JP3387790B2 - Tray loading mechanism of recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray loading mechanism of a recording / reproducing apparatus in which a tray is moved in and out of a front surface of an apparatus body by using a drive motor as a drive source, and particularly, the drive motor is stopped at a retracted position of the tray. The present invention relates to an overstroke absorption mechanism when a player hits.

[0002]

2. Description of the Related Art A cassette tape player known as a tray-loading type recording / reproducing apparatus of this kind is arranged such that a tray can be inserted into and taken out of an apparatus body equipped with a drive mechanism of a magnetic tape and the like. By moving the holder from the raised position to the lowered position at the position, the tape cassette placed on the holder is disengaged from the reel stand of the drive mechanism. In this case, a pair of sliders is held on both left and right sides of the tray so as to be locked or unlocked, and by transmitting the rotational force of the drive motor to the sliders, the lifting / lowering operation of the holder can be performed at the tray retracted position. Done. That is, the support shafts protruding from the left and right sides of the holder engage with the elevating guides formed on both side walls of the tray and the inclined cam grooves formed on both sliders, so that the tray and both sliders are locked. The holder is held in the raised position while being moved integrally, and the holder is moved up and down between the raised position and the lowered position only when both sliders are unlocked and move with respect to the tray.

Conventionally, in such a tray loading mechanism, by arranging a detection switch and a switch operating member on the side surface of the apparatus main body and moving the switch operating member toward the detection switch in the process of retracting the tray, A configuration is adopted in which the detection switch is operated to stop the drive motor. Here, the switch operating member is composed of two lever members rotatably connected via a spring, and when a pressing portion provided on the slider comes into contact with one lever member in the process of retracting the tray, both lever members are Move in the tray pull-in direction,
When the other lever member pushes the actuator of the detection switch at the retracted position of the tray, both lever members rotate against the spring. Therefore, even if the slider continues to move back a little due to inertia after the drive motor stops at the tray retracted position based on the operation signal from the detection switch, this overstroke causes both lever members of the switch operating member to rotate. By doing so, it is possible to prevent the detection switch from being subjected to an unreasonable force.

[0004]

As described above, according to the above-mentioned prior art, the overstroke after stopping the drive motor at the retracted position of the tray is absorbed by the rotation of both lever members of the switch operating member. However, since the switch operating member becomes complicated by combining the two lever members and the spring, there is a problem that the structure is complicated and the assembling workability is deteriorated.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in the process of retracting a tray, the pressing portion is brought into contact with the end face of the projection to tilt the switch operating member to move it downward, and the switch operating member is an actuator of the detection switch. After pressing, the protrusion is retracted below the pressing portion to absorb the overstroke. According to this structure, since one switch operating member only needs to be tilted and moved downward in the process of retracting the tray, the overstroke absorbing mechanism including the switch operating member can be simplified and the assembling workability can be improved. it can.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In a tray loading mechanism of a recording / reproducing apparatus according to the present invention, a tray which is arranged so as to be able to move in and out of a front surface of a device body and has a pressing portion on its side surface
A drive motor for reciprocating the tray between a retracted position and a push-out position, a detection switch for stopping the drive motor at the retracted position of the tray, and a reciprocally movably disposed side surface of the device body, the upper surface A switch operating member having a protrusion, and a spring member biasing the switch operating member in a direction away from the detection switch,
In the process of pulling in the tray, the pressing portion is brought into contact with the protrusion to incline the switch operating member to move the switch downward.
After the switch operating member presses the actuator of the detection switch, the protrusion is retracted below the pressing portion.

The member provided with the pressing portion may be any member as long as it moves integrally with the tray at least in the process of retracting the tray. For example, when the tray is a cartridge carrier holder and the tray retracted position, the holder is provided. In the case of having a pair of sliders for moving up and down, it is preferable to provide the pressing portion on either one of these sliders.

[0008]

EXAMPLES Examples will be described with reference to the drawings.
1 is a plan view of a cassette tape player, FIG. 2 is a front view of the cassette tape player, FIG. 3 is a rear view of the cassette tape player, FIG. 4 is a right side view of the cassette tape player, and FIG. 5 is the cassette tape. FIG. 6 is a left side view of the player, FIG. 6 is an explanatory view of main parts when the tray is pulled out from the back side, FIG. 7 is a front view of the device body, FIG. 8 is a left side view of the device body, and FIG. 9 is a front face of a switch operating member. FIG. 10, FIG. 10 is a side view of the switch operating member, FIG. 11 is a plan view of the clamper member, FIG. 12 is a front view of the clamper member, FIG. 13 is a rear view of the tray, and FIG. 14 is a line AA of FIG. 15 is a plan view of the first slider, FIG. 16 is a side view of the first slider, FIG. 17 is a plan view of the second slider, FIG. 18 is a side view of the second slider, and FIG. 20 is a rear view of the link lever, and FIG. 21 is a sectional view taken along line CC of FIG. 19, FIG. 22 is a rear view of the holder, FIG. 23 is a side view of the holder, FIG. 24 is a rear view of the holder, and FIG. 25 is an explanatory view showing the positional relationship between the projecting piece and the restricting portion as the holder moves up and down, FIG. 26 is an explanatory view showing the locked state of the link lever, and FIG. 27 is an explanatory view showing the unlocked state of the link lever. 28 is an operation explanatory view of the switch operating member, and FIG. 29 is an explanatory view showing a pressing portion of the clamper member with respect to the tape cassette 7.

As shown in FIGS. 1 to 6, a cassette tape player according to an embodiment has a device body 1 on which mechanism parts such as a drive mechanism (not shown) are mounted, and a device body 1.
A tray 2 that can be moved in and out of the tray 2, a holder 3 that is held in the tray 2 so as to be able to move up and down, first and second sliders 4 and 5 that move the holder 3 up and down at the retracted position of the tray 2, and A tray loading system that includes a link lever 6 that connects the first and second sliders 4 and 5 and that transports the tape cassette 7 placed on the holder 3 into the apparatus body 1 as the tray 2 is pulled in. Has been adopted.

As shown in FIG. 7, the drive mechanism including a pair of reel stands 8 and 8 is disposed on the inner bottom surface of the device body 1, and the reel stands 8 and 8 are loaded around them. Three positioning protrusions 9 that support the bottom surface of the tape cassette 7 are provided upright. Flat rail portions 10a and 10b are formed inside the left and right walls of the device body 1,
A flat base plate 11 is formed at a position rising from the rear ends of the rails 10a and 10b. A cam projection 12 is provided at the center of the upper surface of the base plate 11, and the cam projection 12 has a release groove 12a extending obliquely rearward with respect to the drawing direction of the tray 2.

As shown in FIG. 8, a guide hole 13 and an arc-shaped escape hole 14 are formed in one side wall of the device main body 1, and the guide hole 13 extends horizontally along the drawing direction of the tray 2. It has a portion and an inclined portion that extends obliquely downward with respect to the drawing direction of the tray 2. As shown in FIG. 5, the reduction gears 15 and 16 are axially supported outside the side wall, and the drive motor 1 disposed inside the device body 1
The rotary shaft 7 is projected, and the belt 19 is stretched between the pulley 18 and the reduction gear 15 which are press-fitted into the rotary shaft. Further, a push-type first detection switch 2 for stopping the drive motor 17 is provided on one side wall of the device body 1.
0 is attached and the switch operating member 2 is operated by pressing the actuator of the first detection switch 20.
1 is provided.

As shown in FIGS. 9 and 10, the switch operating member 21 has a boss 2 which is inserted into the guide hole 13.
1a is formed, and the boss 21a is formed in the guide hole 13
The switch operating member 21 reciprocates on one side wall of the device main body 1 by being guided to. Further, a protrusion 21b is formed on the upper surface of the switch operating member 21, and the protrusion 21b projects from one rail portion 10a. Further, the switch operating member 21 has a rectangular hole 21c.
A track-shaped hole 21d and a claw portion 21e are formed, and the shaft of the reduction gear 15 is located inside the hole 21d to allow the switch operating member 21 to move.

Returning to FIG. 1, a pressing plate 22 is screwed to both side walls of the device body 1, and a clamper member 23 for pressing the upper surface of the loaded tape cassette 7 is rotatably supported. As shown in FIG. 11 and FIG. 12, this clamper member 23 is made of a U-shaped metal plate in which shaft supporting portions 23a and 23b at both ends are connected by a bridging portion 23c, and a pin 24 is fixed to one shaft supporting portion 23a. Has been done. Clamper member 2
Four protrusions are formed on the bridging portion 23c of No. 3, and the pressing portions 25 made of synthetic resin are attached to the two central protrusions, and the left and right protrusions function as auxiliary portions 26. Pressing part 25
The amount of protrusion is set to be larger than the auxiliary portion 26 by a predetermined dimension t, and only the pressing portion 25 presses the upper surface of the tape cassette 7.

Shaft support portions 23a, 2 of the clamper member 23
3b are rotatably supported on both side walls of the device body 1, and a pin 24 fixed to one of the shaft supporting portions 23a is adapted to rotate in the escape hole 14. The pin 24 is inserted through the hole 21c of the switch operating member 21, and as shown in FIG.
A coil spring 27 is stretched between the first claw portion 21e, and the switch operating member 21 and the clamper member 23 are connected via the coil spring 27. As shown in FIG. 4, another coil spring 28 is stretched between the other shaft support portion 23b and the side wall of the device body 1, and the clamper member 23 is given a restoring force by this coil spring 28. There is. A lever-type second detection switch 29 for stopping the drive motor 17 is attached to the side wall of the device body 1, and the second detection switch 29 is mounted on the other rail portion 10.
It projects from b.

As shown in FIGS. 13 and 14, two protrusions 2 are formed on one side of the inner surface of the left and right side walls of the tray 2.
a is provided in a projecting manner, and vertically extending guide holes 3 are provided in both hanging walls 2b facing the side walls with a predetermined distance therebetween.
Two 0s are formed on each side. The top plate of the tray 2 is provided with a rectangular opening 31, a track-shaped elongated hole 32, and an arc-shaped escape hole 33. The elongated hole 32 extends in a direction orthogonal to the drawing direction of the tray 2. There is. Also, a plurality of ribs 34 are provided on the back surface of the top plate of the tray 2.
The arcuate portions of the ribs 34 are arranged concentrically around the elongated hole 32, and a hook 34a is formed in a part of the rib 34. Outermost rib 3
4 is formed with a lock portion 35 that bulges outward, and this lock portion 35 is located on a straight line passing through the long axis of the long hole 32. Further, both hanging walls 2b are provided on the back surface of the top plate of the tray 2.
Restricting portions 2c are respectively provided at positions separated by a predetermined distance from, and these restricting portions 2c are opposed to the upper end portions of the rear elevating guide holes 30 formed in each hanging wall 2b.

As shown in FIG. 6, a first slider 4 is slidably disposed between one side wall of the tray 2 and a hanging wall 2b facing the side wall, and the lower surface of the first slider 4 is It is placed on one rail portion 10a of the device body 1. As shown in FIGS. 15 and 16, two slanted cam holes 36 and two horizontally extending guide holes 37 are formed in the first slider 4, and both of the guide holes 37 are protrusions of the tray 2. By being guided by 2a, the first slider 4 can move forward and backward with respect to the tray 2. A rack 4a is formed on the lower surface of the first slider 4, and the rack 4a meshes with the final stage gear 16a of the reduction gear 16 (see FIG. 5). Further, a pressing portion 38 for driving the protrusion 21b of the switch operating member 21 is provided at the center of the lower surface of the first slider 4, and an ear piece 39 having a notch 39a is provided at the rear end of the upper surface of the first slider 4. It is projected toward.

A second slider 5 is slidably arranged between the other side wall of the tray 2 and a hanging wall 2b facing the other side wall, and the lower surface of the second slider 5 is the bottom of the device body 1. It is placed on the other rail portion 10b. Figure 1
7 and FIG. 18, the second slider 5 is also formed with two inclined cam holes 40 and two guide holes 41 extending in the horizontal direction, and both guide holes 41 are formed on the protrusions 2a of the tray 2. The second slider 5 can move forward and backward with respect to the tray 2 by being guided. However, since a rack is not formed on the lower surface of the second slider 5,
The ear piece 4 having a notch 42a at the rear end of the upper surface of the slider 5
2 is projected inward.

The first slider 4 and the second slider 5 are connected to each other by a link lever 6 on the back surface of the top plate of the tray 2, and can be moved in opposite directions as the link lever 6 rotates. As shown in FIGS. 19 to 21, a boss 6a protruding to both front and back surfaces is formed at the center of the link lever 6, and a retaining piece 6b and a retaining piece 6c are formed so as to sandwich the boss 6a. The upper portion of the boss 6a is inserted into the long hole 32 of the tray 2, and the link lever 6
Is rotatably and movably supported by the slot 32. The retaining piece 6b is inserted into the escape hole 33 and engages with the upper surface of the tray 2 to prevent the link lever 6 from falling out of the tray 2. Further, a pin 6d is formed on one end of the link lever 6 so as to project to both front and back surfaces, and a pin 6e is formed at the other end of the link lever 6 so as to project to the back surface. The lower portion of one pin 6d engages with the notch 39a of the first slider 4, and the other pin 6e has the notch 42 of the second slider 5.
engaged with a. Further, the latching piece 6c and the latching portion 34a.
A coil spring 43 is stretched between and, and the coil lever 43 urges the link lever 6 toward the first slider 4 side so that the upper portion of one pin 6d is engaged with the lock portion 35 of the tray 2. ing. The pin 6d and the lock portion 35
The rotation of the link lever 6 is prohibited in the engaged state of
The first slider 4 and the second slider 5 connected via the link lever 6 cannot slide with respect to the tray 2, and as will be described later, the release groove 12a of the cam projection 12 causes the pin 6d and the lock portion to be locked. When the engagement of 35 is released, the first slider 4 and the second slider 5 slide in opposite directions via the rotating link lever 6.

The holder 3 is made of synthetic resin. As shown in FIGS. 22 to 24, two support shafts 3a are provided on each of the left and right side walls of the holder 3 on each side. The lower part of the bridge is bridged by the flat plate-shaped mounting portion 3b. Both side walls on the rear end side of the mounting portion 3b are projecting pieces 3c extending rearward, and one of the support shafts 3a is provided on the outer surface of each of the projecting pieces 3c. Each of the support shafts 3a is inserted into the elevating guide hole 30 of the tray 2 and engaged with the cam hole 36 of the first slider 4 and the cam hole 40 of the second slider 5, respectively.
Moves in the cam holes 36 and 40 while being guided by the elevating guide hole 30 by moving forward and backward with respect to the tray 2, and the holder 3 moves up and down in the opening 31 of the tray 2 accordingly. At that time, when the holder 3 is in the raised position as shown in FIG. 25A, the protruding piece 3c of the holder 3 faces the restriction portion 2c formed on the back surface of the top plate of the tray 2,
When the holder 3 is in the lowered position as shown in (b) of
The protruding piece 3c is adapted to be separated from the restriction portion 2c.
Therefore, even if an external force that deforms the protruding piece 3c inward is applied at the raised position of the holder 3, the protruding piece 3c comes into contact with the restriction portion 2c, so that the support shaft 3a causes the cam hole 36 ,.
It can be prevented from falling out of 40. On the other hand, holder 3
During the assembling work of assembling the tray 2 into the tray 2, if the protruding piece 3c is bent inward at the lowered position of the holder 3 where the restricting portion 2c does not interfere, the support shaft 3a is lifted up and down the guide hole 30 and the cam holes 36, 4.
It can be easily inserted into 0.

Next, the operation of the cassette tape player constructed as above will be described. Here, FIG. 6 shows a drawing-out position in which the tray 2 projects from the device body 1. Hereinafter, the operation from the drawing-out position to the drawing-in position will be described together with the raising / lowering operation of the holder 3.

When the tray 2 is pulled out as shown in FIG. 6, the support shafts 3a of the holder 3 are engaged with the upper portions of the cam holes 36 and 40 of the first and second sliders 4 and 5, and the holder 3 is in the raised position. Held in. Therefore, even if an external force that deforms the protruding piece 3c inwardly acts in this state, the restricting portion 2c prevents the support shaft 3a from falling off, as described above. After the tape cassette 7 is placed on the placing portion 3b of the holder 3 at the pull-out position of the tray 2, when the drive motor 17 rotates in either forward or reverse direction, this rotational force causes the pulley 18, belt 19 and reduction gear 15 to rotate. Is transmitted to the final stage gear 16a of the reduction gear 16 via the gear, and the gear 16a and the rack 4a mesh with each other to cause the first slider 4 to move.
Is driven. At this time, the pin 6d of the link lever 6 is engaged with the lock portion 35 of the tray 2, and the first slider 4 and the second slider 5 connected via the link lever 6 slide with respect to the tray 2. Therefore, the tray 2 and the sliders 4 and 5 are integrally drawn into the device body 1.

When the tray 2 is pulled in this way, as shown in FIG.
Gradually approaching the cam projection 12 provided on the base plate 11 of
At the retracted position where a part of the tray 2 comes into contact with the device body 1, the lower portion of the boss 6a provided in the center of the link lever 6 comes into contact with the release groove 12a of the cam projection 12. as a result,
First, the link lever 6 moves toward the second slider 5 side against the urging force of the coil spring 43 to release the engagement between the pin 6d and the lock portion 35, and then, as shown in FIG. It rotates clockwise about the long hole 32 of 2.
In this case, since the link lever 6 rotates with the rib 34 as the sliding surface, the sliding resistance between the two is reduced. Then, as the link lever 6 rotates, the first slider 4 and the second slider 5 slide with respect to the tray 2 in mutually opposite directions, and the support shafts 3a of the holder 3 move from the upper part of the cam holes 36, 40 to the lower part thereof. Holder 3 is moved to the tape cassette 7
At the same time, the tape cassette 7 moves from the raised position to the lowered position, and the tape cassette 7 is loaded into the drive mechanism. At that time, as shown in (b) of FIG.
However, since the holder 3 is completely housed inside the device body 1, an external force for bending the protruding piece 3c inward does not act, and the support shaft 3a moves up and down. It does not fall out from the guide hole 30 and the cam holes 36 and 40.

Since the first slider 4 slides on the rail portion 10a in the process of retracting the tray 2, as shown in FIG.
As shown in, the pressing portion 38 of the first slider 4 presses the end surface of the protruding portion 21b protruding above the rail portion 10a. As a result, the switch operating member 21 moves diagonally downward from the horizontal direction along the guide hole 13, and the clamper member 23 starts to rotate along with the movement of the switch operating member 21, and the pressing portion 25 of the clamper member 23. Presses the upper surface of the tape cassette 7. The clamper member 23 moves integrally with the switch operating member 21 via the coil spring 27 until the pin 24 contacts the end of the escape hole 14, but the pin 2
When 4 touches the end of the escape hole 14, only the switch operating member 21 moves to extend the coil spring 27, so that a large rotational biasing force is applied to the clamper member 23 from the coil spring 27. At that time, as shown in FIG. 29, the pressing portion 25 of the clamper member 23 is set so as to press the upper surface of the tape cassette 7 in the inner region of the triangle S connecting the three positioning protrusions 9, so that the pressing portion 25 is pressed. Even if the tape cassette 7 is slightly displaced, the tape cassette 7 can be reliably supported by the respective positioning projections 9 at three points, and the tape cassette 7 is prevented from rising. On the other hand, the auxiliary portion 26 has the triangle S
When the tape cassette 7 is mounted on the mounting portion 3b of the holder 3 in a tilted state, the auxiliary position of the tape cassette 7 is corrected during the rotation of the clamper member 23. Perform various functions.

When the switch operating member 21 moves to the vicinity of the end of the guide hole 13, the switch operating member 21 moves diagonally downward as shown in FIG.
The actuator of the detection switch 20 is pressed, and the drive motor 17 is stopped based on the signal from the first detection switch 20. In this case, the first slider 4 continues to be driven by a slight amount due to inertia even after the drive motor 17 is stopped (overstroke), but during this overstroke period,
Since the pressing portion 38 moves on the upper surface of the protruding portion 21b that is recessed in the rail portion 10a, the switch operating member 21 does not move further. Therefore, an unreasonable force does not act on the actuator of the first detection switch 20, and damage to the first detection switch 20 can be prevented.

When the tray 2 is advanced from the retracted position to the retracted position, the reverse operation is performed, and the lower surface of the second slider 5 passes the actuator of the second detection switch 29 protruding from the rail portion 10b. Then, the second detection switch 29 is operated to stop the drive motor 17.

[0026]

The present invention is carried out in the form as described above, and has the following effects.

A tray, which is arranged so as to be able to move in and out of the front surface of the device body and has a pressing portion on its side surface, a drive motor which reciprocates the tray between a retracted position and an pushed position, and the drive motor described above. A detection switch that is stopped at the retracted position of the tray, a switch operation member that is reciprocally arranged on the side surface of the device body, and has a protrusion on its upper surface, and a direction that separates the switch operation member from the detection switch. And a biasing spring member, the pressing portion is brought into contact with the protrusion in the process of retracting the tray to incline the switch operating member to move the switch operating member downward, and the switch operating member operates the actuator of the detection switch. If the protrusion is configured to be retracted below the pressing portion after pressing, one switch operating member is tilted downward in the process of retracting the tray. Only by moving, because it can absorb the overstroke after stopping the drive motor, the overstroke absorbing mechanism is simplified, can be enhanced assembling workability.

[Brief description of drawings]

FIG. 1 is a plan view of a cassette tape player.

FIG. 2 is a front view of the cassette tape player.

FIG. 3 is a rear view of the cassette tape player.

FIG. 4 is a right side view of the cassette tape player.

FIG. 5 is a left side view of the cassette tape player.

FIG. 6 is an explanatory diagram of a main part when the tray is pulled out from the back side.

FIG. 7 is a front view of the device body.

FIG. 8 is a left side view of the device body.

FIG. 9 is a front view of a switch operating member.

FIG. 10 is a side view of the switch operating member.

FIG. 11 is a plan view of a clamper member.

FIG. 12 is a front view of the clamper member.

FIG. 13 is a rear view of the tray.

14 is a sectional view taken along the line AA of FIG.

FIG. 15 is a plan view of a first slider.

FIG. 16 is a side view of the first slider.

FIG. 17 is a plan view of a second slider.

FIG. 18 is a side view of the second slider.

FIG. 19 is a rear view of the link lever.

20 is a cross-sectional view taken along the line BB of FIG.

21 is a cross-sectional view taken along the line CC of FIG.

FIG. 22 is a rear view of the holder.

FIG. 23 is a side view of the holder.

FIG. 24 is a rear view of the holder.

FIG. 25 is an explanatory view showing the positional relationship between the protruding piece and the restricting portion as the holder moves up and down.

FIG. 26 is an explanatory diagram showing a locked state of the link lever.

FIG. 27 is an explanatory diagram showing a lock release state of the link lever.

FIG. 28 is an operation explanatory view of the switch operating member.

FIG. 29 is an explanatory diagram showing a pressing portion of the clamper member with respect to the tape cassette 7.

[Explanation of symbols]

1 device body 2 trays 2a protrusion 2b hanging wall 2c Regulation Department 3 holder 3a spindle 3b mounting part 3c protruding piece 4 First slider 4a rack 5 Second slider 6 Link lever 6a boss 6d, 6e pin 7 tape cassette 9 Positioning protrusion 10a, 10b rail part 11 base plate 12 Cam protrusion 12a release groove 13 Guide hole 14 escape hole 15, 16 reduction gear 17 Drive motor 20 First detection switch 21 Switch operation member 21 are provided. 21a Boss 21b Projection 23 Clamper member 23a, 23b Shaft support 23c Bridge section 25 Pressing part 26 Auxiliary section 27 coil spring 30 Lift guide holes 32 long hole 34 ribs 35 Lock part 36, 40 Cam hole 38 Pressing part 43 coil spring

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hideo Kojima 1-76 Kawanayama-cho, Showa-ku, Nagoya, Aichi Prefecture Zero Engineering Co., Ltd. (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 15 / 675 G11B 17/04

Claims (2)

(57) [Claims] 1. A tray which is arranged to be able to move in and out of a front surface of a device body and has a pressing portion on its side surface, a drive motor which reciprocates the tray between a retracted position and a pushed position, and the drive motor. Detection switch for stopping the tray at the retracted position of the tray, a switch operation member reciprocally arranged on the side surface of the device body and having a protrusion on its upper surface, and separating the switch operation member from the detection switch. A spring member for urging the switch operation member in the drawing process of the tray to bring the pressing portion into contact with the protrusion to incline the switch operation member to move the switch operation member downward. A tray loading mechanism for a recording / reproducing apparatus, wherein the protrusion is retracted below the pressing portion after the actuator is pressed. 2. The tray according to claim 1, wherein the tray has a carrier holder for a cartridge and a pair of sliders for moving the holder up and down at a retracted position of the tray, and the pressing portion is provided with one of the sliders. A tray loading mechanism for a recording / reproducing apparatus, which is provided in the.