JP3024722B2 - Cassette tape mounting device in tape deck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape deck, and more particularly, to a cassette tape mounting device for inserting and discharging a cassette tape.

[0002]

2. Description of the Related Art Conventionally, as a cassette tape mounting apparatus of this type, for example, the apparatus shown in FIGS. 16 to 18 is known. In FIG. 16, reference numeral 10 denotes a cassette guide. The cassette guide 10 is composed of a pair of side plates attached substantially vertically to both side ends of a bottom plate of the chassis 11 with screws or the like. The side plates are held at predetermined positions by a top plate 39. I have. A right angle guide groove 14 is formed in the cassette guide 10, and a pin 15 of a cassette slider for feeding a cassette tape is slidably engaged with the guide groove 14.

When the cassette tape 16 is inserted into the cassette guide 10 as shown in FIG. 16 and is pushed by a small dimension D as shown in FIG. 18, the pin 15 of the cassette slider advances along the guide groove 14, thereby The driving gear 20 rotates clockwise about the shaft 21 via the arm 18, the interlocking gear 22 that meshes with and interlocks with the driving gear 20 rotates counterclockwise, and the rack 23 moves to the left. At this time, the groove 2 in the locking piece 24 formed at one end of the rack member
After the rack 23 has been moved by the section of the minute dimension E between the pin 5 and the drive pin 26, the locking piece 24 is locked to the drive pin 26 as shown in FIG. Since the rack 23 is stretched by the rack spring 27, while the cassette tape 16 moves from the state of FIG. 16 to the state of FIG. 18, the rack spring 27 is further stretched in accordance with the amount of movement and the tension is pulled. The force increases, and the force for pushing out the cassette tape 16 is working. When the rack 23 moves to the left, the detection switch 28 is turned on by the convex portion 30, whereby the power of the motor is turned on, and the disk cam 31 of FIG. 17 rotates to perform the operation of drawing in the tape.

[0004]

However, in the conventional tape deck as described above, the detection switch 2
Until the switch 8 is turned on, the operator needs a force to push the tape against the rack spring 27. When the detection switch 28 is turned on, a pulling force is suddenly applied to the cassette tape. There was a problem in that the force of pressing was stronger and the insertion feeling felt by the hand was poor.

The present invention has been made in view of such a conventional problem. By improving a spring, a force is applied to a cassette tape in a discharge direction and a pull-in direction. An object of the present invention is to provide a tape deck having an improved insertion feeling by giving an appropriate insertion feeling.

[0006]

According to the first aspect of the present invention,
A spring having an arcuate portion that abuts on a pin of a cassette slider attached to the drive gear, a drive lever having a locking pin that fits tightly with a rack that meshes with the drive gear, and a drive lever that drives the motor to drive the drive lever. A driving cam is provided, and the pin is pushed back by the arc-shaped portion until a pull-in force by a motor is applied to the cassette tape via the cam, the driving lever, and the driving gear.

According to a second aspect of the present invention, there is provided a drive lever provided with a locking pin which fits into a rack engaged with a drive gear without any gap, and a bent portion which comes into contact with a cam pin fixed to the drive lever. And a cam that drives the drive lever by driving a motor. The cam pin is bent at a bent portion until a pull-in force by a motor is applied to the cassette tape via the cam, the drive lever, and the drive gear. Is pushed back.

[0008]

According to the first aspect of the present invention, the arc-shaped portion of the spring which abuts the pin of the cassette slider against the pin works to push it back when the tape is inserted, but is driven by the motor via the cam, the drive lever and the drive gear. When the cassette tape is pulled in, the pin escapes from the arc-shaped portion, and a pulling-in force acts via the cam, the driving lever and the driving gear by the driving force of the motor. According to the second aspect of the present invention, the bent portion of the spring which comes into contact with the cam pin fixed to the drive lever works to push it back when the cassette tape is inserted, but is driven by the motor via the cam, the drive lever and the drive gear. When the cassette tape is pulled in, the cam pin escapes from the bent portion, and further, a pulling force acts via the cam, the driving lever, and the driving gear by the driving force of the motor.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 are views showing one embodiment of the tape deck according to the first aspect of the present invention. First, the configuration will be described. The same members as those in FIGS. 16 to 18 are denoted by the same reference numerals. In FIG. 1, reference numeral 11 denotes a chassis of the cassette tape deck according to the present invention. A cylinder head 32 is attached to a rear portion of the chassis 11, and rectangular cassette guides 10 are attached to both ends of the chassis 11. Reference numeral 31 denotes a disk-shaped cam. The cam 31 is rotated forward or backward by the forward / reverse rotation of a motor (not shown).
The cassette tape 16 is inserted and ejected from the front of the camera, and a mode switching lever (not shown) is reciprocated in the left-right direction to perform a mode switching operation among a recording mode, a reproducing mode, a fast-forward mode and a reverse mode. I have.

In FIG. 2, a motor holder 12 is fixed to the cassette guide 10 and the chassis 11 with screws 13 or the like. A right-angled guide groove 14 is formed at the front of the cassette guide 10, and a pin 15 formed on a side plate of a U-shaped cassette slider for feeding a cassette tape is slidable in the guide groove 14. Is engaged. A shaft 21 fixed to the front of the cassette guide 10
A drive gear 20 is rotatably attached to the arm. The pin 15 is engaged with a tip of an arm 18 integrated with the drive gear 20. A spring 34 is wound around a boss 33 attached to the arm 18, and the pin 15 projects between both ends of the spring 34 that are substantially parallel and extend outward. One linear end of the spring 34 is arranged in front of the pin 15 so that the pin 15 is pressed and moved along the groove 14 when the cassette tape 16 is inserted. The other end of the spring 34 is disposed on the rear side of the pin 15, and an arc-shaped portion 35 protruding toward the pin 15 is formed at the tip end thereof. Is formed. Before the cassette tape 16 is inserted, the pin 15 is in contact with the outside of the arc-shaped portion 35 formed at the end of the spring 34.

The driving gear 20 has a triangular interlocking gear 22.
And the linear rack 23 are engaged with each other. This rack 23
Is slidably mounted on the cassette guide 10, and the locking portion 24 at the rear end thereof is
7 is fitted without any clearance to the drive pin 26 fixed thereto. In FIG. 3, a cam pin 38 is fixed to the cassette drive lever 37, and the cam pin 38 passes through a cam groove 40 of the disc-shaped cam 31. The cassette driving lever 37 is supported by the chassis 11 by the shaft 41 and can swing about the shaft 41 by the forward / reverse rotation of the cam 31. The cassette driving lever 37 moves the rack 23 in the front-rear direction via the pin 15 and inserts the cassette tape 16. It has been made removable.

A boss 42 erected on the upper portion of the cam 31 supports a swinging piece 43 of a different shape so as to be swingable. On the inner peripheral edge of the rocking piece 43, a short rib 44 for guiding the cam pin 38 into the cam groove 40, and a rib end formed to protrude from the rib 44 with a gap 44A and connectable to a rib end 40a forming the cam groove 40. An arc-shaped long rib 45 having 45a is formed. The hook 4 formed on the rocking piece 43
A tension spring 48 is hung between the pin 6 and the pin 47 formed on the cam 31 so that the swinging piece 43 is locked by the peripheral rib 49 of the cam 31 as shown in FIG. .

Next, the operation will be described. When the cassette tape 16 is pushed in by a small dimension D as shown in FIG. 4 from the initial state of FIG. 2, the pins 15 of the cassette slider move along the guide grooves 14 of the cassette guide 10 in synchronization with the tape. The spring 34 attached to the arm 18 of the drive gear 20 moves from the outside of the other end of the spring 34 to the arc-shaped portion 35 side, and pushes the arc-shaped portion 35 backward. As a result, the drive gear 20 rotates clockwise through the arm 18 and the rack 23 moves to the left, and the detection switch 2
8 is turned on, the power is turned on to the motor, and the cam 31 starts rotating. At this time, until the detection switch 28 is turned on, the arc-shaped portion 35 of the spring 34 works to push the cam pin 15 back and push out the tape 16 with an appropriate pressing force. However, as shown in FIG. 4, the detection switch 28 is turned on. When the cassette slider is retracted, the pin 15 is
Move from 5 to the recess 36 to release the pin 15. That is, when the cassette tape 16 is pushed in by hand, the pushing force generates an appropriate pressing force by the arc-shaped portion 35 of the spring 34, and when the pin 15 moves from the arc-shaped portion 35 along the recess 36, the pushing force of the motor is reduced. Since the force smoothly changes, the feeling of inserting the cassette tape is improved.

In FIG. 5 to FIG. 7, when the rack 23 turns on the detection switch 28 and the motor is turned on,
The cam 31 starts to rotate clockwise. At this time, the cam pin 38 has moved to the position of the cam pin 38 in FIG. When the cam 31 further rotates, the cam pin 38 becomes
7, the swinging piece 43 pivots counterclockwise about the shaft 42 and hits a rib end 40a provided on the cam 31 as shown in FIG.
Moves in synchronization with the cam curve, and the rack 23 moves forward by the swing of the drive lever 37 to draw in the cassette tape. When the cam pin 38 passes through the rib 45 of the rocking piece 43, the rocking piece 43 returns to the original position by the spring 48.

8 and 9, when the cam 31 rotates counterclockwise, the rocking piece 43 is in its original position by the spring 48, so that the cam pin 38 hits the inside of the rib 45 and moves in synchronization with the cam curve. Then, the drive lever 37 rotates about the shaft 41, and the rack 23 is slightly pulled back. Then, the cam pin 38 returns to the position shown in FIG. 3 through the gap 44A.

FIGS. 10 to 13 show one embodiment of the tape deck according to the second aspect of the present invention. In FIG. 11, a boss 50 is erected integrally with the cam 31 and this boss 5
The spring 51 is attached to the zero. This is a case where the bent portion 52 at the tip of the spring 51 is in contact with the cam pin 38.
The bent portion 52 is connected to the cassette tape 16 via the cam pin 38.
Are formed so as to apply a force in the discharge direction and a force in the pull-in direction. And the conventional spring 34
Except that the rack spring 27 and the rack spring 27 have been deleted, the same reference numerals are used as in the first embodiment of the present invention.

Next, the operation will be described. Cassette tape 16
Is inserted by a small distance D shown in FIG. 12, the rack 23 moves to the left via the drive gear 20, and the drive lever 3
7 swings about the shaft 41, and the cam pin 38 pushes the spring 51 as shown in FIG. At that time, the detection switch 28
Until is turned on, the spring 51 pushes back the cam pin 38 and works to push out the cassette tape 16. When the detection switch 28 is turned on, the bent portion 52 at the tip of the spring 51 releases the cam pin 38, and the cam 31 rotates the clock. It turns into a force to draw in the cassette tape 16 by rotating in the direction. Therefore, the transition from the pushing force to the pulling force is smooth, and the feeling of insertion is improved.

When the cam 31 is further rotated clockwise, the cam pin 38 is moved to the rib 45 as shown in FIG.
, The swinging piece 43 is rotated counterclockwise about the shaft 42 and guided into the rim groove 40 through the rib end 45a connected to the rib end 40a. When the cam 31 rotates counterclockwise, the cam pin 38 passes through the inside of the rib 45 of the swinging piece 43 restored by the tensile force of the tension spring 48 as shown in FIG. Back.

[0019]

As described above, according to the first aspect of the present invention, an arc-shaped portion is formed on a spring for urging a pin of a cassette slider, so that when a cassette tape is inserted, a force is applied in a discharging direction. An appropriate feeling of insertion is given, and when it is pushed further, it changes into a pulling force, and the feeling of insertion can be improved.

According to the second aspect of the present invention, the same good feeling of insertion can be obtained by forming a bent portion on the spring for urging the cam pin of the drive lever.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a tape deck according to the first aspect of the present invention.

FIG. 2 is a partial side view of the embodiment shown in FIG.

FIG. 3 is a plan view of the cam of the embodiment shown in FIG. 1;

FIG. 4 is a side view of the embodiment shown in FIG. 1 in an operating state.

FIG. 5 is a plan view of a cam portion in the operating state of FIG. 4;

FIG. 6 is a side view of another operation state of the embodiment shown in FIG. 1;

FIG. 7 is a plan view of the cam in the operating state of FIG. 6;

FIG. 8 is a side view of the embodiment shown in FIG. 1 in still another operation state.

FIG. 9 is a plan view of the cam in the operating state of FIG. 8;

FIG. 10 is a side view showing an embodiment of the tape deck according to the second aspect of the present invention.

FIG. 11 is a plan view of the cam of the embodiment shown in FIG.

FIG. 12 is a side view of the operation state of the embodiment shown in FIG. 10;

FIG. 13 is a plan view of the cam of FIG.

FIG. 14 is a plan view showing another state of the cam of the embodiment shown in FIG. 10;

15 is a plan view of still another state of the cam of the embodiment shown in FIG.

FIG. 16 is a side view of a conventional tape deck.

FIG. 17 is a plan view of the cam portion of FIG.

FIG. 18 is a side view of the operation state of FIG.

[Explanation of symbols]

 15 pin 20 drive gear 23 rack 37 drive lever 26 locking pin 34 spring 35 arcuate part 38 cam pin 51 spring 52 bent part

Claims (2)

(57) [Claims] 1. A spring having an arcuate portion abutting on a pin of a cassette slider attached to a drive gear, a drive lever having a locking pin fitted into the rack meshing with the drive gear without any gap, and driving of the motor. Drive
And a cam for driving the bars, the mosquito cassette tape
A pin that is pushed back by an arc-shaped portion until a pull-in force is applied by a motor via a motor , said drive lever, and said drive gear . 2. A motor having a drive lever provided with a locking pin fitted into a rack engaged with a drive gear without any gap, a spring having a bent portion abutting on a cam pin fixed to the drive lever, and a motor A drive that drives the drive lever by driving
The cam and the drive lever are provided on a cassette tape.
A cam pin is pushed back at a bent portion until a pull-in force by a motor is applied through the drive gear and the driving gear .