JPH01292661A - Loading device for tape recorder - Google Patents

Abstract

PURPOSE:To use a loading motor in common, and in addition, to simplify a switching mechanism by connecting both a cassette loading mechanism and a tape loading mechanism to the loading motor through the switching mechanism. CONSTITUTION:When a driving gear 81 is driven by the loading motor 8, a driven gear 6 and an auxiliary gear 7 connected by a second engaging part are rotated in one body, and cassette loading is started. During the progress of the cassette loading, the mesh point of the driven gear 6 with the driving gear 81 is shifted from one end of a toothed part 61 to the other end, and at the time of the completion of the cassette loading, the mesh of the toothed part 61 and the driving gear 81 is released, and the driven gear 6 stops. At that time, the driven gear 5 and the auxiliary gear 7 are connected to each other by a first engaging part, and start to rotate unitedly, and the toothed part 51 of the driven gear 5 meshes with the driving gear 81, and tape loading is started. During the progress of the tape loading, the mesh point of the driven gear 5 and the driving gear 81 is shifted from one end of the toothed part 51 to the other end, and at time of the completion, the driven gear 5 stops accompanied with the stoppage of the loading motor 8.

Description

[Detailed Description of the Invention] (Field of Industrial Application) Is the present invention applicable to video tape recorders (VTR), etc.? The present invention relates to a loading device installed in a cassette tape type signal recording and reproducing device.

(Prior Art) In a VTR, a cassette loading mechanism transports a tape cassette from cassette 1 to an insertion slot to a predetermined position in the device, and a magnetic tape pulled out from the cassette at the predetermined position is loaded into a predetermined position. Various drive mechanisms are installed, such as a tape loading mechanism that is stretched over the tape running path, and a capstan drive mechanism that transports the magnetic tape along the tape running path. Conventionally, each of these mechanisms has been provided with a drive motor.

(Problems to be Solved) In recent years, there has been an increasing demand for VTRs to be smaller and lighter, and for this purpose, it is effective to reduce the number of drive motors installed in VTRs.

Therefore, it has been proposed to use a capstan motor as the drive motor for the cassette loading mechanism (Japanese Patent Laid-Open No. 61-265768 [G11B15/675]).

However, in the VTR, the switching mechanism for connecting or disconnecting the output shaft of the capstan motor to the cassette loading mechanism is an idler gear that engages and disengages from a drive gear driven by the capstan motor. Since it is composed of a plurality of movable members, such as a link mechanism for reciprocating the idler gear according to the rotational direction of the gear, it not only increases the cost due to an increase in the number of parts, but also makes the assembly process complicated. There was a problem.

(Means for Solving the Problems) An object of the present invention is to be able to switch and drive a cassette loading mechanism and a tape loading mechanism by a common loading motor, and to provide an intervening device between both mechanisms and the loading motor. The object of the present invention is to provide a loading device in which the switching mechanism to be changed has an extremely simple structure, thereby solving the above problem.

In the loading device according to the present invention, a cassette loading machine m (2> and a tape loading mechanism (3)
is the loading motor (8) via the switching mechanism (4)
is connected to.

The switching mechanism (4) includes a driving gear (81) rotationally driven by a loading motor (8>), and toothed portions (51) and (61) each formed over a predetermined angular range and capable of meshing with the driving gear. The driving gear (81) and the toothed portion (51) of the second driven gear include first and second driven gears (5) and (6), and an auxiliary gear (7) that constantly meshes with the driving gear.
Cassette loading is performed by meshing with the driving gear (81) and the toothed portion (61) of the first driven gear.
) Tape loading is performed by engagement with the tape.

The first driven gear (5) and the auxiliary gear (7) are arranged to allow relative rotation of both gears (5) and (7) during cassette loading, and to allow relative rotation of both gears (5) and (7) at the beginning of tape loading.
) and (7) are interposed therein. Furthermore, there is a space between the second driven gear (6) and the auxiliary gear (7) to allow relative rotation of both gears (6) and (7) during tape loading, and to allow relative rotation of both gears (6) and (7) at the beginning of cassette loading. ) and (7) are interposed therein.

(Function) Both cassette loading and tape loading are performed by rotating the loading motor (8) in one direction.

At the start of cassette loading, the driving gear (81) meshes with the toothed portion (61) of the second driven gear (6), and
The toothed portion (51) of the driven gear (5) is set in a disengaged state. When the driving gear 81) is driven by the loading motor (8), this causes the second
The driven gear (6) and the auxiliary gear (7) start rotating, the rotation of the second driven gear (6) is transmitted to the cassette loading mechanism (2), and cassette loading is started.

During the progress of cassette loading, the meshing point of the second driven gear (6) with the driving gear (81) shifts from the - end of the toothed portion (61) to the other end. In this process, the first engaging portion between the first driven gear (5) and the auxiliary gear (7)
7), the first driven gear (5) remains stopped.

When the cassette loading is completed, the second driven gear (6)
The meshing between the toothed portion (61) and the driving gear (81) is released, and the rotation of the second driven gear (6) is stopped.

At this time, the first engaging portion performs an engaging operation as the auxiliary gear (7) rotates, and the first driven gear (5) and the auxiliary gear (7) are connected to each other by the first engaging portion. , starts integral rotation. As a result, the toothed portion (51) of the first driven gear (5) meshes with the driving gear (81).
) drives the first driven gear (5). The rotation of the first driven gear (5) is transmitted to the tape loading mechanism (3), and tape loading is started.

During tape loading, the meshing point between the first driven gear (5) and the driving gear (81) shifts from one end of the toothed portion (51) to the other end I\. In this process, the second engaging portion between the second driven gear (6) and the auxiliary gear (7)
7), the second driven gear (6) remains stopped.

When tape loading is completed, the toothed portion (51) of the first driven gear (5) and the driving gear (81) remain in mesh with each other, but as the loading motor (8) stops, the toothed portion (51) of the first driven gear (5) remains engaged with the driving gear (81).
The driven gear 5) stops rotating.

(Effect of the invention) In the loading device according to the present invention, the driving gear (
81), the first
, the second driven gears (5) and (6) are engaged and disengaged continuously, thereby automatically switching the rotation transmission path from the driving gear (81) to the tape loading mechanism in the cassette loading machine configuration. Because it is done in
Loading motor (8) into the rain gutter! Not only can it be used commonly for (2) and (3), but the switching machine m (4) has a simple configuration consisting of a pair of driven gears (5), (6) and an auxiliary gear (7). Therefore, it is extremely effective in reducing the size and weight of the device.

(Embodiment) FIGS. 1 to 5 show an embodiment of a switching mechanism (4) installed in a loading device according to the present invention. Figures 6 and 7 show the cassette loading mechanism (2).
Fig. 8 shows an example of the configuration of the tape loading mechanism (3).
) shows an example of the configuration.

The configuration and operation of these mechanisms will be explained below.

As shown in FIG. 1, a loading motor (8) is disposed on the chassis (92), and a driving gear (81) is attached to the output shaft of the motor (8).

Further, a first shaft (41) is provided protruding from the chassis (92), and a first driven gear (5), which will be described later, is attached to the shaft (41).
), an auxiliary gear (7), and a second driven gear (6) are each pivotally supported. These gears have the same pitch and diameter.

Further, the chassis (92) includes the first shaft (41).
A second shaft (42) is provided to protrude in parallel with the shirt)
A first pulley gear (43) and a second pulley gear (44) are respectively pivotally supported on (42). Both pulley gears (4
3) Belts (45) and (46) connected to a tape loading mechanism and a cassette loading mechanism, which will be described later, are wound around the pulley portions (44), respectively.

The first driven gear (5) consists of an upper half (5a) and a lower half (5b) as shown in Figures 2A and 2B, and the upper part (5a) has a tooth surface on the entire circumference. A gear portion (53) is formed, and a toothed portion (51) and a toothed portion (52) are formed in the lower half portion (5b), respectively, over a predetermined angular range. Furthermore, an arcuate arm (54) is recessed in the side surface of the lower half (5b) along the toothed portion (51).

The second driven gear (6) consists of an upper half (6a) and a lower half (6b) as shown in FIGS. 3A and 3B, and the upper half (6a) has a predetermined angle. The toothed part (6
1) and a gear arrow part (62) are formed, and a gear part (63) having a tooth surface formed on the entire circumference is formed in the lower half part (6b). Further, an arcuate groove (64) is formed on the side surface of the upper part (6a) along the toothed part (61).

In addition, the auxiliary gear (7) has a tooth surface formed around the entire circumference as shown in FIG. 4A and FIG. , the first drive pin (7
1), the second drive pin (72
) is provided protrudingly.

As shown in Figure 1, the first driven gear (5) has a lower half (5b
) is disposed at a position where it can mesh with the driving gear (81), and the second driven gear (6) is arranged at a position where its upper half (6a) can mesh with the driving gear (81). In the auxiliary gear (7), the first drive pin (71) engages with the groove (54) of the first driven gear (5), and the second drive pin (72) engages with the edge (54) of the second driven gear (6). 6
4). Further, the first pulley gear (43) is arranged at a position where it meshes with the upper half (5a) of the first driven gear (5), and the second pulley gear (44) is arranged at the lower half of the second driven gear (6). (6b).

However, the first drive pin (71) of the auxiliary gear (7) and the first
The groove (54) of the driven gear (5) constitutes a first engagement part,
The second drive pin (72) of the auxiliary gear (7) and the lug (64) of the second driven gear (6) constitute a second engaging portion.

Cassette Row - Ink 2 As shown in FIGS. 6 and 7, the cassette loading mechanism (2) is a well-known front loading mechanism,
Guide groove (9) created in the side chassis (9) of VT'R
3), slidably fit the pin (21) protruding from the cassette holder (91) into the cassette holder (91).
). The side chassis (9) has a rotating lever (22) that engages with the pin (21).
, a drive gear (23) is provided to drive the pivot lever (22). Furthermore, the gear (23) includes a worm gear (
A belt (26) connected to the above-mentioned switching mechanism (4) is wound around a pulley (25) which is in mesh with the ohm gear (24) and is rotatably attached to the ohm gear (24).

Therefore, the tape cassette (
1) is loaded, by applying rotational power to the belt (26), the rotation lever (22) rotates, and the cassette holder (91) is removed from the cassette insertion slot together with the tape cassette (1). It will be transported to the recording/reproducing position.

Tape loading mechanism (3) As shown in FIG. ) (31b), and the magnetic tape of the tape cassette is wound around the VTR cylinder by advancing the leading guide pins (31a) and (31b) toward the VTR cylinder.

A pair of lever gears (32a) (31b) are connected to the pair of leading guide pins (31a) (31b) via a link mechanism.
32b) are connected, and the lever gears (32a) (3
2b) in the forward and reverse directions, the leading guide pins (31a) and (31b) are reciprocated.

The rotational power from the switching mechanism (4) is transferred to the belt (33).
This causes the eleventh li (34) to be rotationally driven. The rotation of the 11th li (34) is caused by the belt (35)
), the cam gear (
37). The cam gear (37) has a spiral cam groove (37a), and a sector gear (37a) is formed in the cam groove.
The pin (38a) of 38) is engaged. Sector gear (3
8) is swingable about the base end as a fulcrum, and the gear portion at the tip meshes with the relay gear (39). Furthermore, relay gear (3
9) meshes with one of the pair of lever gears (32a) and (32b). Both lever gears (32a) (32b)
are meshed with each other, and as the relay gear (39) rotates, both levers partially rotate in the opening direction or the closing direction.

Therefore, by applying rotational power to the belt (33), the pair of lead guide pins (31a) and (31b) are driven, thereby winding the magnetic tape of the tape cassette around the VTR cylinder.

FIGS. 5(a) to 5(d) show the operation of the switching mechanism (4) during cassette loading and tape loading. These operations will be explained below.

Cassette row - At the start of ink cassette loading, as shown in FIG.
81), and the counterclockwise end of the toothed portion (61) of the second driven gear (6) meshes with the driving gear (81). Also, the first drive bin (71) of the auxiliary gear is the first
The second drive pin (72) is located at the clockwise end of the arm (54) of the driven gear (5), and the second drive pin (72) is located in the groove (6) of the second driven gear (6).
4) is located at the clockwise end.

From this state, the loading motor starts and the driving gear (81) starts rotating clockwise. As a result, the second driven gear (6) and the auxiliary gear (7) are driven counterclockwise, and the rotation of the second driven gear (6) is caused by the cassette loading via the second pulley gear (44) and the belt (46). This will be communicated to the organization.

FIG. 5 (I7) shows the state just before cassette loading is completed, where the driving gear (81) is in the second driven gear (6
) meshes with the clockwise end of the toothed portion (61).

In the process from Fig. 5 (a) to (b), the first auxiliary gear
Since the drive bin (71) moves along the course (54) of the first driven gear (5), the first driven gear (5) remains stationary. Further, since the auxiliary gear and the second driven gear (6) rotate together, there is no change in the relative position of the second drive pin (72) and the arm (64).

When the driving gear (81) further rotates clockwise from the state shown in FIG. 5(b), the toothed portion (61) of the second driven gear (6) and the driving gear ( 81), the second driven gear (6) stops rotating, and at this point, cassette loading is completed.

-1 Plowing Also, in the process of reaching Fig. 5(c), as the auxiliary gear rotates, the first drive bin (71) moves to the side (5) of the first driven gear (5).
4) Press the end portion to drive the gear (5) counterclockwise to engage the toothed portion (51) with the driving gear (81). Therefore, after that, the first driven gear (5) rotates counterclockwise by driving the driving gear (81) and the first drive bin (71), and this rotation is caused by the 11th rear gear (43),
It is transmitted to the tape loading mechanism via the belt (45).

FIG. 5(d) shows the state when the tape loading operation is completed and the loading motor has stopped, and the driving gear (81) is rotated in the clockwise direction of the toothed portion (51) of the first driven gear (5). It engages with the end of the Figures 5 (C) to (d)
), the second drive pin (72) moves along the groove (64) of the second driven gear (6), so the second driven gear (6) remains stationary.

-1 pull unrowing From the state shown in FIG. 5(d), the loading motor starts in the opposite direction to the above, whereby the driving gear (81) starts rotating counterclockwise, and the first driven gear (5) Rotate clockwise. The rotation of the first driven gear (5) is transmitted to the tape loading mechanism (3), and tape unloading operation is started.

Immediately before tape unloading is completed, the driving gear (81) meshes with the counterclockwise end of the toothed portion (51) of the first driven gear (5) as shown in FIG. 5(e). become. In the process from FIG. 5(d) to FIG. 5(C), the second drive pin (72) of the auxiliary gear moves to the clockwise end of the shaft (64).

After that, when the driving gear (81) further rotates counterclockwise, the meshing between the driving gear (81) and the first driven gear (5) is released, as shown in FIG. 5(b), and the first driven gear Gear (5
) stops rotating. At this point, tape unloading is complete.

Set Unlow - Ink In the process from Figure 5(c) to (b), as the auxiliary gear rotates, the second drive pin (72) drives the second driven gear (6) clockwise, and as a result , the toothed portion (61) of the second driven gear (6>) meshes with the driving gear (81).Therefore, the cassette is then driven by the driving gear (81) and the second driving pin (72). Unloading is performed. When unloading is completed, FIG.
).

According to the above loading device, switching between cassette loading and tape loading can be performed using the switching mechanism (4) with an extremely simple configuration.
This is effective in reducing the size and weight of the TR.

It should be noted that the configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope of the claims.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a loading device according to the present invention, and FIG.
Figure A is a plan view of the lower half of the first driven gear, and Figure 2 B is a plan view of the lower half of the first driven gear.
A sectional view taken along line B-B in the front view of the driven gear, Figure 3A is the second
A plan view of the upper half of the driven gear, FIG. 3B is a sectional view taken along line B-B in the front view of the second driven gear, FIG. 4A is a plan view of the auxiliary gear, and FIG. 4B is a front view B 5 is an explanatory diagram of the operation of the switching mechanism, FIGS. 6 and 7 are an oblique view and a side view of the cassette loading mechanism, and FIG. 8 is a plan view of the tape loading mechanism. (2)...Cassette loading mechanism (3)...Tape loading mechanism (4)...Switching mechanism (5)...First driven gear (6)...Second driven gear (7) ...Auxiliary gear (8)...Loading motor

Claims (1)

[Claims] [1] A tape comprising a cassette loading mechanism for transporting a tape cassette to a predetermined position within the device, and a tape loading mechanism for tensioning the magnetic tape of the tape cassette at the predetermined position on a predetermined tape running path. In the recorder, the cassette loading mechanism (2) and tape loading mechanism (3) are connected to a loading motor (8) via a switching mechanism (4), and the switching mechanism (4) is connected to the loading motor (8). A driving gear (81) rotationally driven by a driving gear (81), and first and second driven gears (5) each having toothed portions (51) (61) that can be meshed with the driving gear formed over a predetermined angular range ( 6) and an auxiliary gear (7) that constantly meshes with the driving gear, and cassette loading is performed by the meshing of the driving gear (81) and the toothed portion (51) of the second driven gear. 81) and the toothed portion (61) of the first driven gear, tape loading is performed, and the first driven gear (
5) and the auxiliary gear (7), allowing relative rotation of both gears (5) and (7) during cassette loading, and allowing both gears (5) and (7) to rotate together when tape loading starts. A first engaging portion connected to the first engaging portion is interposed, and
The second driven gear (6) and the auxiliary gear (7) are arranged to allow relative rotation of both gears (6) and (7) during tape loading, and to allow relative rotation of both gears (6) and (7) when loading a cassette.
(7) A loading device for a tape recorder, characterized in that a second engaging portion is interposed for integrally rotatably connecting the tape recorder.