JP3157653B2 - Cassette guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette guide device in a cassette type tape recorder, and is applicable to, for example, a digital compact cassette (hereinafter referred to as "DCC") tape recorder.

[0002]

2. Description of the Related Art For example, unlike an analog compact cassette (hereinafter referred to as "ACC"), a DCC has no opening on a top plate for engaging a reel hub with a reel base. Therefore, in the DCC tape recorder, one that engages with the cassette in place of the open hole and guides the cassette to a predetermined position is required. In addition, since the DCC tape recorder is compatible with the ACC, a device that engages with the ACC and guides it to a predetermined position is required.

In a conventional ACC tape recorder, as a member for guiding the cassette to a predetermined position, a leaf spring is bent and formed in a U-shape, and the elastic force of the leaf spring sandwiches the cassette so as to insert the inside of the cassette holder. Was guided to a predetermined position.

[0004]

According to the above-mentioned conventional cassette guide device, the cassette is sandwiched and guided to a predetermined position by a "U" -shaped leaf spring. In order to clamp, it is necessary to increase the elasticity of the leaf spring, and it is necessary to insert the cassette against this strong elasticity when inserting the cassette. Further, the elasticity of the leaf spring is reduced due to aging or fatigue due to repeated use, and the clamping force required to guide the cassette to a predetermined position may not be obtained. Further, the leaf spring made of a metal plate or the like has a disadvantage that the surface of the cassette is easily damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and the cassette clamping force is divided into two stages until the cassette is inserted into a holder and guided to a predetermined position. The operability is improved by reducing the amount of force required when inserting the cassette into the holder.The leaf spring is not required, so that the clamping force does not decrease over time or due to repeated use, and the cassette surface can be damaged. It is an object to provide a cassette guide device without any.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a holder for holding a cassette, a slider movably provided in the holder in the cassette insertion direction and having a cassette receiving portion, and the slider And a pressing member rotatably provided on the pressing member.
A first biasing member for pressing the cassette inserted into the holder against the cassette receiving portion of the slider; A second biasing member for applying a rotating force in the biasing direction.

[0007]

When the cassette is inserted into the holder, the cassette rotates the pressing member against the urging force of the first urging member,
The pressing member presses the cassette against the cassette receiving portion of the slider by the urging force of the first urging member. When the second urging member is moved in the cassette retraction direction by means such as activating the motor upon detecting that the cassette has been inserted, the second urging member comes into contact with the pressing member, and the pressing member and Along with moving the slider in the cassette retraction direction, the second urging member abuts the pressing member to further urge the pressing member in the urging direction, thereby applying a turning force to the pressing member, and The clamping force of the cassette between the slider and the cassette receiving portion is increased.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cassette guiding apparatus according to the present invention will be described below with reference to the drawings. In FIG. 1, a chassis 1 has a front surface on a lower left side, a side wall 2 which is bent up on a left edge portion when viewed from the front side, and a sub-chassis 7 on the chassis 1 along a right edge. Fixed. A vertical guide hole 3 is formed in the side wall 2, and horizontal guide holes 12, 12 are formed at positions before and after the guide hole 3. The sub-chassis 7 also has a side wall, and the side wall has a pair of vertical guide holes 8 and 8 and a pair of horizontal guide holes 1.
3 and 13 are formed. The vertical guide hole 3
The pins 5 fixedly implanted on one side wall of the cassette holder 4 are fitted into the guide holes 8, and the pins 6, 6 fixedly implanted on the other side wall of the cassette holder 4 are fitted into the pair of guide holes 8. That is, the cassette holder 4 is vertically movably supported by the pins 5, 6, and 6 being guided by the guide holes 3, 8, and 8.

The cassette holder 4 is formed so that both side edges of the plate are bent downward at right angles, and further bent inward at right angles so that the cassette tape can be held therein. Slider 4
3 are formed, and guide portions 42 of the slider 43 are formed on both sides of the window hole 41 by bending. A suspension plate 10 is arranged on the cassette holder 4 so as to overlap from above.

The hanging plate 10 has side walls along both side walls of the cassette holder 4 on both sides, and a plurality of projections 11, 11 formed by bending these side walls into the horizontal guide holes 12, 13. By being fitted respectively, the suspension plate 10 is supported so as to be movable in the horizontal direction within the range of the guide holes 12 and 13. On one side wall of the suspension plate 10, inclined grooves 14, 14 into which the pins 6, 6 of the cassette holder 4 fit are formed. Inclined grooves 14, 14
Is inclined so that the near side (the left side in FIG. 1) is low and becomes high toward the back. Each of these inclined grooves 14, 14
The pins 6, 6 are located at the intersections of the guide grooves 8, 8 in the vertical direction. Therefore, when the suspension plate 10 is moving to the near side, the holder 4 is in the ascending position, and when the suspension plate 10 is moved to the back, the holder 4 is lowered.

The slider 4 is mounted on the ceiling of the suspension plate 10.
A relief portion 57 is formed for 3 and the pin 15 is fixedly implanted. The pin 15 is fitted in a long hole 38 formed at the tip of the lifting lever 35. Lift lever 3
Numeral 5 is provided so as to be rotatable in a horizontal plane by fitting the sleeve 36 on a shaft provided on the chassis 1. A pin 37 is fixedly implanted in the elevating lever 35 at an intermediate portion in the longitudinal direction.

As shown in FIG. 4, a sub motor 25 is fixed to the sub chassis 7 in a horizontal direction. The driving force of the sub motor 25 is controlled by the worm 26, worm wheel 27, reduction gear trains 28, 29,
The power is transmitted to the load gear 32 via 30 and 31. On the lower surface side of the load gear 32, a cam groove 39 formed of a concentric arc portion and a portion having a continuously different distance from the rotation center is formed, and the cam groove 39 is formed in the cam groove 39.
0 pin 37 is fitted. Therefore, the sub motor 25
Is driven in the forward or reverse direction, the load gear 3
2 rotates forward or backward, and the cam groove 39 pushes the pin 37, and the lift lever 35 is rotated clockwise or counterclockwise in FIG. 4, so that the elongated hole 38 of the lift lever 35 fits into the pin 15. As a result, the suspension plate 10 is moved back and forth.

A pin 33 is provided on the upper surface of the load gear 32.
Has been solid planted. The pin 33 is fitted into the cam groove 23 (see FIG. 1) of the auxiliary lever 20 through the window of the rotating arm 18. The rotating arm 18 and the auxiliary lever 20 overlap each other, and are both supported so as to be rotatable in a horizontal plane about a fixed shaft 16 fixedly planted in the chassis 4. The above cam groove 2
3, as shown in FIG. 1, comprising a range l ₁ straight and scope l ₂ arc-shaped to follow. The rotation arm 18 and the auxiliary lever 20 are connected by a tension spring 21, and the auxiliary lever 20 abuts on a protrusion of the rotation arm 18, so that the auxiliary lever 20 can temporarily rotate integrally with the rotation arm 18. It has become. A downward projection 22 is formed on the rotating arm 18, and as shown in FIG.
The projection 22 pushes the actuator of the switch 24 when the is rotated counterclockwise. Switch 24
Controls start and stop of the sub motor 25.

A pin 1 is provided on the lower surface of the tip of the rotating arm 18.
9 is fixedly implanted, and the pin 19 is inserted into the hole 54 of the holding member 50 with a sufficient space as shown in detail in FIG. As shown in FIGS. 1 to 3, the holding member 50 has receiving holes 51, 51 on both sides of an intermediate portion in the front-rear direction, and has a flat plate-shaped tip portion 52 on the near side and the above-mentioned hole 54 on the rear side. The frame 59 is provided. The receiving holes 51, 5
Bosses 47, 47 formed on the slider 43 are fitted to the slider 1, and the pressing member 50 is supported rotatably about the bosses 47, 47 in a vertical plane. Here, the receiving hole 5
Reference numerals 1 and 51 denote a shape in which the upper part of the ring is cut off when viewed from the side, and the bosses 47 and 47 have a shape in which the upper and lower parts of the circle are cut by parallel planes when viewed from the side. With the holding member 50 rotated 90 degrees,
After the bosses 47 are inserted into the cutouts 1 and 51, the holding member 50 is rotated about the bosses 47 and 47 so as to be substantially parallel to the slider 43. By doing so, the pressing member 50 is rotatably supported without falling off the slider 43.

A pressing rubber 53 for pressing the cassette inserted into the holder 4 is fixed to the lower surface of the distal end portion 52 of the pressing member 50. The front end of the pressing rubber 53 is inclined so that the cassette can be easily received. The slider 43 has guide ribs 44 on both sides,
The guide ribs 44 are connected to the guide portions 4 of the holder 4.
The slider 43 is held movably in the front-rear direction together with the pressing member 50 by being guided by the guides 2 and 42. A receiving portion 46 is formed at the rear end of the slider 43 by extending vertically downward and then extending forward. As shown in FIG. 3, the rear end of the cassette 60 inserted in the holder 4 is connected to the receiving portion 46 and the pressing member 50.
Between the pressing rubbers 53.

A spring 56 as an urging member is hung on the slider 43 and the pressing member 50. The elastic force of the spring 56 urges the pressing member 50 to rotate clockwise in FIG. The pressing member 5
The cassette 60 is sandwiched between the pressing rubber 53 and the receiving portion 46 of the slider 43. As shown in FIG. 3, a projecting surface 55 is formed on a rear wall defining a hole 54 for receiving the pin 19 of the rotating arm 18, and the pin 19 comes into contact with the projecting surface 55. . The spring 56 is used as a first urging member, and the rotating arm 18 is used as a second urging member.
Of the urging member.

As shown in FIGS. 1 and 7, a positioning hole of the cassette is fitted on the chassis 1 at the recording / reproducing position, and the reference pins 70 for positioning the cassette at a predetermined position.
71 are planted. The distal end of the reference pin 70 on the back side is formed in a conical shape, whereas the reference pin 7 on the front side is
1 is lightened so that the cross section becomes a cross shape.

Next, the operation of the above embodiment will be described. FIG.
Indicates the initial position, the rotating arm 18 and the elevating lever 35 rotate counterclockwise, the pressing member 50 moves to the near side together with the slider 43, and the suspension plate 10 also moves to the near side. The holder 4 is raised by the suspension plate 10 being moved to the near side, and is at a position where the cassette 60 can be inserted into the holder 4. The pressing member 50 is rotationally urged clockwise in FIG. 3 by the urging force of the spring 56, and a part of the pressing rubber 53 is advanced into the insertion passage of the cassette 60.

When the cassette 60 is inserted in the longitudinal direction from the cassette insertion opening of the holder 4 at the initial position,
As shown in FIG. 3, the rear end of the cassette 60 is
The pressing rubber 53 is pushed up and the pressing member 50 is moved to the first position.
Is rotated counterclockwise against the urging force of the spring 56, which is the urging member, and the pressing rubber 53 and the receiving portion 46 of the slider 43 are rotated.
The rear end portion of the cassette 60 enters between them, and the pressing force of the spring 56 causes the pressing rubber 53 and the receiving portion 4 of the slider 43 to move.
6, the rear end of the cassette 60 is clamped.

When the cassette 60 is further pushed in, the rear end of the cassette 60 pushes the frame 59 of the holding member 50 rearward, and the slider 43 moves rearward together with the holding member 50, and the holding member 50 pushes the pin 19. By pushing, the rotating arm 18 is rotated clockwise in FIG. The rotation of the rotation arm 18 causes the protrusion 22 to escape from the actuator of the switch 24, and causes the switch 24 to perform a switching operation to start the sub motor 25. By starting the sub motor 25, the worm 26 and the worm wheel 2 on the output shaft
7. The load gear 32 is driven to rotate clockwise in FIG. 4 via the reduction gear trains 28, 29, 30, 31.

In the first half of the rotation of the load gear 32 in the clockwise direction, the cam groove 39 in which the pin 37 fits is formed along a concentric circle, so that the lifting / lowering lever 35 does not rotate, while the cam groove 39 fits in the cam groove 23. The pin 33 presses against the side wall of the cam groove 23, and the auxiliary lever 20 and the rotary arm 1 substantially integral therewith are pushed.
8 is rotated clockwise in FIG. Rotating arm 1
The pin 19 moves rearward (upward in FIG. 4) by the rotation of the pin 8, and thereafter the pin 19 presses the protruding surface 55 of the pressing member 50 without pressing the cassette 60, and the pressing member together with the slider 43. The cassette 50 held between the pressing rubber 53 of the pressing member 50 and the receiving portion 46 of the slider 43 is moved rearward. When the pin 19 of the rotating arm 18 serving as the second urging member presses the protruding surface 55, the pressing member 50 is further rotationally urged clockwise in FIG. 3, and this rotational urging force is applied by a spring. The cassette 60 includes the pressing rubber 53 of the pressing member 50 and the slider 4.
3 between the receiving portion 46 and the third receiving portion 46 with a stronger force.

Since the slider 43 and the pressing member 50 are moved rearward with the clamping force of the cassette 60 strengthened in this manner, the cassette 60 is also reliably pulled backward. When the rotating arm 18 is rotated by a predetermined angle and the cassette 60 is retracted to a predetermined standby position, as shown in FIG.
As shown in FIG. 6, the cam groove 23 cooperating with the pin 33 is positioned on a concentric arc centered on the rotation center of the load gear 32. Thereafter, the rotating arm 18 is held at the rotating position shown in FIG. You. On the other hand, the cooperating position of the cam groove 39 formed on the load gear 32 with the pin 37 is out of the concentric arc position with the load gear 32, and the cam groove 39 pushes the pin 37 to rotate the elevating lever 35 clockwise in FIG. Let it.

With the rotation of the lifting lever 35, the long hole 3
8 moves the pins 15 of the suspension plate 10 backward,
0 is moved backward (upward in FIG. 6). Suspension plate 1
By the movement of 0, the inclined grooves 14, 14 (see FIG. 1) push down the pins 5, 6 of the holder 4 downward. Due to this pressing force, the pins 5 and 6 of the holder 4 are guided by the guide grooves 3 and 8.
And descend toward the chassis 1. The holder 4 holds the cassette 60 and the slider 43
Are held by the guide portions 42, 42, and the slider 43 descends while supporting the pressing member 50. Cassette 6 dropped
The reference pins 70 and 71 on the chassis 1 are fitted into the positioning holes 0, and the cassette 60 is positioned on the chassis 1. The sub motor 25 stops in this positioning state. The positioning position is a recording / reproducing position, and recording / reproducing and other various operations are performed at this position.

When the cassette 60 is to be ejected from the recording / recovery position, the sub motor 25 is rotated in reverse by the eject signal. Accordingly, the operation is performed in the reverse order to the above-described operation. That is, in FIG.
5 rotates counterclockwise, the suspension plate 10 moves forward, the holder 4 is raised from the chassis 1, and then the rotating arm 18 rotates counterclockwise as shown in FIG. 43 and the holding member 50 are moved forward, the cassette 60 is pushed out to the state shown in FIG. 4, and the projection 22 of the rotating arm 18 pushes the actuator of the switch 24 to stop the sub motor 25.

According to the embodiment described above, the slider 43 is provided on the cassette holder 4, the holding member 50 is provided on the slider 43 so as to be rotatable, and the holding member 50 is attached to the cassette inserted into the holder 4. Slider 43
And presses the pressing member 50 and the slider 43 in the cassette retracting direction by contacting the pressing member 50 and pressing the pressing member 50 against the pressing member 50 by contact with the pressing member 50. By providing the pin 19 for applying a rotational force in the urging direction, the pressing force of the cassette by the urging force of the pressing member 50 and the pressing force of the pressing member
0 is further applied in two stages, that is, the pressing force due to the force for rotating in the urging direction, so that the pressing force when the cassette 60 is inserted into the holder 4 resists the urging force of the pressing member 50. A small pressing force is sufficient, and operability can be improved.

Also, like a conventional cassette guide device,
Since the cassette does not need to be clamped by the "U" -shaped leaf spring, the elasticity may be reduced due to aging or fatigue due to repeated use, and the surface of the cassette 60 may be damaged by the leaf spring. Can be eliminated.

Further, at the recording / reproducing position, the pressing member 5
Since the pressing rubber 53 of the pressing member 50 presses the cassette 60 toward the chassis 1 based on the elasticity of the spring 56 that urges 0, the rattling of the cassette 60 can be prevented. .

[0028] The cassette guide device according to the present invention comprises a DC
C is of course also applicable as a cassette guide device of ACC.

[0029]

According to the present invention, a slider is provided on a cassette holder, a holding member is rotatably provided on the slider, and the holding member is pressed in such a manner that a cassette inserted into the holder is pressed against a receiving portion of the slider. The first urging member abuts on the pressing member to move the pressing member and the slider in the cassette retraction direction, and the contact with the pressing member causes the pressing member to rotate in the urging direction. A second biasing member for adding power;
Accordingly, the cassette pressing force is determined by the pressing force of the pressing member by the first urging member and the force of the second urging member contacting the pressing member to rotate the pressing member further in the urging direction. Since the pressure is applied over two stages of the pressing force, the pressing force when inserting the cassette into the holder 4 needs only a weak pressing force against the urging force of the pressing member by the first urging member. Performance can be improved.

Further, like a conventional cassette guide device,
Since there is no need to clamp the cassette with a "U" -shaped leaf spring, the elasticity is reduced due to aging or fatigue due to repeated use, and the leaf spring does not damage the surface of the cassette. be able to.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a cassette guide device according to the present invention.

FIG. 2 is an exploded perspective view of a slider and a holding member in the embodiment.

FIG. 3 is a cross-sectional side view of a part of the slider and the pressing member according to the first embodiment.

FIG. 4 is a plan view of the embodiment.

FIG. 5 is a sectional side view of the same.

FIG. 6 is a plan view showing a different operation mode of the embodiment.

FIG. 7 is a perspective view showing a reference pin in the embodiment.

[Explanation of symbols]

 4 Holder 18 Rotating arm as second urging member 43 Slider 46 Receiving unit 50 Pressing member 56 First urging member 60 Cassette

Claims (1)

(57) [Claims] 1. A holder for holding a cassette, a slider movably provided in the holder in the cassette insertion direction and having a cassette receiving portion, a pressing member rotatably provided on the slider, and a pressing member A first urging member for urging the cassette inserted into the holder against the cassette receiving portion of the slider; and abutting the pressing member to move the pressing member and the slider in the cassette retraction direction. A cassette urging member having a second urging member for applying a rotational force to the urging member in the urging direction by abutting on the urging member.