JPS6028060A - Head stage mechanism - Google Patents

Abstract

PURPOSE:To move back a pinch roller alone from a head stage and to attain the program searching of music by engaging a pinch roller support member to the head stage and releasing this engaging state in the fast forward/rewind mode. CONSTITUTION:A support member 90 for a pinch roller 89 and an oscillating lever 79 are put through a pin 91, and the lever 79 is biased by a spring 83. Then an arm part 81 is detained by the detaining part 87a of a head stage 85 to which a head 88 is welded. In a reproduction mode, the head 85 and a support member 90 are engaged with each other and have a contact with a tape. This engaging state is released with a contact between the tip part of a rapid traverse lever 102 and a projection 90d of the member 90 when the lever 102 is pushed. The lever 79 is pulled by the spring 83 and therefore the roller 89 is turned counterclockwise. As a result, the roller 89 moves back alone from the stage 85. Thus the program searching of music is made possible.

Description

TECHNICAL FIELD The present invention relates to a head stand mechanism for a cassette tape recorder with track cue.

Background Art In a cassette tape recorder that is not equipped with a song cue mechanism, a pinch roller and a head stand are interlocked, and the head and pinch roller are both configured to move backward during fast forwarding or rewinding.

However, a head stand mechanism having such a configuration cannot be used in a cassette tape recorder with a track cue function, which requires only the pinch roller to move back and the head to be inserted into the tape during fast forwarding or rewinding. Can not.

Purpose An object of the present invention is to provide a head stand mechanism that allows the pinch roller and head stand to operate independently to locate the beginning of a song.

Example The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a simplified plan view of a cassette tape recorder and/or player in which the present invention is implemented, FIG. 2 is a front view seen from the arrow A side in FIG. The figure is a side view seen from the arrow B side in Figure 1, Figure 4 is a side view seen from the arrow C side in Figure 1, Figure 5 is a bottom view, and Figure 6 is a side view seen from the arrow C side in Figure 1. This figure is a rear view seen from the arrow mark side of FIG. 1, and FIG. 7 is a plan view showing the internal structure of FIG. 1 in a simplified manner.

A cassette support member 3 is provided upright on the left side of the substrate 1 in FIG. 1, and supports the cassette storage portion 2 so as to be movable up and down with respect to the substrate 1. A suppressing means 5 for turning on the switch 4 is provided near the tip of the support member 3 (the left end in FIG. 3). When the cassette is inserted into the cassette storage part 2, the cassette storage part 2 is lowered toward the board 1, and the switch 4 is turned on by the suppressing means 5, thereby energizing the motor 10. When the motor 10 is energized, a Boo! will be heard, which will be described later. J12. m
The partially toothed gear 34 is rotated clockwise via the wheel 28, etc., and the head stand 85 is moved to the left in FIG. Recording will start.

A motor 10 is provided on the board 1 . A pulley 12 is fixed to the output shaft of the motor 10 as shown in FIG.

An endless belt 1 is attached to the pulley 12 and the flywheel 14.
6 is applied to the output shaft of 10, and pulley 1 is connected to the output shaft of 10.
A pulley 18 is fixed coaxially with 2. Pulley 18 and boo') 20'.

An endless belt 24 is passed around 22. Pulley 2
0 is provided with a gear 26 coaxially.

This gear 26 is meshed with the gear 28, and the gear 28 is in mesh with the gear 3.
It is meshed with 0. A gear 32 is fixed to the rotating shaft of the gear 3o. This gear 32 is a partially toothed gear 3 pivotally supported on the base plate 1.
4 can be engaged with each other. When the motor 10 is driven, the pulleys 12, 18°20.22. Gear 26.28,3
0.34 and the flywheel 14 are constantly driven to rotate as shown by the arrow.

7'-! A gear 36 is coaxially fixed to J22 at a position above the board 1 as well. The winding rotation shaft 38 is inserted into one reel of the cassette.

A roller 40 and a gear 42 are provided. The rotational driving force of the pulley 22 and the gear 36 is transmitted to the roller 4o and the rotating shaft 3B via the gear 44°42.

The rotating shaft 46 of the gear 36 is fixed to a switching piece 48 for switching the running direction of the tape. The switching piece 48 is connected to the rotating shaft 46
It extends in the left-right direction in FIG. A gear 52 is provided on a rewinding rotating shaft 50 that is inserted into the other reel of the cassette, and is brought into mesh with the gear 36 by the downward displacement of the switching piece 48 in FIG. In the playing or fast-forwarding state, gear 36 is separated from gear 52. In the rewinding state, the gear 36 meshes with the gear 52, so that the rotational driving force of the gear 36 is transmitted to the gear 52, whereby the rewinding rotation shaft 50 is rotated in the opposite direction to the winding rotation shaft 38. Ru.

FIG. 8 is a perspective view of the vicinity of the tip of the support member 3;
This figure is a partially enlarged perspective view of FIG. 8, and FIG. 10 is a side view corresponding to FIG. 3 with the cassette inserted. A contact member 60 is rotatably supported by a shaft 61 at the distal end of the support member 3 . This abutting member 60 is composed of a substantially fan-shaped plate portion 62 and a protruding piece 63 continuous therewith. The abutment member 60 has a plate-shaped portion 62 disposed between the support member 3 and the cassette storage section 2, and a protruding piece 63 disposed on the inner side of the cassette storage section. A projection 64 is formed on the surface of the plate-like portion 62, and one end of a spring 65 is fixed to this projection 64. The other end of the spring 65 is fixed to the substrate 1.

When the cassette is inserted into the cassette storage section 2, the protruding piece 6
3 is pressed by the cassette, so that the abutting member 60
is angularly displaced by the rotation of the shaft 61 against the spring force of the spring 65. At this time, the plate-like portion 62Fi is displaced along the columnar projection 66 provided on the side surface of the cassette storage portion. When the abutting member 60 is angularly displaced, the abutting piece 67 of the switch 4 presses the switch 4, and the motor 1 becomes conductive.
0 is activated.

FIG. 11 is a perspective view of the vicinity of the upper part in FIG.
FIG. 12 is a perspective view seen from the arrow E side of FIG. 11,
FIG. 13 is a plan view of the partially toothed gear 34, and FIG. 14 is a side view of the partially toothed gear 34 as viewed from the side indicated by the arrow F in FIG. Missing tooth gear 34
On the upper surface of the toothless portion 70, a cylindrical first
A cam 71 is provided upright, and a second cam 72 having a shorter length than the cam 71 is provided adjacent to the other end of the toothless portion 70 .

Protrusions 73 and 74 are provided on the lower surface of the partially toothed gear 34 at positions corresponding to the cams 71 and 72, respectively.

The horizontal cross section of the 73 protrusions is roughly U-shaped.

The opening faces the support shaft 75 of the partially toothed gear 34. The horizontal cross sections of the protrusions 74 are arcuate and are arranged circumferentially around the support shaft 75.

An electromagnetic hook 76 is provided on the left side of the partially toothed gear 34 in FIG. A coil 77 is housed in the electromagnetic hook 76, and when the switch 4 is turned on, this coil 77
is excited. A rotation prevention piece 78 for preventing rotation of the partially toothed gear 34 is provided at the lower end of the electromagnetic hook 76 . This rotation blocking piece 78I'i is configured to be able to move toward and away from the partially toothed gear 34, as will be described later. A swing lever 79 is provided above the electromagnetic hook 76 in FIG. The swing lever 79 consists of a U-shaped base 80 and arm parts 81 and 82 extending from both ends of the base 80, as shown in FIG. By an ejecting spring 83 fixed to the end of the arm 82.

The swing lever 79 is biased to the right in FIG. The arm portion 82 of the swing lever 79 is arranged above the partially toothed gear 34 and in contact with the first cam 71 . When the partially toothed gear 34 is rotated clockwise, the swing lever 79 moves to the first position.
It is displaced to the left in FIG. 12 via the cam 71 against the spring force of the spring 83. By the displacement of the swing lever 79, the head stand 85 is displaced to the left in FIG. 1 and comes into contact with the tape, thereby entering the playing or recording state.

FIG. 15 is a perspective view showing a configuration related to the head stand 85, and FIG. 16 is a simplified exploded perspective view of FIG. 15. The head stand 85 provided on the substrate 1 has a plate-like body 86
and an engagement piece 87 extending in a direction perpendicular to the plate-like body 86. A locking portion 87a of the engaging piece 87 bent in an L-shape is in contact with a free end portion of the arm portion 81 of the swing lever 79. Therefore, the head stand 85, which is always biased downward in FIG. 15 by a spring (not shown), is prevented from moving downward by the swing lever 79. A head 88 is fixed onto the head stand 85 with pins or the like.

A pinch roller 89 is attached to the support member 9 on the left side of the head stand 85.
The pinch roller 89 is rotatably supported by the capstan 92, and can press against and separate from the capstan 92. The upright portion 90aK of the support member 90 is provided with an L-shaped locking piece 90b that extends horizontally, and a cylindrical projection 90d projects from the flat plate portion 90c that extends horizontally from above the upright portion 90a. has been done. Support member 90
A flat plate portion 90 extending horizontally from below the standing portion 90a of
A hook-shaped engaging portion 93 is formed at one end of e, and this engaging portion 93 is connected to a protrusion 94 erected on the head stand 85.
can be engaged with.

A base portion 80 of the swing lever 79 and an upright portion 80a.

Flat plate portions 8 extending horizontally from both ends of the upright portion.
0b, 80c, and an L-shaped locking part 97 provided at the lower part of the standing part 80a.

The swing lever 791 and the support member 90 are inserted into the insertion hole 150 of the swing lever 79. Flat plate portion 90e of support member 90
The pins 91 are sequentially inserted through the insertion holes 152 formed in the
It is rotatably supported around the pin 91 by 1tQf+m. Further, the left end of the head stand 85 is arranged on the right side of the pin 91.

Both ends of the pin 91 are fixed to each substrate 1, 101. When the locking piece 90b provided in the upright portion 90aK of the support member 90 is locked to the upright portion 80a of the swing lever 79, the VC
, one end of a torsion spring 96 attached to surround the outer periphery of the pin 91 is locked to a locking portion 97 of the swing lever 79. The other end of the torsion spring 96 is fixed to the flat plate portion 90c of the support member 90. Therefore, the support member 90 and therefore the pinch roller 89 are biased clockwise, and the locking piece 90b is locked to the upright portion 80a of the swing lever 79, so that the rotational movement of the support member 90 is prevented. ing.

A fast forward/rewind mechanism 100 is provided above the head stand 85. The fast forward/rewind mechanism 100 is a board 101
．． It is comprised of a fast-forward lever 102, a rewind lever 103, a slide lever 104 that is movable in relation to the levers 102 and 103, and the like. A fast-forwarding lever 102 is mounted on the substrate 101 so as to be movable in the cassette insertion direction G. The fast-forward lever 102 is biased by a spring 105 in a direction opposite to the cassette insertion direction G. fast forward prever 102
A rewind lever 103 is placed on top.

The rewind lever 103 is also movable in the cassette insertion direction G similarly to the fast forward lever 102.

It is biased in a direction opposite to the cassette insertion direction G by a spring 106. A slide lever 104 is mounted on the rewind lever 103, and a protrusion 1 provided on the lever 103
07 is inserted into the elongated hole 108 formed in the lever 104. Also, the slide lever 104
A protrusion 110 of the substrate 101 is inserted into a long hole 109 formed at the left end of the substrate. A spring support member 300 surrounds the fast forward lever 102 and the rewind lever 103.
is attached to the board 101, and the lever 102.10
3 has a gap with the support member 300 and can move forward and backward. A similar elongated hole 112 is formed in the fast forward lever 102 and in the rewind lever 103 so as to match the elongated hole 111. Pins 113 erected on the substrate 1.degree. 1 are fitted into the elongated holes 111, 112. The slide lever 104 is biased in a direction opposite to the insertion direction G by a spring 114.

When the rewind lever 103 is pushed in, the slide lever 104 is guided by the pin 1°7 fitted into the elongated hole 108 and moves in the cassette insertion direction GKG. When the fast-forwarding lever 102 is pushed in, the engaging piece 114 erected at the tip of the fast-forwarding lever comes into contact with the engaging portion 115 of the slide lever 104, so that as the fast-forwarding lever 102 moves, the slide lever 104 also move in the same direction.

Lever 102, 103 (7) On the left side, lever 102.
A trigger lever 115 is arranged to keep the levers 102 and 103 locked when 103 is pushed in. This trigger lever 115 consists of an upper lever 116 and a lower lever 118. Upper lever 116t=t, arm portion 116a extending toward fast-forward lever 102, and arm portion 1
It includes an arm portion 116b extending in a direction opposite to that of arm portion 116a. A lower lever 118i1t provided directly below the upper lever 116
, has substantially the same shape as the arm portion 116a. Upper lever 11
6 and the lower lever 118 are inserted into the insertion holes 119, 120, 1
21 and is rotatably supported around the axis of the pin 122. As shown in Figure 12, the partially toothed gear 34 is rotated clockwise.

Therefore, the second cam 72 is rotated, and the trigger lever 1
Push up the end of trigger lever 115, pin 1
It is rotated clockwise around 22.

FIG. 17 is a simplified plan view showing the configuration related to the head stand 85, the fast-forward lever 102, and the rewind lever 103, and FIGS. 18 to 20 are the operations of the pinch roller 89 and the vertical movement of the head stand 85. It is a figure for explaining a state. Before inserting the cassette, the head stand 85
The arm portion 8 of the swing lever 79 is attached to the locking portion 87a of the engaging piece 87.
1 (the right end in FIG. 17) are in contact with each other, and the swinging lever 79 is biased counterclockwise by the ejecting spring 83. Therefore, the head stand 85, which is biased downward in FIG. 17, is prevented from moving downward by the not-illustrated spring.

When the cassette is inserted, the partially toothed gear 34
is rotated clockwise, and the swing lever 79 swings clockwise around the entire center of the pin 91. When the swinging lever 79 and therefore the arm section 81 swing, the end of the arm section 81 and the locking section 87a of the head stand 85 are unlocked, and the arm section 81
According to the displacement, the head stand 85 is also displaced downward in FIG. At this time, the upright portion 8° of the swing lever 79 rotates clockwise, so that the spring force of the screw spring 96 causes the support member 9o and the pinch roller 89 to also rotate clockwise. In this way, when the end of the arm portion 82 of the swing lever 79 reaches the upper limit, the pinch roller 8
9 is crimped onto the capstan 92. pinch roller 89
is crimped to the capstan 92 via the tape,
The tape is driven at a constant speed. During tape playing, the contact portion of the tape that contacts the pinch roller 89 and the head 88 always projects slightly downward. In this manner, the tape is sufficiently pressed against the pinch roller 89 and the head 88, so that accurate reproduction is performed.

During fast forwarding, the fast forwarding lever 102 is pushed to the left in FIG.
is separated from the capstan 92 and largely retreats upward, and the head stand 85 retreats to a predetermined position where the head 88 is inserted into the tape by a relatively small amount. To explain in more detail, the tip of the fast-forwarding lever 102 (the first
On the side of the bent portion 160 at the left end in FIG. When pushed to the left in the figure, a protrusion 90d provided on the support member 90 is guided into contact with the inclined surface, and as the lever 102 is displaced, the protrusion 90d and the pinch roller 89 are moved to the pin 9.
It is rotated counterclockwise around 1. When the pinch roller 89 is rotated, the protrusion 9 erected on the head stand 85 that is engaged with the hook-shaped portion 93 of the support member 90
4', the head stand 85 is retracted upward. In this way, the pinch roller 89 is sufficiently bent over the VC against the capstan 92, and the head 88 is moved to a predetermined position where the amount of head insertion into the tape is small. When rewinding, the rewind lever 103
When pushed in, the same operation as in the above-mentioned fast forwarding is performed, and the pinch roller 89 and head stand 85 are also moved in the same way.

When the cassette is ejected, when the swinging lever 79 is swung counterclockwise by the spring force of the ejecting spring 83 as shown in FIG. 87a is pushed upward, so that the head stand 85 retreats upward. At the same time, the support member 9
Therefore, the pinch roller 89 is rotated counterclockwise around the bin 91 by the spring force of the spring 96. In this way, the pinch roller 89 separates from the capstan 92, and the head 88 separates from the tape. Therefore, the cassette can be ejected without any problem.

In this way, when fast forwarding or rewinding, the head 88 is inserted into the tape and the pinch roller 79 is moved back, and when ejecting the tape, the head 88 and the pinch roller 89 are moved back. You can search for the beginning of a song.

FIG. 21 is a simplified plan view of the vicinity of the tip of the fast-forwarding spooler 102, FIG. 22 is a front view of the trigger lever 115, and FIG. 23 is a simplified plan view of the trigger lever 115 when the fast-forwarding lever 102 is pushed in. FIG. A retaining portion 160 that engages with one end of the trigger lever 115 is provided at the tip of the fast-forwarding lever 102, and a horizontal direction (second
A guide surface 166 extending in the left-right direction in FIG.
6, a guide surface 167 that slopes diagonally downward to the right in FIG.
is formed. A long hole 111 is formed above the guide surface 166 of the fast forward lever 102, into which a projection 113 on the substrate 1 is fitted. Retention part 1 of fast-forwarding lever 102
The upper lever 116 and lower lever 118 of the trigger lever 115 are engaged with the upper lever 116 and the lower lever 118 of the trigger lever 115. Moving piece 165
is in contact with a. This muting leaf switch 165 is a so-called muting switch that eliminates unpleasant sounds caused by contact between the tape and the head during fast forwarding or rewinding, and is a so-called muting switch that eliminates unpleasant sounds caused by contact between the tape and the head during fast forwarding or rewinding.
and a fixing piece 165b.

When the fast-forward lever 102 is pushed in, the image shown in FIG. 23 (1)
As shown, the upper lever 116 is guided by the guide surface 167 and moves downward, so that the swinging piece 165a comes into contact with the fixed piece 165b, and the leaf switch 165 becomes conductive.

When the fast-forwarding lever 102 is pushed further from the state shown in FIG. 23(1), the upper lever 116 is guided by the guide surface 168 and fitted into the recess 169, as shown in FIG. 23(2), and the fast-forwarding lever 102 becomes locked. At this time, the lower lever 118 stops on the guide surface 168. Since the guide surface 168 is also located below the guide surface 166, when the lower lever 118 is in contact with the guide surface 168.

The lower lever 1181d has also moved downward before the fast-forwarding lever 102 is inserted, so the lower lever 118 is pushed down by the swinging piece 165a' and comes into contact with the fixed piece 165b, thereby maintaining the conductive state of the leaf switch 165. Ru.

In this way, the muting leaf switch 165 can be made conductive during fast forwarding or rewinding, thereby eliminating unpleasant noises caused by contact between the head and the tape when searching for the beginning of a song.

FIG. 24 is a simplified plan view showing the structure related to the slide lever during tape playing, FIG. 25 is a plan view corresponding to FIG. 24 during fast forwarding or rewinding, and FIG. 26 is a plan view corresponding to FIG. 24 is an enlarged plan view of a part of FIG. 24. FIG. As mentioned above, the rotational driving force from the motor 10 is applied to the pulley 12. Also, the partially toothed gear 34 is rotated clockwise via the gear groups 20.28 and 30.31. Missing tooth gear 34
When the gear 31 rotates at position 1 of the toothless portion 70, the rotation prevention piece 78 of the electromagnetic hook 76 engages the toothless gear 3.
The partially toothed gear 3 is engaged with the projection 74 provided on the lower surface of the gear 3.
4 stops rotating, and after that, the end of the toothless part 70 and the gear 3
1 is idling.

Tape performance is performed in this state. When the fast forwarding lever 102 is pushed in, the slide lever 104 moves upward in FIG. 25 as shown in FIG. 25. Further, as described above, the trigger lever 115 is locked with the fast-forwarding lever 102, and the pinch roller 89 is further separated from the capstan 92. When a fast-forward operation is performed in such a state, when the head 88 detects an interval between songs on the tape, the coil 77 is instantaneously demagnetized. When the coil 77 is demagnetized, the electromagnetic hook 76 operates, and therefore the engagement between the rotation prevention piece 78 and the protrusion 74 is released, allowing the partially toothed gear 34 to rotate clockwise. As the partially toothed gear 34 rotates, the swinging lever 79 starts to swing counterclockwise by the spring force of the ejecting spring 83. After the swing lever 79 is slightly displaced, it comes into contact with the tip of the slide lever 104, and the swing movement of the swing lever 79 is blocked.

This prevents the tape from being ejected.

In this state, as shown in FIG.

When the partially toothed gear 34 further rotates, the cam 72 displaces the trigger lever 115 to the right. This trigger lever 11
5 is displaced, the locked state with the fast-forward lever 102 is released, and the fast-forward lever 102 returns to its original state. At the same time, the pinch roller 89 is also pressed against the capstan via the tape, and the playing state is restored.

At this time, the partially toothed gear 34 is again prevented from rotating by the rotation blocking piece 78.

In this way, by slightly angularly displacing the cam 72 after detecting the song interval, it is possible to return to the playing state, so that even if the song interval is short, it is prevented from hitting the beginning of the song or the oil passage.

FIG. 27 is a perspective view of the electromagnetic hook 76, and FIG. 28 is a rear view seen from the H side in FIG. 27.

FIG. 29 is a bottom view seen from the I side of FIG. 27.

FIG. 30 is an exploded perspective view of FIG. 27. Referring to these drawings, the electromagnetic hook 76 is fixed to the substrate 1 with pins 191 and 192. Electromagnetic funk 76 coil 7
7, a holding member 200 that holds the coil 77, and an armature 201 that is attached to the holding member 200 in close proximity to the end of the coil 77. Holding member 20
0 includes a bottom plate portion 202 and side plate portions 203, 204, and 205 that extend perpendicularly to the bottom plate portion 202. Side plate part 203
and the side plate portion 205 are parallel, and the side plate portion 204 is perpendicular to the side plate portions 203 and 205. A protrusion 206 is formed at the end of the side plate 205 and protrudes in the longitudinal direction, and the protrusion 206 is provided with an insertion hole 208 through which a rod-shaped spring 207 is inserted.

The armature 201Fi has an L-shaped horizontal cross section, and includes a base plate 209 facing the side plate 204 of the holding member 200, and a free end 2 extending perpendicularly from the base plate 209.
10. A stepped portion 209a is formed in the substrate portion 209, and an insertion hole 211 through which the protruding portion 206 of the holding member 200 is inserted is provided in the stepped portion 209a. After the protrusion 206 is inserted into the insertion hole 211, the rod-shaped spring 207 is inserted into the insertion hole 208 and fixed, so that the armature 201 can freely swing in the direction of arrow J around the protrusion 206'. .

At the lower end of the free end portion 210, a locking piece 212 bent inwardly and a rotation blocking piece 78 bent outward are provided in sequence from the front to the rear in FIG. 27. It is being One end of the spring 213 is connected to the locking piece 212, and the other end is connected to the locking piece 214 of the bottom plate portion 202.

When the coil 77 is excited, the base plate 2 of the armature 201
09 comes into contact with the end 77a of the coil 77, so that the armature 201 is swung clockwise against the spring force of the spring 213. When the coil 77 is demagnetized, the spring force of the spring 213 causes the armature 201 to swing counterclockwise.

FIG. 31 is a simplified plan view showing the configuration connected to the partially toothed gear 34, FIG. 32 is a partially enlarged plan view of FIG. 31, and FIG. 33 is a cross-section of FIG. 32. It is a sectional view seen from plane MK-K. A leaf spring 230 is disposed below the partially toothed gear 34. Further, below the partially toothed gear 34 and diagonally above the right side of the leaf spring 230 in FIG.
A switch 231 is provided to stop the rotational drive of the motor. When ejecting from the playing state, coil 7
7 is demagnetized, so that the armature 201 and therefore the rotation blocking piece 78 are displaced in a direction away from the partially toothed gear 34, and the partially toothed gear 34 is allowed to rotate. The swing lever 79 is swung once counterclockwise in accordance with the rotation of the partially toothed gear 34, and then the swing lever 79 is wound up again by the partially toothed gear 34.

When the protrusion 73 provided on the lower surface of the partially toothed gear 34 slightly exceeds the locking protrusion 232 provided on the leaf spring 230, the tip of this protrusion 73 touches the leaf switch 231.
As a result, the swinging piece 231a and the fixed piece 231b are separated, and the rotation of the motor 10 is stopped. This state is the state before the cassette is inserted.

When the rotation of the motor 10 is stopped, the rotation of the partially toothed gear 34 is stopped, and therefore the swing lever 79 is biased counterclockwise by the spring force of the ejecting spring 83.

However, the protrusion 73 is in contact with the locking protrusion 232, and therefore the reverse rotation movement of the partially toothed gear 34 is prevented.

FIG. 34 is a perspective view of the leaf spring 230, FIG. 35 is a front view of the leaf spring 230, and FIG. 36 is a right side view thereof. Leaf spring 23 (1, flat plate part 230a, flat plate part 2
A vertical portion 230b that continues below 30a, and a vertical portion 230
and a base portion 230c extending horizontally from b. Flat plate part 2
A 30alCu locking protrusion 232 is provided. Flat plate part 23
At the right end of 0a are approximately triangular bent portions 230d, 23.
0e is formed. Since the leaf spring 230 is disposed in the tangential direction of the circular locus of the protrusion 73, the flat plate portion 23
By providing the bent portions 230d, 230e'f- at the right end of the flat plate portion 230a, the protrusion 73 and the right end of the flat plate portion 230a are prevented from coming into contact with each other.

Note that the flat plate portion 230a is biased upward.

Therefore, when the protrusion 73 exceeds the locking protrusion 232 and then starts reverse rotation, the protrusion 73 and the locking protrusion 232 are reliably connected to each other.
2 engages with each other, and the partially toothed gear 34 is prevented from rotating in the opposite direction.

Effects As described above, according to the present invention, the pinch roller can be retreated with the head inserted during fast forwarding or rewinding, and the head and pinch roller can be retreated during ejection.

[Brief explanation of drawings]

FIG. 1 is a simplified plan view of a cassette tape recorder and/or player in which the present invention is implemented, and FIG. 2 is a front view seen from the side indicated by arrow A in FIG. Figure 3 is a side view seen from the arrow B side in Figure 1, Figure 4 is a side view seen from the arrow C side in Figure 1, Figure 5 is a bottom view, and Figure 6 is a side view seen from the arrow C side in Figure 1.
The figure is a rear view seen from the arrow mark side of FIG. 1, FIG. 7 is a plan view showing a simplified internal structure of FIG. 1, FIG. Figure 9 is an enlarged part of Figure 8. A perspective view, FIG. 10 is a side view corresponding to FIG. 3 with the cassette inserted, FIG. 11 is a perspective view of the vicinity of the upper part in FIG. 1, and FIG. 12 is a side view corresponding to FIG.
A perspective view as seen from the side, FIG. 13 is a plan view of the partially toothed gear 34,
Figure 14 Fi Side view seen from the arrow F side in Figure 13, 1st
FIG. 5 is a perspective view showing the configuration related to the head stand 85;
Figure 6 is an exploded perspective view of Figure 15. FIG. 17 is a simplified plan view showing the configuration related to the head stand 85 and levers 102, 103, and FIGS.
0 is a diagram for explaining the operating states of the pinch roller 89 and the head stand 85, FIG. 21 is a diagram for explaining the operating states of the fast-forward lever 102, trigger lever 115, and bar 115, and FIG. 25 is a simplified plan view showing the configuration related to the slide lever <-104, the partially toothed gear, and the trigger lever 115. FIG. 25 is a plan view corresponding to FIG. 24 during fast forwarding or rewinding.
Fig. 27 is a perspective view of the electromagnetic hook 76, Fig. 28 is a rear view of the electromagnetic hook 76 as seen from the H side of Fig. 27, and Fig. 29 is a plan view of Fig. 27. 30 is an exploded perspective view of FIG. 27, FIG. 31 is a simplified plan view showing the configuration related to the partially toothed gear 34, and FIG. 32 is the same as that of FIG. 31. Partially enlarged plan view, No. 33
The figure is a sectional view taken from section line K-K in Figure 32.
4 is a perspective view of the leaf spring 230, and FIG. 35 is a perspective view of the leaf spring 230.
36 is a front view thereof, and FIG. 36 is a right side view thereof. 79... Swing lever, 85... Head stand, 87a.
...Locking portion, 88... Head, 89... Pinch roller, 90... Pinch roller holding member, 90d, 94.
··protrusion. 93...Hook-shaped locking part, 96...Torsion spring agent
Patent Attorney Kei Nishi Department Figure 5 Figure 7 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 27-28 Figure 29 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36

Claims (1)

[Claims] In a head stand mechanism of a cassette tape recorder with track cueing, which is composed of a swing lever, a pinch roller, a holding member that holds the pinch roller, and a head stand, the head stand has a swingable (-) 1. A head stand mechanism, comprising a locking part that locks one end, and the holding member is provided with a retracting means for retracting the pinch roller independently from the head stand during fast forwarding or rewinding of the tape.