KR940004497B1 - Mode exchange apparatus & method for cassette tape recorder - Google Patents

Abstract

The apparatus is for changing the modes with a cam and a solenoid so that the parts for assembly are decreased. The rotation power of a main gear (11) for driving the tape is transferred to a first reel gear (18) through a first transfer gear (14), an upper link gear (15), a lower link gear (16), a shift gear (46), a third transferring gear (20), and an intermediate gear (19). When a shift lever (31) shifts to the clockwise direction, the right pinch roller contacts to a driving shaft so that the head as well as the pinch roller are operated to play the tape.

Description

Mode conversion apparatus and method of cassette tape recorder

1 is a plan view showing a stop state of the present invention.

2 is a plan view showing a play state of the present invention.

3A and 3B are plan views showing record states of the present invention.

4a, b, c are plan views showing reverse play states of the present invention;

5a and b are plan views showing a reverse recorder state of the present invention.

Figure 6 is a perspective view showing the relationship between the mode switching means, the operating means and the regulating means of the present invention.

7 is a perspective view showing the relationship between the moving means and the selection means of the present invention.

8 is a schematic diagram showing an operation path according to each mode conversion of the present invention.

8A is a stop state.

FIG. 8B is an operation path until the mode is changed to the play state. FIG.

8C shows the operation path until the mode is changed to the record state.

8d is an operation path until the mode is changed to the reverse play state.

8E shows the operation path until the mode is converted to the reverse record state.

FIG. 8F is an operation path from the play, record, reverse play, and reverse record state until the mode is changed to the stop state.

* Explanation of symbols for main parts of the drawings

1: main plate 2, 2a: long hole

3: fixing plate 4, 4a: pin

5: moving plate 6: motor

7: solenoid 8: switch

9, 9a: capstan 10: auxiliary pulley

11: main gear 12: main pulley

13: belt 14: first power transmission gear

15: upper driven gear 16: lower driven gear

17: 2nd power transmission gear 18: 1st reel gear

18a: Second Reel Gear 19: First Intermediate Gear

19a: 2nd intermediate gear 20: 3rd power transmission gear

21: cam gear 23: protrusion

23a: first route 23b: second route

24: Outer cam 25: Inner cam

26: bottom cam 28: mode switching lever

29: push piece 30: projection

31: moving lever 32: long

33: upward projection 34: downward projection

35 extension part 36: operation lever

37: torsion spring 38: groove

39: operating rod 40: locking groove

41: jamming 42: regulatory lever

43: spring 44: selection lever

45: long hole 46: moving gear

The present invention relates to a mode conversion apparatus and method for a cassette tape recorder, and in particular, a mode conversion is possible even by using a single cam gear and a solenoid.

In general, a cassette tape recorder is a device that plays back the sound recorded on the tape or records the external sound on the tape. Together, the present invention has a mode conversion device and method for selecting and recording external sounds on the A or B side of the tape.

The mode conversion by the mode conversion device is performed by the associative operation of the cam gear rotated by the driving of the motor and the solenoid operated by the supply of power. In the related art, two cam gears and two solenoids are provided.

That is, one cam gear is a mode selection cam gear and another cam gear is a switching cam gear, and each cam gear has a solaid that controls the operation of the cam gear.

Therefore, the conventional mode conversion device has a dual structure of power transmission means and mode conversion means for operating each cam gear and solenoid, so that the structure is complicated by the increase in the number of parts. There was a problem that miniaturization and thinning were difficult.

The present invention has been made to solve the above problems, by using a single cam gear and solenoid to enable the mode can be changed in various ways according to the user's choice to reduce the parts, thereby reducing the production cost In addition, the present invention aims to achieve miniaturization and thinning of equipment.

According to an aspect of the present invention for achieving the above object, a movable plate movably installed between the main plate and the fixed plate, relay means installed on the main plate and the fixed plate to relay the power generated by the motor within a predetermined section; A power transmission means for receiving and transmitting the power of the motor relayed by the relay means, a cam assembly installed on the fixed plate and selectively rotating under the power transmitted by the power transmission means, and a solenoid installed on the main plate. Switching means for changing the mode according to the operation of the movement, the moving means is installed on the main plate to move the moving plate to the left, right in accordance with the rotation of the cam assembly, and elastically installed on the fixed plate to move A mechanism that allows the switch to be operated with selective rotation when the plate moves And means for resiliently installed on the mayplate to regulate rotation of the operating means while rotating together with the mode conversion means, and being installed on the main plate and rotating together with the rotation of the moving means. Cassette tape recorder that allows mode switching means to change modes through two different paths of cam assembly, including selection means to transfer power to record and reverse play and reverse record. An apparatus and method for mode conversion of an order are provided.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 1 through 8 of the accompanying drawings.

1 is a plan view showing a stop state of the present invention, FIG. 2 is a plan view showing a play state, and FIG. 3 is a plan view showing a record state.

FIG. 4 is a plan view showing a reverse play state, FIG. 5 is a plan view showing a reverse record state, and FIG. 6 is a perspective view showing the relationship between the mode switching means, the operating means, and the restriction means.

7 is a perspective view showing the relation between the moving means and the selecting means, and FIG. 8 is a schematic diagram showing an operation path according to each mode change.

The present invention is integrally formed with a main plate (1) on which a plurality of components are installed, and a fixed plate (3) having a pair of long holes (2) (2a) fixed at regular intervals on the main plate (1). A movable plate installed to be movable between the fixed plate 3 and the main plate 1 by allowing a pair of pins 4 and 4a to protrude through a pair of long holes 2 and 2a formed in the fixed plate 3. (5), the relay means installed on the main plate 1 and the fixed plate 3 to relay the power generated by the motor 6 within a predetermined section, and the motor 6 relayed by the relay means. A power transmission means for receiving power and transmitting the hinge, a cam assembly hinged to the fixed plate 3 and selectively rotating in response to the power transmitted by the power transmission means, and a solenoid 7 hinged to the main plate 1. Mode switch to switch modes according to However, the hinge means coupled to the main plate (1) to move the movable plate 5 to the left, right according to the rotation of the cam assembly, and the elastic plate is elastically installed on the fixed plate (3) Actuating means for operating the switch (8) while the selected rotation during the movement of the), and the elasticity is installed on the main plate (1) is regulated to regulate the rotation of the operating means while rotating together with the rotation of the mode switching means The hinge is coupled to the main plate 1 and rotates together when the moving means rotates, thereby applying power during play, record, reverse play, and reverse record. It is largely made of a selection means that enables selection delivery.

The relay means is provided with a pair of capstan (9) (9a) to be rotatable on the fixed plate (3) and the auxiliary pulley (10) and the main plate (11) downward on the main gear (11). Belt 13 is installed so that the capstan (9) (9a), the auxiliary pulley (10), the main pulley (12) can be rotated by the drive of the motor (6) Is connected.

The power transmission means includes a first power transmission gear 14 for transmitting the rotational force of the main gear 11, an upper driven gear 15 and a lower driven gear 16 meshed with the first power transmission gear to rotate together. A second power transmission gear 17 engaged with the upper driven gear 15 to rotate together; a first reel gear 18 and a second reel gear 18a for driving the tape; and the reel gear. And a first intermediate gear 19 and a second intermediate gear 19a meshed with (18) (18a), and a third power transmission gear 20 connected to the second intermediate gear 19.

On the other hand, all the gear is hinged to the rotatable main plate (1).

The cam assembly is formed by a plurality of protruding pieces 23 having various shapes on the outer side of the cam gear 21 on which the racks 22 are formed at predetermined intervals on the outer circumferential surface thereof, so that the first path 23a and the first path 23a An outer circumferential cam 24 having two paths 23b, an inner circumferential cam 25 formed on the inner side of the cam gear 21 in a plane, and a bottom cam 26 formed on the bottom surface of the cam gear 21; It is composed.

In addition, the engaging cams 27, 27a, 27b are formed in the outer circumferential cam 24, so that the mode switching means is the first path 23a and the second path 23b according to the selected mode when the cam gear 12 rotates. ) To stop, play, record, reverse play, reverse record as you jam.

Mode switching means is a mode switching lever 28 to switch the mode according to the operation of the solenoid (7), and the pressing piece 29 and integrally formed on the mode switching lever to rotate the control means and the The protrusion 30 is formed below one side of the mode switching lever 28 and connected to guide the outer cam 24.

The moving means forms the long hole 32 on one side of the moving lever 31 and the upper protrusion 33 on the other side thereof so that the long hole 32 is coupled to one side pin 4 formed on the moving plate 5. In addition, the moving lever 31 is integrally formed with an extension piece 35 having a downward projection 34 downward, and the downward projection 34 is connected to the inner circumferential cam 25.

The actuating means is the actuating lever 36 is elastically installed by the torsion spring 37 and the torsion spring 37 is constrained to the other pin 4a whose end is fixed to the moving plate 5.

In addition, one end of the actuating lever 36 forms a recess 38 so that the actuating rod 39 of the switch 8 is fitted into the recess and the other end is selectively restricted by the restricting means. .

The restricting means is provided with a control lever 42 having a locking groove 40 and a locking protrusion 41 integrally installed at the end thereof by a spring 43, and the control lever 42 has a mode switching lever 28 and It is hinged on the same axis.

The selection means includes a selection lever 44 coupled coaxially to the lower side of the lower driven gear 16 and a long hole 45 formed at one side of the selection lever and fitted to the other upper projection 33 of the moving lever 31. And a moving gear 46 rotatably installed on the other side of the selection lever 44 and engaged with the lower driven gear 16 so that the movement gear 46 when the selection lever 44 rotates is formed in a third position. It is to be selectively engaged with the power transmission gear 17 and the second intermediate gear (19a).

Reference numeral 47-47b denotes a 1-3 spacing, 48 an elastic lever, and 49-49h denote a first-ninth inclined plane.

The effects of the present invention configured as described above and the effects thereof will be described below.

In the present invention, the mode can be converted to stop, play, record, reverse play, reverse record, and the mode change is possible by controlling a function by a control means according to the user's mode selection.

Here, for convenience, the mode switching lever 28 is in a stop position when the position is at the stop state of all the levers, that is, the state connected to the inner surface of the outer circumference cam 24 is called A ₁ , and is in a neutral state. La and a _2, it is assumed that the connection state of the outer surface of the outer cam (24) a _3.

In addition, the moving lever 31 is assumed to be B ₁ when it is in the stop position, that is, when it is in a neutral state, and the state moved clockwise is B ₂ , and the state moved counterclockwise is B ₃ .

And the operation lever 36 when in the stop position, that is, it is assumed that when in the neutral as C _1, and the movement state in the clockwise direction C ₂ d, and the movement in the counterclockwise direction condition C _3.

The regulating lever 42 is assumed to be D ₁ when it is in the stop position, and it is assumed that the state moved clockwise is D ₂ .

Finally, when the selector 44 is in the stop position, that is, when it is in the neutral position, it is referred to as E ₁ , the state shifted in the counterclockwise direction is called E ₂ , and the state shifted in the clockwise direction is assumed to be E ₃ . do.

1 is a diagram showing the state at the time of stop, and it will be apparent that each mode change is explained on the basis of the time at the stop.

First, in the stop state, the projection 30 formed on one side of the mode switching lever 28 is caught on the first catching jaw 27 of the outer circumferential cam 24 constituting the cam gear 21, and the cam gear 21 The second power transmission gear 17 is located at the first interval 47 portion of the interval portion where the rack 22 is not formed on the outer circumferential surface.

In addition, since one end of the elastic lever 48 rotatably installed on the main plate 1 is connected to the bottom cam 26, the cam gear 21 is intended to rotate clockwise (hereinafter referred to as "forward rotation"). I am receiving strength.

In addition, positions and associations in the stop state of all the components not described above will be omitted together in the description of the mode conversion.

When the play mode is selected in the stop state, the motor 6 is driven in the forward direction and power is supplied to the solenoid 7.

When the motor 6 is driven, this driving force is transmitted to the pair of capstans 9 and 9a and the auxiliary pulley 10 and the main pulley 12 by the belt 13 to the lower side of the fixing plate 3. The capstan 9 (9a) shaft and the fixed drive shaft (not shown) is rotated accordingly, the main gear 11 formed integrally below the main pulley 12 is rotated, wherein the main gear 11 The rotational force of) is transmitted to the upper driven gear 15 through the first power transmission gear 14 so that the upper driven gear 15 and the lower driven gear 16 rotate together with the upper driven gear 15. The second power transmission gear 17 meshed with also rotates.

When the driving force of the motor 6 is transmitted to the relay means and the power transmission means as described above, the solenoid 7 to which the power is applied pushes the other side of the mode switching lever 28 in the A ₁ position, and thus the mode switching lever It rotates in a clockwise direction about the hinge axis, wherein the projection 30 formed on one side of the mode switching lever 28 is separated from the first catching jaw 27 of the outer cam 24 so that the mode switching lever ( 28) is moved to the position of A ₂ .

In accordance with the detachment of the projection 30, the cam gear 21 is released to be rotatable state, wherein one end of the elastic lever 48 is rotated clockwise to push the bottom cam 26 and accordingly the cam As the gear 21 rotates slightly forward by a predetermined rotation speed, the rack 22 and the second power transmission gear 17 formed on the outer circumferential surface of the cam gear 21 are engaged.

Accordingly, the driving force of the motor 6 is transmitted to the cam gear 21 so that the cam 30 rotates forward and the projection 30 of the mode switching lever 28 is driven by the outer cam 24. Since the first inclined surface 49 is moved inward, the mode switching lever 28 moves back to the A ₁ position.

At this time, as the inner cam 25 formed on the plane of the cam gear 21 rotates, the lower protrusion 34 of the extension piece 35 formed integrally with the moving lever 31 is guided to the inner cam 25. The moving lever 31 moves clockwise from the neutral B ₁ position about the hinge axis to the B ₂ position. The moving lever 31 is formed on the moving plate 5 and fitted into the long hole 32 formed on one side of the moving lever 31. As the pins 4 are moved together, the moving plate 5 is moved to the right as a result.

When the movable plate 5 is moved, another pin 4a formed on the movable plate 5 is also moved, so that the torsion spring 37 is pushed to the right to elastically deform, and the pins 4 and 4a are fixed plates. Since it protrudes through the long hole (2) (2a) formed in (3), left and right movement is possible within the length of the long hole (2) (2a).

In the state where the torsion screw 37 is elastically deformed, the actuating lever 36 also receives a force to be moved clockwise at the position of C ₁ , but the other end of the actuating lever 36 is a locking groove of the regulating lever 42 ( Since it is inserted in 40), it cannot be rotated and remains elastic with a neutral state, that is, C ₁ .

The cam gear 21 is also rotated as the motor 6 continues, and the cam gear 21 is caught by the second catching jaw 27a of the outer circumference cam 24 by the projection 30 of the mode switching lever 28. ) Rotation stops and mode conversion to play is completed.

The rotation of the cam gear 21 is stopped by the second power transmission gear 17 and the cam gear 21 by the second gap 47a between the racks 22 formed on the outer circumferential surface of the outer cam 24. This is possible by shorting the rack 22.

Therefore, even if the second power transmission gear 17 is rotated, this rotational force is not transmitted to the cam gear 21, so that the cam gear 21 is not rotated.

In this way, when the moving lever 31 is moved in the clockwise direction, that is, the state is moved from B ₁ to B ₂ , the other side of the moving lever 31 is moved counterclockwise in the drawing about the hinge axis. Since the long hole 45 formed on the other side of the selection lever 44 is inserted into the upper protrusion 33 formed on the other side of the moving lever 31, one side of the selection lever 44 is also combined with the other side of the moving lever 31. It is moved counterclockwise on the drawing about the hinge axis.

Therefore, the selection lever 44 is moved from the position of E _{1 to} the position of E ₂ so that the movable gear 46, which is installed on the other side of the selection lever 44 and engaged with the lower driven gear 16, has a third driving force. It is also engaged with the transmission gear 20.

Therefore, the rotational force of the main gear 11 that is rotated when the driving force of the motor 6 is relayed by the relay means is the first power transmission gear 14 → the upper driven gear 15 → the lower driven gear 16 → the shifting gear. (46) → the third power transmission gear (20) → the first intermediate gear (19) is transmitted to the first reel gear (18), the first reel gear 18 is rotated forward and accordingly the right reel (not shown) Drive the tape as it rotates.

Such a state is shown in FIG. 2 of the accompanying drawings, in which the mode switching lever 28 is the first path (solid line state) 23a of the outer cam 24 formed on the cam gear 21 as shown in FIG. 8B. Guided along the second hanging jaw (27a) is hanging.

On the other hand, in the state in which the moving lever 31 is moved clockwise, that is, in the state of B ₂ , as described above, the moving plate 5 is moved to the right as described above. (Not shown) is rotated with the pinch roller by being fixed to the lower side of the one side capstan 9 and rotated by the pinch roller and the head (not shown) is operated to start play.

At the time of recording, the mode switching lever 28 is moved from the position A _{1 to} the position A ₂ by the momentary power supply of the solenoid, so that the rack 22 of the cam gear 21 transfers the second power. The cam gear 21 rotates forward while being engaged with the gear 17. At this time, the mode switching lever 28 is guided to the outer circumference cam 24 and then moved back to the A ₁ position by the first inclined surface 49. Is the same as when playing.

In this state, once the power is applied to the solenoid 7 once again, the mode switching lever 28 is moved to the position A ₂ as shown in FIG. 3A of the accompanying drawings, in which the rotation of the cam gear 21 continues. In accordance with the mode switching lever 28 starts receiving the guidance of the second inclined surface (19a) of the outer cam (24).

Looking at the position of each lever at this time, the mode switching lever 28 is in the position of A ₂ , the moving lever 31 is in the position of B ₂ , the operating lever 36 is left in the position of C ₁ .

And the control lever 42 is in the position of D ₁ in the state receiving the elasticity by the deformation of the torsion spring 37.

Subsequently, when the cam gear 21 rotates, the projection 30 of the mode switching lever 28 at the position A ₂ is further rotated clockwise about the hinge axis while being guided by the second inclined surface 49a. Since the mode switching lever 28 is moved from the position of A _{2 to} the position of A ₃ , the pressing piece 29 formed integrally with the mode switching lever 28 pushes the control lever 42 downward, thereby regulating the lever. 42 receives the elasticity of the spring 43 in the position of D ₁ and is moved to the position of D ₂ and at the same time the locking groove 40 formed in the regulating lever 28 is released from the other end of the operating lever 36 The actuating lever 36, which is forced to rotate clockwise by the torsion spring 37, is moved from the position of C _{1 to} the position of C ₂ .

When the actuating lever 36 is moved to the position of C ₂ , the actuating rod 38 of the switch 8 fitted into the groove 38 formed at one end of the actuating lever 36 is moved to the right together so that the switch 8 The mode is switched to enable recording.

When the cam gear 21 continues to rotate in this state, the projection 30 of the mode switching lever 28 passes the second slope 49a forming the outer cam 24 to guide the third slope 49b. receiving a first locking step (27a), so takes on the mode-switching lever 28 is a mode to a _3-recorded odd at the position beyond the position of a ₂ hameuroseo accompanying drawings, the movement in the a ₁ position as the 3b help of the transformation At this time, the mode switching lever 28 is guided along the second path (single-dotted line state) 23b of the outer circumference cam 24 formed on the cam gear 21 as shown in FIG. 8C. It is caught in 2 catching jaws 27a.

In addition, the control lever 42 receives the restoring force of the spring 43 while the mode switching lever 28 is moved from the position of A _{3 to} the position of A ₂ and at the same time the pressing force held by the pressing piece 29 is released. It is moved back to the position of D ₁ .

At this time, since the operating lever 36 is moved to the position of C ₂ as described above, the other end of the operating lever 36 is caught by the locking protrusion 41 of the regulating lever 42.

The power transmission during the recording is performed in the same manner as in the play, so that the first reel gear 18 is rotated forward and the reel rotates to drive the tape.

The mode change in reverse play may be performed immediately in the stop state, but also in the play and record states described above. In the stop state, the same operation as the play state is performed once, and then the operation to reverse play is continuously performed. Since the operation up to the play has already been described, it will be omitted and only the operation thereafter will be described in detail.

As shown in FIG. 3B, the projection 30 formed on the mode switching lever 28 is caught by the second catching jaw 27a of the outer cam 24, and power is momentarily applied to the solenoid 7 so that the mode switching lever 28 is provided. ) Is moved from the position of A _{1 to} the position of A ₂ , and at the same time, the elastic lever 48 slightly pushes the bottom cam 26 formed on the bottom of the cam gear 21 so that the rack of the cam gear 21 ( 22 and the second power transmission gear 17 are engaged with each other, and the cam gear 21 is rotated forward by the driving force of the motor 6.

When the cam gear 21 rotates, the projection 30 formed on the mode switching lever 28 is guided to the outer circumference cam 24 and then starts to move from the position of A _{2 to} the position of A ₃ by the fourth inclined surface 49c. At the same time, the pressing piece 29 formed integrally with the mode switching lever 28 pushes the regulating lever 42 to the position of D ₂ .

When the mode switching lever 28 is moved to the position of A ₃ by the fourth inclined surface 49c as shown in FIG. 4A, the control lever 42 receives the elasticity of the spring 43 and the position of D ₂ . The movement lever 36 is released by the restoring force of the torsion spring 37 while releasing the other side of the actuating lever 36 held by the catching groove 40 of the regulating lever 42 while releasing the movement. Is moved to the position of C ₂ and thereby moves the operating rod 39 of the switch 8 fitted in one groove 38 of the operating lever 36 to the right.

The continuous rotation of the cam gear 21 causes the projection 30 of the mode switching lever 28 to be guided by the fifth inclined surface 49d of the outer cam 24 and formed integrally with the moving lever 31. The downward projection 34 of the piece 35 is guided by the inner circumferential cam 25 and thus the moving lever 31 starts to move from the position of B _{2 to} the position of B ₁ and the mode switching lever 28 also. It starts to move from the position of A _{3 to} the position of A ₂ .

In this way, when the movement lever 31 is completed to move to the position of B ₁ , the moving plate 5 is also moved to the neutral position by the pin 4 fitted in one side hole 32 of the movement lever 31. Another pin 4a formed on the plate 5 is also moved to the neutral position by pushing the torsion spring 37, so that the operating lever 36 is moved back to the C ₁ state by the force of the torsion spring 37.

Therefore, the operating rod 39 of the switch 8 fitted in the groove 38 formed at one end of the operating lever 36 is moved from the right side to the neutral position.

Such a state is the same as FIG.

In addition, shift lever 31 is in the E ₁ to the state where the movement is completed to a position B ₁ shift lever 31. Select lever 16 is sandwiched between the long hole 45 at the other side upward projection 33 of the centered hinge axis And the driving force of the motor 6 is transferred to the first reel gear 18 because the moving gear 46 provided on the other side of the selection lever 16 is short-circuited with the third power transmission gear 20. Will not be delivered.

In the state where the mode switching lever 28 is located at A ₂ , since the pressing force of the regulating lever 42 is released, the regulating lever 42 is moved to the position of D ₁ by receiving the restoring force of the spring 43. An integrally formed locking groove 40 is fitted to the other end of the operation lever 36.

If the cam gear 21 continues to be diffracted, the projection 30 of the mode switching lever 28 is moved to the position of A ₁ by receiving the guide frame of the fifth inclined plane 49d of the outer cam 24 and then of the outer cap 24. The inner surface is guided and caught by the third catching jaw 47b.

On the other hand, while the mode switching lever 28 is guided to the inner surface of the outer cam 24 as described above, the projection 34 of the extension piece 35 formed integrally with the moving lever 31 is the inner cam ( Guided by 25), the moving lever 31 is moved from the position of B _{1 to} the position of B ₃ .

As the moving lever 31 is moved to the position of B _3, the pin 4 inserted into the long hole 32 formed at one side of the moving lever 31 formed on the moving plate 5 is pushed, and thus the pin 4 is moved. Since the moving plate 5 is moved to the left end of the long hole 2 formed in the fixed plate 3, the moving plate 5 is completed from the neutral to the left.

In addition, since the other pin 4a formed on the movable plate 5 is moved by pushing the torsion spring 37 to the left according to the movement of the movable plate 5, the operating lever 36 has elasticity. 36) is subjected to the force to be moved from the position of D _{1 to} the position of D ₃ by the elasticity, but the other end is not moved because it is fitted in the locking groove 40 of the control lever 42.

In this way, one end projection 30 of the mode switching lever 28 is caught by the third locking jaw 27b of the outer cam 24 and the rotation of the cam gear 21 is stopped, as shown in FIG. 4C. The mode conversion to reverse play is completed, and the mode switching lever 28 is guided along the first path 23a of the outer cam 24 formed on the cam gear 21 as shown in FIG. 8D. It is caught in the 3rd locking jaw 27b.

The rotation stop of the cam gear 21 is possible because the rotational force of the second power transmission gear 17 is not transmitted to the cam gear 21 by the third gap 47b between the racks 22 formed on the circumferential surface. Do.

In the reverse play state, the moving lever 31 is moved from the position of B _{2 to} the position of B ₃ as described above. In this case, the selection lever 44 is moved from the position of E _{1 to} the position of E ₃ . The moving gear 46 installed on the other side of the selection lever 44 is engaged with the second intermediate gear 19a, thereby integrally with the main pulley 12 when the power of the motor 6 is relayed by the relay means. The formed main gear 11 rotates and the rotational force is transmitted through the first power transmission gear 14 → the upper driven gear 15 → the lower driven gear 16 → the movable gear 46 → the second intermediate gear 19a. Power is transmitted to the second reel gear 18a so that the second reel gear 18 rotates in reverse, and thus the left reel (not shown) rotates to rotate the tape.

On the other hand, in the state where the moving lever 31 is moved to the left, that is, located in B ₃ , the left pinch roller (not shown) is fixed to the lower side of the other capstan 9a in the drawing as opposed to the previously described play. The pinch roller is also rotated and the head (not shown) is operated by connecting with the other driving shaft, and reverse play is started.

It has been previously found that the above described action is performed in the stop state or the play state.

In addition, reverse play may be started immediately in the record state. First, the positions of the levers in the record state will be recalled again, and then specific operations will be described.

As shown in FIG. 3B, the mode switching lever 28 is positioned at A ₁ , the movable lever 31 is positioned at B ₂ , the operating lever is positioned at C ₂ , and the regulating lever 42 is positioned at D _1. , Selector lever 16 is in the position of E ₂ .

In this state, when power is momentarily applied to the solenoid 7, the mode switching lever 28 is moved from the position of A _{1 to} the position of A ₂ and the cam gear 21 is rotated slightly forward so that the cam gear 21 is rotated. The rack 22 and the second power transmission gear 17 formed on the outer circumferential surface of the motor mesh with each other so that the cam gear 21 is rotated by the driving force of the motor 6.

The mode-switching lever 28 receives a fourth inclined surface (49c) guides the outer peripheral cam 24 formed on a plane of the integrated cam gear 21 that the projection 30 rotates is formed as in the A ₂ where A ₃ In this case, the control lever 42 is moved from the position of D _{1 to} the position of D ₂ by the pressing piece 29 formed integrally with the mode switching lever 28 and accordingly to the regulation lever 42. The locking projection 41 formed integrally releases the other end locking force of the operation lever 36 that has been moved to the position of C ₂ .

As the cam gear 21 continues, the projection 30 of the mode switching lever 28 is guided to the fifth inclined surface 49d of the outer circumference cam 24 and the moving lever 31 moves to the position of B ₁ . Thus, the operating lever 36 is also moved to the position of C ₁ .

On the other hand, the mode switching lever 28 is also moved to the position of A ₂ by the projection 30 guided by the fifth inclined surface 49d, and accordingly, the pressing force is released to move the regulating lever 42 to the position of D ₁ . Therefore, the engaging groove 40 formed in the regulating lever 42 is fitted to the other end of the operating lever 36.

The following operation is omitted since it is the same as the operation from the stop state and the play state to the reverse play state described above.

And the mode conversion to the reverse record is usually made in the stop state, but need not be limited to this can also be made in the play state or the record state, the projection 30 of the mode switching lever 28 is the outer cam 24 Up to a state completely out of the fifth inclined surface 49d, the operation is omitted since the operation is the same as in reverse play.

The following operation will be described in detail.

When the solenoid 7 is momentarily supplied with power, the mode switching lever 28 is moved from the position of A _{1 to} the position of A ₂ as shown in FIG. The projection 30 of the mode switching lever 28 is guided along the sixth inclined surface 49e so that the mode switching lever 28 moves to the position of A ₃ , and the pressing piece 29 moves the regulating lever 42. It is pushed downward, and accordingly the control lever 42 is moved to the position of D ₂ while receiving the elasticity of the spring 43.

Therefore, the locking groove 40 formed in the regulating lever 42 is removed from the other end of the operating lever 28.

At the same time, since the downward protrusion 34 of the extension piece 35 formed integrally with the moving lever 31 is guided by the inner circumferential cam 25, the moving lever 31 moves to the position of B ₃ about the hinge axis. As a result, as the movable plate 5 moves to the left in the drawing, the operating lever 36 is also moved to C ₃ .

Therefore, the operating rod 39 of the switch 8 fitted into the groove 38 formed on one side of the operating lever 36 is moved from the neutral to the left side so that reverse recording is possible.

The continuous rotation of the cam gear 21 causes the projection 30 of the mode switching lever 28 to be guided by the seventh slope 49f through the sixth slope 49e of the outer circumference cam 24, in which case the mode The switching lever 28 is moved from the position of A _{3 to} the position of A ₂ and the regulating lever 42 is moved to the position of D ₁ by the restoring force of the spring 43.

The mode switching lever 28 is moved in the position of A ₂ completely out of the seventh inclined surface 49f, and then caught in the third locking jaw 27b of the outer circumferential cam 24, as shown in FIG. 5B. As shown in FIG. 8E, the mode switching lever 28 is along the second path 23b of the outer cam 24 formed on the cam gear 21 as shown in FIG. 8E. The guide is hung on the third catching jaw 27b.

On the other hand, each of the lever position is the state that only the mode switching lever 28 is moved to the position of A ₁ , the rest is the same as the reverse play state, the power transmission is also made the same as the reverse play state, the second reel gear (18a) Rotates reversely and the other reel rotates to drive the tape in the reverse direction.

Finally, the mode transition from the reverse play state to the reverse record state to the stop state will be described.

First, when the mode change from the reverse play state to the stop state is momentarily supplied to the solenoid 7, the mode switching lever 28 moves from the position of A _{1 to} the position of A ₂ and at the same time the rack of the cam gear 21 The 22 and the second power transmission gear 17 are connected to each other, and the cam gear 21 is rotated forward by the power of the motor 6.

When the cam gear 21 is rotated forward by a predetermined rotation speed, the downward protrusion 34 of the extension piece 35 integrally formed on the moving lever 31 is guided by the internal cam 25 to move the moving lever 31. Is moved from the position of B _{3 to} the position of B ₁ , whereby the pin 4 fitted in one of the long holes 32 of the moving lever 31 is moved to the neutral position in the long hole 2 formed in the fixing plate 3. Therefore, the movable plate 5 is also moved to the neutral position and another pin 4a formed on the movable plate 5 is also moved to the neutral position, so that the elasticity of the torsion spring 37, which has been elastically deformed to the left side, falls.

Since the projection 30 of the mode switching lever 28 is guided to the eighth inclined surface 49g of the outer cam 24 by the continuous rotation of the cam gear 21, the mode switching lever 28 is positioned at A ₂ . Since the pressing piece 29 formed integrally with the mode switching lever 28 and thus pushes the regulating lever 42 in the position of A ₃ , the regulating lever 42 receives elasticity of the spring 43. _It is moved from the position of _{1 to} the position of D ₂ .

Subsequently, the projection 30 of the mode switching lever 28 receives the guidance of the eighth slope 49g of the outer cam 24 and subsequently receives the guidance of the ninth slope 49h. The projection 30 Is guided to the ninth slope 49h, the mode switching lever 28 is moved from the position of A _{3 to} the position of A ₂ .

Therefore, the control lever 42, which has been moved to the position of D ₂ by the pressing piece 29, is moved back to the position of D ₁ under the restoring force of the spring 43, and accordingly, the locking groove 40 formed in the regulation lever 42 is formed. ) Is fitted to the other end of the operating lever 36 in the position of C ₁ .

In this state, since the cam gear 21 continues to rotate, the projection 30 of the mode switching lever 28 receives the complete guidance of the ninth slope 49h, and then the first locking jaw 27 as in the first stop state. As shown in FIG. 1, the mode switching lever 28 is in the position of A ₁ , the moving lever 31 is in the position of B ₁ , and the regulating lever 42 is in the position of D ₁ . .

The actuating lever 36 is also at the position C ₁ , and the selector 44 is at the position E ₁ .

On the other hand, as described above, when the mode change from the reverse record state to the stop state is explained, when the solenoid 7 is momentarily supplied with power, the mode switching lever 42 moves from the position of A _{1 to} the position of A ₂ . After the movement of the cam gear 21, the outer cam 24 is guided. At this time, the projection 30 of the mode switching lever 28 is guided to the eighth slope 49g of the outer cam 24. Therefore, the mode switching lever 28 is moved to the position of A ₃ and at the same time the moving lever 31 is moved to the position of B ₁ , so the moving plate 5 is also moved to neutral.

The operation lever 36 by the movement batjiman a force trying to be moved from the C ₃ position by an elastic force of tosyon spring 37 in a C ₁ position regulating lever 42 of the shift lever 31 is in D ₁ Since the operating lever 36 is hung on the end of the regulating lever 42 as it is, it cannot be moved, but the position shift of the mode switching lever 28 is completed at A ₃ , and at the same time, the mode switching lever 28 Since the integrally formed pressing piece 29 pushes the regulating lever 42 apart, the locking force is released and the operating lever 36 moves from the position of C _{3 to} the position of C ₂ by the restoring force of the torsion spring 37 accordingly. As a result, the groove 38 formed at one end of the actuating lever 36 moves the actuating rod 39 of the switch 8 to neutral to release the reverse record.

The projection 30 of the mode switching lever 28 is guided to the ninth inclined surface 49h of the outer circumference cam 24 by the continuous rotation of the cam gear 21, so that the mode switching lever 28 is located at the position of A ₃ . The control lever 42 is moved from the position of D _{2 to} the position of D ₁ by receiving the restoring force of the spring 43 while being released to the position of A ₂ and the pressing force of the regulation lever 42 is released. The engaging groove 40 formed at the end of the 42 is fitted to the other end of the operating lever 36.

All operations until the following stop state is the same as the operation from the reverse play state to the stop state described above, and the operation path is as shown in FIG. 8F of the accompanying drawings.

Therefore, it is possible to use only one cam gear and solenoid used for mode conversion, thereby reducing the accompanying components, and thus miniaturizing and thinning the device.

Claims (13)

The fixed plate 3 having a pair of long holes 2 and 2a fixed to the main plate 1 at fixed intervals, and a pair of pins 4 and 4a integrally formed on the fixed plate 3. It is installed on the main plate (1) and the fixed plate (3) and the movable plate (5) installed so as to be protruded through the formed long hole (2) (2a) so as to be movable between the fixed plate (3) and the main plate (1). Relay means for relaying the power generated by the motor 6 within a predetermined section, power transmission means for receiving and transmitting power relayed by the relay means, and installed on the fixed plate 3 by the power transmission means. Cam assembly that rotates selectively by the transmitted power, the mode switching means is installed on the main plate (1) to switch modes according to the operation of the solenoid (7), and the cam is installed on the main plate (1) When the moving plate 5 moves left and right according to the rotation of the assembly Moving means to be resilient, actuating means elastically installed on the fixed plate 3 to selectively operate this simultaneous switch 8 of the moving plate 5, and elastically installed on the main plate 1 Regulating means for regulating the rotation of the operating means according to the rotation of the mode conversion means, and installed on the main plate (1), so that the play and record, reverse play and reverse record is started in accordance with the rotation of the moving means The apparatus for mode conversion of a cassette tape recorder, characterized in that it comprises a selection means for enabling to deliver the selection. When the stop, play, record, reverse play, reverse record is selected, each of the engaging jaw (27) through the path to one of the first path (23a) and the second path (23b) formed on the outer cam (24) of the mode switching means Mode conversion method of the cassette tape recorder, characterized in that the mode change is made according to the (27a) (27b) selectively. The method of claim 1, wherein the relay means is provided with a capstan (9) (9a) to be rotatable on the fixed plate (3) and the auxiliary pulley (10) and the main gear (11) on the main plate (1) By installing the main pulley 12 formed integrally connected to the belt 13 so that the capstan (9) (9a), the auxiliary pulley (10), the main gear 11 can be rotated in accordance with the drive of the motor (6) Mode conversion device for cassette tape recorders. According to claim 1, wherein the power transmission means is installed on the main plate 1 and the first power transmission gear 14 for transmitting the rotational force of the main gear 11 and the first power transmission gear meshed with the first power transmission gear to rotate together An upper driven gear 15 and a lower driven gear 16, a second power transmission gear 17 engaged with the upper driven gear 15 to rotate together, and a reel for driving the tape; The first intermediate gear 19 and the second intermediate gear 19a meshed with the first reel gear 18 and the second reel gear 18a, the reel gears 18 and 18a, and the first intermediate gear 19. A mode conversion apparatus for a cassette tape recorder composed of a third power transmission gear (20) connected thereto. The cam assembly according to claim 1, wherein the cam assembly is formed by a plurality of protruding pieces 23 on the outer side of the plane of the cam gear 21 on which the racks 22 are formed at regular intervals on the outer circumferential surface thereof. An outer circumferential cam 24 having a second path 23b, an inner circumferential cam 25 formed in the plane inside of the cam gear 21, and a bottom cam 26 formed on the bottom surface of the cam gear 21; And a mode conversion device for a cassette tape recorder configured to selectively move the mode switching means and the moving means during rotation. The mode switching means (28) according to claim 1, wherein the mode switching means (28) and the mode switching lever (28) to switch modes according to the operation of the solenoid (7) and the mode switching lever are integrally formed to move the regulating means. And a pressing piece (29) and a projection (30) formed on one side of the mode switching lever (28) and connected to guide the outer cam (24). According to claim 1, The moving means is formed with a long hole (32) on one side of the moving lever 31 and the upper projection 33 on the other side so that the long hole 32 is formed on the moving plate (5) 4) and the cassette tape connected to the moving lever 31 to integrally form the extension piece 35 having the downward protrusion 34 so that the downward protrusion 34 is guided to the inner circumferential cam 25. Recorder mode converter. According to claim 1, The operating means is elastically installed to the torsion spring 37, the operating lever 36, the groove 38 is formed at one end and the elasticity of the torsion spring 37 is fixed to the moving plate (5) A mode converting apparatus of a cassette tape recorder which is configured to selectively regulate rotation by a regulating means when the other pin (4a) is moved. The method of claim 1, wherein the restricting means is a spring (43) is hinged on the same axis as the mode switching lever 28, the control lever 42 formed integrally with the locking groove 40 and the locking projection 41 at the end; Mode converter for elastically mounted cassette tape recorders. According to claim 1, wherein the selection means is formed in the long hole 45 on one side of the selection lever 44 coupled to the lower driven gear 16 in the same axis, the upper projection is formed on the other side of the moving lever 31 The moving gear 46 is installed on the other side of the selection lever 44 so as to be engaged with the lower driven gear 16 on the other side of the selection lever 44. A mode conversion apparatus for a cassette tape recorder adapted to be selectively engaged with a transmission gear (17) and a second intermediate gear (19a). The method of claim 5, wherein the outer circumferential cam 24 is formed by the engaging jaw (27, 27a, 27b) as the cam lever 21 rotates as the mode switching lever 28 is caught by the locking jaw A mode changer for cassette tape recorders that is in stop, play and record and reverse play and reverse record states. The method according to claim 8, wherein one groove 38 of the actuating lever 36 allows the actuating rod 39 of the switch 8 to be fitted so as to switch each mode according to the left and right movement of the actuating lever 36. Mode conversion apparatus of a cassette tape recorder to achieve a. The method of claim 2, wherein the mode switching lever 28 is guided to the first path (23a) by the first inclined surface 49 formed on the outer cam 24, the play according to the second locking jaw (27a) A step of selecting a mode, and the mode switching lever 28 is formed on the second path 23b by the first inclined plane 49, the second inclined plane 49a, and the third inclined plane 49b formed on the outer circumferential cam 24. The step of selecting the record mode according to the guided second engaging jaw (27a) and the fourth inclined surface 49c and the fifth inclined surface 49a in which the mode switching lever 28 is formed on the outer circumferential cam 24. The step of selecting the reverse play mode by being guided to the first path (23a) and then caught by the third engaging jaw (27b), and the fourth inclined surface (28) formed on the outer cam (24) mode switching lever (28) 49c) is guided to the second path 23b by the fifth inclined plane 49d and the sixth inclined plane e and the seventh inclined plane 49f, and then the reverse record mode in accordance with the third engaging jaw 27b. In step to select Eojin cassette tape recorder mode conversion method in order.