JPH0515178U - Hikari Disk Cartridge - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the built-in optical disc to be fixed without using separate parts. [Structure] The outer peripheral portion 4 of the optical disk 4 is urged by a spring 3 when the cartridge opening is closed.
The slider 11 is provided with a protrusion 11 for pressing a, and when the optical disk 4 is not inserted into the drive device, the protrusion 1
The optical disc 4 is fixed at 1. [Effect] It is possible to securely fix the optical disk when the opening is closed without increasing the number of parts without using separate parts, prevent scratches and wear, and eliminate obstacles during reading and writing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of an optical disc cartridge.

[0002]

[Prior Art]

 The optical disk cartridge is configured such that an optical disk is housed between the upper shell and the lower shell, the two shells are fixed to each other, and an opening provided for reading and writing operations is opened and closed by a shutter. The shutter is fixed to a slider slidably provided on the edge of the shell, and the slider is biased in the closing direction by a return spring. In such a conventional optical disc cartridge, fixing the built-in optical disc when the opening is closed is not generally performed. Therefore, when vibration or drop impact is applied during transportation, the optical disk tilts and comes into contact with the inner surface of the shell, which inevitably scratches or wears. It sometimes caused a write failure.

FIG. 4 shows a conventional example in which disk fixing means is provided to avoid this. Reference numeral 1 is a shell, 2 is a slider, 3 is a coil spring for returning that urges the slider 2 in a closing direction, 4 is an optical disk, and is pivotally supported by a pin 6 so as to be located on the outer peripheral portion of the optical disk 4. The oscillating body 5 is provided, and the tip of the spring needle 5a attached to the oscillating body 5 is engaged with the coil spring 3. The solid line in the figure shows the state in which the slider 2 is in the closed position, and the lower end of the oscillating body 5 abuts the outer peripheral portion of the optical disc 4 to fix the optical disc 4, but the slider 2 is in the open position of the chain line ( When the coil spring 3 is moved to the left (in the figure), the tip of the spring needle 5a is also moved to the left along with this, and the oscillating body 5 is rotated in the counterclockwise direction as shown by the chain line and separated from the optical disc 4. The fixation of the disk 4 is released. However, such a disc fixing means requires the oscillating body 5, which is a separate component, and has a problem in that the structure is so complicated that the assembling property is poor, the cost is increased, and the weight is increased. ..

[0004]

[Problems to be solved by the device]

 The present invention has been made in view of such a problem, and has an object to fix the built-in optical disc without using a separate component.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, the slider is provided with a protrusion that presses the outer peripheral portion of the optical disk by the biasing force of the return spring when at least the opening is closed.

[0006]

[Action]

 Since the protrusion of the slider contacts the outer peripheral portion of the optical disc and presses the optical disc with the opening closed, the optical disc is automatically fixed in the shell.

[0007]

【Example】

 Next, one embodiment shown in the figure will be described. 1 to 3, 1 is a shell, 2 is a slider, 3 is a return spring, and 4 is an optical disk, which is the same as FIG. 4, but a torsion spring similar to an optical disk cartridge known as a spring 3 is used. The slider 2 is provided with a protrusion 11. 1 and 2 show the slider 2 in the closed position and the open position, respectively. The shutter fixed to the slider 2 is not shown.

The protrusion 11 is formed so as to abut against the outer peripheral portion 4 a of the optical disk 4 when the slider 2 is in the closed position, and is protruded inward from one end of the slider 2. A notch 1b is provided in a portion of the outer peripheral frame 1a formed on the inner surface of the outer peripheral frame 1a corresponding to the protrusion 11. The spring 3 urges the slider 2 to the left in the figure, the protrusion 11 presses the optical disc 4 by this urging force, and the optical disc 4 is sandwiched between the protrusion 11 and the outer frame 1a. The state is automatically fixed in the shell 4. Therefore, even when an external force such as a vibration or a drop impact is applied when the optical disc 4 is not inserted in the drive device, that is, when the slider 2 is in the closed position, the optical disc 4 comes into contact with the inner surface of the shell 1 and is damaged. It does not stick or wear, and it prevents the generation of scratches and wear debris that can cause reading or writing problems.

Further, when the optical disk 4 is inserted into the drive device, the slider 2 is moved to the right in the figure by the shutter drive mechanism provided in the device to open the shutter. The part 11 separates from the optical disc 4, and the fixation of the optical disc 4 is automatically released.

Since there is not much space inside the shell 1, the shape of the protrusion 11 is restricted to some extent. FIG. 3 shows a specific example of the shape of the protrusion 11. (a) shows an example of a shape in which the contact surface 11a to the optical disk 4 has an arc shape corresponding to the outer circumference of the optical disk 4 and a shallow groove 11b having a width W of 2 mm and a depth D of about 1 mm is provided. There is. The groove 11b not only pushes the optical disc 4 in the diametrical direction, but also fixes the optical disc 4 with the outer periphery held from both sides. Further, (b) shows that the entire contact surface 11a is made flat so that the wide contact surface 11a can surely press the outer circumference of the optical disk 4 even when the optical disc 4 is inclined in the shell. Is done.

Since the slider 2 is rubbed against the shell 1 when the shutter is opened and closed, it has wear resistance, and polyacetal is generally used to prevent thermal deformation such as warpage. When 11 is integrally formed, the material of the protrusion 11 is also the same polyacetal. However, since it is desirable that the protrusion 11 has a low coefficient of friction, the protrusion 11 may be separately molded using a material such as polyurethane, polybutylene terephthalate, or polyvinyl chloride, and the two may be bonded and integrated.

[0012]

EFFECTS OF THE INVENTION As is apparent from the above-described embodiments, the present invention provides the slider with a protrusion that presses the outer peripheral portion of the optical disc by the biasing force of the spring when the opening is closed. The optical disk is fixed by this protrusion when the disk is not inserted in the drive device. Therefore, only a protrusion is provided on the slider, and no separate parts are needed.The optical disk is securely fixed with the same number of parts as a general optical disk cartridge that does not have a fixing means for the optical disk, and the optical disk is the inner surface of the shell. It is possible to prevent the generation of scratches and abrasion powder due to contact with and to eliminate the obstacle during reading and writing. It also has the advantages of simple structure, good assembling, and little increase in weight and cost.

[Brief description of drawings]

FIG. 1 is a plan view of an inner surface of a shell in a state where a slider according to an embodiment of the present invention is in a closed position.

FIG. 2 is a plan view of the inner surface of the shell in the state where the slider of the embodiment is in the open position.

3A and 3B are a front view and a side view showing an example of the shape of a protrusion in the embodiment.

FIG. 4 is a plan view of the inner surface of the shell in a state where the slider of the conventional example is in the closed position.

[Explanation of symbols]

 1 Shell 2 Slider 3 Return Spring 4 Optical Disc 4a Outer Perimeter 11 Projection 11a Abutment Surface

Claims (1)

[Scope of utility model registration request] 1. An optical disk is rotatably accommodated in a flat shell, and a slider is slidably attached to a peripheral portion of the shell and biased by a spring toward a closed position. The slider is fixed to the slider. In the optical disk cartridge in which the opening of the shell is opened and closed by the shutter, the slider is provided with a protrusion that presses the outer peripheral portion of the optical disk with the biasing force of the spring at least when the opening is closed. An optical disc cartridge characterized by: