged with the one driven member when the toggle lever moves as the actuating member pivots.

Accordingly, in the present invention, the toggle lever engages both driven members during sliding movement of the actuating member associated therewith.

Engagement of one of the toggle levers is achieved by inserting a portion of the toggle lever into a notch in one driven member, and engagement of the other is achieved by inserting a portion of the toggle lever into a notch in the other driven member while the other portion of the toggle lever is stationary. by physical contact with the member.

The other engagement is achieved by sliding contact as the toggle lever moves with the actuating member.

The toggle lever maintains the one lock by the other lock during movement of the associated actuating member.

Since this hard lock condition is not affected by shifting device variations as in the Stamm patent, accurate tuning is always possible.

Furthermore, in the present invention, means are provided to prevent the shifting device from shifting in the direction of tuning of other bands during a given sliding movement of the actuating member.

This means can be formed in a very simple manner by a part of the shifting device and a part of the toggle lever, which is locked in position in both engagement states during movement.

Movement of the shift device is prohibited when the above-mentioned part comes into contact with the above-mentioned position-locked toggle lever.

Thus, with the tuner of the invention, the shifting device is capable of performing its shifting movement with all actuating members in the inactive position, ie, in a position where all push buttons are not pressed.

If the operating position of the operating member is defined as the position in which the operating member slides when the pushbutton is pressed and brings the engaged driven member to the synchronized position, then when the operating member is inactive and moves between the operating positions, the shift member Shifts in other band selection directions are inhibited and the associated toggle lever also maintains one driven member rigidly positioned with respect to the other driven member and the actuating member.

Therefore, with the present invention, in an extremely preferred embodiment,
This solves the drawbacks of the Stamm patent mentioned above.

The double-band push button tuner of the present invention can be manually tuned to FM.
and a broadcast band selection mechanism having a shift device for selecting one of the AM and AM broadcast bands.

The broadcast band selection mechanism includes a toggle lever that engages the actuating member with one of the driven members on either side of each actuating member in response to a lateral shift of the shift device.

FIG. 1 shows one actuating member 72 with a push button (not shown) at the left end and a follower member 74 and toggle lever 240 on either side thereof.

The upper follower member 74 is shown with the sector cams (not shown) of molded portions 105 and 106 in the uncrimped state, and the lower follower member 74 is shown in the crimped state.

FIG. 2 shows shift device 242. FIG.

The toggle lever 240 engages the actuating member 72 with the left driven member 74 by shifting the shifting means 242 in the direction of the solid line.

Molded portion 105 of follower member 74 has a notch 246 adapted to receive toggle lever 240.

In the inoperative position of the actuating member 72, ie, when the pushbutton is not pressed, the notches of the driven member pair are aligned such that the toggle lever 240 can pivot into either notch. ing.

゛Preferably, the five actuating members 74 each include a support portion 246 (for supporting the toggle lever 240 in a cylindrical manner).
(Fig. 1).

This support 246 has a recess 248 in which the toggle lever 240 is pivoted about an axis 250.

Shift device 242 can pivot all toggle levers 240 simultaneously.

The shift device 1242 can be manually moved from the state shown in FIG. 28 in the dotted line direction X2, so that the doggle lever 240 enters the notch in the right driven member.

The position of the toggle lever in this state is shown by a phantom line.

The top surface of toggle lever 240 forms a cam surface 252.

Shifting device 242 has rollers 254 for engaging this cam surface.

When the shift device shifts in the dotted line direction Get inside the notch.

According to the unique configuration of the embodiment of the present invention, when the actuating member slides, the toggle lever 240 engages the upper end of the uncoupled driven member (the right driven member in the figure) and moves along the upper end of the driven member. Sliding.

This engagement is achieved through the notch 246 of the (left) driven member in the connected state.
and the left side portion 256 of the toggle lever is maintained during the sliding stroke of the actuating member.

For this purpose, the positional relationship between the actuating member 72 and both driven members 74, the shape of the notch contacting portion 256 of the toggle lever 240, the depth of the notch 246, the toggle lever slide engaging portion of the driven member (258 in FIG. ) is selected.

Further, in accordance with the present invention, the depth of notch 256 is.

As can be seen, in the course of pivoting the toggle lever 240, its portion 256 always remains in the position within both notches 246.

4 and 5 show a modification of FIG. 2. FIG.

The notch insertion portion 256 of one of the toggle levers 240 is inserted into the notch 246 of one of the driven members 74. The three-shift device 242 includes one toggle lever actuation device for each toggle lever 240.

This toggle lever actuating device is placed in the toggle lever enabling position in front of each shift device movement inhibiting member 272 shown in FIG. 5, and supports the toggle lever actuating member 264 corresponding to FIG. The screw means 268 includes screw means 268 for screwing.

The screw means includes a coil spring 270 that is placed under pressure between the back surface of the shift device movement inhibiting member 272 and the toggle bar actuating member 264.

Member 264 is movable upwardly relative to shift device 242 against the force of the spring.

Member 264 is placed over cam surface 252 of toggle lever 240.
When the member 26 moves with the movement of the shift means 242, the member 26
The upward movement of 4 ensures smooth pivoting of the toggle lever 240.

The shifting device 242 shown in FIG. 5 is laterally movably mounted on a plate 280 on the top surface of the support.

In FIG. 5, the shift device 242 can be moved to the left via the manual operation section 262.

For this purpose, the plate 280 is provided with a slot 284 into which the shifting means 242 are mounted by screws 282.

The shift device 242 is provided with preferably five shift means movement inhibiting members 272 extending in the sliding direction of the actuating member.

Shifting means 242 can be made from a single piece of board.

This shift means movement inhibiting member 272 is inserted into the toggle lever slide engaging portion 272 of the driven member when the operating member is sliding due to the operation of the push button, that is, when the toggle lever is not connected.
58, this member 272 serves to prevent any attempt to move the shifter by engaging the associated fixed toggle lever.

Spring means (not shown) are preferably provided between the shifter 242 and the support, which spring means act to bias the shifter toward either broadcast band selection position.

[Brief explanation of drawings]

FIG. 1 is a top view showing the relationship between the driven member and the actuating member in an embodiment of the present invention, FIG. 2 is a diagram showing the relationship between the toggle lever and the shift device in the embodiment of the present invention, and FIG. 3 is a top view showing the relationship between the driven member and the operating member in an embodiment of the present invention. FIG. 4 is a diagram showing a shift device according to another embodiment of the present invention, and FIG. 5 is a diagram showing a shift device according to still another embodiment of the present invention. In the figure, 246 is a notch of the driven member 74, 258 is a toggle lever slide engagement portion, 242 is a shift device, 264
272 indicates a toggle lever operating member, and 272 indicates a shift device movement inhibiting member.

Claims (1)

[Claims] 1 A plurality of actuating members T2 each having a push button and slidable in the longitudinal direction, driven members 74 provided on both sides of each actuating member, and pivotably attached to each actuating member. When the actuating member is in a non-sliding position, the actuating member is engaged with the driven member on either side of the actuating member so as to cause the driven member to follow the sliding movement of the actuating member by operating the push button. Notches 246 in each of the driven members on the side of
Toggle lever 24 having a portion 256 inserted into the toggle lever 24
0 and a shift device 242 for pivoting the toggle levers to simultaneously engage any of the associated driven members in the non-sliding position of the actuating member; When inserted into the notch, the toggle lever slides over the stationary surface 258 of the unengaged driven member on the other side while the associated actuating member and driven member slide. A double band push button tuner characterized in that it is fixed and maintained in position.