JPS63239643A - Brake mechanism for tape driving device - Google Patents

Abstract

PURPOSE:To simply and inexpensively constitute a whole mechanism by constituting the mechanism restricting two reel bases of 1st and 2nd brake levers, an energizing member energizing these levers in prescribed directions and a pin operating the levers. CONSTITUTION:The brake mechanism restricts the reel bases 60, 61 so as not to rotate them in accordance with respective modes of a tape recorder. Supporting shafts 153, 154 are fixed, the 1st brake lever 156 is freely rotatably supported by the supporting shaft and the 2nd brake lever is freely rotatably supported by the supporting shaft 154. The brake lever 15 is energized in the counterclockwise direction by a spring 180, the brake 157 is energized in the clockwise direction together with left direction, and when the pin 185 is moved in the horizontal direction, the brake levers 156, 157 are rotated or moved in the horizontal direction following the pin 185. Consequently, the complexity of the mechanism in the brake constitution and cost-up can be dissolved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a brake mechanism for a tape drive device for a tape recorder, in which a reel stand is restrained from rotating according to a predetermined mode. Regarding.

"Prior art" Rotating head video tape recorder (VTR), digital audio tape recorder (R-DAT), 8
A tape recorder such as +n+n video is configured to pull out a magnetic tape from a tape cassette loaded in the device, wind the magnetic tape around a head drum (rotary head), and run it. In such a tape recorder, the tape drive device must be configured to perform tape loading and tape unloading operations. In such a tape drive device for a tape recorder, it is necessary to have a configuration in which one of the supply reel stand and the take-up reel stand is fixed so that it cannot rotate, and the other can be driven to take up the tape. In other words, without such a configuration, the absolute position of the magnetic tape may shift unexpectedly due to variations in the load on the reel stand when loading or unloading the magnetic tape, or This is because an inconvenience may occur, such as unnecessarily rewinding the magnetic tape even though unloading has already been completed. Therefore, in the above-mentioned tape recorder, in addition to the operation of fixing both reel stands and releasing both reel stands, which was conventionally performed in compact cassette tape recorders, etc., it is necessary to have a mode in which one of the reel stands is fixed and the other is released. It's coming.

Conventionally, a brake mechanism for a tape drive device that satisfies the above requirements is shown in FIG. 8.

In FIG. 8, 1 is a supply side reel stand, and 2 is a take-up side reel stand. A gear portion 3 is formed on the outer peripheral surface of the take-up reel stand 2. A cassette case is attached to these reel stands 1.2, and the magnetic tape in the cassette case is pulled out and run. A support shaft 5.6 is arranged near the reel stand 1.2, and a brake lever 7.8 is rotatably attached to the support shaft 5.6.

The brake lever 7.8 is adapted to be rotated in the directions of arrows A and B by a first drive mechanism (not shown).

When these brake levers 7.8 are rotated in the direction of the arrow, their rotating ends 9.10 come into pressure contact with the outer peripheral surface of the reel base 1.2, making it impossible to rotate the reel bases 1, 2. The above-mentioned restraint is released when it is rotated in the direction of arrow B. Further, a support shaft 11 is arranged near the reel stand 2, and a lock lever 12 is rotatably attached to the support shaft 11. The lock lever 12 is rotated in the directions of arrows C and D by a second drive mechanism (not shown). When this lock lever 12 is rotated in the direction of arrow C, its rotating end 13 is connected to the gear part 3 of the reel stand 2.
The reel stand 2 is engaged with and restrained from rotating, and when it is rotated in the direction of the arrow, the above-mentioned restraint is released.

In the above-described brake mechanism, when both reel stands 1.2 are restrained from rotating, the first drive mechanism is operated to rotate the brake lever 7.8 in the direction of the arrow. 8 rotating end 9. lO reel stand 1.2
The reel stand 1.2 is made unrotatable by being pressed against the outer peripheral surface of the reel stand 1.2. In addition, in order to make both of the reel stands 1.2 rotatable (released state), the rotating end 13 of the lock lever 12 is separated from the gear part 3 of the reel stand 2, and in this state, the 1 by operating the drive mechanism of brake lever 7.
8 in the direction of arrow B, and rotate the rotating end 9.8 of the brake lever 7.8. The lO is separated from the outer peripheral surface of the reel stand 1.2. In addition, in order to restrain only the reel stand 2 of the reel stand 1.2 from rotating, the rotating end 9°IO of the brake lever 7.8 should be separated from the outer peripheral surface of the reel stand 1.2. In this state, the second drive mechanism is operated to rotate the lock lever 12 in the direction of arrow C, and the rotating end 13 of the lock lever 12 is engaged with the gear part 3 of the reel stand 2, thereby rotating the reel. The table 2 is restrained so that it cannot rotate.

"Problems to be Solved by the Invention" By the way, the above brake mechanism has a lock lever 12 in addition to the brake lever 7.8 as a member for restraining the reel stand 1.2, and also has a lock lever 12 as a member for restraining the reel stand 1.2.
8. Since the structure has two drive mechanisms, the first and the second, as the mechanisms for driving Lockle/(-12), the structure of the entire brake mechanism becomes complicated and the brake mechanism becomes expensive. .

In this invention, 'f' of the configuration in the above-mentioned brake mechanism is
J. The problem is that it is complicated and expensive.

"Means for Solving the Problems" The present invention is attached to a tape drive device that runs a magnetic tape using a supply reel and a take-up reel, and depending on a predetermined mode, either one of the two reels is selected. Or a brake mechanism that restrains both of them from rotating, ■
The first grooves are disposed at a constant interval on an imaginary line that is outside the outer peripheral surfaces of the two reel stands and is substantially parallel to the direction between the support axes of the two reel stands. the second support shaft;
a first rod portion rotatably supported on a support shaft and extending from the first support shaft in the direction of the second support shaft;
a first brake lever having a second rod extending from the support shaft in the direction between the two reel stands and coming into contact with and separating from the outer circumferential surface of one of the reel stands as the lever rotates;
a third rod portion rotatably supported by the second support shaft and movable within a certain range in the direction of the virtual line, and extending from the second support shaft in the direction of the first support shaft; a fourth rod extending from the support shaft in the direction between the two reel stands and coming into contact with and separating from the outer peripheral surface of the other reel stand as the rod rotates or moves in the direction of the imaginary line; 2
and (1) biasing the first brake lever in a direction in which the second rod portion comes into contact with the outer peripheral surface of the one reel stand, and pressing the second play and kill levers against the fourth brake lever. a biasing member that biases the rod in a direction in which it comes into contact with the outer circumferential surface of the other reel stand and biases the second brake lever in the direction of the first support shaft; and a pin that engages with the first and third rod portions so as to resist the force, and by moving the pin, the first brake lever is rotated as a result of this pin. The second brake lever is rotated or moved in the direction of the virtual line.

"Embodiments" Examples of the present invention will be described below with reference to FIGS. 1 to 7.

1 to 7 show the structure and operation of a tape recorder equipped with a brake mechanism according to the present invention. The explanation will be divided into the following sections regarding the configuration and operation of the tape recorder.

A. Chassis (Figures 3 to 5) B. Reel stand (Figures 3 to 5) C. Head drum (Figures 3 to 5) D. Capstan (Figures 3 to 5) ) E, Tape loading mechanism (Fig. 3, Fig. 4, Fig. 6) E-t, Moving block (Fig. 3, Fig. 4) E-2, Drive gear (Fig. 6) F, Pinch roller ( 3, 4, 6), G, Tape tension mechanism (Fig. 3, 4, 6) H, Brake mechanism (Fig. 1 (A) to (C), 2) - Figures 4 and 6) ■Other configurations (Figures 3 and 4) J. Operation of the tape recorder (Figures 1 (A) to (C), Figures 4, 6, and (Figure 7) A, Chassis (Figures 3 to 5) 50 is a metal chassis, and this chassis 50 has a front end portion (the downward direction in the paper is the front side, the upward direction is the rear side, An opening 51 is formed in the left side (the left direction is defined as the left side, and a right direction is defined as the right direction), and a head drum mounting hole 52 is formed in the rear end. Furthermore, guide slots 53 and 54 are formed in the chassis 50 so as to extend from the front of the head drum mounting hole 52 to both left and right sides of the mounting tag 52. Projecting walls 55, 55 projecting upward are formed at the rear ends of the guide elongated holes 53, 54, and a positioning plate having a V-shaped groove 56, 56 at the front end is formed on the upper surface of the projecting walls 55, 55. 57.57 is fixed.

B. Reel stand (FIGS. 3 to 5) Reel stand support shafts 58 and 59 are provided upright on both left and right sides of the opening 51 on the upper surface of the chassis 50, and the reel stand support shafts 58 and 59 are provided with reel stand support shafts 58 and 59. A table 60, 61 is rotatably supported. The reel stand 60 is a reel stand on the supply side, and the reel stand 61 is a reel stand on the winding side. Reel stand 60.
Gears 62 and 63 are formed on the outer peripheral surface of the reel 61, and a drum portion 64 used for applying tape tension, which will be described later, is formed on the lower surface side of the reel stand 60. In addition, a reel engagement shaft 65.6 is provided at the center of the upper surface of the reel stand 60.61.
6 is provided. The reel engaging shafts 65 and 66 engage with the tape reel in the tape cassette 67 to rotate it integrally.

On the other hand, a reel stand driving motor 68 is attached to the front end side of the opening 51 on the lower surface of the chassis 50. This motor 68 is connected to the reel stand 60 via gears 69A and 69B.
Or it drives the reel stand 61.

C. Head drum (Figures 3 to 5) chassis 50
A head drum 70 is attached to the rear end of the head drum 70 .

The head drum 70 consists of an upper drum 71, a middle drum 72, and a lower drum 73. The upper drum 71 is provided with magnetic heads 70A, 70A on its peripheral surface.
The upper drum 71 is rotatable relative to the middle drum 72. The middle drum 72 and the lower drum 73 constitute a drum motor, and the lower drum 73 is rotatable with respect to the middle drum 72. The lower drum 73 is provided coaxially with the upper drum 71, and when the lower drum 73 rotates, the upper drum 71 rotates. The middle drum 72 has a mounting wall 74.7.
5 is formed, and the mounting wall portions 74, 7.5 are attached to support stands 76, 77, 78 formed on the upper surface of the chassis 50. Here, the upper drum 71. Middle drum 72
protrudes above the chassis 50, and the lower drum 73 protrudes below the chassis 50 through the head drum attachment hole 52. The center axis of the entire head drum 0 is inclined to the left by a certain angle with respect to a vertical line perpendicular to the chassis 50.

D. Capstan (Figures 3 to 5) Chassis 50
A capstan 79 is provided on the right side of the guide elongated hole 54 on the top surface. This capstan 79 is connected to the chassis 5
It is driven by a capstan drive motor 80 attached to the rear end of the right corner of the top surface of the camera.

E. 1 tape loading mechanism (Fig. 3, Fig. 4, Fig. 6)
Figure) 83 is a tape loading mechanism. The main components of this tape loading mechanism 83 include a moving block provided with a tape loading post, a pinch roller and a moving guide post, and a drive gear that drives each of these members.

E-1, moving block (Fig. 3, Fig. 4) chassis 50
These guide slots 53 and 54 are
．． Moving blocks 84, 85 are mounted to be movable along 54. Tape loading posts 86A and 86B, inclined guide posts 87A and 87B, and positioning pins 88 and 89 are provided upright on these moving blocks 84 and 85, respectively. The moving blocks 84, 85 are moved to the non-loading position (tape loading post 86) shown in FIG.
Magnetic tape 90 of tape reel soto 67 with A, 86B, and inclined guide posts 87A, 87B loaded into the device
position) and the loading completion position (move blocks 84 and 85 shown in FIG.
6) along the guide elongated holes 53 and 54.

E-2, Drive Gear (Fig. 6) A support shaft 93.
94 is fixed, and drive gears 95 and 96 are rotatably supported on support shafts 93 and 94. drive gear 95
．． The teeth of 96 are engaged with each other. A cam portion 97 is formed on the upper surface of the drive gear 95, and a cam portion 98 is formed on the upper surface of the drive gear 96. The driving gear 95 and the first multi-acting block 84 are the bins 99, 100,
They are connected by a loading post link 101, and the drive gear 96 and moving block 85 are connected by bins 102, 103 and a loading post link 104. The drive gears 95 and 96 are driven by a loading motor 106 via a gear train 105.

Thus, when the movable blocks 84, 85 are in the non-loading position, the drive gear 95 is rotated counterclockwise, and the drive gear 96 is rotated counterclockwise.
When the movement blocks 84 and 85 are rotated clockwise (hereinafter referred to as the loading direction), the moving blocks 84 and 85 move toward the loading completion position. When the moving block 84.85 is at the loading completion position, the drive gear 95 is rotated once clockwise and the drive gear 96 is rotated counterclockwise, the moving block 84.85 is moved toward the non-loading position. do.

In addition, in the above configuration, when the drive gears 95, 96 rotate in the loading direction to bring the moving block 84, 85 to the loading completion position, the driving gears 95, 96 continue to rotate at a constant speed while leaving the moving block 84, 85 at that position. It can be rotated in the angular loading direction.

F. Pinch roller (Figs. 3, 4, and 6) A support shaft 109 is fixed to the right end of the upper surface of the chassis 50.
A pinch roller arm 110 and one end of an auxiliary arm Ill are rotatably attached to the support shaft 109. A support shaft 112 is provided at the other end of the pinch roller arm 110.
is fixed, and a pinch roller 11 is fixed to the support shaft 112.
3 is rotatably supported. The lower end of the support shaft 112 projects below the pinch roller arm 110, and one end of a guide post arm 4 is rotatably attached to the projecting end.
A moving guide post 115 is fixed to the other end of 14. The lower end of the movable guide post 115 projects below the guide post arm 114, and the projecting end is inserted into a groove cam tte formed on the upper surface of the chassis 50. The auxiliary arm 111 has a bottle 1 projecting downward.
17 is fixed, and the bottle 117 is inserted into the cam portion 98 of the drive gear 96 through a long hole 118 formed in the chassis 50.
It is now possible to engage with. The pinch roller arm 110 and the auxiliary arm 111 are configured to rotate together, and these arms are supported by a spring 1.
19 in the clockwise direction in FIG. Here, the rotating end of the pinch roller arm 110 is engaged with the moving block 85 in the non-loading position shown in FIG.

Thus, the pinch roller arm 110 rotates as the moving block 85 moves and the cam portion 98 of the drive gear 96 rotates.

G. Tape tensilon mechanism (Fig. 3, Fig. 4, Fig. 6,
) 121 is a tape tension mechanism. The tape tension mechanism 121 is a mechanism that applies a constant back tension to the magnetic tape running on a predetermined path during the play mode, and is configured as follows.

A support shaft 122 is fixed to the left end of the upper surface of the chassis 50, and the tension adjustment arm 1 is attached to the support shaft 122.
One end of 23 is rotatably attached. The tension adjustment arm 123 is formed in the shape of a fishhook, and an engagement shaft portion 124 is formed at one end thereof, and a tension adjustment pin 125 is fixed to the other end. Furthermore, an engagement protrusion 126 is formed at one end of the tension adjustment arm 123, and a spring 128 is stretched between the engagement protrusion 126 and an engagement protrusion 127 formed on the chassis 50. There is.

With this configuration, the tension adjustment arm 123 is biased counterclockwise, and the tension adjustment pin 125 is engaged with the moving block 84 during non-loading. Furthermore, a support member 130 having a shaft portion 129 is attached to the front of the support 1122 of the chassis 50.

Attachment members 144, 144 are fixed to both ends of the tensioning band 143, respectively, and the middle portion serves as a band main body. The mounting members 144, 144 are synthetic resin molded bodies having fitting portions having a substantially C-shaped cross section at their tips and ends. The tensioning band 143 has one end attached to the mounting member 14.
The band body is fitted and attached to the engagement shaft part 124 of the tension adjustment arm 123 through the fitting part 4, and the band body is attached to the reel stand 60.
The other end is fitted and attached to the shaft portion 129 of the support member 130 via the fitting portion of the attachment member 144 .

On the other hand, as shown in FIG. 6, a drive gear 95 on the lower surface of the chassis 50 is supported, and a support shaft 145 is fixed to the left side of the four support shafts 93, and a dogleg-shaped arm 146 is fixed to the support shaft 145. is rotatably attached. Arm 1
46 has a pin 147 fixed to one end thereof so as to project downward, and a pin 148 fixed to the other end thereof so as to project upward. The pin 147 is inserted into the cam portion 97 of the drive gear 95, and the pin 148 projects upward from the chassis 50 through a long hole 149 formed in the chassis 50.

When the drive gear 95 rotates, the arm +46 rotates as the pin 147 is guided by the cam portion 97, causing the pin 148 to move left and right within the elongated hole 149. Here, the pin 148 acts to regulate the position of the free end of the tension adjustment arm 123, as will be described later.

1-1, Brake mechanism (Fig. 1 (A) to (c), 2nd
4 and 6) 152 is a brake mechanism. This brake mechanism 152
The reel stand 6 is set according to each mode of this tape recorder.
0.61, and is configured as follows.

As shown in FIGS. 3 and 4, support shafts 153 and 154 are fixed to the front end of the chassis 50. As shown in FIGS. As shown in FIG. 1(A), these support shafts 153, 154 are located outside the outer peripheral surface of the reel stand 601, 61 and outside the reel stand 601.
An imaginary line 1 approximately parallel to the direction between the support axes 58 and 59 of 0.61
55 at regular intervals. A first brake lever 156 is rotatably supported on these support shafts 153 and 154, and a second brake lever 157 is rotatably supported on the support shaft 154.

The structure of the brake levers 156, 157 and their mounting state are shown in FIG. 1(A) and FIG. 2.

As shown in these figures, the brake lever 156 is
It has a rod portion 158, a second rod portion 159, and a protruding portion 160, and the base end portion 161 of each of these portions is rotatably supported by a support shaft 153. The rod portion 158 is the support shaft 153
The support shaft 154 extends from the support shaft 154, and an inclined surface 163 is formed on the lower side of the support shaft 154 in continuation with a linearly extending surface 162, and a pin 164 is fixed to the lower surface of the tip thereof.

The rod portion 159 extends from the support shaft 153 in a direction between the reel stands 60 and 61, and a brake pad +65 is fixed to the tip end and the side surface thereof. The protrusion 160 has a proximal end 161
The engagement recess 166 extends forward from the
is formed. A hole 167 is formed in the proximal end tet, and a support shaft 153 is located within the assimilation 167. When the brake lever 156 is rotated, the brake pad 165 fixed to the rod portion 159 comes into contact with and separates from the outer peripheral surface of the reel stand 60.

The brake lever 157 has a third rod portion 170, a fourth rod portion 171, and a protruding portion 172, and the base end portion 173 of each of these portions is rotatable about the support shaft 154 and rotates within a certain range in the direction of the imaginary line 155. It is supported so that it can move freely. Rod part 1
70 extends from the support shaft 154 toward the support shaft 153, and has an inclined surface 174, a protrusion 175, and an elongated hole 1 at its tip.
76 is formed. Here, a pin 164 fixed to the rod portion 158 of the brake lever 156 is inserted into the elongated hole 176. The rod portion 171 is the support shaft 154
It extends in the direction between the reel stands 60 and 61, and a brake pad 177 is fixed to the tip and side surfaces thereof.

The protrusion 172 extends forward from the base end 173, and has an engagement recess 178 formed at its distal end. A long hole 179 is formed in the base end portion 173.
A support shaft 154 is located within. When the brake lever 157 rotates or moves in the direction of the imaginary line 155, the brake pad 177 fixed to the rod portion 171 comes into contact with and separates from the outer peripheral surface of the reel stand 61.

A spring 180 (
A biasing member) is tensioned, and the brake lever 156 is biased counterclockwise by this spring 180.
The brake lever 157 is biased clockwise and leftward.

A slide plate 181 is disposed on the upper surface of the chassis 50 below the brake levers 156 and 157. The slide plate 181 has elongated holes 1B2, 183 and 184 formed therein, and a pin 185 is fixed thereto. Long hole 18 above
2, the base end 161 of the brake lever 156 is located, and the pin 18 fixed to the chassis 50 is located in the elongated hole 183.
6 is located. Based on this configuration, the slide plate 181
The base end portion 1611 is movable in the left and right direction (in the direction of the virtual line 155) within a certain range using the pin 186 as a guide. In the state shown in FIG. 1(A), the pin 185 resists the biasing force of the spring 180 to
2 and a protrusion 175 formed on the rod portion 170.

On the other hand, as shown in FIG. 6, a support shaft 189 is fixed to the front left corner of the lower surface of the chassis 50.
．． A brake gear 190 that meshes with the drive gear 95 is rotatably attached to the. Brake gear 190
Grooved cam 19 with guide parts 191 and 192 on the upper surface of
3 is formed. Further, a support shaft 194 is fixed near the support shaft 189 on the lower surface of the chassis 50, and one end portion of an arm 195 is rotatably attached to the support shaft 194. A pin 196 that projects into the grooved cam 193 is fixed to the arm 195 at its intermediate portion, and a pin 197 that projects upward is fixed to the other end. The pin 197 is inserted into the chassis 50 through a long hole 198 formed in the chassis 50, as shown in FIGS. 1(A) and 2.
It protrudes upward and is inserted into the elongated hole 184 of the slide plate tSt.

In the above configuration, when the brake gear 190 rotates, the pin 196 travels within the grooved cam 193. Here, the arm 195 is stopped and positioned at the position shown in FIG. 6 when the pin 196 travels inside the guide part 191,
When the pin 196 travels within the guide portion 192, it rotates clockwise and counterclockwise. When this arm 195 rotates, the pin 197 shown in FIG. 1(A) rotates, the slide plate +81 moves in the left-right direction, and the pin 185 moves in the left-right direction. When the pin 185 moves in the left and right direction, the brake levers 156,1 are driven by this pin 185.
57 rotates or moves in the left and right direction.

FIG. 1(A) shows a state in which the pin 185 is located at the rightmost position. In this state, the brake pad 165 of the brake lever 156 is located apart from the outer peripheral surface of the reel stand 60, and the The brake pad 177 is in pressure contact with the outer peripheral surface of the reel stand 61. Therefore, at this time, the reel stand 60 is placed in the released state, and the reel stand 61
is placed in a state where it cannot rotate due to the application of the brake. From this state, when the pin 185 moves slightly to the left as shown in FIG. 1(B), the protrusion 175
Following this, the brake lever 157 moves slightly to the left, and the brake pad 177 separates from the outer peripheral surface of the reel stand 61. Therefore, at this time, the reel stand 60.61
are placed in a released state where the brakes are not applied. Then, when the pin 185 further moves to the left from this state as shown in FIG. Surface 174 is play sharp/
(It matches the slope 163 of -156.

Here, the brake levers 156, 157 are connected to the inclined surface 163.
．． 174 in sliding contact with the bottle 185, the spring 180
It rotates due to the biasing force of. In this case, the brake lever 156 rotates counterclockwise, and the brake lever 157 rotates clockwise.

As a result, the brake pad 165 of the brake lever 156 comes into pressure contact with the outer peripheral surface of the reel stand 60, and the brake pad 177 of the brake lever 157 comes into pressure contact with the outer peripheral surface of the reel stand 61. Therefore, at this time, the reel stand 60.6
1, the brakes are applied to both of these reel stands 60.
61 is placed in a non-rotatable state.

As described above, in this brake mechanism 152, the reel stand 6
1 (the state shown in Fig. 1 (A)), and a state where both reel stands 60 and 61 are released (the state shown in Fig. 1 (A)).
The state shown in FIG. 1(B)), the state in which the brakes are applied to both reel stands 60 and 61 (the state shown in FIG. 1(C)),
Three states can be obtained. These three states are obtained by rotationally displacing the brake gear 190 in accordance with each mode of the tape recorder.

(2) Other configurations (FIGS. 3 and 4) Tape cassette guide bins 300 and 301 are erected at the right rear of the support shaft 122 that supports the tension adjustment arm 123 and in front of the capstan 79. These tape cassette guide pins 300, 301 position the tape cassette 67 when it is loaded into the apparatus.

Furthermore, fixed guide posts 302 and 303 are erected at the rear left end portion of the top surface of the chassis 50 so as to sandwich the elongated hole 149.

Further, in FIG. 4, a tape cassette 67 has a magnetic tape 90 built into a cassette case 304. The head drum 70 is mounted on the front side of the cassette case 304, that is, when it is attached to the tape recorder.
There is a recess 30 for pulling out the magnetic tape 90 on the side facing the
．． 5 is formed. This recess 305 is covered by a lid body (not shown) that can be opened and closed. In addition, two tape reels (not shown), namely a supply tape reel and a take-up tape reel, are rotatably arranged in the cassette case 304, and the magnetic tape 90 is connected to the tape outlet 306 from the supply tape reel side. The tape passes through the concave portion 305, passes through the tape outlet 307, and is wound onto the take-up tape reel.

Further, the lower surface of the cassette case 304 is formed with positioning holes (not shown) into which tape cassette guide pins 300 and 301 of a tape recorder are inserted.

J. Operation of tape recorder (Figs. 1 (A) to (C), Figs. 4, 6, and 7) In the tape recorder configured as described above, recording of signals by the tape cassette 67, The playback operation is performed as follows.

First, when the tape cassette 67 is installed in the tape recorder, the tape cassette 67 is transferred by a tape cassette loading mechanism (not shown), and the tape cassette 67 is loaded into the position shown in FIG. The reel is now ready to be driven by the reel stand 60,61.

When the loading of the tape cassette 67 is completed as described above, the tape loading boss 86A
, 86B, inclined guide posts 87A, 87B, pinch roller 113, and moving guide posts 115 are located in the recess 305 of the tape cassette 67 as shown in FIG. 90
It is located inside. Also, at this time, the brake mechanism 1
52 is the brake lever 1 as shown in FIG. 1(A).
57 brake pads 177 press against the outer peripheral surface of the reel stand 61, thereby restraining the reel stand 61 from rotating.

When loading of the tape cassette 67 is completed, the sixth
When the loading motor IQ6 shown in the figure rotates, the drive gears 95 and 96 rotate in the loading direction.

When the drive gears 95, 96 rotate in the above direction, the moving blocks 84, 85 move rearward, and the tape loading posts 86A, 86B wind the magnetic tape 90 around the head drum 70 while drawing it rearward.

At this time, the pinch roller arm 110 is biased clockwise by the spring 119 with its rotating end engaged with the moving block 85, so that it follows the movement of the moving block 85 and rotates clockwise. , pinch roller tta
move it toward the capstan 79. When the pinch roller arm 110 rotates in the above direction, the movable guide post 115 is guided by the groove cam 116 and moves to the right rear while the guide post arm l14 rotates, and this movable guide post 115 is moved toward the pinch roller 113. First, the magnetic tape 90 is moved toward the right rear capstan 79. The pinch roller arm 110 temporarily stops when its rotating end leaves the moving block 85, and at this time the pin 117 fixed to the auxiliary arm 111 comes into contact with a cam portion 98 formed on the drive gear 96.

Furthermore, when the movable block 84 moves backward, the tension adjustment arm 123, which is biased counterclockwise by the spring 128 with the tension adjustment pin 125 engaged with the movable block 84, moves the movable block 84. It rotates in the counterclockwise direction following , and its rotating end comes into contact with the pin 148 located at the right end of the elongated hole 149 and stops at that position.

The moving block 84.85 moving backwards finally has the positioning pin 88.89 in the groove 56 of the positioning plate 57.57.
．． 56, it stops moving and is positioned at the loading completion position.

On the other hand, when the mobile pro, ivy 84, 85 moves as described above, the auxiliary arm 11 moves as the drive gear 96 rotates.
The pin 117 fixed to 1 is guided by the cam part 98, thereby causing the pinch roller arm 110 to move to the auxiliary arm +1.
1, the pinch roller 113 approaches the capstan 79, and the movable guide post 115 moves to the right.

Then, just before the moving blocks 84 and 85 reach the loading completion position, the brake lever 1 of the brake mechanism 152
57 rotates to release the restraint of the reel stand 61, and the first
The state will be as shown in Figure (B). In this state, the tape recorder performs FF-R fast forwarding, rewinding, etc. of the tape.
It corresponds to WD mode. In this FF-RWD mode, the pinch roller 113 is located at a certain distance from the capstan 79, and the tension adjustment pin 125 is located at a certain distance from the magnetic tape 90. .

In normal tape loading operation, this FF/RWD
After passing through the state corresponding to the mode, the loading motor 106 continues to rotate, and the drive gears 95 and 96 further rotate by a certain amount. When the drive gears 95 and 96 have rotated by a predetermined amount, the brake lever 156 of the brake mechanism 152,
157 rotates so as to restrain the reel stands 60 and 61 together, resulting in the state shown in FIG. 1(C). This corresponds to the tape recorder's stop mode, and the loading operation is now complete. In addition, in the operation from the FF/RWD mode to the stop mode, the state of the pinch roller 113 does not change to the same extent, and the tension adjustment pin 1
25 moves only slightly in the direction away from the magnetic tape 90.

In this stop mode, when a signal recording or reproduction command is given, the loading motor 106 further rotates by a certain amount, and the drive gears 95 and 96 rotate by a certain amount in the loading direction. When the drive gear 95 rotates as described above, the cam portion 97 formed on the drive gear 95 guides the pin 147 fixed to the arm 146, which causes the arm 146 to rotate counterclockwise. Arm 146
The pin 14B fixed to moves to the left end within the elongated hole 149. When pin 14B moves as described above, this pin 1
The tension adjustment pin 123, which was engaged with the pin 48, is rotated a certain amount counterclockwise by the biasing force of the spring 12B, and the tension adjustment pin 123 is thereby rotated by a certain amount in the counterclockwise direction. 25 moves to the left by a certain amount.

Here, the tension adjustment pin 125 pulls the magnetic tape 90 between the fixed guide posts 302 and 303 in a dogleg shape,
A predetermined tension is applied to the magnetic tape 90.

Further, when the drive gear 96 rotates as described above, the cam portion 98 formed on the drive gear 96 moves to the auxiliary arm 111.
As a result, the pinch roller arm 1!0 rotates clockwise together with the auxiliary arm 111 by the biasing force of the spring 119, and the pinch roller 113 rotates the magnetic tape 90 inside. Press it against the capstan 79 while keeping it in place.

When the drive gears 95, 96 rotate as described above, the brake mechanism 152 releases the restraint on both the reel stands 60, 61 again, resulting in the state shown in FIG. 1(B).

This state corresponds to the play mode shown in FIG. In this state, the magnetic tape 90 of the tape cassette 67 is pulled out from the left end of the cassette case 304, contacts the fixed guide post 302, the tension adjustment pin 125, and the fixed guide post 303, and extends rearward, and then the tape loading post 86A+ , :@ After being attached and folded back, it contacts the inclined guide post 87A and is wound around the head drum 70. After being wrapped around the head drum 70, it contacts the inclined guide post 87B, is wrapped around the tape loading post 86B, is folded back, and then passes between the capstan 79 and the pinch roller 113, and then is attached to the moving guide post 115. They are introduced into the right end of the cassette case 304 in contact with each other.

Then, in the above state, the reel stand driving motor 68, the capstan driving motor 80, and the head drum 70 are driven, and the capstan 79 and the pinch roller 113 cause the magnetic tape 90 to run at a constant speed.
When the magnetic tape 90 is driven, the magnetic tape 90 is wound onto the take-up reel, and the upper drum 71 of the head drum 70 rotates to record or reproduce signals.

During the above signal recording or reproducing operation, the tension of the magnetic tape 90 is kept constant by the tape tension [1121]. That is, when the tension applied to the magnetic tape 90 is weaker or stronger than the specified tension, the tension adjustment bin 125 moves in the left-right direction, which causes the tension adjustment arm 123 to rotate and the reel stand 6 to rotate.
Band for drum section 64 of 0! The pressure contact strength of the magnetic tape 43 is adjusted, thereby the load on the reel stand 60 is adjusted, and the tension of the magnetic tape 90 is set to a specified tension.

Also, when a tape fast forward or rewind command is issued from the stop mode, the loading motor 106
rotates a predetermined amount in the opposite direction, which causes the drive gear 95.9
6 also returns by a predetermined amount in the opposite direction, and the brake mechanism 152 enters the state corresponding to the FF-RWD mode as shown in FIG. 1(B) described above.

"Effects of the Invention" According to the present invention, the mechanism for restraining one or both of the two reel stands according to each mode of the tape recorder is provided in the first. Since it consists of a second brake lever, a biasing member that biases these levers in a predetermined direction, and a pin that operates the lever, the overall configuration of the brake mechanism is extremely simple and the mechanism can be manufactured at low cost. You can get the effects that you can.

[Brief explanation of the drawing]

Figures 1 to 7 show the brake mechanism (=
1 (A) to (C) are explanatory views of the operation of the brake mechanism, FIG. 2 is an exploded perspective view of the brake mechanism, and FIG. 3 is an exploded perspective view of the brake mechanism. 4 is a plan view of the tape recorder, FIG. 5 is a bottom view of the tape recorder, FIG. 6 is a plan view of the drive system of the tape recorder, and FIG. 7 is a plan view of the tape loading mechanism in a state where loading is completed. be. FIG. 8 is a plan view of a conventional brake mechanism. 58.59... Support shaft, 60... Supply side reel stand,
6I... Winding side reel stand, 90... Magnetic tape, 1
52... Brake mechanism, 153... First support shaft,
154...Second support shaft, I55...Virtual line, 15
6... First brake lever, 157... Second brake lever, I58... First rod portion, 159...
Second rod portion, 170... Third rod portion, 171... Fourth rod portion, 180... Biasing member, 185... Bin.

Claims (1)

[Claims] The tape drive device is attached to a tape drive device that runs a magnetic tape using a supply reel stand and a take-up reel stand, and one or both of the two reel stands can be set to stop rotating depending on a predetermined mode. a brake mechanism that is capable of restraining the reel, and is arranged at a constant interval on an imaginary line that is outside the outer circumferential surface of the two reel stands and is substantially parallel to the direction between the support axes of the two reel stands. 1. a second support shaft; a first rod portion rotatably supported by the first support shaft and extending from the first support shaft in the direction of the second support shaft;
a first brake lever that extends from the first support shaft in a direction between the two reel stands, and has a second rod part that comes into contact with and separates from the outer peripheral surface of one of the reel stands as the lever rotates; , a third rod part rotatably supported on the second support shaft and movable within a certain range in the direction of the virtual line, and extending from the second support shaft in the direction of the first support shaft; A fourth rod extends from the support shaft of No. 2 in the direction between the two reel stands, and comes into contact with and separates from the outer circumferential surface of the other reel stand as the rod rotates or moves in the direction of the imaginary line. Second
a brake lever, the first brake lever is biased in a direction in which the second rod portion comes into contact with the outer peripheral surface of the one reel stand, and the second brake lever is pressed against the fourth rod portion. a biasing member that biases the second brake lever in the direction of contacting the outer peripheral surface of the other reel stand and biases the second brake lever in the direction of the first support shaft; and a biasing member that resists the biasing force of the biasing member. and a pin that engages with the first and third rod portions, and by moving the pin, the first brake lever is rotated as a result of the pin, and the second brake lever is rotated by the pin. A brake mechanism for a tape drive device, characterized in that the brake lever is rotated or moved in the direction of the virtual line.