JPH0590630U - Recording medium conveying device for magnetic recording / reproducing device and rotating shaft mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the parts cost and assembly man-hours of the recording medium conveying device. [Structure] A tray 1 is slidably supported by a chassis, and is provided with a longitudinal groove 1b which engages with a shaft 4a of a tray bottom plate 4 and an elongated hole 1f into which a projection 3c of a slider 3 is inserted. The tray 1 is further provided with a T-shaped projection 1c that engages with a T-shaped guide groove 3e of the slider 3 to slidably support the slider 3, a projection 1d that operates a mode detection switch, and a lock arm 13. A supporting shaft 1e is provided.
The slider 3 engages with an oblique guide groove 3a through which the shaft 4a of the tray bottom plate 4 is inserted and a T-shaped protrusion 1c of the tray 1
A shape guide groove 3e is provided. Axis 4 of tray bottom plate 4
a is a guide groove 3a of the slider 3 and a vertical groove 1 of the tray 1.
engage b. The two-mode detection switch fastened to the chassis is actuated by the protrusion 3c of the slider 3 at the end of the rightward movement stroke of the slider 3, and is activated by the protrusion 1d of the tray 1 at the end of the leftward movement stroke of the slider 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic recording / reproducing apparatus, and more particularly, to a recording medium conveying apparatus thereof, and further to a rotary shaft mounting structure used in a magnetic recording / reproducing apparatus or the like.

[0002]

[Prior Art]

 FIG. 12 shows an example of a structure of a recording medium carrying device of a conventional magnetic recording / reproducing device. The tray shown in the figure is supported by the chassis so that it can move horizontally, and the slider is supported by the tray so that it can move horizontally.

When the tray is pressed against the slider by a spring (not shown) and is not regulated by the protrusion of the chassis, when the slider is moved in the horizontal direction due to the engagement of the rack and the drive gear provided on the tray, the slider is moved. However, when the tray is regulated by the chassis, only the slider moves.

The tray bottom plate movably supported by the tray is vertically moved by the relative movement of the tray and the slider at that time. The recording medium thus placed on the tray is mounted on the mechanical deck.

The elongated hole of the slider is locked by a shaft pin provided on the tray and a screw, and the slider is supported by the tray. Further, the projections provided on the slider actuate switches provided on both sides in the moving direction of the slider to detect the end of the loading process and the ejection process of the recording medium.

FIG. 13 shows an example of a conventional rotary shaft mounting structure used in such a recording medium carrying device. The drive gear, in which the gear and pulley are integrally formed, has a hole in the center.The hole is inserted into the shaft set up on the resin chassis and locked by the snap ring It is rotatably supported by the chassis.

[0007]

[Problems to be solved by the device]

 The above-described conventional recording medium conveying device for the magnetic recording / reproducing apparatus has a drawback that two switches are required for detecting the end of the recording medium mounting process and the discharging process, which increases the number of parts and the wiring cost. It was

Further, although the slider is supported by the tray by the shaft and the screw, there is a problem that the number of parts and the number of assembling steps are increased.

Further, the rotary shaft mounting structure described above has a problem in that it is necessary to press-fit the shaft, insert a retaining ring, and the like, which increases the cost of parts and the number of assembling steps.

The present invention has been made in view of the above-mentioned points, and an object thereof is to provide a recording medium carrying device in which the cost of parts and the number of assembling steps are reduced. Another object of the present invention is to provide a rotary shaft mounting structure in which the cost of parts and the number of assembling steps are reduced.

[0011]

[Means for Solving the Problems]

 The recording medium transporting device of the present invention includes a tray horizontally supported by a chassis, a tray bottom plate vertically supported by the tray, and a tray horizontally supported by the tray so that the tray bottom plate is supported by the horizontal movement. It has a slider to be moved up and down, and projections that are rotatably supported by the tray and engage with the chassis and the J-shaped guide grooves of the slider that are curved in mutually opposite directions. The slider and the tray or the chassis and the tray depend on the rotation position. In the recording medium conveying device of the magnetic recording / reproducing device, which has a lock arm that locks one of the sets, the slider is driven horizontally to pull the recording medium into the housing and mount it on the mechanical deck. The end of each process of medium ejection is detected by the two-mode detection switch, and the two-mode detection switch is set to the tray and Ru der those configured to actuate the projection provided to a rider.

In the recording medium carrying device, the slider is formed by outsert molding to cover the sliding surface of the tray or the tray bottom plate with the protrusion with resin, and the T-shaped protrusion provided on the tray and the slider. The T-shaped guide groove provided is engaged.

Further, in the recording medium carrying device, the tray bottom plate is provided with a guide for interfering with the protrusion on the tape side of the side face of the compact cassette.

Further, in the rotating shaft mounting structure of the present invention, the rotating shaft support member is provided with a hole in which an arc portion fitted to the side surface of the rotating shaft and an arc portion having a larger diameter than that are connected by a narrowed portion, and the narrow portion is formed. A hole or a notch is provided in the vicinity of the narrowed portion to make the narrowed portion elastically deformable, and the rotary shaft supporting member is provided with an elastically deformable tongue piece having a recess that engages with the projection at the tip of the rotary shaft. is there.

[0015]

[Action]

 According to the recording medium conveying device of the magnetic recording / reproducing apparatus of the present invention, the end of each process of mounting the recording medium and ejecting the recording medium is detected by one switch, so that the number of parts, assembling man-hours and wiring man-hours are reduced. ..

Further, when the T-shaped projection provided on the tray is engaged with the T-shaped guide groove covered with the resin of the slider, the T-shaped projection can be assembled by inserting it from the branch portion of the T-shaped guide groove. This is possible, and no extra parts are required for the sliding part, reducing the number of parts and the number of assembly steps. Further, since the sliding contact of the relative movement of the tray and the slider is made on the surface of the resin, the frictional resistance is small and the noise is not generated.

Further, if the tray bottom plate is provided with a guide that interferes with the tape-side protrusion on the side surface of the compact cassette, if the compact cassette is inserted in the tray in the wrong direction, the compact cassette floats up, and it is possible to know the incorrect insertion. ..

According to the rotary shaft mounting structure of the present invention, the rotary shaft can be assembled by pushing the rotary shaft into the circular arc portion having the small diameter while deforming the narrowed portion of the rotary shaft support member, and the parts other than the rotary shaft support member can be assembled. It is not necessary, and the number of parts and the number of assembly steps are reduced.

[0019]

【Example】

 A recording medium carrying device of a magnetic recording / reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are exploded perspective views showing a recording medium conveying device of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

Reference numeral 1 shown in the figure is a resin tray, which is slidably supported by the chassis 12 and has longitudinal grooves 1b, 1b ..., which engage with shafts 4a, 4a of the tray bottom plate 4. An elongated hole 1f through which the protrusion 3c of the slider 3 is inserted and a groove 1g for mounting the tray panel 2 as an exterior component are provided.

The T-shaped protrusions 1c, 1c, ... And the two-mode detection switch 11 which engage with the T-shaped guide grooves 3e, 3e, ... Of the slider 3 and slidably support the slider 3 are operated on the tray 1. A shaft 1e that rotatably supports the protrusion 1d and the lock arm 13 is provided.

The slider 3 is made by attaching resin to a sheet metal processed product by outsert molding, and the slanted guide grooves 3 a, 3 a ... Through which the shafts 4 a, 4 a of the tray bottom plate 4 are inserted and the T-shaped of the tray 1. T-shaped guide grooves 3e, 3e ... Engaging with the protrusions 1c, 1c ... Are provided and these grooves are covered with resin.

The tray bottom plate 4 is made of resin, and the shafts 4a, 4a ... Provided on the tray bottom plate 4 engage with the guide grooves 3a, 3a ... Of the slider 3 and the vertical grooves 1b, 1b. It is supported by the tray 1 and the slider 3.

The compact cassette 17 is placed on the tray bottom plate 4, and guides 4b and 4b for interfering with the tape-side protrusion 17a of the compact cassette 17 are provided on the front inner surfaces 4c and 4c thereof.

In order to assemble the tray 1, the slider 3 and the tray bottom plate 4 into the chassis 12, first, the tray bottom plate 4 is deformed by the shafts 4a, 4a of the tray bottom plate 4 into the guide grooves 3a, 3a of the slider 3. , And then the shafts 4a, 4a ... Are engaged with the longitudinal grooves 1b, 1b ... of the tray 1 so that the T-shaped projections 1c, 1c ... of the tray 1 are inserted into the T-shaped guide grooves 3e, 3e. It is carried out by sliding the sliders through the branching parts to engage the grooves 1a, 1a of the tray 1 with the chassis 12 in a slidable manner with the three parts assembled.

The clamper 14 is rotatably supported by the hole 12c of the chassis 12 and the hook 12b via shafts 14a, 14a provided therein, and is rotated clockwise by a tension coil spring 15 hung between a spring hook 12d. Is urged by.

Leaf springs 16 and 16 are attached to the front lower surface of the clamper 14, and ribs 14 b provided on the rear lower surface of the clamper 14 project to the movement path of the protrusion 3 g of the slider 3 and The rearward movement causes the clamper 14 to rotate clockwise, and the leaf springs 16 and 16 press the upper surface of the compact cassette 17.

The lever 6 is rotatably supported in the holes 12f, 12f of the chassis 12 via shafts 6a, 6a provided therein, and is rotated clockwise by a tension coil spring 5 hung between the lever 6 and a spring hook 12e. Being energized.

Cassette retainers 6b, 6b are provided above the lever 6, and when the slider 3 is moving leftward (the direction protruding from the panel), the tongue piece 6c at the upper left of the lever 6 is a slider. Although the lever 6 is pushed counterclockwise by the lower end 3d of the cassette 3 and the cassette holders 6b and 6b are separated from the compact cassette 17, when the slider 3 moves to the right, the elasticity of the tension coil spring 5 is increased. As a result, the lever 6 rotates clockwise and the cassette holders 6b, 6b hold the end surface of the compact cassette 17.

The upper protrusion 13 a of the lock arm 13 rotatably supported on the tray 1 by the shaft 1 e and the screw engages with the J-shaped guide groove 12 a of the chassis 12, and the lower protrusion 13 b has an inverted J shape of the slider 3. It engages with the shape-shaped guide groove 3f.

The two-mode detection switch 11 fastened to the chassis 12 is actuated by the protrusion 3c of the slider 3 at the end of the rightward movement stroke of the slider 3, and is moved to the tray 1 at the end of the leftward movement stroke of the slider 3. It operates by the protrusion 1d.

The mechanical deck 7 for playing and playing the tape is fastened to the chassis 12 from below with screws.

The motor 8 is fastened to the chassis 12, and the drive gear 9 is rotatably supported in the hole 12g of the chassis 12. A belt 10 is hung between the pulley of the drive gear 9 and the pulley of the rotary shaft of the motor 8, and the gear 9 a of the drive gear 9 meshes with the rack 3 b provided on the slider 3.

FIG. 3 shows a state in which the drive gear 9 is mounted on the chassis 12. The gear 9a of the drive gear 9 is passed through the large diameter portion of the hole 12g of the chassis 12 and then pushed into the small diameter portion. At this time, holes 12h and 12 are provided in the vicinity thereof so that the narrowed portion of the hole 12g is easily deformed.

The tongue piece 12i provided on the chassis 12 is deformed and passes through the projection 9c of the drive gear 9, and the projection 12c is supported by the recess 12j. In this way, the drive gear 9 is slidably supported by the chassis 12 on the cylindrical surface 9b and the protrusion 9c. Then, the belt 10 pulls the hole 12g toward the small-diameter portion to keep the hole 12g in a stable state.

FIG. 4 shows a modification of the hole that supports the rotating shaft. As shown in FIG. 4A, only one large hole may be provided as a hole provided in the vicinity of the narrowed portion. Further, as shown in FIGS. 4B and 4C, notches may be provided in place of the small diameter portion or the large diameter portion.

Next, the operation of the recording medium conveying apparatus of the embodiment will be described with reference to FIGS. FIG. 5 shows a state in which the tray 1, the slider 3, and the tray bottom plate 4 are projected from the housing, that is, a state in which the cassette discharge process is completed. In this state, the protrusion 1d of the tray 1 pushes the two-mode detection switch 11 forward, and the cassette discharge completion state is detected.

The upper protrusion 13 a of the lock arm 13 engages with the vertical groove portion of the J-shaped guide groove 12 a of the chassis 12, and the lower protrusion 13 b engages with the lateral groove portion of the inverted J-shaped guide groove 3 f of the slider 3. ing. Therefore, the lock arm 13 is restricted by the guide groove 12a of the chassis and does not rotate, and locks the tray 1 and the slider 3 so that the lock arm 13 can move with respect to the chassis 12.

In this state, the tray 1 and the slider 3 are integrally moved to the rear by the rotation of the motor 8 in the cassette mounting direction. FIG. 6 shows a state immediately before the upper protrusion 13a of the lock arm 13 enters the lateral groove of the J-shaped guide groove 12a of the chassis 12.

When the lock arm 13 is rotated clockwise by being guided by the J-shaped guide groove 12 a, the upper protrusion 13 a of the lock arm 13 engages with the lateral groove portion of the J-shaped guide groove 12 a of the chassis 12, and The side protrusion 13b comes to engage with the vertical groove portion of the inverted J-shaped guide groove 3f of the slider 3. Then, the tray 1 is locked and only the slider 3 can move.

FIG. 7 shows a state in which the slider 3 is moved to the rear end, that is, a state in which the cassette mounting process is completed. In this state, the protrusion 3c of the slider 3 pushes the two-mode detection switch 11 rearward, and the cassette mounting completion state is detected.

8 to 10 are side views corresponding to FIGS. 5 to 7, respectively. The tray bottom plate 4 is on the upper side while the tray 1 and the slider 3 are integrally moved backward, but when only the slider 3 is moved backward, the tray bottom plate 4 is guided by the guide grooves 3a, 3a. The cassette lowered and placed on the tray bottom plate 4 is mounted on the mechanical deck.

Further, as the tray bottom plate 4 descends, the clamper 14 rotates counterclockwise and pushes the upper surface of the cassette. Although the lever 6 is not shown, it is rotated at the end of the rearward movement of the slider 3 so that the cassette holders 6b, 6b press the front end surface of the compact cassette 17.

FIG. 11 shows a state in which erroneous mounting is prevented when the compact cassette 17 is inserted in the reverse direction. If the compact cassette 17 is inserted in the opposite direction, the tape-side projection 17a of the compact cassette 17 hits the guides 4b, 4b and rises up, so that the erroneous insertion can be known.

Even when the protrusion 17a is forcibly inserted so as to cross over the guides 4b and 4b, as shown in FIG. 11B, the dimension A protruding from the tray upper surface of the compact cassette 17 is regarded as the tray upper surface. Since it is larger than the gap B between the sub-panel and the sub-panel, the compact cassette 17 is not pulled into the panel.

[0046]

[Effect of the device]

 According to the recording medium conveying device of the magnetic recording / reproducing apparatus of the present invention, the end of each process of mounting the recording medium and ejecting the recording medium is detected by one switch, so that the number of parts, assembling man-hours and wiring man-hours are reduced. ..

When the T-shaped protrusion provided on the tray is to be engaged with the T-shaped guide groove covered with the resin of the slider, the T-shaped protrusion can be assembled by inserting it from the branch portion of the T-shaped guide groove. This is possible, and no extra parts are required for the sliding part, reducing the number of parts and the number of assembly steps. Further, since the sliding contact of the relative movement of the tray and the slider is made on the surface of the resin, the frictional resistance is small and the noise is not generated.

Further, when the tray bottom plate is provided with a guide for interfering with the tape-side protrusion on the side surface of the compact cassette, if the compact cassette is inserted into the tray in the wrong direction, the compact cassette floats up, and it is possible to know the incorrect insertion. ..

According to the rotary shaft mounting structure of the present invention, the rotary shaft can be assembled by pushing the rotary shaft into the circular arc portion having the small diameter while deforming the narrowed portion of the rotary shaft support member, and the parts other than the rotary shaft support member can be assembled. It is not necessary, and the number of parts and the number of assembly steps are reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a recording medium transporting device of a magnetic recording / reproducing apparatus according to an embodiment of the present invention together with FIG.

FIG. 2 is an exploded perspective view showing the recording medium conveyance device together with FIG.

FIG. 3 (a) is an exploded perspective view showing a rotary shaft mounting structure in the recording medium conveying device, and FIG. 3 (b) is a sectional view showing the rotary shaft mounting structure.

FIG. 4 is a side view showing a modified example of the rotary shaft mounting structure.

FIG. 5 is a plan view showing each component of the recording medium conveyance device in a transparent manner.

FIG. 6 is a plan view showing a state in which some of the components have moved from the state shown in FIG. 5 of the recording medium conveyance device.

FIG. 7 is a plan view showing a state in which some of the components have further moved from the state shown in FIG. 6 of the recording medium conveyance device.

FIG. 8 is a side view showing each component of the recording medium conveyance device in a see-through manner.

FIG. 9 is a side view showing a state in which some of the components have moved from the state shown in FIG. 8 of the recording medium conveyance device.

FIG. 10 is a side view showing a state in which some of the parts have moved from the state shown in FIG. 9 of the recording medium conveyance device.

11A is a plan view showing a part of the recording medium transport device, FIG. 11B is a side view thereof, and FIG. 11C is a front view thereof.

FIG. 12 is an exploded perspective view showing an example of a conventional recording medium carrying device.

FIG. 13 is an exploded perspective view showing an example of a conventional rotary shaft mounting structure.

[Explanation of symbols]

 1 Tray 2 Tray Panel 3 Slider 4 Tray Bottom Plate 5 Tension Coil Spring 6 Lever 7 Mechanical Deck 8 Motor 9 Drive Gear 10 Belt 11 2 Mode Detection Switch 12 Chassis 13 Lock Arm 14 Clamper 15 Tension Coil Spring 16 Leaf Spring 17 Compact Cassette

Claims (4)

[Scope of utility model registration request] 1. A tray supported horizontally by a chassis, a tray bottom plate vertically supported by the tray, and a slider vertically supported by the tray for vertically moving the tray bottom plate by the horizontal movement. , A combination of a slider and a tray or a chassis and a tray depending on the rotation position of the chassis and the slider, which have protrusions that are rotatably supported by the tray and engage with the J-shaped guide grooves of the chassis and the slider that are curved in opposite directions. In a recording medium transporting device of a magnetic recording / reproducing apparatus in which a slider is horizontally driven to pull in a recording medium into a housing and mount it on a mechanical deck, a lock arm for locking the recording medium The end of the stroke is detected by a two-mode detection switch, and the two-mode detection switch is provided by a protrusion provided on the tray and the slider. A recording medium transport device configured to be activated. 2. The slider is formed by outsert molding, the sliding surface of the tray or the tray bottom plate with the projection is covered with resin, and the T-shaped projection provided on the tray and the T-shaped guide groove provided on the slider are engaged with each other. The recording medium carrying device according to claim 1. 3. A guide for interfering with a tape-side protrusion on a side surface of the compact cassette is provided on the tray bottom plate.
Recording medium conveying device. 4. A rotary shaft supporting member is provided with a hole in which an arc portion fitted to a side surface of the rotary shaft and an arc portion having a larger diameter are connected by a narrowed portion, and a hole or notch is provided in the vicinity of the narrowed portion. A rotary shaft mounting structure in which a narrowed portion is provided so as to be elastically deformable, and an elastically deformable tongue piece having a recess that engages with a protrusion at the tip of the rotary shaft is provided on the rotary shaft support member.