JPH0318265B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to, for example, an electronic still camera system in which a magnetic sheet supported by a center core is engaged with a spindle and rotated, and a magnetic head records and reproduces signals. This invention relates to the disk cassette insertion device used.

Conventional structure and its problems In conventional disk cassette insertion devices, the center core is pressed to attach the magnetic sheet to the spindle of the device body, and even after centering the center core, the pressure on the center core is not released. Therefore, a large torque is required to rotate the magnetic sheet. In addition, in order to eliminate the pressure on the center core mentioned above, there are some that use a magnet to attract the center core and provide a spring for center ring on the center core, but in this case, the attraction force of the magnet and the center ring High precision is required to manage the relative relationship with the strength of the elastic force of the spring, resulting in high costs.

Purpose of the Invention The present invention eliminates the drawbacks of the conventional disk cassette insertion device, and enables reliable insertion of the center core into the spindle with a simple configuration, and after the centering operation is completed, the center core is inserted into the center core. The purpose is to enable rotation of the magnetic sheet at low cost and with small torque with an extremely compact configuration by releasing the pressure.

Structure of the Invention The present invention provides an apparatus in which a disk cassette rotatably stores a magnetic sheet supported by a center core, and the center core and a spindle on the apparatus main body are engaged with each other in the apparatus main body to rotate the magnetic sheet. In addition to enabling recording or reproduction using the magnetic head on the main body side, the first position allows the casing of the disk cassette to be positioned by the positioning member on the main body side, and the disk cassette can be attached and removed outside the main body of the apparatus. A disk cassette inserting device for transporting a disk cassette to a second position, which can be held in two positions by means of a cassette mounting plate that stores the disk cassette and roughly positions it, and an elastic click means. In the second position, the cassette mounting plate is open from other members to the extent that there is no problem in inserting and ejecting the disk cassette, and when it is in the first position, After the cassette mounting plate has moved, the pushing member comes into contact with the center core as the top cover moves, and uses its elastic force to firmly push the center core into the spindle. It is a disk cassette insertion device that is configured to detach from the core, and has a release member on the device main body side to return to the state at the second position when returning from the first position to the second position. The magnetic sheet can be rotated with low cost and low torque.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the configuration of a disk cassette insertion device according to an embodiment of the present invention, and FIG. 2 is a front view of the disk cassette insertion device. 1 and 2, 1 is a board, 2 is a stop plate fixed to the board 1, 3 is a U-shaped frame, and one end has a groove for holding a spring 5a between it and the board 1. The supporting shafts 4a, 4 are provided on support plates 6a, 6b fixed to the substrate 1, and have holes 7a, 7b on both sides.
It is held by b. It also has a protrusion 8 and a spring pin 9 on the other side, and holes 10 on both sides.
a, 10b. Reference numeral 12 denotes an upper lid, which has claws 12a and 12b on both sides, and has a square hole at a position where it can engage with the hook 21 held by a support shaft 26 provided on a hook support fitting 25 fixed to the base plate 1. 13, and a spring hook pin 14,
A spring 5b is held between the frame 3 and the pin 9. Furthermore, it has holes 17a and 17b on both sides. A drive lever 16 is engaged with the frame 3 and the top lid 12 through a pin 11 provided on the frame 3 and an elongated hole 16b, and a pin 15 provided on the top cover 12 through a long hole 16c, respectively. Further, the hole 16a is connected to a support shaft 2 provided on a support fitting 22 fixed to the substrate 1.
3 and holds the drive lever 16 rotatably. Although the opposite side has the same configuration, it is indicated by the same number and the explanation will be omitted. Reference numeral 18 denotes a mounting plate on which a disk cassette (not shown) is mounted, and has elongated holes 19a and 19b. Also, hole 18a,
18b has springs 27a, 2 between them and the substrate 1, respectively.
Holds 7b.

20 is a support shaft, which is connected to the holes 10a and 10 of the frame 3.
b. Holes 17a, 17b of upper lid 12 and mounting plate 18
It passes through the elongated holes 19a and 19b. A spindle 28 is positioned by being engaged with a spindle shaft 30 fitted into a spindle bearing 29 fixed to the substrate 1. Note that the spindle 28 is connected to the motor by a belt under the substrate 1, but the explanation will be omitted here.

Next, the detailed structure of the cassette pushing member will be explained with reference to the perspective view of the parts shown in FIG. 1 and 3, the cassette holding plate 31 is provided with a support member 32 and a click support member 33, the support member 32 has a through hole 32a, and the click support member 33 has a bottomed hole 33a. A spring 37 and a steel ball 38 are inserted into the bottomed hole 33a. The cassette holding plate 31 is rotatably held by a support shaft 34 embedded in a cassette pusher support fitting 35. At this time, the aforementioned steel ball 38 is pressed by the spring 37 into the hole 35a or 35b provided in the presser plate 35.
1 has a click function when rotating. 3
Reference numeral 6 denotes a cassette push-in support metal fitting which has a hole 36a and fits into the support shaft 34 to rotatably hold the presser plate 31. The support fittings 35 and 36 are fixed to the upper lid 12. Furthermore, a cassette presser spring 39 is fixed to one end of the presser plate 31. 24 is a click return plate fixed to the substrate 1.

Next, the operation will be explained using two views: FIG. 4, which is a front partial sectional view when opened, and FIG. 5, which is a front partial sectional view when the cassette is installed. FIG. 4 shows that the frame 3 is rotated about the support shafts 4a and 4b by the elastic force received from the spring 5a (not shown) in the direction of arrow A until the protrusion 8 of the frame 3 comes into contact with the stop plate 2. The upper lid 12 is positioned as shown in the figure by the movement of the support shaft 20 and the drive lever 16 engaged with the frame 3. The looseness at that time is removed by the elastic force of the spring 5b held by the pin 9 of the frame 3 and the pin 14 of the upper cover 12. Further, the position of the mounting plate 18 is pulled in the direction of arrow B by the elastic force of springs 27a and 27b held by the holes 18a and 18b and the board 1, and the supporting shafts are attached to the ends of the elongated holes 19a and 19b. The lower side is supported and held by the claws 12a and 12b of the upper cover 12 so that the upper cover 12 and the disc cassette 20 are in contact with each other and there is a gap that does not hinder the insertion and ejection of the disk cassette. At this time, the above-mentioned state of the cassette pushing member is such that the steel balls 38 are engaged with the holes 35a of the cassette pushing support fitting 35, and the presser spring 39 is separated from the center core 102 that supports the magnetic sheet 101 in the cassette 100.

The mounting operation of the cassette 100 from FIG. 4 to FIG. 5 is performed by applying a pressing force to the upper lid 12 in the direction of arrow C, thereby rotating the upper lid 12 around the support shaft 20 and lowering the drive lever 16 and the support shaft 20. To go. Therefore, the frame 3 moves down in conjunction with the upper lid 12 using the support shafts 4a and 4b as fulcrums. At this time, the mounting plate 18 is lowered as the support shaft 20 and the upper cover 12 move, and its height is determined by the height determining pin 103 and held by the springs 27a and 27b described above. Placement plate 1
The cassette 100 housed in the cassette 8 is also lowered in the same way, positioned by a positioning pin 104, etc., and held by a cassette presser spring 105 attached to the upper lid 12. During this operation, that is, before the upper cover has completely lowered from FIG. 4 to FIG. The center core 1 is moved by the elastic force of the spring 37.
02 into the spindle 28. When the center core 102 reaches the receiving portion 28a of the spindle 28, the cassette holding plate 31 moves toward the upper lid 12 against the force of the spring 37, and the steel balls 38 eventually slip out of the hole 35a and move toward the hole 35b. The cassette holding plate 31 is urged toward the upper lid 12 when the cassette is about to move to the upper lid 12 side. In this way, the presser plate 31 is released from the pressure on the center core 102, and the presser spring 39 and the center core 102 are separated from each other. Then the upper lid 12
comes to the position shown in Figure 5. At this time, although the entire device is receiving force in the direction of arrow A by the spring 5a,
The stop position shown in FIG. 5 is held by a hook 21 that is engaged with a square hole 13 in the top cover 12. Hook 2
1 is urged toward the upper lid 12 by a spring 105. When this hook 21 is removed from the square hole 13 against the force of the spring 105, the upper cover 12, the frame 3, and the mounting plate 18 are moved by the elastic force received by the spring 5a.
performs the reverse operation described above and moves to the state shown in FIG. At this time, as the click support member 33 comes into contact with the click return plate 24, the cassette holding plate 31 is moved downward against the biasing force of the spring 37, and the steel balls 38 that have come out of the holes 35a are removed. It moves again to the hole 35a side and returns to the state shown in FIG. 4.
Although not shown, the center core 102 is provided with a spring for centering. In this embodiment, a spring 37 and a steel ball 38 are used as the click means.
Although a configuration using a plate spring has been shown, similar actions and effects can be obtained with other configurations such as using a leaf spring. Further, the configuration of the upper lid 12 is not limited to the shape of this embodiment.

Effects of the Invention According to the disk cassette insertion device of the present invention as explained above, the center core can be reliably inserted into the spindle and the centering operation can be performed simply by pressing the upper cover 12, and the elastic click mechanism allows By having this, it is possible to release the pressure on the center core by the cassette pushing member after the above operation is completed with an extremely compact structure, which is extremely effective in reducing the torque for rotating the magnetic sheet at low cost.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a disk cassette insertion device according to an embodiment of the present invention, Fig. 2 is a front view of the device, Fig. 3 is a perspective view of the main parts of the device, and Fig. 4 is a state in which the device is opened. FIG. 5 is a front partial sectional view of the same device when a cassette is attached. 3...Frame, 12...Top lid, 18...Place plate, 24...Click return plate, 28...Spindle, 31...Cassette holding plate, 33...Click support member, 35...Support metal fittings, 37 ……Spring,
38...Steel ball, 100...Cassette, 101...
Magnetic sheet, 102... Center core, 103...
...Height fixing pin, 104...Positioning pin, 10
5...Cassette presser spring.

Claims (1)

[Claims] 1. A spindle provided on the main body board, a middle frame to which a disk cassette for storing the magnetic sheet supported by the center core is attached, and a pushing member for pushing the center core so that the center core is engaged with the spindle. an outer frame provided between the pushing member and the middle frame, and a click means provided between the middle frame of the outer frame and capable of holding the pushing member in two positions; and a release means for releasing the holding of the pushing member at one position by the click means, the pushing member being brought into contact with the center core as the outer frame is moved in the direction of the middle frame. to engage the center core with the spindle, and before the movement of the outer frame is completed, the pushing member is held at the one position by the click means and separated from the center core, and the outer frame is moved away from the center core. A disk cassette insertion device characterized in that as the disk cassette inserter is moved in a direction away from the inner frame, the holding of the pushing member at the one position is released by the releasing means.