JPS6029961A - Mode switching device of tape recorder - Google Patents

Abstract

PURPOSE:To make a pinch roller function as a spring which resets a transmission member that transmits the actuation of a pinch roller holding member and a motive power member to the pinch roller holding member to the original position, by making use of the force of a spring which presses the pinch roller to a capstan. CONSTITUTION:When a play mode is switched to a stop mode, the transmission of power carried out by a solenoid plunger, a motor, etc. is released to an action arm 46. Then each action is reversed orderly. In this case, an actuation member 37 is moved down by a head base spring 43 and springs 40 and 41 to function as a reset spring which turns the arm 46 in the opposite direction. A spring which energizes a pinch roller holding member toward a capstan is used to apply the downward force to an actuation member for the pinch roller holding member by the relation between the working point of said spring and the fulcrum of the pinch roller holding member. Thus the pinch roller moves the pinch roller holding member back to the direction where the holding member gets away from the capstan.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a mode switching device for a tape recorder that is operated by a solenoid plunger, a motor, etc. to bring a pinch roller located at a distance from the capstan into pressure contact with the capstan. It is.

Conventional tape recorder mode switching devices of this type include those shown in FIGS. 1 and 2.

To explain this with reference to the figure, l is a base, on which a pinch arm 4 with pinch rollers 2 and 3 pivotally supported, and a sub-pinch arm 5 are rotatably supported on shafts 6 and 7. There is.

Also, 8 is a pinch base, and the pin 9.1 established on the base l
0 into the grooves 8a and gb, and insert the pin 14a of the actuating arm 14, which is rotatably supported on the base 1 by a shaft 11 and has a spring 13 installed at one end, into the notch 8c of the pinch base 8. The actuating arm 14 is actuated by a solenoid plunger (not shown) and rotates to move the pinch bar 'A8 up and down.

Pressure arm 1 is attached to pinch base 8 with shafts 15 and 16.
7. The sub-pre-7 shear arms 18 are pivoted and layered, and the tips of the pressure arm 17 and the sub-pressure arm 1B clamp the tips of the pinch arm 4 and the sub-pinch arm 5,
Moreover, pinch springs 19 are provided between the pinch base 8, the pressure arm 17, and the sub-pressure arm 1B, respectively.
, the sub-pinch spring 20 is installed, and when the pinch base 8 moves upward as described above, the pinch rollers 2 and 3 contact the capstans 21 and 22, respectively, but the pinch arm 4
, the tip of the sub-pinch arm 5 is the pressure arm 17,
The pinch roller 2 is moved in the direction of passing through the width of the part held by the sub-pressure arm 18, and the pinch roller 2,
3 will be pressed together.

23 is Herado bass, which includes recording and playback end 2.
A sub-head base 26 is fixed to the upper part, and a ball 27.2 is attached to the base 1.
It can be slid up and down with respect to the base 1 with 8 interposed therebetween,
The movement of the solenoid plunger is transmitted by a connecting arm or the like (not shown), and the head base 23 is moved up and down.

FIG. 1 shows the stop state, and when the actuation arm 14 is rotated in the direction of arrow A by the solenoid plunger in response to a play command, the pinch base 8 is actuated in the direction of arrow B as described above, and the pinch arm 4 and the sub The pinch rollers 2 and 3 of the pinch arm 5 are pressed against the capstain y21 and 22, taking the second position and entering the play state.

Further, the head base 23 rises in the direction of arrow B by the operation of a solenoid plunger, etc., and the recording/playback head 2
4. The erasing head 25 takes a second position in contact with the tape;
It will be in play state.

When returning from the play state to the stop state, the pinch base 8 is mounted on the operating arm 14 and is returned to the state shown in FIG. 1 by a spring 13, and the head base 23 is returned to the state shown in FIG. 1 by a head base return spring (not shown).

In this way, in order to transition from the stop state to the play state, the mode switching device of the conventional tape player has a mechanism that moves the head and resists the spring of the operating arm in addition to the spring that presses the pinch roller against the capstan. Because it has to operate, the solenoid plunger or motor that is the driving force requires a larger operating force than necessary, which consumes extra energy, and the driving part is large, requiring space and increasing costs. There were drawbacks such as climbing.

The present invention utilizes the spring force that presses the pinch roller against the capstan to transmit the operation of the pinch roller holding member that pivotally supports the pinch roller, a solenoid plunger, or a motive force member such as a motor to the pinch roller holding member. The purpose of this invention is to eliminate the drawbacks of the conventional method by functioning as a return spring that returns the actuating member or the like to its old position.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 9.

Reference numeral 30 denotes a base, in which a pinch roller 31, which is a pinch roller holding member that pivotally supports the pinch rollers 2 and 3, and a sub-pinch arm 32 are rotatably supported on shafts 33 and 34 provided on the base 30. has been done.

A pressure arm 35 and a sub-pressure arm 36 are also rotatably supported on the shafts 33 and 34, and the pinch arm 31 and sub-pinch arm 32 are sandwiched between projections 35a, 36a and 35b, 36b provided on these. Mi, pinch arm 3
1 and the pressure arm 35, and the sub-pinch arm 32 and the sub-pressure arm 36 are arranged to interlock with each other.

37 is an operating member, and a guide pin 38.3 is installed on this member.
9 are inserted into the guide holes 30a, 30b of the base 30, so that the actuating member 37 can slide up and down with respect to the base 30.

Projections 37a and 37b of the operating member 37, pin 35c of the pressure arm 35, pin 3 of the subpressure arm 36
A spring 40.41 is stretched between the pin 35d of the pressure arm 35 and the locking portion 37c of the actuating member 37.
, the pin 36d of the sub-pressure arm 36 is connected to the locking portion 3.
7d.

42 is a head holding stand to which the recording/playback head 24 and the erasing head 25 are attached;
The pin 38 of the actuating member 37 passes through the guide hole 42b of No. 2.
A head base spring 43 is stretched between the head base spring 43 and the head base spring 43 to bias the head holding base 42 upward.

The head holding table 42 has its pin 42c inserted into the guide hole 30b of the base 30, and the ball 44 on the base 30.
a 944 b s 44 c, and the pins 42e and 42f of the operating member 37 are attached to the locking portion 37a,
It is in contact with 37f.

An actuating arm 46 is rotatably supported on a shaft 45 of the base 30, and a guide pin 38 of an actuating member 37 is fitted into the elongated hole 46a of the actuating arm 46, and is actuated by rotation of the actuating arm 46. The member 37 moves up and down.

Further, a positioning pin 47 is provided on the base 30, with which the shoulder portion 42g of the head holder 42 comes into contact to determine its stopping position.

21.22 is a capstan.

Although FIG. 3 shows the stopped state, when the solenoid plunger or motor etc. is operated by the operation command and the operating arm 46 starts moving in the direction of arrow C in FIG. is pulled and the actuating member 3
7 starts to rise, and the head holding stand 42 also rises due to being pulled by the head base spring 43, but the shoulder portion 42g of the head holding stand 42 does not reach the positioning pin 47, and the pin 42e
.

42f is locked to the locking portions 37e and 37f of the operating member 37, and the recording/reproducing head 24 and the erasing head 25 are in the first position close to the tape.

At this time, the pinch arm 3L sub-pinch arm 32 is in a state in which the pin 35d of the pressure arm 35 is locked to the locking part 37c of the operating member 37, and the pin 36d of the sub-pressure arm 36 is locked to the locking part 37d. The pinch rollers 2 and 3 are located at a first portion separated from each tongue 21 and 22 of the cab.
It's the location.

This state is the music sensor mode, which is shown in FIG.

When the rotation of the actuation arm 46 in the direction of arrow A continues,
Similarly to the above, the actuating member 37 rises further, and the head holder 42 is pulled by the head base spring 43 to its shoulder 42g.
comes into contact with the positioning pin 47, and the head holding base 42 is prevented from rising any further, and the head base spring 43 is expanded to prevent the operating member 37 from rising further than the state shown in FIG. As a result, the head holding table 42 does not rise any further and is held at the second position where the head is pressed against the tape.

Since the rotation of the actuation arm 46 in the direction of arrow A continues, the actuation member 37 also continues to rise accordingly.
The pinch roller 2 of the pinch arm 31 is the capstan 21
When the capstan 21 comes into contact with the tape, the rotation of the capstan 21 starts driving the tape, resulting in the state shown in FIG.

However, since the actuation member 37 continues to rise, the pin 35d of the pressure arm 35
C, the spring jO is expanded, and the force causes the pinch arm 31 to press the pinch roller 2 against the capstan 21.

Next, as the operating member 37 continues to rise, the pinch roller 33 of the sub-pinch arm 32 comes into contact with the capstan 22, and the tape is fed out by the rotation of the capstan 22, resulting in the state shown in FIG.

After that, the actuating member 37 rises slightly, and the pin 36d of the sub-pressure arm 36 is moved to the locking portion 37 of the indicating member 37.
d, the spring 41 is extended, and the pinch arm 32 presses the pinch roller 3 against the capstan 22 due to its force, and assumes a second position where the pinch roller 2.3 is pressed against the capstan 21.22. The state shown in FIG. 8 is reached, and the play mode is entered.

That is, first, the recording/playback head 24 and erasing head 25 contact the tape to start recording or playback, and then the pinch roller 2 on the take-up side contacts the capstan 21 and pulls the tape toward the take-up side to take up slack in the tape. Then, the pinch roller 3 on the feeding side contacts the capstan 22 and feeds out the tape, thereby ensuring recording and playback and removing slack from the tape.

Furthermore, in order to shift from the play mode shown in FIG. 8 to the stop mode shown in FIG. The head base spring 43, spring 40,
41 acts as a return spring to lower the actuating member 37 and rotate the actuating arm 46 in the opposite direction.

That is, the extended head base spring 43 attempts to contract, and the force that pulls the pin 38 of the actuating member 37 lowers the actuating member 37, causing the actuating arm 46 to rotate in the opposite direction.

In the above embodiments, the pinch arm and the pressure arm are separate members, but there is no problem if they are integrated.

It is also a dual capstan type with a pair of capstans and pinch rollers on the left and right sides of the head. However, it can also be used with a single-cab Zukun system that has a pair of capstans and pinch rollers only on the right side without any problems.

Like a musketeer, the present invention utilizes a spring that urges a pinch roller holding member that pivotally supports the pinch roller toward the capstan, and by the relationship between the acting point of this spring and the fulcrum of the pinch roller holding member, A downward force is applied to the actuating member that operates the pinch roller holding member, thereby returning the pinch roller holding member in the direction in which the pinch roller moves away from the capstan. Therefore, there is no need for a solenoid plunger or motor, etc., which is the driving force for the extra force that resists this spring, and the energy consumption can be reduced, and it is also compact and space-saving. It can be reduced and costs can also be reduced.

Moreover, since its configuration is simple, there is no risk of failure.
There are also effects such as reliable operation.

[Brief explanation of the drawing]

1 and 2 are front and bottom views of a conventional mode switching device for a tape recorder, FIGS. 3 to 9 show embodiments of the present invention, and FIGS. 3 to 8 show the operating order thereof. front view, No. 9
The figure is a bottom view. 2.3... Pinch roller, 21, 22... Capstan, 30... Base, 31... Pinch arm, 32
...Sub pinch arm, 37...Operating member, 37c
, 37d...Locking part, 40.41... Spring. Figure 1 Figure 2 I Figure 5 Figure 6 Figure 8

Claims (1)

[Claims] A pinch roller holding member that pivotally supports the pinch roller and is rotatably supported on a base, and a lock that moves on the base and contacts a part of the pinch roller retaining member on the pinch roller side. an actuating member provided with a capstan, and an actuating member with one end spanned over the actuating member, the pinch roller holding member being biased toward the pinch roller side of the pinch roller holding member in a direction to bring the pinch roller into contact with the capstan, and engaging the pinch roller holding member. A mode switching device for a tape recorder, comprising a spring that is brought into pressure contact with a stop portion.