JPH0725889Y2 - Magnetic recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a magnetic recording / reproducing apparatus which can be thinned.

2. Description of the Related Art Recently, a magnetic recording / reproducing apparatus (digital audio tape recorder, etc.) that uses a magnetic tape as a recording medium, converts an analog signal such as an audio signal into a digital signal, and then records / reproduces the signal. Further, this type of magnetic recording / reproducing apparatus is roughly composed of a rotating drum, a tape cassette loading / unloading mechanism, a tape loading mechanism, a capstan motor, a reel motor, and various control means for controlling the operation of each of the above mechanisms / devices. Has been done.

In the conventional magnetic recording / reproducing apparatus, the components of the above-mentioned mechanisms / devices are directly mounted on the chassis. Further, in the tape cassette loading / unloading mechanism, each member constituting the reel shaft and the tape loading mechanism is projectingly provided on the chassis, and therefore the tape cassette is horizontally moved above the reel shaft to avoid a collision with the chassis. It was configured to operate vertically.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above conventional magnetic recording / reproducing apparatus, since the tape cassette is configured to move in the horizontal direction and then in the vertical direction, a certain height dimension is required above the chassis, and the rotating drum is required. Since the motor part and the main part of the capstan motor are located in the lower part of the chassis, the lower part of the chassis also requires a certain depth dimension. However, there is a problem in that the device cannot be downsized. In addition, it has been attempted to reduce the protruding amount of the rotary drum and the capstan motor to the lower part of the chassis in order to make the device thinner as much as possible, but in this case, the degree of freedom in designing the rotary drum and the capstan motor is reduced. There was a problem that it would be narrowed and the cost of the product would increase.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a magnetic recording / reproducing apparatus which is thinned by providing a tape loading mechanism and a reel motor on a sub chassis that moves up and down with respect to a main chassis. And

Means for Solving the Problems In order to solve the above-mentioned problems, in the present invention, a magnetic tape is pulled out from a mounted tape cassette by a tape loading mechanism, and the magnetic tape is spliced to a rotating drum fixed to a main chassis. In a magnetic recording / reproducing apparatus for performing a recording / reproducing process, a tape cassette loading / unloading mechanism for horizontally moving a tape cassette with respect to a main chassis and transferring it between a predetermined recording / reproducing position and an eject position, and the tape loading mechanism. And a reel motor, and a sub-chassis that moves the tape loading mechanism and the reel motor between a drive position and a retracted position by vertically moving the main chassis by an elevating mechanism and a main chassis. Is formed on the tape, and the tape cassette is An opening that allows vertical movement of the tape loading member and the reel base of the reel motor that form the binding mechanism, and allows horizontal movement of the tape loading member along the main chassis when the magnetic tape is drawn toward the rotating drum. And a section are provided.

By configuring the magnetic recording / reproducing apparatus as described above, by moving the sub-chassis to the retracted position when the tape cassette is mounted, the tape loading member and the reel shaft do not hinder the horizontal movement of the tape cassette. The tape cassette can be loaded into a predetermined recording / reproducing apparatus only by moving the tape cassette in the horizontal direction.
Further, the space in the height direction required for the raising / lowering operation of the sub-chassis can be substantially the same as the space in the height direction originally occupied by the motor part of the rotary drum and the main body part of the capstan motor. Therefore, by providing the sub-chassis, the depth of the magnetic recording / reproducing apparatus below the main chassis does not become large. On the other hand, as described above, the height of the upper portion of the main chassis can be made small because the tape cassette does not move in the vertical direction. Therefore, the height of the entire magnetic recording / reproducing apparatus becomes small, and the apparatus can be made compact and thin.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. First
FIG. 2 and FIG. 2 are a plan view and a side view of essential parts showing a magnetic recording / reproducing apparatus 1 according to an embodiment of the present invention.

The magnetic recording / reproducing apparatus 1 is roughly composed of a main chassis 2, a rotating drum 3, a capstan motor 4, a tape cassette loading / unloading mechanism 5, a drive mechanism 6, a sub chassis 7, a reel motor unit 8,
It is composed of a tape loading mechanism 9, an elevating mechanism 10 and the like.

As shown in FIG. 3, the main chassis 2 is composed of a board portion 2a and side plate portions 2b and 2c provided upright on both sides thereof. A rotating drum 3, a capstan motor 4, a tape cassette loading / unloading mechanism 5, a drive mechanism 6 and the like are arranged on the substrate portion 2a. For this reason, a mounting hole 11 for mounting the rotary drum 3 and an insertion hole 12 through which the capstan shaft 4a of the capstan motor 4 is inserted are formed in the substrate portion 2a. In addition to these holes 11 and 12, the board portion 2a has reel stand openings 13, post base openings 15 and 16, pinch roller openings 17 and positioning post holes 18 and 19, and the like. Has been formed. On the other hand, a pair of vertically extending guide grooves 20a, 20b, 21a, 21b are formed in the side plate portions 2b, 2c, respectively (see FIG. 2). Incidentally, the openings 13 to 17 and the holes 18, 1 described above.
Item 9 will be described later in detail for convenience of description. Further, in FIG. 3, only the openings and holes which are the main parts of the present invention are shown and the holes other than the main parts are not shown.

The rotary drum 3 is attached to the magnetic tape pulled out from the tape cassette 22 and performs recording / reproduction processing as the tape runs, and is fixed to the main chassis 2 as described above. At this time, the rotary drum 3 is attached to the lower portion of the main chassis 2 with a part thereof protruding. Similarly, the capstan motor 4 is also attached to the lower portion of the main chassis 2 in a protruding state (the amount of protrusion to the lower portion of the main chassis 2 is hereinafter referred to as the protrusion depth).

The tape cassette loading / unloading mechanism 5 has a cassette carriage 23 into which the tape cassette 22 is inserted and loaded, and by moving this cassette carriage 23, the tape cassette
22 is transferred between the eject position (the position where the tape cassette is inserted into and removed from the cassette carriage 23) and the recording / reproducing position (the position where the magnetic tape is pulled out from the tape cassette 22 and the recording / reproducing process is performed). The tape cassette loading / unloading mechanism 5 is characterized in that the cassette carriage 23 (that is, the tape cassette 22) is only horizontally moved with respect to the main chassis 2. Therefore, the height of the entire mechanism is smaller than that of the conventional tape cassette loading / unloading mechanism in which the tape cassette is moved horizontally and then vertically. It was possible to reduce the height dimension of.

The tape cassette loading / unloading mechanism 5 is driven by a driving mechanism 6. As shown in FIG. 4, the drive mechanism 5 is composed of a motor 24, a gear train 25, a cam gear 26, a lifting lever 27, a slide plate 28 and the like. The driving force of the motor 24 is transmitted to the cam gear 26 via the gear train 25,
26 rotates. A cam groove 29 is formed in the cam gear 26, and a driven pin 30 planted in the elevating lever 27 is engaged with the cam groove 29. The lifting lever 27 is the main chassis 2
It is rotatably supported by a support shaft 31 that is planted in the shaft, so that as the cam gear 26 rotates, the elevating lever 27 rotates about the support shaft 31.

The slide plate 28 is mounted on the main chassis 2 so as to be slidable in the A ₁ and A ₂ directions, and engaging pins 32 and 33 are planted near both ends. A of these pins
_The engagement pin 32 provided at the end in the _one direction engages with the U-shaped groove 34 formed in the elevating lever 27, and the engagement pin 33 formed at the end in the A ₂ direction serves as a lift cam described later. Plate 35
Is engaged with the lever portion 36 of the. Therefore, when the cam gear 26 rotates and the elevating lever 27 slides, the slide plate 28 moves in the A ₁ and A ₂ directions, and the lever portion 36 moves via the engagement pin 33.

The lever member indicated by 37 and the plate member indicated by 38 in the drawing are members for driving the cassette carriage 23,
This is also configured to be driven according to the rotation of the cam gear 26.

Next, the sub-chassis 7 which is the main part of the present invention will be described. The sub-chassis 7 has a structure in which a metal plate-like material is bent and formed in a U shape as shown in FIG. 5, and the arm portions 39a, 39b, 40a, 40b that are bent and extend upward are Guide pins 41a, 41b, 42a, 42b projecting inward are planted.

The sub chassis 7 is provided with a reel motor unit 8, a tape loading mechanism 9, positioning poles 43, 44, identification hole detection switches 45, 46, etc. The reel motor unit 8 is a unit of a supply-side motor, a winding-side motor, a reel brake, a rotation detecting device, etc., and its main body portion 8a is thin. The reel units 47 and 48 on the supply side and the winding side project from the main body portion 8a. Further, identification hole detection switches 45, 46 are arranged at predetermined positions on the main body portion 8a.

The tape loading mechanism 9 has loading posts 49, 5
It has a pair of post bases 53 and 54 in which 0 and inclined poles 51 and 52 are respectively arranged, a pinch roller base 57 in which a pinch roller 55 and a guide post 56 are provided, and the like. Each of these bases 53, 54, 57 is connected to a cam plate 58 arranged on the back side of the sub chassis 7, and the tape loading operation is performed by the sliding operation of the cam plate 58. .

As shown in FIGS. 1 and 2, the sub-chassis 7 has guide pins 41a, 41b, 42a, 42b formed in the side plate portions 2b, 2c of the main chassis 2 in the guide grooves 20a, 20b, 21a, 21b. It is attached to the main chassis 2 by engaging with.
Further, since the guide grooves 20a, 20b, 21a, 21b extend in the vertical direction, the sub-chassis 7 moves in the vertical direction with respect to the main chassis 2 along each guide groove 20a, 20b, 21a, 21b (in FIG. 2, B ₁ , B ₂
Direction). A lifting mechanism 10 lifts and lowers the sub chassis 7 with respect to the main chassis 2.

The elevating mechanism 10 is roughly the drive mechanism 6 (fourth
(See the drawing) and the lift cam plate 35. The lift cam plate 35 is formed by bending a metal plate-like material, and as shown in FIG. 6, the base plate portion 35a and the side plate portions 35b, 35c.
And are formed. A lever portion 36 extending in the A ₁ direction is formed at a position near the side plate portion 35b of the substrate portion 35a.
Further, the side plate portion 35b, inclined grooves 59a of the shape descending obliquely towards the A ₁ direction from A ₂ direction to 35c, 59b, 60a, 60b (inclined groove 60a formed in the side plate portion 35c, 60b do not appear in FIG. ) Has been formed. The lift cam plate 35 having the above structure is the first
As shown in FIGS. 2 and 2, it is mounted on the main chassis 2 so as to be slidable in the directions of arrows A ₁ and A ₂ in the figure. Further, a coil spring (not shown) is arranged between the lift cam plate 35 and the main chassis 2, so that the lift cam plate 35 is always biased in the A ₁ direction.

In addition, the guide pins 41a provided on the sub chassis 7,
41b, 42a, 42b are the inclined grooves 59a, 59b, 6 when installed.
It is also configured to engage with 0a and 60b. Therefore, when the lift cam plate 35 slides in the A ₁ direction, the sub chassis 7 moves upward in the B ₂ direction, and conversely, when the lift cam plate 35 slides in the A ₂ direction, the sub chassis 7 moves downward in the B ₁ direction.

On the other hand, the lever portion formed on the lift cam plate 35
36 is the drive mechanism 6 as described above with reference to FIG.
Is engaged with the engagement pin 33 of the slide plate 28 constituting the. Therefore, the drive mechanism 9 operates and the engagement pin 33 moves the A ₁ and A ₂
By being displaced in the direction, the lift cam plate 35 follows this and slides in the A ₁ and A ₂ directions, so that the sub chassis 7 moves up and down with respect to the main chassis 2. Further, as described with reference to FIG. 3, the main chassis 2 includes reel stands 47, 48,
Openings 13 to 17 and holes 18, 1 corresponding to each base 53, 54, 57 etc.
9 is formed, the positioning poles 43, 44, loading posts 49, 5 are moved by the sub chassis 7 moving upward.
0, Inclined pole 51, 52, Pinch roller 55, Guide post 56
(These members are collectively referred to as a tape loading member) and the reel stands 47 and 48 project above the main chassis 2. When the sub chassis 7 reaches the upper limit position,
Each member arranged on the sub-chassis 7 has a predetermined position (a position where tape loading can be performed, hereinafter referred to as a drive position)
Is configured to be positioned at.

Further, as described with reference to FIG. 5, the sub chassis 7
The tape loading mechanism 9 disposed in the above performs a tape loading operation by driving the cam plate 58. The cam plate 58 is configured to be driven after the sub-chassis 7 reaches the upward movement position. (Specifically, it is driven by the cam gear 26). When attention is paid to the openings 15 to 17 formed in the main chassis 2 (see FIGS. 1 and 3), the openings 15 to 17 are simply the bases 53 and 54, respectively.
57. The post base openings 15 and 16 have guide grooves 15a and 16a that extend to both sides of the rotary drum 3, and the pinch roller opening 17 is The shape is extended to the vicinity of the capstan shaft 4a.

Therefore, when the sub-chassis 7 moves upward and the cam plate 58 is driven, the post bases 53 and 54 perform the loading operation along the guide groove portions 15a and 16a, and the pinch roller base 57 extends the pinch roller which extends long. The pinch roller 55 contacts the capstan shaft 4a by moving in the opening 17 for use. A state in which each of the bases 53, 54, 57 has moved to the loading completion position is shown by a chain line in FIG.

As described above, the openings 13 to 17 and the holes 18 and 19 not only allow the reel bases 47 and 48 and the tape loading member to move vertically as the sub-chassis 7 moves up and down, but also move the sub-chassis 7 upward. When the tape loading mechanism 9 is in its position, the bases 53, 54 and 57 are mounted on the main chassis 2
It is also configured to be capable of horizontal movement along the. Therefore, even if the tape loading mechanism 9 is provided on the sub-chassis 7, no inconvenience occurs and a smooth tape loading operation can be performed.

Next, the operation of the magnetic recording / reproducing apparatus 1 having the above configuration will be described.

1 and 2 show the magnetic recording / reproducing apparatus 1 in the ejecting state. At this time, the cassette carriage 23 is in the eject state displaced in the A ₂ direction. Also,
The lift cam plate 35 is also in a position displaced in the A ₂ direction by the drive mechanism 6 (showing the drive mechanism 6 in the eject state in FIG. 7), and the reel bases 47, 48 and the tape loading member do not interfere with the cassette loading. It is positioned at (the retracted position). Therefore, the sub-chassis 7 is in the down position as shown in FIG. At this time, the dimension in which the sub chassis 7 is separated from the main chassis 2 is approximately the same as the projection depth in which the rotary drum 3 and the capstan motor 4 project below the main chassis 2. Therefore, even if the sub-chassis 7 is moved up and down, the lower dimension of the main chassis 2 of the magnetic recording / reproducing apparatus 1 does not become large, and the dimension may be substantially the same as that of the conventional magnetic recording / reproducing apparatus. it can. On the other hand, since the sub chassis 7 is moved up and down with respect to the main chassis 2 as described above, the cassette loading of the tape cassette 22 can be performed only in the horizontal direction, so that the height dimension above the main chassis 2 is reduced. There is. For this reason,
The height of the magnetic recording / reproducing apparatus 1 as a whole can be reduced, and the apparatus can be made smaller and thinner.

When the tape cassette 22 is inserted into the cassette carriage 23 at the eject position, the drive mechanism 6 starts and the cam gear 26 rotates in the C ₁ direction (see FIG. 7). When the cam gear 26 rotates, the tape cassette loading / unloading mechanism 5 first operates, and the cassette carriage 23 moves horizontally in the A ₁ direction relative to the main chassis 2 to move the tape cassette.
22 is transferred to a predetermined recording / reproducing position.

When the tape cassette 22 is mounted at the recording / reproducing position, the elevating mechanism 10 subsequently operates and the sub chassis 7 moves upward. At this time, the drive mechanism 6, as shown in FIG.
The lifting lever 27 is rotated counterclockwise with the rotation of the.
Thus the slide plate 28 is displaced in the A ₁ direction, the lift cam plate 35 is always biased to the A ₁ direction, the slide operation to the A ₁ direction due to the engagement pin 33 moves A ₁ direction To do. Therefore, as described above, the lift cam plate
The operation of 35 causes the sub-chassis 7 to move upward and the reel stand 47,4.
8 and the tape loading member are positioned in the drive position. This state is shown in FIG. In this state, the reel stands 47, 48 are fitted in the hub holes of the tape cassette 22, and the tape loading members such as the loading posts 49, 50 are inserted inside the magnetic tape of the tape cassette 22.

When the reel bases 47, 48 and the tape loading member are positioned at the drive positions as described above, the tape loading mechanism 9 (see FIG. 5) is subsequently operated, and the post bases 53, 5 are activated.
4 moves along the guide groove portions 15a, 16a, and the pinch roller base 57 also moves in the pinch roller opening 17 toward the capstan shaft 4a, so that the magnetic tape is a tape cassette.
It is pulled out from 22 to form a predetermined tape path. In this state, the magnetic tape runs and the rotary drum 3 performs magnetic recording / reproducing processing and the like.

The operation of each component when returning from the recording / reproducing state shown in FIG. 9 to the eject position shown in FIGS. 1 and 2 is the reverse of the operation described above, and therefore its explanation is omitted. .

As described above, according to the present invention, the sub-chassis that moves up and down with respect to the main chassis is provided, and the reel motor and the tape loading mechanism are provided in the sub-chassis so that the cassette loading operation of the tape cassette can be performed only in the horizontal direction. Therefore, the height required above the main chassis can be reduced, and the sub-chassis raising and lowering operation range at the bottom of the main chassis is almost the same as the protrusion depth of the rotating drum, etc. It has the features that the height of the can be reduced and the size can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of essential parts of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a side view of essential parts of the magnetic recording / reproducing apparatus shown in FIG. 1, and FIG. 3 is a plan view of a main chassis. , FIG. 4 is a view for explaining a drive mechanism, FIG. 5 is a view for explaining a sub chassis, FIG. 6 is a view for explaining a lift cam plate, and FIGS. 7 and 8 are drive. FIG. 9 is a side view of an essential part of the magnetic recording / reproducing apparatus in a state where the sub-chassis is in an upper position for explaining the operation of the mechanism. DESCRIPTION OF SYMBOLS 1 ... Magnetic recording / reproducing apparatus, 2 ... Main chassis, 2a ... Substrate part, 2b, 2c ... Side plate part, 3 ... Rotating drum, 4a ... Capstan shaft, 5 ... Tape cassette loading / unloading mechanism, 6 ... Driving mechanism,
7 ... Sub chassis, 8 ... Reel motor unit, 9 ... Tape loading mechanism, 10 ... Lifting mechanism, 13, 14 ... Reel stand opening, 15, 16 ... Post base opening, 15a, 16a ...
Guide groove portion, 17 ... Pinch roller opening portion, 18, 19 ... Positioning post hole portion, 20a, 20b, 21a, 21b ... Guide groove, 22 ... Tape cassette, 23 ... Cassette carriage, 26 ... Cam gear, 27 ... Lifting lever , 35 ... Lift cam plate, 36 ... Lever part, 41a, 41b, 42a, 42b ... Guide pin, 47, 48 ... Reel stand, 49, 50 ... Loading post, 51, 52 ... Inclined pole,
53, 54 ... Post base, 55 ... Pinch roller, 56 ... Guide post, 57 ... Pinch roller base, 59a, 59b, 60a, 60b ...
Inclined groove.

Claims (1)

[Scope of utility model registration request] 1. A magnetic recording / reproducing apparatus for performing a recording / reproducing process by pulling out a magnetic tape from a mounted tape cassette by a tape loading mechanism and advancing the magnetic tape to a rotating drum fixedly mounted on a main chassis. A tape cassette loading / unloading mechanism for moving the tape cassette only horizontally with respect to the main chassis and transferring it between a predetermined recording / reproducing position and an eject position, the tape loading mechanism and a reel motor are provided. Formed on the main chassis by a sub-chassis that moves the tape loading mechanism and the reel motor between a drive position and a retreat position by moving the tape loading mechanism and the reel motor up and down with respect to the main chassis by an elevating mechanism. Tape loading that constitutes the tape loading mechanism when the sub-chassis is moved up and down An opening for allowing the material and the reel stand of the reel motor to move up and down, and for allowing the tape loading member to move horizontally along the main chassis when the magnetic tape is pulled out toward the rotating drum; A magnetic recording / reproducing apparatus provided with.