KR0155772B1 - Mini disk player - Google Patents

Abstract

Disclosed is a mini disc player capable of continuously inserting, seating, and elevating a magnetic head with one power source. This moves the holder 20 for accommodating the disc cartridge and the slide member 30 for elevating and guiding the holder 20 while the drive plate member 60 slides back and forth by the driving of the motor member, and also moves the magnetic head 122. Try to lift. This is a simple structure for the insertion operation of the disc cartridge 170 from one power source (motor member), the lifting operation for elevating the magnetic head to seat and separate the disk on the turntable, and the recording operation for contacting the magnetic head with the disk surface. The present invention provides a mini disc player that can be played continuously.

Description

Mini disc player

1 is a perspective view of a mini disc player according to the present invention.

2 is a schematic plan view of FIG. 1 with no disc cartridge inserted.

3 is a schematic plan view of a player according to the present invention with a disc cartridge inserted;

4 is a schematic plan view of the player according to the invention with the disc seated on the turntable.

5 is an exploded perspective view of the main portion of the player according to the present invention.

6 (a) (b) (c) are schematic diagrams for explaining the operation of the present invention.

7 is a schematic diagram showing the main parts of the present invention.

(A) and (b) of FIG. 8 are schematic diagrams for explaining the lifting operation of the magnetic head.

9 is a schematic perspective view showing an essential part of the present invention.

* Explanation of symbols for main parts of the drawings

10 door member 20 holder

21,22: first guide pin 30: slide member

35,36: Second guide pin 37,37 ': Inclined hole

60: driving plate member 70: interlocking plate member

80: ejection lever 84: roller

85: spring 90: stopper

100: main chassis 101,102: guide slot

110: insertion hole 120: support member

122: magnetic head 130, 140, 150: first, second, third switch member

160: disc 170: disc cartridge

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mini disc player, and in particular, a slot in mini disc player (mini) which loads and ejects a disc with a simple structure and raises and lowers the magnetic head according to the loading / ejecting operation of such a disc. disc player).

Generally, discs storing high density information are used embedded in the cartridge 170 as shown in FIG. 8 to be protected from dust and impact. The disc cartridge 170 is provided with a shutter (not shown) for opening and closing the hole 171 so that a part of the disc 160 can be exposed, and the shutter groove is formed in the shutter.

In order to employ and record / reproduce the cartridge 170 having the disc 160 embedded therein, a series of driving devices for opening the shutter and seating the disc 160 on the turntable while inserting the cartridge 170 into the player. Are required. In addition, when the information is recorded on the disc 160, the magnetic head is brought into contact with the surface of the disc 160, and during reproduction, the lifting operation of the magnetic head is required to separate the magnetic head from the disc.

Conventionally, for such driving operations, the insertion and ejection operation of the cartridge and the lifting operation of the magnetic head can be continuously performed by separate motors. However, these components have a large number of parts, high power consumption, and complicated structure. There is this.

The present invention has been made to solve the above problems, and provides a mini disc player which allows simple insertion and withdrawal of the cartridge and lifting and lowering of the magnetic head with a simple structure and a reduced number of parts. The purpose is.

The present invention to achieve the above object is a turn table for rotating the disk of the disk cartridge, an optical pickup for irradiating the light to read the information, a magnetic head for recording the information on the disk, and the turn table is installed A chassis, a holder slidably installed in the main chassis and containing a disc cartridge, guide means for guiding the holder horizontally and vertically with respect to the main chassis, driving means for sliding the holder, and And elevating means for elevating the magnetic head to contact / disconnect the disk seated on a turn table, and ejecting means for ejecting the disk cartridge from the holder.

The present invention for achieving the above object is a turn table for rotating the disk of the disk cartridge, an optical pickup for irradiating light to the disk to read information, the main chassis provided with the turn table and the optical pickup, and sliding the main chassis A holder capable of being coupled to receive the disc cartridge, guide means for guiding the holder in a horizontal / vertical direction with respect to the main chassis, drive means for driving the holder in sliding movement, and recording information on the disc. A mini disc player having a magnetic head, elevating means for elevating the magnetic head, and ejecting means for ejecting a disc cartridge from a holder, wherein the guide means has a horizontal guide portion and a vertical guide portion on the side of the main chassis. To form a guide slot and to allow the holder to slide in the guide slot A first guide pin is coupled to each other, and the first guide pin is slidably coupled to the inclined long hole inclined with respect to the horizontal guide portion of the guide slot, and the second slot slidably coupled to the guide slot of the main chassis. A guide pin is formed and includes a slide member slidably installed between the main chassis and the holder, so that the holder is guided in the horizontal / vertical direction along the guide slot according to the horizontal movement of the slide member. It is done.

According to a feature of the present invention, the guide means forms a guide hole having a horizontal guide portion and a vertical guide portion on the side of the main chassis, and forms a first guide pin slidably coupled to the guide hole in the holder The first guide pin is slidably coupled to each other, and the second guide pin is slidably coupled to the inclined long hole inclined with respect to the horizontal guide portion of the guide slot and the guide slot of the main chassis. It is provided with a slide member slidably installed between the holder, so that the holder is guided in the horizontal / vertical direction along the guide hole according to the horizontal movement of the slide member.

In addition, the driving means; A guide hole having a horizontal guide part and a vertical guide part is formed on a side surface of the main chassis, and a first guide pin is slidably coupled to the guide hole in the holder, and the first guide pin is slidably coupled. And a sloping long hole inclined with respect to the horizontal guide portion of the guide long hole, and a second guide pin slidably coupled to the guide long hole of the main chassis, the slide member being slidably installed between the main chassis and the holder. And a driving plate member having a coupling hole to which the first guide pin is coupled and having a rack gear portion at an end thereof, the driving plate member being slidably installed between the slide member and the holder, and a motor member transmitting power to the rack gear portion. It can be provided to slide the holder by the power of the motor member.

The lifting means is; An interlocking pin fixed to the support member while the magnetic head is supported by a support member having a hinge portion fixed to the main chassis and arranged in a direction orthogonal to an insertion direction of the disc cartridge, and an upper portion of the holder; And a linkage plate member which is installed in the disk cartridge and is movable in the insertion / ejection direction of the disc cartridge and is in contact with and separated from the interlocking pins. It is possible to raise and lower the magnetic head.

Wherein the leaf spring is formed by extending the leaf spring having a first contact portion horizontally contacted with the interlocking pin upon initial contact with the interlocking pin and a second contact portion extending and concavely bent in the first contact portion. Contact with the pin.

On the other hand, the extraction means; A ejection lever rotatably hinged to an upper surface of the holder and extending at an end thereof vertically inward to the holder and contacting an end of the disc cartridge; and an ejection lever elastically biased in the ejection direction of the disc cartridge; And a locking means for locking / unlocking the takeout lever so that the takeout lever rotates with the spring and the restoring force to take out the disc cartridge.

The locking means is fixed to the other end of the main chassis so that one end of the stopper member having a guide surface parallel to the insertion / ejection direction of the disc cartridge is positioned on the holder, and the other end of the takeout lever By installing a roller member in contact with the guide surface, the disc cartridge is inserted into the holder to contact the push piece to rotate the ejection lever and at the same time the roller member contacts the guide surface when the holder is moved in the disc cartridge insertion direction. Can be locked.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a schematic perspective view of a mini disc player according to the invention. The main chassis 100 is provided with a turntable for rotating a disk (not shown) and an optical pickup for irradiating light to the disk to read information, and the main chassis 100 is horizontally / vertically mounted by a predetermined guide means. A holder 20 is provided, which is guided in a direction and moved by a predetermined driving means and accommodates a disc cartridge.

Then, the recording magnetic head 122 is installed on the disk seated on the turn table so as to be lifted and contacted / separated by a predetermined lifting means, and a takeout means for taking out the disk cartridge from the holder 20 is provided.

The configuration of the guide means is as follows. Referring to FIGS. 1 and 5, guide holes 101 and 102 having horizontal guide parts 101 ′ and 102 ′ and vertical guide parts 101 and 102 on side surfaces of the main chassis 100. ) Is formed. The holder 20 has first guide pins 21 and 22 slidably coupled to the guide long holes 101 and 102. A slide member 30 is provided between the main chassis 100 and the holder 20 and slidable on the side thereof. The first guide pins 21 and 22 of the holder 20 are slidably coupled to the slide member 30, and the horizontal guides 101 ′ and 102 ′ of the guide holes 101 and 102 are slidably coupled thereto. The inclined long holes 37 and 37 'are inclined with respect to each other, and the second guide pins 35 and 36 are slidably coupled to the guide long holes 101 and 102 of the main chassis 100. Formed.

By the guide means, the holder 20 may be guided in the horizontal / vertical direction along the guide long holes 101 and 102 according to the horizontal movement of the slide member 30.

The configuration of the drive means for moving the holder 20 along the guide means is as follows. Referring to FIG. 5, the driving plate member 60 is slidably installed between the slide member 30 and the holder 20. The driving plate member 60 has a coupling hole 61 to which the first guide pins 21 and 22 are coupled, and has a rack gear portion 62. And the main chassis 100 is provided with a motor member (not shown) for powering the drive plate member 60, the power transmission between the motor member and the rack gear portion 62 of the drive plate member 60. A plurality of gear trains were used. The gear train includes drive gears 131 coupled to the shaft of the motor member and driven gears 134 and 134 'engaged with the rack gear portion 62 of the drive plate member 60, thereby connecting them therebetween. It has a plurality of intermediate gears (132, 133). Here, the guide pin 31 is formed on the upper surface of the slide member 30, and the guide piece 65 guided to the guide pin 31 is formed on the drive plate member 60. Therefore, the driving plate member 60 is guided to the guide pin 31 can be moved stably.

The construction of the elevating means for elevating the magnetic head 122 to be in contact with / separated from the disk surface is as follows. Referring to FIGS. 1 and 8 (a) and (b), the fixing part 124 fixed to the main chassis 100 and the pivoting part 126 connected to the hinge part 121 so as to be rotatable therewith are shown. The supporting member 120 is provided. The rotating part 126 is supported with a head lever 121 for supporting the magnetic head 122.

And the interlocking pin 123 is fixed to the rotation part 125 in a direction orthogonal to the insertion direction of the disc cartridge 170. An upper surface of the slide member 30 which is slidably installed in the holder 20 is provided with an interlocking plate member 70 which is connected to the driving plate member 60 and movable together, and the interlocking plate member 70 is An extension of the leaf spring 71 having a first contact portion 72 horizontally contacted with the interlocking pin 123 and a first contact portion 73 extending concave and curved to the first contact portion 72 is formed. It is. When the interlocking plate member 70 is moved to contact the interlocking pin 123 with the first contact portion 72, the magnetic head 122 is raised as shown in FIG. 8B, and the interlocking plate When the member 70 is further moved so that the interlocking pin 123 is positioned at the second contact portion 73, the interlocking pin 123 is lowered as shown in FIG. Will come into contact. Here, the linkage plate member 70 is coalesced with the slide member 30 and the spring 34. The guide pin 32 is formed on the upper surface of the slide member 30, and the guide piece 75 guided to the guide pin 32 is formed on the interlocking plate member 70. Therefore, the interlocking plate member 70 may be guided to the guide pin 32 to be stably moved.

On the other hand, the configuration of the ejection means for keeping the disc cartridge 170 in the holder 20 in the inserted state and ejecting the disc cartridge 170 from the holder 20 is as follows. Referring to FIGS. 1 and 5, the upper surface of the holder 20 is provided with a hinge 82 rotatably provided with an a-shaped take out lever 80. One end of the ejecting lever 80 is formed with a contact piece 81 extending vertically into the holder 20 to be in contact with the end of the disc cartridge 170, and one end of the ejecting lever 80 and the holder. 20 is connected by a spring 85. The ejecting lever 80 is elastically biased in the ejecting direction of the disc cartridge 170. And locking means for locking / unlocking the take-out lever 80 is provided.

Referring to FIG. 1 and FIG. 3 showing the unlocked lever 80 and the unlocked state of FIG. 3, the locking means is inserted / extracted from the disc cartridge 170 on the holder 20. The other end is fixed to the main chassis 100 so that one end of the stopper member 90 having a guide surface 91 in parallel with the guide surface 91 is positioned, and the guide surface 91 is provided at the other end of the takeout lever 80. By installing the roller member 84 in contact with), when the disc cartridge 170 is inserted into the holder 20, it is in contact with the push piece 81 to rotate the take-off lever 80 and at the same time the holder 20 When the disc cartridge 170 is moved in the insertion direction, the roller member 84 is brought into contact with the guide surface 91 to be locked.

On the other hand, referring to Figure 1, the disc cartridge 170 is inserted into the holder 20 on the upper surface of the holder 20, one end of the take-off lever 80 is in contact when the take-off lever 80 is rotated An operating first switch member 130 is installed, and the slide member 30 is moved on the upper surface of the slide member 30 so as to be in contact with the roller member 84 of the take-out lever 80 to be operated. A third switch member 150 is installed in contact with the switch member 140 and the moving driving plate member 60. At the end of the take-out lever 80, a protrusion 83 is formed in direct contact with the first switch member 130.

When the first switch member 130 is operated, power is applied to the motor member (not shown). When the second switch member 140 is operated, power is cut off from the motor member, and the third switch member 150 is When operated, power is applied to the motor member so that the driving plate member 60 is further moved in the disc cartridge 170 insertion direction.

The door member 10 is rotatably coupled to the main chassis 100 at the insertion hole 110 in which the disc cartridge 170 is inserted.

The operation of the mini disc player according to the present invention configured as described above is as follows.

[Disk Cartridge Insertion Operation]

1 to 3, the disc cartridge 170 is pushed into the insertion hole 110 in the state shown in FIGS. 1 and 2. At this time, the door member 10 is rotated into the insertion hole (110). As the tip piece 81 of the ejecting lever 80 contacts the tip of the disc cartridge 170 to be inserted, the tip piece 81 is rotated as shown in FIG. At this time, the spring 85 is tensioned and the projection 83 of the take-out lever 80 contacts the first switch member 130 to apply power to the motor member (not shown). As will be described in the following disk mounting operation) In the state where the projection 83 is in contact with the first switch member 130, the disk cartridge continues to enter slightly further inward. At this time, the holder 20 is moved inward and the slide member 30 is also moved inward. That is, referring to FIGS. 5 and 7, when the holder 20 is moved inward, the first guide pin 22 is moved along the engaging hole 61 of the driving plate member 60 (the driving at this time). The plate member is stopped, and the slide member 30 is also moved inward together with the first guide pin 22.

On the other hand, as shown in FIG. 3, since the holder 20 is moved inward in the state in which the takeout lever 80 is rotated, the roller 84 of the takeout lever 80 is guide surface 91 of the stopper 90. As shown in FIG. Guided in contact with. Therefore, the takeout lever 80 is to be restored and rotated by the restoring force of the spring 85, but is locked by the stopper 90 to maintain the insertion state of the disc cartridge 170.

(A) of FIG. 6 shows the initial state in which the disc cartridge 170 is not inserted into the holder 20, and (b) shows the state in which the disc cartridge 170 has been inserted into the holder 20. As shown in FIG.

[Disk seating and playback operation]

As described above, when the projection 83 of the ejection lever 80 rotated to the first switch member 130 contacts and supplies power to the motor member (not shown), in the state (b) of FIG. The operation is made in the state. That is, referring to FIGS. 1 and 5, the motor gear 131 is rotated to fit the rack gear part 62 of the driving plate member 60 through the plurality of gears 132, 133, and 134. The pinch rotates the gear 134 '. Accordingly, the drive plate member 60 is moved to the left side, and the linkage plate member 70 connected with the drive plate member 60 is also moved in the same direction. At this time, the driving plate member 60 and the interlocking plate member 70 are stably moved while the guide pieces 65 and 75 are guided to the guide pins 31 and 32 formed on the slide member 30. In addition, the slide member 30 is connected to the interlocking plate member 70 by a spring 34 so that the slide member 30 moves together with the predetermined section when the driving plate member 60 is moved.

When the driving plate member 60, the interlocking plate member 70, and the slide member 30 are moved as described above, the first guide pin 21 coupled to the inclined long holes 37 and 37 ′ of the slide member 30 is provided. As the 22 is interlocked, the holder 20 is also moved together. That is, when the slide member 30 is moved as shown in (b) to (c) of FIG. 6, the holder 20 has the first guide pins 21 and 22 being inclined long holes 37 and 37. ') And guide guide holes 101 and 102 of the main chassis 100 are guided along the vertical guides 101' and 102 'to descend. At this time, the disk of the disk cartridge 170 is seated on the turn table (not shown).

At the same time as the holder 20 is lowered, the interlocking plate member 70 is also moved so that the first contact portion 72 of the leaf spring 71 moves as shown in FIGS. 4 and 8 (b). Supporting the interlocking pin 123 installed in 120.

On the other hand, when the holder 20 is lowered, as shown in FIG. 9, the extension piece 182 of the lever member 180 is rotated and supported simultaneously with the protrusion piece 103 formed on the main chassis 100. The head lever 121 is lowered. At this time, the head lever 121 is not lowered despite the rotation of the lever member 180 because the interlocking pin 123 is in a state supported by the first contact portion 72 of the interlocking plate member 70. Thus, after the disk is seated on the turn table, the magnetic head 122 is not in contact with the disk.

In this state, the spindle motor and the optical pickup, not shown, are operated to read information from the disk.

[Proxy behavior]

When the magnetic head 122 is brought into contact with the disk to record information, by operating the recording mode button, power is applied to the motor member to move the drive plate member 60 further inward. At this time, the holder 20 and the slide member 30 is the first and second guide pins 21, 22, 35, 36 is the vertical guide 101 of the guide hole 101, 102 ( By being locked by 102, only the driving plate member 60 is moved inward, and is no longer moved. Accordingly, as the driving plate member 60 is moved inward, the interlocking pin 123 is supported on the first contact portion 72 as shown in FIG. As described above, the interlocking pin 123 is supported by the second contact portion 73. Therefore, as the head lever 121 descends, the magnetic head 122 comes into contact with the disk. In this manner, the recording operation is performed while the magnetic head 122 is in contact with the disk surface.

On the other hand, when the driving plate member 60 is moved to its end to operate the third switch member 150, the power is cut off to the motor member by the control of the microcomputer to prevent the overload.

As described above, the disc cartridge ejecting operation of the mini disc player according to the present invention may be performed in a reverse operation of the above operation. When a part of them is described, the roller 84 of the take-out lever 80 moves out of the stopper 90 when the holder 20 is moved in the take-out direction in conjunction with the drive plate member 60 driven by the drive of the motor member. The disk cartridge 170 is taken out while being rotated by the restoring force of the spring 85 when separated from the guide surface 91.

As described above, the present invention provides an operation of inserting the disc cartridge 170 from one power source (motor member), a lifting operation of elevating the magnetic head so as to mount and detach the disk from the turntable, and the magnetic head on the disk surface. Provided is a mini disc player capable of continuously performing a recording operation in contact with a simple structure.

The present invention solves the problem of a large number of parts, large power consumption, and complicated structure by operating a separate motor of the conventional cartridge insertion and withdrawal operations and the magnetic head lifting operations.

Claims (13)

A turn table for rotating the disk of the disc cartridge, an optical pickup for irradiating the disk to read information, a magnetic head for recording information on the disk, a main chassis provided with the turn table, and a sliding to the main chassis. And a guide means for guiding the holder horizontally and vertically with respect to the main chassis, a drive means for sliding the holder, and a disc seated on the turn table. And elevating means for elevating and disengaging the magnetic head, and ejecting means for ejecting the disc cartridge from the holder. According to claim 1, The guide means forms a guide hole having a horizontal guide portion and a vertical guide portion on the side of the main chassis, the holder forms a first guide pin slidably coupled to the guide hole, The first guide pin is slidably coupled to the inclined long hole inclined with respect to the horizontal guide portion of the guide hole, and the second guide pin is slidably coupled to the guide hole of the main chassis, the main chassis and the holder And a slide member slidably installed therebetween, so that the holder is guided in the horizontal / vertical direction along the guide slot according to the horizontal movement of the slide member. According to claim 1, The drive means forms a guide hole having a horizontal guide portion and a vertical guide portion on the side of the main chassis, the holder forms a first guide pin slidably coupled to the guide hole, The first guide pin is slidably coupled to the inclined long hole inclined with respect to the horizontal guide portion of the guide hole, and the second guide pin is slidably coupled to the guide slot of the main chassis, the main chassis and the holder A slide member slidably installed therebetween, a driving plate member having a coupling hole to which the first guide pin is coupled and having a rack gear portion at an end thereof, and slidably installed between the slide member and the holder; Mini disc characterized in that it comprises a motor member for transmitting power to the gear portion Layer. The method of claim 1, wherein the lifting means is supported by a support member having a hinge portion fixed to the main chassis and rotatable to the magnetic head, and fixed to the support member while being arranged in a direction orthogonal to an insertion direction of the disc cartridge. And an interlocking pin to be installed on the holder, the interlocking plate member mounted on the holder and movable in the insertion / ejection direction of the disc cartridge and contacting / separating with the interlocking pin, so that the interlocking plate member is in contact with the interlocking pin. Mini disc player, characterized in that configured to rotate when the support member is separated. The plate spring of claim 4, wherein the leaf spring includes a first contact portion horizontally contacted with the interlocking pin at an initial contact with the interlocking pin, and a second contact portion extending from the first contact portion to be concavely curved. Featuring a mini disc player. 2. The ejecting lever according to claim 1, wherein the ejecting means is rotatably hinged to an upper surface of the holder and has a push piece having one end thereof vertically extended inward to the holder and contacting an end of the disc cartridge. And a spring for elastically biasing the ejection direction of the disc cartridge, and locking means for locking / unlocking the ejection lever. 7. The locking means according to claim 6, wherein the locking means is fixed to the other end of the main chassis so that one end of the stopper member having a guide surface parallel to the insertion / extraction direction of the disc cartridge is positioned on the holder. By installing a roller member in contact with the guide surface at the other end of the lever, the roller member is inserted into the holder to contact the mill piece to rotate the takeout lever and at the same time the roller member is moved in the disc cartridge insertion direction. Mini disc player, characterized in that configured to be locked in contact with the guide surface. A turn table for rotating a disk of a disk cartridge, an optical pickup for irradiating light to the disk to read information, a main chassis provided with a turn table and an optical pickup, and a main cartridge slidably coupled to accommodate the disk cartridge. A holder for guiding the holder in a horizontal / vertical direction relative to the main chassis, driving means for driving the holder in a sliding movement, a magnetic head for recording information on the disk, and a magnetic head. A mini disc player comprising elevating means for elevating and ejecting means for ejecting a disc cartridge from a holder, wherein the guide means forms a guide hole having a horizontal guide portion and a vertical guide portion on the side of the main chassis, To form a first guide pin slidably coupled to the guide slot in the The first guide pin is slidably coupled to the inclined long hole which is inclined with respect to the horizontal guide portion of the guide hole, and the second guide pin is slidably coupled to the guide hole of the main chassis. And a slide member slidably installed between the holders, wherein the holders are guided in the horizontal / vertical direction along the guide hole according to the horizontal movement of the slide members. According to claim 8, The drive means forms a guide hole having a horizontal guide portion and a vertical guide portion on the side of the main chassis, the holder forms a first guide pin slidably coupled to the guide hole, The first guide pin is slidably coupled to the inclined long hole inclined with respect to the horizontal guide portion of the guide hole, and the second guide pin is slidably coupled to the guide slot of the main chassis, the main chassis and the holder A slide member slidably installed therebetween, a driving plate member having a coupling hole to which the first guide pin is coupled and having a rack gear portion at an end thereof, and slidably installed between the slide member and the holder; Mini disc player characterized in that it comprises a motor member for transmitting power to the gear portion It followed. The method of claim 8, wherein the elevating means is supported by the support member having a hinge portion which is fixed to the magnetic head and the main chassis, and fixed to the support member while being arranged in a direction orthogonal to the insertion direction of the disc cartridge. And an interlocking pin to be installed on the holder, the interlocking plate member mounted on the holder and movable in the insertion / ejection direction of the disc cartridge and contacting / separating with the interlocking pin, so that the interlocking plate member is in contact with the interlocking pin. Mini disc player, characterized in that configured to rotate when the support member is separated. The plate spring of claim 10, wherein a leaf spring having a first contact portion horizontally contacted with the interlocking pin at the initial contact with the interlocking pin and a second contact portion extending and extending concavely bent in the first contact portion are formed. Featuring a mini disc player. The take-out lever according to claim 8, wherein the take-out means is rotatably hinged to an upper surface of the holder and has a push piece having one end thereof vertically extended inward to the holder and contacting an end of the disc cartridge; And a spring for elastically biasing the ejection direction of the disc cartridge, and locking means for locking / unlocking the ejection lever. 13. The locking means according to claim 12, wherein the locking means is fixed to the other end of the main chassis so that one end of the stopper member having a guide surface parallel to the insertion / extraction direction of the disc cartridge is positioned on the holder. By installing a roller member in contact with the guide surface at the other end of the lever, the roller member is inserted into the holder to contact the mill piece to rotate the takeout lever and at the same time the roller member is moved in the disc cartridge insertion direction. Mini disc player, characterized in that configured to be locked in contact with the guide surface.