JP2004118991A - Loading mechanism of tray and recording medium reproducing device provided with the loading mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a loading mechanism of a tray in which enlarging of a device is suppressed and a manufacturing cost can be reduced. <P>SOLUTION: This mechanism is provided with a tray 2 on which a CD or the like can be placed, a motor 3, and a transmission mechanism 4 converting rotary motion by this motor 3 to a linear motion and transmitting it to the tray 2, further, the mechanism is provided with a cam plate 6 which moves the tray 2 back and forth by the transmitting mechanism 4 for a main body chassis 1, shifted in the direction being orthogonal to movement direction of the tray 12 by drive of the motor 3, while displacing it up and down as shifting supporting a reading part 5 for reading contents of the CD or the like, and a deceleration position detecting switch 7 for detecting variation of movement speed of the tray, the deceleration position detecting switch 7 is arranged at a movement line of the cam plate 6 being separated from the transmission mechanism 4, and on-off operation is performed by being abutted by an end part of the cam plate 6. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tray loading mechanism for moving a tray on which a recording medium can be loaded into and out of a tray storage unit.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a reproducing apparatus for reproducing, for example, a CD (compact disc) or a DVD (digital versatile disc), a loading mechanism for moving a tray forward and backward with respect to a main body chassis serving as a tray storage unit is provided (see FIG. 1). For example, see Patent Document 1). When playing a CD or the like, the user takes the tray in and out of the main body chassis by this loading mechanism, places the CD and the like on the tray, and removes the CD and the like from the tray.
[0003]
[Patent Document 1]
JP-A-3-18956
[0004]
A plurality of models of the playback device having different prices depending on whether various functions are mounted or not are manufactured. For example, in relatively inexpensive models, the speed at which the tray advances from the main chassis and the speed at which the tray retreats to the main chassis are often substantially constant. On the other hand, in relatively high-end models, the speed at which the tray advances from the main chassis and the speed at which the tray retreats to the main chassis are often changed.
[0005]
For example, when the tray is advanced from the main body chassis, the transition is performed at a low speed immediately after the start of the advance and then at a high speed, and again at a low speed immediately before the stop after the tray has sufficiently advanced. Such a tray advancing / retracting control can provide a more luxurious feeling.
[0006]
Here, the tray is moved forward and backward with respect to the main body chassis by adopting a so-called rack and pinion method using a rack formed on one side of the tray and a gear (pinion) rotatably supported by the main body chassis. . The gears are rotated by the rotation of a motor provided in the main body chassis, and the motor is rotated by a microcomputer, for example. Therefore, the above-mentioned tray advance / retreat control is performed by changing the rotation speed of the motor by the microcomputer according to the time at which the tray moves at a low speed and the time at which the tray moves at a high speed.
[0007]
[Problems to be solved by the invention]
The above-mentioned reproducing apparatus is mass-produced in a factory or the like. In the above-described forward / backward control for changing the rotation speed of the motor according to the forward / backward movement time of the tray at low speed and high speed, for example, the frictional force between the tray and the main body chassis is increased. , The forward / backward speed of the tray may not be stable. For example, the position where the forward / backward speed changes may be too fast or too slow. In the worst case, the tray may not decelerate. For this reason, there is a problem that it is difficult to make the tray advance / retreat control uniform in all reproduction apparatuses mass-produced.
[0008]
Therefore, a method has been proposed in which the change position of the tray advance / retreat speed is detected by a detection switch. That is, the position of the tray when the speed of the tray shifts from deceleration to high speed and from high speed to low speed is detected by the detection switch, and the low speed and high speed advance / retreat control of the tray is performed based on the output. According to the forward / backward control, the forward / backward speed of the tray can be reliably changed at an appropriate position where the forward / backward speed should be changed regardless of the forward / backward speed of the tray.
[0009]
Here, in the reproducing apparatus, since the tray is advanced and retracted by the rack and pinion method as described above, the gears (pinions) and the motors are located inside the main body chassis and on the side of the tray in the direction in which the tray advances. Often provided in. If the gears and the like are on the depth direction side of the main body chassis, the gears and the rack may not be meshed.
[0010]
In order to detect the position of the tray, the above-described detection switch also needs to be arranged inside the main body chassis and on the side of the tray in the direction in which the tray advances. However, since a gear and the like are provided in this portion, if the detection switch is further arranged, the area of the portion becomes large and the device becomes large. In addition, a wiring cable must be separately routed to the vicinity of gears and the like inside the main body chassis for the detection switch, and there has been a problem that the operation cost is increased.
[0011]
The present invention has been conceived under such circumstances, and it is an object of the present invention to provide a tray loading mechanism capable of suppressing an increase in the size of an apparatus and reducing manufacturing costs. That is the subject.
[0012]
DISCLOSURE OF THE INVENTION
In order to solve the above problems, the present invention takes the following technical measures.
[0013]
According to a first aspect of the present invention, there is provided a tray loading mechanism, a tray on which a recording medium can be placed, a motor, and transmitting the rotation to the tray while converting a rotational motion by the motor into a linear motion. A tray loading mechanism for moving the tray with respect to the tray storage unit by the transmission unit, wherein the motor is driven in a direction orthogonal to the tray moving direction. A support plate that is moved and supports a reading unit for reading the contents of the recording medium while displacing the reading unit in the vertical direction with the movement; and a detection unit for detecting a change position of the advance / retreat speed of the tray. Means, wherein the detection means is arranged on a movement straight line of the support plate and is separated from the transmission means, and On By the end of contact, and characterized in that it is configured to be off operation.
[0014]
According to a preferred embodiment, the support plate is provided with a projection guided by a groove formed to be substantially meandering on one surface of the tray, and the detecting means is configured such that the projection of the support plate is When the support plate is guided in the groove of the tray as the tray advances and retreats, the support plate is turned on and off by being moved in a direction perpendicular to the direction of movement of the tray based on the shape of the groove. .
[0015]
According to another preferred embodiment, the detection means comprises a detection switch, and the detection switch is mounted on a substrate on which the motor is mounted and which is provided on the back side of the tray storage section.
[0016]
According to the present invention, when the motor is rotationally driven, the rotational motion is converted into linear motion by the transmission means, and the tray can be advanced and retracted with respect to the main body chassis (tray storage portion) by this linear motion. . When the tray is housed in the main body chassis, the reading plate and the CD or the like placed on the tray come close to each other by the support plate supporting the reading unit in an upright manner, and the reading unit records the recording medium (CD or the like). Is read. On the other hand, when the tray is advanced outward, the support plate supports the reading unit at the lowered position, and separates the reading unit from the tray.
[0017]
At this time, the support plate is moved in a direction perpendicular to the direction in which the tray moves forward and backward by the rotation of the motor, and the protrusion formed on the support plate is guided by the guide groove of the tray. Make a slight movement in the direction you want. Since the detection switch is disposed on the extension of the movement of the support plate, which is separated from the transmission means, the fine movement of the support plate causes the end of the support plate to abut on the detection switch and turn it on. In this case, if the arrangement position of the detection switch and the shape of the groove are set so that the timing at which the detection switch is turned on coincides with the timing at which the tray advance / retreat speed changes, the tray advance / retreat speed can be set to an appropriate value. It can be surely changed at the timing.
[0018]
Since the detection switch is arranged on the movement extension line of the support plate, which is separated from the transmission means, it is not provided near the transmission means constituted by gears or the like as in the related art. What is necessary is just to mount on the board | substrate arrange | positioned on a movement extension line. Therefore, it is not necessary to enlarge the space in which the transmission means is provided, and it is possible to suppress an increase in the size of the device. In addition, if the detection switch is mounted on the board, a circuit can be formed on the pattern of the board, so that it is not necessary to separately route a wiring cable, and an increase in operation cost can be suppressed.
[0019]
A recording medium reproducing apparatus provided by the second aspect of the present invention is characterized by including the tray loading mechanism provided by the first aspect of the present invention.
[0020]
According to the present invention, a higher-grade recording medium reproducing apparatus capable of performing the above-described tray advancing / retreating operation while having the same operation and effect as the tray loading mechanism provided by the first aspect of the present invention. Can be provided.
[0021]
Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
[0023]
FIG. 1 is a partially cutaway plan perspective view of a tray loading mechanism according to an embodiment of the present invention, FIG. 2 is a front view of the loading mechanism shown in FIG. 1, and FIG. FIG. 4 is a perspective view of the cam plate and its peripheral parts.
[0024]
This loading mechanism is incorporated and provided in a reproducing apparatus for reproducing a recording medium such as a CD. The loading mechanism is generally constituted by a main body chassis 1 as a tray storage portion and a tray 2 supported so as to be able to move forward and backward and a CD or the like can be placed thereon. It is to make it.
[0025]
The main body chassis 1 includes a motor 3, a transmission mechanism 4 for converting the rotational motion of the motor 3 to a linear motion and transmitting the linear motion to the tray 2, and a body such as a CD provided in the main body chassis 1. A reading unit 5 for reading (see FIG. 4), a cam plate 6 for supporting the reading unit 5 and vertically displacing it, and a deceleration position detection switch 7 for detecting a change position of the advance / retreat speed of the tray 2 And In FIG. 1, reference numeral 1a denotes a main body chassis cover.
[0026]
The tray 2 is formed in a substantially rectangular shape in a plan view, and has a concave portion 2a for mounting a CD or the like on an upper surface near one end thereof. As shown in FIG. 3, a frame 2b is formed on the lower surface (back surface) of the tray 2 along both longitudinal ends and one lateral end thereof. In the vicinity of the inside of the tray 2b, there is formed a rack 2c extending substantially in a wavy manner along the longitudinal direction of the tray 2 and meshing with a fourth gear 17 described later.
[0027]
In addition, a guide groove 9 having a substantially L-shape in plan view is formed near the other frame piece 2b opposite to the one frame piece 2b. The guide groove 9 is formed to meander substantially and guides a projection 22 (described later) provided on the cam plate 6.
[0028]
The guide groove 9 is provided near a first end of the tray 2 and extends from the central portion along the short direction thereof, and a second groove 9a connected to the first groove 9a and bent obliquely and extends. A groove portion 9b, a third groove portion 9c connected to the second groove portion 9b and extending along the longitudinal direction of the tray 2, and a groove portion 9c connected to the third groove portion 9c and bent obliquely toward the inside of the tray 2. A fourth groove 9d extending to the outside of the tray 2; a fifth groove 9e connected to the fourth groove 9d and extending along the longitudinal direction of the tray 2; A sixth groove 9f, which is bent obliquely and extends, a seventh groove 9g connected to the sixth groove 9f, and extends along the longitudinal direction of the tray 2, and a sixth groove 9g connected to the seventh groove 9g. Bent obliquely toward the outside of 2 And eighth groove 9h extending, provided continuously to the eighth groove 9h, is constituted by a ninth groove 9i extending along a longitudinal direction of the tray 2.
[0029]
As shown in FIG. 2, the motor 3 is provided on the main body chassis 1 in the form of being mounted on a board 31 provided near the one end of the main body chassis 1 and provided therebelow. The axis of the motor 3 is controlled by a CPU (not shown) to be rotatable. A transmission mechanism 4 for transmitting the rotational force to the tray 2 is connected to the motor 3.
[0030]
The transmission mechanism 4 is generally constituted by first and second pulleys 11 and 12, a belt 13, and first to fifth gears 14 to 18 (for the fifth gear 18, see FIG. 2). The first pulley 11 is provided concentrically with the motor 3. A second pulley 12 is arranged near the motor 3, and an endless belt 13 is stretched between the first pulley 11 and the second pulley 12. A first gear 14 is concentrically fixed to the second pulley 12.
[0031]
The first gear 14 is meshed with a second gear 15 having a larger diameter. A third gear 16 and a fifth gear 18, which are concentric and have smaller diameters, are fixed to the second gear 15. That is, the second gear 15, the third gear 16, and the fifth gear 18 constitute a three-stage gear.
[0032]
A fourth gear 17 having a larger diameter is meshed with the third gear 16. The fourth gear 17 forms a rack-and-pinion by being meshed with the rack 2c formed on the tray 2, and moves the tray 2 forward and backward. In addition, when the tray 2 is stored, the fourth gear 17 is not yet engaged with the rack 2c as shown in FIG.
[0033]
The cam plate 6 is movably supported in a short direction of the main body chassis 1 (a direction orthogonal to the direction in which the tray 2 advances and retreats). And the second pulleys 11 and 12 and the first, second and fifth gears 14, 15 and 18 for transmission and movement. The cam plate 6 also has a function of displacing the reading unit 5 in the vertical direction (details will be described later).
[0034]
As shown in FIG. 4, the cam plate 6 is formed in a substantially L-shape in cross section, extends in the horizontal direction, and has a rectangular horizontal surface portion 19, and a substantially rectangular vertical surface portion 20 which extends in an orthogonal direction from one end thereof. And
[0035]
A rack 21 meshing with the fifth gear 18 is formed at the center of one end of the horizontal surface portion 19. Protrusions 22 that are guided by the guide grooves 9 formed on one surface of the tray 2 are provided at appropriate places on the horizontal surface portion 19.
[0036]
A substantially Z-shaped cam hole 23 is formed in the vertical surface portion 20. A protrusion 26 provided at one end of an inner case 25 for accommodating a spindle and a servo (both not shown) constituting the reading unit 5 is loosely fitted in the cam hole 23. As the chassis 1 moves in the lateral direction, the protrusion 26 moves in the cam hole 23. Note that the inner case 25 of the reading unit 5 is supported on the other end of the reading unit 5 opposite to the one end where the protrusion 26 is formed so as to be able to descend with respect to the main body chassis 1.
[0037]
Thus, when the projection 26 is present above the cam hole 23 (when the tray 2 is stored), one end of the inner case 25 is raised, and the reading unit 5 approaches the CD or the like placed on the tray 2. The contents such as a CD can be read. On the other hand, when the projection 26 is present below the cam hole 23 (when the tray 2 advances), one end of the inner case 25 is lowered, and the reading unit 5 is separated from the CD or the like placed on the tray 2. Is done.
[0038]
At the lower end of the vertical surface portion 20, a rib 29 for turning on an excessive advance prevention switch 28 (see FIG. 4) described later is formed.
[0039]
As described above, the board 31 on which the motor 3 is mounted is provided at the lower portion of the main body chassis 1. The board 31 includes the deceleration position detection switch 7, which is a feature of the present embodiment, and the overrun prevention switch. 28 are implemented.
[0040]
The deceleration position detection switch 7 is a push-type switch, and is a momentary switch that automatically returns when not pressed. The deceleration position detection switch 7 is mounted on the board 31 and on a movement extension line of the cam plate 6. That is, the cam plate 6 is moved by the protrusion 22 being guided in the guide groove 9 of the tray 2, and is turned on when the end of the cam plate 6 contacts the deceleration position detection switch 7. Has become.
[0041]
The excessive advance prevention switch 28 is for preventing excessive advance when the tray 2 has sufficiently advanced to the outside, and is a slide switch that slides in the lateral direction of the main body chassis 1. The excessive advance prevention switch 28 is mounted on the back surface of the board 31. When the cam plate 6 moves, the over-advance prevention switch 28 is slid on by being contacted by a rib 29 formed at the lower end of the vertical surface portion 20 of the cam plate 6 as shown in FIG. You.
[0042]
Although not shown in FIGS. 1 and 2, a control board on which a CPU (not shown) is mounted is provided on the lower surface side of the main body chassis 1. The control board includes the board 31 described above. For example, they are connected by a flexible cable. Then, the detection outputs of the deceleration position detection switch 7 and the excessive advance prevention switch 28 mounted on the board 31 are sent to the CPU. The CPU controls the drive of the motor 3 mounted on the board 31 based on the detection outputs from the switches 7 and 28. In this case, the CPU can switch the rotation speed of the motor between two stages, high speed and low speed.
[0043]
Next, the operation of the recording medium reproducing device will be described with reference to FIGS. 1, 2, 5 to 9. First, an operation when the tray 2 is advanced from the main body chassis 1 will be described. 5 to 9, the portion of the transmission mechanism 4 is omitted.
[0044]
When the user performs an operation for moving the tray 2 out of the main body chassis 1, the CPU drives the motor 3 to rotate. With the rotation of the motor 3, the first pulley 11 rotates counterclockwise in FIG. The rotation of the first pulley 11 is transmitted to the second pulley 12 via the belt 13, and the second pulley 12 also rotates counterclockwise. With the rotation of the second pulley 12, the first gear 14 rotates, and the second gear 15 meshed with the first gear 14 rotates clockwise in FIG. Then, with the rotation of the second gear 15, the concentric third gear 16 and fifth gear 18 rotate in the same direction.
[0045]
Since the rack 21 of the cam plate 6 is meshed with the fifth gear 18, the cam plate 6 moves leftward in FIG. 5A by the clockwise rotation of the fifth gear 18. Along with this, the projection 22 formed on the cam plate 6 is also guided leftward in FIG. 5A along the first groove 9a of the guide groove 9 of the tray 2.
[0046]
When the rotation of the motor 3 is continued, the rotation of the fifth gear 18 causes the cam plate 6 to move further to the left as shown in FIG. The engagement of the plate 6 with the rack 21 is released. At substantially the same time, the fourth gear 17 meshed with the third gear 16 is meshed with the rack 2c of the tray 2 provided along the longitudinal direction of the main body chassis 1. The projection 22 of the cam plate 6 reaches the third groove 9c via the second groove 9b as shown in FIG. As a result, the tray 2 is advanced and retracted in the advance direction (downward in FIG. 6A).
[0047]
As shown in FIG. 6B, the projection 26 of the inner case 25 is moved along the cam hole 23 of the vertical surface portion 20 by the movement of the cam plate 6 so that the inner plate 25 (reading portion) is moved. 5) is moved downward. Thus, the reading unit 5 is separated from the CD or the like placed on the tray 2.
[0048]
Further, in the state shown in FIG. 6, when the cam plate 6 is moved, the deceleration position detection switch 7 mounted on the board 31 is pressed down by the end of the cam plate 6 to be turned on (FIG. 6B ) Circle inside). When recognizing the ON state of the deceleration position detection switch 7, the CPU switches the rotation speed of the motor 3 from high speed to low speed. Therefore, the tray 2 advances at a low speed. Although the motor 3 is initially rotated at a high speed by the CPU, the first groove 9a and the second groove 9b of the guide groove 9 are not formed along the longitudinal direction of the tray 2 because the shape of the first groove 9a and the second groove 9b is not formed. The tray 2 is not moved at high speed.
[0049]
Subsequently, when the motor 3 is rotationally driven by the CPU, the protrusion 22 of the cam plate 6 reaches the fourth groove 9d via the third groove 9c of the guide groove 9, as shown in FIG. Here, since the fourth groove 9d is inclined toward the inside of the tray 2, the cam plate 6 moves to return to the right in FIG. 7A accordingly. As a result, the end of the cam plate 6 does not depress the deceleration position detection switch 7 and returns it to the off state (see the circle in FIG. 7B). The CPU returns the motor 3 to high-speed rotation based on the output of the deceleration position detection switch 7. Therefore, the tray 2 advances at a high speed.
[0050]
Further, when the motor 3 is rotationally driven by the CPU, the protrusion 22 of the cam plate 6 reaches the sixth groove 9f via the fifth groove 9e of the guide groove 9 as shown in FIG. Since the sixth groove 9f faces obliquely toward the outside of the tray 2, the cam plate 6 moves again to the left in FIG. As a result, the end of the cam plate 6 presses the deceleration position detection switch 7 again, and the deceleration position detection switch 7 is turned on (see the circle in FIG. 8B). The CPU reduces the rotation speed of the motor 3 based on the output of the deceleration position detection switch 7. Therefore, the tray 2 advances again after being decelerated.
[0051]
Further, when the motor 3 is rotationally driven by the CPU, the projection 22 of the cam plate 6 reaches the eighth groove 9h via the seventh groove 9g of the guide groove 9 as shown in FIG. Since the eighth groove 9h is further obliquely directed toward the outside of the tray 2 as compared with the sixth groove 9f, the cam plate 6 further moves leftward in FIG. 9A accordingly. As a result, as shown in FIG. 9B, the rib 29 formed at one end of the vertical surface portion 20 of the cam plate 6 slides the excessive advance prevention switch 28, and the excessive advance prevention switch 28 is turned on. become. The CPU stops the rotation of the motor 3 based on the output of the overrun prevention switch 28. Therefore, the tray 2 cannot be advanced any further.
[0052]
As described above, according to the present embodiment, when the motor 3 is rotationally driven, the rotational motion is converted into linear motion by the transmission mechanism 4, and the tray 2 moves forward and backward with respect to the main body chassis 1 by this linear motion. Is done. When the tray 2 is accommodated in the main body chassis 1, the cam plate 6 supports the reading unit 5 in a liftable manner, so that the reading unit 5 comes close to a CD or the like placed on the tray 2, and the reading unit 5 causes the CD or the like to approach. Is read. On the other hand, when the tray 2 is advanced outward, the cam plate 6 supports the reading unit 5 at a lowered position, and separates the reading unit 5 from the tray 2.
[0053]
At this time, the cam plate 6 is moved in a direction orthogonal to the direction of movement of the tray 2 by the rotation of the motor 3, and the projection 22 formed on the cam plate 6 is guided to the guide groove 9 of the tray 2. As a result, it moves slightly in the direction orthogonal to the direction. Since the deceleration position detection switch 7 is arranged on the extension of the movement of the cam plate 6, which is separated from the transmission mechanism 4, the fine movement of the cam plate 6 causes the end of the cam plate 6 to move to the deceleration position detection switch 7. Abut and turn it on. In this case, the arrangement position of the deceleration position detection switch 7 and the shape of the guide groove 9 are set so that the timing at which the deceleration position detection switch 7 is turned on coincides with the timing at which the advance / retreat speed of the tray 2 changes. In addition, the moving speed of the tray 2 can be reliably changed at an appropriate timing.
[0054]
Since the deceleration position detection switch 7 is disposed on the extension of the movement of the cam plate 6, which is separated from the transmission mechanism 4, the transmission mechanism 4 including the first gear 14 to the fifth gear 18 and the like as in the related art. , For example, may be mounted on the substrate 31 arranged on the extension of the movement of the cam plate 6. Therefore, it is not necessary to enlarge the space in which the transmission mechanism 4 is provided, and it is possible to suppress an increase in the size of the main body chassis 1. Further, if the deceleration position detection switch 7 is mounted on the board 31, a circuit can be formed on the pattern of the board 31, so that it is not necessary to separately route a wiring cable, thereby suppressing an increase in work cost. Can be.
[0055]
The operation in the case where the tray 2 is advanced from the main body chassis 1 has been described above. However, when the tray 2 is retracted into the main body chassis 1, the tray 2 is retracted in a procedure opposite to the above operation. That is, the CPU rotates the rotation direction of the motor 3 clockwise in FIG. 1, whereby the cam plate 6 moves generally rightward, and the tray 2 advances and retreats in the retreating direction (upward in FIG. 1). Is done. Also in this case, immediately after the tray 2 starts moving forward and backward, and immediately before the tray 2 stops, the tray 2 is moved forward and backward so that the forward and backward speed becomes low, and it is possible to bring out a more luxurious feeling.
[0056]
Of course, the scope of the present invention is not limited to the above embodiment. For example, in the above-described embodiment, a description has been given of a CD, a DVD, or the like as a recording medium. However, the present invention is not limited thereto, and a loading mechanism that targets an MD (mini disk), an FD (floppy disk), a cassette tape, or the like. May be applied. Further, the configurations of the deceleration position detection switch 7 and the over advance prevention switch 28 are not limited to the above embodiment.
[Brief description of the drawings]
FIG. 1 is a partially cutaway plan perspective view showing a tray loading mechanism according to an embodiment of the present invention.
FIG. 2 is a front view of the loading mechanism shown in FIG.
FIG. 3 is a perspective view of the tray as viewed from the back side.
FIG. 4 is a perspective view of a cam plate and its peripheral parts.
FIG. 5 is a diagram for explaining the operation of the recording medium reproducing device shown in FIG. 1;
FIG. 6 is a diagram for explaining the operation of the recording medium reproducing device shown in FIG. 1;
FIG. 7 is a diagram for explaining the operation of the recording medium reproducing device shown in FIG. 1;
8 is a diagram for explaining the operation of the recording medium reproducing device shown in FIG.
FIG. 9 is a diagram for explaining the operation of the recording medium reproducing device shown in FIG. 1;
[Explanation of symbols]
1 Body chassis
2 trays
3 Motor
4 Transmission mechanism
5 Reading unit
6 cam plate
7 Deceleration position detection switch
9 Guide groove
22 protrusion
28 Overtravel prevention switch
31 substrate

Claims (4)

A tray on which a recording medium can be placed, a motor, and transmission means for converting the rotational motion of the motor into a linear motion and transmitting the linear motion to the tray, and the transmission means transfers the tray to a tray storage unit. A tray loading mechanism for moving forward and backward,
When the motor is driven, the tray is moved in a direction perpendicular to the advancing and retreating direction of the tray, and the reading unit for reading the content of the recording medium is supported and displaced in the up and down direction with the movement. A support plate,
Detecting means for detecting a change position of the advance / retreat speed of the tray,
The detection unit is separated from the transmission unit, is arranged on a straight line of movement of the support plate, and is configured to be turned on and off by an end of the support plate abutting. A tray loading mechanism. The support plate is provided with a projection guided by a groove formed to meander substantially on one surface of the tray,
The detecting means moves the support plate in a direction orthogonal to the direction of movement of the tray based on the shape of the groove when the protrusion of the support plate is guided in the groove of the tray as the tray advances and retreats. The tray loading mechanism according to claim 1, wherein the tray loading mechanism is turned on and off by being performed. The detection means comprises a detection switch,
3. The tray loading mechanism according to claim 1, wherein the detection switch is mounted on a substrate on which the motor is mounted and provided on a back side of the tray storage unit. 4. A recording medium reproducing apparatus comprising the tray loading mechanism according to any one of claims 1 to 3.

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