JPH0521722Y2 - - Google Patents

Description

[Detailed description of the invention] [Summary] The purpose of this invention is to prevent the shutter of a disk cartridge that stores disks such as optical disks from being easily opened and closed. This objective is achieved by adopting a locking mechanism in which the locking plate does not rotate simply by pressing the shutter in the opening direction.

[Industrial application field]

The present invention relates to a shutter lock mechanism for a disk cartridge for storing disks such as optical disks.

In this type of disk cartridge, if the disk surface becomes dirty due to external dust, fingerprints, etc., reading will occur, and the writing (R/W) characteristics will be adversely affected. In order to solve this problem, a shutter is usually provided in the cartridge housing of the disk cartridge. It is desirable that this shutter has a structure that opens smoothly when the disk cartridge is installed in the drive position, but does not open easily when it is not in use. Due to such demands,
A locking mechanism is added to the shutter.

[Conventional technology]

FIG. 7 is a perspective view showing the external appearance of the optical disk cartridge, FIG. 8 is a cross-sectional view along the - arrow in FIG. 7, and FIG. 9 is a plan view showing a conventional shutter lock mechanism applied to this optical disk cartridge. In the figure, 1 is a cartridge case, 2 is a shutter, and 3 is a lock plate. The cartridge housing 1 is composed of an upper case 4 and a lower case 5, and houses an optical disk 6 therein. The upper case 4 and the lower case 5 are provided with R/W openings 7 and 8 facing each other, and the shutter 2 is provided to open and close the opening 7. The shutter 2 is slidable in the directions of arrows A and B (the A direction is the opening direction and the B direction is the closing direction) along the end surface 9 of one end of the cartridge housing 1, and when it is positioned at the closed position shown in the figure ( (The positioning method will be described later) The opening/closing parts 7 and 8 are closed. This shutter 2 has a bent portion 10 at the end in the direction of arrow B, and has a cartridge housing 1.
It is biased in the direction of arrow B by a shutter return spring 11 provided therein. The lock plate 3 is rotatably provided in the cartridge housing 1 in close proximity to one end of the housing, and includes an inclined surface 12 and a recess 13.
The tip end is biased by a spring 14 in a direction toward the shutter 2 (in the direction of arrow C in FIG. 9).

When the optical disk cartridge having such a configuration is not in use, the shutter 2, which is biased in the direction of arrow B by the spring 11, is bent into the recess 13 of the lock plate 3, which is biased in the direction of arrow C by the spring 14.
0 is engaged and locked in the closed position of FIG. In this state, since the openings 7 and 8 are closed, the stored optical disk 6 is prevented from becoming dirty.

When using the optical disk cartridge with the shutter 2 closed in this manner, the optical disk cartridge is inserted into a drive device (not shown) in the direction of arrow P in FIG. 9. During this installation process, the roller 16 at the tip of the shutter opening/closing arm 15 provided on the drive device side first engages with the lock plate 3 and pushes the lock plate 3 in the direction of arrow D against the biasing force of the spring 14. Rotate it. As this rotation progresses, the concave portion 13 of the lock plate 3 is removed from the bent portion 10, and after that, the arm 15 swings in the direction of the arrow E while the shutter 2 is moved by the roller 16 against the urging force of the spring 11 as shown in the arrow A. slide in the direction. In this case, the roller 16 is guided by the guide portion 17 of the cartridge housing 1 and moves in the direction of arrow A to slide the shutter 2. When the cartridge has been completely installed, the shutter 2 is completely opened and the openings 7 and 8 are opened, allowing the head to perform R/W from these open portions.

When the optical disk cartridge is pulled out from the drive device after use, the arm 15 is biased by a return spring (not shown) and rotates in the direction of arrow F. Along with this, the shutter 2 is biased by the spring 11 and rotates in the direction of arrow F. Slide in direction B. The shutter 2 sliding in the direction of arrow B engages with the inclined surface 12 of the lock plate 3, rotates the lock plate 3 in the direction of arrow D, climbs over the lock plate 3, and returns by rotating in the direction of arrow C. By engaging the bent portion 10 with the recess 13 of the locking plate 3, the locking plate 3 is locked in the closed position shown in FIG.

[Problem that the invention attempts to solve]

However, in such a conventional shutter lock structure, the rotation center of the lock plate 3 provided in the cartridge housing 1 is located at the recess 13 as shown in FIG.
is located below by a distance e, so when a strong force in the direction of arrow A is applied to the shutter 2, a torque in the direction of arrow D acts on the lock plate 3, and the lock plate 3
rotates in the same direction, the shutter lock (the engagement between the bent portion 10 and the recessed portion 13) is released, and the shutter 2
The disadvantage was that it opened the door.

[Means for solving problems]

The present invention provides a shutter lock mechanism for a disk cartridge that can solve the above-mentioned problems, and as a means for that purpose, it includes a cartridge housing having openings for writing and reading and storing a disk; The cartridge housing is provided so as to be slidable between an open position and a closed position along an end surface of one end of the cartridge housing, and is biased in the closing direction by a first biasing means to attach the cartridge housing to a drive device. a shutter that is slid in the opening direction from the closed position by engagement with the drive device to open the opening; is biased in one rotation direction toward the shutter, and resists the biasing force of the second biasing means prior to sliding of the shutter due to engagement with the drive device side when the cartridge housing is installed. and a lock plate that is rotated, and the lock plate engages with a protrusion of the shutter that is energized by the first energizing means to cause the shutter to slide in the closing direction. The protrusion of the shutter that has climbed over the inclined surface and reached the closed position is engaged with the shutter in the opening direction with some clearance, and this engaged state is maintained when the locking plate is attached. In a disk cartridge provided with a recessed portion for holding the shutter partway through the rotational movement, a first engaging portion is provided on the protrusion of the shutter, and the protrusion of the shutter in the closed position is arranged in the recessed portion on the lock plate. A second engaging portion is provided which engages with the first engaging portion to lock rotation of the lock plate when the shutter moves in the shutter opening direction.

[Effect]

When a strong force is applied to the shutter in the opening direction when the disk cartridge is not in use, the protrusion of the shutter moves in the opening direction within the recess of the lock plate, and the engagement of the first and second engaging parts causes the lock plate to close. Rotation is locked. Therefore, even if torque is applied to the lock plate by subsequently applying a force in the opening direction, the lock plate will not rotate.

Therefore, reliable locking of the shutter is possible.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 6.

A first embodiment is shown in FIGS. 1 and 2.

FIG. 1 is a plan view showing the shutter lock mechanism of the disk cartridge according to the present invention, and FIG.
This is a sectional view taken in the direction of the - arrow in the figure. In the figure, 21 is a shutter, and 22 is a lock plate. In addition, members with the same configuration as before are given the same symbols as before, and 1
1 is a cartridge housing, 6 is an optical disk (disc), 8 is an opening, 9 is an end surface of one end surface of the cartridge housing 1, and 11 is a spring for returning the shutter (the first
14 is a spring for returning the lock plate (second energizing means), 15 is an arm for opening and closing the shutter,
16 is a roller, and 17 is a guide section.

The shutter 21 is integrally provided with a bent portion (protrusion) 23 at the end in the direction of arrow B (closing direction), and has an end surface 9
along arrows A and B directions (arrow A direction is the opening direction)
It is possible to move to The bent portion 23 is provided with a hole (first engaging portion) 24, as shown in FIG.

The locking plate 22 has an inclined portion 25 and a hook-shaped recessed portion 2.
6, and is rotatably provided within the cartridge housing 1 close to one end of the housing. This recess 2
The protruding portion (second engaging portion) 27 of the lock plate 22 that protrudes into the shutter 6 constitutes a locking means for locking the rotation of the lock plate 22 (details will be described later) together with the hole 24 of the shutter bent portion. There is.

The shutter 21 is positioned at the closed position shown in FIG. 1 when the disk cartridge is not in use. In this state, the bent portion 23 engages with the left inner wall of the recess 26 due to the biasing force of the spring 11 that biases the shutter 21, and is separated from the protrusion 27.

Now, if a strong force in the direction of arrow A is applied to the shutter 21 from this state, the shutter 21 will slide in the direction of arrow A against the urging force of the spring 11, and along with this, the bent portion 23 will move in the same direction within the recess 26. do. This movement causes the hole 24 of the bent portion 23 to
is fitted into the protruding portion 27 of the lock plate, and even if a torque in the direction of arrow D is applied to the lock plate 22 due to the subsequent movement of the bent portion 23, the lock plate 22 does not rotate. That is, the rotation of the lock plate 22 is stopped by the action of the locking means consisting of the hole 24 and the protrusion 27, and the shutter is maintained in the locked state.

When a disk cartridge having such a structure is attached to and removed from a drive device, the functions of each component are the same as those of the conventional disk cartridge.

A second embodiment is shown in FIGS. 3 and 4.

FIG. 3 is a plan view showing essential parts of the shutter lock mechanism of the disk cartridge, and FIG. 4 is a sectional view taken along the arrow - 3 in FIG. 3. In the figure, 31 is a shutter. The other configurations are the same as the previous example. A flange (first engaging portion) 33 is formed on the bent portion (protrusion) 32 of the shutter 31, and this flange 33 and the protruding portion 27 of the lock plate 22 prevent the shutter 31 from being forced open. Time lock plate 22
It constitutes a locking means for locking the rotation. The flange 33 is separated from the protrusion 27 when the shutter 31, which is biased in the closing direction by a spring, is positioned in the closed position as shown in FIG. When the lock plate 22 is slid, it engages with the protrusion 27 and locks the rotation of the lock plate 22.

A third embodiment is shown in FIGS. 5 and 6.

FIG. 5 is a plan view showing essential parts of the shutter lock mechanism of the disk cartridge, and FIG. 6 is a cross-sectional view taken along the arrow -- in FIG. 5. In the figure, 41 is a shutter. The other configurations are similar to the first embodiment.
A protrusion 42 is integrally formed on the shutter 41,
The protrusion 42 is integrally formed with a protrusion (first engaging portion) 43 that protrudes to the right in FIG.
This protrusion 43 and the protrusion 27 of the lock plate 22 constitute a locking means for locking the rotation of the lock plate 22. The function of this locking means is similar to that of the previous example, and when the shutter 42 is slid in the opening direction, both the protrusions 27 and 43 engage to lock the rotation of the lock plate 22.

[Effect of idea]

As described above, according to the present invention, when the shutter is moved from the closed position to the opening direction, the first engaging part provided on the protrusion of the shutter and the second engaging part provided on the lock plate Since the lock plates are engaged with each other to prevent rotation of the lock plate, it is possible to reliably maintain the shutter lock state when the disk cartridge is not in use.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the shutter lock mechanism of a disk cartridge according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the - sectional arrow in FIG. 1, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a plan view showing the main parts of the shutter lock mechanism of the disk cartridge of the present invention, FIG.
FIG. 6 is a cross-sectional view taken along the - sectional arrow in FIG. 5, FIG. 7 is a perspective view showing the external appearance of the optical disk cartridge, and FIG. is - in Figure 7
9 is a plan view showing the shutter lock mechanism of a conventional optical disk cartridge. In the figure, 1 is a cartridge housing, 6 is an optical disk (disk), 7 and 8 are openings, and 9 is a plan view showing the shutter lock mechanism of a conventional optical disk cartridge. End face, 11 is a shutter return spring (first biasing means), 14 is a lock plate return spring (second biasing unit), 15 is a shutter opening/closing arm, 21, 31, 41 is a shutter, 22 is a lock plate, 23 and 32 are bent parts (protrusions), 24 is a hole (first engaging part), 25 is an inclined surface, 26 is a recessed part, 27 is a protruding part, (second engaging part), 33 is a flange (first engaging portion), 42 is a protrusion, and 43 is a protruding portion (first engaging portion).

Claims (1)

[Claims for Utility Model Registration] A cartridge housing having a writing and reading opening and housing a disk; and a cartridge housing that slides between an open position and a closed position along an end surface of one end of the cartridge housing. The cartridge case is configured such that it can be biased in the closing direction by a first biasing means, and when the cartridge housing is installed in the drive device, the cartridge housing is slid from the closed position in the open direction by engagement with the drive device. a shutter for opening the opening; and a second biasing means rotatably provided within the cartridge housing, the distal end of which is biased in one rotation direction toward the shutter, and the cartridge housing is mounted. and a lock plate which is rotated against the urging force of the second urging means prior to sliding of the shutter by engagement with the drive device side, and the lock plate includes the above-mentioned lock plate. a sloped surface that engages with a protrusion of the shutter that is activated by a first activation means to enable the shutter to slide in the closing direction; In the disk cartridge, the disk cartridge is provided with a projection and a recess that engages with a margin in the opening direction of the shutter and maintains this engaged state until the middle of the rotational movement of the lock plate at the time of mounting. a first engaging portion is provided on the protrusion, and the lock plate is configured to engage with the first engaging portion when the protrusion of the shutter in the closed position moves in the shutter opening direction within the recess. A shutter lock mechanism for a disk cartridge, characterized in that a second engaging portion is provided for locking rotation of a lock plate.