JPH0422428Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a cassette loading device that moves a tape cassette placed on a mounting table between insertion and mounting positions.

(b) Conventional technology As a conventional technology for moving a tape cassette placed on a mounting table between insertion and mounting positions, for example, FISHER's video model FVH-
P905K's "PARTS LIST &SCHEMATIC"
The structure of page 5 of ``DIAGRAM'' is presented,
The configuration will be explained below.

FIG. 3 is an exploded perspective view showing a conventional cassette loading device, and FIGS.
1 is a side view of the main parts of the cassette loading device assembled in the figure. To explain the figure number and structure, 1 is a side view of the main parts of the cassette loading device assembled in the figure. Fixing metal fitting 11 has screw holes 6, 7, insertion holes 8, 9, and locking groove 10 to be inserted, guide grooves 12, 13, mounting groove 14, insertion holes 15, 16, 17, 18, Screw hole 20a into which the screw 19 is screwed through the insertion hole 8
a protrusion 20 having a screw 2 through the insertion hole 9;
a protrusion 22 having a screw hole 22a into which the screw 1 is screwed;
One side plate 24 consisting of a locking pawl 23 that locks in the locking groove 10 is connected to one guide piece 25, 26 guided in the guide grooves 12, 13, and the other side plate (not shown). A mounting table 28 has another guide piece (not shown) guided by a guide groove (not shown) on its side surface, on which the tape cassette 27 is placed; The drive shaft 3 has screw holes 31 and 32 into which the screws 29 and 30 are screwed.
3 is a motor to which a pulley 34 is connected; 35 is a motor to which a pulley 36 is connected at one end and a worm gear 37 at the other end; the one end is fixedly placed in the mounting groove 14, and the other end is a washer. 38 is a shaft inserted into the insertion hole 17; 39 is a belt hung between the pulleys 34 and 36; 40 is a gear portion 41; protrusions 42 and 4;
3, and an insertion hole 44a into which the protruding piece 20 is inserted.
A rotating body 45 consisting of a protrusion 44 having a gear portion 46, protrusions 47, 48, fitting holes 49, 50 into which the protrusions 42, 43 are fitted, and a fitting hole 52 into which the guide piece 26 is fitted. , and a protrusion 51 having an insertion hole 51a into which the protrusion 44 is inserted.The other side plate is also provided with a rotation arm, and 53 extends along the protrusion 48. a spring latched to the protruding pieces 43, 47;
54 is a gear coupled to a shaft 55 that transmits a driving force to the structure on the other side plate side through the insertion hole 18; 56 has an insertion hole 57 into which the projection piece 22 is inserted; Gear meshing with 41,
58 is a gear portion 59 that meshes with the gear portions 41 and 46 and the gear 54, a regulating protrusion 60, a protruding piece 61,
A rotating body 63 consisting of an insertion hole 62 into which the protruding piece 22 is inserted includes a protruding part 64 disposed within the regulating protruding part 60, a protruding piece 65, and the protruding piece 22.
It has an insertion hole 66a into which is inserted, and a protrusion 66 which is inserted into the insertion holes 57 and 62,
A gear meshing with the worm gear 37, 67 a spring hooked to the protrusions 61 and 65 along the regulating protrusion 60, 68 an upper plate disposed on the side plate 11, 69 a cabinet, and 70 a spring. This is a front panel having an insertion opening 70a for the tape cassette 27.

The cassette loading operation will be explained using FIGS. 3 and 4. First, the tape cassette 27 is inserted through the insertion port 70a and placed on the mounting table 24.
When pressed further, the guide pieces 25 and 26 are guided in the direction A through the guide grooves 12 and 13, respectively. Due to this guidance, the insertion hole 52 is pressed by the guide piece 26, and the rotating arm 45 and the rotating body 40 are rotated clockwise around the protruding piece 20 while being elastically held by the spring 53, and the rotating body 58 is rotated clockwise by the spring 53. The gear 54 rotates counterclockwise around the protrusion 22 against the elastic force of the gear 67, and the gear 54 further rotates clockwise around the shaft 55. When the protruding piece 42 separates from the contact switch 2 due to the rotation of the rotating body 40, the contact switch 2 is turned off, the motor 28 is driven by a control signal from the system control, and the gears 56 and 63 move around the protruding piece 22. Rotate counterclockwise.

Due to this rotation, the p part of the regulating protrusion 60 and the protruding part 64 are brought into contact with each other by the elastic force of the spring 67, and the rotating body 58 and the gears 56, 63 are rotated counterclockwise around the protruding piece 22. , the rotational force is further transmitted, and the gear 54 rotates clockwise around the shaft 55, and the rotation arm 45 and the rotation body 40
The projecting piece 2 is held elastically by the spring 53.
0 in the clockwise direction, and the mounting table 24
The tape cassette 27 placed on
move in the direction.

After this movement, the rotation of the rotation arm 45 is completed, but the rotation body 40 further rotates clockwise against the elastic force of the spring 53, so that the tape cassette 27 is pressed into the mounting position. When the protruding piece 42 presses the contact switch 3, the contact switch 3 is turned on and the rotation of the motor 28 is stopped in response to a control signal from the system control, thereby completing the cassette loading operation.

(c) Problems to be solved by the invention When ejecting the tape cassette 27 held in the mounting position from the insertion slot 70a, it is sufficient to perform the operation opposite to the above-mentioned cassette loading. The problems that arise will be explained using FIGS. 5 and 6.

Tape cassette 27 moving in direction C in Fig. 5
Press the tape cassette 27 in the direction A in Fig. 6.
The rotating body 40 and the rotating arm rotate counterclockwise around the protruding piece 20 in the reverse operation described above at the position immediately before the contact switch 2 is turned on by being pressed by the protruding piece 42. Let us consider the case where 45 has stopped.

In this case, since the contact switch 2 is off, the motor 28 continues to be driven, and the rotating body 40
Since the rotating arm 45 stops, the rotating body 5
8 also stops. Then, until this state is detected by the system control and the motor 28 is stopped, the gear 63 resists the elastic force of the spring 67 and the protrusion 22
Overrun clockwise around . However, in the overrun, the protrusion 64 is not connected to the regulation protrusion 60
The rotating body 58 rotates slightly clockwise about the protrusion 22, and the rotating body 40 and the rotating arm 45 rotate slightly counterclockwise about the protrusion. As shown in FIG. 6, the contact switch 2 is pressed by the protrusion 42 and turned on.

As a result, even if the tape cassette 27 is pressed in the C direction from the above state, since the q part of the regulating protrusion 60 and the protruding part 64 are in contact with each other, the rotating body 4
0, 58 and the rotating arm 45 are disabled, the contact switch 2 is not turned off, and the motor 28
There was a problem that the motor was not driven.

(d) Means for solving the problem The present invention was made to solve the above problem, and includes a first rotary body to which driving force is transmitted, and a rotary member coaxial with the first rotary body. a second rotating body that is elastically held by an elastic body; and rotation of the first and second rotating bodies when they rotate in relatively different directions against the elastic force of the elastic body. A regulating part that regulates the range and a pair of guide pieces provided on both sides of the mounting table are fitted into the fitting parts through a pair of guide grooves provided on both side plates, and the rotational force of the second rotating body is a pair of rotating arms that are configured to be able to move the tape cassette placed on the mounting table between the insertion and mounting positions by being transmitted and guiding the pair of guide pieces in synchronization with the second rotating body; In a magnetic recording and/or reproducing machine comprising: , the first rotating body is provided with a projecting piece, and the rotating arm is provided with an abutting piece with which the projecting piece abuts.

(E) Effect According to the present invention, a first rotating body to which driving force is transmitted, a second rotating body that is coaxial with the first rotating body and elastically held by an elastic body, and A regulating part that regulates the rotation range of the first and second rotating bodies when the first and second rotating bodies rotate in relatively different directions against the elastic force of the elastic body, and a pair of regulating parts provided on both sides of the mounting table. A guide piece is fitted into the fitting portion through a pair of guide grooves provided on both side plates, and the rotational force of the second rotating body is transmitted to the pair of guide pieces in synchronization with the second rotating body. In a magnetic recording and/or reproducing machine comprising a pair of rotating arms, the rotating arm moves the tape cassette placed on the mounting stand between the insertion and mounting positions by guiding the tape cassette. Even if it is stopped during movement to the insertion position, the projecting piece of the first rotating body contacts the abutment piece of the rotating arm, and as a result, the first rotating body does not overrun more than a predetermined amount, and then cassette loading operation is possible.

(f) Examples The details of the present invention will be explained in detail with reference to illustrated examples.

1 and 2 are side views of essential parts showing the cassette loading device of the present invention. To explain the figure number and structure, 71 is a protrusion provided on the gear 63 as a rotating body in FIG. 1. , 72 is the rotating arm 45
The projecting piece 71 is provided as a concentric circular arc.
The abutment piece 58 that comes into contact with is a second rotating body, and the same elements as in FIGS. 3 to 6 are given the same figure numbers.

The tape cassette 27 is held at the loading position by the cassette loading operation shown in FIGS. 4 to 6.
When the tape cassette 27 is ejected from the insertion port 70a in FIG. 4 by an operation opposite to the cassette loading, the tape cassette 27, which is moving in the direction C in FIG. 1, is pressed in the direction A in FIG. The rotating body 40 and the rotating arm rotate counterclockwise around the protruding piece 20 in the reverse operation described above at the position immediately before the contact switch 2 is turned on by being pressed by the protruding piece 42. Let us consider the case where 45 has stopped.

In this case, since the contact switch 2 is off, the motor 28 continues to be driven, and the rotating body 40
Since the rotating arm 45 stops, the rotating body 5
8 also stops. Then, the gear 63 resists the elastic force of the spring 67 until the protruding piece 71 and the abutting piece 72 come into contact with each other, that is, until the protruding part 64 is in a position where it does not come into contact with the p and q parts of the regulating protruding part 60. Projection piece 2
The motor 28 overruns clockwise around point 2, and this state is detected by the system control and the motor 28 is stopped. Here, due to the overrun, the protrusion 6
4 does not come into contact with the q portion of the regulating protrusion 60, the contact switch 2 is not pressed by the protruding piece 42 and remains in the OFF state. After that, when the pressure of the tape cassette 27 in the A direction is released, the regulating protrusion 6
Rotating body 58 until the p part of 0 comes into contact with protrusion 64.
rotates clockwise around the protrusion 22 due to the elastic force of the spring 67, and at the same time, the rotating body 40 and the rotating arm 45 rotate counterclockwise around the protrusion 20, and the contact switch 2 rotates around the protrusion 42. is pressed to turn on.

When the tape cassette 27 is pressed in the direction A from the above state, the rotating body 58 rotates counterclockwise around the protruding piece 22 against the elastic force of the spring 67, and the rotating body 40 and the rotating arm 45 also protrude. piece 20
In other words, the regulating protrusion 60 rotates clockwise around the
The protruding piece 42 separates from the contact switch 2 before the q portion of the contact switch 42 comes into contact with the protruding portion 64. This turns off the contact switch 2, and the motor 28 is driven by the control signal from the system control to execute the cassette loading operation.

Note that the length of the arc of the contact piece 72 is the same as that of the rotating arm 4.
The length is sufficient to allow the protruding piece 71 to come into contact with the protruding piece 71 according to the rotation range of the protrusion 5.

(g) Effects of the invention According to the invention, even if the rotating arm stops in the middle of moving the tape cassette to the insertion position, the first rotating body to which the driving force is transmitted can move more than a predetermined amount with a simple configuration. Since there is no overrun, it has the advantage that subsequent cassette loading operations are possible.

[Brief explanation of the drawing]

1 and 2 are side views of essential parts of the cassette loading device of the present invention, FIG. 3 is an exploded perspective view of a conventional cassette loading device, and FIG.
5 and 6 are side views of essential parts of a conventional cassette loading device. 11... Side plate, 12, 13... Guide groove, 24...
... Placement table, 25, 26 ... Guide piece, 27 ... Tape cassette, 45 ... Rotating arm, 52 ... Fitting hole, 58 ... Rotating body, 60 ... Regulation protrusion, 63
... Gear, 64 ... Protrusion, 67 ... Spring, 71 ... Projection piece, 72 ... Contact piece.

Claims (1)

[Scope of utility model registration request] A first rotating body to which driving force is transmitted; a second rotating body that is coaxial with the first rotating body and elastically held by an elastic body; a regulating part that regulates the rotation range of the first and second rotating bodies when the first and second rotating bodies rotate in different directions;
A pair of guide pieces provided on both sides of the mounting table are fitted into the fitting portions through a pair of guide grooves provided on both side plates, and the rotational force of the second rotating body is transmitted to rotate the second rotating body. A magnetic recording and/or reproducing device comprising a pair of rotary arms that allows a tape cassette placed on the mounting stand to be moved between insertion and mounting positions by guiding the pair of guide pieces in synchronization with a moving object. In the machine, the first rotating body is configured to stop the first rotating body which causes overrun by the driving force when the rotating arm stops in the middle of moving the tape cassette to the insertion position. A cassette loading device characterized in that a protruding piece is provided, and the rotating arm is provided with an abutting piece with which the protruding piece abuts.