JP2002304875A - Driving mechanism, and information recording and reproducing device using this - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving mechanism of which push-in force at the time of insertion of a recording medium is light and discharge force at the time of discharge is sufficient and an information recording and reproducing device using this driving mechanism. SOLUTION: A driving mechanism 10 storing and discharging a recording medium 12 by driving a carrier member 11 on which the recording medium 12 is placed, the mechanism is provided with an arm 20 provided being freely rotatable and connected to the carrier member 11, a lever 30 which is freely rotatable for the arm 30, of which a tip part 32 is attached so as to forward a rotation shaft 21 side of the arm 20, and which receives energy from a spring 36, and a gear 40 and a locking projection 41 which contacts to the lever 30, for which a contact point is positioned at the tip part 32 side being away from a rotation fulcrum of the lever 30 in an initial state at the time of storing of the carrier member 11, positioned at a closing side for the rotation fulcrum of the lever 30 in an initial state of discharging of the carrier member 11, and of which a contact point contacting to the lever 30 is varied as progress of driving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive mechanism for transporting a recording medium such as an MD used for an audio device or the like to the inside of an audio device or the like by a transport member, and an information recording / reproducing device using the same About.

[0002]

2. Description of the Related Art There is an information recording / reproducing apparatus for recording / reproducing information by inserting / ejecting a recording medium such as an MD, C cassette, or VCR into / from a recording / reproducing apparatus. Such an information recording / reproducing apparatus generally has a drive mechanism operated by a motor, an artificial force, or the like, and the recording medium is ejected / inserted by the drive mechanism.

As shown in FIG. 7, a driving mechanism 100 includes
Some include an arm 101, a lever 102, and a gear 103, and the arm 101 and the transport member 104 are linked. In this configuration, the arm 101 and the lever 102 are rotatably mounted around the same rotation shaft 105 as a rotation fulcrum.

A rotating shaft 1 is provided between the arm 101 and the lever 102 so that the spring 106 applies a biasing force to each other.
05. The spring 106 has a protruding piece 107 protruding from a side piece of the arm 101.
One end side is in contact. The other end of the spring 106 contacts the side piece of the lever 102 so that the arm 10
It is bent so as to project toward the lever 102 from a position between the lever 1 and the lever 102. With such a configuration, the spring 106 is configured to exert an urging force between the arm 101 and the lever 102.

[0005] The arm 101 is a long plate member.
A fan-shaped plate-like member lever 102 is provided on the arm 101. The lever 102 has a first elongated hole 108 on a straight line on the same radius from the rotation shaft 105.
Are formed. The first slot 108 has an arm 10
A stopper 109 projecting from 1 is slidably fitted. Thus, the arm 101 and the lever 102 are integrated without coming off from each other.

The lever 102 has a second long hole 11.
0 is formed. The second elongated hole 110 is provided substantially along the radial direction of the fan-shaped lever 102, and the shape of the second elongated hole 110 is arc-shaped. The projection 111 formed on the gear 103 is fitted into the second elongated hole 110. Here, the gear 103
As shown in FIG. 7 (a), it is rotatably attached to the rotation fulcrum 112, and has a configuration in which a rotational driving force is externally applied by meshing. The gear 103 is also a modified gear whose outer shape is substantially fan-shaped.

A guide projection 11 is provided at the tip of the arm 101.
3 are protrudingly formed. The guide protrusion 113 is formed so as to protrude toward the substrate side opposite to the direction in which the above-described stopper 109 protrudes, and is engaged with the slide groove 114 of the transport member 104. Slide groove 114
Is provided on the back side of the transport member 104, and is formed along a direction orthogonal to the moving direction (arrow W) of the transport member 104.

[0008] The driving mechanism 100 having the above-described structure is used for the M
It is provided in an audio device that reproduces D or the like. When the recording medium 120 such as an MD is inserted, the recording medium 120 is positioned on the transport member 104. When the recording medium 120 is further pushed in, the transport member 104 is pushed into the audio device (in the direction of arrow W). Then, along with this pushing, the arm 101 also turns in the arrow V direction about the turning shaft 105 as a fulcrum.

Further, by the rotation of the arm 101, the lever 102 integrated with the arm 101 is also rotated in the direction indicated by the arrow V while exerting an urging force on the arm 101. Lever 1
02 rotates, the second slot 11 of the lever 102
The protrusion 111 fitted in the zero is also pushed. As a result, the gear 103 rotates in the direction indicated by the arrow T. When the gear 103 rotates, the protrusion 111
Slide along.

In this case, the projection 111 initially located at a predetermined position of the second elongated hole 110 moves radially outward of the lever 101. When the arm 101 is still pushed in even after passing through the point A on the outermost diameter side, the gear 103 rotates further, and the rotation causes the protrusion 111 to move inward in the radial direction of the lever 102. I do. In addition,
The gear 103 is connected to a drive source such as a motor (not shown). Therefore, when the gear 103 is pushed and rotated, a certain drag is generated. This drag acts on the contact point between the projection 111 and the second elongated hole 110. Hereinafter, this point is called an action point.

When the recording medium 120 is ejected by a driving source such as a motor, the gear 103 is rotated in a direction opposite to the arrow T direction by a driving source such as a motor.
An operation opposite to the above-described operation is performed.

When the recording medium 120 is inserted, an operation start switch such as a motor for driving the gear 103 by inserting the recording medium 120 by a predetermined amount is turned on. Then, the driving source causes the gear 103 to move as indicated by the arrow T.
The lever 102 rotates in the direction indicated by the arrow V. Thereby, a configuration is adopted in which the transporting member 104 transports in the arrow W direction.

[0013]

By the way, the lever 10
2 and the arm 101, a substantially constant torque is applied to the lever 102 and the arm 1 by the urging force of the spring 106.
01. The reference point on which the torque acts is the rotating shaft 105 on which the spring 106 is provided.

In the insertion direction, the lever 102 and the arm 101
As a result, the driving force of the gear 103 is transmitted to the arm 101 integrally with the stopper 109 and the end of the slot 108. In the discharge direction, the lever 102 and the arm 101
The projection 111 of the gear 103 for rotating the
Of the gear 103
Is sufficiently larger than the urging force of the spring 106, so that even if the contact position (driving point) between the projection 111 and the lever 102 changes, the repulsive force (discharge force) of the arm 101 is reduced by the urging force of the spring 106. Depends on

In this case, the greater the discharging force of the recording medium 120, the more reliably the recording medium 120 can be discharged without losing the load during discharge. Therefore, the larger the load of the spring 106 is, the better.

However, when the spring load is increased,
Although sufficient ejection force can be obtained, the force required when the recording medium 120 is inserted increases accordingly. Therefore, the user feels that the recording medium 120 is difficult to insert.

In view of the above, there is a demand for a drive mechanism that can obtain a sufficient ejection force without much ejection force when the recording medium 120 is inserted.

The present invention has been made in view of the above circumstances. It is an object of the present invention to reduce the pushing force required when inserting a recording medium, but to take sufficient ejection force generated when ejecting a recording medium. And an information recording / reproducing apparatus using the driving mechanism.

[0019]

In order to achieve the above-mentioned object, a driving mechanism of the present invention drives a conveying member on which a recording medium is mounted, and includes a rotating mechanism for storing and discharging the conveying member. A first rotating member that is movably provided and connected to the conveying member so as to slide the conveying member, and is rotatably attached to the first rotating member; A second rotating member receiving an urging force from an urging means attached to the first rotating member, and abutting against the second rotating member and a contact point with the second rotating member A contact rotating means which fluctuates as the driving progresses, and a first rotating member generated by a force acting between the second rotating member and the contact varying driving means when the conveying member is pushed in. Rotation torque is smaller than when the conveying member is discharged. Contact point change driving means so that in which is located.

For this reason, when the recording medium is inserted, the first rotating member is pushed, and the second rotating member is also pushed by the first contact member. Between them. In this case, the urging force is such that the rotation torque generated in the first rotation member as described above is
It is set to be smaller than when the recording medium is ejected. Thereby, the user feels that the resistance at the time of inserting the recording medium is small, and it becomes easy to insert the recording medium. As described above, when the resistance at the time of inserting the recording medium is small, by repeatedly inserting the recording medium, the load generated at various places such as the recording medium can be reduced, thereby improving the product life of the various places such as the recording medium. It is possible to do.

Further, when the drive mechanism ejects the recording medium, the rotational torque generated in the first rotating member becomes larger than that when the recording medium is inserted. As a result, a sufficient discharging force is applied to discharge the recording medium, and the recording medium can be discharged properly.

A driving mechanism according to another aspect of the present invention is a driving mechanism for driving a conveying member on which a recording medium is mounted, and storing and discharging the conveying member. A first rotating member connected to the transport member so as to slide the first rotating member; A second rotating member attached to the fulcrum side and receiving an urging force from the urging means attached to the first rotating member, and abutting against the second rotating member; At the same time, the contact point for the second rotating member is located on the distal end side separated from the rotating fulcrum of the second rotating member in the initial state when the transport member is stored, and the discharging of the transport member is performed. In the initial state at the time, it is located on the side close to the rotation fulcrum of the second rotation member. It has been one in which further second contact point contacting the rotating member is provided with a contact point fluctuation drive means that varies with the progress of the drive.

For this reason, the second pivoting member is attached to the pivoting fulcrum of the first pivoting member with its tip facing. Further, in the initial state when the transport member is stored, the contact point is located on the distal end side away from the pivot point of the second pivot member. For this reason, when the contact changing drive unit contacts the second rotating member, the contact is separated from the rotation fulcrum of the second rotating member when the contact is inserted (during storage). Thereby, even if the second rotating member receives the biasing force from the biasing means, it is possible to reduce the force generated at the contact point between the second rotating member and the contact point varying driving means. Becomes

The second pivoting member is attached with the tip of the second pivoting member facing the pivoting point of the first pivoting member. Further, when the recording medium is inserted, the pivoting pivot of the second pivoting member is provided. Since the contact point is located on the distal end side away from the contact point, the contact point approaches the turning fulcrum of the first turning member by that amount. As a result, a smaller rotational torque is generated in the first rotating member than when the recording medium is ejected. As a result, the urging member exerts an urging force when the first rotating member pushes the conveying member (recording medium), and it is possible to reduce the pushing force exerted on the user as a reaction force.
Thereby, the user feels that the resistance when inserting the recording medium is small, and it becomes easy to insert the recording medium.

When the recording medium is ejected, the opposite is true, and when the transport member (recording medium) is ejected, the rotation of the second rotation member is relatively close to the rotation fulcrum. Since the contact point is located on the fulcrum side, the contact point is separated from the pivot point of the first pivot member by that much. As a result, as compared with the time when the recording medium is inserted, the rotation torque generated in the first rotating member increases, and it becomes possible to give a sufficient discharge force to discharge the recording medium,
The recording medium can be discharged well.

In another aspect of the present invention, in addition to the above-mentioned inventions, the contact-contact varying driving means further comprises a locking projection formed on a rotatable gear member. Therefore, when the gear member rotates, the contact point at which the locking projection contacts the second rotating member moves with this rotation. As a result, the pushing force on the recording medium is small at the beginning of the insertion of the recording medium, but when the rotation of the gear member is started, the force required for pushing the recording medium gradually increases. However, once the rotation of the gear member is started, the recording medium is automatically stored even if the user's hand is released. As a result, only the impression that the user needs to initially press the recording medium is left.

On the other hand, when the recording medium is discharged, a large discharging force for initially discharging the recording medium can be obtained by the reverse rotation of the gear member. As the recording medium is ejected, the ejection force for ejecting the recording medium becomes weaker. However, in general, when the recording medium is ejected, the exposure and opening / closing operations of the recording unit are performed inside the apparatus. Therefore, when the recording medium is inside the apparatus, the operation load is large, and the discharging power is most required. Also, if the recording medium has been ejected from the inside of the device and has protruded enough,
Even if the ejection force at the final stage of ejection is weak, the user can pull out the recording medium by hand or the like, and there is little hindrance to the operation. In other words, the configuration is such that the ejection force of the recording medium inside the audio device or the like, which is the most important, can be sufficiently secured.

According to another aspect of the present invention, in addition to the above-described aspects, the second rotating member is a torsion spring that generates an urging force about a pivot point. For this reason, it becomes the structure which unified the urging means and the 2nd rotation member, and it is possible to obtain the same operation and effect as the above-mentioned invention of the drive mechanism while having a simple structure with a small number of parts. Become.

According to still another aspect of the present invention, in addition to the above-mentioned inventions, the contact point variation driving means further comprises an engaging projection formed on a slide member slidable in the sliding direction. The sliding direction is provided so as to form an acute angle with the direction connecting the rotation fulcrum of the second rotation member and the tip.

Even in the case of such a configuration, it is possible to obtain the same operation and effect as those described above. That is, when the recording medium is inserted, the locking projection comes into contact with the tip of the second rotating member. Then, when the slide drive of the slide member is started, the contact point gradually moves to the rotation fulcrum side of the second rotation member, and accordingly, the force acting on the contact point increases. However, also in this case, once the slide drive of the slide member is started, the recording medium is automatically stored even if the user's hand is released. As a result, only the impression that the user needs to initially press the recording medium is left.

Conversely, when the recording medium is ejected, the sliding force of the slide member in the opposite direction can increase the ejection force for initially ejecting the recording medium. The discharge power becomes weak. However, for example, when the recording medium is sufficiently ejected from the inside of the audio device by ejection, the user can pull out the recording medium by hand or the like even if the ejection force in the final stage is weak. In other words, the configuration is such that the ejection force of the recording medium inside the audio device or the like, which is the most important, can be sufficiently secured.

According to another aspect of the present invention, in addition to the above-mentioned inventions, the first pivoting member is provided near the attachment position of the second pivoting member and at a position closer to the pivot point than the attachment position. A second size member is formed to have a predetermined size, and the second turning member is positioned so as to reach the second portion. The locking projection can be positioned in the sliding gap existing in the above.

For this reason, the locking projection is positioned and sandwiched in the sliding gap. As a result, when the locking projection collides with the side edge of the punch-out portion and the transport member (recording medium) is stored,
When the gear member and the slide member are driven and the locking projection continues to push the side edge, the first rotating member is directly connected to a driving source such as a motor. That is, by providing a punching portion and locking the locking projection to the side edge of the pulling portion, once the gear member or the slide member is driven, the first rotary member rotates together with this drive, By the rotation, the recording medium can be stored well.

Conversely, when the recording medium is ejected, when the gear member or the slide member is driven, the locking projection continues to push the second rotating member. In this case, the first rotating member is kept pressed through the urging means, and the discharging force at the time of discharging is large, so that the recording medium can be discharged satisfactorily.

According to still another aspect of the present invention, in addition to the above-described invention, a stopper receiving portion for restricting a turning direction and a turning position of the second turning member is provided on the first turning member. Is formed, and a stopper portion is formed on the second rotating member so as to be engaged with the stopper receiving portion. The stopper is engaged so as not to be narrowed, and the rotation of the second rotating member is regulated.

For this reason, by receiving the stopper portion with the stopper receiving portion, it is possible to prevent the sliding gap from being narrowed to a predetermined distance or less. That is, the urging means is connected to the second rotating member, and the urging means applies an urging force to the second rotating member in a direction to narrow the sliding gap. However, the presence of the stopper receiving portion and the stopper portion received by the stopper prevents the sliding gap from being narrowed.
Accordingly, it is possible to prevent the locking projection existing in the sliding gap from being caught by the side edge of the punched-out portion and the second rotating member, and from becoming immobile. That is, the locking projection can be moved satisfactorily, and it is possible to prevent the gear member and the slide member from stopping halfway, and the storing operation and the discharging operation of the recording medium from stopping halfway.

According to another aspect of the present invention, in addition to the above-described aspects, the urging means is further attached to the second pivot member on the pivot point side. For this reason, even if the second rotating member rotates, a change in the distance due to the rotation can be relatively small. Thereby, the variation of the torque generated in the second rotating member is small, and the variation of the torque is small, so that the contact point moves along the second rotating member,
The force generated at the contact can be varied. In some cases, it can be considered that a substantially constant torque is generated in the second rotating member.

Further, in another invention, in addition to the above-mentioned inventions, the urging means is attached to an auxiliary rotating member which rotates in conjunction with the rotation of the second rotating member. A long groove is formed in the second turning member along a direction connecting the turning fulcrum of the second turning member and the tip, and a protruding pin formed on the auxiliary turning member has a long groove formed therein. The second rotating member and the auxiliary rotating member are slidably positioned so as to be interlocked.

With this arrangement, when the first rotating member is pushed in a state in which the contact rotating device is in contact with the auxiliary rotating member, the auxiliary rotating member is correspondingly pressed by the urging means. It is possible to rotate while resisting the urging force.
However, for example, when the contact rotating means is in contact with the second rotating member when the recording medium is ejected, even if the second rotating member attempts to rotate, A force is applied from the protruding pin in a direction along the moving direction of the long groove accompanying the rotation, and this movement is restricted. In addition, since the auxiliary rotating member is also connected to the urging means, the projecting pin is configured to be difficult to move. in this way,
The rotation of the second rotation member is hindered by the presence of the protruding pin. Therefore, for example, when the recording medium is ejected, the first rotating member is directly connected to the contact-contact variable driving means such as a gear member, and the first rotating member does not rotate. The turning member can be turned.

According to another aspect of the present invention, an information recording / reproducing apparatus is provided using the above-described driving mechanism. With this configuration, as described above, an information recording / reproducing apparatus that can insert a recording medium with a resistance that is not so large and that can obtain a sufficient ejection force when ejecting the recording medium is provided. Becomes possible.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing a configuration of a drive mechanism 10 of an audio device in the information recording / reproducing device of the present invention. As shown in this figure, the drive mechanism 10 has a transport member 11. The transport member 11 has a recording medium 12, such as an MD, placed thereon, and slides inside to carry the recording medium 12 to a reproduction position (not shown) and conversely, discharges the recording medium 12 from the reproduction position.

The transport member 11 has a rectangular shape equivalent to that of the recording medium 12 in order to accommodate the placement of the recording medium 12. Further, a slide groove 13 is provided on the back side of the transport member 11 (on the side where the arm 20 described later is provided). A guide protrusion 22 to be described later is engaged with the slide groove 13. Thereby, this slide groove 1
The guide projection 22 is slidable along 3.

The conveying member 11 includes an arm 20 as a first rotating member, and a gear 40 as a contact-contact varying driving means.
Is slid along with the rotation of. Of these, arm 20
As shown in FIG. 2, the plane shape is substantially a crescent shape, and one end side of the rotating shaft 21 is attached to one end side of the crescent shape. This rotating shaft 21 is
0 is protruded from the back surface (the surface on which the gear 40 is provided in FIG. 1).

The other end of the rotating shaft 21 is attached to a substrate (not shown). Thereby, the arm 20 rotates around the rotation shaft 21.
A guide protrusion 22 is formed on the other end of the crescent shape so as to project toward a substrate (not shown) similar to the above-described rotating shaft 21. Then, as described above, the substrate side of the guide protrusion 22 is engaged with the slide groove 13.

When the arm 20 rotates in this manner, the guide projection 22 also makes an arc movement, and the movement in the Y direction in FIG. As a result, the transport member 11 can move in the X direction.

The arm 20 has a cut-out portion 23 formed by cutting a central portion by a predetermined amount. Pull-out part 2
A guide edge 24 is provided at the edge of the third. The guide edge portion 24 is formed in an arc shape in order to slide the locking projection 41 of the gear 40 described later satisfactorily, and is formed linearly from the arc end point. In addition, since the locking projection 41 also moves in the width direction of the punched portion 23,
The punched portion 23 is formed to have a predetermined width which is sufficient in the width direction.

A lever 30 is attached to the arm 20 via a pivot pin 31 so as to be rotatable with respect to the back surface of the arm 20 so that the lever 30 can reach the pull-out portion 23. As shown in FIG. 1 and FIG.
The distal end portion 32 on the side opposite to the side on which the rotation pin 31 is attached is formed in an arc shape so as to follow the arc-shaped guide edge portion 24 described above. When the stopper portion 34 is in the locked state, a predetermined sliding gap 33 is formed between the arc-shaped tip portion 32 and the above-described guide edge portion 24.

As shown in FIG. 2A, the stopper portion 34 is formed on a side piece of the lever 30 opposite to the distal end portion 32 in a direction protruding upward in FIG. . The stopper portion 34 is erected from the upper surface of the lever 30 toward the arm 20 so as not to interfere with the arm 20. In addition, corresponding to the stopper portion 34, the stopper receiving portion 25 is provided on a side edge of the punching portion 23 facing the guide edge portion 24 so as not to interfere with the lever 30 toward the lever 30. It is erected only for the length.

The stopper receiving portion 25 receives the stopper portion 34, whereby the rotation of the lever 30 is restricted. The stopper receiving portion 25 is configured to be located closer to the sliding gap 33 than the stopper portion 34. This restricts the lever 30 from narrowing the sliding gap 33 to a predetermined distance or less, and is configured to be rotatable in a direction in which the sliding gap 33 is widened from that position.

A spring locking portion 35 is formed upright at a predetermined position of the lever 30 closer to the rotation pin 31 than the tip portion 32. One end of a spring 36 as an urging means is bridged between the spring locking portions 35. Spring locking part 3
As shown in FIG. 2A, 5 is formed on the side of the lever 30 that is slightly closer to the pivot pin 31 than the distal end portion 32 side.

The other end of the spring 36 is hooked on the spring receiving portion 26 of the arm 20 as shown in FIG. The spring receiving portion 26 is formed at a predetermined position on the side of the arm 20 opposite to the side on which the rotation pin 31 is provided, as viewed from the spring locking portion 35. For example, when the lever 30 rotates counterclockwise in FIG. 2, the spring 36 expands, whereby the spring 36 has a pulling force opposite to the rotation direction of the lever 30.

A predetermined range of the arm 20 from the position where the spring receiving portion 26 is formed is recessed toward the gear 40 from other portions of the arm 20 and has a height substantially flush with the lever 30. Is formed. Thereby, the protruding height of the spring locking portion 35 and the spring receiving portion 26 is reduced.

Below the arm 20 having the above-mentioned lever 30 (substrate side), a gear 40 is provided so as to overlap. As shown in FIGS. 1 and 2, the gear 40 has a locking projection 41 protruding toward the upper surface side (arm 20 side) of the circular plate-shaped member. The locking projection 41 is formed on a radially outer side of the upper surface of the gear 40.

The locking projection 41 enters the sliding gap 33 described above. When the locking projection 41 enters the sliding gap 33, the guide edge 24 and the side piece of the lever 30 are provided. It is formed to a height that will cause it to hit.
Therefore, when the gear 40 rotates, the rotation of the gear 40 is transmitted to the arm 20 and the lever 30 via the locking projection 41, and the arm 20 and the lever 30 are rotated.

The gear 40 is directly connected to a drive source such as a motor (not shown). The drive source is configured to operate by a switching operation of an operation start switch (not shown). The operation changeover switch is provided, for example, at an intermediate portion where the transport member 11 slides, or at an intermediate portion of the rotation operation of the arm 20. Then, when the transport member 11 slides or the arm 20 rotates, the operation changeover switch is switched with these operations.

The operation of the drive mechanism 10 of the audio device having the above configuration will be described below. First, the loading operation of the transport member 11 will be described. In this case, a recording medium 12 such as an MD is placed on the transport member 11 and
Thereafter, the conveying member 11 is pushed by hand or the like in the direction X2 in which the conveying member 11 is pushed inward in the X direction. Then, the arm 20 rotates in the direction indicated by the arrow M with the pushing operation. Further, when the arm 20 rotates, the lever 30 also tries to rotate with this, but at this stage, the gear 40 is still rotating.
Since the lever 30 is not in a rotatable state, the lever 30 is
1 and rotates counterclockwise in FIG. 2 around the rotation pin 31.

By turning the lever 30 as described above, the arm 20 can turn in the direction of arrow M without any support. Further, when the arm 20 rotates, an operation start switch (not shown) is
The arm 20 and the transfer member 11 are pushed in. Thereby, a drive source such as a motor (not shown) is driven, and the gear 40 directly connected to this drive source rotates in the direction of arrow Z in FIG. Due to the rotation of the gear 40, the arm 20 also moves to the arrow M.
The arm 20 continues to rotate in the direction, and finally the arm 20 rotates to the abutting position of the rotation of the arm 20 or the abutting position of the transport member 11. In addition, the transport member 11 that is interlocked with the arm 20 is also drawn into the back side.

Further, the gear 40 continues to rotate, and the sliding gap 33
Then, the locking projection 41 comes out from the state, and the locking projection 41 does not come into contact with the lever 30, so that the rotation of the arm 20 ends. However, the gear 40 continues to rotate by further driving of the driving source. The drive of the drive source drives guides, actuators, and the like (not shown), and the recording medium 12 is moved in the normal direction of the recording medium 12 (X2 direction). Then, the recording medium 12 moves to the reproduction standby position.

In this case, the transfer member 11 and the arm 2
0 is pressed and held by the above-described guide or the like, and the driving of the above-described driving source is completed. At this time, the locking projection 41 extends below the arm 20, and the lever 30 comes into contact with and is held against the pulling force of the spring 36. Here, the drive source terminates the drive operation of the drive source by rotating the arm 20, moving the transport member 11, and detecting the position of the recording medium 12 with a loading completion switch (not shown).

As for the discharging operation of the transport member 11, an operation completely opposite to the above-described operation of loading the transport member 11 is performed. That is, the gear 40 rotates in the direction opposite to the arrow Z shown in FIG.
Also rotates in a direction completely opposite to the above-described rotation direction. As a result, the transport member 11 is driven in the direction of arrow X1 in the figure, and the transport member 11 is ejected to the near side of the audio device.

Here, when the recording medium 12 is inserted, the position of the locking projection 41 in the rotation direction is the position where the previous ejection of the recording medium 12 is completed, and is present in the gear 40 in the initial insertion state. The locking projection 41 is located at the position shown in FIG. Then, when the recording medium 12 is inserted into the inside from this state, in the middle of the process, FIG.
The state shown in FIG. Even in this state, the gear 4
0 is in the initial insertion state without rotating. At this time, lever 3
Although the load that 0 receives from the spring 36 is F, the amount of change in F is not so large because the spring 36 is in an expanded state from the beginning, and even when the arm 20 and the lever 30 rotate, F is regarded as the same. Good.

However, as the amount of rotation of the lever 30 increases, the size of F also changes accordingly. This will be described later.

The lever 3 urged by the spring 36
When the distance from the center of the rotation pin 31 is r regardless of the position of the arm 20 or the locking protrusion 41, the rotation torque of 0 is represented by T = F * r (1) .

The lever 30 receives a torque T from the locking projection 41. Here, the position of the locking projection 41 immediately before the gear 40 starts rotating by the drive source is defined as a point A. At this time, the distance from the rotation pin 31 to the locking projection 41 located at the point A is α1, and the force received by the lever 30 from the locking projection 41 is W1. At this time, the rotation torque by F given by the spring 36 is represented by T = W1 * α1 (2).

At this time, the load P 1 (feeding force) applied to the arm 20 when the recording medium 12 is inserted is
L1 * W1 = P1 * H P1 = L1 * W1 / H (3)

From (1) and (2), F * r = W1 * α1 W1 = F * r / α1 Further, from (3) and (4), P1 = L1 * r * Fx / (H *) α1) (5) where Fx is the load of the spring 36 at the time of use.

Therefore, the force (insertion force) required for the user to insert the recording medium 12 is determined by the above equation (5). At this time, as the rotation angle of the lever 30 increases and decreases in proportion to the amount of pushing of the recording medium 12, Fx also increases and decreases, and F0 to Fmax change.

Next, in consideration of the discharging operation, FIG.
As shown in FIG.
When 0 rotates clockwise to perform the discharging operation, the locking projection 41 rubs the side piece of the lever 30 with this rotation. Then, the distance αx from the rotation pin 31 to the locking projection 41
(Not shown) also changes in a decreasing direction. At this time, if the distance from the pivot pin 31 to the locking projection 41 located at the point B is α2, T = W2 * α2 holds.

At this time, when the recording medium 12 is ejected,
The load P2 (discharge force) acting on the arm 20 is as follows: L2 * W2 = P2 * H P2 = L2 * W2 / H (6)

From the above (1) and (2), P2 = L2 * r * Fx / (H * α2) (7) where H = const, r = const (8) L2> L1 , Α2 <α1, ∴L2 / α2 >> L2 /
α2… (9)

As described above, from (6) to (9), P1 >> P2, and P2 is the rotation fulcrum 3 of the locking projection 41 and the lever 30.
When the distance α with respect to the point 1 is minimum, the load becomes maximum near the point B. Note that, in the description here, the line connecting the fulcrum and the point of action and the direction of the load are not taken into account (the torque is obtained by multiplying the line connecting the fulcrum and the point of action by the force of a right angle component) Even if the direction of the force changes in the operating range, equation (9) always holds, so there is no problem.

Accordingly, when the locking projection 41 is located at the point A when the recording medium 12 is inserted, the recording medium 1
The force received when the locking projection 41 is located at the point B at the time of ejection of No. 2 is smaller. That is, since the drive mechanism 10 employs the above-described configuration, the recording medium 12 (the conveying member 1) required when the recording medium 12 is inserted.
The pushing force of 1) is applied to the arm 2 when the recording medium 12 is ejected.
0 can be made smaller than the discharge force exerted on the conveying member 11.

Further, from the above results, even if it is calculated that the spring force F changes due to, for example, simple adjustment of the extension of the spring 36, the locking projection 41 at the time of insertion of the recording medium 12 becomes A It is possible to reduce the force generated on the arm 20 when the recording medium 12 is ejected at the point 20 than when the locking projection 41 is located at the point B when the recording medium 12 is ejected. . That is, since the driving mechanism 10 employs the above-described configuration, the pushing force of the recording medium 12 (the transport member 11) required when the recording medium 12 is inserted, and the arm 20 when the recording medium 12 is ejected, Can be reduced as compared to the discharge force exerted on the surface.

According to the drive mechanism 10 of the audio device having such a configuration, the lever 30 is attached with the distal end portion 32 facing the rotation fulcrum of the arm 20.
Furthermore, in the initial state when the transport member 11 is stored,
The contact point is located on the side of the distal end 32 away from the pivot point of the lever 30. Therefore, the locking projection 41 is
When it comes into contact with 0, the point A, which is the contact point, is separated from the pivot point of the lever 30 at the time of insertion (at the time of storage).

Here, even if the lever 30 receives the spring force F from the spring 36, the rotational torque generated on the lever 30 by the spring force F is the same at the point A. For this reason,
The force W1 acting on the point A can be reduced.

Further, the lever 30 is provided at the pivot of the arm 30.
Is attached with the tip 32 of the head facing. In addition, when the recording medium 12 is inserted, the lever 30 is moved closer than the contact point (the representative point B) when the recording medium 12 is ejected.
A which is a contact point on the side of the distal end portion 32 away from the pivot point of
The point is located. Therefore, the point A comes closer to the rotation shaft 21 of the arm 20 than the point B.

As a result, the rotational torque generated on the arm 20 can be smaller than when the recording medium 12 is ejected. Thereby, the arm 20 is moved to the transport member 11 (recording medium 12).
As a result, the spring 36 exerts a biasing force, and the pushing force P1 exerted on the user as a reaction force can be reduced. Thereby, the user feels that the resistance when inserting the recording medium 12 is small, and it becomes easy to insert the recording medium.

Further, if the resistance at the time of inserting the recording medium 12 is small, the load generated at various places such as the recording medium 12 can be reduced by repeatedly inserting the recording medium 12. For this reason, it is possible to improve the product life of each part such as the recording medium 12.

When the recording medium 12 is ejected,
The exact opposite can be said. That is, the transport member 11
When the (recording medium 12) is ejected, the point B, which is the contact point, is located relatively close to the rotation pin 31 that is the rotation fulcrum of the lever 30. Therefore, the point B, which is a contact point, is more distant from the rotation shaft 21, which is a rotation fulcrum of the arm 20, than when the recording medium 12 whose point A is the contact point is inserted. As a result, the rotational torque generated in the arm 20 becomes larger than when the recording medium 12 is inserted, and it is possible to give a sufficient discharge force P2 for discharging the recording medium 12. Therefore, it is possible to discharge the recording medium 12 satisfactorily, and it is possible to prevent a problem that the discharging force is insufficient and the arm 20 stops halfway.

That is, in an audio device or the like,
The load applied to the recording medium 12 inside the apparatus, such as the exposure of the recording unit (disk surface) and the opening / closing operation, is large, and the discharging force is most necessary and important. Further, even if the ejection force in the state where the recording medium 12 is sufficiently ejected is slightly weak, the user can pull it out by hand or the like. Therefore, it can be said that the recording medium 12 can be reliably discharged.

The arm 20 has a cut-out portion 23, and a lever 30 is rotatably mounted so as to reach the cut-out portion 23. Therefore, a sliding gap 33 is formed between the guide edge 24 and the lever 30, and the locking projection 41 is positioned and sandwiched in the sliding gap 33.

Thus, the conveying member 11 (recording medium 1)
When storing 2), the locking projection 41 is
4, and in this state, the locking projection 41 is
Keeps the arm 20 directly connected to a driving source such as a motor (not shown). For this reason, after the operation start switch (not shown) is switched and the drive source is driven, it is possible to satisfactorily store the recording medium 12 by pushing the locking projection 41.

Conversely, when the recording medium 12 is ejected, the locking projection 41 keeps pushing the lever 30 when the gear 40 is driven. In this case, the arm 20 is pushed through the spring force of the spring 36. However, since the ejection force of the arm 20 at the beginning of ejection received by the spring 36 is large, even in a position where the load on the recording medium 12 inside the apparatus is large, The arm 20 rotates well, and the ejection of the recording medium 12 can be performed satisfactorily.

Further, the arm 20 and the lever 30
A stopper receiving portion 25 and a stopper portion 34 are provided, respectively. For this reason, the stopper portion 3
4, the rotation of the lever 30 with respect to the arm 20 is restricted, and it is possible to prevent the gap of the sliding gap 33 from being narrowed below a predetermined interval. That is, a spring 36 is connected to the lever 30, and an urging force is applied by the spring 36 in a direction to narrow the sliding gap 33.

However, the above-described stopper receiving portion 2
Since the stopper 5 and the stopper 34 are provided so as to engage with each other, it is possible to prevent the sliding gap 33 from being narrowed below a predetermined interval. Thereby, the sliding gap 33
When the locking projection 41 is present on the guide edge, the locking projection 41 is prevented from being caught between the guide edge 24 and the tip end portion 32 and cannot be moved, so that the locking projection 41 can be moved satisfactorily. Become. In this manner, the satisfactorily movement of the locking projection 41 can prevent the gear 40 from stopping halfway and stopping the storing operation and the discharging operation of the recording medium 12 halfway.

By applying the above-described drive mechanism 11 to an audio device, an audio device in which the recording medium 12 can be easily inserted and the user feeling is improved can be provided. Further, since the ejection force of the recording medium 12 can be sufficiently ensured, an audio apparatus capable of reliably ejecting the recording medium 12 can be provided. The drive mechanism 12
Is not limited to audio devices, but can be applied to general information recording / reproducing devices.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and can be variously modified. For example, as in a drive mechanism 50 shown in FIGS. 4A and 4B, a torsion spring 51 may be provided instead of the lever 30. With such a configuration, the spring 36 can be omitted, and the driving mechanism 1 described above can be simplified with a small number of parts and a simple configuration.
Thus, the same operation and effect as those of the invention can be obtained.

Also, as in a driving mechanism 60 shown in FIG.
Instead of the gear 40, a configuration may be used in which a slide member 61 is used as the contact-contact variable driving means. In this case, a locking projection 62 similar to the locking projection 41 of the gear 40 is provided on the slide member 61, and the locking projection 62 comes into contact with the lever 30. Further, the slide member 61 is configured to be provided with a driving force in the sliding direction by the gear 63. Further, the slide member 61 is provided such that the longitudinal direction thereof forms an acute angle with the longitudinal direction of the lever 30.

In this manner, when the slide member 61 is slid, the locking projection 62 is accordingly moved.
Is in contact with the lever 30. For this reason,
The same operation and effect as in the case of the above-described drive mechanism 10 can be obtained.

Further, an auxiliary lever 71 may be provided as an auxiliary rotating member in addition to the lever 30 as in a driving mechanism 70 shown in FIGS. 7A and 7B. In this configuration, the auxiliary lever 71 is provided rotatably about a rotation shaft 72 provided at a predetermined point on the rotation shaft 21 side of the arm 20. Further, the auxiliary lever 71 is provided with a spring 36 at a predetermined position on the distal end side separated from the rotation shaft 72.
Is attached via a spring locking portion 73. Thereby, the auxiliary lever 71 is configured to receive the urging force by the spring 36.

Further, a long groove 74 is formed along the longitudinal direction of the lever 30, and a protruding pin 75 provided on the distal end side of the auxiliary lever 71 is fitted in the long groove 74. In such a configuration, the auxiliary lever 71
When the arm 20 is pushed in a state in which the locking projection 41 is in contact with the locking projection 41, the auxiliary lever 71 can rotate correspondingly against the urging force of the spring 36.

However, when the recording medium 12 is ejected and the locking projection 41 is in contact with the lever 30, if the lever 30 attempts to rotate, the long groove 74 also moves in the same direction as the lever 30 rotates. Try to rotate. However, the projecting pin 75 fitted in the long groove 74
From the direction in which the lever 30 is about to rotate, whereby the rotation of the lever 30 is restricted. Moreover, since the auxiliary lever 71 is also connected to the spring 36, the projecting pin 75 does not move along the long groove 74 while restricting the rotation of the lever 30.

As described above, since the rotation of the lever 30 is hindered by the presence of the projecting pin 75, the gear 40 and the auxiliary lever 71 are directly connected when the recording medium 12 is ejected. It is possible to rotate the arm 20 without rotating it. That is, when the recording medium 12 is inserted, the lever 30 and the auxiliary lever 71 can bend, but when the recording medium 12 is ejected, the lever 30 and the auxiliary lever 71 do not bend and are directly connected.

Although the above-described arm 20 has a crescent shape, the shape of the arm 20 is not limited to this, and a rectangular flat plate may be used. Further, the arm 20 may be formed by combining a plurality of frame members. 20 may be configured.

[0095]

According to the present invention, when the contact change driving means contacts the second rotating member, when the contact is inserted (during storage), the contact is moved from the rotating fulcrum of the second rotating member. It is in the separated state. Thereby, even if the second rotating member receives the biasing force from the biasing means, it is possible to reduce the force generated at the contact point between the second rotating member and the contact point varying driving means. Becomes

When the recording medium is inserted, the contact point is closer to the pivot point of the first pivot member than when the recording medium is ejected. As a result, a smaller rotational torque is generated in the first rotating member than when the recording medium is ejected. Thus, the urging member exerts an urging force when the first rotating member presses the conveying member (recording medium), and it is possible to reduce the pressing force exerted on the user as a reaction force.
Thereby, the user feels that the resistance when inserting the recording medium is small, and it becomes easy to insert the recording medium, and the user feeling is improved.

When the recording medium is ejected, the opposite is true. When the conveying member (recording medium) is ejected, the rotation of the second rotation member is relatively close to the rotation fulcrum. Since the contact point is located on the fulcrum side, the contact point is separated from the pivot point of the first pivot member by that much. As a result, as compared with the time when the recording medium is inserted, the rotation torque generated in the first rotating member is increased, and it is possible to give a sufficient ejection force to the ejection of the recording medium. Can be discharged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a driving mechanism according to an embodiment of the present invention.

FIGS. 2A and 2B are diagrams showing a configuration around an arm and a gear in the drive mechanism of FIG. 1, wherein FIG. 2A is a plan view and FIG. 2B is a side view.

3A and 3B are diagrams illustrating an operation state of a force generated between an arm, a lever, and a gear in the drive mechanism of FIG.
FIG. 7B is a diagram showing a state immediately before the gear is driven by the pressing of the recording medium, and FIG. 7B is a diagram showing a state immediately after the gear rotates and the locking projection comes into contact with the arm to eject the recording medium. FIG.

FIGS. 4A and 4B are diagrams showing a configuration of a driving mechanism provided with a torsion spring among driving mechanisms according to a modification of the present invention, wherein FIG. 4A is a plan view and FIG. 4B is a side view.

FIG. 5 is a plan view showing a configuration of a drive mechanism provided with a slide member among drive mechanisms according to a modification of the present invention.

FIG. 6 is a diagram showing a configuration of a driving mechanism provided with an auxiliary lever, among driving mechanisms according to a modification of the present invention;
(A) is a plan view, and (b) is a side view.

FIG. 7 is a view showing a configuration of a conventional drive mechanism, and (a) of FIG.
Is a perspective view, and (b) is a side view of a configuration centering on an arm.

[Description of Signs] 10, 50, 60, 70 Drive mechanism 11 Conveying member 12 Recording medium 20 Arm (first rotating member) 22 Guide projection 23 Pull-out part 25 Stopper receiving part 30 Lever 32: Tip portion 33: Sliding gap 34: Stopper portion 36: Spring 40: Gear 41, 62: Locking projection 51: Torsion spring 61: Slide member 71: Auxiliary lever (auxiliary rotating member) 74: Long groove

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsumi Ohno 1-14-6 Dogenzaka, Shibuya-ku, Tokyo Inside Kenwood Corporation (72) Inventor Satoshi Nakamura 1-16-16 Dogenzaka, Shibuya-ku, Tokyo Stock Company Inside Kenwood (72) Inventor Hisanori Togawa 1-14-6 Dogenzaka, Shibuya-ku, Tokyo F-term in Kenwood Corporation (Reference) 5D046 CB11 CD05 HA10 5D094 AB08 BE04 EC01

Claims (10)

[Claims] 1. A driving mechanism for driving a conveying member on which a recording medium is mounted, and storing and discharging the conveying member, wherein the driving mechanism is rotatably provided and slides the conveying member. A first rotating member connected to the transport member, and rotatably attached to the first rotating member,
A second rotating member receiving an urging force from an urging means attached to the first rotating member; and a second rotating member abutting against the second rotating member. A contact-contact changing drive means in which the contact changes with the progress of driving, wherein the contact member is pushed by the force exerted between the second rotating member and the contact-contact change driving means when the conveying member is pushed in. A driving mechanism, wherein the contact-contact varying driving means is positioned so that the rotational torque of the first rotating member is smaller than when the conveying member is discharged. 2. A driving mechanism for driving a conveying member on which a recording medium is mounted, and storing and discharging the conveying member, wherein the driving mechanism is rotatably provided and slides the conveying member. A first rotating member connected to the transport member; a first rotating member rotatable with respect to the first rotating member such that a distal end portion is directed to a rotating fulcrum side of the first rotating member. A second rotating member that is attached and receives an urging force from urging means attached to the first rotating member, and abuts against the second rotating member; The contact point for the rotating member is located on the distal end side away from the rotation fulcrum of the second rotating member in the initial state when the transport member is stored, and is in the initial state when the transport member is discharged. In the state, it is located on the side close to the rotation fulcrum of the second rotation member. And a contact-contact-variation driving means for changing a contact point in contact with the second rotating member with the progress of driving. 3. The drive mechanism according to claim 1, wherein said contact-contact variable drive means is formed by forming a locking projection on a rotatable gear member. 4. The drive mechanism according to claim 1, wherein the second rotation member is a torsion spring that generates an urging force about a rotation fulcrum. 5. The contact-contact varying drive means includes a locking member formed on a slide member slidable in a sliding direction, and the sliding direction of the slide member is set to a value corresponding to that of the second rotating member. The drive mechanism according to claim 1, wherein the drive mechanism is provided so as to form an acute angle with a direction connecting the rotation fulcrum and the tip. 6. The first rotating member is provided with a cut-out portion having a predetermined size in the vicinity of a mounting position of the second rotating member and closer to a rotation fulcrum than the mounting position. The second pivoting member is positioned so as to reach the punching portion, and the locking is performed in a sliding gap existing between the second pivoting member and a side edge of the punching portion. The drive mechanism according to any one of claims 3 to 5, wherein the projection is positionable. 7. A stopper receiving portion for restricting a turning direction and a turning position of the second turning member is formed on the first turning member, and the second turning member is provided with a stopper receiving portion. A stopper portion is formed on the rotating member so as to be engaged with the stopper receiving portion. The stopper receiving portion is provided with the stopper portion so as not to narrow the sliding gap to a predetermined distance or less. The drive mechanism according to claim 6, wherein the second rotation member is restricted by being engaged. 8. The drive according to claim 1, wherein the biasing means is attached to the second pivot member on a side of the pivot point. mechanism. 9. The urging means is attached to an auxiliary turning member which turns in conjunction with the turning of the second turning member, and the second turning member has the second turning member. A long groove is formed along the direction connecting the rotation fulcrum and the tip of the rotation member, and a protruding pin formed on the auxiliary rotation member is slidably positioned in the long groove so that the second groove is formed. The drive mechanism according to any one of claims 1 to 3, wherein the turning member and the auxiliary turning member can be interlocked. 10. An information recording / reproducing apparatus using the driving mechanism according to claim 1. Description: