JPS5839414B2 - double band push button tuner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to pushbutton tuners, and more particularly to double band pushbutton tuners, or so-called 5
- Relating to a 10 push button tuner.

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. Yes, it has 5 push buttons to select up to 5 different AM broadcasts and up to 5 different FM broadcasts.

This type of adjuster is known, for example, from Newman's U.S. Patent No. 3,
No. 357,264 (Re, No. 27,179) and Sta.
No. 3,415,129 to M.M.

Generally, this type of device has an actuation member equipped with each push button that slides in response to the push button being pressed. A driven member is provided that can engage and slide with the sliding movement of the actuating member.

A frequency regulating cam is attached to the driven member, and if there are five operating members that set the tuning mechanism to a frequency determined by the setting state of this cam when sliding together with the operating member, then a total of 10 driven members are provided. For example, five driven members to the right of the actuating member are associated with a tuning mechanism to effect tuning of one band (AM or FM broadcast), and five driven members to the left of the actuating member are associated with the tuning mechanism for tuning the other band. Means are provided for manually engaging the actuating member associated with the tuning mechanism to the driven member for tuning each band to effect tuning of the band (FM or AM broadcast).

The broadcast band manual selection means engages all actuating members with their respective right or left driven members according to the broadcast band to be selected. Top articulated toggle levers and slider pull gates for manually selectively engaging all toggle levers with right or left driven members for one broadcast band in the non-pushing, non-sliding position of the actuating member. It consists of

The slider-pull gate has a number of switch fingers corresponding to the toggle levers for pivoting each toggle lever.0 When the slider-pull gate is shifted to the right (looking at the front of the tuner), each The switch fingers cause the toggle lever to engage the right driven member, and shifting the slider pull gate to the left causes the respective switch fingers to engage the left driven member.

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 in to select a station. The driven member also slides together and the tuning mechanism sets a particular tuning state according to the set position of the cam of that driven member.

Stamm's patent was based on the fact that there was no means to force the toggle lever and the driven member to remain engaged while sliding one actuating member in the Newman patent's tuner. In view of the fact that the driven member may be misaligned even though it will not be disengaged during the movement, which may prevent accurate synchronization from being achieved, the toggle lever of Newm-an's patent has been developed. Alternatively, using connecting parts having locating parts, each connecting part is attached to a respective actuating member, and each locating part of the connecting parts is new.
are received in their respective slots in a shifter that corresponds to the slider pull gate of the '30 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 coupling part follows along a limited path defined by the slot. be done.

In one position of the shifting device in which the shifting device engages the coupling parts with the driven members on either side, a portion of each coupling part is inserted "tightly" into a notch in the respective driven member. Ru.

This "tight" insertion condition can be maintained during sliding of the actuating member as long as the coupling part moving with the actuating member moves its locating portion along the defined slot path. A problem with the Newman tuner is that during sliding of the actuating member, i.e. when a given pushbutton is depressed, the toggle lever of the actuating member may become disengaged from the driven member and the driven member may To solve the possibility that a positional deviation occurs and the tuning cam creates an erroneous synchronization 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 aiding in establishing a "tight" engagement is required.

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.

- Once a “tight” engagement of the tongue is achieved,
It can be maintained during the sliding movement of the actuating member of the locating part 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 the Stamm configuration, namely that while a given pushbutton is pressed,
The problem is due to the configuration in which the shift device is free to move in the direction of its shift movement while one actuating member is sliding with one selected driven member.

Such movement of the shifting device during sliding of the actuating member obviously destroys the "tight" engagement setting of the associated coupling parts.

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

It may also occur that, after sliding of the driven member, the coupling part is disengaged from the notch of the driven member due to movement of the shifting device, in which case the driven member returns to its original non-sliding position due to elastic action. Put it away.

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

The present invention retains the advantages of the Stamm patent over the above-mentioned Newman patent;
The purpose of this patent is to solve the shortcomings of Mr. M'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. and means for contacting the toggle lever and maintaining it in "hard" engagement with the one driven member when the toggle lever moves with the pivoting of the actuating member.

Accordingly, in the present invention, the toggle lever engages both driven members during sliding movement of the actuating member associated with it. The other locking is achieved by physical contact of the other portion of the toggle lever with the other stationary follower member.

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

The toggle lever maintains the one engagement "tight" by the other engagement during movement of the associated actuating member.

This hard engagement is not affected by shifting device fluctuations as in the Stamm patent, so 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 toggle lever in the position-locked state. Therefore, according to the tuner of the present invention, the shift device prevents its shift movement when all operating members are disabled. This is only possible in the active position, ie in the position in which all pushbuttons 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 firmly positioned with respect to the other driven member and the actuation lever.

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 T2 with the left driven member 74 when the shift means 242 is shifted 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, the position 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. There is.

Preferably, each of the five actuating members 72 has a support portion 246' (FIG. 1) for supporting the toggle lever 240 in a cylindrical manner.

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 242 can be manually moved from the state shown in FIG. 2 in the dotted line direction X2, so that the toggle lever 240 enters the notch in the right driven member.

The position of the toggle lever in this state is shown in phantom lines.

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

The shift device 242 has a roller 254 for engaging this cam surface. When the shift device shifts in the dotted line direction rotates clockwise about point 250, thereby entering the notch 246 in the molding 205 of the right follower.

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 slides therealong. move.

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.

Furthermore, according to the invention, the depth of the notches 256 is such that during the pivoting of the toggle lever 240, its portion 256 is always in a position within both notches 246, as can be seen. .

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

One notch insertion portion 256 of the toggle lever 240 is inserted into the notch 246 of one of the driven members 74.

Shift device 242 includes one toggle lever actuator 264 for each toggle lever 240 .

This toggle lever actuating device 264 is connected to the roller 25 in FIG.
Corresponds to 4.

The screw means 268 connects the back surface of the fixing plate 280 and the shift device 24.
It has a coil spring 270 which is placed under pressure between the two.

Toggle lever actuator 264 is movable upwardly relative to stationary plate 280 against the force of a spring.

The upward movement of the toggle lever actuator 264 ensures smooth pivoting of the toggle lever 240 as the toggle lever actuator 264 moves along with the movement of the shift means 242 over the cam surface 252 of the toggle lever 240.

The shift device 242 shown in FIG. 5 is mounted on a fixed plate 280 on the upper surface of the support so as to be movable laterally.

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

For this purpose, the fixing plate 280 is provided with a lock 284, into which slot the shift device 24 is inserted by means of a screw 268.
2 is installed.

The shift device 242 is provided with five toggle lever actuators 264 extending in the sliding direction of the actuating member 72.

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

The toggle lever actuating device 264 operates while the actuating member 72 is sliding due to the operation of the push button, that is, the toggle lever slide engaging portion 2 of the uncoupled driven member.
58, the toggle lever actuator 264 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 serve 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 one embodiment of the present invention, FIG. 2 is a partially sectional side view showing the relationship between the toggle lever and the shift device in the embodiment of the present invention, and FIG.
The figure is an enlarged view of a part of the driven member, FIG. 4 is a front view showing a shift device according to another embodiment of the present invention, and FIG.
It is an X-ray cross-sectional view. 246... Notch of driven member 74, 258...
...Toggle lever slide engagement part, 242...
...Shift device, 264...Toggle lever operating member.

Claims (1)

[Claims] 1. A plurality of actuating members 72 each having a push button and slidable in the longitudinal direction; driven members 74 provided on both sides of each actuating member; It is inserted into a notch 246 provided in the driven member so as to engage the driven member on the other side and cause the engaged driven member to follow and slide as the actuating member slides by operating the push button. It consists of toggle levers 240 having portions 256 and a shifting device 242 for pivoting the toggle levers into simultaneous engagement with the driven members on either side in the non-sliding position of the actuating member. The device is characterized in that it is provided so as to press against the toggle lever when the toggle lever is inserted into the notch of the driven member on the other side when moving to another broadcast band selection position. Double band push button tuner 0