JP4236866B2 - Disc cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cartridge containing a disk such as an optical disk as a recording medium.
[0002]
[Prior art]
FIG. 17A to FIG. 18C, FIG. 18A, FIG. 18B, and FIG. 18B show a cartridge in which an opening for exposing an optical disc is provided on only one of the upper and lower shells. This will be described below with reference to FIG. 19 and FIGS.
[0003]
FIG. 17A is a plan view of the disk cartridge, FIG. 17B is a bottom view, and FIG. 17C is a side view, both showing a state where the shutter is closed.
[0004]
A disk cartridge (hereinafter, referred to as a cartridge) 102 includes an upper shell 103, a lower shell 104, a shutter 107, a lock lever 108, and the like, and an optical disk 101 on which an information signal is recorded can be rotated. It is stored in.
[0005]
As shown in FIG. 17 (c), the lower shell 104 has a first opening 105 (dotted line) facing a pickup unit 127 (see FIG. 20 (b)) for recording or reproducing information signals, and an optical disc. And a second opening 106 facing a spindle motor (not shown) for rotating and holding 101.
[0006]
As shown in FIGS. 20A and 20B, the cartridge 102 is mounted on an optical disk recording / reproducing apparatus 120, and information is recorded / reproduced. FIG. 20A is a plan view showing a state in which the cartridge 102 is inserted into the cartridge holder 122 of the optical disc recording / reproducing apparatus 120, and FIG. 20B shows a side view thereof.
[0007]
When the insertion of the cartridge 102 into the cartridge holder 122 of the optical disc recording / reproducing apparatus 120 is completed, the cartridge 102 is provided at the tip of an open lever 124 provided with a spring property for opening and closing the shutter 107. The protrusion 124a enters the hole 107f provided in the shutter vertical portion 107b to hold the shutter 107 at the position, so that the opening 105 is opened and the pickup unit 127 can access the optical disc 101.
[0008]
Here, the configuration of the shutter 107 will be described below with reference to FIGS.
[0009]
The shutter 107 is formed in a substantially U-shaped cross section by a shutter portion 107a that shields the first opening 105 provided in the upper and lower shells 103 and 104 and a shutter vertical portion 107b that is connected to the shutter portion 107a. Yes.
[0010]
Further, the shutter 107 is connected to the shutter vertical portion 107b, and is locked by a guide portion 107c parallel to the shutter portion 107a, a guide portion at the time of opening and closing, and a claw portion 107e portion that serves as a retaining member, and a lock lever 108 described later. The shutter lock unit 107d is provided.
[0011]
The guide part 107c and the claw part 107e are assembled so as to slide in a guide groove 104d provided in the lower shell 104, and prevent the shutter 107 from coming off from the cartridge 102 and serve as a guide when sliding. .
[0012]
The shutter 107 in the thickness direction of the cartridge 102 is held by the cartridge 102 being sandwiched between the shutter portion 107 a and the guide portion 107 c of the shutter 107.
[0013]
On the side surface of the upper shell 103 and the lower shell 104 on which the shutter vertical portion 107b slides, the lock lever 108 is removed, the guide portion 107c, the shutter lock portion 107d, and a shutter lock release member 123 (see FIG. 18 (a) ( A space 110 is provided for passing b).
[0014]
In the cartridge 102 configured as described above, the shutter lock portion 107d is locked by the lock lever 108 when the shutter 107 is closed. It is mounted on the device 120 (see FIGS. 20A and 20B) to record and reproduce information.
[0015]
Next, the operation when the cartridge 102 is inserted into the cartridge holder 122 will be described with reference to FIGS. 18 (a) and 18 (b) and FIGS. 20 (a) and 20 (b).
[0016]
When the cartridge 102 is inserted while the cartridge holder 122 is raised from the main chassis 121 of the optical disc recording / reproducing apparatus 120, first, an open lever 124 having a spring property for opening and closing the shutter 107 provided in the cartridge holder 122 is used. The protrusion 124a provided at the tip of the shutter rides on the shutter vertical portion 107b of the shutter 107 and moves along the shutter vertical portion 107b.
[0017]
The shutter lock release member 123 provided on the cartridge holder 122 releases the lock lever 108 of the cartridge 102, and then the shutter lock release member 123 contacts the shutter 107, and at the same time, the protrusion of the open lever 124. 124 a enters the hole 107 f provided in the shutter vertical portion 107 b of the shutter 107 by the spring force, and holds the shutter 107 at a predetermined position of the cartridge holder 122.
[0018]
Thereafter, when the cartridge 102 is pushed in, the main body of the cartridge 102 is inserted to the back. However, since the shutter 107 is held at that position, the shutter 107 is relatively opened.
[0019]
In the case of closing, since the protrusion 124 a enters the hole 107 f of the shutter 107, the shutter 107 is held in that position even if the cartridge 102 is pulled out in the direction opposite to the insertion direction, and the shutter 107 is closed. When the shutter lock release member 123 is moved away from the shutter 107, the shutter 107 is locked by the lock lever 108. When the cartridge 102 is further pulled out in this state, the protruding portion 124 a comes up from the hole 107 f of the shutter 107, and then the entire cartridge 102 is pulled out from the cartridge holder 122.
[0020]
However, the cartridge 102 configured as described above has the following problems. As shown in FIGS. 17A to 17C and FIG. 19, since the guide groove 104d for guiding the shutter 107 is provided on one side, for example, the bottom surface of the cartridge 102, the area of the first opening 105 is shown. Needs to be accommodated within the bottom surface of the cartridge 102 which had to be formed avoiding the guide groove 104d. In other words, the guide groove 104d for guiding and holding the claw portion 107e guide portion 107c of the shutter between the end face of the cartridge 102 and the first opening portion 105 is always necessary, so The range of the opening 105 could not be provided beyond the guide groove 104d.
[0021]
Therefore, since the movable portion 129a of the actuator 129 including the objective lens 128 of the pickup unit 127 shown in FIGS. 20A and 20B needs to avoid interference with the cartridge 102 even when moved to the outer periphery, the optical disk 101 could not be approached. In other words, the design is limited by the actuator 129, and it is necessary to configure the objective lens 128, the objective lens holder, the holding spring, and the magnetic circuit so as not to interfere with the cartridge 102. was there.
[0022]
Furthermore, since the guide groove 104d can be seen from the outside, there are problems in the shutter opening / closing operation due to the adhesion of dust and the design.
[0023]
Therefore, in order to solve the above various problems, a disk cartridge as shown in FIGS. 21A and 21B has been proposed. FIG. 21 is a perspective view of a disk cartridge disclosed in Japanese Patent Laid-Open No. 5-89630. FIG. 21 (a) is a perspective view of the disk cartridge as viewed from the upper half side, and FIG. FIG. 5 is a perspective view of the disk cartridge as viewed from the lower half side.
[0024]
In the disk cartridge disclosed in the above publication, as shown in FIGS. 21A and 21B, a guide groove for guiding the shutter 107 is formed in the half (shell) 104 provided with the first opening 105. Therefore, there is no problem due to the provision of the guide groove in the vicinity of the first opening 105 as described above.
[0025]
[Problems to be solved by the invention]
Incidentally, in the disk cartridge disclosed in the above publication, as shown in FIG. 22, the space 107 formed in the joint portion between the upper half 103 and the lower half 104 of the cartridge 102 is used as a guide groove of the shutter 107. . The shutter 107 is slidably supported by the shutter portion 107a and the guide portion 107c so as to sandwich the end portion of the lower half 104. The shutter 107 is prevented from dropping from the cartridge 102 by the clamping force between the shutter portion 107a and the guide portion 107c.
[0026]
However, in the disc cartridge disclosed in the above publication, as described above, since the shutter 107 only holds the end portion of the lower half 104 between the shutter portion 107a and the guide portion 107c, the cartridge 102 is subjected to external force. There is a risk of falling off.
[0027]
Therefore, in order to prevent the shutter 107 from falling off the cartridge 102, it is conceivable to increase the clamping force between the shutter portion 107a and the guide portion 107c.
[0028]
However, if the clamping force between the shutter portion 107a and the guide portion 107c is increased, there arises a problem that the shutter 107 cannot be smoothly slid.
[0029]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a disc cartridge that can smoothly slide the shutter and reliably prevent the shutter from falling off.
[0030]
[Means for Solving the Problems]
In order to solve the above problems, the disk cartridge of the present invention stores a disk as a recording medium in an internal space where two shells are overlapped, and a part of the disk is placed in one of the shells. In the disk cartridge provided with an opening for exposing and slidably provided with a shutter for opening and closing the opening, the shutter is connected to the shutter that covers the opening and the shutter. The guide portion is configured to guide the shutter in the sliding direction, and the guide portion is movable in the sliding direction of the shutter while being sandwiched between the opposing portions of the two shells when the two shells are overlapped. It is characterized by being supported by.
[0031]
According to the above configuration, since the guide portion constituting the shutter is sandwiched between the opposing portions of the two shells when the two shells are overlapped, the shutter is guided and prevented from falling off. Even if the guide groove provided in the shell is not used for the purpose, it is possible to prevent the shutter from falling off the shell.
[0032]
Thus, since the guide groove for preventing the shutter from falling off is not necessary, the structure of the shutter and the disk cartridge can be simplified, and the thickness of the disk cartridge can be reduced by the depth of the guide groove. Play.
[0033]
In addition, since the guide portion of the shutter is supported while being sandwiched between the two shells, the shutter portion connected to the guide portion may not be directly involved in supporting the shutter. That is, it is not necessary to sandwich one shell between the shutter portion and the guide portion of the shutter as in the prior art. For this reason, since a frictional force is not generated as in the case where the shell is sandwiched between the shutter portion and the guide portion of the shutter, the shutter can be smoothly slid.
[0034]
In order to solve the above problems, the disk cartridge of the present invention accommodates a disk as a recording medium in an internal space where the upper shell and the lower shell are overlapped, and exposes a part of the disk to the lower shell. And a shutter for covering the opening and a vertical portion connected to the shutter. The disc cartridge is provided with an opening for opening and opening and closing a shutter for opening and closing the opening. A guide portion connected to the vertical portion is formed in a substantially U-shaped cross section, and the guide portion of the shutter includes a first guide surface formed in a direction parallel to the bottom surface of the shell inside the upper shell, The lower shell is sandwiched between a first guide surface formed in a direction parallel to the bottom surface of the shell, and the vertical portion of the shutter is A second guide surface formed extending in a direction parallel to the sliding direction of the shutter and a second guide surface formed in the upper shell in a direction parallel to the side surface of the upper shell. It is characterized by being sandwiched.
[0035]
According to the above configuration, since the guide portion and the vertical portion of the shutter slide in the space formed by the first and second guide surfaces of the upper shell and the first and second guide surfaces of the lower shell, Thus, there is no need to provide the claw portion of the shutter and the guide groove of the lower shell which are provided so that the shutter does not fall off, and the structure of the shutter and the disk cartridge can be simplified. Further, the thickness of the disk cartridge can be reduced by the depth of the guide groove.
[0036]
Further, since the guide portion of the shutter is sandwiched between the upper shell and the lower shell, there is no movable portion on the upper shell surface even when the shutter is opened and closed.
[0037]
For this reason, even if the label is formed over a wide range on the upper shell surface, the label is not shielded by the opening / closing operation of the shutter. For example, when the housing of the optical disc recording / reproducing apparatus is formed of a transparent member, even if the disc cartridge is loaded in the optical disc recording / reproducing apparatus and the shutter is opened, the label information It becomes possible to confirm the contents of.
[0038]
Further, it is not necessary to make the upper shell surface flat in order to move the shutter, and for example, it is possible to form uneven portions for Braille.
[0039]
Further, in the cartridge holder of the conventional optical disc recording / reproducing apparatus, the disc cartridge shutter is fixed so that there is no member in contact with the shutter, for example, within the shutter movement range of the upper shell so that the shutter of the disc cartridge can move. However, in the disk cartridge having the above structure, since the shutter is not exposed on the upper shell surface, the upper shell portion is in contact with a part of the cartridge holder or the optical disk recording / reproducing apparatus. Even structure is acceptable.
[0040]
Therefore, restrictions on the cartridge holder or the optical disk recording / reproducing apparatus are reduced, and the thickness of the apparatus can be reduced.
[0041]
The said opening part may be continuously formed in the bottom face of a lower shell, and the side surface which has the 2nd guide surface of this lower shell.
[0042]
In this case, since the opening formed in the lower shell is opened from the bottom surface to the front surface of the lower shell, it is possible to design the pickup unit with the actuator closer to the optical disk in the disk cartridge. . As a result, a high-performance actuator can be designed, and a pickup unit having an objective lens with a small working distance corresponding to high-density recording can be arranged.
[0043]
In addition, the second guide surface of the lower shell may be provided so as to enter the center side from the outer shape of the disk cartridge.
[0044]
In this case, since the second guide surface of the lower shell enters the center side with respect to the outer shape of the disk cartridge, the outer shape of the disk cartridge can be reduced. Moreover, even if a protruding operation portion used for opening and closing the shutter is provided on the second guide surface, it can be provided without enlarging the outer shape of the disk cartridge.
[0045]
Further, a protrusion that protrudes in the outer direction of the disk cartridge and that is used to open and close the shutter may be provided in a vertical portion of the shutter.
[0046]
In this case, the projection used for opening and closing the shutter provided in the vertical part of the shutter is different from the hole provided for operation in the shutter as in the conventional example, and the shutter closed the opening. Even in the state, dust does not enter the shutter. Thereby, it is possible to provide a highly reliable disk cartridge having a large dustproof effect.
[0047]
Contact surfaces that contact the first and second guide surfaces of the upper shell or the lower shell may be provided on the lower shell or the upper shell.
[0048]
In this case, since the lower shell or the upper shell has contact surfaces that contact the first and second guide surfaces of the upper shell and the first and second guide surfaces of the lower shell, the shutter slides. The space for the shutter, i.e., the guide portion and the vertical portion of the shutter, has a desired size for the space formed by the first and second guide surfaces of the upper shell and the first and second guide surfaces of the lower shell. It becomes easy to decide.
[0049]
The contact surface may be provided continuously from the first or second guide surface provided on the lower shell or the upper shell.
[0050]
In this case, since the contact surface is provided from the first and second guide surfaces, the size of the space in which the shutter slides can be managed only by managing the height of the contact surface. Can be managed with high accuracy. In addition, since the contact surface is provided on the first guide surface, the thickness of the shell provided with the contact surface is increased accordingly, and the opening of the shell is cut out from the bottom surface to the front surface. However, it can be made strong in strength.
[0051]
The shutter may have a two-sheet configuration.
[0052]
In this case, by using two shutters, the size of the opening provided in the lower shell in the shutter slide direction can be increased to about a little less than half of the outer shape of the disk cartridge. The device can be equipped with a high-performance actuator.
[0053]
A lock lever that locks the movement of the shutter when the shutter closes the opening may be provided, and the lock lever may lock the shutter in a direction to urge the shutter toward the upper shell.
[0054]
In this case, the shutter is closed in the direction of urging the upper shell side by the lock lever, and the shutter is pressed in the opening of the lower shell. Can be provided.
[0055]
A spring may be provided that applies a biasing force for biasing the shutter in a direction to close the opening.
[0056]
In this case, since the spring is biased in the direction of closing the shutter, the shutter can be reliably closed and a highly reliable cartridge with a large dustproof effect can be provided.
[0057]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
An embodiment of the present invention will be described as follows.
[0058]
First, the disk cartridge according to the present embodiment will be described below with reference to FIGS. In this embodiment, an MD (mini disk) disk cartridge in which an optical disk is housed as a recording medium will be described. The same applies to other embodiments described below.
[0059]
1A is a perspective view of a disk cartridge (hereinafter referred to as a cartridge) 2 as viewed from above, and FIG. 1B is a perspective view of the disk cartridge as viewed from below. FIG. FIG. 3 is a perspective view of the inside of the cartridge 2 when the upper shell of the cartridge 2 is disassembled, and FIG. 3 is a perspective view of the inside of the cartridge 2 when the upper shell of the cartridge 2 is disassembled. FIG. 4 is a perspective view when the cartridge 2 is viewed from below when the shutter is open.
[0060]
As shown in FIGS. 1A and 1B, the cartridge 2 is composed of an upper shell 3, a lower shell 4, a shutter 7 and the like. Inside the cartridge 2, as shown in FIG. A recording prevention lever 9 and an optical disk 1 on which an information signal is recorded are accommodated.
[0061]
As shown in FIG. 4, the lower shell 4 includes a spindle motor (not shown) for rotating and holding the optical disc 1 and a pickup unit 27 (FIGS. 7 and 8A) for recording or reproducing information signals. It has the 1st opening part 5 which faces. Then, the entire cartridge 2 is mounted on an optical disk recording / reproducing apparatus described later to record / reproduce information. FIG. 7 is a view showing a state in which the pickup unit 27 faces the first opening 5 in the cross-sectional view taken along the line AA in FIG. FIG. 8A is a side view of the optical disc recording / reproducing apparatus 20 with the cartridge 2 mounted.
[0062]
As shown in FIGS. 1A, 1B, and 2, the shutter 7 is formed to be exposed on the lower shell 4 side and shields the first opening 5, and the shutter 7a. A vertical portion 7b formed on the side surface of the cartridge 2 and exposed to the side surface of the cartridge 2, and a guide portion 7c formed in the cartridge 2 by being bent. It is formed in a shape, that is, a substantially U-shaped cross section.
[0063]
The guide portion 7c is provided with a lock portion 7d that is locked to a lock lever 8 described later, and an open lever 24 (FIG. 8B) for opening and closing a shutter 7 described later is operated on the vertical portion 7b. The operation unit 7g is provided. FIG. 8B is a plan view of the optical disc recording / reproducing apparatus showing the inserted state of the cartridge 2.
[0064]
The operation portion 7g has a shape protruding from the vertical portion 7b, and a recess is provided in the central portion so that the tip of the open lever 24 can enter.
[0065]
Inside the upper shell 3, as shown in FIG. 3, a first guide surface 3a facing the guide portion 7c of the shutter 7 and a second guide surface 3b facing the vertical portion 7b of the shutter 7 are provided. And are provided.
[0066]
Further, inside the lower shell 4, as shown in FIG. 2, a first guide surface 4a facing the guide portion 7c of the shutter 7 and a second guide facing the vertical portion 7b of the shutter 7 are provided. A surface 4b is provided. The first guide surface 4a and the second guide surface 4b are provided with a first guide surface 3a of the upper shell 3 and a contact surface 4c that contacts the second guide surface 3b.
[0067]
Thus, since the lower shell 4 is provided with the contact surfaces 4c that contact the first and second guide surfaces 3a, 3b of the upper shell 3, a space for sliding the shutter 7, that is, the upper shell 3, the dimensions of the space surrounded by the first guide surface 3 a and the second guide surface 3 b of the lower shell 4 and the first guide surface 4 a and the second guide surface 4 b of the lower shell 4 can be determined exactly.
[0068]
The contact surface 4c is provided by the first guide surface 4a and the second guide surface 4b. That is, the contact surface 4 c is provided continuously from the first guide surface 4 a and the second guide surface 4 b of the lower shell 4.
[0069]
As described above, since the contact surface 4c is provided from the first and second guide surfaces 4a and 4b of the lower shell 4, the size control of the space in which the shutter 7 slides is the height control of the contact surface 4c. It can be done simply by doing it, and can be managed with higher accuracy.
[0070]
Further, since the contact surface 4c is provided on the first guide surface 4a of the lower shell 4, the thickness of the lower shell 4 is increased accordingly, and the first opening 5 of the lower shell 4 is opened. Even if it is cut out from the bottom to the front, it can be made strong in strength.
[0071]
That is, the first opening 5 of the lower shell 4 is an opening of only the bottom surface in the conventional example, but in the present embodiment, as shown in FIG. An opening is also formed in the direction of the guide surface 4b. That is, the first opening 5 is continuously formed on the bottom surface of the lower shell 4 and the side surface of the lower shell 4 having the second guide surface 4b. Even in such a case, there is no problem in strength.
[0072]
The opening on the second guide surface 4 b side is normally shielded by the vertical portion 7 b of the shutter 7.
[0073]
As described above, by providing the first opening 5 from the bottom surface to the side surface of the cartridge 2, the actuator 29 of the pickup unit 27 can be disposed close to the optical disc 1 even at the outer peripheral portion of the optical disc 1 as shown in FIG. 7. As a result, the degree of freedom in designing the actuator 29 is increased, and a high-performance actuator 29 can be designed.
[0074]
As shown in FIG. 5, the guide portion 7 c of the shutter 7 has a structure that is completely sandwiched between the first guide surface 3 a of the upper shell 3 and the first guide surface 4 a of the lower shell 4. The upper half of the vertical portion 7 b of the shutter 7 is sandwiched between the second guide surface 3 b of the upper shell 3 and the second guide surface 4 b of the lower shell 4. FIG. 5 is a cross-sectional view taken along line AA in FIG.
[0075]
As shown in FIG. 5, the contact surface 4 c of the lower shell 4 is in contact with the first guide surface 3 a and the second guide surface 3 b of the upper shell 3. The shutter 7 slides with a space formed by the first and second guide surfaces 3a, 3b, 4a and 4b as a guide.
[0076]
Thus, the shutter 7 slides in the space formed by the first and second guide surfaces 3a, 3b of the upper shell 3 and the first and second guide surfaces 4a, 4b of the lower shell 4, As shown in FIG. 17B, there is no need to provide the claw portion 107e of the shutter 107 and the guide groove 104d of the lower shell 104, which are provided so that the shutter 107 does not fall off as in the prior art, and the shutter and disk cartridge The structure can be simplified. Further, the thickness of the disk cartridge can be reduced by the depth of the guide groove 104d.
[0077]
As shown in FIG. 5, the shutter 7 includes a vertical portion 7 b and a shutter 7, a first guide surface 3 a and a second guide surface 3 b of the upper shell 3, and a first guide surface of the lower shell 4. 4a, the shutter 7 is slidable in the sliding direction, so that there is no possibility that the shutter 7 falls off the cartridge 2. That is, in order to prevent the shutter 7 from falling off the cartridge 2, it is not necessary to sandwich the lower shell 4 with a predetermined pressure between the shutter portion 7 a and the guide portion 7 c of the shutter 7. Can be done.
[0078]
Further, since the guide portion 7c of the shutter 7 is not exposed to the outer surface of the upper shell 3 and is sandwiched between the upper shell 3 and the lower shell 4, even if the shutter 7 is opened and closed, There is no effect on the upper shell 3 side. For this reason, even if the label is formed on the upper shell 3 in a wide range, the label is not shielded by the opening / closing operation of the shutter 7. For example, when the housing of the optical disc recording / reproducing apparatus 20 is formed of a transparent member, even when the cartridge 2 is loaded into the optical disc recording / reproducing apparatus 20 and the shutter 7 is opened. The contents of the label information can be confirmed. Furthermore, since it is not necessary to make the upper shell 3 surface flat in order to move the shutter 7, it is possible to form, for example, uneven portions for Braille.
[0079]
In the cartridge holder having the conventional structure, it is necessary to provide a certain gap so that the shutter can move, for example, within the shutter movement range of the upper shell so that there is no member in contact with the shutter. However, since the shutter 7 is not exposed on the surface of the upper shell 3 in the disk cartridge having the above configuration, the upper shell 3 portion is in contact with a part of the cartridge holder or the optical disk recording / reproducing apparatus. Is acceptable. Therefore, the restrictions on the cartridge holder or the optical disk recording / reproducing apparatus are reduced, and the apparatus can be reduced in thickness.
[0080]
As shown in FIG. 5, the cartridge 2 having the above configuration has a structure in which the second guide surface 4 b of the lower shell 4 enters the center side from the outer shape of the cartridge 2.
[0081]
If the amount of the second guide surface 4b is larger than the thickness of the shutter 7, the vertical portion 7b of the shutter 7 can be prevented from protruding from the side surface of the cartridge 2. As a result, the shutter 7 The external dimensions can be reduced.
[0082]
Further, since the operation portion 7g is formed to protrude outward in the vertical portion 7b of the shutter 7 that contacts the second guide surface 4b, the operation portion 7g does not protrude from the outer shape of the cartridge 2. Furthermore, it is preferable to adjust the amount of the second guide surface 4b entering.
[0083]
In addition, the operation portion 7g has a recess that is not penetrated, and an open lever 24 for opening and closing (operating) the shutter 7 is inserted into the recess, so that the shutter can be operated as in the conventional case. Since there is no need to provide a hole (through hole) for use (opening and closing), even if the front is opened as described above, dust does not enter from the hole even when the shutter is closed. A highly reliable cartridge having a large effect can be provided.
[0084]
The amount of entry of the lower shell 4 into the central portion side of the first guide surface 4a may be an amount necessary for hooking the operating portion 7g with the open lever 24 and operating it. That is, if the amount of protrusion of the operating portion 7g is set to an amount by which the open lever 24 is hooked on the operating portion 7g and the opening and closing operation of the shutter 7 can be performed stably, the above first guide according to the amount of protrusion. What is necessary is just to adjust the amount of penetration to the center part side of the surface 4a.
[0085]
In this case, by setting the above penetration amount to 5 times or more the plate thickness of the shutter 7, the operation portion 7 g can be reliably caught by the open lever 24, and the opening / closing operation of the shutter 7 can be stabilized. If this amount of entry is less than 5 times the plate thickness of the shutter 7, the amount of protrusion of the operation portion 7g is insufficient to prevent the operation portion 7g from protruding from the outer shape of the cartridge 2, and the open lever 24 However, the operation portion 7g is not caught well, and the opening / closing operation of the shutter 7 becomes unstable.
[0086]
In this embodiment, the thickness of the shutter 7 is 0.2 mm, and the vertical portion 7 b of the shutter 7 is 1.5 mm (7.5 times the thickness of the shutter 7) so as to enter the central portion side. A shutter 7 is formed.
[0087]
Further, the upper limit of the amount of the lower shell 4 entering the central portion of the first guide surface 4 a is up to the outside of the outer shape of the optical disk 1 in the cartridge 2.
[0088]
In the present embodiment, the outer shape of the cartridge 2 is 54 mm × 58 mm, and the disc diameter of the optical disc 1 is φ50.8 mm. In this case, the cartridge 2 has a structure that is 1.6 mm ((54-50.8) / 2) larger than the disk diameter of the optical disk 1 and 4 mm (58-54) larger on the shutter 7 side. . Therefore, when the cartridge 2 and the optical disc 1 are in the above-described conditions, the amount of the first guide surface 4a of the lower shell 4 entering the center portion may be set in the range of 1 mm to 5.6 mm. However, when the upper limit value is 5.6 mm, it is necessary to change the configuration of the second guide surface 4 b in the lower shell 4 of the cartridge 2. Therefore, in order to make the structure of the second guide surface 4b of the lower shell 4 shown in FIG. 2 and the like the same, it is necessary to set the amount of the second guide surface 4b entering the central portion side to about 3 mm. desirable.
[0089]
Next, the structure of the lock lever 8 will be described with reference to FIG. FIG. 6 is a partially enlarged view showing the accommodating portion of the lock lever 8 in FIG.
[0090]
The lock lever 8 is made of an elastic body having a spring property, and includes a locking portion 8a for locking the lock portion 7d of the shutter 7, and a taper portion 8b pushed down by a release member 23 provided in a cartridge holder 22 described later. In the state where the shutter 7 is closed, the shutter 7 is disposed at a position sandwiched between the guide portion 7 c of the shutter 7 and the lower shell 4.
[0091]
When the shutter 7 is closed, the lock portion 7 d of the shutter 7 is locked by the lock lever 8 disposed inside the upper and lower shells 3 and 4. At this time, the lock lever 8 is pressed against the upper shell 3 in the direction of pressing against the upper shell 3, and as a result, the shutter portion 7 a of the shutter 7 is pressed against the first opening 5 to improve the sealing performance. ing.
[0092]
The opening / closing operation of the shutter 7 in the cartridge 2 having the above structure will be described below with reference to FIGS. 6 and 8A and 8B.
[0093]
FIGS. 8A and 8B are views for explaining the operation when the cartridge 2 is inserted into the optical disc recording / reproducing apparatus 20, wherein FIG. 8A is a plan view, and FIG. It is a side view.
[0094]
First, the cartridge 2 is inserted into the cartridge holder 22 for mounting on the optical disc recording / reproducing apparatus 20. For this purpose, first, the taper portion 8 b of the lock lever 8 is pushed down by the release member 23 provided in the cartridge holder 22, and the lock portion 7 d of the shutter 7 is disengaged from the locking portion 8 a of the lock lever 8. Is unlocked.
[0095]
Next, the open lever 24 hooks the operating portion 7 g provided on the vertical portion 7 b of the shutter 7, and opens the shutter 7 in accordance with the insertion operation of the cartridge 2. When closing, the opposite operation is performed. The open lever 24 is biased so as to return to the cartridge insertion side by a spring (not shown), and closes the shutter 7.
[0096]
Below, the assembly method of the cartridge 2 of the said structure is demonstrated. The optical disk 1, the lock lever 8, the erroneous recording prevention lever 9, and the shutter 7 are inserted into the lower shell 4, and the upper shell 3 is simply placed and fixed by means such as ultrasonic welding. There is no need to deform and insert the shutter 7 in order to put 7e into the guide groove 4d, and this can be done easily. By pressing the contact surface 4c and the first and second guide surfaces 3a and 3b when the upper shell 3 is welded, the space in which the shutter 7 slides can be maintained with high accuracy.
[0097]
The cartridge width dimension is 54 mm, the depth dimension is 58 mm, the thickness dimension is 4 mm, and the optical disk diameter is φ50.8 mm with respect to the insertion direction of the cartridge 2. It is possible to provide the operation portion 7g with the projected shutter 7 by making the depth dimension the same as the increment from the width dimension as compared with the conventional cartridge.
[0098]
[Embodiment 2]
The following will describe another embodiment of the present invention. In the present embodiment, only portions different from those in the first embodiment will be described.
[0099]
The disc cartridge according to the present embodiment will be described below with reference to FIGS. 9 (a) and 9 (b) and FIG.
[0100]
FIG. 9A is a perspective view of the disk cartridge according to the present embodiment as viewed from above, and FIG. 9B is a perspective view of the disk cartridge according to the present embodiment as viewed from below.
[0101]
The disc cartridge according to the present embodiment is different from the disc cartridge of the first embodiment in the direction of insertion into the apparatus (optical disc recording / reproducing apparatus 20). That is, in the first embodiment, the direction of the first opening 5 of the cartridge 2 that exposes the optical disc 1 is formed in the front direction of the insertion direction of the cartridge 2. Is formed. This is the same direction as the conventional example.
[0102]
That is, the guide portion 7c of the shutter 7 of the cartridge 2 according to the present embodiment is sandwiched between the first guide surface 3a of the upper shell 3 and the first guide surface 4a of the lower shell 4. The vertical portion 7 b of the shutter 7 is sandwiched between the second guide surface 3 b of the upper shell 3 and the second guide surface 4 b of the lower shell 4, and the first opening 5 is the shutter 7. That the vertical portion 7b of the shutter 7 enters the central portion more than five times the plate thickness of the shutter 7 with respect to the outer shape of the cartridge 2, and the shutter 7 by the lock lever 8 The lock is urged in the direction of pressing against the upper shell 3 by the spring property of the lock lever 8, and the same as in the first embodiment.
[0103]
The difference from the first embodiment is the position where the first opening 5 of the cartridge 2 is formed, and the insertion direction into the cartridge holder 22 is different. Further, in the first embodiment, the open lever 24 for opening and closing the shutter 7 from the front in the insertion direction of the cartridge 2 is used as a member for opening and closing the shutter 7, but in this embodiment, FIG. (A) As shown in (b), an open lever 44 for opening and closing the shutter 7 from the side surface in the insertion direction of the cartridge 2 is used.
[0104]
When the cartridge 2 is mounted in the apparatus, the cartridge 2 is inserted into the cartridge holder 22. First, a protrusion 44 a provided at the tip of an open lever 44 provided with a spring property for opening and closing the shutter 7 provided in the cartridge holder 22 is provided. Simultaneously with the operation portion 7g of the shutter 7, the release member 43 provided on the open lever 44 pushes down the taper portion 8b of the lock lever 8 to release the lock of the shutter 7. Then, the shutter 7 is held at a predetermined position of the cartridge holder 22.
[0105]
Thereafter, when the cartridge 2 is pushed in, the main body of the cartridge 2 is inserted to the back. However, since the shutter 7 is held at that position, the shutter 7 is relatively opened.
[0106]
When closed, the protrusion 44a of the open lever 44 enters the operation portion 7g of the shutter 7. Therefore, even if the cartridge 2 is pulled out in the direction opposite to the insertion direction, the shutter 7 is held in that position, and the shutter 7 is When the cartridge 2 comes to the closed position, the release member 43 moves away from the shutter 7, the shutter 7 is locked by the lock lever 8, and the protrusion 44 a rides up from the operation portion 7 g of the shutter 7. It is pulled out from the holder 22.
[0107]
Thus, if the opening / closing direction of the shutter 7 is the same as that of the existing disk cartridge, there is an advantage that the existing optical disk recording / reproducing apparatus can be easily used.
[0108]
In the present embodiment, the vertical portion 7b of the shutter 7 enters the central portion more than five times the plate thickness of the shutter 7 from the outer shape of the cartridge 2, that is, the center of the second guide surface 4b of the lower shell 4. The structure has been described in which the amount of entry from the outer shape of the cartridge 2 to the portion side is 5 times or more the plate thickness of the shutter 7, but the amount of entry is the same as in the first embodiment. By setting the thickness to 5 times or more, the operating portion 7g can be reliably caught by the open lever 24, and the opening / closing operation of the shutter 7 can be stabilized. If this amount of entry is less than 5 times the plate thickness of the shutter 7, the amount of protrusion of the operation portion 7g is insufficient to prevent the operation portion 7g from protruding from the outer shape of the cartridge 2, and the open lever 24 However, the operation portion 7g is not caught well, and the opening / closing operation of the shutter 7 becomes unstable.
[0109]
In the present embodiment, as in the first embodiment, the shutter 7 has a plate thickness of 0.2 mm, and the vertical portion 7b of the shutter 7 is 1.5 mm on the center side (7 mm of the plate thickness of the shutter 7). The shutter 7 is formed so as to enter.
[0110]
Further, the upper limit of the amount of the lower shell 4 entering the central portion of the first guide surface 4 a is up to the outside of the outer shape of the optical disk 1 in the cartridge 2.
[0111]
In the present embodiment, as in the first embodiment, the outer shape of the cartridge 2 is 54 mm × 58 mm, and the disk diameter of the optical disk 1 is φ50.8 mm. In this case, the cartridge 2 has a structure that is 1.6 mm ((54-50.8) / 2) larger than the disk diameter of the optical disk 1 and 4 mm (58-54) larger on the shutter 7 side. . Therefore, when the cartridge 2 and the optical disc 1 are in the above-described conditions, the amount of the first guide surface 4a of the lower shell 4 entering the center portion may be set in the range of 1 mm to 5.6 mm. However, when the upper limit value is 5.6 mm, it is necessary to change the configuration of the second guide surface 4 b in the lower shell 4 of the cartridge 2. Therefore, in order to make the structure of the second guide surface 4b of the lower shell 4 shown in FIG. 2 and the like the same, it is necessary to set the amount of the second guide surface 4b entering the central portion side to about 3 mm. desirable.
[0112]
[Embodiment 3]
The following will describe still another embodiment of the present invention.
[0113]
Unlike the above-described embodiments, the disc cartridge according to the present embodiment has a double shutter structure to increase the opening of the first opening 5 for exposing the optical disc. ing.
[0114]
First, the disk cartridge according to the present embodiment will be described below with reference to FIGS.
[0115]
FIG. 11A is an external perspective view of a disk cartridge 32 (hereinafter referred to as a cartridge) 32 when viewed from above, and FIG. 11B is an external perspective view of the disk cartridge 32 when viewed from below. FIG. 13 is a perspective view of the inside of the cartridge 32 viewed from above when the upper shell of the cartridge 32 is disassembled, and FIG. 13 is a perspective view of the inside of the cartridge 32 viewed from below when the upper shell of the cartridge 32 is disassembled. FIG. 14 is a perspective view of the cartridge 32 when the shutter is open as viewed from below.
[0116]
As shown in FIGS. 11 (a) and 11 (b), the cartridge 32 is composed of an upper shell 33, a lower shell 34, a shutter 37, and the like. Inside the cartridge 32, as shown in FIG. A recording prevention lever 39 and an optical disk 31 on which information signals are recorded are accommodated.
[0117]
As shown in FIG. 14, the lower shell 34 includes a spindle motor (not shown) for rotating and holding the optical disk 31 and a pickup unit 27 (FIGS. 7 and 8A) for recording or reproducing information signals. A first opening 35 is provided. Then, the entire cartridge 32 is mounted on an optical disk recording / reproducing apparatus described later to record / reproduce information.
[0118]
The basic structure of the disc cartridge so far is almost the same as that of the first embodiment. That is, the upper shell 33 may be considered to be exactly the same as the upper shell 3 of the first embodiment, but the structure of the first opening 35 and the shutter 37 for the lower shell 34 is the same as that of the first embodiment. Different from the first opening 5 and the shutter 7 of the lower shell 4.
[0119]
Two shutters 37 are provided in the shutter slide direction to cover the first opening 35 formed in the lower shell 34 of the cartridge 32. As a result, the size of the first opening 35 in the shutter slide direction can be increased, the degree of design freedom such as the actuator 29 of the pickup unit 27 being increased, and the design of the high-performance actuator 29 can be achieved. It becomes possible.
[0120]
The detailed structure of the shutter 37 will be described below with reference to FIGS. 15 and 16. FIG. 15 is a cross-sectional view taken along the line B-B in FIG. 11A, and FIG. 16 is a perspective view showing the configuration of the main part of the lower shell 34 of the cartridge 32 according to the present embodiment.
[0121]
As shown in FIG. 15, the guide portion 37 c connected to the shutter portion 37 a of each shutter 37 has a structure sandwiched between the first guide surface 33 a of the upper shell 33 and the first guide surface 34 a of the lower shell 34. The vertical portion 37b of each shutter 37 is sandwiched between the second guide surface 33b of the upper shell 33 and the second guide surface 34b of the lower shell 34.
[0122]
In addition, the first opening 35 of the lower shell 34 opens to the side surface of the shutter 37, and the second guide surface 34 b of the lower shell 34 enters the center side from the outer shape of the cartridge 32. The shutter 37 is locked by the lock lever 38 and is urged in a direction to be pressed against the upper shell 33 by the spring property of the lock lever 38, etc., as in the cartridge 2 of the first embodiment.
[0123]
Therefore, the amount of the second guide surface 34 b of the lower shell 34 entering the center side is preferably 5 times or more the plate thickness of the shutter 37. In this case, by setting the above penetration amount to be five times or more the plate thickness of the shutter 37, the operation portion 37g can be reliably caught by the open lever 24, and the opening / closing operation of the shutter 37 can be stabilized. If the amount of penetration is less than 5 times the plate thickness of the shutter 37, the amount of protrusion of the operation portion 37g is insufficient to prevent the operation portion 37g from protruding from the outer shape of the cartridge 32, and the open lever 24 However, the operation portion 37g is not caught well, and the opening / closing operation of the shutter 37 becomes unstable.
[0124]
As described above, the structure of the shutter 37 of the cartridge 32 according to the present embodiment is only two, and the basic structure is the same as that of the shutter 7 of the first embodiment.
[0125]
However, since the shutter 37 has a two-sheet structure, the components necessary for the opening / closing operation are different from those of the cartridge 2 of the first embodiment.
[0126]
That is, as shown in FIG. 16, the lower shell 34 is provided with the return spring 11 that biases the first shutter 37 having the operation portion 37 g in the closing direction. The second shutter 37 performs an opening / closing operation by driving the interlocking portion 37 h by the first shutter 37.
[0127]
As described above, the cartridge 32 has the return spring 11 that applies an urging force in the direction in which the shutter 37 is closed. Therefore, the cartridge 32 is urged by the return spring 11 in the direction in which the shutter 37 is closed. The cartridge 32 can be reliably closed, and the cartridge 32 can be made highly reliable with a large dustproof effect.
[0128]
As described above, even if there are two shutters 37, the opening / closing operation is basically the same as the opening / closing operation of the shutter 7 in the first embodiment. Therefore, the detailed description is abbreviate | omitted.
[0129]
In the present embodiment, the cartridge width dimension is 54 mm, the depth dimension is 58 mm, and the thickness dimension is 5 mm with respect to the insertion direction of the cartridge 32. The dimension of the first opening 35 in the shutter slide direction is 24.8 mm.
[0130]
The cartridge 32 is provided with a lock lever 38 that locks when the two shutters 37 are closed, and the lock lever 38 locks the shutter 37 in a direction for urging the shutter 37 toward the upper shell 33.
[0131]
As described above, when the shutter 37 is closed by the lock lever 38 in a direction in which the shutter 37 is biased toward the upper shell 33, the shutter 37 is pressed against the first opening 35 of the lower shell 34. Therefore, the highly reliable cartridge 32 having a large dustproof effect can be provided.
[0132]
In each of the above first to third embodiments, a combination of the cartridge insertion direction, the shape of the lock lever associated therewith, the presence or absence of a return spring, the number of shutters, and the like is arbitrary, and is not limited to each embodiment. .
[0133]
In each of the above embodiments, the case where the present invention is applied to an MD disk cartridge that stores an optical disk as a recording medium has been described. However, the present invention is not limited to this. For example, a magneto-optical disk is stored. It can also be applied to MD and MO (magneto-optical disc) disk cartridges. Further, the present invention can also be applied to a disc cartridge in which a DVD (Digital Versatile Disc) -ROM or RAM is stored.
[0134]
【The invention's effect】
As described above, the disk cartridge of the present invention is a disk cartridge of the present invention in which a disk as a recording medium is accommodated in an internal space in which two shells are overlapped, and the disk is stored in one of the shells. In the disk cartridge provided with an opening for exposing a part and a shutter for opening and closing the opening, the shutter includes a shutter covering the opening, and the shutter And a guide portion that guides the shutter in the sliding direction, and the guide portion is sandwiched between opposing portions of the two shells when the two shells are overlapped with each other. It is the structure supported so that it can move freely.
[0135]
Therefore, since the guide portion constituting the shutter is sandwiched between the opposing portions of the two shells when the two shells are overlapped with each other, the shell is used in order to guide the shutter and prevent the dropout. Even without using the guide groove provided in the shutter, it is possible to prevent the shutter from falling off the shell.
[0136]
Thus, since the guide groove for preventing the shutter from falling off is not necessary, the structure of the shutter and the disk cartridge can be simplified, and the thickness of the disk cartridge can be reduced by the depth of the guide groove.
[0137]
In addition, since the guide portion of the shutter is supported while being sandwiched between the two shells, the shutter portion connected to the guide portion may not be directly involved in supporting the shutter. That is, it is not necessary to sandwich one shell between the shutter portion and the guide portion of the shutter as in the prior art. For this reason, there is no frictional force generated when the shell is sandwiched between the shutter portion and the guide portion of the shutter, so that the shutter can be smoothly slid.
[0138]
As described above, the disk cartridge of the present invention accommodates a disk as a recording medium in an internal space where the upper shell and the lower shell are overlapped, and an opening for exposing a part of the disk to the lower shell. And a shutter for opening and closing the opening is slidably provided. The shutter includes a shutter covering the opening, a vertical portion connected to the shutter, and a vertical portion. A connecting guide portion is formed in a substantially U-shaped cross section, and the guide portion of the shutter includes a first guide surface formed inside the upper shell in a direction parallel to the bottom surface of the shell, and the lower shell. The vertical portion of the shutter is sandwiched between a first guide surface formed in a direction parallel to the bottom surface of the shell, and the shutter is placed inside the lower shell. Sandwiched between a second guide surface formed in a direction parallel to the sliding direction of the upper shell and a second guide surface formed in a direction parallel to the side surface of the upper shell inside the upper shell. It is the composition which is.
[0139]
Therefore, since the guide portion and the vertical portion of the shutter slide in the space formed by the first and second guide surfaces of the upper shell and the first and second guide surfaces of the lower shell, Therefore, it is not necessary to provide the claw portion of the shutter and the guide groove of the lower shell which are provided so as not to drop out, and the structure of the shutter and the disk cartridge can be simplified. Further, the thickness of the disk cartridge can be reduced by the depth of the guide groove.
[0140]
Further, since the guide portion of the shutter is sandwiched between the upper shell and the lower shell, there is no movable portion on the upper shell surface even when the shutter is opened and closed.
[0141]
For this reason, even if the label is formed over a wide range on the upper shell surface, the label is not shielded by the opening / closing operation of the shutter. For example, when the housing of the optical disc recording / reproducing apparatus is formed of a transparent member, even if the disc cartridge is loaded in the optical disc recording / reproducing apparatus and the shutter is opened, the label information The contents of can be confirmed.
[0142]
Further, it is not necessary to make the upper shell surface flat in order to move the shutter, and for example, it is possible to form uneven portions for Braille.
[0143]
Further, in the cartridge holder of the conventional optical disc recording / reproducing apparatus, the disc cartridge shutter is fixed so that there is no member in contact with the shutter, for example, within the shutter movement range of the upper shell so that the shutter of the disc cartridge can move. However, in the disk cartridge having the above structure, since the shutter is not exposed on the upper shell surface, the upper shell portion is in contact with a part of the cartridge holder or the optical disk recording / reproducing apparatus. Even structure is acceptable.
[0144]
Therefore, the restrictions on the cartridge holder or the optical disk recording / reproducing apparatus are reduced, and the apparatus can be reduced in thickness.
[0145]
The said opening part may be continuously formed in the bottom face of a lower shell, and the side surface which has the 2nd guide surface of this lower shell.
[0146]
In this case, since the opening formed in the lower shell is opened from the bottom surface to the front surface of the lower shell, it is possible to design the pickup unit with the actuator closer to the optical disk in the disk cartridge. . Thus, it is possible to design a high-performance actuator and to arrange a pickup unit having an objective lens with a small working distance corresponding to high-density recording.
[0147]
In addition, the second guide surface of the lower shell may be provided so as to enter the center side from the outer shape of the disk cartridge.
[0148]
In this case, since the second guide surface of the lower shell enters the center side with respect to the outer shape of the disk cartridge, the outer shape of the disk cartridge can be reduced. In addition, even if a protruding operation portion used for opening and closing the shutter is provided on the second guide surface, there is an effect that the disk cartridge can be provided without increasing the outer shape.
[0149]
Further, a protrusion that protrudes in the outer direction of the disk cartridge and that is used to open and close the shutter may be provided in a vertical portion of the shutter.
[0150]
In this case, the projection used for opening and closing the shutter provided in the vertical part of the shutter is different from the hole provided for operation in the shutter as in the conventional example, and the shutter closed the opening. Even in the state, dust does not enter the shutter. Thereby, there is an effect that it is possible to provide a highly reliable disk cartridge having a large dustproof effect.
[0151]
Contact surfaces that contact the first and second guide surfaces of the upper shell or the lower shell may be provided on the lower shell or the upper shell.
[0152]
In this case, since the lower shell or the upper shell has contact surfaces that contact the first and second guide surfaces of the upper shell and the first and second guide surfaces of the lower shell, the shutter slides. The space for the shutter, that is, the guide portion and the vertical portion of the shutter, is a desired size of the space formed by the first and second guide surfaces of the upper shell and the first and second guide surfaces of the lower shell. There is an effect that it is easy to decide.
[0153]
The contact surface may be provided continuously from the first or second guide surface provided on the lower shell or the upper shell.
[0154]
In this case, since the contact surface is provided from the first and second guide surfaces, the size of the space in which the shutter slides can be managed only by managing the height of the contact surface. Can be managed with high accuracy. In addition, since the contact surface is provided on the first guide surface, the thickness of the shell provided with the contact surface is increased accordingly, and the opening of the shell is cut out from the bottom surface to the front surface. However, there is an effect that it can be made strong in strength.
[0155]
The shutter may have a two-sheet configuration.
[0156]
In this case, by using two shutters, the size of the opening provided in the lower shell in the shutter slide direction can be increased to about a little less than half of the outer shape of the disk cartridge. There is an effect that a high-performance actuator can be mounted on the apparatus.
[0157]
A lock lever that locks the movement of the shutter when the shutter closes the opening may be provided, and the lock lever may lock the shutter in a direction to urge the shutter toward the upper shell.
[0158]
In this case, the shutter is closed in the direction of urging the upper shell side by the lock lever, and the shutter is pressed in the opening of the lower shell. There is an effect that can be provided.
[0159]
A spring may be provided that applies a biasing force for biasing the shutter in a direction to close the opening.
[0160]
In this case, since the spring is biased in the direction of closing the shutter, the shutter can be reliably closed, and an advantageous effect that a highly reliable cartridge having a large dustproof effect can be provided.
[Brief description of the drawings]
1A and 1B show a disk cartridge according to an embodiment of the present invention, in which FIG. 1A is a perspective view of the disk cartridge as viewed from above, and FIG. 1B is a perspective view of the disk cartridge as viewed from below.
FIG. 2 is an exploded perspective view of the disk cartridge shown in FIG.
FIG. 3 is an exploded perspective view of the disc cartridge shown in FIG.
4 is a perspective view showing a shutter open state of the disk cartridge shown in FIG. 1 (b). FIG.
FIG. 5 is a cross-sectional view taken along line AA in FIG.
6 is a view showing a main part of a lower shell of the disk cartridge shown in FIG. 2. FIG.
7 is a cross-sectional view showing a state where the shutter is opened and an actuator is inserted in the disk cartridge shown in FIG.
8A and 8B show an optical disc recording / reproducing apparatus, in which FIG. 8A is a side view and FIG. 8B is a plan view.
9A and 9B show a disk cartridge according to another embodiment of the present invention, in which FIG. 9A is a perspective view of the disk cartridge as viewed from above, and FIG. 9B is a perspective view of the disk cartridge as viewed from below.
FIG. 10 is an exploded perspective view of the disk cartridge shown in FIG.
11A and 11B show a disk cartridge according to still another embodiment of the present invention, in which FIG. 11A is a perspective view of the disk cartridge as viewed from above, and FIG. 11B is a perspective view of the disk cartridge as viewed from below.
12 is an exploded perspective view of the disk cartridge shown in FIG.
13 is an exploded perspective view of the disk cartridge shown in FIG. 11 (b).
14 is a perspective view showing a shutter open state of the disk cartridge shown in FIG.
15 is a cross-sectional view taken along line BB in FIG. 11 (a).
16 is a view showing a main part of a lower shell of the disk cartridge shown in FIG. 12. FIG.
17A and 17B show a conventional disk cartridge, in which FIG. 17A is a plan view, FIG. 17B is a bottom view, and FIG. 17C is a side view.
18A and 18B show a state where the cartridge is being inserted into the cartridge holder, wherein FIG. 18A is a plan view and FIG. 18B is a side view.
FIG. 19 is a cross-sectional view taken along the line C—C in FIG.
20A and 20B show an optical disc recording / reproducing apparatus, in which FIG. 20A is a plan view and FIG. 20B is a side view.
21A and 21B show a conventional disk cartridge, wherein FIG. 21A is a perspective view of the disk cartridge as viewed from above, and FIG. 21B is a perspective view of the disk cartridge as viewed from below.
22 is a cross-sectional view of the main part showing a shutter mounting structure in the disk cartridge shown in FIGS. 21 (a) and 21 (b). FIG.
[Explanation of symbols]
1 Optical disc
2 Cartridge (disk cartridge)
3 Upper shell
3a First guide surface
3b Second guide surface
4 Lower shell
4a First guide surface
4b Second guide surface
4c Contact surface
4d guide groove
5 First opening
7 Shutter
7a Shutter part
7b Vertical part
7c Guide part
7d Lock part
7e claw
7g Operation unit
8 Lock lever
8a Locking part
8b Taper part
9 False record prevention lever
11 Return spring
20 Optical disk recording / reproducing apparatus
22 Cartridge holder
23 Release member
24 Open lever
27 Pickup unit
29 Actuator
31 Optical disc
32 cartridge (disk cartridge)
33 Upper shell
33a First guide surface
33b Second guide surface
34 Lower shell
34a First guide surface
34b Second guide surface
35 First opening
37 Shutter
37 Shutter
37b vertical section
37c Guide part
37g Operation unit
37h Interlocking part
38 Lock lever
39 Misrecording prevention lever
43 Unlocking member
43 Release member
44 Open lever
44a Projection

Claims (9)

A disk as a recording medium is accommodated in an internal space where the upper shell and the lower shell are overlapped, and an opening for exposing a part of the disk is provided in the lower shell, and the opening is opened and closed. In a disc cartridge provided with a slidable shutter for
In the shutter, a shutter portion covering the opening, a vertical portion connected to the shutter portion, and a guide portion connected to the vertical portion are formed in a substantially U-shaped cross section, and the guide portion of the shutter is formed inside the upper shell. Sandwiched between a first guide surface formed in a direction parallel to the bottom surface of the shell and a first guide surface formed in a direction parallel to the bottom surface of the shell inside the lower shell,
The vertical portion of the shutter includes a second guide surface formed in the lower shell so as to extend in a direction parallel to the sliding direction of the shutter, and a direction parallel to the side surface of the upper shell in the upper shell. A disc cartridge that is sandwiched between a second guide surface formed on the disc. 2. The disk cartridge according to claim 1, wherein the opening is formed continuously on a bottom surface of the lower shell and a side surface having the second guide surface of the lower shell.   2. The disk cartridge according to claim 1, wherein the second guide surface of the lower shell is provided so as to enter the center side from the outer shape of the disk cartridge. The vertical portion of the shutter protrudes disc cartridge outer direction, the disk cartridge according to claim 1, wherein a protruding portion that is used to open and close of the shutter is provided. That abutment surface which abuts the first guide surface of the upper shell is either provided on the lower shell, or abutment surface which abuts the first guide surface of the lower shell is provided in the upper shell The disk cartridge according to claim 1 , wherein the disk cartridge is a disk cartridge. When the contact surface is provided on the lower shell , the contact surface is provided continuously from the first guide surface provided on the lower shell, while when the contact surface is provided on the upper shell , the contact surface is provided on the upper shell. 6. The disk cartridge according to claim 5, wherein the disk cartridge is provided continuously from one guide surface . 2. The disc cartridge according to claim 1 , wherein the shutter has a two-sheet configuration. A lock lever is provided for locking the movement of the shutter when the shutter closes the opening;
2. The disk cartridge according to claim 1 , wherein the lock lever locks the shutter in a direction for urging the shutter toward the upper shell. 2. The disk cartridge according to claim 1 , further comprising a spring that applies a biasing force for biasing the shutter in a direction to close the opening.

Images