JPH06101170B2 - Magnetic tape recording / playback 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 tape recording / reproducing apparatus configured so that tape cassettes having different sizes can be mounted.

[Conventional technology]

Japanese Unexamined Patent Publication No. 1-125752 discloses a pair of tape loading members, namely, a tape loading member for mounting a small tape cassette smaller than a standard type tape cassette on a magnetic tape recording / reproducing apparatus without using an adapter for magnetic recording / reproducing. The pair of guide grooves for guiding the movement of the tape loading members on the winding side and the winding side are extended to a position where a small tape cassette smaller than the standard type tape cassette can be mounted, and when the standard type tape cassette is mounted, the pair of tape loading members The first to insert the standard tape cassette
Position, and when the small tape cassette is loaded, the pair of tape loading members are moved to the second position where they are fitted into the small tape cassette, the pair of tape loading members are fitted into the tape cassette, and then the pair of tape loading members are loaded. It is disclosed that a member is moved along a pair of guide grooves and the tape in the tape cassette is wound around the outer periphery of the rotating drum at a predetermined angle for magnetic recording and reproduction.

Further, in FIGS. 8 and 9 of JP-A-62-14363,
A linking mechanism for driving a loading member, which can reduce the number of parts and can be made thin, is disclosed. This link mechanism uses one tape loading member (the pole base 45 of the above publication).
And one of the link members (the arm 44 and the link 46 of the publication) for driving the loading pole 52) and the other link member for driving the other tape loading member (the pole base 49 and the loading pole 53 of the publication). (The arm 48 and the link 50 of the above publication).

[Problems to be solved by the invention]

In the technique disclosed in Japanese Patent Application Laid-Open No. 1-125752, the pair of guide grooves are extended to a position where a small tape cassette smaller than the standard type tape cassette can be mounted. Therefore, the magnetic tape recording dedicated to the standard type tape cassette shown in FIG. As compared with the loading member guide guide grooves 202 and 204 formed in the main chassis 200 of the reproducing apparatus, as shown in FIG. 7, the end portions of the loading member guide guide grooves 302 and 304 formed in the main chassis 300. However, there is a problem that the rigidity of the main chassis 300 deteriorates due to the close proximity to each other.

When the loading member driving link mechanism disclosed in Japanese Patent Laid-Open No. 62-14363 is used in a magnetic tape recording / reproducing apparatus dedicated to a standard type tape cassette, as shown in FIG. One link member made of the link 446 and driving the pole base 445 and the other link member driving the repole base 449 of the arm 448 and the link 450 do not intersect at the time of unloading,
The loading member driving link mechanism disclosed in Japanese Unexamined Patent Publication No. 62-14363 is used for both a standard tape cassette and a small tape cassette having a pair of guide grooves extended as disclosed in Japanese Unexamined Patent Publication No. 1-125752. When applied to a magnetic tape recording / reproducing apparatus, as shown in FIG. 9, since the rotation angles of both link members become large (200 degrees or more), arms 444 and 448 and link 446 during unloading.
And 450 intersect. As a result, the arms and links may collide with each other, and the arms and links must be displaced in the height direction, and a large space must be secured for the movement of these arms and links. turn into.

It is an object of the present invention to provide a magnetic tape recording / reproducing apparatus that solves the above problems.

[Means for solving problems]

The magnetic tape recording / reproducing apparatus according to claim 1, wherein a first tape cassette and a second tape cassette smaller than the first tape cassette are selectively mounted, and a pair of guide grooves for guiding the movement of the pair of tape loading members are provided. Extending to a position where a second tape cassette smaller than the first tape cassette is mounted, and when the first tape cassette is mounted, moving the pair of tape loading members to a first position where the tape loading member is fitted into the first tape cassette; When the second tape cassette is mounted, the pair of tape loading members are moved to the second position where they are inserted into the second tape cassette, and the pair of tape loading members are inserted into the first or second tape cassette, and then the pair of tape loading members are inserted. Inside the first or second tape cassette by moving the tape loading member along the pair of guide grooves. A magnetic tape recording / reproducing apparatus for performing magnetic recording / reproduction by winding a tape around an outer circumference of a rotating drum, comprising a chassis and a link mechanism having a pair of link members for driving a pair of tape loading members, and one link of the link mechanism. The member is arranged on the back side of the chassis, and the other link member of the link mechanism is arranged on the front side of the chassis.

According to another aspect of the magnetic tape recording / reproducing apparatus of the present invention, a guide groove for guiding a loading member driven by one of the link members provided on the back side of the chassis is formed on the chassis, and the guide groove is provided on the front side of the chassis. A guide rail plate is disposed above the other link member, and a guide groove for guiding a loading member driven by the other link member is formed in the guide rail plate.

[Action]

In the magnetic tape recording / reproducing apparatus according to claim 1,
Since the two link members are arranged on the front side and the back side of the chassis, respectively, even when the two link members are largely rotated so as to intersect with each other at the time of unloading, the link members do not collide. Further, it is not necessary to dispose the two link members so as to be displaced from each other in the height (thickness) direction, and it is possible to reduce the thickness. Further, since the dead space due to the pivotal movement of the link member is halved on the front side and the back side of the chassis, other members can be effectively arranged, and the degree of freedom in design is increased.

In the magnetic tape recording / reproducing apparatus according to claim 2,
Only one guide groove is formed on the guide rail plate provided separately from the chassis, and the other guide groove is only formed on the chassis, so the rigidity of the chassis can be greatly improved, and thus the flatness of the chassis can be kept high. It is possible to make it less susceptible to the influence of vibrations of driving means such as a motor.

〔Example〕

1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5 show the construction of an embodiment of a magnetic tape recording / reproducing apparatus according to the present invention.

In FIG. 4, the magnetic tape 2 is pulled out from the small tape cassette 100 or the standard tape cassette 110 to the loading completion position E by the tape loading members 20 and 21 on the supply side and the winding side, and the magnetic tape 2 is rotated within a predetermined angle range on the rotary drum 53. It is shown that it is wound all over.

This pulled out magnetic tape 2 is a small tape cassette
From the supply reel 111 of the 100 or standard tape cassette 110, the tension pole 50, the full-width erasing head 51, the supply tape loading member 20, the impedance roller 52, the rotating drum 53, the winding tape loading member 21, the audio / control head 54. , A predetermined tape path reaching the take-up reel 112 via the capstan 55, the pinch roller 56, and the like.

On the left side (supply side) of the rotating drum 53, a supply side guide groove 7 for guiding the supply side tape loading member 20.
On the right side (winding side), a winding-side thin groove 8 for guiding the winding-side tape loading member 21 is provided. Both of these guide grooves 7 and 8 are extended to the small tape cassette 100 side corresponding to the mounting position of the standard type tape cassette 110 and the mounting position of the small tape cassette 110.

Here, the mounting structure of the tape loading members 20 and 21 on the supply side and the winding side will be described in detail with reference to FIGS. 1 to 3.

As shown in FIG. 1, the supply side guide groove 7 is directly formed in the chassis 4. Feed tape loading member 20
Is a pole base 20a provided with a loading guide pin (not shown) on the bottom side fitted in the guide groove 7 so as to be movable along the guide groove 7, a guide roller 20b standing upright from the pole base 20a, and a pole. It has an inclined pole 20c that inclines and projects from the base 20a. The supply-side tape loading member 20 is driven by the link member 30 and moves to a first unloading position (not shown) that fits into the standard type tape cassette 110 when the standard type tape cassette 110 is loaded. When the small tape cassette 100 is loaded, the small tape cassette 100 is moved to a second unloading position in which the small tape cassette 100 is fitted (for the first and second unloading positions, see Japanese Patent Laid-Open No. 125752). .

The link member 30 is an arm whose one end is fixed to the shaft of the gear 32.
34 and a link 36, one end of which is connected to the other end of the arm 34 via a shaft and the other end of which is fixed to the pole base 20a by a pin or the like (not shown). The link member 30 is attached to the back side of the chassis 4.

A guide rail plate 12 is mounted on the front side of the chassis 4, that is, on the right side of the rotary drum mounting opening 5 of the chassis 4. The guide rail plate 12 is formed with a winding-side guide groove 8 for guiding the tape winding-side tape loading member 21.

The guide groove 8 is formed to be longer than the guide groove 7 as shown in FIG. Guide rail plate 12 is bolt 25
holes 27 in chassis 4 by a, 25b, 25c, 25d and 25e
It is screwed to a, 27b, 27c, 27d and 27e. The winding-side tape loading member 21 includes a pole base 21a provided with a bottom loading guide pin 21d fitted in the guide groove 8 so as to be movable along the guide groove 8, and a guide roller standing upright from the pole base 21a. 21b and pole base
It has an inclined pole 21c which inclines and projects from 21a.

The winding-side tape loading member 21 is driven by the link member 31 and moves to a first unloading position (not shown) that fits into the standard type tape cassette 110 when the standard type tape cassette 110 is loaded. When the small tape cassette 100 is mounted, the small tape cassette 100 moves to a second unloading position (not shown) in which the small tape cassette 100 is fitted.

The link member 31 has an arm whose one end is fixed to the shaft of the gear 33.
38, and a link 40, one end of which is connected to the other end of the arm 38 via a shaft and the other end of which is fixed to the loading base 21a by a pin 37. The link member 31 is arranged on the front side of the chassis 4, that is, between the chassis 4 and the guide rail plate 12. The gear 33 that drives the link member 31 penetrates the opening 40 formed in the chassis 4 and penetrates the back side of the chassis 4, and meshes with the gear 32 that drives the link member 30.

FIG. 5 shows a mechanism for driving the gear 33.

The rotation of the pulley 62 fixed to the motor 61 is transmitted to the pulley 64 via the belt 63. Since the worm gear 65 is coaxially fixed to the pulley 64, its rotation is worm gear 65.
65, the worm wheel 66, and the gears 67, 68. A gear 70 is coaxially fixed to the gear 68, and its rotation is transmitted to the gear 69 via the gear 70. Since the cam plate 71 having the cam 71a is coaxially fixed to the gear 69, the gear 69
The cam plate 71 rotates in association with the rotation of the.

Since the pin 72 of the lever 74 is fitted into the cam 71a,
The lever 74 rotates about the pin 73 in conjunction with the rotation of the cam 71a. A lever 76 is rotatably supported on the lever 74 via a pin 75, and a spring 77 is provided between the levers 74 and 76.

Gears 74a and 76a are formed at the tips of the levers 74 and 76, respectively.
It meshes with the gear 33. Therefore, the rotation of the levers 74 and 76 causes the gear 33 to rotate, and further, the small-diameter gear 33a and the large-diameter gear 33b that are formed coaxially with the gear 33 rotate.

Next, the operation of the embodiment of the magnetic tape recording / reproducing apparatus configured as described above will be described.

At the time of tape loading, the loading arm gear rotates clockwise, the gear 33 rotates counterclockwise, and the gear 32 meshing with this rotates clockwise. The arm 34 rotates clockwise together with the gear 32, and the pole base 20a is pushed by the link 36 and moves in the direction of taking off from the tape cassette along the guide groove 7 of the chassis 4. On the other hand, gear
The arm 38 rotates in the counterclockwise direction together with 33, and the pole base 21a is pushed by the link 40 and moves in the direction of taking off from the tape cassette along the guide groove 8 of the guide rail 12. Finally, the pole bases 20a and 2 shown in FIG.
1a is moved to the rope loading completion position.

The tape loading members 20 and 21 pull out the magnetic tape 2 from the cassette loaded by the above-mentioned moving operation,
The above-mentioned magnetic tape 2 forms a predetermined tape path wound around a rotary drum having a rotary magnetic head at a predetermined angle. In this state, the magnetic tape 2 is a pinch roller
It is pinched and driven by the 55 and the capstan 56 and travels in the forward direction or the reverse direction to perform a recording or reproducing operation.

As described above, in the embodiment shown in FIGS. 1, 2, 3, 4, and 5, the link members 30 and 31 are arranged on the back side and the front side of the chassis 4, respectively. The two link members 30 and 31 during unloading.
Even if they are rotated so as to intersect each other, these link members 30 and 31 do not collide.

Further, it is not necessary to dispose the two link members 30 and 31 on the back side of the chassis 4, for example, so that the link members 30 and 31 can be thinned.

In addition, since the dead space is reduced to half on the front side and the back side of the chassis 4 compared to disposing the link member only on the back side of the chassis 4, other members can be effectively arranged,
Greater freedom of design.

Furthermore, since only one guide groove 7 is formed in the chassis 4, the rigidity and flatness of the chassis 4 can be increased.

〔The invention's effect〕

According to the magnetic tape recording / reproducing apparatus of claim 1, 2
There is no risk of the two link members colliding, making it possible to reduce the device thickness and reducing the dead space by half.
Greater freedom of design.

According to the magnetic tape recording / reproducing apparatus of the second aspect, the rigidity and the plan view of the chassis can be enhanced, and the influence of the vibration of the driving means such as the motor is reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the construction of an embodiment of a magnetic tape recording / reproducing apparatus according to the present invention, and FIG. 2 is a front view showing the embodiment shown in FIG. 1 as seen from the front panel side, FIG. 3 is an exploded front view showing the constituent elements of the embodiment shown in FIG. 2 in an exploded manner, and FIG. 4 is a plan view showing the overall construction of an embodiment of the magnetic tape recording / reproducing apparatus of the present invention. , Fifth
FIG. 6 is a plan view showing the construction of an embodiment of a mechanism for driving the pole base of the present invention, and FIG. 6 is a guide for loading member formed on the chassis of a conventional standard tape cassette magnetic tape recording / reproducing apparatus. Plan view showing the groove, No. 7
FIG. 8 is a plan view showing a guide groove for guiding a loading member formed in a chassis of a conventional magnetic tape recording / reproducing apparatus for both a standard type and a small-sized tape cassette, and FIG. 8 shows a conventional loading member driving link mechanism as a standard type tape. FIG. 9 is an explanatory view showing a relationship between a pair of link members when used in a magnetic tape recording / reproducing apparatus dedicated to a cassette, and FIG. 9 is a standard structure in which a conventional loading member driving link mechanism is extended with another conventional pair of guide grooves. FIG. 3 is an explanatory diagram showing a relationship between a pair of link members when applied to a small tape cassette dual-use magnetic tape recording / reproducing apparatus. 4 ... Chassis, 7 ... Guide groove, 12 ... Guide rail plate, 18 ... Guide groove, 20, 21 ... Tape loading member, 20a, 21a ... Pole base, 20b, 21b ... Guide roller, 20c , 21c …… Loading pole, 21d …… Loading guide pin, 30, 31 …… Link member, 34, 38…
… Arms, 36, 40… Links, 32, 33… Gears.

Claims (2)

[Claims] 1. A first tape cassette and a second tape cassette smaller than the first tape cassette are selectively mounted, and a pair of guide grooves for guiding movement of a pair of tape loading members are smaller than the first tape cassette. When the first tape cassette is loaded, the pair of tape loading members are extended to a position where the second tape cassette is loaded, and the pair of tape loading members are moved to a first position where the tape loading member is fitted into the first tape cassette. When the two tape cassettes are loaded, the pair of tape loading members are moved to the second position where they are fitted into the second tape cassette, and the pair of tape loading members are fitted into the first or second tape cassette. Then, the pair of tape loading members are moved along the pair of guide grooves to move the first tape loading member to the first guide groove. In a magnetic tape recording / reproducing apparatus for magnetically recording / reproducing by winding a tape in a second tape cassette around an outer circumference of a rotating drum, a chassis and a link mechanism having a pair of link members for driving the pair of tape loading members. A magnetic tape recording / reproducing apparatus, characterized in that one link member of the link mechanism is disposed on the back side of the chassis, and the other link member of the link mechanism is disposed on the front side of the chassis. 2. A guide groove for guiding a loading member driven by the one link member arranged on the back side of the chassis is formed in the chassis, and the other link arranged on the front side of the chassis. The magnetic tape according to claim 1, wherein a guide rail plate is disposed above the member, and a guide groove for guiding a loading member driven by the other link member is formed in the guide rail plate. Recording / playback device.