JPS6132739B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is provided with a switching plate that moves in a predetermined direction when the operating state is switched, and the switch can be switched in conjunction with the moving operation of the switching plate. The present invention relates to a switch switching mechanism for a tape recorder, etc., which is constructed in the following manner.

Conventionally, such a switch switching mechanism has a configuration that includes a pressing operation part that is pressed in the same direction as the switching plate movement direction, so the operating force required to move the switching plate is There is a problem in that the operating force required for the pressing operation of the pressing operation part of the switch is added, making it impossible to operate the switching plate smoothly and easily.

This invention was made to solve the above-mentioned problems, and includes a switching plate that moves in a predetermined direction by switching the operating state.
A switch is provided with a pressing operation part so as to have an operating direction substantially perpendicular to the predetermined direction, and a spring is provided between the operating member that can swing or rotate about a pivot and the switching plate. and the operating member is swung or rotated via the spring by movement of the switching plate in the predetermined direction,
A switch switching mechanism for a tape recorder or the like, wherein a switch is operated by pressing the pressing part with one end of the operating member, and at that time, the operating member comes into contact with a stop and restricts rotation of the operating member. Even if the amount of movement of the switching plate changes, the operating member can always press the pressing operation part with a constant stroke, and the pressing operation part can always be operated with a constant operating force. It was made so that it could be done.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of the main parts of a tape recorder including a switch switching mechanism according to an embodiment of the present invention, and FIG. This is a side view of the main parts of this tape recorder, and to explain these figures,
Reference numeral 1 denotes a sliding board that can slide in the direction of arrow G and in the opposite direction. The structure described in the specifications and drawings of Utility Model Application No. 54-41617 and Utility Model Application No. 54-41618 (name of the invention: "Magnetic head adjustment mechanism for magnetic recording/reproducing device"), which have been applied for registration, namely: Support boss 2,
3, hole 4, bearing plate 5, adjustment plate 6, support shaft 7, screw 8, spring 9, adjustment screw 10, operating arm 11, support hole 12, 12', 13, 13', head base plate 1
4. Magnetic head 18, screw 19, support shaft 20, springs 21, 22, azimuth adjustment screws 24, 25, lower position adjustment screw 26, upper azimuth adjustment screw 2
7, etc., and for a detailed explanation of the operations of configurations 2 to 27, refer to the specification and drawings.In short, the magnetic head adjustment mechanism on the sliding substrate 1 The magnetic head 18 is pivotally mounted on the end of the actuating arm 11 by rotating the actuating arm 11 in a predetermined direction about the fulcrum 20.
The operating arm 1 is capable of changing the height of the operating arm 1.
1 to a predetermined location on the support shaft 20 using the elastic force of the spring 22, and furthermore, using the elastic force of the spring 9 to move the actuating arm 11 around the support shaft 20. By biasing the magnetic head 18 counterclockwise, the height position of the magnetic head 18 can be stably maintained after the operating arm 11 is rotated in a predetermined direction.

32 is a switching arm, and this switching arm 3
2 is configured to be able to swing freely around a pivot shaft 1D that is planted and fixed on the sliding base plate 1, and has a cover portion 3 at one end.
2a, and a bent engagement portion 32b at the other end. A force receiving portion 11D of the actuating arm 11 is attached to the cover portion 32a at one end of the switching arm 32.
is inserted, the switching arm 32 is connected to the pivot 1D.
When the actuating arm 11 swings around , the actuating arm 11 rotates in the direction of arrow E in FIG. 2 or in the opposite direction.
Bent engagement portion 32D at the other end of the switching arm 32
The switching arm 32 is constantly applied with a rotational force in a counterclockwise direction about the pivot shaft 1D by the suction spring 33 in the direction in which the switching arm 32 presses against the inner wall 34b of the housing portion of the switching plate 34. Note that this spring 33 is the switching arm 3.
2 and the first spring hook part 32C of the other end of the switching plate 34.
It is compressed and mounted between the spring hanging part 34C on the upper right end of the drawing. The switching plate 34 has elongated holes 34 having the same major diameter direction, into which two guide pins 1E, 1E, which are planted and fixed on the sliding substrate 1, are loosely inserted.
a, 34a, and a suction spring 34
is always biased in the direction of arrow C.
This spring 36 is attached to the spring hanging portion 1 on the sliding board 1.
F and the spring hanging part 34D at the left end of the switching plate 34
It is mounted between. In addition, this switching plate 34
The protrusion formed in the center region of the lower end in FIG.
A roller 35 is rotatably attached to.
Note that this roller 35 is arranged at a position where it can engage with the right end 37C of the switching plate 37 when the switching plate 34 slides in the direction of arrow C. The switching plate 34 moves the force receiving portion 11D of the actuating arm 11 in the direction of the arrow E until the lower ends of the lower position adjustment screw 26 and the lower azimuth adjustment screw 27 of the magnetic head 18 come into contact with the surface of the sliding substrate 1. In order to rotate the switching arm 32 to the right around the pivot 1D (in the direction of arrow D), the switching arm 32 is rotated using the pulling force of the spring 36.
2 is biased through its inner wall 34b and the bending engagement portion 32D. 31 is a magnetic head for erasing, and this magnetic head 31
is fixed to the support shaft 1C on the sliding substrate 1 by a screw 31a, and can come into sliding contact with the magnetic tape (see FIG. 5) during recording or reproduction. The sliding substrate 1 has guide elongated holes 1a, 1a, 1a on the surface of the fixed substrate 30, into which planting fixing pins 30a, 30a, 30a are inserted, respectively. Further, the switching plate 37 has elongated holes 3 into which pins 30D, 30D for planting and fixing are inserted into the fixed substrate 30.
7b, 37b (both have their major axes in the direction of arrow C or F), and the spring hanging part 37a in the protrusion at the lower right end and the fixed board 30.
It is constantly biased in the direction of arrow C by the spring 41 mounted between the spring hook 30C and the spring hook 30C.
Furthermore, this switching plate 37 has an elongated hole 37D having a long diameter in the direction of arrow G in its central region. A pin 40a formed on one arm of a freely movable bent arm 40 is inserted, and a cap portion 3 is inserted at the lower end slightly to the left of the center area.
It has 7E. The cover portion 37 of this switching plate 37
E corresponds to the arrow C or downward sliding position of the switching plate 37 to control the prevention of movement of the pin 48D installed on the surface of the recording operation lever 48 in the arrow G direction. The pin 48D is located in the path of the pin 48D or is not located in the path of the switch plate 37. At the same time, when the recording operation lever 48 is pressed in the direction of the arrow G, the pin 48D moves into the cover of the switching plate 37. 3
7E, that is, when in the recording state, the switching plate 37 is prevented from sliding in the direction of arrow F. A lock pin 38 fixedly planted at the tip of the lower left protrusion of the switching plate 37 can be engaged with a switching lock plate to be described later. In addition, the switching plate 3
One side portion 37h of the upper left end protrusion of 7 is the switching plate 37
The tension spring 3 is mounted between the spring hook 37G of the switch operation arm 53 and the spring hook 53C of the switch operating arm 53.
9, the switch operating arm 5
It receives a pressing force from the engaging portion 53b of No. 3. The switch operating arm (operating member) 53 is the fixed board 30
It has a bent arm that can swing freely around a pivot 30p fixed to the
This arm 53 is urged to rotate in the direction of arrow L by the pulling force of the above-mentioned spring 39, and the operating portion 53a at the end of one arm is connected to the hole 300 of the fixed base plate 30.
The arm 5 is formed at a position facing the arm ₅ .
3, the push operation section 52 of the switch 52 is pressed.
It is configured so that it can press a. Further, this switch operation arm 53 is connected to the pressing operation section 52a.
When the switch 52 is turned on by pressing , the operating portion 53a comes into contact with the abutment ₃₀₀₁ of the hole 300 and its rotation is restricted. The switch 52 has the function of switching between channels recorded on the magnetic tape shown in FIG. 5 in a circuit manner in response to the vertical movement of the magnetic head 18. Note that this switching is performed by the magnetic head 18.
When the magnetic tape moves from track 1 to track 2 in FIG. 5, the running direction of the magnetic tape is reversed by a tape drive mechanism (not shown), but the channel changes from the right (R) channel to the left channel.
(L) channel, this means a circuit change corresponding to this channel change. 54 is a switching lock plate, and this switching lock plate 54 (see FIG. 3 for the detailed side shape) is swingably supported by a stepped pivot 30Q fixed to the fixed base plate 30, and is Winding coil spring 55 [This winding part is the lock plate 5
4 in the direction of arrow H (FIG. 3)] is engaged with the bending spring hanging portion 54F. The other end of the spring 55 is in contact with a stop pin 30R fixed to the fixed base plate 30, and the spring 55 is moved toward the switching lock in a direction that increases the opening angle formed by the pivot shaft 30Q at both ends of the spring 55. Since the bending spring hanging portion 54F of the plate 54 is pressed, the switching lock plate 54 is always urged to rotate in the direction of arrow I.
This switching lock plate 54 receives a rotation biasing force in the direction of arrow I from the spring 55, and the locking pin 30R
Since the protrusion 54G of the lock plate comes into contact with the
The structure is such that it cannot be rotated further in the direction of arrow I than the position in FIG. The left end of the switching lock plate 54 is formed into a curved shape so that it can receive a pressing force from the lock pin 38 fixed to the tip of the lower left end protrusion of the switching plate 37 as the lock plate 54 slides in the direction of arrow F. Then, when the left end curved portion 54a of the lock plate 54 receives a pressing force from the lock pin 38, the lock plate 54 is rotated about the pivot 30Q in a direction opposite to the direction of arrow I.
A notch is formed in the lower tip of the left end curved portion 54a of the lock plate 54, and a cut is formed in the lower tip of the left end curved portion 54a.
A protrusion 54b is formed at a location facing the lower tip through this cut. Therefore, the switching plate 37 slides in the direction of the arrow F, and the lock pin 38 rotates the lock plate 54 in the direction opposite to the direction of the arrow I, and the lock pin moves into the left end curved portion 54a of the lock plate. When the lock plate 54 passes through the lower tip and is inserted into the notch, the lock plate 54 can no longer receive any pressing force from the lock pin 38, and is rotated in the direction of arrow I by the elastic force of the spring 55. Then, the lock pin 38 collides with the protrusion 54b. Next, the switching plate 37
When the switch plate 37 slides in the direction of arrow C, the lock pin 38 comes into contact with the curved inner wall 54D of the notch and slides on the inner wall surface of the notch. The lock pin 38 is prevented from sliding in the inner wall 54D, resulting in the state shown in FIG. 4. Also, from the state shown in Figure 4, again,
When the switching plate 37 is slid in the direction of arrow F, the lock pin 38 moves toward the relief part 54C in the notch, and the lock plate 54 is disengaged from the lock pin 38 at the relief part 54C. The resilient force of the spring 55 returns it to the same position as shown in FIG. It engages with the bent portion 54E within the notch. Then, move the switching lock plate 37 in the direction of arrow J (Fig. 3).
When the locking pin 38 is rotated to
4E, and the lock pin 38 also returns to the state shown in FIG.

A pin 4 fixed to the tip of the other arm of the bent arm 40
0b is inserted into the horizontally long hole 42b of the switching operation lever 42, and the vertically long hole 42a of this lever 42,
42a has a guide pin 3 planted on the fixed substrate 30.
0F and 30F are penetrated. When this lever 42 is pressed in the direction of arrow G, the pin 40b inserted into the horizontally long hole 42b of this lever 42 also moves in the direction of arrow G and slides inside this horizontally long hole 42b, so that the bent arm 40 The switching plate 37 rotates clockwise about the pivot 30E, and as a result, the switching plate 37, in which the pin 40a fixed to the tip of one arm of the bent arm 40 is inserted through its vertical hole 37D, slides in the direction of the arrow F. The lock pin 38 fixed to the tip of the lower left protrusion of the switching plate 37 is locked to the lock plate 54 by the above-described operation (see FIG. 4). When the lever 42 is further pressed in the direction of arrow G from the state shown in FIG. 4, the lock pin 38 and the lock plate 5 are
4 and 4 release their engagement with each other and return to the state shown in FIG. 1 through the above-described operation.

Next, the 43 is a playback operating lever, and the vertical long hole 43a of this playback lever 43 is 43a, and the 43a is a fixed substrate 30g of a fixed substrate 30g, 30 g, 30.
G is inserted through the regeneration operation lever 43, and the spring hook 43b near the upper left end of the regeneration operation lever 43 and the spring hook 30J fixed to the fixed base plate 30 are installed with a suction pressure. Due to the pulling force of the spring 45, the regeneration operation lever 43 is always urged in a direction opposite to the direction of arrow G. Further, the upper right protrusion 43D of the regeneration operation lever 43 is located at a position slightly apart from the upper end 1h of the left end protrusion of the sliding board 1 in FIG.
h, and the spring hooking portion 43C on the protruding portion near the upper right end of the regeneration operation lever 43 and the spring hooking portion 1G on the left end protruding portion of the sliding board 1. A suction spring 44 is mounted between them, and this spring 44 always urges the sliding board 1 in the direction of arrow G.

Reference numeral 43E is a pin planted and fixed at the upper end of the regeneration operating lever 43, and is used to slide a lock plate 50, which will be described later, in the direction of arrow C or F.
Reference numeral 48 denotes a recording operation lever, and pins 30h, 30h fixed to the fixed base plate 30 are inserted into vertical holes 48a, 48a of this recording operation lever 48. A suction spring 46 is installed between the spring hook part 48b on the left side of the upper end and the spring hook part 30K planted and fixed on the fixed board 30.
is mounted. This spring 46 always urges the recording operation lever 48 in the direction opposite to the direction of arrow G.

48C is a pin planted and fixed at the upper end of the recording operation lever 48, and this pin 48C engages with the lock plate 50 to slide it in the direction of arrow C or F, which will be described later. It is possible.
Reference numeral 49 denotes a stop operation lever, and pins 30i, 30i fixed to the fixed base plate 30 are inserted into vertical holes 49a, 49a, respectively. Lever 49
A suction spring 47 is installed between the spring hanging part 49b on the upper left side and the spring hanging part 30L planted and fixed on the fixed base plate 30.
7 always urges the stop operation lever 49 in the direction opposite to the direction of arrow G. 49C is a pin planted and fixed on the upper end of the stop operation lever 49, and this pin 49C is attached to the lock plate 50 to slide the lock plate 50, which will be described later, in the direction of arrow C or F.
It is something that engages with.

50 is a lock plate, and this lock plate 50
The spring hanging part 30M is planted and fixed on the fixed base plate 30.
and the spring hook part 50b at the left end of the lock plate.
The lock plate 50 is always biased in the direction of arrow C by the pulling force of the tension spring 51 installed between the along the lower edge. The pin 43 of the regeneration operation lever 43 moves when the slope of the hook portion 50C is pressed in the direction of the arrow G.
By being pressed by E, the lock plate 5
0 slides in the direction of arrow F, and when the regeneration operation lever 43 is pressed until the engagement between the pin 43E and the slope of the hook 50C is released, the pin 43E fits into the notch of the hook 50C. After the lock plate 50 is moved slightly in the direction of arrow C by the pulling force of the spring 51, the pin 43E prevents the lock plate 50 from sliding in the same direction. Even when the recording operation lever 48 is pressed in the direction of the arrow G and moved in the same direction, the engagement and disengagement relationship between the hook portion 50F of the lock plate 50 and its pin 48C, and the sliding movement of the lock plate 50 also change. The operation is similar to the above-mentioned operation of the playback operation lever.

When the stop operation lever 49 is pressed in the direction of arrow G and moved in the same direction, the pin 49C of the lever 49 presses the sloped protrusion 50G of the lock plate 50, so that the lock plate 50 is moved in the direction of arrow C. slide it. Therefore, even if the recording operation lever 48 or the playback operation lever 43 is locked in the pressing operation position (see FIG. 6) via the hook portions 50F, 50C of the lock plate 50 by the respective pins 48C, 43E. ,
When the stop operation lever 49 is pressed, the lock is released and the locks return to their original states, which is the same as in the conventional known lock mechanism.

The mechanism according to the embodiment of the present invention has the above-mentioned configuration, and next, the specific operation of the mechanism will be explained in detail.

As shown in FIG. 1, each lever 42, 43, 48,
49 is in the non-operating position, the magnetic head 18 is always operated by the urging force of the switching plate 34, the switching arm 32, and the operating arm 11 due to the pulling force of the spring 36.
It is urged in the direction of arrow K (see FIG. 2), and at this time, the roller 35 at the left bent end of the protrusion in the lower central area of the switching plate 34 is moved toward the right end 37C of the switching plate 37. Then, when the regeneration operation lever 43 is pushed in the direction of arrow G, the pulling force of the spring 44 hanging on the upper right side of the lever 43 causes
The sliding board 1 slides in the same direction while being guided by pins 30a, 30a, 30a that can be inserted into the elongated holes 1a, 1a, 1a. When the sliding substrate 1 is sufficiently slid, the protruding portion 1h at the left end thereof and the right protruding portion 43D of the reproduction operation lever 43 are separated.
This separation means that the amount of movement of the regeneration operation lever 43 is larger than the amount of sliding of the pin 30a in the elongated hole 1a, and when the pin 30a comes into contact with the inner wall of the elongated hole 1a, the pulling force of the spring 44 is reduced. Even if it acts on the moving board 1, the sliding board 1 cannot slide any further in the direction of arrow G, and on the other hand, there is still some pressure left in the regeneration operation lever 43. It is from.
Further, the reproduction operation lever 43 is locked in the pressing operation position by the hook portion 50C of the lock plate 50 via its pin 43E, and in conjunction with this operation, the magnetic tape in the already loaded cassette half 60 is The magnetic head 18 and erasing magnetic head 31 come into contact with each other, and the tape is then moved at a constant speed (playback speed, recording speed).
The tape drive mechanism that runs the tape is driven.
The magnetic head 18 is in contact with the magnetic tape on the channel 1 side of FIG. 5, and the content recorded on the channel 1 side of the tape is reproduced via a reproduction circuit (not shown). When the magnetic head 18 is moved back in the direction away from the magnetic tape, that is, in the direction of arrow G, for example, when performing a pause operation or a song interval detection operation, the height position of the magnetic head 18 does not change.

Next, to set the recording state, simultaneously move the playback control lever 43 and the recording control lever 48 to the arrow G
The subsequent locking operation is as described above, and in this case, the recording circuit is activated (erasing head 31 is activated) and the tape is run at a constant speed (see Figure 6). .

In the embodiment described above, since only one-way recording is performed, the erasing head 31 erases the channel 1 side of the magnetic tape in FIG.

Next, a mechanism for switching the magnetic head to the channel 2 position shown in FIG. 5 will be described. When the recording operation lever 48 is pressed and locked, the blocking pin 4
8D is located within the cover portion 37E of the switching plate 37. In this state, even if the switching operation lever 42 is pressed in the direction of the arrow G, the switching plate 37 cannot be moved in the direction of the arrow F because the blocking pin 48D is in contact with the left side wall of the shell portion 37E. In the recording state, the height position of the magnetic head 18 is prevented from being changed. Next, to cancel the playback and recording state, press the stop operation lever 49 in the direction of arrow G, move the lock plate 50 in the direction of arrow F, and release the lock pins 43E, 48C, hook portion 50C,
This is done by releasing the engagement with 50F and returning it to the original position by the pulling force of the springs 45, 46. When the pressing force is released, the stop operation lever returns to its original state due to the pulling force of the spring 47.

Next, the case where the magnetic head 18 is moved upward to the position of the track 2 on the magnetic tape shown in FIG. 5 will be explained. In the state shown in FIG. When the switching plate 37 is pressed against the pulling force of the switching lock plate 54, the switching plate 37 starts to move in the direction of the arrow F, and after the lock pin 38 slides on the curved portion 54a of the switching lock plate 54, the blocking protrusion 54b
comes into contact with. At the same time, the switch operating arm 53 begins to rotate in the direction of the arrow L, and the operating pin 53a switches the switch 52 by pressing its pressing operation portion 52a, and the contact 300 of the switch 52 hits the hole 300.
Rotate until it touches ₁ . Furthermore, when the switching plate 37 slides in the direction of arrow F, the switch operating arm 5
3, since the operation pin 53a is in contact with the above contact ₃₀₀₁ , it cannot rotate any further, and the spring 3
9 only expands, and the abutment 37h and the engaging portion 53b come out of contact. On the other hand, the right end 37C of the switching plate 37 presses the roller 35 of the switching lever 34 in the direction of arrow F, so that the switching lever 34 is pushed in the same direction against the pulling force of the spring 36, and the spring 33 The switching arm 32 is rotated in the direction opposite to the arrow D by the pulling force, and the force-receiving portion 11D of the actuating arm 11 is rotated in the direction opposite to the arrow E by the cover portion 32a of the switching arm 32. Then, the head base plate 14 comes into contact with the upper position adjustment screw 24 and the upper azimuth adjustment screw 25. In this case, the magnetic head 18 is urged in the direction opposite to the arrow K by the pulling force of the spring 33. The amount of rotation of the switching arm 32 stops at the position where the screws 24 and 25 contact the head base plate 14, and even if the switching lever 34 moves further in the direction of the arrow F, the engaging portion 32D and the pressing portion 34b do not come into contact with each other. It comes off and only the spring 33 is deflected. Next, when the pressure on the operating lever 42 is released, the lock pin 38 is locked and held in the notch 54D of the switching lock plate 54 (see FIG. 4). In this case, as described above, the switch 52 has the function of switching channels, and this switch switching mechanism has the advantage that a large movement stroke can be achieved after the switch is operated. Similarly, there is an advantage that the movement stroke of the switching lever 34 for switching the head after switching can be made large. In this state, when the regeneration operating lever 43 is pressed, the roller 35 of the switching lever 34 rotates on the right end 37C of the switching plate 37 and moves in the direction of arrow G, resulting in the regeneration state. In this case, it has the above-mentioned advantage that the height relationship of the heads does not change even if the operation from the stop position to playback is performed. When the recording state is entered at the head position, the magnetic head 18 is at the track 2 position (FIG. 5), and the erasing head is at the track 1 position, so recording and erasing do not coincide. Therefore,
Delete tracks 1 and 2 and move to track 31 (Figure 5)
Since this will be recorded, the mechanism for preventing this will be explained next. When the magnetic head 18 is in the channel 2 position (FIG. 5) in the playback state, that is, in the position indicated by the two-dot chain line in FIG. ) operates and runs the magnetic tape. In this case, the switching plate 37
Since the hit 37F is in the corresponding position,
Even if the recording operation lever 48 is pressed, the blocking pin 48C hits the lower end 37F of the switching plate, making it impossible to move it in the direction of arrow G. Next, when returning the magnetic head 18 to the channel 1 position (FIG. 5) again, from the state shown in FIG. When the lock pin 38 of the switching plate 37 is moved, the lock pin 38 of the switching plate 37 is inserted into the escape hole 54 of the switching lock plate 54.
C, and then release the pressing force, the spring 4
Move in the direction of arrow C with the pulling force of 1 and lock pin 38
contacts the bent portion 54E of the switching lock plate 54, and the switching lock plate 54 is rotated in the direction of arrow J (FIG. 3), thereby returning to its original state.

On the other hand, when the switching plate 37 begins to return in the direction of arrow C, the engaging portion 53b and the engaging portion 37h come into contact with each other, and the switch operating arm 53
By rotating the switch 52 in the direction opposite to the direction of the arrow L, the switch 52 returns to its original state (by means of a return means not shown). On the other hand, the switching plate 37
By returning to the direction, the switching lever 34 is also moved in the direction of arrow C by the pulling force of the spring 36, and the pressing portion 3
4b comes into contact with the engaging portion 32D of the switching arm 32 and the switching arm 32 rotates in the direction opposite to the direction of the arrow D, thereby urging the magnetic head 18 in the direction of the arrow K as described above.

Although the switching of the magnetic head 18 has been explained in the stopped state, switching in the reproducing state is also possible.

As described above, the present invention is configured such that when the operating member rotates to operate the push operation portion of the switch, one end of the operating member comes into contact with the abutment, thereby restricting the rotation of the operating member. Even if the amount of movement of the switching plate in a predetermined direction changes, the operating member can always operate the switch with a constant stroke and a constant operating force, and the switching operation of the switch can always be performed reliably. It is possible to obtain the functions and effects that can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the main parts of the tape recorder including the switch switching mechanism of the tape recorder, and FIG. 2 is a view taken along the line A-A' in FIG. 1. A side view of the main parts of the magnetic head switching mechanism as seen in the direction of the arrow, Figure 3 is similar to Figure 1B-
FIG. 4 is a side view of the main parts of the magnetic head switching mechanism as seen in the direction of the arrow on line B', and FIG. 4 is a main part of the magnetic head switching mechanism for explaining the operation of each part when the magnetic head is raised. FIG. 5 is a schematic diagram showing the positions of channels and tracks of the magnetic tape used in the magnetic head switching mechanism, and FIG. 6 is a side view of essential parts of the magnetic head switching mechanism in a recording state. 300...hole, 300 ₁ ...hit, 30P...
Pivot, 37... Switching plate, 37... One side, 39...
...Spring, 40... Bent arm, 42... Lever, 52...
...Switch, 52a...Press operation section, 53...Switch operation arm, 53a...Operation pin, 53b
...Engagement part.

Claims (1)

[Scope of Claims] 1. A switching plate 37 that moves in a predetermined direction according to an operation for switching the operating state is provided, and a pressing operation portion 52a having an operating direction substantially orthogonal to the predetermined direction is provided. An operating member 5 provided with a switch 52 and rotating around a pivot 30p.
3 above the rotation range of one end 53a of the switch 5.
The operating member 53 is rotatably provided so that the second pressing operation portion is located therein, and the operating member 53 is rotated within a rotation range in the operating direction in which one end 53a of the operating member 53 comes into contact with the pressing operating portion 52a. 30 to regulate
Further, a spring ₃₉ is suspended between the other end 53b of the operating member 53 and the switching plate 37, and a spring 39 is suspended between the other end 53b of the operating member 53 and the switching plate 37. When not in operation, the operation member 53
The rotation is regulated by the end portion 37h of the switching plate 37, and as the switching plate 37 moves in a predetermined direction, the operating member 53 is pulled by the spring 39 and rotates in the operating direction. However, when the one end 53a of the operating member 53 abuts against the press operating portion 52a to operate the switch 52, the one end 53a of the operating member 53 abuts the abutment ₃₀₀₁ , thereby restricting rotation of the operating member 53. A switch switching mechanism for a tape recorder, etc., characterized by the following features: