JPS633006Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is used for loading magnetic recording and reproducing devices,
This invention relates to a device that completely stops the rotation of a reel stand during unloading. (B) Prior Art In magnetic recording and reproducing devices, when an arbitrary operation is performed using an operation selection button, the rotation of the take-up reel stand may have to be completely stopped. These are when loading, when stopping, and when performing poses. During rewinding and review playback, a slight back tension force (approximately 40 g) is required on the take-up reel stand, but a spring connected to the reel brake was sufficient for this. However, in order to completely stop the rotation of the reel stand, a back tension force that is slightly larger than the normal back tension force is required. Moreover, in the normal state, a back tension force of approximately 40 g must be used, and different loads must be applied to the take-up reel table depending on the operation selection. (c) Purpose of the invention The purpose of the invention is to apply an arbitrary load to the reel stand provided in a magnetic recording/reproducing device to ensure reliable operation. (d) Structure of the invention The present invention provides a reel stand braking device which is provided in a magnetic recording and reproducing device and includes a reel brake part, a spring, a slide link, a reel stand, and a chassis. The first and second
the reel brake part, which is integrally formed with an arm, a brake piece provided at the tip of the first arm, and an elastic piece provided on the first or second arm;
a slide link with a cam provided on the back surface, the spring is connected to the first arm or the second arm, the cam is engaged with the elastic piece, and the brake piece is connected to the reel stand. The reel stand braking device is characterized in that it comes into pressure contact with the reel stand braking device. (E) Embodiment Fig. 1 is a perspective view of the reel brake unit according to the present invention, Fig. 2 is a partially enlarged plan view of the reel stand braking device mounted on the chassis, and Fig. 3 is the reel stand at the time of ejection. Fig. 4 is a plan view of the state of the braking device; Fig. 4 is a plan view of the state of the reel stand braking device during loading; Fig. 5 is a plan view of the state of the reel stand braking device during review playback; Fig. 6 is a state plan view of the reel stand braking device during recording pause. FIG. 7 is a plan view of the state of the reel platform braking device; FIG. 7 is a plan view of the state of the reel platform braking device during stop; FIG. 8 is a plan view of the state of the reel platform braking device during rewinding. 1
1 is a reel brake part integrally formed with a bearing part 2, a first arm 3, a second arm 4, an elastic piece 5, and a brake piece 6; 7 is a spring; 8 is a cam 9
10 is a take-up reel stand, 11 is a supply reel stand, 12 is a back tension post, 13 is a pinch roller, 14 is a pinch roller mounting arm, 15 is an arm, 16 is a pin insertion hole, 17 is a slide link provided with Pins, 18 and 19 are springs, 20 are motors, 21 and 22 are pulleys, 23 are belts, 24 are worm gears, 25 are loading gears, 26 are grooves, 27 are capstans, 28 are attached to the back side of slide link 8 The pin 29 is a roll brake section that applies braking force to the supply reel stand 11. At the time of ejection, the back tension post 12 is positioned close to the supply reel stand 11 against the tension of the spring 18, as shown in FIG. At this time, the pin 28 provided on the back side of the slide link 8
is in the position shown in FIG. 3 in the groove 26 provided in the loading gear 25, so the slide link 8 is in the position shown in FIG. Next, during loading, as shown in FIG. 4, the back tension post 12 receives a counterclockwise rotational force from the spring 18, and as the loading post (not shown) moves in the loading direction. , as the motor 20 rotates, the loading gear 25 is rotated clockwise via the pulleys 21, 22 and the belt 23, and the slide link 8 moves to the right .
A spring 19 provided between the arm 15 and the arm 15 biases the arm 15 clockwise. Since the pin 17 provided on the pinch roller mounting arm 14 is inserted into the pin insertion hole 16 provided on the arm 15, the arm 15 rotates the pinch roller mounting arm 14 counterclockwise and rotates the pinch roller mounting arm 14. The pinch roller 13 provided at the tip is moved in the direction approaching the capstan 27, and the capstan 27 and the pinch roller 13 are made to face each other without coming into contact with the magnetic tape. As the slide link 8 moves to the right, the elastic piece 5 provided on the reel brake section 1 guides the cam 9 provided on the surface of the slide link 8 , and the elastic force of the spring 7 and the elastic piece 5 causes The signal is transmitted to the brake piece 6 via the first and second arms 3 and 4, and the brake piece 6 is pressed against the take-up reel stand 10.
The clockwise rotation of the take-up reel stand 10 is stopped. At this time, the load applied to the brake piece 6 is
Approximately 80 g is applied by the spring 7 and the elastic piece 5. Note that the brake piece 6 is pasted with felt. When in the review playback state, as shown in FIG. 5, the back tension post 12 receives a counterclockwise rotational force from the spring 18, and rotates further counterclockwise than in the case of FIG. 4. . At the same time, the pin 28 provided on the slide link 8 traces the groove 26 provided on the loading gear 25, so the slide link 8 finishes moving rightward, and the elastic piece 5 provided on the reel brake section 1 also slides. After tracing the cam 9 provided on the surface of the link 8 , the back tension force of the spring 7 is applied to the brake piece 6 via the first link 3.
No back tension force is applied from the elastic piece 5. Therefore, a load of approximately 40 g is applied to the brake piece 6 as a back tension force. Further, since the slide link 8 moves further to the right than in the case of FIG. 4 by the same operation as during loading, the arm 15 is rotated clockwise by the spring 19. As a result, since the pin 17 provided on the pinch roller mounting arm 14 is inserted into the pin insertion hole 16 provided on the arm 15, the pinch roller mounting arm 14 is rotated counterclockwise to the maximum extent, and the pinch roller mounting arm The pinch roller 13 provided at the tip of the capstan 27
The pinch roller 13 and captan 27
A magnetic tape is running between the two. During the recording pause, as shown in Fig. 6, the back tension post 12 is rotated clockwise against the tension of the spring 18 compared to the time of review playback shown in Fig. 5, and the recording standby state is reached. do. at the same time,
Rotate the motor 20 in the reverse direction and load the loading gear 2.
5 counterclockwise, the slide link 8 is moved slightly to the left compared to the time of review playback, and moved to a position where the elastic piece 5 provided on the reel brake part 1 comes into contact with the cam 9. Therefore, although a load is applied to the brake piece 6 by the spring 7 and the elastic piece 5, the same load as shown in FIG. 4 during loading is not applied. Then, since the loading gear 25 rotates slightly counterclockwise, the slide link 8 moves slightly to the left compared to during playback, so the rotational force of the arm 15 by the spring 19 weakens and is restored to the counterclockwise direction. . Therefore, pinch roller mounting arm 1
4 rotates slightly clockwise, pinch roller 1
3 and the capstan 27 are released, and a recording standby state is entered. When stopped, the back tension pole 1 is moved against the tension of the spring 18 as shown in Figure 7.
2 is rotated clockwise. At the same time, motor 2
0 and the loading ring 25 counterclockwise, the slide link 8 is moved to the left from a position other than the stop shown in FIGS. 4, 5, 6, etc. go. Since the elastic piece 5 provided on the reel brake part 1 guides the cam 9 provided on the surface of the slide link 8 , the brake piece 4 has an elastic piece in addition to the back tension force due to the tension of the spring 7. A back tension force due to the elasticity of 5 is applied, and the bearing part 2 is rotated counterclockwise around the bearing part 2. Therefore, the counterclockwise rotation of the take-up reel stand 10 is completely stopped. Then, the loading ring 25 is rotated counterclockwise, and the slide link 8 is moved to the left, so that the tension on the spring 19 is relaxed, so the arm 15 is rotated counterclockwise, and the pinch roller mounting arm 14 is loosened. The pin 17 provided in the arm 15
Since the pinch roller mounting arm 15 is inserted into the pin insertion hole 16 provided in the pin insertion hole 16 provided in the pin insertion hole 16, the pinch roller mounting arm 15 is rotated clockwise, and the pinch roller 13 is separated from the capstan 27 by a large distance. In this way, the stopping operation is completed. When rewinding, as shown in Figure 8,
The back tension post 12 is rotated slightly more clockwise against the tension of the spring 18 than when playing back as shown in FIG. 5, and rotated in the same direction as when performing the recording pause as shown in FIG. 6. At the same time, the slide link 8 is moved to the right, the cam 9 provided on the back surface of the slide link 8 is brought close to the elastic piece 5 provided integrally with the reel brake section 1 , and the back tension is applied to the take-up reel stand 10. adding force. As the motor 20 rotates in the forward direction, the loading gear 25 rotates clockwise, and the slide link 8 moves to the right while loading the tape.
The arm 15 rotates clockwise due to the tension of the spring 19 attached between the arm 15 and the pin 17, which is inserted into the pin insertion hole 16. is transmitted to the mounting arm 14, and the pinch roller mounting arm 1
4 is rotated counterclockwise so that the pinch roller 13 faces the capstan 27 without being pressed against it. (f) Effects By implementing the present invention, two types of loads can be applied depending on the operation: the load necessary to stop the rotation of the take-up reel stand, and the load necessary to apply back tension force. You can choose. In addition, by integrally molding and providing an elastic piece in the reel brake part, it is possible to apply an appropriate load to the brake piece, and with only one part, it is possible to obtain a part that has the role of a spring. Therefore, the reel stand braking device can be constructed from highly efficient components that are low in cost and operate reliably. Furthermore, as shown in the present invention, by integrally molding the groove or cam on the loading gear,
The number of parts can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the reel brake unit according to the present invention, Fig. 2 is a partially enlarged plan view of the reel stand braking device installed on the chassis, and Fig. 3 is a plan view of the reel stand braking device in the state when ejected. Figure 4 is a plan view of the reel stand braking device during loading;
Fig. 5 is a plan view of the state of the reel stand braking device during playback, Fig. 6 is a plan view of the state of the reel stand braking device during recording pause, and Fig. 7 is a plan view of the state of the reel stand braking device when stopped. FIG. 8 is a plan view of the reel stand braking device during rewinding. Explanation of main drawing numbers, 1 ...Reel brake part, 5
...Elastic piece, 6...Brake piece, 7...Spring, 8
...Slide link, 10...Rewind link,
12... Back tension post, 13... Pinch roller, 20... Motor, 24... Worm gear, 25... Loading gear, 26... Groove, 27... Capstan, 28... Pin.

Claims (1)

[Scope of utility model registration request] Tape loading, in which one reel stand is stopped and the other reel stand is rotatable, the magnetic tape is pulled out from a tape cassette and held from the stop position to the recording/playback position; A magnetic recording and reproducing machine that performs tape unloading in which the magnetic tape is stored in the tape cassette and held from the recording and reproducing position to the stop position while the other reel stand is rotated, the bearing unit comprising: a bearing unit; an arm extended from the arm, an elastic piece provided on the arm, and a brake piece integrally molded to face the one reel stand; a reel brake part that elastically holds the reel brake part; a slide link having a spring that presses against the reel stand with a back tension force, and a cam that slides upon transmission of the driving force of a motor and presses the elastic piece during the tape loading and unloading; When the cam presses the elastic piece during tape loading and tape unloading, the brake piece is pressed against the one reel stand with a contact force greater than the back tension force generated by the spring and the elastic piece. A reel stand braking device characterized in that the one reel stand is stopped by causing the one reel stand to stop.