JPH02247858A - Tape loader - Google Patents

Abstract

PURPOSE:To design a driving mechanism in a high degree of freedom by providing a rotor to be rotatively driven by a motor and a link mechanism for making a linkage between this rotor and a guide lever in the middle of the driving mechanism from the motor to the guide lever. CONSTITUTION:The motor 5 on a chassis 1 is connected with a 1st driving mechanism for driving a leading guide body 22 back and forth and a 2nd driving mechanism for driving a tape guide 91 back and forth. The 2nd driving mechanism is composed of the inclined guide lever 9 provided with a turnable tape guide 91, a stopper 15 for regulating a turning end of this lever 9 on the side of a tape traveling course, the rotor 26 to be rotatively driven by the motor 5 and the link mechanism 93 for making a linkage between the rotor 26 and the lever 9. The link mechanism 93 is provided with a motive lever 7 to be engaged with the rotor 26 and a spring 95 between the rotor 26 and the lever 9. The leading guide body 22 passes through a moving space for the tape guide 91 in a process of rotating the rotor 26 by a prescribed angle against the lever 7, while the lever 9 is pressed against the stopper 15 by the spring in its elastic deformation in a process of rotating integrally the lever 7 and the rotor 26.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tape loading device for stretching a magnetic tape along a predetermined tape running path in a tape recorder such as a VTR.

(Prior Art) Generally, in a VTR, a magnetic tape is pulled out from a tape cassette loaded in the device and wound around a rotating head cylinder at a predetermined angle.
First and second guide grooves (12) and (13) are provided on both sides of the rotating head cylinder (6), and a pair of tape leading guide bodies (21 and 22) are slidably engaged with these guide grooves. Attach both leading guide bodies to a tape cassette (10)
Rotation from the side and advancement towards the cylinder (6) is carried out.

In addition, in order to stretch the magnetic tape (100) extending from the tape cassette (lO) to the rotary head cylinder (6) on a predetermined tape running path as shown in FIG. , an inclined guide lever (9) provided with an inclined tape guide (91) is provided, and the lever is rotated clockwise from the tape cassette (10) side.

In a conventional VTR, after rotating the inclined guide lever (9) to the position shown in FIG. ) to position the tilt guide lever (9).
) was equipped with a crimping mechanism separate from the drive mechanism.

That is, in conventional VTRs, the audio control head is mounted on a movable base, and the movable base is pressed against a stopper on the chassis by the driving force of a loading motor to position the audio control head. The pressing force against the movable base was also transmitted to the inclined guide lever, and the levers were pressed together at the same time.

In particular, the positioning accuracy of the audio control head directly affects the distance (X value) from the rotating head cylinder to the audio control head.
The pressing force of the head against the base needs to be set sufficiently large.

(Problem to be Solved) However, in the conventional VTR, since the base of the audio control head and the tilt guide lever are both crimped at the same time, there has been a problem that the load on the loading motor becomes excessive.

Furthermore, in the conventional tilt guide lever drive mechanism, due to design constraints of the mechanism, after the leading guide body (22) on the right side of the rotating head cylinder (6) passes near the audio control head (61), Since the inclined tape guide (91) was to pass through the same space after a considerable delay, when the inclined tape guide (91) comes into contact with the magnetic tape, the inclination of the inclined tape guide (91) and the magnetic tape are A large difference occurred between the magnetic tapes and the magnetic tape could be damaged by the inclined tape guide (91).

An object of the present invention is to improve the positioning accuracy of the audio control head and reduce the motor load by making the support base of the audio control head fixed, and to improve the operating timing of the tilt guide lever than before. To provide a tape loading device which can be designed with flexibility and thereby prevent damage to a magnetic tape during tape loading.

(Means for Solving the Problem) In the tape loading device according to the present invention, both the leading guide body (21) (22) and the guide lever (9) are driven by the motor (5), and the In the drive mechanism leading to the guide lever (9), there is a rotating body rotationally driven by the motor, and the rotating body and the guide lever (9).
A link mechanism is interposed to connect the two.

The link mechanism includes a driving lever (7) that engages with the rotating body so as to be relatively rotatable within a predetermined angular range, and an elastic member interposed between the rotating body and the guide lever (9).

(Function) In the tape loading process, when the rotating body rotates by a predetermined angle relative to the stationary driving lever (7), first, the leading guide body (22) is driven to move the tape guide (91). After passing through the moving space, the elastic member deforms during the process in which the driving lever (7) and the rotating body rotate together, and the tape guide lever (9) is pressed against the stopper (15) by the elastic force of the elastic member. (Effects of the Invention) In the tape loading device according to the present invention, the movement and crimping operation of the guide lever (9) is performed by the power of the motor (5) that drives the leading guide bodies (21) (22). Therefore, there is no need to use the crimp force of the audio control head (61) as in the conventional case, and the audio control head (61) is attached to the chassis (1).
), thereby making it possible to improve the positional accuracy of the head.

In addition, by setting the relative rotation angle between the rotating body and the driving lever (7) and the lever ratio of the link mechanism installed in the drive mechanism of the guide lever (9) to appropriate values, the leading guide body (22) can be Audio control head (61)
Immediately after passing near the tape guide (9
1), it is possible to design the drive mechanism with a higher degree of freedom than in the past, so that damage to the magnetic tape during tape loading can be prevented.

(Example) Hereinafter, a first example and a second example in which a tape loading device according to the present invention is implemented in a VTR will be described in detail.

The examples are for illustrating the present invention, and should not be construed to limit or reduce the scope of the invention described in the claims.

(First Embodiment) Figures 1 to 3 show the overall configuration of a main chassis (1) and a tape loading mechanism (2) disposed on a sub-chassis (11) supported on the chassis. There is.

Qi On the guide main chassis (1) is a tape cassette (lO).
At the back of the installation space, there is a rotating head cylinder (6)
is arranged, and a sub-chassis (11) is attached surrounding the rotating head cylinder (6).

The subchassis (11) has a rotating head cylinder (6
) and a second guide groove (12) extending along the circumferential surface of the
Guide grooves (13) are provided, and a first leading guide body (21) and a second leading guide body (22) are provided in these guide grooves for pulling out the magnetic tape from the tape cassette (10).
is slidably fitted.

Catchers (16) (17) for positioning the first and second leading guide bodies (21) (22) are provided at the end portions of the first and second guide grooves (12) (13), respectively. There is.

Also, on the main chassis (1), there is a second guide groove (13).
) and at a higher position than the sub-chassis (11), an audio control head (61) for recording and reproducing audio signals and control signals is disposed, and is fixed to the main chassis (1). ing.

The output shaft of the loading motor (5), which serves as the power source for the tape loading mechanism (2), is connected to a worm gear (52) via a pulley mechanism (51).
2) meshes with the cam gear (3). Cam gear (3)
A spiral cam groove (34) is recessed in the side surface of the reel, and a cam follower (34a) connected to a reel stand brake mechanism (not shown) is engaged with the cam groove (34).

The cam gear (3) passes through the relay gear (4), the first ring drive gear (24), and the second ring drive gear (25), and then connects to the first and second cam gears arranged around the rotating head cylinder (6). It is connected to loading rings (26) and (27).

The first ring drive gear (24) meshes with the tenth ring (26), and the second ring drive gear (25) meshes with the tenth ring (26).
0 - meshes with deing ring (27).

The first and 20th deing rings (26) (27) are relatively rotatably supported by a plurality of support gears (28) arranged on the main chassis (1), and the 10th deing ring (26) The first leading guide body (21) is connected to the 20th leading guide body (21) via the first connecting piece (29a), and the second leading guide body is connected to the 20th leading ring (27) through the second connecting piece (29b). (22) are concatenated.

Therefore, the pair of loading gears (26) and (27) are rotated in opposite directions by the driving of the loading motor (5), and the first and second leading guide bodies (21) ( 22) is the guide groove (12) (13
).

As shown in FIGS. 2(a) and 2(b), the cam gear (3) of the tape loading mechanism (2) is arranged on the lower surface of the main chassis (1), and the first ring drive gear (24) and the second ring drive gear (24)
The ring drive gear (25) is arranged on the upper surface of the main chassis (1) covered by the sub-chassis (11). Further, the relay gear (4) is disposed in a raised opening (14) formed by pressing a part of the main chassis (1), and the upper gear part (41) extends from the opening to the upper surface of the chassis.
) is meshed with the first ring drive gear (24), and the lower gear portion (42) is meshed with the cam gear (3).

Guide lever As shown in Figure 1, insert the audio control head (
61), an inclined guide lever (9) equipped with an inclined tape guide (91) for stretching the magnetic tape along a predetermined running path is arranged so as to be rotatable about the support shaft (90). ing.

As the tilt guide lever (9) rotates clockwise as shown in FIG. 8, it enters the gap between the subchassis (11) and the audio control head (61), and as shown in FIG. The end of rotation is regulated by a first stopper (15) protruding from the support shaft of the support gear (28). Further, the end of rotation in the counterclockwise direction is regulated by a second stopper (18) provided on the sub-chassis (11).

On the other hand, on the main chassis (1), a lever serving as a rotating body that meshes with the gear part of the lower 20th deng ring (27) is disposed near the support shaft (90) of the inclined guide lever (9). A drive gear (92) is supported by a support shaft (70),
The gear (92) and the inclined guide lever (9) are connected to each other via a coil spring (95), a link (93), and a driving lever (92), as will be described later.

As shown in Figures 4 and 5, the inclined guide lever (9)
A pin (9a) is provided at the free end on the opposite side of the inclined tape guide (91) to protrude upward, and the pin (9a) is connected to a long hole (96) formed at one end of the link (93). fit loosely into A shaft piece (97) is provided protruding from the other end of the link (93).

At the upper end of the support shaft (70) of the lever drive gear (92),
A driving lever (7) is rotatably supported, and the link (93) is inserted into a round hole (72) formed at one end of the lever.
) are fitted together so that they can rotate relative to each other.

Further, a pin (71) is provided at the other end of the drive lever (7) to protrude downward, and the pin (71) is connected to the lever drive gear (9).
2) and is slidably engaged with a C-shaped guide groove (92a) recessed in the side surface of the part.

Furthermore, a torsion spring (94) is interposed between the inclined guide lever (9) and the main chassis (1), thereby urging the inclined guide lever (9) to rotate in the counterclockwise direction. ) protruding hook (98)
A coil spring (95) is stretched between the upper end of the pin (9a) of the inclined idle lever (9) and the upper end of the pin (9a) of the idle lever (9).

The operation of the inclined guide lever drive mechanism will be described below with reference to FIGS. 6 to 10.

20th - Day Ring in Uni 1 Ennog Kouseki Tape Loading (
27) by counterclockwise rotation, the lever drive gear (
92) is rotated clockwise.

At the start of loading, as shown in Fig. 6, the inclined guide lever (9) is positioned at the counterclockwise rotation end by the bias of the torsion spring (94), and the inclined tape guide (91) is moved toward the tape cassette ( 10) is placed inside the magnetic tape (100) and spaced apart from the magnetic tape.

Further, the pin (71) of the drive lever (7) is located at the clockwise end of the guide groove (92a) of the lever drive gear (92).

When tape loading is started, the first and second leading guide bodies (21, 22) are moved to the rotating head cylinder (6) as shown in Fig. 7 by driving the double-ended ding rings (26, 27). The magnetic tape (100) is pulled out from the tape cassette (10) and begins to be wound around the circumferential surface of the rotary head cylinder (6).

Also, by driving the 20th deing ring (27),
The lever drive gear (92) rotates clockwise.

This moves the guide groove (92a), but in the process of transitioning from the state shown in FIG. 6 to the state shown in FIG. 7, the pin (71) of the driving lever (7) is pressed by the wall surface of the guide groove (92a). There is no driving lever (7) and link (93)
remains stationary. Therefore, this lever drive gear (
During the idle rotation period of 92), the inclined guide lever (9) does not rotate. During the idling period, the inclined tape guide (9
1) and the second leading guide body (22) are provided to avoid mutual interference.

After that, as the lever drive gear (92) continues to rotate, the seventh
As shown in the figure, the wall surface of the counterclockwise end of the guide groove (92a) comes into contact with the pin (71).

In this state, the second leading guide body (22) is
It has already passed near the control head (61).

As the lever drive gear (92) further rotates clockwise as shown in FIG. 8, the pin (71) is pressed by the wall surface of the guide groove (92a) of the lever drive gear (92), and the driving lever ( 7) is driven clockwise. This pulls the link (93) toward the tape cassette (10), and the pulling force is transmitted to the inclined guide lever (9) via the coil spring (95).

As a result, the inclined guide lever (9) is rotated clockwise against the torsion spring (94), and the inclined tape guide (91) is rotated clockwise against the torsion spring (94).
come into contact with.

The lever drive gear (92) continues to rotate clockwise,
As shown in Fig. 9, with the end of the inclined guide lever (9) in contact with the stopper (15), hold the inclined tape guide (
91) is installed on a predetermined tape running path. Note that the inclined tape guide (91) is connected to the second leading guide body (22).
After passing near the audio control head (6D), they pass through the same space, so the inclined tape guide (91) and the second leading guide body (22) do not interfere with each other.

After that, the first and second leading guide bodies (21) (22)
The magnetic tape (100) hits the catchers (16) and (17) and stops, thereby causing the magnetic tape (100) to be wound around the circumferential surface of the rotary head cylinder (6) over a predetermined angular range.

Thereafter, the loading motor continues to rotate, and the inclined idle lever (9) is pressed against the stopper (15).

That is, when the lever drive gear (92) rotates clockwise from the state shown in FIG. 9, the driving lever (7) is further driven clockwise as shown in FIG. 10, and accordingly, the link (93)
is pulled toward the tape cassette (io).

At this time, the slope of the idle lever (9) is the first stopper (
15) and cannot rotate, but the link (93
) will be moved. Along with this, link (9
3) The long hole (96) and the pin (
9a) is displaced, and the coil spring (95
) is stretched.

As a result, the inclined guide lever (9) is pressed against the first stopper (15) by the elastic contraction force of the coil spring (95), and the tape loading operation is completed.

After that, the loading motor (5) continues to rotate, and the rotation of the cam gear (3) drives the cam follower (34a) shown in FIG. 1, and various mode settings such as normal playback mode and playback stop mode are performed. However, immediately after the crimping of the inclined guide lever (9) to the stopper (15) is completed, the well-known intermittent rotation mechanism formed between the cam gear (3) and the relay gear (4) operates to disconnect the power transmission path. After that, move the tilt guide lever (9)
) and the first and second leading guide bodies (21) (22),
Stopper (15) or catcher (16) (17)
You will not be forced towards it.

When the unloading motor reverses and the lever drive gear (92) starts rotating counterclockwise from the state shown in Fig. 10, the driving lever (7) is rotated by the coil spring (95).
The link (9
3) moves in the direction away from the tape cassette (10), and the wall end of the elongated hole (96) of the link (93) comes into contact with the bin (9a) of the inclined guide lever (9) as shown in FIG. .

When the lever drive gear (92) further rotates counterclockwise, the inclined guide lever (9) is urged by the torsion spring (94) and starts rotating counterclockwise.

The rotational force of the idle lever (9) is generated by the coil spring (95).
) to the link (93), thereby driving the link (93) further away from the tape cassette (10), and in conjunction with this, the driving lever (7) rotates counterclockwise.

Thereafter, after passing through the state shown in FIG. 8, the inclined guide lever (9) rotates to the counterclockwise rotation end as shown in FIG. 7, and the lever drive gear (92) further rotates counterclockwise. The state returns to the state at the start of loading shown in FIG.

According to the above-mentioned inclined guide lever drive mechanism, the lever drive gear (92) is not directly connected to the link (93), but the driving lever (7) is connected between the lever drive gear (92) and the link (93). ), the lever ratio between the driving lever (7) and the link (93) can be changed arbitrarily at the design stage.

Therefore, by setting the lever ratio to an appropriate value,
It is possible to reduce the power required to press the inclined guide lever from FIG. 9 to FIG. 10.

That is, in FIG. 10, a straight line La connecting the rotation center of the driving lever (7) and the shaft piece (97) of the link (93),
Center of rotation of drive lever (7) and tilt guide lever (9)
By setting the angle θ with the straight line La connecting the bin (9a) as small as possible, the rotational torque of the lever drive gear (92) required when pressing the inclined guide lever is reduced.

(Second Embodiment) In this embodiment, the tape leading guide drive mechanism has the same structure as the first embodiment, but the structure of the inclined guide lever drive mechanism is different.

The configuration and operation of the tilt guide lever drive mechanism will be described in detail below.

・Guide lever drive As shown in Figures 11 to 13, the main chassis (1
) An auxiliary spring (80), an idle lever (8), and a driving lever (84) are interposed between the lever drive gear (92) and the inclined guide lever (9).

One end of the link (93) has an inclined guide lever (
Open a long hole (96) into which the bottle (9a) of 9) loosely fits,
A round hole (99) into which the connecting bottle (86) is rotatably fitted is provided at the other end. Further, a hook (98) is provided protruding from the center of the link (93).

On the other hand, on the side surface of the lever drive gear (92), a projecting piece (92b) and a convex part (92c) are formed at predetermined positions on the outer periphery, and a spiral guide wall (92d) is formed on the inner periphery.
is installed protrudingly.

An idle lever (8) and a driving lever (84) are fitted into the upper end of the support shaft (70) so as to be freely rotatable independently. The idle lever (8) has a protrusion (81) projecting downwardly at the end of the fan-shaped lever part (8a) that can come into contact with the convex part (92c) of the lever drive gear (92). A pressing wall (82) is formed on the side surface of the portion (8a) opposite to the protrusion (81). Further, a protruding piece (83) is formed downward at the center of the lever part (8a).

The driving lever (84) has a part on the side of the lever (84a),
A bent piece (85) that can be abutted by the pressing wall (82) of the idle lever (8) is provided to protrude downward. In addition, a round hole (87) is opened in a part of the matching bar (84a), and the round hole (87)
7), the connecting pin (86) is rotatably fitted to connect the driving lever (84) and the link (93).

Spiral guide wall (92d) of lever drive gear (92)
An auxiliary spring (80) is provided along the outer peripheral surface of the
Both ends of the auxiliary spring (80) are respectively engaged with the protruding piece (92b) of the lever drive gear (92) and the protruding piece (83) of the idle lever (8), so that the idle lever (8) is connected to the lever driving gear ( 92) in a clockwise direction. Therefore, due to the biasing force, the protrusion (
81) comes into contact with the convex portion (92c) of the lever drive gear (92).

Furthermore, a coil spring (95) is stretched between the hook (98) projecting from the link (93) and the upper end of the pin (9a) of the inclined guide lever (9).

121 Engineering No. 20 in the last tape loading (
27) by counterclockwise rotation, the lever drive gear (
92) is rotated clockwise.

At the start of loading, as shown in FIGS. 14(a) and 14(b), the inclined guide lever (9) is positioned at the counterclockwise rotation end by the bias of the torsion spring (94), and the inclined tape guide ( 91) is a tape cassette (1
The magnetic tape (100) is placed inside the magnetic tape (100) in the magnetic tape (100) and spaced apart from the magnetic tape.

Also, due to the bias of the auxiliary spring (80), the protrusion (81) of the idle lever (8) is activated by the lever drive gear (92).
The idle lever (8) is positioned at the rotation end in the clockwise direction relative to the lever drive gear (92).

The driving lever (84) is positioned at the rotation end in the counterclockwise direction relative to the lever drive gear (92) depending on the position of the link (93), and the bending piece (85) is positioned at the end of rotation in the counterclockwise direction with respect to the lever drive gear (92). It is located at a position displaced by a predetermined angle from the pressing wall (82).

When tape loading is started, the double-ended ding rings (26) and (27) are driven so that the tape loading starts as shown in FIG. 15(a).
), the first and second leading guide bodies (21, 22) move forward toward the rotating head cylinder (6), pull out the magnetic tape (100) from the tape cassette (lO), and move the magnetic tape (100) out of the rotating head cylinder (6). ) begins wrapping around the circumferential surface. Further, by driving the 20th deng ring (27), the lever drive gear (92) rotates clockwise as shown in FIG. 15(b).

During the transition from the state shown in FIG. 14(b) to the state shown in FIG. 15(b), the idle lever (8) is connected to the lever drive gear (92) via the auxiliary spring (80) as described above. , while the protrusion (81) is in contact with the protrusion (92c) of the lever drive gear (92), the lever drive gear (92) is
rotates as one.

On the other hand, since the driving lever (84) is not engaged with the idle lever (8), it remains stationary together with the link (93). Therefore, during the idle rotation period of the lever drive gear (92) and the idle lever (8), the inclined guide lever (9) does not rotate.

Thereafter, as the lever drive gear (92) continues to rotate, the first
5 (b), the pressing wall (82) of the idle lever (8)
) comes into contact with the bent piece (85) of the driving lever (84).

In this state, the second leading guide body (22) is moved as shown in FIG.
) as shown in the audio control head (61)
It has already passed near.

As shown in FIGS. 16(a) and (b), the lever drive gear (92
) further rotates clockwise, the drive lever
The bent piece (85) of (84) is pressed by the pressing wall (82) of the idle lever (8), and the driving lever (84) is driven clockwise. As a result, the link (93) is pulled toward the tape cassette (10), and the pulling force is transmitted to the idle lever (9) via the coil spring (95).

As a result, the inclined guide lever (9) is driven to rotate clockwise against the torsion spring (94), and finally stops against the first stopper (15) as shown in FIG. 16(b).

Incidentally, the inclined tape guide (91) is connected to the second leading guide body (
22) passes near the audio control head (61), the inclined tape guide (91) and the second leading guide body (22) do not interfere with each other although they pass through the same space.

Thereafter, the lever drive gear (92) further rotates clockwise, and as shown in FIG.
) and stops, which causes the magnetic tape (100) to stop.
is wound around the circumferential surface of the rotating head cylinder (6) over a predetermined angular range.

Also, from the state shown in Fig. 16(b), the lever drive gear (92)
When the drive lever (84) rotates clockwise, the drive lever (84) is further driven clockwise, and the link (93) is accordingly pulled toward the tape cassette (10). At this time, since the inclined guide lever (9) hits the stopper (15) and cannot be rotated, only the link (93) moves. Along with this, the link (9
3) The long hole (96) and the pin (
9a) is displaced, and the coil spring (95
) and the auxiliary spring (80) are stretched.

As a result, the coil spring (95) and the auxiliary spring (8
0), the inclined guide lever (9) is pressed against the stopper (15), and the loading operation is completed.

Unrope.

When the loading motor reverses and the lever drive gear (92) starts rotating counterclockwise from the state shown in FIG. 95) and rotates counterclockwise, the link (93) moves in a direction away from the tape cassette (lO), as shown in FIG. 16(b).
As shown, the wall end of the elongated hole (96) of the link (93) comes into contact with the pin (9a) of the inclined guide lever (9).

When the lever drive gear (92) further rotates counterclockwise, the inclined guide lever (9) is urged by the torsion spring (94) and starts rotating counterclockwise.

The rotational force of the inclined guide lever (9) is generated by a coil spring (95).
) to the link (93), which further drives the link (93) in the direction away from the tape cassette (10), and the drive lever (84) and idle lever (8) are accordingly moved in a reverse direction. Rotate clockwise.

After that, as shown in Fig. 15(b), move the inclined guide lever (9)
rotates to the counterclockwise rotation end, and the lever drive gear (92) further rotates counterclockwise, so that the pressing wall (82) of the idle lever (8) is rotated to the driving lever (84).
It separates from the bent piece (85) and returns to the state at the start of loading as shown in FIG. 14(b).

According to the inclined guide lever drive mechanism, the lever drive gear (92) is not directly connected to the link (93), but the idle lever (8) is connected between the lever drive gear (92) and the link (93). ) and the driving lever (84) are interposed, so by designing the lever ratio of the driving lever (84) and the link (93) to an appropriate value, as in the first embodiment, (b) to Fig. 15(b)
This makes it possible to reduce the rotational torque of the lever drive gear (92) required for the inclined guide lever crimping operation shown in FIG.

In addition to selecting the lever ratio, the lever drive gear (92
) by setting the idle period to an appropriate length.
As shown in FIG. 6(a), immediately after the second leading guide body (22) passes near the audio control head (61), the inclined guide (91) passes through the same space. It is possible to design the operating timing of the lever (9), thereby preventing damage to the magnetic tape.

Further, in both the tape loading devices of the first and second embodiments, the first ring drive gear (24) and the second ring drive gear (25) are thin-shaped, respectively, as shown in FIG. Since it is composed of spur gears, the subchassis (1
1) and the main chassis (1) can be designed narrowly,
This allows the VTR to be made thinner.

Furthermore, the power transmission path from the loading motor (5) to the loading rings (26) and (27) is entirely constituted by a gear mechanism, and no cam mechanism is involved.
High power transmission efficiency can be obtained.

The drawings and the description of the above embodiments are for illustrating the present invention, and do not limit the invention described in the claims.
Nor should it be construed as limiting the scope.

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

[Brief explanation of drawings]

Fig. 1 is a plan view of the tape leading guide drive mechanism and the idle lever driving mechanism with an incline, Fig. 2 is a longitudinal sectional view of the tape leading guide driving mechanism, Fig. 3 is a sectional view of the idle lever driving mechanism with an incline. FIG. 5 is an exploded perspective view of the mechanism, FIGS. 6 to 10 are plan views showing a series of operations of the tape leading guide drive mechanism and the inclined guide lever drive mechanism, and FIG. 11 is an inclined view of the mechanism. A perspective view showing another configuration example of the guide lever drive mechanism, FIG. 12 is an exploded perspective view of the mechanism, FIG. 13 is a vertical sectional view of the mechanism, and FIGS. 14(a) (b) to 17( a) and (b) are a series of plan views showing the operations of the tape leading guide drive mechanism and the inclined guide lever drive mechanism. (93)...link

Claims (1)

[Scope of Claims] [1] A tape leading guide body (22) that wraps a magnetic tape pulled out from a tape cassette around the circumferential surface of a rotary head cylinder (6) over a predetermined angle range; ), a tape guide (91) for tensioning the magnetic tape extending from the tape cassette to the rotating head cylinder (6) on a predetermined tape running path, and the tape guide (91). In the tape loading device, a motor (5) disposed on the chassis (1) is connected to the first and second drive mechanisms, and the second drive mechanism includes: A guide lever (9) that is rotatably supported on the chassis (1) and has the tape guide (91) projecting thereon, and a stopper (15) that restricts the rotation end of the guide lever (9) on the tape running path side. ), a rotating body rotationally driven by the motor (5), and a link mechanism connecting the rotating body and the guide lever (9), and the link mechanism is configured to rotate within a predetermined angular range with respect to the rotating body. The driving lever (7), which is stationary, includes a driving lever (7) that is relatively rotatably engaged with the driving lever (7), and an elastic member interposed between the rotating body and the guide lever (9).
), the leading guide body (22) passes through the moving space of the tape guide (91), and the driving lever (7) and the rotating body rotate together. . A tape loading device, wherein the elastic member is elastically deformed and the guide lever (9) is pressed against the stopper (15). [2] The driving lever (7) and the rotary body are each coaxially supported to freely rotate, and the side surface of the rotating body is provided with an arcuate groove (92a) over a predetermined angular range. 7)
A pin (71) protruding from one end is slidably engaged with the groove (92a), and the other end of the drive lever is connected to a link (9).
3) to the end of the guide lever (9) with play, and the link (93) and the guide lever (9)
The tape loading device according to claim 1, wherein the tape loading device is connected by a spring (95) serving as an elastic body. [3] Install the idle lever (
8) and a driving lever (84) are each rotatably supported, and the rotation end of the idle lever (8) relative to the rotating body in the loading direction is defined by the rotating body, and the driving lever (84) is supported during loading. The idle lever (84) is provided with a pressing wall (82) to be in contact with the end of the idle lever (84).
) and the rotating body is interposed a first spring member that urges the idle lever (8) toward the rotation end defined by the rotating body, and the end of the driving lever (84) is The link (93) is connected to the end of the tape guide lever (9) with play, and the link (93) and the tape guide lever (9) are connected by a second spring member. The tape loading device according to claim 1, wherein the second spring member constitutes the elastic body.