JPS609950Y2 - Tape recorder head panel operation mechanism - Google Patents

Description

[Detailed description of the invention] The present invention relates to a head panel operating mechanism for a tape recorder, more specifically, a head panel operating mechanism for performing Cue-L/Review operations in a tape recorder with an automatic music selection device. Two solenoids arranged on the back surface, an operating lever whose one end is connected to the plunger of each solenoid and whose middle part is pivoted to the chassis, and a locking part provided at the other end of each operating lever engages. A regeneration drive gear having a partially toothless portion that rotates in a predetermined direction by the rotational force of the drive gear when meshing with a drive gear disposed at an appropriate location, and a regeneration drive gear having a possible inner protrusion and an outer protrusion at a predetermined position on a rim part; A drive gear for cue review, a deformable regeneration cam protruding from the center of the rim of the drive gear for regeneration, and a deformable regeneration cam protruding from the center of the rim of the drive gear for cue review, with a diameter greater than the diameter of the deformation cam for regeneration. A deformable cam for cue/review having a small diameter contacts each of the deformed cams, and when the locking portion of the operation lever and the protrusion of the drive gear are unlatched, each drive gear a spring device that rotates the
a panel operation plate that has a retaining portion that engages with each of the deformation cams and is pushed by the deformation cam and moves in a predetermined direction when each deformation cam rotates; and a panel operation plate that is connected to the operation plate and follows the movement of the operation plate. This invention relates to a head panel operating mechanism for a tape recorder, characterized by comprising a movable head panel made of bark.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, a regeneration solenoid 2 is disposed at an appropriate position on the back surface of the chassis 1, and an operating lever whose central portion is pivotally connected to the chassis 1 at the tip of the plunger 2' of the regeneration solenoid 2. 3 are connected with a pin, and a regeneration drive gear 4 is arranged on the back side of the other end of the operating lever 3, and an outer pin 4a and an inner pin 4b are protruded from the rim of the drive gear 4 at required positions. When the plunger 2' of the regeneration solenoid 2 is extended, the locking portion 3' provided at the other end of the operating lever 3 is positioned within the orbit of the inner pin 4b, and the plunger 2' of the regeneration solenoid 2 is extended. When the jar 2' is contracted (see FIG. 5), the locking portion 3' is positioned within the orbit of the outer pin 4a.

Also, similar to the regeneration solenoid 2, a cue/review solenoid 5 (hereinafter abbreviated as C-R) is provided at an appropriate position, and the center portion is placed at the tip of the plunger 5' of the C-R solenoid 5. By connecting one end of the operating lever 6 that is pivotally connected to the chassis 1 with a pin, and placing a required distance between the other end of the operating lever 6 and the regeneration drive gear 4 on the back side of the operating lever 6, C.
-R drive gear 7 is arranged at the required position of the C-R drive gear rim portion, and the outer pin 7a and the inner pin 7b are provided.
is provided protrudingly from the plunger 5' of the C-R solenoid 5.
When the lever is extended, a locking portion 6' provided in addition to the operating lever 6
is positioned within the orbit of the inner pin 7b, and when the plunger 5' of the C-R solenoid 5 is contracted (see Fig. 4), the locking portion 6' is positioned within the orbit of the outer pin 7a. Configure to locate.

Furthermore, a required drive gear 8 that rotates in the A direction by a motor (not shown) is disposed between the reproduction drive gear 4 and the C-R drive gear 7, so that it can mesh with both drive gears 4 and 7. In addition, both drive gears 4, 7 are provided with toothless portions 4c, 7c, and each outer pin 4a, 7a or inner pin 4b, 7b is connected to a locking portion 3', 6 of each operating lever 3, 6.
It is configured so that it does not mesh with the drive gear 8 when it is locked with the drive gear 8.

A deformable cam 9 is provided on both sides of the rim portion of the reproduction drive gear 4 so that its radius gradually increases with respect to the rotational direction (B direction) of the gear 4, and similarly, the C-R drive gear 7
The deformable cam 9 has a radius that gradually increases with respect to the rotational direction (B direction) of the gear 7 on both sides of the rim portion of the deformable cam 9.
Deformed cam 1 formed to have the maximum diameter within the required maximum diameter.
Protrude o.

Note that 9' and 10' are the tip ends of the maximum diameter portions of each of the cams 9 and 10.

In addition, as shown in FIG.
b is locked, a helical spring 11 is fixed at one end side and the center portion in an appropriate position for each protruding end 9', 10' on one side (this side in Fig. 1) of the deformable cams 9, 10. .12 into contact with each drive gear 4,
7 is configured to apply a force to rotate in the B direction.

As shown in FIG. 2, between the drive gear 8 and the chassis 1 (that is, the other side of each deformable cam 9, 10 in the figure), a head panel 13 and a spring 13' are provided on the front side of the chassis 1. In addition to arranging the connected panel operation plates 14, required locking portions 14a and 1 provided on the operation plates 14 are provided.
4b to the deformable cams 9 and 10, and the deformable cams 9
Alternatively, when the operation plate 14 is moved in the C direction by rotation of 10, the head panel 13 also moves in the C direction following the operation plate 14.
It is configured so that it can move in the direction.

In the figure, 15 is a playback head, 16 is a pinch roller, 17 is a capstan, 18 is a spring, and 19 is a slide guide.

In addition, the excitation of each solenoid 2°5 for the regeneration and C-R
Demagnetization is configured to be controlled by a logic circuit (not shown).

Next, the operation will be explained.

In the tape recorder with an automatic device equipped with the head panel operation mechanism of the present invention having the above configuration, the operation panel 1
When an arbitrary song selection switch is operated when 4 is in the L position, the tape will run and a song selection operation will be performed.

Simultaneously with this operation, the C/R solenoid 5 is energized and the plunger 5' contracts.

The contraction of the plunger 5' causes the operating lever 6 to move, releasing the inner pin 7b of the C/R drive gear 7 that was locked at the locking part 6', and moving the locking part 6' to the outer pin 7a. Position it within the orbit.

Then, the C-R drive gear 7 rotates in the direction B due to the force of the spring 12 in contact with the deformable cam 10, and this rotation causes the C-R drive gear 7 and drive gear 8, which were in a non-meshing state, to rotate. The C-R drive gear 7 receives the rotational force of the drive gear 8 and further rotates in the B direction.

Further, as the drive gear 7 rotates, the deformable cam 10 also rotates, and at this time, the operating plate 14 is moved a certain amount in the C direction by the locking portion 14b that engages with the deformable cam 10. When the deformable cam 10 rotates and its tip 10' is engaged with the locking portion 14b, the drive gears 7 and 8 are disengaged, and at the same time the outer pin 7 is disengaged.
a is locked by the locking portion 6' of the operating lever 6, the movement of the operating plate 14 is stopped at the position L□ (the fourth
(see figure).

On the other hand, the head panel 13 connected to the operation plate 14 also follows the operation plate 14 and moves by a certain amount in the direction C, so that the head 15 maintains a required gap with the tape and the pinch roller 16 maintains a required gap with the capstan 17.

In other words, it becomes a cue or review state of a tape recorder.

When a song is selected in such a cue or review state,
Subsequently, the C-R solenoid 5 is demagnetized, the operating lever 6 is moved to its original position, and the locking portion 6' is positioned within the orbit of the inner pin 7b of the C-R drive gear 7.

Then, the force of the spring 12 in contact with the deformable cam 10 causes the drive gear 7 to rotate in the direction B, and the rotation of the drive gear 7, whose inner pin 7b is locked to the locking portion 6' of the operating lever 6, is stopped. .

At approximately the same time as this operation, the regeneration solenoid 2 is energized, the plunger 2' is contracted, the operating lever 3 is moved, and the locking part 3' is attached to the outer pin. Located within the orbit of 4a, the regeneration drive gear 4
The inner pin 4b is released, the regeneration drive gear 4 is rotated in the B direction by the spring 11, the regeneration drive gear 4 is engaged with the drive gear 8, and further rotated in the B direction, and the regeneration drive gear 4 is rotated. Along with this, the deformable cam 9 also rotates, and at this time, the locking portion 14a engaged with the deformable cam 9 moves the operating plate 14 by a certain amount in the C direction.The maximum diameter of the deformable cam 9 is the maximum diameter of the deformable cam 10. (The amount of movement of the operation plate 14 is larger than that when using the deformed cam 10), the regeneration drive gear 4 and the drive gear 8 are disengaged, and at the same time, the outer pin 4a engages the locking portion 3 of the operation lever 3. The movement of the operation plate 14 is stopped by being locked at the position L2), the head panel 13 also moves a certain amount in the direction C, and the head 15 is moved against the tape and the pinch roller 16 is moved against the capstan 17. It is in a connected state, that is, in a tape recorder playback state (
(See Figure 5).

In the above, the difference between the maximum diameters of the deformable cams 9 and 10 is the difference between the moving position L of the operation plate 14, and this difference ΔS is the difference between the head 15 and the tape necessary for cue or review in the tape recorder. , a required gap between the pinch roller 16 and the capstan 17, etc.

In addition, when the song selection switch for another song is operated in the playback state as described above, the playback solenoid 2 is demagnetized and the playback state is temporarily canceled, and then the above-mentioned operation is repeated almost simultaneously to play again. state.

In the above embodiment, a helical spring was used to rotate each deformable cam, but other spring devices may be used if the same effect can be achieved, and connections between the head panel and the operation plate may be used other than those shown in the drawings. It is also possible to provide a separate drive gear that can mesh with each drive gear, and the mechanism of the present invention can also be adopted in an auto-reverse type tape recorder, and other various methods may be used as long as they do not depart from the gist of the present invention. Of course, modifications can be made.

As mentioned above, according to the present invention, the panel operation board connected to the head panel is moved by cams of different diameters, so when performing automatic song selection, C can be changed without involving the playback operation.
- It is efficient because it can be put into the R use and regeneration state;
be effective.

[Brief explanation of the drawing]

Figure 1 is a principle diagram of the mechanism of the present invention viewed from the back side of the chassis, Figure 2 is a schematic view taken in the direction of arrow ■ in Figure 1, and Figure 3 is a schematic diagram of the mechanism of the present invention viewed from the front side of the chassis. (However, the chassis is omitted.) FIGS. 4 and 5 are views showing the operating state of the mechanism of the present invention, respectively. 1... Chassis, 2, 5... Solenoid, 3゜6... Operation lever 3', 6'...
...Locking part, 4,7...Drive gear, 4a
w7a...Outside pin, 4b, 7b...
Inner pin, 8... Drive gear, 9, 10...
・・Deformation cam, 11, 12... Wound spring, 1
3... Head panel, 14... Panel operation board, 14a, 14b... Engaging portion.

Claims (1)

[Scope of utility model registration request] Two solenoids arranged on the back of the chassis, an operating lever whose one end is connected to the plunger of each solenoid and whose middle part is pivoted to the chassis, and a locking part provided at the other end of each operating lever engages. A drive gear for playback having a two-part toothless portion that has a lockable inner protrusion and an outer protrusion at required positions on a rim portion and rotates in a predetermined direction by the rotational force of the drive gear when meshing with a drive gear disposed at an appropriate position. and a cue review drive gear, a regeneration deformable cam protruding from the center of the rim of the regeneration drive gear, and a diameter of the regeneration deformation cam protruding from the center of the rim of the cue review drive gear. A modified cam for cue review having a smaller diameter;
a spring device that contacts each of the deformation cams and rotates each drive gear in a predetermined direction via the deformation cam when the locking portion of the operating lever and the protrusion of the drive gear are released; A panel operation plate that has a retaining portion that engages with the cam and is pushed by the deformation cam and moves in a predetermined direction when each deformation cam rotates; and a panel operation plate that is connected to the operation plate and can move following the movement of the operation plate. A tape recorder head panel operating mechanism characterized by a bark-like head panel.