JP2010153001A - Disk device and method of forming disk detection arm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a force of a roller 5 to harness a disk detection arm 2 in a disk device 1. <P>SOLUTION: The disk device 1 includes a roller 5 for conveying a disk 8 by abutting on a disk surface to rotate, a disk detection arm 2 abutting on the edge of the disk 8 and turning by the conveyance of the disk 8, and a motor 7 for separating, when the conveyance of the disk 8 is completed, the roller 5 from the disk surface to move the roller 5 to the disk detection arm 2 side. In a part of the disk detection arm 2, a leaf spring 3 is provided to function as a protruding part to elastically come in contact with the roller 5 when the motor 7 moves the roller 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a disk device and a method for forming a disk detection arm.

  Various movable parts are used in a disk device that reproduces a CD (Compact Disc), a DVD, or records information on a CD, a DVD, or the like. One of the movable parts is a disk detection arm. The disc detection arm is a component for detecting that a disc has been inserted into or ejected from the disc device.

  Generally, a movable part such as a disk detection arm is incorporated so as to have a slight gap with other parts in order to move smoothly. Therefore, in a situation where vibration is applied to the disk device, the movable part may also vibrate, and abnormal noise may occur due to contact with surrounding parts. Therefore, it is preferable that a movable part such as a disk detection arm is fixed when it does not play the role.

  Here, a conventional example of a method for fixing the disk detection arm will be described. 12 to 18 are diagrams for explaining a conventional method of fixing a disk detection arm. First, the main configuration of the disk device 50 will be described with reference to FIG. The disk device 50 includes a disk detection arm 51, a rib 52 that is a convex portion formed on the disk detection arm 51, a shaft 53 that is the center of rotation of the disk detection arm 51, a disk transport roller 54, and a disk insertion completion. And a motor 56 for driving the roller 54.

  Next, the operation of each part in the conventional disk device 50 will be described. As shown in FIG. 12, when the disk 57 is inserted into the disk device 50, the edge of the disk 57 comes into contact with the disk detection arm 51. The disc detection arm 51 rotates about the shaft 53 when the edge of the inserted disc 57 comes into contact therewith. The state of rotation of the disk detection arm 51 is converted into an electric signal by a sensor (not shown) or the like. A control unit (not shown) of the disk device 50 can detect insertion and ejection of the disk 57 by detecting the rotation state of the disk detection arm 51 converted into an electrical signal.

  When the controller of the disk device 50 detects that the disk 57 has been inserted by rotating the disk detection arm 51, the controller 56 rotates the disk transport roller 54 by driving the motor 56. The roller 54 contacts the back surface of the disk 57 and conveys the disk 57 to a predetermined position.

  As shown in FIG. 13, when the disk 57 is conveyed to a predetermined position by the rotation of the roller 54, the edge of the disk 57 comes into contact with the trigger lever 55. When the edge of the disk 57 comes into contact with the trigger lever 55, the drive transmission of the mechanism is mechanically switched by the rotation of the trigger lever 55. When the disk 57 comes into contact with the trigger lever 55, the roller 54 is moved in the direction of the rib 52 (in the direction of the arrow) by driving the motor 56 as shown in FIG. FIG. 15 is a perspective view of the disk detection arm 51. As shown in FIG. 15, the above-described rib 52 is formed integrally with the disc detection arm 51.

  FIG. 16 is a view of the state of FIG. 12 as viewed from above. FIG. 17 is a view of the state of FIG. 14 as viewed from above. As shown in FIGS. 16 and 17, two disc detection arms 51 are provided on the left and right of the insertion portion of the disc 57 (see, for example, Patent Document 1). The disc detection arm 51 rotates about the shaft 53 according to the position of the disc 57. The insertion (conveyance) of the disk 57 is completed at a position where the edge of the disk 57 comes into contact with the trigger lever 55 and the trigger lever 55 rotates by a predetermined angle.

JP-A-10-3722

  18 is a view of the states of FIGS. 14 and 17 as seen from the direction in which the disc 57 is inserted. As shown in FIG. 18, when the roller 54 moves in the direction of the disk detection arm 51 (in the direction of the arrow), the roller 54 and the rib 52 provided on the disk detection arm 51 are in contact with each other. As a result, the disk detection arm 51 is fixed by the pressure of the roller 54.

  At this time, it is necessary to allow the roller 54 and the rib 52 to be in contact with each other in consideration of the variation in the size of the position where the roller 54 is lowered. Therefore, it is necessary to set the driving torque of the motor 56 that pushes down the roller 54 so that the roller 54 further suppresses the rib 52 after the roller 54 comes into contact with the rib 52. Thereby, as shown in FIG. 18, the roller 54 comes into contact with the rib 52 to bend.

  In such a conventional fixing method of the disk detection arm 51, the roller 54 needs to suppress the rib 52 with a considerably large load that causes the roller 54 to bend. As a result, the driving torque of the motor 56 for pushing the roller 54 toward the rib 52 also increases. Generating such a large driving torque each time the disk 57 is inserted is not preferable because it causes a significant reduction in the life of the motor 56.

  Further, the force with which the roller 54 holds the rib 52 depends on the elasticity of the roller 54 in addition to the driving torque of the motor 56. If the material of the roller 54 is rubber, for example, the elasticity of the roller 54 changes greatly between summer when the temperature is high and winter when the temperature is low. Therefore, it is necessary to match the driving torque of the motor 56 with the winter when the elasticity is small, and the driving torque is a considerably large value. Generation of such a large driving torque is not preferable for the life of the motor 56.

  Further, in order to reduce the motor driving load, it is necessary to reduce (reduce) the dimensional tolerances of a plurality of parts, which makes it difficult to design, assemble, adjust, and manage the disk device 50 (inventory management, transportation management, etc.).

  Further, it is not preferable that the shape of the roller 54 may be deformed when the roller 54 is pressed against the rib 52.

  The present invention has been made under such a background, and an object of the present invention is to provide a disk device and a method for forming a disk detection arm that can reduce the force with which a roller restrains the disk detection arm. .

  The disk device of the present invention has a roller that contacts the disk surface and conveys the disk by rotational movement, a disk detection arm that contacts the edge of the disk and rotates as the disk is conveyed, and the conveyance of the disk is completed And a means for separating the roller from the disk surface and moving the roller toward the disk detection arm side, and the elastic force is applied to the roller when the moving means moves the roller to a part of the disk detection arm. It has a protruding part that has and contacts. For example, the protrusion is a plate-like spring.

  The disc detection arm formation method of the present invention is a disc detection arm formation method that contacts an edge of a disc and rotates as the disc is conveyed. It is formed as a spring.

  According to the present invention, it is possible to reduce the force with which the roller restrains the disk detection arm.

(Configuration of the disk device 1 according to the embodiment of the present invention)
A configuration of the disk device 1 according to the embodiment of the present invention will be described. FIGS. 1-8 is a figure for demonstrating the fixing method of the disc detection arm based on Embodiment of this invention. The disk device 1 includes a disk detection arm 2, a plate spring 3 that is a plate-like protrusion formed on the disk detection arm 2, a shaft 4 that is the center of rotation of the disk detection arm 2, and a disk transport roller. 5. A trigger lever 6 that rotates when the disc is inserted, and a motor 7 for driving the roller 5 are provided.

(Operation of the disk device 1 according to the embodiment of the present invention)
The operation of the disk device 1 according to the embodiment of the present invention is the same as that described for the conventional disk device 50. That is, the disk detection arm 51, the shaft 53, the roller 54, the trigger lever 55, and the motor 56 in the description of the operation of the conventional disk device 50 are the same as the disk detection arm 2, the shaft 4, the roller 5, the trigger lever 6, Each corresponds to the motor 7. Therefore, the description of the operation related to each of these parts is omitted, and the operation of the plate spring 3 different from the rib 52 of the disk device 50 will be mainly described.

  When a roller 5 is moved in a direction indicated by an arrow in FIG. 3 by driving a motor 7 to a part of a member forming the disk detection arm 2, a plate spring is used as a protruding portion that contacts the roller 5 with elasticity. 3 is provided. 4 and 5 are perspective views of the disk detection arm 2 and the plate springs 3 and 3A. The plate springs 3 and 3A can be formed integrally with a part of a member forming the disk detection arm 2 as a plate-like protrusion when the disk detection arm 2 is formed using a mold or the like. .

  Further, when a conventional mold is used, the plate springs 3 and 3A can be formed by performing simple processing on the members of the disk detection arm 2. For example, a rectangular cut is made in a part of the member forming the disk detection arm 2. The plate springs 3 and 3A can be formed by applying a warp to the members inside the rectangular cuts while applying heat.

  When the plate spring 3 is formed, only the base portion between the plate spring 3 and the disk detection arm 2 needs to be warped. Further, when the plate-like spring 3A is formed, the plate-like spring 3A is formed by warping it in a circular shape while applying heat to the entire member inside the rectangular cut. In the following description, only the plate spring 3 will be described, but the plate spring 3A is also included.

  FIG. 6 is a view of the state of FIG. 1 as viewed from above. FIG. 7 is a view of the state of FIG. 3 as viewed from above. FIG. 8 is a view of the state of FIGS. 3 and 7 as viewed from the insertion direction of the disk 7. As shown in FIG. 8, when the roller 5 moves in the direction of the disc detection arm 2 (in the direction of the arrow), the roller 5 and the plate spring 3 provided on the disc detection arm 2 are in contact with each other. . Thereby, the disc detection arm 2 is fixed (pressed downward from above) by the pressure of the plate spring 3.

(A practical configuration diagram of the disk device 1)
Next, the actual configuration of the disk device 1 will be described with reference to FIGS. FIG. 9 is a perspective view of the disk device 1. FIG. 10 is a diagram illustrating a state when the disk 8 is transported in the disk device 1. FIG. 11 is a diagram showing a state in which the disk 8 has been transported in the disk device 1 (or a state during reproduction of the disk 8). Comparing FIG. 10 with FIG. 11, it can be seen that the roller 5 that was at the top of the disk detection arm 2 in FIG. 10 has moved to the bottom of the disk detection arm 2 in FIG. 11. At this time, it can be seen that the plate-like spring 3 separated from the roller 5 in FIG. 10 is pushed down by the roller 10 in FIG.

(Effects related to the disk device 1)
Next, effects related to the disk device 1 will be described. The disk device 50 has a structure in which the roller 54 is bent, whereas the disk device 1 has a structure in which the plate spring 3 is bent. That is, in the disk device 50, the disk detection arm 51 is held down via the rib 52 by bending the roller 54. On the other hand, in the disk device 1, the roller 5 simply suppresses one end of the plate spring 3 and suppresses the disk detection arm 2 downward by the bending of the plate spring 3.

  As a result, the load when the roller 5 indirectly restrains the disc detection arm 2 via the plate spring 3 is extremely higher than the load when the roller 54 directly restrains the disc detection arm 51 via the rib 52. Can be small. In addition, it is possible to satisfactorily eliminate rattling occurring in the disk detection arm 51 and the like. Further, the position of the roller 5 may be any position as long as it falls within the movable range of the plate spring 3 shown in FIG. Therefore, the positional accuracy of the roller 5 does not require high accuracy. Further, the driving torque when the motor 7 moves the roller 5 in the direction indicated by the arrow in FIG. 8 is substantially constant as long as it is within the movable range of the plate spring 3. Therefore, even when the position of the roller 5 is deviated, the motor 7 is not overloaded.

  As a result, factors that shorten the life of the motor 7 can be removed, and the design, assembly, adjustment, and management (inventory management, transportation management, etc.) of the disk device 1 can be facilitated.

  Further, the roller 5 is not pressed against the plate spring 3 with an excessive force, and the phenomenon that the roller 5 is deformed can be prevented.

  Further, since the shape of the plate spring 3 is simple, forming it integrally with the formation of the disc detection arm 2 is considered from the field of sheet metal processing (when the disc detection arm 51 is made of metal) or plastic forming technology. And very easy. Further, the plate spring 3 is not processed on the mold itself, and when the plate spring 3 is additionally processed on the disc detection arm 2, the plate spring 3 has a simple shape so that additional processing is performed. Is easy. Thereby, the manufacturing cost and manufacturing time of the disc detection arm 2 having the plate spring 3 can be reduced.

(Modification)
Various modifications can be made to the embodiment of the present invention without departing from the gist thereof. For example, the example in which the disc detection arm 2 has the plate spring 3 has been described, but the present invention is not limited to this. For example, the disc detection arm 2 may be provided with a spiral spring (in this case, the spiral spring is separate) instead of the plate spring 3. Further, the disk detection arm 2 may include a plurality of plate springs 3 or spiral springs.

  At this time, a portion corresponding to the plate spring 3 is formed by attaching a spring member to the disc detection arm 2 instead of forming a spring portion corresponding to the plate spring 3 integrally with the formation of the disc detection arm 2. May be. According to this, a spiral spring etc. can be used easily. Further, according to this, even when the disk detection arm 2 is made of resin, only the spring member can be made of metal or the like. Furthermore, according to this, the effect that the freedom degree of design of a spring member and the freedom degree of material selection becomes high is acquired.

It is a figure explaining the fixing method of the disk detection arm in the disk apparatus concerning embodiment of this invention, and is a figure which shows the principal part structure of the said disk apparatus, and the insertion start state of a disk. It is a figure explaining the fixing method of the disk detection arm in the disk apparatus which concerns on embodiment of this invention, and is a figure which shows the next process of the disk insertion start state shown in FIG. It is a figure explaining the fixing method of the disk detection arm in the disk apparatus concerning embodiment of this invention, and is a figure which shows a disk insertion completion state. FIG. 4 is a perspective view of a disk detection arm and a plate spring shown in FIGS. 1 to 3. FIG. 4 is a perspective view of a disk detection arm and a plate spring shown in FIGS. 1 to 3, and a perspective view showing a plate spring having a shape different from that of FIG. 4. FIG. 2 is a view of the disk insertion start state of FIG. 1 viewed from above the disk device. FIG. 4 is a view of the disk insertion completion state of FIG. 3 viewed from above the disk device. FIG. 8 is a view of the state of the disk detection arm, the roller, and the plate spring in the disk insertion completion state of FIGS. 3 and 7 as viewed from the disk insertion direction. 1 is a practical perspective view of a disk device according to an embodiment of the present invention. FIG. 10 is a diagram showing a state when a disc is transported in the disc device shown in FIG. 9. FIG. 10 is a diagram showing a state at the completion of the conveyance of the disc in the disc apparatus shown in FIG. It is a figure explaining the fixing method of the disk detection arm in the disk apparatus of a prior art example, and is a figure which shows the principal part structure of the said disk apparatus, and the insertion start state of a disk. It is a figure explaining the fixing method of the disk detection arm in the disk apparatus of a prior art example, and is a figure which shows the next process of the disk insertion start state shown in FIG. It is a figure explaining the fixing method of the disk detection arm in the disk apparatus of a prior art example, and is a figure which shows a disk insertion completion state. FIG. 15 is a perspective view of a disc detection arm and a rib shown in FIGS. 12 to 14. It is the figure which looked at the disk insertion start state of FIG. 12 from the disk apparatus top. It is the figure which looked at the disk insertion completion state of FIG. 14 from the disk apparatus top. FIG. 18 is a diagram of the state of the disk detection arm, the roller, and the rib in the disk insertion completion state of FIGS. 14 and 17 as viewed from the disk insertion direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Disc apparatus, 2 ... Disc detection arm, 3, 3A ... Plate spring (protrusion part), 4 ... Axis, 5 ... Roller, 6 ... Trigger lever, 7 ... Motor (means to move), 8 ... Disc

Claims (3)

A roller that contacts the disk surface and conveys the disk by rotational movement;
A disc detection arm that contacts the edge of the disc and rotates as the disc is conveyed;
Means for separating the roller from the disk surface and moving it toward the disk detection arm when the conveyance of the disk is completed;
In a disk device comprising:
A part of the disc detection arm is provided with a protruding portion that elastically contacts the roller when the moving means moves the roller.
A disk device characterized by the above. The disk device according to claim 1,
The protrusion is a plate-shaped spring.
A disk device characterized by the above. In the method of forming a disk detection arm that contacts the edge of the disk and rotates as the disk is conveyed,
A part of the member forming the disk detection arm is formed as a plate-like spring.
A method for forming a disc detection arm.