JPS6138120Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette mounting device for a cassette tape recorder, and more particularly to a cassette mounting device that reduces impact noise and is particularly suitable for thin decks.

Thin erect deck (panel height approximately 120mm or less)
In the conventional one-fulcrum method of mounting an arm-type cassette, the fulcrum approaches the cassette side, so the cassette hits the tip of the capstan when the cassette is mounted, making it impossible to mount it.

Therefore, as in this embodiment, it is effective to attach and detach the cassette parallel to the capstan, that is, perpendicular to the chassis surface, until the cassette ejects from the capstan, and then rotate the cassette holder to facilitate removal of the cassette.

The present invention, in the above structure, smoothes the cassette mounting device to reduce impact noise, and uses a spring sliding system that keeps the amount of spring displacement to a minute amount even when it is thin, and the cassette holder when the cassette holder moves from vertical to rotational. This reduces impact noise.

For this reason, the present invention has a thin cassette deck that is perpendicular to the chassis until it is removed from the capstan, and then the cassette holder is rotated to make the cassette protrude from the panel surface. When the spring that presses the device moves in response to the movement of the cassette holder, the amount of displacement of the spring changes greatly, and the spring tension and tension direction of the spring change to prevent this from affecting the damper effect. In order to keep the amount of displacement of the spring to a minute amount and to keep the tension direction of the spring to a minute amount so as to maintain a constant load on the cassette holder, the spring has a straight section that allows it to slide on the damper wire on the chassis. A damper wire and a spring attached to the damper wire are used to reduce the impact noise when the cassette holder changes from vertical movement to rotational movement and to make the movement of the entire cassette holder approximately uniform. It has a reduction gear at the end of vertical motion.

Embodiments of the present invention will be described below with reference to the drawings. 1
indicates a chassis, 2 and 2' are cassette positioning guides molded on the chassis, 3 is a head plate slidably guided on the chassis, 4 is a magnetic head fixed on the head plate, and 5 is also a head. a magnetic head fixed on a plate; 6 a pinch roller arm rotatably attached to the shaft established on the shaft; 7 a pinch roller rotatably attached to the pinch roller arm 6; 8; is a capstan that is fixed to the flywheel 9 and rotatably mounted on a bearing 1' fixed on the chassis, and the pinch roller 7 pinches and presses the tape to rotate the capstan. drive the tape. Reference numeral 10 is a cassette ejection arm, which is connected to pins 12 on holders 11 and 11'.
It is rotatably mounted around the fulcrum. 13 is a spring for the cassette ejection arm, 14 is a side plate A attached to the chassis, 14a and 14b are guide holes, 15 and 15' are shafts fixed on the chassis 1, and 16 and 17 are tape drive turntables. It is rotatably mounted around shafts 15, 15'. 18 is a side plate B attached to the chassis;
18a and 18b are guide holes, 19 is an intermediate pulley, and the rotation of the turntable 17 is transmitted by a belt. 20 is fixed to the chassis with a solenoid mounting plate. 21 is a shaft established on the side plate A14, 22 is an ejection lever rotatably attached to the shaft 21, and 24 is a cassette holder having a guide capable of holding a cassette. 24a is a roughly "shaped guide hole, 24b is a pin attached to the cassette holder 24, and 24c is a protrusion that is integrally attached to the cassette holder 24, so that the cassette ejecting arm is always in contact with the cassette ejection arm when the cassette holder is moved up and down and rotated. They are in contact and are receiving the load of the spring 13. 25 is side plate A14, side plate B18
Motor A2 with a holder fixed with screws etc.
6. Motor B27 is fixed. It also serves to regulate the thrust position of the flywheel 9.
A belt 28 transmits the power of the motor to the flywheel 9. 29 is a solenoid, 30 is a plunger, 31 is a pin attached to the plunger pin, and 32 is a head plate operating lever A. By energizing the solenoid, it cooperates with other members to slide the head plate 3 to the playback/recording position. let 33 is a damper arm, which is connected to the pin 24b of the cassette holder 24.
It is rotatably mounted on the 34 is an elastic member such as rubber attached to the damper arm 33, and a spring 36 is hung between the damper arm 33 and the damper wire 38 attached to the chassis.
is pressed against the gear on the reduction gear 35.
It is assumed that the speed reduction device 35 also includes a wind panel.
37 is an annular washer made of plastic or the like which is interposed between the damper wire 38 and the spring 36, and is attached so as to be able to slide on the damper wire 38.

39 is a spring applied between the pin 40' on the link lever A43 and the side pressure B18, 40 is the other pin on the link lever A43 and the side plate A14
The guide hole 14a is loosely fitted to the guide hole 14a. 41 is a pin on the link lever B42, which is loosely engaged with the guide hole 14b of the side plate 14. Also, pin 4 on the other side
0' and 41' are guide holes 18a and 18b of the side plate 18
The pins 40 and 41 are respectively loosely connected to each other and are located symmetrically to the pins 40 and 41.

Reference numeral 43 denotes a link lever A, which is rotatably attached to the link lever 42 by a pin 44, and has a pin 40 at one end and a pin 46 at the other end, and the pin 46 is the rotation fulcrum of the cassette holder 24. becomes. 46 is a pin fixed on the link lever 42, 45 is a locking pin fixed on the link lever B, and when the cassette holder is closed (FIG. 5), the locking portion 47b of the eject slider 47 is locked. It is locked. Reference numeral 47 denotes an eject slider, which is slidably mounted on the side plate A14 and biased in one direction by a spring 48. Also, one end has an eject lever 22.
By rotating the eject lever 22 in response to this, the eject slider 47 slides and removes the lock pin 45 from the lock portion 47b. 47
Reference characters a, 47b, and 47c represent the shapes of the cams in the lock portion, and 47d represents the shape of the cam on an extension of the radius R centered on the pin 41 in FIG. 49 is pin 4
0, a cassette holder 50 presses the cassette toward the head, 51 a cassette, and 52 a part of the case.

Next, the operation of the present invention will be explained. When the cassette is in contact with the positioning guides 2 and 2' on the chassis 1, that is, in the playing state, the lock pin 45 is positionally regulated by the cam 47b on the eject slider 47. Pin 4 on link lever A43
0 is located on the right end side of the guide hole 14a, and the pin on the link lever B42 is located on the upper right side of the "shaped guide hole of the cassette holder 24, so the cassette holder 24 is held in the state shown in FIG. . At this time, the damper arm 33 is at the lowest position, and therefore the spring applied to the damper arm 33 is located near the lower end of the damper wire 38.
In this state, the cassette holder 24 and the protrusion 24c are located below the cassette ejecting arm 10 and receive the load of the spring 13.

The position of the cassette holder shown in FIGS. 4 and 5 is assumed to be the first position.

Next, the operation when ejecting a cassette will be explained. First, when the eject lever 22 is pressed in the direction A from the state shown in FIGS. 4 and 5, that is, the first position, the eject lever 22 rotates counterclockwise. An eject slider 47 is located at the other end of the lever 22.
slide it to the right. When the lock pin 45 on the link lever 13 slides until it disengages from the lock portion 47b of the eject slider 47, the pin 40 is moved from the side plates 14, 18 by the force of the spring 49 applied to the pin 40 on the link lever A43.
slide the guide holes 14a, 18a to the left end. The movement of the link lever A43 accompanying this sliding causes the link lever B42 to rotate about the pin 41, resulting in the state shown in FIG. 6. This movement causes the cassette holder 24 to move perpendicularly to the chassis 1. Here, the position of the cassette holder shown in FIG. 6 is assumed to be the second position.

At this time, the cassette ejection arm 10 is moved by the spring 1
3, the partial protrusion 24c of the cassette holder 24
Press. Due to this pressing force, the cassette holder receives a biasing force in a counterclockwise direction about the fulcrum 46.
This biasing force is applied to the "shaped hole 24" of the cassette holder 24.
When the pin is in contact with the upper part 24a' of 24a', the cassette holder 24 is prevented from rotating, and when it is away from the corner of 24a', it is rotated by the biasing force.

Furthermore, the cassette holder 24 is rotated by the biasing force, as shown in FIG. 7, until the other end 24a abuts against the pin 46. This position is defined as the third position.

The cassette holder 24 moves perpendicularly to the chassis 1 from a first position to a second position and pivots from a second position to a third position, and operates continuously.
The damper arm 33 and the elastic member 34 attached to the arm 33 also move continuously from the first position to the third position in accordance with the movement of the cassette holder 24, and the gear on the reduction gear 35 moves as the elastic member 34 moves. It rotates as it moves and applies a damper to the damper arm 33 and elastic member 34. As a result, the cassette holder 24 with the damper arm 33 attached
It is possible to apply a damper to the releasing force of the cassette holder due to the spring force 49 in the opening direction and the spring force 13 for rotating the cassette holder. Moreover, since the spring 36 and the washer 37 continuously slide on the damper wire 38 in the first position, second position, and third position, the damper arm 33
Although the amount of movement of the cassette holder 24 is quite large, the amount of displacement of the spring does not substantially change, and therefore the pressing direction is also approximately constant, and the pressing force can be kept within an appropriate range. On the other hand, the above 36 springs are not loaded in one direction, and the damper effect is approximately constant. The washer 37 has the effect of smoothing the uneven movement caused by friction when sliding the 38 dump wire 38 and preventing the generation of resonance noise of the spring.

Next, when the cassette holder 24 is displaced from the second cassette holder position to the third position, that is, when the cassette holder 24 changes from being displaced perpendicularly to the chassis to rotating around the pin 46, the movement of the cassette holder 24 can be made more smoothly and continuously. A device for directional displacement will be explained.

When ejecting, the cassette holder 24 moves vertically relative to the shaft until the pin 46 leaves the hole 24a', and after the pin 46 leaves the hole 24a', it rotates around the shaft 24 until the pin 46 hits the hole 24a. The rotating device has been described above, but in order to smoothly move the cassette holder 24 when moving from vertical to rotating operation, the lock pin 45 is
In order to control the operation after the lock is released from 47b, the shape of the cam part 47 will be described in the state shown in FIG. It consists of a cam that is inclined more inward than the cam and a cam that is provided with a vertical surface 47a for regulating the amount of movement of the slider 47 so that the locus of the pin 45 always hits 47b, and the right side of the eject slider. When the lock pin 45 moves away from the corner of the 47b section, the lock pin 45 first moves along the radius R, then comes into contact with 47b from the middle, and as the lock pin 45 moves, the eject slider moves to the right. let
At this time, in order to further extend the spring 48 applied to the eject slider 47 and applying tension to the left, the movement of the lock pin 45 is braked, slowing down the movement, and therefore stopping at the left end of the guide hole 14a. The impact noise of the 40-pin is reduced, and the operation of the cassette holder 24 smoothly transitions from vertical operation to rotational operation.

Next, move the second cassette holder from the first cassette holder position.
To explain the movement of the cassette when it is displaced to the third position, in the first position, the cassette 51
is pressed in the head direction by the cassette presser 50, and the cassette is positioned on the vertical plane of the cassette positioning guides 2, 2'. This state is the playable state, and when the solenoid 29 is energized, the head plate 3 is moved in the direction of the cassette via the lever 32, and the head on the head plate 3 comes into contact with the tape, and the tape is applied to the capstan 8 and pinch roller 7. Drive the tape by pinching it. In this first position, the cassette ejection arm 10 is in contact with the protrusion 24c of the cassette holder 24 and is away from the cassette.

Then, in the second position, the cassette 51 hits the chassis 1 and moves vertically away from it. During this time, the cassette ejecting arm 10 always moves toward the protrusion 24c.
is in contact with the spring force 13. Due to the biasing force of the spring 13, a moment is always applied to the cassette holder 24 to rotate counterclockwise around the fulcrum 46, but the rotation is prevented by the pin 46 in the hole 24a' of the cassette holder 24. There is. In this state, the cassette ejecting arm 10 is located behind the surfaces of the cassette guides 2, 2' that contact the cassette, and therefore does not hit the cassette. However, as shown in FIG. 6, when the pin 46 separates from 24a', the cassette ejection arm 1
The cassette holder 24 begins to rotate due to the biasing force of 0. While the cassette ejection arm 10 rotates the cassette holder 24, the arm 10 itself also rotates clockwise as the projection 24c moves.
At this time, the front end of the cassette ejection arm 10 pushes out the front surface of the cassette in the direction B. In the third position, the cassette can be pushed out from the tip of the positioning guide by the L dimension. Therefore, it is convenient and easy to take out the cassette. Moreover, since the cassette does not move relative to the cassette holder from the first position to the second position, the cassette does not hit the case 52, and moreover, the cassette 51 is pushed out after passing the end of the case 52. , a tape recorder with a small set width and an easy to remove cassette can be created.

Therefore, the present invention provides the following effects.

1. A cassette mounting device in which a cassette holder is displaced from a playing position to a mounting position has an extremely simple structure with a damper spring hooking system that is particularly effective for thin decks in order to have an appropriate damping effect during the displacement.

2. At the time of changing the displacement of the cassette holder, which rotates from vertical movement until the cassette escapes from the capstan, the displacement of the holder can be changed by simply regulating the locking part of the cassette holder of the eject slider and the shape of the cam after the lock is released. To reduce the impact noise of the cassette mounting device at the time of loading, and to smooth the movement of the entire cassette mounting device with an extremely inexpensive and simple configuration.

3. Also, in order to prevent the spring from resonating due to friction when the spring in 1 above slides on the straight portion of the damper wire, a washer made of plastic or the like is simply used to make the spring smooth and free from resonance, resulting in no unpleasant noise.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, with the cassette mounting device in the playable position. 2 is a rear view of FIG. 1, FIG. 3 is a side view of FIG. 1, and FIG. 4 is a side view of the other side of FIG. 1, showing a state in which the cassette loading device is locked. FIG. 5 is a main side view of the present invention, showing the cassette loading device locked in the playable position. FIG. 6 is a main side view of the present invention, showing the position of the cassette loading device at the end of its vertical movement relative to the chassis. FIG. 7 is a main side view of the present invention, showing the cassette mounting state of the cassette mounting device. 24...Cassette holder, 33...Damper arm, 38...Damper wire, 42, 43
...Link lever, 47...Eject slider.

Claims (1)

[Claims for Utility Model Registration] 1. A cassette mounting device for mounting a cassette housed in a cassette holder on a cassette drive device, which has an X-shaped link mechanism in which the centers of two links are rotatably connected. The pin at one end of the first link lever of the link mechanism is rotatably connected to a side plate attached to the chassis, and the pin at the other end is engaged with a "shaped guide groove formed in the cassette holder and moved toward the center." The lock pin is fixed, the pin at one end of the other second link lever is rotatably connected to the cassette holder, the pin at the other end is engaged with the elongated guide groove formed in the side plate, and the pin is attached with a spring. the cassette holder is biased upwardly through the link mechanism, and the upward deflection is locked by the horizontal portion of the cam of the eject slider that engages the lock pin, so that the eject slider is locked when the eject slider is moved. A release mechanism for releasing the cassette, a damper arm rotatably attached to a pin fixed on the cassette holder, a spring hung on the other end of the damper arm in a direction for engaging the damper arm with the reduction gear, and and a spring hanging member whose other end is fixed to the chassis, and the other end of the spring hung on the damper arm is attached so that it slides on the spring hanging member as the damper arm moves. Characteristic cassette mounting device. 2 Utility Model Registration Scope of Claim 1 In claim 1, an annular washer made of plastic or the like is attached to the other end of the spring hung on the spring hanging member, and the washer is attached to the spring hanging member so as to respond to the movement of the damper arm. A cassette mounting device that slides on a spring hanging member. 3 In paragraph 1 of the claims for utility model registration, the shape of the lock groove of the eject slider is
It consists of a cam part with a radius R centered on the pin on the rotatable side of the link lever, and a continuous cam part inclined further inward, and the lock pin that is out of the parallel part of the lock groove part is the eject slider. A cassette configured to further move the cam part and the eject slider against the spring force, and to decelerate the pin moving in the elongated guide groove of the second link lever before it hits the end of the guide groove. Mounting device.