KR900004304Y1 - Loading ring driving arrangement - Google Patents

Abstract

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Description

Power Separator for Tape Recorders

1 is a plan view showing the play system of V-Cal in which the present invention is installed in a playable state.

2 is a plan view showing the device of the present invention in a stationary state.

3 is a partial cross-sectional view of the present invention showing a configuration in which the operation lever and the compression lever are connected to the cam gear.

4 is a partial cross-sectional view of the present invention showing a configuration in which the loading gear is connected to the cam gear linked to the motor.

5a, b, and c are explanatory views showing the principle of operation of the present invention, a plan view showing the interlocking action of the cam gear, the compression lever, the transfer lever, and the loading gear, (a) is the stop mode state before loading (second Top view showing Fig.). (b) is a plan view showing the state before the tape loading is completed and the pinch roller is pressed. (c) is a plan view of a state in which tape loading is completed and the pinch roller is crimped to perform the play mode.

* Explanation of symbols for main parts of the drawings

1 substrate 11 rotating head drum

7: function plate 7a: groove

16: pinch roller 17: fixed shaft

18: pinch arm 20: loading ring

22: loading gear 22a: upper gear

22 ': Fixed shaft 22b: Reverse rotation preventing protrusion

23: bracket 24: fixed shaft

25: cam gear 25a: standby gear

25a ': incisor 25b: cam groove

25b ': Inflection section 25b' ': Concentric section

25c: Small gear 25d: Cam surface

25d ': Inflection section 25d' ': Concentric section

25e: arcuate contact protrusion 29: loading motor

26,27,28,35: fixed shaft 30: rotating shaft

31: Worm 32,33,34: Reduction Gear

36: bushing 37: feed lever

37a: Operation pin 37b: Mil pin

38: crimping lever 38a: operating pin

38b: main part 39: bearing part

40: fixing hole 41: locking piece

42: tension coil spring 43: sliding pin

44: brush 45: rotary

45a: shaft portion 46: space

47: circuit board 48: connection pin

49: screw

The present invention is a tape recorder having a helical scan type rotary head drum, which is suitable for the separate transmission of the power of the loading device for mounting the tape on the rotating head drum and the power for moving the pinch arm while the tape is loaded. In particular, the present invention relates to a power separation device suitable for a loading method in which a tape is loaded on a rotating head drum by rotating a loading ring installed around the rotating head drum.

In the conventional tape recorder using a helical scan type rotating head drum, a general power separating device forms two cam curves, but combines both cam curves with concentric and changing parts to meet the needs and a planetary gear. Two ways to use are mainstream.

The above cam method is suitable for a tape recorder which drives the reel by the idler mechanism by transmitting power to the idler mechanism by a belt or the like from a reel motor or a capstan motor installed near the cassette lock release mechanism. Since the lower part is used as an installation space, the mechanism can be installed without being constrained in the planar space, while the height is restricted and the mechanism must be laid out in the plane, so the mechanism is complex and the parts are assembled to the upper and lower parts of the main board. As a result, the number of parts used increases and assembly work becomes cumbersome.

On the other hand, the method using a planetary gear is suitable for a tape recorder using a reel drive means as a reel direct motor, and is usually installed at the right side of the drum and in front of the cassette, so that the height space is relatively large, while the plane space is narrow, The gears are used to drive the loading device once, loading the tape onto the rotating drum and then driving the cam to provide the power source to perform other functions.

However, this method is generally composed of the whole assembly, but the assembly is good, but because the planetary gear and cam, etc. are superimposed, the height is too high and the plane space is severely constrained, and the braking device of the planetary gear must be installed. There was a bug to be complicated.

The present invention has been made in view of the conventional problems, to provide a power separation device that can achieve miniaturization and thinning while maintaining the characteristics of the planetary gear, it is attached to Figures 1 to 5 When described in detail as follows.

1 is a schematic plan view showing a traveling system of a tape recorder provided with the device of the present invention, on which a tape cassette 2 is seated on a substrate 1 with a cassette holder (not shown) inserted therein, and the tape 3 Is wound around the hub (4, 4 ') is coupled to the projection of the reel table (not shown) installed on the substrate 1 so that the hub (4) (4') can be rotated by the reel table rotation have.

The tape guide 5, which restricts the supply-side tape guide area, and the inclined post 6 for guiding the tape 3 inclined to guide the tape 3 helically on the outer circumferential surface of the head drum 11 are cassettes 2. The position of the preload (5 ') and 6' in the mouse is moved by the function plate (7) between the loaded position (5) and (6). Moveable by means (not shown) from the loading completion position 8 to "

The guide roller (9) and the tape guide (10), which are the tape retracting portions, are integrally moved, and the loading completion positions (9) and (10) at the pre-loading positions (9 ') and (10') in the mouth of the cassette (2). It is moved by the conveying means connected to the annular loading ring 20 until a predetermined pressing force is applied in the state of loading completion.

12 and 13 are guide posts for regulating the internal angle to the head drum 11, and 14 and 15 are guide posts, and a rotation material is inserted into the shaft 17 fixed to the substrate 1 together with the pinch roller 16. As the pinch arm 18 is rotated by the function plate 7 and the pin 18a, the tape 3 is drawn out and moved to the front and back of the capstan shaft 19, and the pinch roller 16 is crimped | bonded to the capstan shaft 19 by a predetermined force. 14 ', 15' and 16 'show the guide posts 14 and 15 and the pinch rollers being positioned in the mouse of the cassette 26 before loading and 3' shows the tape before loading.

Further, the annular loading ring 20 is rotatably installed around the rotating head drum 11 by appropriate supporting means. The annular loading ring 20 has a gear formed on the outer circumferential surface thereof is engaged with the loading gear 22 and rotates as the loading gear 22 rotates.

The traveling system of the tape recorder as described above is generally known in the tape recorder as the tape travel guide parts move to the playable state by driving the function plate 7 and the annular loading ring 20.

The present invention, in the driving system of the tape recorder as described above, by separating the driving force of the loading motor 29 into the cam gear 25, the transfer lever 37 and the compression lever 38 to the function plate (7), annular It is to provide a power separation transmission device that can be delivered to the loading ring 20 and the pinch arm 18 to drive.

In the power separation transmission device of the present invention, the shaft 24 is fixed to the bracket 23 fixed on the substrate 1, and the cam gear 25 is rotatably inserted into the shaft 24.

In the cam gear 25, a spiral wound cam groove 25b is formed on the upper surface of the standby gear 25a, and a cam surface 25d is integrated in the lower portion of the small gear 25c formed integrally with the lower portion of the standby gear 25a. The cam groove 25b has an inflection portion 25b 'and a concentric portion 25b' ', and the cam surface 25d has an inflection portion 25d' and a concentric portion 25d ''.

In addition, the cutting gear 25a 'of a predetermined length is formed in the air gear 25a of the cam gear 25, and the arcuate contact protrusion 25e' is formed above the cutting part 25a '.

The small gear 25c of the cam gear 25 is adhered to the shafts 26, 27, 28 fixed to the substrate 1, respectively, and the worm 31 fixed to the rotation shaft 30 of the loading motor 29. Cam gear 25 is rotated as the loading motor 29 is rotated because it is connected to the output side reduction gear 34 of the reduction gear 32, 33, 34 that transmits the rotational force of ().

The air gear 25a of the cam gear 25 is connected to the upper gear 22a of the loading gear 22 which is fixed to the substrate 1 with the fixed shaft 22 'so that the cam gear 25 is the loading motor. As the driving force of (29) rotates, the loading gear 22 rotates and the annular loading ring 20 connected thereto rotates.

On the upper surface of the upper gear 22a of the loading gear 22, a reverse rotation preventing protrusion 22b to which the arc-shaped contact protrusion 25e of the cam gear 25 comes into contact is integrally formed.

Meanwhile, upper and lower portions 37 'and 37' 'of the transfer lever 37 are integrally fixed to the upper and lower portions of the bushing 36 rotatably inserted into the shaft 35 fixed to the bracket 23. An actuating pin 37a fixed to the upper portion 37 'of the transfer lever 37 is inserted into the cam groove 25b of the cam gear 25, and fixed to the lower portion 37' '. The mil pin 37b is inserted into the recess 7a formed at one end of the function plate 7 installed to be linearly movable left and right by appropriate supporting means.

In the bushing 36 to which the transfer lever 37 is coupled, an intermediate shaft portion 39 of the crimping lever 38, in which an actuating pin 38a is fixed, is rotatably inserted into one end of the crimping lever 38. The actuating pin 38a is in contact with the cam surface 25d of the cam gear 25 and one end is fixed to the engaging piece 41 formed in the bracket 23 in the inner fixing hole 40 of the actuating pin 38a. The other end of the tension coil spring 42 is fixed, and the sliding pin 43 protruding to the upper surface of the pinch arm 18 is in contact with the other end contact surface 38b of the crimping lever 38.

In addition, the upper portion of the fixed shaft 24 into which the cam gear 25 is inserted is provided so that the rotary 45 having the brush 44 made of an elastic body is rotatable and the shaft pipe portion 45a of the rotary 45 is rotated. A pattern for sensing a mode is formed on the circuit board 47 whose height is determined by the space 46 inserted into the inside, and the connecting pins installed on the upper surface of the cam gear 25 are formed on the rotary 45. 48 is inserted to rotate the rotary gear 45 according to the rotation of the cam gear 25, the brush 44 coupled to the rotary 45 is also rotated and bonded to the pattern formed on the circuit board 47, so cam gear ( The rotation position of 25) can be detected. The circuit board 47 is fixed to the shaft 24 with a screw 49, the other end is fixed to the supporter 50 installed in the bracket 23 with a screw 49 and a pattern for detecting the rotation position on one side It is connected to this wire (not shown), and is connected to a circuit control part.

When explaining the effect of the present invention made as follows.

2 and 5a show a state in which the device of the present invention is stopped. In this case, the tape is unloaded, that is, the tape 3 is not drawn out of the cassette 2.

When the cam gear 25 rotates clockwise by driving the loading motor 29 in such a state, the loading ring 20 rotates clockwise by the gear connection and the cam groove 25b of the cam gear 25. The feed lever 37 is inserted into the operating pin 37a is interlocked to rotate the counterclockwise to move the function plate (7) to the right, the guide post (5), by the movement of the function plate (7), The inclined post (6), guide roller (9), tape guide (10), guide posts (14) (15) and pinch arm (18) move to the loading position, whereby the tape (3) moves at the position of the virtual line. It is loaded to the position of the solid line to reach the states of FIGS. 1 and 5b. At this time, the upper gear 22a of the loading gear 22 is in contact with the cutout portion 25a 'formed on the atmospheric gear 25a of the cam gear 25, and the circular contact protrusion 25e formed on the upper surface of the atmospheric gear 25a. ) Is in contact with the reverse rotation detecting protrusion (22b) formed in the upper gear (22a) of the loading gear 22, the operating pin (37a) of the feed lever 37 is the concentric portion of the cam gear (25) cam groove (25b) 25b " and the actuating pin 38a of the compression lever 38 are in contact with the inflection portion 25d 'of the lower cam surface 25d of the cam gear 25. As shown in FIG.

In this state, the cam gear 25 continues to rotate clockwise, but the driving force transmitted to the loading ring 20 and the function plate 7 is cut off, and the crimping lever 38 rotates until the pinch roller ( 16) is pressed to the capstan shaft 19, this operation will be described in detail as follows.

That is, when the cam gear 25 continues to rotate clockwise in the state of FIG. 1 and FIG. 5b, the power transmitted from the standby gear 25a of the cam gear 25 to the upper gear 22a of the loading gear 22 is Blocking the loading gear 22 and the annular loading ring 20 associated with it stops the rotation and the circular arc contact protrusion 25e of the cam gear 25 is the anti-rotation protrusion 22b of the loading gear 22 Since it is pushed) is maintained without the reverse rotation, the operating pin (37a) of the feed lever 37 also slides in the cam groove (25b) concentric portion (25b '') of the cam gear 25 transfer lever (37) Stops the rotation and the movement of the function plate 7 that is moved to the right in conjunction with the transfer lever 37 is also stopped. The crimping lever 38 is held to rotate counterclockwise by the tension coil spring 42, and its operation pin 38a slides on the inflection portion 25d 'of the cam surface 25d of the cam gear 25. Since the cam gear 25 rotates in the clockwise direction, the cam gear 25 rotates in the counterclockwise direction. At this time, the sliding pin 43 of the pinch arm 18 contacts the contact surface 38b formed at the other end of the pressing lever 38. While the counterclockwise rotational force of the crimping lever 38 is transmitted to the pinch arm 18, the pinch arm 18 rotates clockwise about the fixed shaft 17, so that the pinch roller 16 has a camston shaft ( 19), a mode such as play is performed in this state.

On the other hand, in the case of unloading after the play or the like is finished, the unloading is performed in the above reverse operation according to the reverse rotation of the loading motor 29.

When the cam gear 25 is rotated when all the operations such as loading, unloading and play as described above are performed, the rotary 45 rotates, and the brush 44 made of an elastic body is rotated with the rotary 45. The rotation of the loading motor 29 is detected by detecting an operation position performed by turning on and off a plurality of contact terminals arranged on the circuit board 47 while rotating together.

The power separation device of the present invention as described above has a cam gear installed at one rear edge of the tape recorder so that the driving force of the small gear loading motor of the cam gear is transmitted to the loading gear through the air gear having the cutout of the cam gear. The transmitted power is transmitted to the loading ring, and the feed lever and the compression lever coaxially arranged on one side of the cam gear are interlocked with the cam groove and the cam surface of the cam gear, and the arc gear contact with the cam gear's air gear and the upper gear of the loading gear. Minimizes and thins the device by forming a protrusion and an anti-rotation protrusion to block the power of the loading gear and the loading ring while tape loading is completed, and to prevent the reverse rotation and the pinch roller to be pressed against the capstan shaft. It has the advantage of easy assembly, power separation and low number of parts. .

Claims (2)

An annular loading ring (20) interlocked with the rotating head drum (11) on which the tape (3) is wound in a helical shape, and a loading gear (22) mounted on one side of the rotating head (11) to rotate around the rotating head drum (11); In the tape recorder, one end of which is arranged on the substrate 1 with a fixed shaft 17 and the other end has a pinch roller 16 arranged thereon and a pinch arm 18 pivoted to a loading position by the function plate 7. The air gear 25a and the small gear 25c are integrally formed on the shaft 24 fixed to the bracket 23 by fixing the bracket 23 on one side substrate 1 of the loading gear 22. The cam gear 25 is formed on the worm 31, and the small gear 25c is formed on the fixed shafts 26, 27, and 28 on the worm 31 fixed to the loading motor 29 and the rotating shaft 30. At the same time connecting the reduction gears 32, 33 and 34 to be interlocked, the standby gear 25a forms a cutout portion 25a 'of a predetermined length and is loaded with a fixed shaft 22'. On the upper gear 22a The upper surface thereof is integrally formed with an anti-rotation protrusion 22b in contact with the annular contact protrusion 25e formed above the cutout portion 25a 'of the air gear 25a. The feed lever 37 is fixed to the bushing 36 adhered to the bushing 36, and the operation pin 37a of one end thereof is inserted into the cam groove 25b formed on the upper surface of the cam gear 25. ) Is inserted into the groove (7a) formed on one side end of the function plate (7), one side operation pin (38a) of the crimping lever (38) to which the bushing portion 39 is bonded to the bushing (36) The cam piece 25 is brought into contact with the cam surface 25b below the small gear 25c and is tensioned to the engaging piece 41 formed in the inner fixing hole 40 of the actuating pin 37 and the bracket 23. Both ends of the coil spring 42 are fixed, and the other end of the crimping lever 38 is formed by forming a recessed part 38b in contact with the sliding pin 43 fixed to the upper surface of the pinch arm 18. Tape Separate power transmission device of the coder. The cam groove 25b according to claim 1, wherein a cam groove 25b having an inflection portion 25b 'and a concentric portion 25b' 'is formed on an upper surface of the air gear 25a of the cam gear 25. And a cam face (25d) having a bend portion (25d ') and a concentric portion (25d' ') at a lower portion of the gear (25c).