KR100279210B1 - Tape Deck Brake Device - Google Patents

Abstract

The present invention relates to a brake system of a tape deck, which performs rapid feed, rewind, and stop of a tape by engaging and disengaging a main lever and a holder by swinging a holder by rotation of a cam. And a boss formed on the rib and the holder, wherein the holder is swung by disengagement of the rib and the boss.

Description

Tape deck brake device

1 is a plan view of a first embodiment of a brake device for a tape deck according to the invention;

2 is a main plan view of the first embodiment.

3 is an enlarged explanatory view showing the engaged state of the main lever and the holder of the first embodiment;

4 is a plan view showing operation of the brake state of the first embodiment.

5 is a plan view showing the operation of the holder of the first embodiment.

6 is a plan view showing another operation of the holder of the first embodiment.

7 is a sectional view of another principal part of the first embodiment.

8 is a plan view of the pulley of the first embodiment.

9 is a plan view showing a second embodiment of the present invention.

Fig. 10 is a plan view showing the operation when inserting a cassette in the second embodiment.

11 is an enlarged plan view of the cam portion of FIG. 10;

12 is a plan view showing the operation during the forward rotation of the cam.

13 is an enlarged plan view of the cam portion of FIG.

14 is a plan view showing the operation of the cam in reverse rotation.

15 is an enlarged plan view of the cam portion of FIG.

16 is a plan view of a brake device of a conventional tape deck.

* Explanation of symbols for main parts of the drawings

10: Deck Chassis 13: Mode Lever

30: main lever 32: cam

34: cam groove groove 41: holder

43: Boss 44: Rib

61: pin 62: boss

FIELD OF THE INVENTION The present invention relates to a brake device for tape decks, and more particularly to a brake device for applying braking to a reel in a tape deck embedded in a video tape recorder (VTR), for example.

The prior art performs the mode lever switching, the quick tape feed, the tape rewind and the stop function by the rotation of the cam 1 as shown in FIG.

In other words, in FIG. 16, the rotation of the cam 1 is transmitted to the holder 3 of the main lever (not shown) through the friction gear 2, and the main lever is operated by the swinging of the holder 3. Mode lever switching, quick tape feed, tape rewind, stop (braking), etc. are performed.

However, in the brake device of the conventional tape deck, the friction gear 2 is required for power transmission to the holder 3.

Therefore, the shaft 4, the spring 5 and the stop pin 6 are required to install the friction gear in the holder 3, resulting in an increase in the required number of parts.

The present invention has been developed to solve such a conventional problem, by engaging the ribs installed on the cam and the boss installed on the holder to rock the holder to eliminate the friction gear, and furthermore, the rapid tape feed, It is an object of the present invention to provide a brake device that enables rewinding and stopping.

The tape deck brake device of the present invention is characterized in that the tape feeds, rewinds, and stops the tape by the disengagement of the holder and the main lever for switching the mode lever by swinging the holder by the rotation of the cam in the tape deck. The brake device includes a rib formed in the cam and a boss formed in the holder, and the holder is rocked by disengagement of the rib and the boss.

In the present invention, when the cam rotates in the forward direction, the rib of the cam contacts the holder and swings the holder, thereby keeping the main lever in the rapid feed or rewind state.

If the drive motor of the cam rotates in reverse during rapid feed or rewind of the tape, the engagement between the holder and the main lever is released, and the main lever swings.

In this way, the mode lever is switched and the brake is operated.

When the cam rotates in the reverse direction, the holder returns to its initial state by engaging the rib and the boss.

The present invention is also characterized in that the boss formed in the cam recess of the cam prevents the fluctuation between the sides of the main lever when the engagement of the holder and the main lever is disengaged.

In this way, the rapid movement of the main lever is suppressed and made smooth, and the operation noise is greatly reduced.

The objects and features of the present invention will be described in detail with reference to the accompanying drawings.

The same parts as in FIG. 16 are denoted by the same reference numerals.

First, the configuration is as follows.

In FIG. 1, the feed reel 11 and the winding reel 12 are arranged on the front upper surface of the deck chassis 10. In FIG.

The mode lever 13 is installed on the deck chassis 10 to move left and right, and both ends of the mode lever are formed as a pair of inclined portions 14 and 15.

The main brake 16 is installed on the supply reel 11 side to be supported by the deck chassis 10 through the shaft 17, and is biased by the spring 18 in the counterclockwise direction, and an inclined portion at the upper end thereof. A pin 19 is provided in contact with 14.

The main brake 21 is installed on the reel 12 side to be supported by the deck chassis through the shaft 22 and is urged by the spring 23 in the clockwise direction, and at the upper end thereof contacts the inclined portion 15. The pin 24 is provided.

The long hole 25 of the mode lever 13 is engaged with the pin 26 of the main lever 30 supported by the deck chassis through the shaft 27.

The main lever 30 is biased counterclockwise by the spring 31.

The disc-shaped cam 32 is supported on the deck chassis 10 through the shaft 33, and the cam groove 34 is formed on the back side thereof.

The cam recess 34 is composed of a central arc-shaped portion 35 having the same center as the shaft 33 and a displacement portion 36 provided continuously at the end thereof.

A gear portion 37 is formed on the circumference of the cam 32, and the gear portion engages with the worm gear 38.

The pulley 40 is fixed to the worm gear 38 shaft and a belt (not shown) is installed between the pulley 40 and the pulley motor (not shown).

At the bottom of the cam 32, a main lever holder 41 (hereinafter referred to as a "holder") is mounted on the deck chassis 10 via the shaft 42.

On the upper surface of the holder 41, a boss 43 protruding upward is integrally formed, and the boss 43 is engaged with the rib 44 protruding from the bottom of the cam 32 (see FIG. 7). .

Moreover, the spring piece 45 is integrally formed with the side surface of the holder 41, and this spring piece 45 is engaged with the stopper 46 provided in the deck chassis 10. As shown in FIG.

An engaging portion 47 is formed at the upper end of the holder 41 and engaged with the upper end of the main lever 30 (see FIG. 3).

In FIG. 7, a kick lever 48 integrally formed with the axis 42 of the holder 41 is arranged on the back of the deck chassis 10.

The kick lever 48 and the holder 41 are a pair of synthetic resin lever bodies, and both of the 41 and 48 and the shaft 42 are integrally formed by outsert molding.

In FIG. 7, the upper end of the kick arm 50 is directed toward the inner surface of the pulley 40 by the force of the spring 52.

In this state, the rapid feed and rewind of the tape are performed by the high speed rotation of the reel 11 and the reel 12.

When a stop signal occurs during rapid feed or rewind of the tape, the rotation of the motor is reversed, and the pulley 40 is also reversed, whereby the kick arm 50 is pushed by the rib 51 and oscillated.

As a result, the holder 41 swings in the counterclockwise direction and the engagement with the main lever is released, and the main lever 30 swings in the counterclockwise direction by the force of the spring 31, and the state shown in FIG. Return to

That is, the mode lever 13 is moved to the right side by the swing of the main lever 30, and the pins 19 and 24 descend along the inclined portions 14 and 15, respectively, and the main brakes 16 ( 21 respectively come into contact with the reel table of the reels 11 and 12 to be stopped at the same time.

Returning to the rapid feed and rewind again, the rib 44 comes into contact with the boss 43 when the rotation of the motor is reversed again and the cam 32 is reversed in the direction of the arrow in FIG.

Further, when the reverse rotation proceeds, the holder 41 swings in the counterclockwise direction about the axis 42 as shown in FIG. 6, and the spring portion 45 comes into contact with the stopper 46 to bend. .

When the reversal of the cam 32 proceeds slightly further in the state of FIG. 6, the holder 41 is swung in the clockwise direction by the reaction force of the spring portion 45 to recover to the state of FIG. 1, or the boss 43. Is located within the radius of rotation whose center is the axis 42.

The kick arm 50 is supported to be rotated by the kick lever 48 to rotate in one direction by the spring 52 and to rotate in another direction by the stopper integrally with the kick lever 48.

In addition, the rib 51 in contact with the kick arm 50 is formed integrally with the side of the pulley 40 (see FIG. 8), and arranged at equal intervals on a circle having the same center as the axis center of the pulley 40. do.

The kick arm 50 is moved into the rotational trajectory of the rib 51 when the holder 41 is engaged with the main lever 30 at the rapid feed position, so that the rib 51 is caused by the forward rotation of the motor that rotates the cam clockwise. Contacting causes the kick arm 50 to retract towards the spring 52.

Next, the operation will be described.

1 shows that the position of the main lever 30 is just before the rapid feed and rewind state of the tape.

In this state, the main lever is positioned by the engagement of the pin 39 of the main lever 30 with the inside of the cam recess 34 in the cam 32.

In this state, when the motor is driven and the cam 32 rotates in the direction of the arrow 55 (clockwise) through the pulley 40 and the worm gear 38, the rib 44 contacts the boss 43. , The holder 41 swings clockwise with the shaft 42 as a point and the engaging portion 47 of the holder 41 engages with the upper end of the main lever 30 as in FIG.

The state shown in FIG. 2 is a rapid feed state of the tape.

In this case, the shape of the cam groove 34 is set such that a gap G is formed between the holder and the main lever as in the third diagram.

The reason for this is to make smooth engagement avoiding contact between the holder 41 and the main lever 30.

In the state of FIG. 2, the engagement of the rib 44 and the boss 43 is released, and at the same time, the pin 39 moves out of the arcuate portion 35 of the cam groove 34 and enters the displacement portion 36.

In addition, the main lever 30 is biased in the direction of the arrow 56 due to the force of the spring 31 and the force acting on the inclined portions 14 and 15 of the mode lever 13.

9 to 15 show another embodiment of the present invention.

A boss 43 projecting upward on the upper surface of the holder 41 is integrally formed to engage two ribs 44 and 60 projecting on the bottom surface of the cam 32.

In addition, in the displacement portion 36 of the cam groove, the boss 62 engaged with the pin 61 protrudes to form a cam mechanism together with the pin 60.

9 shows the cassette is not inserted into the deck. In this state, the pin 61 of the main lever 30 is located at the right end of the circular arc upper part 35 having the same center as the cam recess 34.

In this state, when the cassette is inserted, the motor is operated and the cam 32 is rotated in the forward direction (clockwise in FIG. 9) through the pulley 40, the worm gear 38 and the gear portion 37. Start the rotation.

At that time, as shown in FIGS. 10 and 11, the boss 43 of the holder 41 is pushed by the rib 44 of the cam 32, so that the holder 41 rotates the shaft 42. It swings clockwise as a point.

At the same time, the pin 61 of the main lever 30 moves along the cam recess 34, and the main lever 30 is swung in the counterclockwise direction with the shaft 27 as a point by the force of the spring 31. The upper end of the main lever 30 is held by the holder 41 as the tenth degree.

If the cam 32 continues to rotate in the forward direction, the ribs 60 of the cam 32 push the boss 43 of the holder 41 as shown in Figs. 12 and 13, so that the holder 41 is counterclockwise. Rocking in the direction.

Accordingly, the holding state of the main lever 30 is released as in the twelfth degree, and the main lever 30 generates a force to oscillate in the counterclockwise direction by the force of the spring 31.

However, at this time, the boss 62 is in contact with the inside of the pin 61 to prevent the swing of the main lever 30.

Therefore, it is possible to prevent the generation of operating noise due to the shaking of the main lever 30.

When the cam 32 is further rotated in the forward direction from the state of FIG. 12, the pin 61 is disengaged from the boss 62 but stopped at the inner wall of the displacement portion 36 of the cam recess 34 as shown in FIG. The main lever 30 smoothly swings from the twelfth to the fourteenth state, and the operation noise becomes very small.

14 shows that the mode lever 13 is moved to the right, the main brake 16 of the supply reel 15 is not operated, and the tape feed is the play mode.

When the cam 32 is reversed from the state of FIG. 14, the pin 61 slides in contact with the inner wall of the displacement portion 36 of the cam recess 34, and passes between the boss 62 and the inner wall as in the fifteenth degree. .

In other words, the pin 61 passes through a position different from that in the forward rotation, and the main lever 30 returns to the standby state of FIG. 10 by rotating clockwise.

In this embodiment, since the boss is installed in the cam groove to prevent movement in the swinging direction of the main lever, it prevents the sudden operation of the main lever due to the forward and reverse rotation of the cam when the cassette is inserted, and smooth operation can be obtained. Also, the operation noise can be greatly reduced.

As described above, according to the present invention, since the holder is swung by engaging the rib provided on the cam and the boss provided on the holder, the friction gear is not necessary.

Thus, the number of parts required is greatly reduced, assembly is simplified, and it is possible to reliably perform rapid feed, rewind and stop of the tape.

Claims (2)

In the brake device of a tape deck, wherein the cam is rotated by the rotation of the cam, and the main lever and the holder are disengaged from the main lever, and the tape is rapidly fed, rewinded and stopped. And a boss formed in the rib and the holder, wherein the holder is oscillated by disengagement of the one rib and the boss, and the one rib is formed to face inclined with respect to the radial direction of the cam. Surface side of the one rib is engaged with the boss in order to swing in the direction engaged with the main lever, and surface side of the rib of the one sheet is inclined in the direction that the holder is separated from the main lever. And a tape deck brake device. The cam according to claim 1, wherein the cam has a boss formed in the cam recess, and when the engagement between the holder and the main lever is released, movement of the main lever in the swinging direction is prevented by the boss. Brake device of tape deck.