JPS63195853A - Tape driver - Google Patents

Abstract

PURPOSE:To utilize a driving gear for many purposes by rotating two driving gears in a loading direction, and after moving a tape loading post up to a loading completing position, rotating both the driving gears in the loading direction. CONSTITUTION:When a loading motor is positively rotated, a tape loading gear 248 is rotated in an arrow A direction through a worm 244 and an intermediate gear 249 and a tape cassette loading gear 250 are rotated in an arrow A direction. Consequently, a slider 87 whose rack gear 89 is engaged with the gear 250 is moved backward and the loading of a tape cassette is started. When a pin 264 reaches the terminal end of a guide part 255, the loading of the tape cassette is completed. When the pin 264 travels in a guide part 256, a lever 261 is rotated in the counterclockwise direction and an engaging part 262 presses an engaging wall part 225, so that a driving gear 210 is slightly rotated in the loading direction and the leading tooth of a gear part 212 is engaged with a small diameter gear 252 of the gear 248.

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention records and reproduces signals by pulling out a magnetic tape from a tape cassette and winding this magnetic tape around a head drum and running it. The present invention relates to a tape drive device for a tape recorder.

"Prior Art" Tape recorders such as video tape recorders (VTRs) and digital audio tape recorders (R-DATs) that use rotating heads pull out magnetic tape from a tape cassette loaded in the device, and transfer the magnetic tape to a head drum. It is configured to be wound around a (rotating head) and run.

-a. In such a tape recorder, a member called a tape loading post is positioned inside the magnetic tape located on the front side of the tape cassette when the tape is not loaded, and the tape loading post is moved when the tape is loaded. The magnetic tape is pulled out from the tape cassette and wound around the head drum, and members such as pinch rollers are moved to predetermined positions in synchronization with this operation. Therefore, such a tape recorder requires a tape drive device that includes a drive mechanism that moves the tape loading post and a drive mechanism that moves members such as the pinch roller.

Therefore, in the tape drive device of the tape recorder as described above, the drive mechanism for moving the tape loading post and the drive mechanism for moving the pinch roller etc. are arranged as rationally as possible, and these drive mechanisms are simplified. There is a desire to reduce weight and size. However, there are only a few conventionally provided tape drives of this type that meet the above requirements.

14 to 16 are diagrams showing an example of a conventionally provided tape drive device (Japanese Patent Application Laid-Open No. 61-202362).

In the figure, reference numeral I denotes a mechanical chassis, and this mechanical chassis I has an opening 2 and a guide elongated hole 3.4 formed therein. A reel stand 6 on the supply side and a reel stand 7 on the take-up side are arranged within the opening 2. A head drum 9 is attached between the guide slots 3 and 4 of the mechanical chassis l. The moving block 10111 is attached to the guide slot 3.4, and the moving block 0.11 is attached to the guide slot 3,
You can move within 4. These moving blocks 1O1ll have tape loading posts 12.1.
3 is fixed.

Loading rings 14 and 15 are rotatably disposed on the lower surface side of the mechanical chassis l so as to surround the head drum 9. These loading rings 14, 15 are adapted to be rotated by a loading motor 16. In this case, the loading rings 14, 15 are rotated in opposite directions via the gear group 17.

The loading ring 14 and the moving block 11 are connected by a connecting arm 18, and the loading ring 15 and the moving block 10 are connected by a connecting arm 19. A pinch roller arm presser 20 is supported on the loading ring 14.
0 supports a moving guide post suppressor 21.

Also, mechanical chassis! A pinch roller arm 23 is rotatably attached to a support shaft 22 fixed to the
A pinch roller 25 is attached to the free end of the pinch roller arm 23 via a support shaft 24. Further, a support arm 27 is rotatably attached to a support shaft 26 fixed to the mechanical chassis l, and a moving guide post 28 is attached to the free end of the support arm 27.

In the figure, 29 is a capstan, 30 is a tape cassette, and 31 is a magnetic tape.

A tape cassette 30 is loaded into the above tape recorder at the position shown in the figure. Figure 14 shows tape cassette 30
This shows a non-loading state before pulling out the magnetic tape 31 from the tape loading post 1.
2, 13, the pinch roller 25, and the moving guide post 28 are located inside the magnetic tape 31 in the tape cassette 30. Here, when the loading motor 16 is rotated, the loading ring 14 is rotated counterclockwise and the loading ring 15 is rotated clockwise. Along with this, the moving block 10.11 and the tape loading post 12.13 are guided by the guide slots 3 and 4 and moved rearward (above the plane of the paper). Loading ring 14
When rotated by a certain angle, the presser 20 comes into contact with the support shaft 24 and the presser 21 comes into contact with the moving guide post 28, whereby the pinch roller 25 and the moving guide post 28 move the pinch roller arm 23 and the support arm 27. Rotate clockwise and backward. When the tape loading posts 12, 13, pinch roller 25, and moving guide post 28 move rearward, the magnetic tape 3I is pulled out from the tape cassette 30 by these members, and the magnetic tape 31 is wound around the head drum 9. Also, the pinch roller 25 presses the magnetic tape 31 against the capstan 29 here. FIG. 15 shows a state in which loading of the magnetic tape 31 is completed. If a play command is given to the apparatus in this state, the capstan 29 and head drum 9 rotate to perform recording and reproduction.

By the way, the above-described tape drive device uses the loading rings 14 and 15 to drive the tape loading posts 12 and 13, the pinch roller 25, and the moving guide post 28. Therefore, in this drive device, the loading rings 14, 15 have to surround the head drum 9, which cannot be said to be a rational configuration in terms of space. The drawback was that it could not be done.

Therefore, as a conventional tape drive device which eliminates the above-mentioned drawbacks, the one shown in FIG. 17 (Japanese Unexamined Patent Publication No. 147836/1983) has been provided.

FIG. 17 is a view of the main parts of the tape recorder viewed from the bottom, and in this figure, reference numeral 40 is a board, and 41 is a board 40.
This is the head drum located above.

The board 40 has guide grooves 42 on both sides of the head drum 41.
．． 43 is formed, and a tape pull-out member 46.47 provided with a tape loading post 44.45 is attached to the guide groove 42.43. In addition, the board 4
Two drive gears 48, 49 whose teeth are meshed with each other are supported on the lower surface of the gear 1 via support shafts 50, 51. The drive gear 48.49 has a protrusion 52.53 on a part thereof.
is formed. Further, a small diameter gear 54 is integrally fixed to the drive gear 49. The protrusion 52 and the tape pull-out member 46 are connected by a link 55, and the protrusion 53 and the tape pull-out member 47 are connected by a link 56. Further, a geared arm 58 is attached to the lower surface of the board 40 via a support shaft 57.
The gear portion 58A of No. 8 meshes with the gear 54.

Also, in the figure, 59 is a capstan, 60 is a pinch roller,
62 is a loading motor. The rotational force of the motor 62 is transmitted to the arm 58 via a rotating body 63, a cam 64, and a fan-shaped gear 65, and the driving force of the cam 64 is transmitted to the pinch roller 6 via a rod 66 and a link mechanism 67.
0.

FIG. 17 shows a non-loading state before the magnetic tape (none of which is shown) is pulled out from the tape cassette, and in this state the tape loading posts 44 and 45 are located inside the magnetic tape in the tape cassette. . When the loading motor is rotated here, the arm 58 rotates in the direction of the arrow, the drive gear 49 rotates counterclockwise, and the drive gear 48 rotates clockwise. This causes the projection 52.53 to move the tape withdrawal member 46.47 rearwardly via the link 55.56. Here, the tape loading post 44 , 45 pulls out the magnetic tape from within the tape cassette and winds the magnetic tape around the head drum 41 .

Also, the pinch roller 60 presses the magnetic tape against the capstan. In this way, recording and reproduction of signals becomes possible.

According to the above-described tape drive device, the drive mechanism for the tape loading post can be integrated to the side of the head driver 11, so that the device can be made simpler, lighter, and smaller.

"Problems to be Solved by the Invention" By the way, in the tape drive device as shown in FIG. mode) and a state in which the pinch roller is further pressed against the capstan side (play mode). In such a device,
When changing from the play mode to the stop mode or vice versa, it is conceivable to drive the pinch roller by the drive mechanism of the tape loading post, and in this case, the structure of the apparatus can be simplified. However, in the configuration of the apparatus shown in FIG. 17, it is impossible to directly drive the pinch roller with the drive mechanism of the tape loading post (drive gears 48, 49, gear 51, geared arm 58, fan-shaped gear 65). .

That is, in the above-mentioned device, in order to rotate the drive gears 48 and 49, the geared arm 58 must be arranged so as to extend from the teeth of the gear 51 in front of the gear. In this configuration, the geared arm 58 can only be rotated left and right, and the range of movement of the geared arm 58 is extremely limited. Furthermore, since the drive gears 48 and 49 are also meshed with the geared arm 58, its rotation range is limited. Furthermore, these gears 48.4
Since protrusions 52 and 53 are formed on each of the protrusions 9, it is impossible to rotate more than a semicircle in terms of space. However, in the above configuration, the drive gears 48, 49,
The rotation range of the geared arm 58 is limited, and the drive gears 48, 49 and the geared arm 58 cannot be further rotated after the tape loading post reaches the loading completion position. Therefore, with the above configuration, the pinch roller cannot be driven by the drive mechanism of the tape loading post.

The present invention deals with the problem that in the tape drive device described above, the drive mechanism of the tape loading post cannot be used for other purposes.

"Means for Solving the Problems" This invention provides a head drum provided with a magnetic head,
Two tape loading posts supported so as to be movable between a non-loading position and a loading completion position, each having a long hole extending in the circumferential direction, and teeth formed on the respective circumferential surfaces mesh with each other. 11th
a second drive gear, a drive source for rotating these eleventh second drive gears, a pin that engages with the elongated hole of the first drive gear at one end, and a pin that engages with the long hole of the first drive gear, and the other end of the drive source that rotates the eleventh drive gear; a first loading post link connected to one of the loading posts, a pin at one end that engages with the elongated hole of the second drive gear, and the other end of which is connected to the other one of the tape loading posts. and a pin provided on the first loading post link so that the tape loading post connected to the first loading post link is directed toward the loading completion position. a first biasing member that biases; and a second biasing member that biases the
a second biasing member that biases a pin provided on the loading post link so that the tape loading post connected to the second loading post link moves toward the loading completion position; 1. By rotating the second drive gear, the two tape loading posts are moved from the non-loading position to the loading completion position via the eleventh second loading post link, thereby causing the two tape loading posts to move from the non-loading position to the loading completion position. A tape drive device which pulls out a magnetic tape in a tape cassette with a post and wraps the magnetic tape around the head drum at a predetermined angle, the eleventh and second drive gears being rotated in a loading direction. After each of the tape loading posts has reached the loading completion position, the eleventh and second drive gears can be further rotated in the loading direction within a range in which each of the pins can move within the elongated hole. It is characterized by:

"Example" Examples of the present invention will be described below with reference to FIGS. 1 to 13 (A).
This will be explained with reference to (D).

1 to 13(A) to 13(D) show the structure and operation of a tape recorder equipped with a tape drive device according to the present invention. The explanation will be divided into the following sections regarding the configuration and operation of the tape recorder.

A. Tape cassette loading mechanism (Figures 2 to 4) B. Chassis (Figures 5 to 7) C. Reel stand (Figures 5 to 7) D. Head drum (Figures 5 to 7) (Fig. 7) E, Capstan (Fig. 1, Fig. 5 to Fig. 7 F, Tape loading mechanism F-1, Moving block (Fig. 1, Fig. 5 to Fig. 8) F-2, Drive gear ( (Fig. 1, Fig. 7) G. Loading switching mechanism (Fig. 1, Fig. 7) H. Operation of loading switching mechanism (Fig. 12 (A) to (C)) ■. Binge roller (Fig. 5, Fig. 7) (Fig. 6, Fig. 9) J, tape tension mechanism (Fig. 1, Fig. 6, Fig. 10, Fig. 11)
(Figures), brake mechanism (Figures 1, 5 to 7, L, other configurations (Figures 5, 6), tape recorder operation (Figures 2 to 4, Figures 6, Figure 9, Figure 12 (A) - (C), Figure 13 (A) -
(D)) A. Tape cassette loading mechanism (FIGS. 2 to 4) In the figure, 70 is a tape cassette loading mechanism. The tape cassette loading mechanism 70 includes various members for loading a tape cassette 72 attached to a frame 71 attached to a chassis 131 (details of which will be described later).

The frame body 71 is a mouth-shaped member in which a front wall portion 73 and side wall portions 74 and 75 are integrally formed. The side wall portions 74 and 75 each have an L-shaped holder kite hole 76 and 77 formed in the upper portion thereof, and the side wall portion 75 has an opening 78 in the lower portion thereof.
and slider guide holes 79 and 79 are formed.

=1 is also − A tape cassette holder 80 is supported by the frame body 71 . The tape cassette holder 80 includes a holder main body 81 that is formed by bending both sides of a substantially plate upward, and side plates 8 fixed to the inner surfaces of both side walls 82 of the holder main body 81.
3.83, pins 84.85 are fixed to the side walls 82.82, respectively, and tape cassette holders 86.86 are provided on the upper portions of the side plates 83.83.

This tape cassette holder 80 has pins 84 and 85 on both sides of the tape cassette holder 80, respectively.
It is supported by the frame 71 by being inserted into the frame 71. This tape cassette holder 80 moves horizontally when the pins 84.85 move through the horizontal portions 76A, 77A of the holder guide holes 76.77, and the pins 84-. 85 moves in the vertical direction when it moves through the vertical portions 76, B, and 77B of the guide holes 76 and 77.

Further, a slider 87 is supported on the outer side of the lower end of the side wall portion 75 . The slider 87 is a plate-shaped member, and rack gears 88 and 89 are formed on its upper and inner surfaces, respectively, and pins 90 and 90 are fixed to the inner surfaces. This slider 87 has a pin 90°90 inserted into the slider guide hole 79.79.
It is attached to the side wall part 75 by inserting it into the inside.

This slider 87 is movable along the hole 79.79 to the extent that the pin 90.90 can move within the hole 79.79.

Further, support shafts 91 and 92 are fixed to the outside of the side wall portion 75, and a rotating body 93 and a main gear 94 are attached to the support shaft 92.
However, the support shaft 91 has a gear 95 that meshes with the main gear 94.
is supported. A gear portion 96 is formed on a part of the outer peripheral surface of the rotating body 93, and the gear portion 96 and the main gear 94 mesh with the rack gear 88. Main gear 94 and rotating body 93 are configured to rotate integrally.

Swing bodies 97 and 98 are rotatably attached to the support shafts 91 and 92. The rocking bodies 97 and 98 have grooves 99 and 100.
with pins 84. in grooves 99.100, respectively. ? 5 is inserted into the support shafts 91 and 92. The rocking body 97 is configured to rotate integrally with the gear 95. A pin 101 is attached to the swinging body 97.
One end of the link 102 is rotatably attached via a pin 103, and the other end of the link 102 is rotatably attached to the swinging body 98 via a pin 103.

Thus, when the gear 95 rotates and the rocking body 97 rotates in one direction, the rocking body 98 also rotates in the same direction via the link 102.

The oscillating bodies 97 and 98 are also provided on the side wall 74 side with a structure that is symmetrical to the above, and when the gear 95 rotates, the oscillating bodies 97 and 98 provided on the side wall 74 side move in the same direction. It operates in the same manner as the above-mentioned rocking body via a driving force transmission mechanism having a gear 104 that meshes with gear 95.

Thus, the slider 87 is inserted into the slider guide hole 79.79.
When moving along the main gear 94, the gear 9
5 rotates. When the gear 95 rotates, the oscillator 97.9
8 rotates, pins 84.85 move into grooves 100.8.
The tape cassette holder 80 moves within the slider guide hole 76.77 while moving within the slider guide hole 76.77.

In the figure, 105 is a lid that opens and closes the opening 106 through which the tape cassette 72 is inserted and taken out. This lid body 1
05, the opening 10 is moved in conjunction with the movement of the rocking bodies 97 and 98.
6 to open and close.

B. Chassis (Figures 5 to 7) Reference numeral 131 is a chassis, and this chassis 131 has a front end portion (the direction toward the bottom of the page is the front side, the direction toward the top is the rear side, and the direction toward the left side is the front side). An opening 132 is formed on the left side (the direction toward the right is defined as the right side), and a head drum mounting hole 133 is formed on the rear end. Further, guide elongated holes 134 and 135 are formed in the chassis I3I so as to extend from the front of the head drum mounting hole 133 to both left and right sides of the same mounting hole 133. Guide long hole 1
A projecting wall 136 that projects upward is provided at the rear end of 34, 135.
, 136 are formed as outserts, and projecting walls 136.1 are formed at the edges of these guide slots 134, 135.
Similar to 3'6, there is a rail portion formed by outsert, and on the upper surface of the protruding wall 136, 136 there is a metal positioning plate 138, 1 having V-shaped grooves 137, 137 at the front end.
38 is fixed.

C. Reel stand (Figs. 5 to 7) Reel stand support shafts 141, 142 are provided upright on both left and right sides of the opening 132 on the upper surface of the chassis 131, and the reel stand support shafts 141, 141 are provided with reel stand support shafts 141, 142. Tables 143 and 144 are rotatably supported. The reel stand 143 is a reel stand on the supply side, and the reel stand 144 is a reel stand on the winding side. Gears 14 are provided on the outer peripheral surfaces of the reel stands 143 and 144.
5, 146 are formed, and a drum portion 1'47 used for applying tape tension, which will be described later, is formed on the lower surface side of the reel stand 143. In addition, the reel stand 143,
Reel engaging shafts 14-8 and 149 are located at the upper surface of the 144.
is provided. The reel engaging shafts 148 and 149 engage the tape reel in the tape cassette 72 to rotate it integrally.

On the other hand, a reel stand driving motor 150 is attached to the front end side of the opening 132 on the lower surface of the chassis 131.

A rotating shaft 151 of the motor 150 projects upward from the opening 132, and a gear 152 is fixed to the upper end of the rotating shaft 151. One end of a gear support plate 153 is attached around the rotating shaft +51 so as to be rotatable about the rotating shaft 151. A support shaft 154 is fixed to the upper surface of the other end of the gear support plate 153, and a gear 1 is attached to the support shaft 154.
A gear 155 that meshes with 52 is rotatably attached. The gear 155 meshes with the gear 146 of the reel stand +44 when the gear support plate 153 is rotated clockwise in FIG.
It meshes with the gear 145 of 43. The gear support plate 153 is oscillated in accordance with the rotational direction of the gear 152 in accordance with a predetermined tape running mode. Thus, if the motor 150 is rotated with the gear 155 meshed with the gear 145 or 146, the reel stand 143 or 144 will rotate via the gears 152 and 155.

D. Head drum (Figures 5 to 7) chassis 13
A head drum 158 is attached to the rear end of the head drum 1 . The head drum 158 includes an upper drum 159 and a middle drum 1.
60 and a lower drum 161. The upper drum 159 is provided with magnetic heads 162, 162 on its peripheral surface, and the upper drum 159 is rotatable relative to the middle drum +60. Middle drum 160 and lower drum 16
1 constitutes a drum motor 163, and the lower drum 1
61 is rotatable with respect to the middle drum 1606. The lower drum 161 is provided coaxially with the upper drum 159, and when the lower drum 161 rotates, the upper drum 159
rotates. The middle drum 160 has mounting walls 164 and 16.
5 is formed, and the mounting walls 164 and 165 are attached to a support base 166 formed as an outsert on the upper surface of the chassis 131.
．． The hemispherical protrusion 169 provided on the upper surface of the 8 support stand 16B attached to the upper surface of 167.168
As shown in the figure, it is engaged with four parts of the mounting wall portion 165 to determine the position for mounting the head drum. Here, the upper drum 159 and the middle drum 160 are connected to the chassis 131.
The lower drum 161 projects downward from the chassis 131 through the head drum attachment hole 133. The center axis of the entire head drum 158 is tilted to the left at a certain angle with respect to a vertical line perpendicular to the chassis 131.

E. Capstan (FIGS. 1, 5 to 7) A capstan 170 is provided on the right side of the guide elongated hole 135 on the upper surface of the chassis 131. A capstan support member 171 formed by cutting out the middle portion of a cylindrical body is erected on the chassis 131, and the capstan 170 is rotatably supported at the upper and lower ends of the capstan support member +71.

As shown in FIG. 5, this capstan 170 has an intermediate portion exposed to the outside through a cutout portion 172 of a capstan support member 171. A lower end of the capstan 170 projects below the chassis 131, and a flywheel 174 is fixed to the projecting end.

A capstan driving motor 175 is disposed at the rear end of the right corner of the upper surface of the chassis 131. The negative side of the motor 175 is fixed to a support shaft 176 rotatably supported by the chassis +31, and a rotary shaft +78 protruding downward from a hole 177 formed in the chassis 131 has a pulley 1.
79 is fixed. The lower end of the support shaft 176 protrudes below the support shaft 131, and a ring-shaped plate 180 is fixed to the protruding lower end. The plate body 180 has a retaining portion 181 in a part thereof, and the rotation shaft 17
They are arranged to surround 8. A pin 182 projecting upward is fixed to the end of the plate body 180 opposite to the side attached to the support shaft 176. pin +
One end of 82 is a long hole 18 formed in the chassis ljl.
3 and protrudes above the scissors +31, and the protruding upper end is fixed to a motor 175. Thus, the motor 175 and the plate 180 are connected to the pin 182.
within the range in which the support shaft +7 can move within the elongated hole 183.
It is rotatable around 6.

A timing belt 184 is wound around the flywheel 174 and pulley 179. In this case, gear-like unevenness is formed on the outer circumferential surfaces of the flywheel 174 and pulley 179 and on the inner surface of the timing belt 184 to prevent slippage between these members. Also,
A spring 185 is tensioned between the engaging portion 181 of the plate body 180 and the rear edge of the chassis 131 to apply a constant tension to the timing belt 184.

In the above configuration, when the motor 175 is rotated, its rotational force is applied to the pulley 179 and the timing belt 18.
4. Capstan 170 via flywheel 174
The capstan +70 rotates at a constant speed.

F. Tape loading mechanism (FIGS. 1, 5 to 9) 188 is a tape loading mechanism. The main components of this tape loading mechanism 18g 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.

F-1° Moving Block (Figures 1, 5 to 8) The guide slots 134, 135 of the chassis 131 have moving blocks 189, 190 movable along the guide slots 134, 135. is installed.

As shown in FIGS. 6 and 8, the moving block 89 is formed by forming a mounting wall portion 192 projecting upward at the front end of a main wall portion 191. As shown in FIGS. A positioning pin 193 is fixed to the main wall 191 so as to protrude in the vertical direction, and a cylindrical shaft 194 is fixed to the mounting wall 192 so as to protrude downward.

A support shaft 195 is inserted and fixed into the cylindrical shaft 194, and a tape a-ding post 196A is fixed to the support shaft 195 that projects upward from the mounting wall 192. Further, the mounting wall portion 192 includes an engagement wall portion 1 that protrudes forward.
97 and a protruding wall portion 198 that protrudes laterally, and an inclined guide post 199A is fixed to the protruding wall portion 198. The lower ends of the positioning pin 193, the cylindrical shaft 194, and the support shaft 195 protrude below the chassis 131 through the guide elongated hole 134. Here move block 1
89 is prevented from being pulled out upward by attaching a ring 200 to the lower end of the positioning pin 193 and attaching a loading post link (details will be described later) to the lower end of the cylindrical shaft 194.

The moving block 190 is also constructed in the same manner as the above-mentioned moving block 189, has the same members as above, and has the same structure as above and is attached to the guide elongated hole 135. That is, in the moving block 190,
A positioning pin 202 is fixed to the main wall 201, and a tape loading post 196B and an inclined guide post 199B are fixed to the mounting wall 203.
An engagement wall portion 204 is formed on the.

Therefore, the moving blocks 189 and 190 to which the above-mentioned members are attached are placed in the non-loading position shown in FIG.
The position where the tape rope tightening posts 196A, 196B and the inclined guide posts 199A, 199B are inside the magnetic tape of the tape cassette 72 loaded in the device) and the loading completion position (the moving block 189 shown in FIG. 6,
190 backward and positioning pins 1'93, 20
2 abuts the grooves 137, 137 of the positioning plates 138, 138) along the guide elongated holes 134, 135.

F-2, drive gear (Fig. 1, Fig. 7) A support shaft 20 is located approximately at the center of the lower surface of the chassis 131 in the longitudinal direction.
7 and 208 are fixed, and drive gears 209 and 210 (first and second drive gears) are rotatably supported on support shafts 207 and 208. The drive gears 209 and 210 have teeth 211 and 212 that mesh with each other.

A cam portion 213 is formed on the upper surface of the drive gear 209 (a surface facing the chassis 131), and a long hole 214 extending in the circumferential direction is formed in a portion near the peripheral edge. Cam part 21
3 consists of guide walls 215, 216 and guide walls 217.2+8 continuous to these guide walls.

A cam portion 219 is formed on the upper surface of the drive gear 21O, and a long hole 220 extending in the circumferential direction is formed in a portion near the peripheral edge. The cam part 219 is connected to the guide wall 221°222
It consists of Further, a notch 223 is formed at the peripheral edge of the drive gear 210, and a tongue-shaped wall 224 facing the notch 223 has an engaging wall 225 projecting upward.
is formed.

The drive gear 209 and moving block 189 are connected by a loading post link 228 (first loading post link), and the driving gear 210 and moving block 190 are connected by a loading post link 229 (second loading post link). has been done.

That is, the loading post link 228 disposed on the upper side of the drive gear 209 has a pin 230 at one end thereof.
is fixed, and the pin 230 is inserted into the elongated hole 214. The other end of the loading post link 228 is rotatably attached to the cylindrical shaft 194, as shown in FIGS. 1 and 8. A pin 231 is fixed to one end of the loading post link 229 arranged on the upper side of the drive gear 210, and the pin 231 is connected to the elongated hole 22.
It is inserted within 0. loading post link 22
The other end of 9 is a cylindrical shaft 2 fixed to a moving block 190.
32 so as to be rotatable. In addition, the long hole 21
Rings 233, 234 are fixed to the lower ends of the pins 230, 231 that protrude downward from the pins 230, 220, thereby preventing the pins 230, 231 from coming out of the elongated holes 214, 220.

A torsion spring 235 is mounted on the upper surface of the drive gear 209.
(first biasing member) is attached, and the spring 23
5 moves the pin 230 in the elongated hole 214 in a counterclockwise direction (this direction is the direction in which the drive gear 209 moves the tape loading post 196A toward the loading completion position, as will be made clear later in the description). It is energizing.

Therefore, the pin 230 is in pressure contact with one edge of the elongated hole 214. Further, a torsion spring 236 (second biasing member) is attached to the upper surface of the drive gear 210, and the spring 236 is attached to the pin 23 in the elongated hole 220.
1 in a clockwise direction (this direction means that the drive gear 210 is aligned with the tape loading post 1 as will become clear later in the description).
96B toward the loading completion position). Therefore, the pin 231 is in pressure contact with one edge of the elongated hole 220.

As shown in FIG. 7, an engagement protrusion 237 is formed on the lower surface of the drive gear 209, and a spring 239 is provided between the engagement protrusion 237 and a support shaft 238 formed on the lower surface of the chassis 131. is installed. spring 2
Reference numeral 39 biases the drive gear 209 in its circumferential direction to prevent backlash of the drive gears 209, 210.

When the moving blocks 189 and 190 are in the non-loading position and the drive gear 209 is rotated counterclockwise and the drive gear 210 is rotated clockwise (hereinafter referred to as loading direction), the loading post links 228 and 229 are rotated. Moving blocks 189, 190 through
moves toward the loading completion position. Also,
When the driving gear 209 is rotated clockwise and the driving gear 21O is rotated counterclockwise (hereinafter referred to as unloading direction) with the moving blocks 189 and 190 at the loading completion position, the loading post link 2
The moving blocks 189 and 190 are moved toward the non-loading position via 28 and 229.

G. Loading switching mechanism (FIGS. 1 and 7) In the drawings, 242 is a loading switching mechanism. The loading switching mechanism 242 is a mechanism that drives the tape cassette loading mechanism 70 and the tape loading mechanism 188 described above, and is configured as follows.

A loading motor 243 (drive source) is attached to the right corner of the front end of the lower surface of the chassis 131, and a worm 244 is fixed to the rotating shaft of the loading motor 243.

Further, support shafts 245, 246, 247 are fixed to the rear of the motor 243 on the bottom surface of the chassis 131, and the support shafts 245, 246, 247 include a tape loading gear 248, an intermediate gear 249°, and a tape cassette loading gear 250. is rotatably supported. The tape loading gear 248 is formed by forming a small diameter gear 252 coaxially on the upper surface of a large diameter gear 251 constituting a worm wheel. The intermediate gear 249 is the large diameter gear 25
A small-diameter gear 254 is formed coaxially on the lower surface of 3. A groove cam 259 having guide portions 255, 256, and 257 is formed on the upper surface of the tape cassette loading gear 250a.

The tape loading gear 248 has a large diameter gear 251 that meshes with the worm 244, and a small diameter gear 251 that meshes with the worm 244.
52 meshes with the large diameter gear 253 of the intermediate gear 249. In this case, the small diameter gear 252 faces the notch 223 of the drive gear 210 in FIG.
When the gear 0 is slightly rotated in the loading direction, it can mesh with the teeth 212 of the drive gear 210. A small diameter gear 254 of the intermediate gear 249 meshes with a tape cassette loading gear 250. The right end of the tape cassette loading gear 250 meshes with the rack gear 89 of the slider 87 through the opening 78 of the frame 71 shown in FIG.

In addition, the above gears 248 and 249 on the bottom surface of the chassis 131
, 250 is fixed to a support shaft 260, and an L-shaped lever 261 is rotatably supported on this support shaft 260. One end of the lever 261 is a retaining part 262
This engaging portion 262 is located on the upper surface side of the drive gear 210 and is placed in a position where it can come into contact with the engaging wall portion 225. A pin 26 is attached to the other end 263 of the lever 261.
4 is fixed, and this pin 264 is inserted into the groove cam 259 of the tape cassette loading gear 250.

H. Operation of loading switching mechanism (Fig. 1, Fig. 12 (
A) to (C) In this tape recorder, the tape cassette 72 is loaded and unloaded by moving the slider 87 back and forth, and the drive gear 210 (
209) rotates to load and unload the magnetic tape.

FIG. 12(A) shows a state in which each member of the loading switching mechanism 242 is in a standby position.

At this time, the small diameter gear 2 of the tape loading gear 248
52 faces into the notch 223 of the drive gear 210,
It does not mesh with the teeth 212 of the drive gear 210. Further, the pin 264 fixed to the lever 261 is attached to a grooved cam 259 formed on the tape cassette loading gear 250.
It is located within the guide portion 255 of , and also within the starting end of the guide portion 255 . In this state, the engaging portion 26 of the lever 261
2 is spaced apart from the engaging wall portion 225 of the drive gear 210 by a certain distance.

When the loading motor 243 is rotated forward, the tape loading gear 248 is connected to the tape loading gear 248 via the worm 244.
rotates in the direction of arrow A, and the intermediate gear 249 and tape cassette loading gear 250 rotate in the direction of arrow A.

When the tape cassette loading gear 250 rotates in the same direction, the slider 87 in which the rack gear 89 is engaged with the gear 250 moves rearward, and loading of the tape cassette 72 is started. Note that, at this time, the drive gear 210 does not rotate because its teeth 212 are not engaged with the tape loading gear 248.

Therefore, tape loading mechanism 188 is placed in a non-loading state. In this state, the pin 264 of the lever 261 runs within the guide portion 255 of the grooved cam 259. Then, as shown in FIG. 12(B), when the pin 264 reaches the end of the guide portion 255, the tape cassette 72
loading is completed.

The pin 264 then moves from FIG. 12(B) to FIG. 12(C).
When the pin 264 is guided by the guide portion 256 as shown in FIG. 2, the lever 261 rotates counterclockwise. When the lever 261 rotates in the same direction, the engagement portion 262 pushes the engagement wall portion 225, causing the drive gear 210 to rotate slightly in the loading direction (clockwise).
The leading tooth of the tooth portion 212 formed at 4 meshes with the small diameter gear 252 of the tape loading gear 248. The drive gear 210 is rotated in the loading direction by the small diameter gear 252, thereby loading the magnetic tape, and when this loading is completed, the rotation of the loading motor 243 is stopped. Note that during this time, the pin 264 runs within the guide portion 257. Furthermore, during this time, the slider 87 is moved backward by a certain distance because the tape cassette loading gear 250 is rotating.

In addition, in order to unload the magnetic tape and tape cassette from the above state, the loading motor 24
Rotate 3 in the opposite direction. In this way, the tape loading gear 248, intermediate gear 249, and tape cassette loading gear 250 rotate in the direction of arrow B. This causes the drive gear 210 to rotate in the unloading direction, thereby unloading the magnetic tape. In addition,
At this time, the slider 87 is moved forward. Then, in the reverse order of the above, the tooth portion 212 of the drive gear 210 and the small diameter gear 252
The unloading of the magnetic tape is completed when the mesh is disengaged from the tape cassette 72, and then the tape cassette 72 is unloaded, and when this unloading is completed, the rotation of the loading motor 243 is stopped.

(2) Pinch roller (Figures 5, 6, and 9) A support shaft 267 is fixed to the right end of the upper surface of the chassis 131, and a pinch roller arm 268 and one end of an auxiliary arm 269 are attached to this support shaft 267. The part is rotatably attached.

The pinch roller arm 268 is formed in an L-shape, and has an engaging protrusion 270 formed at one end thereof, and an engaging protrusion 270 formed at the other end that can freely engage with the engaging wall portion 204 of the movable block summer 90. An engagement wall portion 271 is formed. A support shaft 272 is fixed to the other end of the pinch roller arm 268, and a pinch roller 273 made of an elastic material such as rubber is rotatably supported on the support shaft 272. Support shaft 2
The lower end of 72 protrudes below the pinch roller arm 268, and the protruding end has a guide post arm 274.
One end is rotatably attached. A movable guide post 275 is fixed to the other end of the guide post arm 274. This moving guide post 275 is for guiding a magnetic tape as will be described later, and the portion that guides the magnetic tape is a groove 276. The lower end of the moving guide post 275 is connected to the guide post arm 274.
It protrudes downward, and its protruding end is connected to the chassis 131.
It is inserted into a groove cam 277 formed on the top surface. The grooved cam 277 is formed to escape a tape cassette guide pin 278 (details of which will be described later) provided upright on the chassis 131, and extends from the left side of the guide pin 278 to the right rear side of the guide pin 278. It is formed.

The auxiliary arm 269 has an engaging piece 279 that projects upwardly at the other end thereof, and a pin 280 that projects downwardly.
is fixed. The pin 280 projects downward from the chassis 131 through a long hole 28+ formed in the chassis 131, and its projecting end can engage with the cam portion 219 of the drive gear 210 shown in FIGS. 1 and 9. can. A spring 282 is wound around the support shaft 267, and one end of the spring 282 is engaged with the pin 280, and the other end is engaged with an engaging portion 283 formed on the front surface of the pinch roller arm 268. Based on this configuration, the pinch roller arm 268 is biased clockwise in FIG. is engaged with the rear end of the Engagement protrusion 27 of pinch roller arm 268
A spring 285 is stretched between the locking projection 284 formed on the chassis 131 and the pinch roller arm 268 and the auxiliary arm 269 clockwise.

In the above configuration, the pinch roller arm 268 has its engagement wall portion 271 engaged with the engagement wall portion 204 of the moving block 190 as shown in FIG. 6 during non-loading, and the moving block 190 is moved rearward. When it moves, it rotates clockwise following the moving block 190 due to the biasing force of the spring 285. At this time, the pinch roller 27
3 moves toward the capstan 170. Also,
At this time, the moving guide post 275 is guided by the groove cam 277 and moves to the right rear of the guide pin 278.

J. Tape tension mechanism (Fig. 1, Fig. 6, Fig. 10, Fig. 11) 287 is a tape tension mechanism. This tape tension mechanism 287 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 288 is fixed to the left end of the upper surface of the chassis 131, and one end of a tension adjustment arm 289 is rotatably attached to the support shaft 288. The tension adjustment arm 289 is formed in the shape of a fishhook, and an engaging protrusion 290 is formed at one end thereof, and a tension adjustment pin 291 is fixed to the other end.

Further, an engagement protrusion 292 is formed at one end of the tension adjustment arm 289, and a spring 294 is stretched between the engagement protrusion 292 and an engagement protrusion 293 formed on the chassis 131. . With this configuration, the tension adjustment arm 289 is biased counterclockwise.
Tension adjustment pin 291 when not loading
is engaged with the engagement wall portion 197 of the moving block +89.

Further, in front of the support shaft 288 of the chassis 131, a first
As shown in detail in FIG. 0 and FIG. 11, the offset adjusting member 295 and the fixing member 296 are removed (=1).

The offset adjustment member 295 has a main wall 299 formed at the upper end of a mounting shaft 298 having a center hole 297, an abbreviated elastic wall 300 formed at the peripheral edge of this main wall, and An engaging protrusion 301 is formed on the peripheral edge of the portion 300, and a shaft portion 3 is formed on the opposite side of the main wall portion 299 from the engaging protrusion 301.
02, and the above-mentioned parts are integrally molded from synthetic resin.

This offset adjustment member 295 has a mounting shaft portion 298.
is rotatably attached to a hole 303 formed in the chassis 131. The fixing member 296 forms a main wall portion 306 at the upper end of a mounting wall portion 305 having a center hole 304;
A concave portion 307, 307, etc. is formed on one side edge of the main wall portion 306, and the above-mentioned parts are integrally molded from synthetic resin. be. This fixing member 296 is attached to the mounting wall portion 305 of the yarn 13! is fixed within a hole 308 formed in the hole 308 . Here, the recesses 307, 307... are the engaging protrusions 3
The engagement protrusions 30 are arranged in a row on the rotation locus of the tip of 01.
1 is an arbitrary concave portion 30 while elastically deforming the elastic wall portion 300.
7. The offset adjusting member 295 and the fixing member 296 are obtained by outsert molding synthetic resin onto the chassis 131.

One end of a tensioning band 309 is fixed to the engagement protrusion 290 of the tension adjustment arm 289, and the middle part of the band 309 is connected to the drum part 1 of the reel stand 143.
47, and the other end is fixed to the shaft portion 302 of the offset adjustment member 295 via the attachment member 310.

On the other hand, as shown in FIG. 1, a support shaft 311 is fixed to the left side of the support shaft 207 on which the drive gear 209 is supported on the lower surface of the chassis 131. is rotatably attached. A pin 313 is fixed to one end of the arm 312 so as to project downward, and a pin 314 is fixed to the other end of the arm 312 so as to project upward. Pin 313 is drive gear 209
The pin 314 is inserted into the cam portion 213 of the chassis 131, and the pin 314 projects upward from the chassis 131 through a long hole 315 formed in the chassis 131.

When the drive gear 209 rotates, the arm 312 rotates as the pin 313 is guided by the cam portion 213, thereby moving the pin 314 left and right within the elongated hole 315.

Here, the pin 314 acts to regulate the position of the free end of the tension adjustment arm 289, as will be described later.

In the above configuration, the engagement protrusion 301 of the offset adjustment member 295 is engaged in a predetermined recess 307 of the fixing member 296. In this configuration, when the reel stand 143 is rotated and the tension adjustment arm 289 is rotated counterclockwise, the middle part of the band 309 comes into pressure contact with the drum part 147, and a brake is applied to the rotation of the reel stand 143. During operation of this tape recorder, the tension adjustment arm 28
9, when the tension adjustment pin 291 is moved according to the tension of the magnetic tape as described later, it is rotated counterclockwise as described above, and is rotated slightly clockwise.
The band 3 rotates counterclockwise to the reel stand 143.
Change the brake amount of 09.

Therefore, in the above configuration, the initial setting of the brake amount for the drum portion 147 and the adjustment of the brake amount when the band 309 is worn out can be performed as follows. That is, in order to adjust the amount of braking applied to the drum portion 147, a jig such as a pin is used to adjust the amount of braking applied to the engaging protrusion 3.
By operating 01, the offset adjustment member 295 is rotated, thereby moving the engagement protrusion 301 from the recess 301 with which it was previously engaged to another recess 301.

In this way, the position of the shaft portion 302 to which the other end of the band 309 is fixed changes, and the amount of braking of the band 309 relative to the drum portion 147 changes. In this way, the amount of braking can be adjusted by changing the position of the recess 307 with which the engagement protrusion 301 is engaged.

K. Brake mechanism (Figures 1, 5 to 7) 317 is a brake mechanism. This brake mechanism 317
reel stand 1 according to each mode of this tape recorder.
43 and 144 so as not to rotate, and is constructed as follows.

As shown in FIGS. 5 and 6, support shafts 318 and 319 are fixed to the front end of the chassis 131.
A first brake lever 320 is supported on the support shaft 319, and a second brake lever 321 is supported on the support shaft 319.

The brake lever 320 has a rod portion 322, 323 and a protruding portion 3.
24, and the base end of each of these parts is a support shaft 31.
It is rotatably supported by 8.

A brake pad 325 is fixed to the tip of the rod portion 322, and an inclined surface 326 is formed at the rear end of the rod portion 323. The brake lever 321 has a rod portion 327, 328 and a protruding portion 329, and a long hole 330 formed at the base end of each of these portions is supported by the support shaft 319 so as to be rotatable and movable in the left and right directions. There is. A brake pad 331 is fixed to the tip of the rod portion 327, and a protrusion 332 and an inclined surface 333 are formed at the tip of the rod portion 328. A spring 3 is installed between the protrusion 324 of the brake lever 320 and the protrusion 329 of the brake lever 321.
34 is tensioned, the brake lever 320 is biased counterclockwise, and the brake lever 321 is biased clockwise and leftward.

Brake lever 320.321 on the top of chassis 131
A slide plate 335 is disposed below so as to be movable in the left and right direction. The slide plate 335 has a pin 336 formed in its center portion that engages with the rear end surface of the rod portion 323 and the protrusion portion 332, and has a long hole 337 formed in its rear end portion.

On the other hand, as shown in FIG. 1, the aforementioned support shaft 238 is fixed to the front left corner of the lower surface of the chassis 131, and the brake gear 3 that meshes with the drive gear 209 is attached to the support shaft 238.
4.1 is rotatably attached. A grooved cam 344 having guide portions 341 and 343 is formed on the upper surface of the brake gear 341. Further, a support shaft 345 is fixed to the lower surface of the chassis 131 near the support shaft 238, and one end of an arm 346 is rotatably attached to the support shaft 345. A pin 347 that projects into the grooved cam 344 is fixed to the arm 346 at its intermediate portion, and a pin 348 that projects upward is fixed to the other end. Pin 348 is connected to chassis 131 as shown in FIG.
It protrudes above the chassis 131 through a hole 349 formed in the slide plate 335, and is inserted into the elongated hole 337 of the slide plate 335.

In the above configuration, when the brake gear 341 rotates, the pin 347 travels within the grooved cam 344. Here, the arm 364 stops at the position shown in FIG. 1 when the pin 347 travels inside the guide section 342, and when the pin 347 travels inside the guide section 343, the arm 364 moves clockwise and counterclockwise. Rotate to. When the arm 364 rotates, the pin 348 shown in FIG. 6 rotates, the slide plate 335 moves in the left-right direction, and the pin 336 moves in the left-right direction. When the pin 336 moves in the left-right direction, the brake levers 320, 321 rotate or move in the left-right direction following this pin 336.

FIG. 6 shows a state in which the pin 336 is located at the leftmost position, and in this state, the brake pad 325 of the brake lever 320 is located apart from the outer peripheral surface of the reel stand 143, and the brake pad 335 of the brake lever 321 is in pressure contact with the outer peripheral surface of the reel stand +44. Therefore, at this time, the brake is applied to the reel stand 144. When the pin 336 moves slightly to the left from this state, the protrusion 332 follows and the brake lever 321 moves slightly to the left, and the brake pad 331 moves to the reel stand 14.
Separated from the outer peripheral surface of 4. Therefore, at this time, both reel stands 143 and 144 are not braked.

When the pin 336 further moves to the left from this state, the protrusion 332 follows this and moves the brake lever 32.
1 moves to the left, and the inclined surface 333 of this brake lever 321 matches the inclined surface 326 of the brake lever 320. Here, the brake levers 320, 321 are connected to the inclined surface 3.
26, 333 in sliding contact with the pin 336, the spring 3
It rotates by the urging force of 34.

In this case, the brake lever 320 rotates counterclockwise, and the brake lever 321 rotates clockwise. This allows the brake pad 325 of the brake lever 320 to
is in pressure contact with the outer peripheral surface of the reel stand 143, and the brake lever 3
21 brake pads 331 are pressed against the outer peripheral surface of the reel stand 144. Therefore, at this time, the reel stand 143,1
Brakes are applied to both 44's.

As described above, in this brake mechanism 317, the reel stand 1
Brake applied only to 44, reel stand 143,1
44 in a state where both sides are released, reel stands 143, 14
Three states can be obtained: a state in which the brakes are applied on both sides. These three states are obtained by rotationally displacing the brake gear 341 in accordance with each mode of the tape recorder.

L, Other Structures (FIGS. 5 and 6) A tape cassette guide pin 351 is erected on the right rear side of the support shaft 288 that supports the tension adjustment arm 289. This tape cassette guide pin 351 is a tape cassette guide pin 351 located in front of the above-mentioned capstan 170.
It positions the tape cassette 72 together with the alignment guide pin 278.

Further, fixed guide posts 352 and 353 are provided on the left end rear portion of the upper surface of the chassis 131 so as to sandwich the elongated hole 315.
has been erected.

Further, in FIG. 6, a tape cassette 72 has a magnetic tape 357 built into a cassette case 356. A recess 358 for pulling out the magnetic tape 357 is formed on the front side of the cassette case 356, that is, on the side facing the head drum 158 when the cassette case 356 is installed in a tape recorder. This recess 358 is covered by a lid body (not shown) that can be opened and closed. In addition, there are two tape receptacles (not shown) inside the cassette/soto case 356.
In other words, a supply tape reel and a take-up tape reel are rotatably arranged, and the magnetic tape 357 is passed from the supply tape reel side to the recess 35 through the tape outlet 359.
8, passes through the tape outlet 360, and is wound onto the take-up tape reel. Also, cassette case 35
6, tape cassette guide pins 278 of the tape recorder, . A positioning hole (not shown) into which 351 is inserted is formed.

M. Operation of tape recorder (Figures 2 to 4, 6)
Figure 9, Figure 12 (A) to (C), Figure 13 (A)
~ (D)) In the tape recorder configured as described above, loading and unloading operations of the tape cassette 72, loading and unloading operations of the magnetic tape 357, movement of the pinch roller 273, operation of the tape tension mechanism 287, and brake The mechanism 317 operates as follows.

First, when the tape recorder is in a standby state, each member of the tape recorder is in the state shown in FIG. 2, FIG. 4, FIG. 6, and FIG. 13(A). That is, at this time, the tape cassette holder 80 of the tape cassette loading mechanism 70 has its pins 84° 85 positioned at the front ends of the horizontal portions 76A and 77A of the holder guide holes 76 and 77, as shown in FIGS. 2 and 4. As a result, it is located near the front end of the frame 71. In addition, the drive gear 20
9 and 210 are placed at the limit position in the unloading direction (the position shown in FIG. 13(A)), and the arm 31
The pin 313 fixed to the guide wall 2 of the cam part 213
15, 216 and is fixed to the auxiliary arm 269.
It is located far away from. In this state, the moving blocks 189 and 190 are located at the frontmost positions of the guide elongated holes 134 and 135. In addition, the pinch roller arm 26
The engagement wall portion 271 of No. 8 is the engagement wall portion 2 of the moving block I90.
04 and fixed to the tension adjustment arm 289, the tension adjustment pin 291 is engaged with the movement block 18.
It engages with the engagement wall portion 197 of No.9. Further, the loading switching mechanism 242 is placed in a standby position as shown in FIG. 12(A). Furthermore, the brake mechanism 317 restrains the reel stand 144 from rotating by pressing the brake pad 325 of the brake lever 321 against the outer peripheral surface of the reel stand 144.

To record and reproduce signals from the above state, the tape cassette 72 is inserted into the opening 106 of the frame 71 as shown in FIG. 2, and the tape cassette 72 is loaded onto the tape cassette holder 80. .

When the tape cassette 72 is loaded into a fixed position on the tape cassette holder 80, this state is detected by a sensor (not shown), and the loading motor 243 rotates forward based on the output of the sensor. When the motor 243 rotates forward, the tape loading gear 248, intermediate gear 249, and tape cassette loading gear 250 rotate in the direction of arrow A in the state shown in FIG. 12(A), and the slider 87 moves rearward. When the slider 87 moves rearward, the main gear 94 meshing with the rack gear 88 of the slider 87 rotates, causing the gear 95 to rotate, as shown in FIG. Rotate in direction C. When the rocking bodies 97 and 98 rotate in the above-mentioned direction, the grooves 99 and 100 of these rocking bodies 97 and 98
The pins 84.85 located inside the holder guide hole 76.7
7 from the horizontal portions 76A, 77A to the vertical portions 76B, 77B, whereby the tape cassette holder 80 on which the tape cassette 72 is mounted moves to the holder guide hole 76.
．． 77, that is, move backward for a certain section and then downward.

The tape cassette 72 that descends together with the tape cassette holder 80 finally reaches the reel stand 143 as shown in FIG.
, 144, where the reel stand 143
, 144 are engaged with the engagement holes of the reels, and the reels are rotated integrally with the reel stands 143, 144. At this point, the rack gear 88 of the slider 87 and the main gear 94 are disengaged, the tape cassette holder 80 stops moving downward, and the loading of the tape cassette 72 is completed. In addition,
The slider 87 is then moved rearward by the tape cassette loading gear 250, which continues to rotate.

In the above condition, the tape loading boss 196
A, 196B, inclined guide post 199A, 199B,
Pinch roller 273. The moving guide boss 275 is the sixth
As shown in FIG. 13(A), the tape cassette 72
The magnetic tape 357 is located inside the recess 358 of the tape cassette 72 and inside the magnetic tape 357 pulled out to the front of the tape cassette 72 .

When the loading of the tape cassette 72 is completed as described above, the loading switching mechanism 242 shown in FIG. 12 shifts from the state shown in FIG. 12 (B) to the state shown in FIG. is rotated by the tape cassette loading gear 250 and the lever 26
1's engagement part pushes the engagement wall part 225 of the drive gear 210,
The tape loading gear 248 meshes with the teeth 212 of the drive gear 210, and the drive gears 210 and 209 rotate in the loading direction.

When the drive gears 209, 210 rotate in the loading direction, the moving blocks 189, 210 move as shown in FIG. 13(B).
190 moves backward and tape loading post 19
6A and 196B wind the magnetic tape 357 around the head drum 158 while pulling it out rearward.

At this time, the pinch roller arm 268
71 is biased clockwise by the spring 285 while engaged with the engagement wall portion 204 of the moving block 190, so that it rotates clockwise following the movement of the moving block 190, causing the pinch roller 273 to rotate. Move the capstan in the direction of 170. When the pinch roller arm 268 rotates in the above direction, the movable guide post 275 is guided by the groove cam 277 and moves to the right rear while the guide post arm 274 rotates, and this movable guide post 275 is moved to the right by the pinch roller 273. First, the magnetic tape 357 is moved toward the right rear capstan 170. At this time, the magnetic tape 357 is attached to the groove 276 (the ninth
(see figure). The pinch roller arm 268 temporarily stops when its engagement wall 271 separates from the engagement wall 204 of the moving block 190, and at this time, the pin 280 fixed to the auxiliary arm 269 engages the drive gear 21.
The guide wall 221 of the cam portion 219 formed at 0 is brought into contact with the guide wall 221 of the cam portion 219 .

Furthermore, when the moving block 189 moves backward, the tension adjusting arm 289, which is biased counterclockwise by the spring 294 with the tension adjusting pin 291 engaged with the engagement wall 197 of the moving block 189, , moves counterclockwise following the movement of the moving block 189, as shown in FIG. Stop.

The moving blocks 189, 190 that move rearward finally touch the positioning pins 193, 2 as shown in FIG. 13(C).
02 stops moving when it engages with the grooves 137, 137 of the positioning plates 138, 138, and is positioned at the loading completion position. On the other hand, when the moving blocks 189 and 190 move from FIG. 13(B) to FIG. 13(C),
As the drive gear 210 rotates, the pin 280 fixed to the auxiliary arm 269 is guided by the guide wall 221 of the cam portion 219, thereby causing the pinch roller arm 268 to move to the auxiliary arm 269 as shown in FIG. 13(C). The pinch roller 273 moves closer to the capstan 170 and the movable guide post 275 moves to the right. As described above, when the moving blocks 189 and 190 reach the loading completion position, the loading motor 243 stops rotating, and the stop mode is established. Immediately before this stop mode is established, the brake lever 321 of the brake mechanism 317 shown in FIG. 6 releases the restraint of the reel stand 144. Furthermore, at the time when the stop mode is established, the rotation of the tape cassette loading gear 250 is stopped, thereby stopping the backward movement of the slider 87.

In the above state, the pinch roller 273 is positioned at a certain distance from the capstan 170 as shown in FIG. 13(C). Also, tension adjustment pin 2
9] is located at a certain distance from the magnetic tape 357.

” In the stop mode described in item 1, when a command to record or reproduce a signal is issued, the loading motor 243
further rotates forward by a certain amount, and the drive gears 209 and 210 rotate by a certain amount in the loading direction. In this case, drive gear 2
09, the pin 230 rotates against the biasing force of the torsion spring 235 while keeping it in that position, and the pin 230 moves from one end of the elongated hole 214 to the other end position. Rotate until it reaches . Further, the drive gear 210 resists the biasing force of the torsion spring 236 to
31 is rotated while being placed at that position, and the pin 231 is rotated from one end of the elongated hole 220 to the other end position.

When the drive gear 209 rotates as described above, the guide wall 217 of the cam portion 2+3 formed on the drive gear 209,
218 guides the pin 313 fixed to the arm 312, which causes the arm 312 to rotate counterclockwise and the pin 314 fixed to the arm 312 to move to the left end within the elongated hole 315. When the pin 314 moves as described above, the tension adjustment arm 289 that was engaged with the pin 314 rotates counterclockwise by a certain amount due to the biasing force of the spring 294, thereby causing the tension adjustment pin 291 to move to the left by a certain amount. move towards Here, the tension adjustment pin 291 pulls the magnetic tape 357 between the fixed guide posts 352 and 353 in the shape of () to apply a predetermined tension to the magnetic tape 357.

Further, when the drive gear 210 rotates as described above, the guide wall 2 of the cam portion 219 formed on the drive gear 210
21 guides a pin 280 fixed to the auxiliary arm 269, whereby the pinch roller arm 268 rotates clockwise together with the auxiliary arm 269 by the biasing force of the spring 285, and the pinch roller 273 357 inside, it contacts the capstan 170. Then, the guide wall 22 of the cam portion 219
2 guides the pin 280 so that the auxiliary arm 26
9 rotates a certain amount in the clockwise direction, and as a result, the pinch roller arm 268 receives the biasing force of the spring 282, so that the pinch roller 273 comes into pressure contact with the capstan 170.

When the drive gears 209, 210 rotate as described above, the brake mechanism 317 shown in FIG. 144 Remove the restraints on both sides.

Thus, the tape recorder enters the play mode shown in FIG. 13(D). In this state, the tape cassette 72
After the magnetic tape 357 is pulled out from the left end of the cassette case 356, it contacts the fixed guide post 352, the tension adjustment pin 2911, and the fixed guide post 353, and extends rearward, and then moves to the tape loading post 196A.
Rear inclined guide post 199A wrapped around and folded back
and is wound around the head drum 158. After being wrapped around the head drum 158, it contacts the inclined guide post 199B, and the tape loading post 196B
After passing between the capstan 170 and the pinch roller 273, it contacts the moving guide post 275 and is introduced into the right end of the cassette case 356.

Then, in the above state, the reel stand driving motor 150, the capstan driving motor 175, and the head drum 15B are driven, and the capstan 170 and the pinch roller 27 are driven.
3 causes the magnetic tape 357 to run at a constant speed, and the reel stand +44 is driven to move the magnetic tape 357 at a constant speed.
57 is wound up on the take-up reel, and the head drum 158
Signals are recorded or reproduced by rotating the upper drum 159.

During the above signal recording or reproducing operation, the tension of the magnetic 66 tape 357 is kept constant by the tape tension mechanism 287. That is, in FIGS. 10 and 13(D), if the tension applied to the magnetic tape 357 is stronger than the specified tension, the tension adjustment pin 291
is moved slightly to the right by the tension of the magnetic tape 357, and the tension adjustment arm 289 is rotated slightly clockwise. When the tension adjustment arm 289 rotates in the above direction, the band 309 wound around the drum part 147 of the reel stand 143 is loosened, the load on the reel stand 143 is lightened, and the magnetic tape 3 is unwound from the supply reel.
The load on the magnetic tape 357 is reduced, which reduces the load on the magnetic tape 357.
The tension applied to it is reduced. Further, when the tension applied to the magnetic tape 357 is weaker than the specified tension, the tension adjustment pin 291 moves slightly to the left by the biasing force of the spring 294 with respect to the magnetic tape 357 running with a weak tension applied. and tension adjustment arm 289
rotates slightly counterclockwise. Tension adjustment arm 2
89 rotates in the above direction, the band 309 comes into strong contact with the drum part 147 of the reel stand 143, and the reel stand 14
．． As the load on the magnetic tape 357 becomes heavier, the load on the magnetic tape 357 that is fed out from the supply reel becomes heavier, thereby increasing the tension applied to the magnetic tape 357. In this way, the tension of the magnetic tape 357 is always kept constant.

Then, when the recording or playback of the signal is finished and a stop command is given to the tape recorder, the tape recorder
The stop mode shown in FIG. 3(D) is entered. Then, when a command is given to unload the magnetic tape 357 and tape cassette 72, the loading motor 243
rotates in the opposite direction, drive gears 209 and 210 rotate in the unloading direction, moving blocks 189 and 190 move forward, and the tape loading post 1 is moved forward in the reverse order.
96A, 169B, inclined guide post 199A, 199
B, the pinch roller 273, moving guide post 275, and tension adjustment pin 291 return to the non-loading position.

Furthermore, this! : tree! The magnetic tape 357, which has been pulled out to a part of the outside 67 of the cassette case 356, is wound onto the supply reel by driving the roll stand 143. Further, at this time, the slider 87 moves forward as the tape cassette loading gear 250 rotates. Thus, the unloading of the magnetic tape 357 is completed when the teeth 212 of the drive gear 210 and the tape loading gear 248 are disengaged.

Thereafter, the rack gear 88 of the slider 87 shown in FIG. 2 meshes with the main gear 94, and the gears 94 and 95 rotate, and the rocking body 97°98 rotates in the direction of the arrow, so that the pins 84 and 85 are guided by the holder. The holes 76, 77 move from the vertical portions 7'6B, 77B to the horizontal portions 76A, 77A, thereby returning the tape cassette holder 80 and the tape cassette/slot 72 to their original positions. Here, a sensor (not shown) detects the position of the tape cassette 72, and the loading motor 243 stops based on the detection result.
In this way, the unropping ink of the tape cassette 72 is completed.

"Effects of the Invention" According to the present invention, by rotating the first and second drive gears, the two tape loading posts are moved from the non-loading position to the loading completion position via the eleventh and second loading post links. In the tape drive device, the eleventh second drive gear is moved so that the two tape loading posts pull out the magnetic tape in the tape cassette and wind the magnetic tape around the head drum at a predetermined winding angle. After each tape loading post is rotated in the loading direction to reach the loading completion position, the first and second drive gears are configured to be further rotated in the loading direction. The movement of the drive gear after reaching the loading completion position can be used as a drive force for moving the pinch roller or the tension adjustment pin, for example, and the drive gear can be used for a variety of purposes.

[Brief explanation of the drawing]

170- FIGS. 1 to 13 (A) to (D) are diagrams showing the configuration of a tape recorder equipped with a tape drive device (one embodiment) according to the present invention, and FIG. Fig. 2 is a perspective view of the tape cassette loading mechanism, Fig. 3 is a plan view of the main parts, Fig. 4 is a side view of the main parts, and Fig. 5 is the main parts of the tape recorder. Perspective view of 6th
7 is a bottom view of the same, FIG. 8 is a side sectional view of the tape loading post portion, FIG. 9 is a perspective view of the pinch roller portion, and FIG. 10 is a plan view of the main parts of the tape tension. , FIG. 11 is a sectional view taken along the line X-X in FIG.
FIGS. 13A to 13D are explanatory diagrams of the operation of the tape loading mechanism. 14 to 16 are diagrams showing a tape recorder equipped with a conventional tape drive device,
FIG. 14 is a plan view of the tape recorder in a non-loading state, FIG. 15 is a plan view of the tape recorder in play mode, and FIG. 16 is a horizontal sectional view showing the main parts of the tape loading mechanism. FIG. 17 is a bottom view of a tape recorder equipped with another conventional tape drive. 72... Tape cassette, 158... Head drum, 196A, 196B... Tape loading post, 209... First drive gear, 210... Second drive gear, 211, 212... Teeth, 214, 220・
... Long hole, 228 ... First loading post link, 229 ... Second loading post link, 2
30° 231... Pin, 235... First biasing member, 236... Second biasing member, 243... Drive source (
loading motor), 357...magnetic tape.

Claims (2)

[Claims] (1) A head drum provided with a magnetic head, and two supports that are movable between a non-loading position, which is the inside position of the magnetic tape of the tape cassette, and a loading completion position on the side of the head drum. It has a tape loading post and a long hole extending in the circumferential direction,
first and second drive gears having teeth formed on their respective circumferential surfaces meshing with each other; a drive source for rotating these first and second drive gears; and the first drive at one end. a first loading post link having a pin that engages with the elongated hole of the gear and whose other end is connected to one of the tape loading posts; and one end that engages with the elongated hole of the second drive gear. a second loading post link having a mating pin and whose other end is connected to another one of the tape loading posts; and a pin provided on the first loading post link to the first loading post link. a first biasing member that biases the tape loading post connected to the loading post link toward the loading completion position; and a pin provided on the second loading post link that biases the tape loading post to the second loading post. a second biasing member that biases the tape loading post connected to the link toward the loading completion position; 1. 2 above via the second loading post link
2 tape loading posts are moved from the non-loading position to the loading complete position, thereby
A tape drive device which pulls out a magnetic tape in a tape cassette with two tape loading posts and wraps the magnetic tape around the head drum at a predetermined winding angle, the first and second drive gears being moved in the loading direction. After the tape loading posts are rotated to reach the loading completion position, the first and second drive gears are further rotated in the loading direction within a range in which each of the pins can move within the elongated hole. A tape drive device characterized by: (2) A tape according to claim 1, characterized in that a cam portion is formed on the surface of the first and second drive gears, and the cam portion drives another loading member. Drive device.