JPH0576709B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tape fast forward lock mechanism for a cassette tape recorder.

Background Art During normal play, a cassette tape recorder presses a magnetic head against a magnetic tape to reproduce music information recorded on the magnetic tape, and also moves the magnetic head away from the magnetic tape when fast forwarding or rewinding the tape. Separated or slightly touching. If an electromagnetic solenoid is used to move the magnetic head forward (movement toward the magnetic tape is defined as forward movement), the electromagnetic solenoid is deenergized when the tape is fast forwarded or rewound to move the magnetic head forward. It is necessary to release the force, and this deactivation of the electromagnetic solenoid is advantageously carried out in conjunction with the actuation of a fast forward or rewind lever.

On the other hand, conventionally, the fast forward lever and the rewind lever have been constructed as independent levers, and when operated, the lock portions provided on each lever individually engage with lock cams to lock each lever.

Therefore, the conventional fast-forward and rewind levers each have an operating section and a locking section, which are disadvantageous in that they are not suitable for miniaturization.

Purpose An object of the present invention is to provide a tape fast forward locking mechanism in which the operating section and the locking section are separated.

The present invention comprises a fast-forwarding lever 13, a rewinding lever 14, a lock lever 190 having one end abutting the fast-forwarding lever and the rewinding lever and having an engaging protrusion 202 at the other end; A lock cam 191 that displaces in response to the displacement and has an engagement hole 196 into which the engagement protrusion engages, a head stand 12 on which the magnetic head 12a is mounted, and an electromagnetic solenoid 23 that applies forward force to the head stand. and a leaf switch 226 for turning on and off the electromagnetic solenoid, and during fast forwarding or rewinding, by pushing the fast forwarding lever or the rewinding lever, the locking lever is displaced in the pushing direction, and the locking lever is moved in the pushing direction. The leaf switch is held by a lock cam, and the leaf switch is shut off by the movement of the lock cam accompanying the displacement of the lock lever, and the electromagnetic solenoid is deenergized to release the forward force on the head stand. This is a tape fast forward lock mechanism.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a simplified perspective view of a car stereo radio equipped with a cassette tape recorder and/or player in which the present invention is implemented. A cassette insertion slot 2 for inserting a cassette tape is provided above the scale plate 1 of the radio, and push buttons 3 for a tape rewind lever and a fast forward lever are located on the right side of this cassette insertion slot 2. ，
4 are sequentially provided, and an eject lever push button 5 is provided on the left side.

2 is a simplified plan view of a cassette tape recorder and/or player in which the present invention is implemented, FIG. 3 is a rear view as seen from the side indicated by arrow A in FIG. 2, and FIG. is a side view seen from the arrow B side in Figure 2, Figure 5 is a side view seen from the arrow C side in Figure 2, and Figure 6 is a bottom view seen from the arrow D side. It is. Referring to these drawings, first
In the figure, a cassette storage section 11 is supported on a side plate portion 10a on the left side of the substrate 10 so as to be movable up and down with respect to the substrate 10. A head stand 12 and a head 12a fixed to the head stand 12 are disposed on the right side of the cassette storage part 11, and the head stand 12 is configured to be able to move forward and backward toward the cassette storage part 11. A fast forward lever 13 for fast forwarding the tape and a rewind lever 14 for rewinding the tape are provided above the head stand 12. A discharge lever 15 is provided on the outside of the side plate portion 10a of the substrate 10, and the tip portion 15a of the discharge lever 15 is inserted through a long hole 16 formed in the side plate portion 10a and projects inward. A protrusion 17 is formed. When the cassette is inserted through the cassette insertion slot 2 and is moving inside the cassette storage section 11, the tip of the cassette touches the protrusion 17.
When the cassette is further pushed in, the cassette storage section 11 is lowered toward the substrate 10 by a loading mechanism comprising an ejection lever 15, an ejector lever 20, etc., which will be described later. When the cassette completely falls, the trigger lever 21 is displaced downward in FIG. 4, allowing the ejector lever 20 to move to the right, which causes the lever 115 to rotate to the left and the leaf switch 22a to switch. The state is turned on (see FIG. 12), the electromagnetic solenoid 23 is excited, and the plunger 24 is retracted. When the plunger 24 is retracted, the head stand 12 moves toward the cassette to a predetermined position, and is in a playing state.

7 is a front view of FIG. 2 with the cassette storage section 11 removed, and FIG. 8 is a view of FIG. 2 with the board 10 removed. A motor 30 is provided on the board 10 . A pulley 31 is fixed to the output shaft of the motor 30. An endless belt 33 is passed around the pulley 31 and the flywheel 32, and the flywheel 32 is rotationally driven by the endless belt 33. A portion of the belt 33 is also in contact with the flywheel 34, thereby causing the flywheel 3
4 is also rotationally driven. A gear 36 is fixed to the rotating shaft of the flywheel 32.
A gear 37 is meshed with 6. A gear 35 fixed to the rotating shaft of the flywheel 34 can also mesh with the gear 37. Gear 37 is commonly meshed with gears 38 and 40. A gear 39 is fixed to the gear 38 at a position above the substrate 1. Also gear 40
A gear 41 is fixed to , and the gear 41 meshes with a partially toothed gear 42 . Gear 38 can mesh with gear 44, and gear 39 can mesh with gear 45. When the motor 30 is being driven,
Pulley 31, flywheels 32, 34, gear 3
7, 38, 39, 40, and 41 are constantly driven to rotate as shown by arrows.

The gear 44 is provided on a rotating shaft 46 for forward winding which is inserted into one reel of the cassette. A gear 48 is provided on a rotating shaft 47 for winding in the opposite direction, which is inserted into the other reel of the cassette. As shown in FIG. 7, the gears 38 and 39 are rotatably supported by a switching piece 50 for unwinding or winding, and this switching piece 50 is rotatable around the axis of the pin 51 by a pin 51. Supported by One end of the switching piece 50 is loosely fitted into a fitting hole 52 formed in the side plate portion 10a of the substrate 10, and the fitting hole 52 limits the angular displacement of the switching piece 50 to a certain amount. When the switching piece 50 is angularly displaced to the maximum in the clockwise direction, the gear 39 meshes with the gear 44, and when the switching piece 50 is angularly displaced to the maximum in the counterclockwise direction, the gear 39 meshes with the gear 44.
meshes with the gear 45. In the performance or recording state, the gear 39 is engaged with the gear 44 by the switching piece 50, and the rotational driving force from the pulley 31 is transmitted to the gear 44 via the flywheels 32, 34 and gears 37, 38, 39. be done.

In the fast-forwarding state, the rotating system remains as it is, and the head stand retreats, as will be described later, so that the frictional load between the head stand 12 and the pinch rollers 56, 60 is removed. Therefore, the gear 38 during performance
The number of rotations is the same during rapid forwarding, and the difference from the number of rotations for winding is absorbed by the friction load.

A detection means 53 is provided on the upper surface of the gear 38 to count the amount of tape travel.
A pulse signal corresponding to the rotation of 8 is sent out, thereby displaying a count number corresponding to the amount of tape travel on the display.

A capstan 55 is provided coaxially with the flywheel 32. A pinch roller 56 is provided in pressure contact with the capstan 55. The pinch roller 56 is rotatably held by a pinch roller holding member 57, and the pinch roller holding member 57 is rotatable about a support shaft 58 protruding from the substrate 10. Such a configuration includes the other flywheel 34, capstan 59, pinch roller 60,
The same applies to the pinch roller holding member 61 and the support shaft 62.

FIG. 9 is a perspective view of the vicinity of the side plate portion 10a before the cassette is inserted, FIG. 10 is an exploded perspective view of FIG. 9, and FIG. 11 is a perspective view of the side plate portion 10a after the cassette is inserted.
It is a perspective view of the vicinity. An ejection lever 15 is provided on the outside of the side plate portion 10a of the board 10 in the cassette insertion direction F.
It can be mounted movably along the An ejection lever 20 is attached to the side plate portion 10a below the ejection lever 15 so as to be movable along the cassette insertion direction F. Spring 82 on the eject lever 20
One end of the spring 82 is fixed, and the other end of the spring 82 is fixed to the base plate 10, so that the ejector lever 20
is biased by a spring 82 in a direction opposite to the cassette insertion direction F. A second lift lever 84 is disposed on the outside of the eject lever 20 and engages with an outwardly protruding engagement protrusion 83 provided at the rear end of the eject lever 20. Second lift lever 84
A substantially U-shaped engagement portion 84a is formed at the upper end, and when this engagement portion 84a engages with the engagement protrusion 83, displacement of the eject lever 81 in the left-right direction is prevented. thwarted. The second lift lever 84 is rotatably supported by a pin 86 at the rear end of a first lift lever 85 which is disposed below the eject lever 15 and outside the eject lever. The angular displacement of the second lift lever 84 is limited within the range in which the pin 87 protruding from the inner surface of the second lift lever 84 is guided into a guide hole 88 formed in the eject lever 20. A connecting portion 20 extending horizontally below the tip of the eject lever
A is provided. This connecting portion 20a is used to bring into conduction a leaf switch 23a for exciting an electromagnetic solenoid 23, which will be described later.
The first lift lever 85 is connected to the ejection lever 15 by a spring 91, and is also connected to the side plate portion 10a by a spring 92. Therefore, the second lift lever 92 is moved in the cassette insertion direction F.
is spring biased.

A protrusion 17 is formed at the left end of the ejection lever 15 in FIG. 4 and is perpendicular to the ejection lever 15 and projects inward. A guide hole 16 is formed in the side plate portion 10a along its longitudinal direction, and a protrusion 17 is fitted into the guide hole 16 to such an extent that a portion of the protrusion 17 protrudes into the cassette storage portion 11. A guide hole 95 is formed at the rear side along the longitudinal direction of the side plate portion 1, and the ejection lever 80 is inserted through the guide hole 95 and moved in the left-right direction in FIG. 4 by means of a pin 96.
Attached to 0a.

A restraining plate 100 is disposed outside the cassette storage section 11 for pushing the cassette storage section downward. This restraining plate 100 includes a flat plate portion 100a parallel to the substrate 10, and an arm portion 100b extending perpendicularly from the flat plate portion 100a. Holding board 10
0, as shown in FIG.
The arm portion 100b is pivotally supported by a pin to one end of the holding member 101 that holds the arm portion 100b, and one end portion of the arm portion 100b is pivotally supported to the side plate portion 10a by a pin. Therefore, the restraining plate 100 is rotatably supported. One end of the arm portion 100b is pin-coupled to the left end of the lever 85 in FIG. The side plate portion 10a is formed with an opening 102 into which one end of the restraining plate 100 is locked when the restraining plate 100 is angularly displaced clockwise. Also, the arm portion 1 of the holding plate 100
00b is provided with a protrusion 103 at a position corresponding to the opening 102, which abuts against the upper end surface 15a of the ejection lever 15 before inserting the cassette, and prevents the holding plate 100 from closing the cassette storage section 11.
limits the descent.

FIG. 12 is a perspective view showing the structure related to the eject lever 20 and the trigger lever 21. A connecting portion 20a extending in the horizontal direction is provided protruding from the lower end surface of the left end of the eject lever 20. This connecting portion 20a is arranged below the substrate 10. A projection 112 is erected on the upper surface of the connecting portion 20a, and the projection 112 passes through a guide hole 80 formed in the cam plate 113 from below to above. The cam plate 113 is rotatably attached to the base plate 10 by a pin 114. Cam plate 11
A contact portion 115 is provided upright at the left end of the electromagnetic solenoid 23, and the contact portion 115 can contact the movable piece 117 of the leaf switch 22a of the electromagnetic solenoid 23. The leaf switch 22a includes a movable piece 117 and a fixed piece 118, and the contact portion 115 presses the movable piece 117 before the cassette is inserted.
Therefore, the movable piece 117 and the fixed piece 118 are separated from each other.

Next, the operating state when the cassette is inserted will be explained. When the cassette is pushed into the cassette storage section 11, the upper end along the cassette insertion direction F comes into contact with the protrusion 17 during the insertion of the cassette, and when the cassette is further inserted, it moves in conjunction with the movement of the cassette. As a result, the projection 17 is pushed in, and the ejection lever 15 is pushed all the way in. When the ejection lever 15 reaches its depth, the support shaft 103 that had previously prevented the holding plate 100 from falling comes off the upper end surface 15a of the ejection lever 15, as shown in FIG. The holding portion 10 of the holding plate 100 is rotated clockwise by the spring force, and as a result, the holding portion 10 of the holding plate 100
0a presses the cassette storage section 11 downward, so that the cassette storage section 11 descends.

When the cassette is inserted and lowered as described above, the cassette presses the trigger lever 21 and forces it downward. When the cassette is completely lowered, the trigger lever 21 moves to the ejector lever 20.
completely escapes from the opening 81b, and therefore displacement of the eject lever 20 to the right is permitted.

When the holding plate 100 rotates around an axis perpendicular to the insertion direction F as shown in FIG. moved along. Therefore, the pin 86 is attached to the first lift lever 85.
The second lift lever 84 fixed by is rotated clockwise. By rotating the second lift lever 84, the second lift lever 84
The locked state between the second locking protrusion 84b and the locking piece 83 of the eject lever 20 is released. Furthermore, as described above, the downward movement of the trigger lever 21 allows the rightward displacement of the ejector lever 20, so the ejector lever 20 moves rightward.

When the ejector lever 20 moves to the right, the connecting portion 2 formed at the end of the ejector lever 20
0a also moves to the right, thus connecting the connecting part 113 via the protrusion 112 displaced along the guide hole 80.
is rotated around the pin 114 in the counterclockwise direction in FIG. 12, and the contact portion 118 is separated from the movable piece 170
The movable piece 170 and the fixed piece 118 come into contact, and the leaf switch 22a is turned on. When the leaf switch 22a turns on, the electromagnetic solenoid 2
3 is excited and the plunger 24 is retracted. As a result, the head stand 12 advances toward the cassette and is pressed against the capstan via the tape, and the tape is run at a constant speed to perform tape performance.

Next, the operating state when the cassette is ejected will be explained. When the ejector lever 20 is pushed in along the cassette insertion direction F, the cam plate 113 is moved to the first position by the pushing operation of the ejector lever 20.
2, the leaf switch 22a is turned off, the plunger 24 is extended, and as a result, the head stand 12 is retreated in the direction in which it is separated from the cassette. Next, the locking piece 83 of the eject lever 20 presses the first locking protrusion 84a of the second lift lever 84, so that the second lift lever 84 is rotated counterclockwise. In accordance with this rotational movement of the second lift lever 84, the first lift lever 85 is moved to the right against the spring force of the spring 92.

When the first lift lever 85 moves to the right, the holding plate 100 connected to one end of the first lift lever 85 is rotated counterclockwise around the axis of the pin 100c, and the projection 103 of the holding plate 100 is rotated counterclockwise around the axis of the pin 100c. When the ejection lever 15 slides onto the rear end surface and is angularly displaced to the position where it separates from the rear end surface, the ejection lever 1
5 is allowed to move to the right, and is moved to the right by the spring force of the spring 82. This rightward movement of the ejection lever 15 is performed while the outer periphery of the protrusion 103 and the upper end surface 15a of the ejection lever 15 are in sliding contact, as described above. When the ejection lever 15 moves to the right, the cassette is ejected from the cassette storage section 11 by being pushed out by the protrusion 17 accordingly.

After the second lift lever 84 is rotated and angularly displaced until its longitudinal direction becomes perpendicular to the board 1, the second locking protrusion 84b engages the locking piece 83.
come into contact with each other, and the ejector lever 20 is engaged and in a locked state. Also, as the cassette rises upwards on the board 10, the head trigger lever 21 fits into the opening 81b of the ejector lever 20,
The ejector lever 20 becomes locked. Therefore, the ejector lever 20 is prevented from protruding greatly during non-performance.

13 is a sectional view taken from the cutting plane line - of FIG. 4, FIG. 14 is a sectional view taken from the cutting plane line - of FIG. 4, and FIG. 15 is a sectional view taken from the cutting plane line -
It is a sectional view seen from the cutting plane line - of the figure.
In FIG. 13, a projection 17 made of a synthetic resin material is fixed to the ejection lever 15 by a support shaft 120. As shown in FIG. The right end of the support shaft 120 is an E-ring 121
Fixed by A roller 1 is provided around the support shaft 210 in a portion of the support shaft 120 corresponding to the guide hole 16.
22 is attached. The outer periphery of this roller 122 is in contact with the guide hole 16. Also, the roller 122 is the spindle 1
It is rotatable relative to 20 degrees. Therefore, protrusion 1
When the roller 7 moves, the roller 122 moves while rotating along the guide hole 16, so that the protrusion 17 can be moved with a relatively small load.

In FIG. 14, the roller 1 is shown surrounding the pin 96.
22b is rotatably mounted around the outer periphery of the pin 96. The pin 96 is fixed to the side plate portion 10a. The shaft portion of the roller 122b is in contact with the inner wall of the guide hole 95 of the ejection lever 15, so when the ejection lever 15 moves via the pin 96, the guide hole 9
The roller 122b in contact with the roller 5 performs a rotational movement. Therefore, the frictional force between the guide hole 95 and the roller 122b is small, and therefore the operating force for moving the ejection lever 15 can be made relatively small.

Furthermore, in FIG. 15, a roller 122c is rotatably mounted surrounding the support shaft 103. This roller 122c is in contact with the upper end surface 15a of the ejection lever 15 before the cassette is inserted, and when the ejection lever 15 moves as the cassette is inserted, the roller 122c rotates. Therefore, only a relatively small frictional force is generated between the upper end surface 15a of the ejection lever 15 and the roller 122c, and therefore the ejection lever 80 can be moved with a small operating force.

By attaching the rollers to the straight-travel portion of the movable body in this manner, the frictional force and the operating force can be reduced. Further, as will be described later, the second lift lever 84 is rotated by the ejector lever 20, and the roller 12 between the lever 15 and the restraining plate 100 is rotated.
It is configured to reduce the frictional force with 2c. Therefore, in a mechanism that has many linear sliding parts and therefore large friction loss, the present invention incorporates a rotating structure with low friction loss and rolling motion using rollers, thereby reducing the operating force and improving the operating feeling. be able to.

Figure 16 shows the head stand 1 before inserting the cassette.
FIG. 17 is a simplified plan view showing the structure related to the head stand 12 after loading the cassette, and FIG. 18 is a simplified plan view showing the structure related to the head stand 12 after loading the cassette. 60 and a perspective view of the vicinity of the head stand 12, and FIG.
6 is a rear view seen from the arrow L side in FIG. 6. FIG. A long hole 150 is formed in the support member 61 of the pinch roller 60, and a similar long hole 151 is also formed in the support member 57 of the other pinch roller 56. A torsion spring 152 is fixed on the head stand 12 above the head 12a, one end of this torsion spring 152 is engaged with the elongated hole 150, and the other end is engaged with the elongated hole 151. Also, the torsion spring 152
is the locking protrusion 15 provided on the head stand 12.
No. 3,154.

A connecting member 160 is disposed below the head stand 12 for moving the head stand 12 forward or backward in accordance with the operating state of the plunger 24.
An upright portion 161 is provided at one end of the connecting member 160, and this upright portion 161 fits between the hanging member 159 extending downward at the tip of the plunger 24 and the widened portion 24a of the plunger 24. It's crowded.
The connecting member 160 is fixed to the head stand 12 by a pin 162 at the end opposite to the end where the upright portion 161 is provided.

Long holes 163 and 164 extending in the vertical direction as shown in FIG. 16 are formed in the lower part of the head stand, and the substrate 1
Pins 165 and 166 fixed on the top of the slot 16 are inserted through the elongated holes 163 and 164, respectively.
Furthermore, in the case of the pin 165, the connecting member 160 is also inserted therethrough. Therefore, the connecting member 160 is rotatable around the axis of the pin 165.

Springs 167 and 168 are installed on both sides of the head stand 12.
One end of the springs 167 and 168 are connected, and the other ends of the springs 167 and 168 are connected to the substrate 10. Therefore, the head stand 12 is always urged upward by springs 167 and 168.

When the electromagnetic solenoid 23 is energized, the plunger 24 is retracted as shown in FIG. Ru. Therefore, the head stand 12 has pins 163 and 164.
It is guided through long holes 165 and 166 and moves downward. When the head stand 12 moves downward, the support members 57, 61 and the pinch rollers 56, 60 are also moved to the arrow 155 via the torsion spring 152.
direction and move downward. pinch roller 5
6 and 60 are moved through the tape until they are pressed onto the capstan. As a result, the tape runs at a constant speed and tape performance is performed.

At the time of ejection, the electromagnetic solenoid 23 is demagnetized and the plunger is extended, whereby the connecting member 160 is rotated counterclockwise around the pin 163. Therefore, the head stand 12 moves upward, the torsion spring 152 also moves upward by the locking protrusions 153 and 154, and the pinch roller 5
6 and 60 rotate in the opposite direction to the arrow 155 and move upward, completely separating from the capstan. The head 12a also completely separates from the tape.

At the lower right side of the head stand 12 in FIG. 16, a lever 180 for finding the beginning of a song is arranged. This lever 18
0 is rotatably supported on the substrate 10 by a pin 185. Portions 180a, 180 of lever 180
b, and is roughly L-shaped. part 1
A locking part 181 is provided at the end of the head 80a, and is arranged on the lower surface of the head stand 12. This locking part 181
can be locked with a pin 182 fixed to the head stand. The end of the portion 180b is the ejector lever 8.
It can be fitted into a fitting hole 183 formed in 1. A torsion spring 1 is attached to the pin 185 of the lever 180.
86 is attached, one end thereof is engaged with the portion 180b, and the other end thereof is engaged with the side plate portion 10a.

FIG. 20 is a diagram for explaining the operating state of the song cue lever 180. Before the cassette is inserted, the side surface of the locking portion 181 of the lever 180 is in contact with the pin 182, as shown in FIG. 20. When the cassette is inserted and the loading of the cassette is completed, the head stand 12 moves downward as described above. Therefore, the pin 182 slides on the side surface of the locking portion 180a, and when released from the side surface, the lever 180 is rotated counterclockwise by the spring force of the spring 185. When the head stand 12 is further moved downward in this state, the playing state shown in FIG. 20 is reached. When the beginning of a song is searched from a playing state, the plunger 23 is extended and the head stand 12 is moved upward by the spring force of the springs 167 and 168. At this time, the pin 182 comes into contact with the locking portion 181, and thereafter upward movement of the head stand 12 is restricted. This state is the beginning of a song, and also the fast-forwarding and rewinding states. Such a situation is illustrated in FIG. 20.3. After the beginning of the song, the plunger 23 retracts again, the head stand 12 moves downward, and the 20th
The performance state shown in FIG. 2 is reached.

When ejecting, when the eject lever 20 is pushed in, the end of the portion 180b of the lever 180 is pressed to the left, so that the lever 180 is rotated clockwise around the axis of the pin 185, and at the same time, as described above, the end of the portion 180b is pressed to the left. The switch 22a
It becomes the off state and the head stand 12 moves upward.
At this time, since lever 180 is rotating, pin 1
82 and returns to the state shown in FIG. 20.

In this way, the head stand 12 can be placed at predetermined positions corresponding to each of the times of playing, finding the beginning of a song, and ejecting.

Next, to explain the fast-forward lock mechanism, referring again to FIG. 6, above the fast-forward lever 13 and the rewind lever 14,
Lock part 1 for locking the pressed state of 4
89 are arranged. This lock portion 189 is
A lock lever 190 that commonly abuts each lever 13, 14, and a cam lever 19 that extends at the upper end of the lock lever 190 in a direction perpendicular to its longitudinal direction.
It consists of 1 etc.

FIG. 21 is an exploded perspective view of the lock portion 189. Also referring to FIG. 6, the cam lever 191 is
It includes a first cam lever 192 and a second cam lever 193. This first cam lever 192 is connected to the cam plate 11
3, and the second cam lever 193 is placed on the first cam lever 192. A locking hole 194, a long hole 195, a locking hole 196, and a long hole 197 are sequentially formed in the first cam lever 192 from the top to the bottom in FIG. 2nd cam lever 1
93 is also provided with a locking hole 198, a long hole 199, a locking hole 200, and a long hole 201 corresponding to each hole 194, 195, 196, 197 of the first cam lever. The first cam lever 192 and the second cam lever 193 are movable in the vertical direction in FIG. 21, and are biased in the proximal direction by a spring 201.

A protrusion 202 is erected at the left end of the lock lever 190 in FIG. The lock lever 190 is biased by a spring 203 in a direction opposite to the cassette insertion direction (to the right in FIG. 20).

The protrusion 112 provided on the connecting portion 20a of the eject lever 20 has locking holes 198, 194,
113a are inserted one after another.

Figure 22 shows the lock lever 190 and cam lever 1.
91 is a plan view showing a configuration related to the device 91. FIG. Before inserting the cassette, the leaf switch 22b is in the on state and the leaf switch 22a is in the off state, as shown in FIG. 22. When the cassette is inserted, the connecting portion 20a moves in the opposite direction to the cassette insertion direction F as described above, so that the cam 113 is rotated clockwise around the pin 114 via the pin 112, and as shown in FIG. As shown in , the leaf switch 116b is turned on, the plunger 23 is retracted, and the head stand 12 moves toward the cassette. Note that the locking hole of the first cam lever 192 widens toward the right, and since the first cam lever 192 is biased upward by the spring 201, the movement of the protrusion 112 to the right causes an upward movement. is displaced.

During tape fast forwarding, when the fast forwarding lever 13 is pushed in the cassette insertion direction F, as shown in FIG.
The lock lever 190 is pressed as shown in FIG.
As a result, the second cam lever 193 is displaced to the right, and the protruding piece 210 of the second cam lever 193 pushes the leaf switch 22.
b is in the off state, the plunger 23 is extended, the head stand 12 is retreated, and the projection 202 is attached to the lever 192.
is engaged and the lever 190 is locked. At this time, as described above, the music head 12a is moved back to the extent that the tape and the head 12a come into gentle contact with each other by the song cue locking mechanism, and then stopped.

FIG. 23 is a perspective view of the vicinity of the fast-forward lever 13 and the rewind lever 14, and FIG.
FIG. 25 is a sectional view taken along the section line Y--Y in FIG. 22. A fast forward lever 13 and a rewind lever 14 are arranged above the pinch roller 56. The fast-forwarding lever 13 has a fitting hole 250 in a straight line along its longitudinal direction.
251 are formed at regular intervals. The distance between the fitting hole 250 and the fitting hole 251 is set to a length corresponding to the amount by which the fast-forwarding lever 13 is pressed.
Fitting holes 252 and 253 having a similar configuration are also formed in the rewinding lever 14 at positions corresponding to the fitting holes 250 and 251. The fast forward lever 13 is provided with a downwardly extending downwardly extending portion 254, and the rewind lever 14 is also provided with a downwardly extending downwardly extending downwardly extending portion 254.
55 are provided.

An extension part 10c extending horizontally from the upper part of the side plate part 10b is disposed to surround the fast-forward lever 13 and the rewind lever 14. This rolling section 10
An insertion hole 256 is formed in c, and each of the levers 13 and 14 is inserted through the insertion hole 256 when the fast forward lever 13 is placed on the rewind lever 14. The extending portion 10c also has a rectangular through hole 2.
57, 258 are fitting holes 252, 250; 253,
It is formed at a position corresponding to 251.

A leaf spring 259 is urged downward and fixed to the upper surface of the extension portion 10c. This leaf spring 259 includes a base 260 and arm parts 261 and 262 extending from both ends of the base 260 in a direction perpendicular to the base 260. The free end portion 261a of the arm portion 261 is curved into a semicircular arc shape that projects downward. The free end portion 262a of the arm portion 262 also has a similar configuration.

When the levers 13 and 14 are not pushed in, the free ends 261a and 262a of the leaf spring 259
are connected to the fitting holes 250 and 2 through the guide holes 257 and 258.
52 is fitted. When fast-forwarding the tape, when the fast-forwarding lever 13 is pushed in, the hanging portion 254 presses the pressing surface 263 provided on the locking lever 190, and the locking lever 190 is displaced. When the fast-forward lever 13 is completely pushed in, the lock lever is locked by the cam lever, and the free ends 261a, 262a of the leaf spring 259 are inserted into the fitting holes 251, 25 through the through holes 258, 257.
3 and is locked. When the rewind lever 14 is pushed in when rewinding the tape, it is locked in the same manner as above.

In this way, each lever 13, 14 is connected to the leaf spring 25.
Since it can be locked only by the spring force of 9, the structure is simple and the operating feel is improved.

Note that when the lock lever 190 is released from the locked state, the lock lever 190 is biased in a direction opposite to the cassette insertion direction F by the spring force of the spring 202, and the spring force of the spring 202 locks the fast-forward lever 13. Since the spring force is greater than the spring force of the leaf spring 259, the lock lever moves in the opposite direction to the insertion direction F, and in conjunction with this, the fast forward lever 1
3 is also released from the locked state and returns to its original state.

Effects As described above, according to the present invention, the operation part and the lock part are separated, and a common lock lever is provided for the fast forward and rewind levers, so large parts can be omitted and space can be saved. It becomes possible to aim for. Furthermore, the electromagnetic solenoid that applies forward force to the head stand is deenergized by a lock cam that moves in conjunction with the operation of each lever, so the movement of the head stand can be controlled in response to fast forward and rewind operations. Since the electromagnetic solenoid is deenergized by a lock cam that locks each lever, the number of parts does not increase significantly.

[Brief explanation of the drawing]

1 is a simplified perspective view of a car stereo radio equipped with a cassette tape recorder according to the present invention, FIG. 2 is a simplified plan view of an embodiment of the present invention, and FIG. 3 is a diagram similar to that of FIG. 4 is a side view seen from the arrow B side in FIG. 2; FIG. 5 is a side view seen from the arrow C side in FIG. 2;
Figure 6 is a bottom view, Figure 7 is a front view with the cassette storage section 11 removed in Figure 2, and Figure 8 is a bottom view.
FIG. 9 is a perspective view of the vicinity of the side plate portion 10a before inserting the cassette, and FIG.
0 is an exploded perspective view of FIG. 9, FIG. 11 is a perspective view of the vicinity of the side plate portion 10a after the cassette is inserted, FIG. 12 is a perspective view showing the configuration related to the eject lever 20 and the trigger lever 21, and FIG. The figure is a sectional view taken from the cutting plane line - in Fig. 4, and Fig. 14 is a sectional view taken from the section line - in Fig. 4.
Sectional view taken from the cutting plane line - in the figure, No. 15
The figure is a sectional view taken from the cutting plane line - in FIG. 4, FIG. 16 is a plan view showing a simplified structure related to the head stand 12 before the cassette is inserted, and FIG. 17 is a view of the head stand 12 after the cassette is loaded. FIG. 18 is a simplified plan view showing the configuration related to the first
6 is a perspective view of the pinch roller 60 and the vicinity of the head stand 12, FIG. 19 is a rear view seen from the arrow L side of FIG. 16, and FIGS.
21 is an exploded perspective view of the lock portion 189, FIG. 22 is a plan view showing the structure related to the lock lever 190 and the cam lever 191, and FIG. 23 is a view showing the vicinity of the levers 13 and 14. 24 is an exploded perspective view of FIG. 23, and FIG. 25 is a cross-sectional view taken along the section line Y--Y of FIG. 22. 13...Fast forward lever, 14...Rewind lever,
190...lock lever, 191...lock cam.

Claims (1)

[Claims] 1 Fast forward lever 13 and rewind lever 1
4, one end abuts the fast-forwarding lever and the rewinding lever, and an engaging protrusion 2 on the other end.
02, a lock cam 191 that is displaced in response to the displacement of the lock lever and has an engagement hole 196 in which the engagement protrusion engages, a head stand 12 on which the magnetic head 12a is mounted, and the head base 12a. It is equipped with an electromagnetic solenoid 23 that applies a forward force to the table, and a leaf switch 226 for turning the electromagnetic solenoid on and off.During fast forwarding or rewinding, the lock lever is activated by pushing the fast forwarding lever or the rewinding lever. The lock lever is displaced in the pushing direction, and the lock lever is held by the lock cam, and the movement of the lock cam accompanying the displacement of the lock lever shuts off the leaf switch, deenergizes the electromagnetic solenoid, and reduces the forward force to the head stand. A tape fast forward lock mechanism characterized in that it is designed to be released.