JPH0258699B2 - - 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 suitable for automatically retracting and mounting a cassette using power assist.

In a conventional cassette mounting device that retracts and installs a cassette using power assist, the cassette mounting method is such that the cassette is always biased by a spring in the non-mounting direction, and when it is mounted, the cassette is pushed down against that bias and the cassette is pressed down. There are methods that apply pressure to the cassette as well as methods that apply pressure to the cassette when the cassette is lifted, and methods that use a spring to constantly bias the cassette in the mounting direction and use that bias to apply pressure to the cassette. Furthermore, since the load is increased and the cassette pressing force must be exerted, the load when attached is considerably large.Also, the load when attached is not as large as the former, but the opposite is true when it is not attached. As the load increases, a high load is applied to the holding part that holds the non-mounted position, which has the drawback of causing a negative effect on cassette ejection.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a cassette mounting device for a cassette tape recorder that automatically retracts and mounts a cassette tape recorder by applying a cassette pressing force only when the cassette is mounted.

For this reason, the present invention provides a power assist actuation lever that retracts and installs the cassette and moves the head plate forward, since trying to apply a cassette pressing force using a spring force that is constantly biased in the cassette installation direction will result in a load for ejecting the cassette. A leaf spring is provided so that a pressing force on the cassette is exerted by the stroke of advancing the head plate when the cassette is attached, so that the pressing force on the cassette is exerted only when the cassette is attached.

Embodiments of the present invention will be described below with reference to the drawings. First of all, FIG. 1 shows a schematic diagram of this embodiment, in which a motor 2 attached to a chassis 1 and a cassette storage frame member 4 for storing and guiding a cassette 3 are suspended and the cassette is raised and lowered between the non-mounted and mounted positions. A hanging plate member 5 is pivotally supported by cassette hanging plate shafts 6a and 6b and is rotatably attached. A long groove 5a is provided in the center of the cassette hanging plate member 5 in the cassette insertion direction, and a cassette engaging piece 7 whose one end can be engaged with the reel die hole of the cassette 3 is slidably attached. ing. The guide pin 8 of the cassette engaging piece 7 is connected to the cassette hanging plate member 5.
One elongated hole 9a of the cassette operating rod 9 provided above
The cassette operating rod shaft 1 is engaged with the
0 is the pivot axis. Further, there is another elongated hole 9b near the center of the cassette operating rod 9, which engages with an engagement pin 12 of a first power assist operating rod 11, which will be described later. A power assist operating rod holding member 13 is located beside these cassette mounting mechanisms.
The first power assist operating rod 11, which is fixed to the chassis 1 and slidably attached to the power assist operating rod holding member 13, is biased in the cassette ejection direction by the first return spring 14, and its tip is bent. A power switch 15 attached to the power assist operating rod holding member 13 by a portion 11a.
Press to turn it OFF.

Next, a power assist locking means 16 is provided in a space between the cassette mounting mechanism and the motor. A tension spring 17 is stretched between the cassette suspension plate member 5 and the chassis 1, and urges the cassette suspension plate member 5 in the cassette mounting direction. Next, the power assist operation will be explained with reference to FIG. 3. First, the intermediate gear 2 meshes with the small diameter gear of the pulley gear 20 which is interlocked with the motor pulley 18 which rotates integrally with the motor 2 and the belt 19.
1 are constantly rotated by motor 2. The power assist gear 22 has a toothless portion at a position where it can freely mesh with the small diameter gear 21a of the intermediate gear 21. Normally, the toothless portion 22a faces the intermediate gear small diameter portion 21a and cannot mesh with the power assist gear 22. Also, a stop pin 22b is integrally formed on the lower surface of the power assist gear 22, and a power assist gear biasing spring 23 comes into pressure contact with the stop pin 22b to urge the stop pin 22b in the clockwise direction, and also comes into contact with a stop lever 24, which will be described later, to maintain the stop position. . On the other hand, the power assist gear 2
A roller pin 25 is integrally provided on the upper surface of 2. Next, the stop lever 24
The first arm part 24a has an arm extending in the direction in which it is rotatably attached to the chassis 1.
is the stop pin 2 of the power assist gear 22.
2b, and also comes into contact with the boss of the rotation shaft 26 of the gear 22 to act as a stopper for counterclockwise biasing force. Further, the third arm portion 24c has a pin 27 erected at its tip and protrudes. Next, the power assist operating means will be explained with reference to FIG.

The first power assist operating rod 11 is connected to the guide pin 2 on the power assist operating rod holding member 13.
Guided by 8,29. The first return spring 14 is stretched between the spring-loaded bent portion 11b of the first power-assist lever 11 and the spring-loaded portion 13a of the power-assist lever holding member 13. Further, a second power assist operating rod 32 is slidably guided by the other guide pins 30 and 31 of the power assist operating lever holding member 13.
has a spring-loaded bending portion 32a;
A second return spring 33 is stretched between the other spring-loaded bent portion 11c of the power assist operating rod 11, and the spring bent portion 32a and the engaging portion 11d of the first power assist operating rod 11 engage with each other. They are attracted to each other. At this time, the relationship between the first return spring 14 and the second return spring is
The load of the second spring 33 is set to be larger than the load when the spring is fully extended by the first power assist operating rod 11. Further, the second power assist operating rod 32 includes a cam member having a first plane part 34a for controlling the cassette non-mounting position and the cassette mounting position of the cassette suspension plate member 5, and a first slope part 34b continuing from the first plane part 34a. 34 is integrally attached with a mounting screw 35, and the first slope portion 34
A cassette support rotation spring 37, which is an elastic member which is rotatable around a pin 36 and whose arm portion 37a has elasticity and is biased counterclockwise, is provided near b. There is a pressing bending portion 37b for pressing the position control pin 38 of the cassette suspension plate member 5, and counterclockwise biasing is regulated by the protrusion 32b of the second power assist operating rod 32. Next, the operating portion and engaging portion of the power assist operating rod 32 will be explained. First, there is a stop lever operating portion 32c that engages with the pin 27 of the stop lever 24 shown in FIG. 3 to release the lock. A first engaging portion 32d is disposed at a position where it engages with a roller pin 25 provided on the gear 22, and a second engaging portion 32e and a third engaging portion 32f are provided on the other side, respectively, and perform operations to be described later.

Next, the relationship between the second power assist operating rod 32 and the power assist locking means 16 shown in FIG. 6 will be explained. These power assist locking means 16 are respectively disposed on power assist locking mounting plates 39 attached to the chassis 1. First, a rotatable power assist locking lever 40 is connected to the second power assist operating rod 32 at one end. An engagement groove 40a to be engaged with the second engagement portion 32e of the first engagement groove 40a is provided in the engagement groove 40a.
There is an engagement surface 40aa and a second engagement surface 40ab. The power assist locking lever 40 also has a locking lever spring 41 stretched over its spring hook 40b.
A locking pin 42 is installed at the other end and is locked by a locking sliding rod 43, which will be described later. Also, the power assist locking lever 40
The engaging bent portion 40c of the power assist gear 2
It enters within the rotation range of the second roller pin 25 and is positioned so as to be able to engage with the second roller pin 25. Next, the lock pin 42 of the power assist locking lever 40
A first locking portion 43a and a second locking portion 4 that lock the
The locking sliding rod 43 having one end 3b is connected to the guide bends 39a, 3 of the power assist locking mounting plate 39.
9b, and a part thereof engages with the magnetic rotating lever 44, and the magnetic lever spring 45 biases the magnetic rotating lever 44 clockwise, thereby locking and sliding. The rod 43 is also urged to slide in the direction of the power assist locking lever 40. On the other hand, the other arm portion 44b of the magnetic rotation lever 44 is connected to an electromagnet 46.
The suction piece and the power assist locking lever 4
When the lever is locked at 0, the electromagnet 46 attracts the arm 44b of the magnetic rotating lever 44 to maintain the locked state.

Next, the head plate advancing mechanism will be explained with reference to FIG. First, when the head plate 50 on which the magnetic head 47 is placed and is slidable while being guided by the guide pins 48 and 49 on the chassis 1 slides forward, the FORWARD side capstan 51 enters the PLAY state in the usual manner; A pinch roller member 52, a winding arm member 53, and a reel die 54 are provided, and a REVERSE side capstan 55, a pinch roller member 56, a winding arm member 57, and a reel die 58 are provided, respectively.

On the other hand, a power assist interlocking rod 61 that is slidably guided by guide pins 59 and 60 of the chassis 1 in a direction orthogonal to the sliding direction of the head plate 50 has a third connecting portion 32f of the second power assist operating rod 32. A first engaging portion 61a is provided to be able to engage with the first engaging portion 61a, and is positioned to slide in conjunction with the sliding movement of the second power assist operating rod 32. Also, the power assist interlocking rod 6
1 has an engagement pin 61b of a second engagement part planted therein,
It engages with a long groove 63a having a cam portion provided on the other side of a rotatable head plate operating plate 63 whose one end is pivotally supported by the shaft 62 of the chassis 1. Further, a pivot lever 65 is attached near the pivot hole of the head plate operating plate 63 and is rotatable about a pin 64, and the other end is connected to the engagement oval hole 50a of the head plate 50. An engaging pin 66 is set up for engagement, and a suction spring 67 is provided between the head plate operating plate 63 and the engaging portions 63b and 65a of each other to store suction force. At this time, the head plate 50 is moved forward by the sliding operation of the power assist interlocking rod 61, and the forward movement is stopped by the guide pin 48.
When the head plate is brought to the PLAY position, the power assist interlocking rod 61 is advanced a little further, the suction spring 67 is extended, and the load of the suction spring is set so as to maintain the head plate in the PLAY position.

Next, FIG. 7 will be explained. First, Figure 7-A is a diagram before the cassette is inserted, and shows the cassette engaging piece 7.
has a cassette engaging portion 7a at one end thereof to engage with the cassette, and the other end has an engaging bent portion 7b formed on the cassette entry surface of the cassette storage frame member 4, and has a central portion thereof. The guide pin 8 and the guide bending portion 7c are provided, and the cassette hanging plate member 5
Although the cassette engaging piece 7 is guided by the long groove 5a and is slidable, the bent guide portion 7c rides on the stepped guide portion 5b of the cassette hanging plate member 5 when the cassette engaging piece 7 is in the cassette ejection state position. The cassette engaging portion 7a of No. 7 is lifted clockwise, and when the cassette is inserted, the cassette engages with the inclined surface of the cassette engaging portion 7a, so that the cassette can be inserted correctly.

Next, the operation will be explained. First, when the cassette 3 is inserted as shown in FIG. 1 and FIG. 7-A, the cassette 3 pushes aside the engaging portion 7a of the cassette engaging piece 7 and enters into contact with the engaging bent portion 7b, causing the cassette to engage. Start sliding the piece 7. By this sliding, the cassette engaging piece 7 is moved to the guide stepped portion 5b of the cassette hanging plate 5.
In order to remove it, insert it correctly into the reel die hole of cassette 3. At this time, the cassette operating rod 9 rotates in conjunction with the sliding of the cassette engaging piece 7, so that the first power assist operating rod 11 also operates.
As a result of this operation, the engaging portion 11d of the power assist actuating rod 11 pushes the spring bent portion 32a of the second power assist actuating rod 32, as shown in FIG. By operating the second power assist operating rod 32, the stop lever operating portion 32c of the operating lever 32 rotates the stop lever 24 clockwise against the biasing force thereof, thereby releasing the restriction on the rotation of the power assist gear 22. Due to this restriction being lifted, the gear 22 is activated by the power assist gear biasing spring 23.
The small diameter gear 21 of the intermediate gear 21 rotates with the urging force of
It engages with a and starts power assist. By starting this power assist, the power assist gear 2
The second roller pin 25 rotates and engages with the first engaging portion 32d of the second power assist operating rod 32, thereby causing the operating rod 32 to slide. At this time, the second power assist operating rod 32 moves the first power assist operating rod 11 to its first position via the second spring 33.
The cassette 3 is slid against the spring 14, and the cassette operating lever 9 and the cassette engaging piece 7 are actuated to draw the cassette 3. This retraction is shown in Figures 5-B and 7-
The position shown in Figure B, that is, the first power assist operating rod 1
The sliding end position of No. 1 is the retracting end position of the cassette 3. At this time, the position control pin 38 of the cassette suspension plate member 5 is still connected to the second power assist operating rod 32.
Since the cassette 3 is located on the first plane portion 34a of the cam member 34, the cassette 3 does not fall. At this time, the second engaging portion 32e of the second power assist actuating member 32 is in the sixth position.
- The power assist locking lever 40 is rotated against the spring force by contacting the first slope 40aa of the engagement groove 40a of the power assist locking lever 40 shown in Figure A, and when the locking lever 40 is further rotated, the second The engaging portion 32e is the sixth
- It enters into the engagement groove 40a as shown in Figure B. When the power assist gear 22 further rotates and the roller pin 25 disengages from the first engaging portion 32d of the second power assist operating rod 32, the lock pin 42 of the power assist locking lever 40 engages the locking lever 40. First locking portion 43 of operating rod 43
Since the locking sliding rod 43 is rotated beyond the angle a, the electromagnet 46 is rotated beyond the magnet rotation lever 44.
The position is fixed by adsorption. Thereupon, the engagement is disengaged, and the locking lever 40 is returned counterclockwise by its locking lever spring 41, so that the locking pin 42 of the locking lever 40 is moved to the first position of the locking sliding rod 43.
It is primarily locked by the locking part 43a, and the second engaging part 32e of the second power assist operating rod 32 is also locked by the second slope 40ab of the engaging groove 40a of the power assist locking lever 40. . Also, in this primary locking state, the second power assist actuating rod 32 moves further forward than the state shown in Figure 5-B, and the second power assist actuating rod 32 moves forward while holding the first power assist actuating rod 11 at the sliding end position.
Stretch the spring 33 further. On the other hand, the position control pin 38 of the cassette suspension plate member 5 slides down the first slope of the cam member 34 of the second power assist actuating rod 32, so that the cassette is attached. Also, at this time, the cassette hanging plate member 5 is rotated by the tension spring 17 as shown in Fig. 7-c and presses the cassette storage frame member 4 to achieve the cassette installed state, but the cassette is not moved from the non-installed position to the installed position. When rotating, the cassette engaging piece 7 on the cassette hanging plate member 5
The cassette operating rod 9 also rotates about the cassette hanging plate shafts a and 6b together with the hanging plate member 5.
The engaging piece 7 on the hanging plate 5 and the operating rod 9 are attached to the support shaft 6.
Since it is located above a and 6b, it attempts to rotate in the cassette ejection direction, but since the cassette operating rod 9 is engaged with the engagement pin of the power assist operating rod 11, rotation is prevented. However, a relief part 5c is provided in the cassette hanging plate member 5 so that the cassette engaging piece 7 can be slid beyond the cassette retraction end position shown in FIG. It is configured so that it will not cause any damage.

Next, the operation after the primary locking is shown in Figures 6-B and 6.
-Explain using diagram C. Now, when the power assist gear 22 rotates further from FIG. 6-B, the roller pin 25 of the gear 22 comes into contact with the engagement bent portion 40c of the power assist locking lever 40, causing the locking lever 40 to rotate. . This rotation causes the locking pin 42 of the locking lever 40 to release the lock release slope 4 following the second locking portion 43b of the locking sliding rod 43.
3c is pushed against the attraction force of the electromagnet 46 to mechanically release the attraction state between the electromagnet 46 and the rotary lever 44. When the power assist gear further rotates and the engagement bending portion 40c of the power assist locking lever 40 is disengaged from the roller pin 25, the lock pin 42 of the locking lever 40 is moved to the second position of the locking sliding rod 43. Since it has rotated beyond the locking portion 43b, even if the lock is released, it is returned by the locking lever spring 41 and is locked by the second locking portion 43b. At this time as well, the second power assist operating rod 32 is slid forward and locked by the second slope 40ab of the engagement groove 40a of the power assist locking lever 40. At this time, the position control pin 38 of the cassette suspension plate member 5 is pressed by the cassette support rotation spring 37 attached to the second power assist operating rod 32 shown in FIG. 5-C. Pressure is applied. Further, due to the sliding of the second power assist actuating rod 32 after the first locking, the third engaging portion 32f of the actuating rod 32 engages with the first engaging portion 61 of the power assist interlocking rod 61 as shown in FIG.
The second interlocking rod 61 is slid forward in contact with a.
The head plate operation plate 63 is rotated by the engagement pin 61b of the engagement portion, and the head plate 50 is advanced through the rotation lever 65 to achieve the PLAY state, and the head plate 50 is moved to the PLAY state at the position shown in FIG. 6-C. 2 is locked and the cassette installation is completed. Also, the cassette is ejected using the electromagnet 46.
It is obvious that by turning OFF, the respective spring biasing forces operate in sequence and the cassette is ejected.

As described above, according to the present invention, the cassette pressing force is applied only when the cassette is attached, and is free when the cassette is not attached, so that it is possible to reduce the operating force without applying an extra load, and to achieve stable operation. A cassette mounting device can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an outline of an embodiment of the present invention;
Fig. 2 is a plan view of the cassette retracted state, Fig. 3 is a plan view of the head plate advancement mechanism, Fig. 4 is a plan view of the head plate advancement mechanism in the PLAY state, and Fig. 5 is an explanation of the operation of the power assist operating rod. FIG. 6 is a plan view for explaining the operation of the power assist locking means, and FIG.
The figure is a side view for explaining the side operation of mounting a cassette. 2... Motor, 4... Cassette storage frame member, 5... Cassette hanging plate member, 11... First power assist operating rod, 22... Power assist gear, 32... Second power assist operating lever, 34... Cam member, 37... Cassette Osae rotation spring, 38...Position control pin, 5
0...Head board.

Claims (1)

[Claims] 1 A rotatable cassette hanging plate member 5 that raises and lowers a cassette storage frame member 4 that stores and holds a cassette 3 of a cassette tape recorder between a non-mounted position and a mounted position, and a drive gear member 22 driven by a motor 2. In a cassette tape recorder having power assist actuating rod members 11 and 32 that slide to perform the cassette retracting and mounting operation and the forward movement of the head plate 50, the power assist actuating rod members 11 and 32 include the cassette hanging plate. A cam member 3 that engages with the position control pin 38 of the member 5 to guide the cassette 3 to the non-mounted position or the mounted position.
4 is integrally provided, and the position control pin 38
A cassette mounting device for a cassette tape recorder, characterized in that a holding means 37 made of an elastic member is also integrally provided for engaging with the cassette 3 to press and hold the cassette 3 in the mounting position.