JPS632155A - Disk cassette loading device - Google Patents

Abstract

PURPOSE:To always load a center core to a spindle by providing the 1st face of a pressing claw depressing one end of a pressing member in the direction of the center core and the 2nd face pressing and abutting one end of the pressing member in a parting direction from the center core. CONSTITUTION:In loading a disk cassette, as a holding metallic fixture 8 is moved in a direction approaching the disk cassette 3, the pressing member 19 presses the center core 2 by its own energizing force and the pressing force of the 1st face 14b of the pressing claw 14. When the fixture 8 is moved further, the center core is inserted completely into the spindle and not moved, then the pressing member 19 is pressed by the center core conversely and driven in a direction opposite to the direction of the energizing force and one end 19a of the pressing member 19 slides on the 1st face 14b of the pressing claw 14. When an engagement point between one end of the pressing member and the pressing claw passes through the 1st face 14b of the pressing claw, one end of the pressing member is moved in a parting direction from the center core by the 2nd face 14c of the pressing claw thereby parting the pressing member from the center core.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application In the present invention, a magnetic sheet supported by a center core is engaged with a spindle and rotated, and a magnetic head records and reproduces signals. For example, it relates to a disk cassette insertion device used in a video floppy drive device.

2. Description of the Related Art In a conventional disk cassette insertion device, as shown in FIG. 6, the rotation of the magnetic sheet 101 is controlled in order to ensure that the center of rotation of the magnetic sheet 101 built into the disk cassette 103 is accurately mounted on the center of rotation of the spindle of the main body of the device. A means is used which performs chucking by pressing the center core 102 provided at the center and rotates together with the center core 102. However, since the pressing force on the center core 102 is not released even after chucking, a large torque is required to rotate the magnetic sheet 101. As a means to eliminate these drawbacks, a permanent magnet is provided on the spindle of the device body, and when the disk cassette 103 is installed in the device, the center core 1
A method has been proposed in which a magnetic plate provided at o1 is attracted.

At this time, by providing a positioning elastic body 109a in a hole 102a that engages with the spindle shaft in the center core 1o2 at the center of rotation of the magnetic sheet 101, a slope portion 109b,
1o9C is pressed against the spindle by the pressing force of the elastic body 109&, and the center core 102 is positioned on the spindle.

Problems to be Solved by the Invention However, with such means, the attraction force of the permanent magnet in the spindle portion of the device main body overcomes the frictional force caused by the pressing force of the positioning elastic body 109a between the spindle and the center core. However, due to the dimensional accuracy and surface condition of the spindle itself, the dimensional accuracy of the center core 102 itself and the positioning elastic body 109a, and dimensional changes due to temperature, humidity, etc., the spindle and center core 1o2 This may cause a change in the frictional force between the permanent magnet and the permanent magnet, making it impossible to securely attach it using the attraction force of the permanent magnet. Therefore, if the attraction force of the permanent magnet is increased and the pressing force of the positioning elastic body 109a of the center core 102 is weakened, the attraction of the permanent magnet will conversely exceed the pressing force of the positioning elastic body 109a, and eccentricity may occur during installation. However, there was a problem in that the mounting was uncertain.

Means for Solving the Problems The present invention includes a holding fitting that is movable perpendicularly to the disk cassette, and a holding fitting that rotates around a first fulcrum provided on the holding fitting and is biased by an elastic body. A pressing member is provided with a pressing member that rotates about a second fulcrum provided on the holding fitting and is applied with a biasing force in a direction to press the center core by an elastic body, and the pressing claw is configured to press the center core with the biasing force. A disk cassette insertion device configured to have a first surface that presses one end of the member toward the center core, and a second surface that presses one end of the pressing member in a direction away from the center core following this surface. It is.

According to the above-described structure, when the holding metal fitting moves in the direction approaching the disk cassette when the disk cassette is installed, the pressing member uses its own biasing force and the first pressing claw.
The center core is pressed by the pressing force of the surface.

As the holding bracket moves further, the center core is completely inserted into the spindle and does not move, so the pressing member is pushed by the center core and rotates in the opposite direction to the biasing force, causing the pressing member to rotate in the opposite direction to the urging force. One end slides on the first surface of the pressing claw. When the engagement point between one end of the pressing member and the pressing pawl passes the first surface of the pressing pawl, the one end of the pressing member is moved away from the center core by the second surface of the pressing pawl, and the pressing member is moved away from the center core. Separate from the center core.

EXAMPLES The present invention will be explained below based on illustrated examples. 1st
The figure is a perspective view of a main part of a disk cassette insertion device according to an embodiment of the present invention. In the figure, 1 is a magnetic sheet, 2 is a center core of the magnetic sheet, and has a hole 2 & that engages with a spindle on the apparatus main body side. 3 is a disc cassette case. A release fitting 6 is attached to the base 4. The disk cassette insertion and sliding mechanism consists of a cassette holding fitting 6 and a cassette sliding fitting 7.
There is a holding fitting 8 at the top, and the cassette holding fitting 6 and the holding fitting 8 move up and down by sliding the cassette sliding fitting 7. The holding fitting 8 has a positioning body L9.
The positioning body R10 is fixed to the holding fitting 8 with screws 11a and 11b. Guide shafts 12A and 12B are provided on the base 4 in order to allow the holding fitting 8 to move up and down stably in the vertical direction. The holding fitting 8 has a support shaft 13 for the pressing claw.
is installed, and a pressing claw 14 and a pressing claw elastic body 16 are attached to the support shaft 13 thereof. The holding fitting 8 has a rotation stopper 16 for the pressing claw. The pressing claw 14 has a pressing claw rotation stopper 17. Further, a support shaft 18 for a pressing member is installed on the holding fitting 8, and an elastic body 2° for a pressing member is attached to the pressing member 19. The biasing force of the elastic body 15 for a pressing claw is stronger than that of the elastic body 2o for a pressing member. It is set.

Further, the direction of the urging force is such that the pressing claw 14 presses the pressing member 19. The pressing member is disk cassette 3
It is set to the side, that is, downward. Furthermore, the pressing member is provided with a stopper 21 to prevent rotation, and is set so as to come into contact with the upper surface of the holding fitting 8. The slide fitting 7 is equipped with an eject knob 22, the base 4 is equipped with lower limit stoppers 23A and 23B of the holding fitting 8, and the holding fitting 8 is provided with an elastic body 2 for imparting downward biasing force.
4A.

It has a configuration with 24B and 24C.

First, the operation will be explained in detail below.

FIG. 2 shows a projection 14a of a pressing claw on the lower surface 6a of the release fitting.
The elastic body 16 for the pressing claw is attached so as to apply a biasing force (arrow view C) to the holding fitting 8 around the support shaft 13. The pressing claw 14 has a first surface 14b and a second smooth surface 14c that press the smooth surface 19a of the pressing member 19.
It is equipped with The holding fitting 8 also has a support shaft 18 for the pressing member.
The pressing member elastic body 20 is attached so that a biasing force (arrow view D) is applied around the center. On the lower surface of the pressing member 19, a magnetic sheet center core (FIG. 1, 2) is pressed.
A low protrusion 19a is provided on the opposite side of the high first protrusion 19b. The spindle motor disk 26 is attached to the base (Fig. 1, 4), has a magnetic sheet center core receiving surface 26, and has an adsorption magnet 2 inside the disk 26.
6 is built-in.

A spindle shaft 27 is press-fitted into the center of the disk 26. This is the initial state before the disk cassette is installed.

Figure 3 shows how the disk cassette 3 is attached to the cassette holding bracket (
When inserted into the cassette slide fitting (Fig. 1 6),
When the disc cassette 3 in the cassette holding bracket (Fig. 1, 6) starts to fall vertically, the holding fitting 8 also falls vertically from the second position and presses The protrusion 14a of the claw is separated from the lower surface 6a of the release fitting, and the pressing claw 14 moves around the support shaft 13 to move the disk cassette 3
When rotated to the side (in the direction of arrow C), the holding fitting 8 further descends while the first surface 14b of the pressing claw presses the smooth surface 19b of the pressing member with the biasing force of the elastic body 16. When the hole 2a in the center core of the magnetic sheet engages with the spindle shaft 27, the tall first protrusion 19b on the bottom surface of the pressing member 19
The center core 2 of the magnetic sheet is pressed against the surface 25a of the magnetic sheet center core receiver of the disk, and the center core 2 of the magnetic sheet is inserted. Furthermore, the retaining metal fitting 8
When the pressing member 19 descends, the pressing member 19 is reversed to the center core 2, and as shown in FIG.
2 rotates around the support shaft 13 in the direction , so that the low second protrusion 19c on the bottom surface of the pressing member 19 presses the magnetic sheet center core 2 and reliably presses the cassette receiving surface 25a of the disk of the spindle motor. Insert the magnetic sheet center core 2 into. The holding fitting 8 further descends, and when the engagement point between the pressing member 19 and the pressing claw 14 passes the switching point 14d between the first surface 14b and the second surface 14c, the sixth
Further, as shown in the figure, the pressing claw 14 is
, the second smooth surface 14c of the pressing claw 14 slides onto the smooth surface 19a of the pressing member 19, and lifts the pressing member 19 upwards (in the direction of arrow F) about the support shaft 18.

When the rotation stopper 17 of the pressing claw 14 is rotated by the pressing claw rotation stopper (FIG. 1 16) of the holding metal fitting 8 and the rotation is stopped, the pressing member 19 is completely separated from the center core 2 and the magnetic sheet center core 2 The disk 26 of the spindle motor can be reliably mounted without any load remaining on the disk 26 of the spindle motor.

In this state, the holding fitting 8 is at the lower limit stopper 23A provided on the base.

23BiC1, it stops and is held.

Next, in order to eject the disk cassette 3, when K pushes the eject knob in the direction of the arrow H (as shown in Fig. 1), the slide fitting 7 moves in the direction of the arrow H, and the holding fitting 8 is vertically moved. The cassette holding fitting 6 also moves vertically upward while keeping the disk cassette 3 inside, and as shown in FIG.
, the pressing claw 14 rotates in the direction of the arrow around the support shaft 13, and when the pressing claw 14 and the pressing member 19 are disengaged, the pressing member 19 rotates downward (in the direction of the arrow). The stopper (FIG. 1, 21) of the pressing member comes into contact with the upper surface of the holding fitting 8 and returns to the initial state, and the holding fitting 8
When the lifting of the disk cassette 3 stops, the disk cassette 3 is taken out as shown in FIG. 1, and the removal of the disk cassette 3 is completed.

As described above, according to the present invention, the center core can always be reliably attached to the spindle without being affected by changes in the mutual relationship between the attraction force of the permanent magnet of the spindle and the pressing force of the positioning elastic body of the center core. Installation is possible due to its simple configuration. Further, in the first position, the pressing member does not interfere with the insertion and ejection of the disk cassette, and in the second position, the pressing member releases the pressure on the magnetic center core after chucking the center core to the spindle motor. Therefore, no unnecessary torque is generated in the rotation of the magnetic sheet, and the effect is extremely large.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of a disk cassette insertion device according to an embodiment of the present invention, FIG. 2, FIG. 3, and FIG. 4. FIG. 6 is a front view for explaining the operation of attaching and detaching the magnetic center core, and FIG. 6 is a top view of the disk cassette. 3...Disc cassette, 4...Base, 6...Release fitting, 6...Cassette holding fitting, End...Sliding fitting , 8...
Holding metal fitting, 9... Positioning body (L), 10...
...Positioning body (R), 1; aA, 12B...
...Guide shaft, 13...Press claw support shaft, 14.
... Pressing claw, 16... Elastic body for pressing claw,
18... Support shaft for pressing member, 19... Pressing member, 23A, 23B... Lower limit stopper. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
Disk force 4-base 5-release fitting 6-force? ? -7H leather t+metal fittings 7・-cut slide l! L tool g - m - Holding metal fitting 14 - - 1〒 IE B\l Day #y Melon member Fig. 1 5 (1 - Ril FA Tsutomu bottom surface both - Pressing claw 9I rise 14J - Pressing claw O Life 14G---Keatsuga\Sai2's side Iqa・-1 Maatsube Sai's circle, TU side lπ-↑〒 Pressure Torin's &Ior's protrusion 1'1c-1 Ma5 4p material The second protrusion z5-
Disk 25σ of Suji Sidor Satoshi-Magnetic sheet core holder is released 26- Utaseimabu/f-ft 27- SC Sidle motor shaft Fig. 2/--Ikkih sheet 2...-Intercore with Renki sheet 5a - Lower surface of the release fitting Ua - Retention ta to 1 scale - 1 side of the pressing claw I - 1 8 cm 2 surface Fig. 4 Fig. 5

Claims (3)

[Claims] (1) Recording or reproduction is performed by rotating the magnetic sheet by engaging the center core of a disk cassette containing a rotatable magnetic sheet supported by a center core with a spindle on the main body side of the recording/reproducing device. A disk cassette insertion device that transports the disk cassette between a first position and a second position that allows the disk cassette to be attached to and removed from the main body of the recording/reproducing apparatus, the device being perpendicular to the disk cassette. a holding fitting movable in the direction; a presser pawl provided with a first fulcrum on the holding fitting, rotating around the first fulcrum and being biased by an elastic body;
The holding fitting is provided with a second fulcrum, and includes a pressing member that rotates around the fulcrum and is applied with a biasing force in a direction to press the center core by an elastic body, and the pressing claw is caused to press the center core by the biasing force. It has a first surface that presses and contacts one end of the pressing member in the direction of the center core, and a second surface that presses and contacts one end of the pressing member in a direction away from the center core following the first surface. A disk cassette insertion device characterized by: (2) The disk cassette insertion device according to claim 1, characterized in that the urging force of the elastic body of the pressing claw is stronger than the urging force of the elastic body of the pressing member. (3) A release fitting fixed to the main body of the apparatus is provided, and when the holding fitting moves in a direction away from the disk cassette, one end of the pressing claw comes into contact with the releasing fitting, and the pressing claw moves in the urging direction. 2. The disk cassette insertion device according to claim 1, wherein the pressing pawl and the pressing member are disengaged by rotating in the opposite direction.