JPS6314352A - Operation mode selecting and switching device for tape recorder - Google Patents

Abstract

PURPOSE:To contrive to attain the miniaturization and light weight of a tape recorder by providing a guide part lower than the cam at the tip part in a direction along which the cam is driven, providing a guide pin having a smaller diameter than that of an engagement part on the engagement part of a driven member and engaging the guide pin with the guide part so as to guide the follower drive of a driven member by the cam. CONSTITUTION:A cam 8, 9 or 10 driving a driven member 5 or 6 in response to the selected operating mode is provided and a drive transfer means 12 or 18 at each operating mode is intermitted by the drive of the driven member 5 or 6. For example, the guide part 66 lower than the cam 10 is provided to the tip in the direction in which the cam 10 is driven and the guide pin 67 having a smaller diameter than that of the engagement part 53 is provided on the engagement part 53 of the driven member 5. The guide pin 67 is engaged with the guide part 66 to guide the drive of the driven member 5 by the cam 10. Thus, number of solenoids equal to the number of operation modes is not required to attain miniaturization, light weight and low cost of a tape recorder are attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for selecting and switching an operating mode such as fast forwarding based on a stop sign 7g or an operating state of a tape recorder.

[Conventional technology]

The tape recorder is capable of switching between operating modes such as forward forwarding (FF), rewinding, reverse fast forwarding (RWD), and playback and recording modes. For example, when the FF mode is selected, as shown in FIG.
2 rotates in the direction of arrow X1 from the position shown by the chain line to gear 13.
The rotation is then transmitted from the gear 13 via the gear 20, the reel 21 rotates, and the tape 23 is transferred to the reel 26.
From there, it is wound onto reel 25. At this time, the pinch rollers 31 and 32 and the magnetic head 33 are separated from the tape 23 so as not to interfere with high-speed running. When the RWD mode is selected, as shown in FIG.
rotates in the direction of arrow X2 from the position shown by the chain line, and the gear 12 meshes with the hydraulic gear 15. Then, the rotation is transmitted from gear 15 to gear 16 and gear 27, and reel +l+2
8 rotates, and the tape 23 is wound onto the reel 25 and the reel 26.

When the playback (or recording) operation mode is selected, the J member 5 that follows the link moves backward, and the gear 14 (which has fewer teeth than the gear 12) is exposed, as shown in FIG. The driven member 17 advances and the gear 14 meshes with the gear 13. At the same time, the pinch roller 31 and the magnetic head 33 move forward and come into contact with the tape 23. As a result, tape 23
runs at a constant speed and plays (or records) the reel 26.
If side A is to be regenerated in the above case, in which side A is being wound on reel 25 from At the same time, the pinch roller 31 retreats and the pinch roller 32 advances to come into contact with the tape 23.

Conventionally, when selecting an operation mode such as fast forward or rewind from a stopped state or an operation mode in a tape recorder, a number of solenoids corresponding to the operation mode were provided, and the operation mode was switched by activating each solenoid. are doing.

[Problem that the invention seeks to solve]

Conventional devices for selecting and switching operating modes in tape recorders require a number of solenoids depending on the operating mode, which hinders reductions in size, weight, and cost.

The present invention was made to solve these problems, and is a compact and inexpensive tape recorder ([
) provides an operation mode selection switching device for

[Means for solving problems]

The configuration of an operation mode selection switching device for a tape recorder to which the present invention is applied in order to solve the above problems will be explained with reference to FIG. 1 corresponding to an embodiment.

As shown in the figure, the tape recorder operation mode selection switching device to which the present invention is applied has a cam 9 that drives the driven member 5 or 6 according to the selected operation mode.
, a cam 10 or a cam 8 is provided, and the drive transmission means 12 or the drive transmission means 18 in each operation mode is connected or disconnected by the driven movement of the driven member 5 or 6. A lower guide portion 66 is provided, and a guide pin 67 having a smaller diameter than the engaging portion 53 is provided above the engaging portion 53 of the driven member 5. By engaging the kite pin 67 with the guide portion 66, the cam 1
0 to induce the driven member 5 to follow.

[Effect]

The driven member 5 or 6 is driven by the cam 8, 9, or 10, and the drive transmission means 12 or 18 is operated according to each operation mode. At this time,
For example, if the cam lO suddenly attempts to engage the engaging portion 53 of the driven member 5, the engaging portion 53 is relatively thick and will not be smoothly guided to the cam surface 10a. In the configuration of the present invention, the guide pin 67 is engaged with the guide portion 66, so that the driven member 5 is smoothly guided by the cam 10.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an operation mode selection and switching device for a tape recorder according to the present invention will be described in detail.

FIG. 1 is a front view of a main part of an operation mode selection and switching device for a tape recorder to which the present invention is applied. The device shown in the figure is a device that selects and switches between fast forward (FF) mode, reverse fast forward (RWD) mode, and PRG mode (see Figure 2). Note that PRG mode is an abbreviation for program switching mode, and the playback operation is In this mode, the running direction of the tape is reversed (from side A to side B, or from side B to side A).

FIG. 1 shows a neutral (neutral) state of operation.

In the figure, 1 is a solenoid, 3 is a rotating body, 5 is a first driven member, 6 is a second driven member, 7 is a rotating body drive gear connected to a motor M, 11 is a positioning lever, and 12 is connected to a motor M. The reel drive gear 18 is a link member.

The plunger 41 of the solenoid 1 has operating pins 42 and 43 implanted therein. The plunger 41 is urged to rotate upwardly and forwardly by the operating pin 43 and the lever 44, but since the operating pin 42 is engaged with the positioning lever 11, the rotation of the plunger 41 is restrained. There is. An example of a circuit for controlling and driving the solenoid 1 is shown in Fig. 2, which includes switches FF and RWD/P for selecting each mode.
RG, switch O to stop rapid forwarding or reverse rapid forwarding
When FF is pressed, the timer circuit 40 outputs on signals for different times. The switching transistor Q is turned on by the on signal, and a driving voltage V is applied to the solenoid 1.

The details of the rotating body 3 are as shown in the top perspective view (a), side view (b), and bottom perspective view (C) in FIG.
is the center of rotation, and the sides are intermittent gears. A cam 8, a rotation guide portion 47, a stopper protrusion 48 projecting from the guide portion 47, and a pin 49 are fixed to the upper surface of the rotating body 3, respectively. Further, a cam 9 and a cam 10 are provided on the lower surface. The cam surface of cam 8 is 8a, the cam surface of cam 9 is 9a,
The cam surface of the cam 10 is 10a. A guide portion 66 with a sharp tip is provided at the tip of the cam 10 in the rotational movement direction. The height of the guide portion 66 is lower than the height of the cam 10. In the neutral state, the intermittent portion 3a faces the drive gear 7 as shown in FIG. Further, a spring 50 attached to the chassis is engaged with the pin 49, and the rotating body 3
Rotate +J counterclockwise.

The first driven member 5 is supported by a shaft 51 and has a spring 5.
2, and this state is stable. Driven member 5
A protrusion 53, which is an engaging portion, faces the lower surface of the rotating body 3.
is permanently installed. Furthermore, a guide pin 67 having a smaller diameter than the projection 53 is attached to the projection 53 . As described above, the guide portion 66 is provided at the tip of the cam 10, and the positional relationship is such that the guide portion 66 engages with the guide pin 67 when the rotating body 3 rotates. One end of the driven member 5 has a convex shape, and in the neutral state, the positioning lever 11 is at the tip portion 54.
is engaged in. A reel drive gear 12 is pivotally supported on the first driven member 5, and when the driven member 5 rotates, it meshes with a gear 13 on the forward reel side or a gear 16 on the reverse reel side via an idler gear 15. ing.

The second driven member 6 is supported by a shaft 58 and has a spring 5.
9, it is biased to rotate counterclockwise. A stopper pin 2 is implanted in the driven member 6 and contacts a stopper protrusion 48 of the rotation guide portion 47 of the rotating body 3 to stop the rotation of the driven member 6 and is urged to rotate by a spring 50. The rotating body 3 is stopped.

The positioning lever 11 is supported by a shaft 60 and biased counterclockwise by a spring 61. A roller 62 is attached to its tip and engages with the tip 54 of the driven member 5 . The rear upper surface 63 of the positioning lever 11 supports the operating pin 42 of the solenoid 1 and prevents the plunger 41 from rotating. and the upright surface 6 of the positioning lever 11
4 faces another operating pin 43 of the plunger 41 at a certain distance.

The link member 18 is on the rotation locus of the second driven member 6,
The driven member 6 is pushed and moved when it rotates significantly in the clockwise direction. The link member 18 is connected to the driven member 17 to which the gear 14 is attached, the pinch roller 31, the pinch roller 32, and the magnetic head 33 (see FIG. 11) by a link mechanism (not shown).

The operation of the above-mentioned operation mode selection switching device for a tape recorder will be explained.

(Fast forward (FF) operation) To select fast forward operation, press the switch FF shown in Figure 2.
When the button is pressed, an ON signal is output from the timer circuit 40, and the solenoid 1 sucks the amount shown by FF in the time chart of FIG. When the solenoid 1 is attracted from the neutral state (FIG. 1), it is pulled by the operating pin 42, the second driven member 6 rotates clockwise, the stopper pin 2 is disengaged from the protrusion 48, and the biasing force of the spring 50 is The rotating body 3 rotates slightly. Then, the gear portion of the rotating body 3 meshes with the driving gear 7, and the rotating body 3 makes one rotation (360°) and stops until the intermittent portion 3a next faces the driving gear 7. At this time, the second driven member 6 rotates while the solenoid 1 is sucking, but returns after the suction is stopped, and the pin 2 comes into contact with the guide portion 47 and remains stationary. At about 45 degrees in the middle of one rotation, the cam surface 9a of the cam 9 reaches the protrusion 53 of the first driven member 5, the cam 9 pushes the protrusion 53, and the driven member 5 begins to rotate clockwise.

Since the rotating body 3 continues to rotate, the driven member 5 continues to rotate by the cam 9, and when the state changes from the chain line shown in FIG. 5 to the solid line shown, the reel drive gear 12 meshes with the gear 13 and starts a fast-forwarding operation. That is, an operation mode as shown in FIG. 9 is realized.

As shown in FIG. 5, when the first driven member 5 rotates, its tip end portion 54 is disengaged from the roller 62 of the positioning lever 11. As shown in FIG. At this time, the suction of the solenoid 1 has already ended, and the plunger 41 is not in a loaded state, so it is rotatable. Therefore, the tension pressing of the operation pin 42 against the upper rear surface 63 of the positioning lever 11 is released, and the positioning lever 11 is rotated counterclockwise about the shaft 60 by being pulled by the spring 61. As a result, the roller 62 engages with the intermediate portion 55, the upright surface 64 approaches the operating pin 43 of the plunger 41, and the rear upper surface 63 pushes up the operating pin 42 against the bias of the spring 44 and pushes the plunger 41. Since it is rotated forward and upward, the operation pin 42 is disengaged from the second driven member 6. The fast forward operation continues in this state fB.

(Reverse fast forward (RWD) operation) To select reverse fast forward operation, press switch RW in Fig. 2.
When D is pressed, the ON signal from the timer circuit 40 causes the solenoid 1 to suck the amount shown by RWD in FIG. Similar to the fast forwarding operation, the reverse fast forwarding operation also starts from a neutral state, and the series of operations is also substantially the same as the fast forwarding operation. However, since the time at which solenoid l is sucked is different, the cams that perform effective work are different. I will mainly explain the differences.

During one rotation of the rotating body 3, the first driven member 5 is once rotated clockwise by the cam 9, but the solenoid 1 continues suction (see FF and RWD in Figure 4).
Therefore, the plunger 41 cannot be rotated. Therefore, the positioning lever 11 also does not rotate, and the first driven member 5
Only the roller 62 rotates, and the gap portion 55 once opposes the roller 62, but does not engage with it. After the rotating body 3 rotates and the cam 9 passes the protrusion 53 of the first driven member 5, the suction of the solenoid 1 is stopped. Then, the second driven member 6 returns counterclockwise, and the stopper bin 2 comes into contact with and follows the rotating guide portion 47.

As the rotating body 3 continues to rotate and the guide portion 66 at the tip of the cam lO reaches the guide pin 67 of the protrusion 53 as shown in FIG. 8, since the guide pin 67 is thinner than the protrusion 53,
The tip of the guide portion 66 is easily guided, and the cam surface 10a side is guided to the projection 53. Then, the cam 10 pushes the protrusion 53 and the driven member 5 rotates counterclockwise. 6th
When the state changes from the chain line to the solid line in the figure, the drive gear 12 meshes with the idler gear 15 and starts the reverse fast forwarding operation. That is, an operation mode as shown in FIG. 10 is realized. At this time, the movements of the positioning lever 11 and the solenoid 1 after the suction is completed are the same as in the case of the fast forward operation. The only difference is that the roller 62 of the positioning lever 11 engages with the intermediate portion 56 as shown in FIG. In this state, reverse fast forward operation is possible! ! Continue.

(Stop (OFF) operation) To stop the fast forward operation (or reverse fast forward operation), press the switch OFF in Fig. 2, and the timer circuit 40
In response to the ON signal from the solenoid 1, the solenoid 1 sucks the amount shown by OFF in FIG. When the solenoid 1 is attracted from the state shown in Fig. 5 (or Fig. 6), it is positioned on the operation pin 43, and since the upright surface 64 of 8-11 is close, it is pulled, and the position /<-11 is clockwise. The roller 62 rotates in the rotational direction.
The engagement between the portion 55 (or the fourth portion 56) between the first driven member 5 and the first driven member 5 is released. The first driven member 5 is pulled by the spring 52 and returns to the neutral state together with the positioning lever 11 since the roller 62 is no longer held.

The operating pin 42 is out of contact with the rear upper surface 63 of the positioning lever 11 and is in contact with the upper surface 57 of the second sliding member 6 . When the suction of the solenoid 1 is finished, it slides back along the upper surface 57, and is positioned at the point where the upper surface 57 ends and emerges from the rear upper surface 63 at /<-11. This completes the stopping operation and returns everything to a neutral state.

Since the second driven member 6 does not rotate during this stopping operation, a series of rotations of the rotating body 3 and the cam 9 resulting from the trigger operation occur.
(or the cam 10) does not rotate the first driven member 5, so the reel drive gear 12 is not rotated by the gear 13 or the gear 15.
It is possible to perform a stop motion without inducing other motions such as meshing with other motions, and to shift to a regeneration motion.

(Program (PRG) Operation) When selecting the program switching operation, the switch PRG in FIG. 2 is pressed. In response to the ON signal from the timer circuit 40, the solenoid 1 sucks the amount shown in PRG in FIG. 4. As a result, the pin 2 comes off and the gear portion of the rotating body 3 engages with the rotating body driving gear 7, and the rotating body 3 rotates once and then stops. 1
During the rotation, the cam 9 rotates the driven member 5 clockwise, and then the cam 10 rotates the driven member 5 counterclockwise. However, since the solenoid 1 continues suction, the plunger 41 cannot rotate and the positioning lever 11
Therefore, the first driven member 5 returns to the same state as the neutral state (the state in which the gear 12 is not engaged).
When the rotating body 3 has rotated about 270 degrees, the cam surface 8a of the cam 8 reaches the pin 2 of the second driven member 6 before the solenoid l stops suction, and the cam 8 pushes the pin 2 and the driven member 6 Start rotating clockwise. Immediately after this, the solenoid 1 completes suction and the plunger 41 returns, but the second driven member 6 continues to rotate, pushing the link member 18 as shown in FIG.

As shown by the solid line in FIG. 11, if the above program switching operation is performed while the gear 14 is engaged with the gear 13 and the pinch roller 31 is advanced to play back side A, then the link member 18 Due to the movement, the driven member 17 rotates in the direction shown by the chain line, and the gear 14 meshes with the gear 15.
The pinch roller 32 advances and comes into contact with the tape 23. That is, reproduction of side B, indicated by the dotted line in the figure, is started. Conversely, if the above program switching operation is performed while the B side shown by the dotted line in the figure is being played, the link member 18
Due to this movement, the driven member 17 rotates in the direction shown by the solid line, the gear 14 meshes with the gear 13, and the pinch roller 31
is advanced and playback of side A begins.

In the above configuration, the engaging portion 53 of the first driven member 5 is connected to the cam 9
Alternatively, in order to strongly withstand the oppression of the cam lO, a certain degree of thickness is required. After the first driven member 5 rotates due to the pressing action of the cam 9, when it returns to the neutral state by the force of the spring 52, if the return is insufficient, the cam 10 may not have been switched to the cam surface 10a side. be. At that time, if the guide part 66 and guide pin 67 were not configured, the tip of the cam 10 would hit the engaging part 53 and the rotating body 3 would continue to rotate, so the rotating body 3 or the driven member 5 etc. If the parts are damaged, the guide part 66 is
Since a guide pin 67 and a guide pin 67 are provided, and these are engaged to smoothly guide the driven force, damage to the parts can be prevented.

In the above embodiment, an independent timer circuit 40 was used to control the operating time of the solenoid 1, but it is also possible to share the timer of a microcomputer for controlling other devices.

Further, in the above embodiment, the guide portion 66 is provided only on the cam 10 among the cams 8, 9, and 10, but if the guide portions are provided on the cams 8 and 9 as well, the cam 8,
The cam 9 drives the driven member smoothly. When the cam 8 is provided with a guide portion, the guide pin is attached coaxially with the stopper pin 2 of the second driven member 6.

〔Effect of the invention〕

As described above, the operating mode selection switching device for a cheap record to which the present invention is applied can switch the mode drive transmission means by controlling the operating time of the solenoid and operating an effective cam. Therefore, a tape recorder using this device is extremely compact and inexpensive. Moreover, the movement by the cam requires a force of 1
Since the cam and the driven member are smoothly guided by the guide portion on the , side and the guide pin on the driven member side, there is no problem such as the cam and the driven member meshing, which was a common problem in the past.

[Brief explanation of drawings]

FIG. 1 is a front view of main parts of an embodiment of an operation mode selection switching device for a tape recorder to which the present invention is applied, FIG. 2 is a diagram showing an actual example of a circuit for driving a solenoid under 1j control, and FIG. 4 is a detailed view of the rotating body; FIG. 4 is a diagram explaining the relationship between the solenoid time chart and the rotation angle of the rotating body; FIGS. 5 to 7 are diagrams showing the operating state of the device of the above embodiment; 8
The figure is a perspective view illustrating the speech guiding state of the guide section, and FIGS. 9 to 11 are diagrams illustrating each operation mode of the tape recorder. ■ Solenoid 3, rotating body 5 1st
Driven member 6 Second driven member 7, rotary body drive gear 8/9 bow O, cam 11, positioning lever 12, fast feed drive gear 13, normal rotation reel side gear 14-,..., iq raw drive gear 15, idler gear 16,... , reverse reel side gear 17 driven member 18 , link member 40
Timer circuit 66, guide section 67 guide pin FF rapid traverse RWD, reverse rapid traverse

Claims (1)

[Claims] 1. In an operation mode selection and switching device for a tape recorder, a cam is provided to drive a driven member according to a selected operation mode, and the drive transmission means for each operation mode is switched on and off by the driven movement of the driven member. A guide portion lower than the cam is provided at the distal end portion in the direction of the driven member, a guide pin having a smaller diameter than the engaging portion is provided above the engaging portion of the driven member, and the guide pin is engaged with the guide portion. An operating mode selection switching device for a tape recorder, characterized in that the cam guides the driven member to be driven.