JPH03142742A - Tape loading device - Google Patents

Abstract

PURPOSE:To prevent a lever on a supplying side from interfering with a reel base on the supplying side by engaging a first link and a second link with a guide groove hole nearer to a loading side than a tape lead guide so that they can be slided. CONSTITUTION:The levers 40 and 50 and the respective lead guides 2 and 3 are linked through two links 41 and 42, 51 and 52. Besides, pivots 45 and 55 which pivotally support and couple the links each other are engaged with the guide groove holes 13 and 14 so that they can be slided or arranged so that they can move along a guide groove. Therefore, when the levers 40 and 50 are turned, the guides 2 and 3 are moved while the pivotally supported parts of the links 41 and 42, 51 and 52 are bent or stretched and the pivots 45 and 55 which pivotally support and couple the links each other are moved in a fixed locus. Thus, it is enough that the turning area of the lever is small and that the lever interferes with the reel base on the supplying side is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention enables tape loading of standard type tape cassettes and cassettes smaller than the standard type without using an adapter in a magnetic recording/reproducing device. It is related to the device.

(Conventional technology) An example of a conventional tape loading device is shown in FIG.

This is the state seen from the back side of the chassis (1). The chassis (1) has guide groove holes (13) and (14) formed on both sides of the head cylinder (17) from the tape cassette loading section, and each groove Leading guide (2) that can be slid into the hole (
3) will be deployed.

On the back side of the cassette loading section, a take-up side gear (4) and a supply side gear (5) are rotatably arranged in mesh with each other.
) (51) to the leading guides (2) and (3).

The winding side gear (4) is equipped with a small diameter gear (46) concentrically.
It is formed into a stepped gear.

A rack plate (7) is provided on the back side of the chassis (1) so as to be able to slide over the winding gear (4), and the rack (70) of the rack plate is connected to the small diameter gear (4) of the winding gear (4). 46
) are meshed with each other.

The rack plate (7) is slidably driven by a positive cam (63), and when the rack plate (7) slides in the direction of arrow A, the winding side gear (4) rotates clockwise and the supply side gear (5) rotates counterclockwise. direction, and the leading guides (2) and (3) slide in the loading direction via levers (40) and (50) and links (41 and 51) to pull out the tape.

When the rack plate (7) slides in the direction of arrow B from the above state, the tape is unloaded.

By the way, tape cassettes to be set in household magnetic recording and reproducing devices include a standard full cassette (hereinafter referred to as an F cassette) and a compact cassette (hereinafter referred to as a C cassette) which is smaller than the F cassette.

The C cassette can be loaded into a standard type magnetic recording/reproducing device via an adapter and loaded by the loading device.

Recently, however, as shown in FIG. 5, a magnetic recording/reproducing apparatus is being developed which can load a dual-power set of an F cassette (9) and a C cassette (8) without using an adapter.

Similar to the F cassette (9), the standard for the C cassette (8) has been determined, and even when it is set in a standard type magnetic recording/playback device without using an adapter, it can be used on the playback device's supply reel stand (16). The point that the F cassette (9) and the C cassette (8) share the same is the same as in the conventional case where an adapter is used. Due to this condition, a problem arises when loading a C cassette tape into the head cylinder without using an adapter.
8) is the standby position of the tape leading guides (2) and (3) when loading.

As shown in Figure 7 (this is a view seen from the upper side of the chassis), when loading the F cassette (9), both tape leading guides (2) and (3) are in the standby position. )
(3) Center line L1 and link (41) in the direction of travel
The angle α formed by the center line L2 connecting the pivot points of (51) is 9
0°, the take-up side lever (40) rotates counterclockwise and the supply side lever (50) rotates clockwise to move the leading guides (2) (3) along the guide grooves (13) (14). There is no problem in pushing it out in the loading direction.

However, as shown in FIG. 8, at the standby position of both tape leading guides (2) and (3) when loading the C cassette (8), the center line L1 in the direction of movement of the tape leading guides (2) and (3) and the center line L connecting the pivot points of links (41) and (51)
The angle α formed by It is not possible to push out along the guide slots (13) (14) in the loading direction.

By making the take-up side lever (40) and the supply side lever (50) long, the angle α can be made smaller than 90°, and the leading guides (2) and (3) can be pushed out in the loading direction.

However, if the take-up lever (40) and the supply lever (50) are made long as shown by the thick solid line and dotted line in FIG. This requires a large area, which imposes restrictions on the arrangement of other mechanisms, and in particular, the problem arises that the supply side lever (50) interferes with the supply side reel stand (16).

The present invention reveals a tape loading device that solves the above problems.

(Means for Solving the Problems) The magnetic recording/reproducing device of the present invention has a tape leading guide (2) in a pair of guide slots (13) (14) formed from the cassette loading section to both sides of the head cylinder. ) and the supply side tape leading guide (3) are slidably arranged,
A tape loading device in which a rotary drive device (6) is connected to each leading guide (2) and (3) via levers and links, and the tape is loaded by hooking the tape onto a pin on the leading guide and pulling it out toward the head cylinder. Both tape leading guides (2) (3) have the guide groove holes (13) (14) on the loading side and the unloading side.
) that engages with the bosses (23) (24), (33) (34
) is provided protrudingly, first links (41) (51) are pivotally attached to the free ends of each of the levers (40) (50), and bosses () on the unloading side of both tape leading guides (2) (3) are provided.
24) The second link (42) (52) is pivotally attached to (34), and the first link (41051) and the second link (42)
(52) is disposed so as to be slidably engaged with the guide grooves (13) and (14) or movably along the guide grooves on the loading side of the tape leading guides (2) and (3). has been done.

(Operation and Effect) Two links (41) (42), (51) (52) between the levers (40) (50) and each leading guide (2) (3)
Pivots (45) and (55) that pivotally connect the links are slidably engaged with the guide grooves (13) and (14) or movable along the guide grooves. Since the levers (40) (5G) are rotated, the pivot parts of the links (41042), (51) and (52) bend or extend to move the leading guide (2).
(3), and the pivots (45) (55) that pivotally connect the links move in a fixed trajectory, so the rotation area of the lever is narrow, and the lever (40) (50)
) can be avoided from interfering with the supply side reel stand, as would be the case if the lever (40) (5
The problem of restrictions on the arrangement of other mechanisms due to the wider rotation area of 0) can also be solved.

(Embodiment) As shown in FIG. 1, a head cylinder (17), a take-up reel stand (15), and a supply reel stand (1
6) is installed in the same manner as the previous magnetic recording/reproducing device exclusively for F cassettes.

An F cassette loading section (90) and a C cassette loading section (
80) are provided overlapping each other.

A reel drive device (not shown) for driving the take-up reel (81) of the C cassette (8) is arranged between the take-up reel stand (15) and the supply reel stand (16) so as to be movable up and down. There is.

The chassis (1) is composed of a main chassis (11) and a sub-chassis (12) arranged in parallel below the main chassis (11).

A pair of groove-shaped guide portions (not shown) are provided in the main chassis (11) from the vicinity of the supply side reel stand (16) to both sides of the head cylinder (17), and winding passes through the guide portions. A take-side tape leading guide (2) and a supply-side tape leading guide (3) are slidably arranged.

On the top of each tape leading guide (2) (3), there are vertical guide pins (21) (31) and inclined guide pins (22).
(32) are provided protrudingly, and bosses (23) (24), (23) are provided on the loading side and unloading side on the lower surface.
(34) is provided protrudingly. Loading side boss (2
3) (33) is located coaxially with the vertical guide pins (21) (31).

A pair of guide grooves (13) (14) are provided in the sub-chassis (12) corresponding to the groove-shaped guide portions, and the tape leading guide (2) (
3) bosses (23) (24), (33) (34) are slidably fitted.

A tape leading guide (2) (3) drive winding gear (4) is located below the sub-chassis (12) between the head cylinder (17) and the F cassette loading section (90).
and the supply side gear (5) are in mesh with each other, and the shaft (43) (5)
3), and both gears connect to the tape leading guide ( 2) Linked to (3).

As is well known, gears (4) (5) and levers (40) (
50) are connected via torsion springs (not shown), and when no load is applied to the leading guides (2) and (3), the gear and lever rotate together, but the leading guides (2) and (3) rotate together. Even if the levers (40) (50) press the leading guides (2) (3) when the guides have reached the loading end, the torsion springs can be bent to release the pressing force and the mechanism will be destroyed. Leading Guide (2)
) (3) can be reliably pressed and held at the loading position.

A first link (41') (51) is pivotally attached to the free end of each lever (40) (50) by a pivot (44) (45), and is used for unloading of both tape leading guides (2) (3). Attach the second link (42) to the side boss (24) (34) (
52) is pivotally mounted.

1st link (41) (51) and 2nd link (42)
(52) has the guide slots (13) and (14) on the loading side compared to the tape leading guides (2) and (3).
They are pivotally connected by pivots (45) and (55) fitted in the.

The winding side gear (4) is formed into a two-stage gear with a small diameter gear (46) provided concentrically.

On the back side of the chassis (11) is a sector gear (65) that overlaps the take-up side gear (4) and is rotatable around the shaft (68).
is provided, and the gear (63) meshes with the small diameter gear (46).

A protruding shaft (65) protruding from the sector gear (65) is provided in the cam groove (64) of the positive cam (63) that rotates around the shaft (68).
67) is slidably fitted.

The positive cam (63) is connected to the motor (6) via the gear train (62).
1) and rotates.

However, as shown in FIG. 4, when the C cassette (8) is inserted, the outer stop groove (64) of the cam groove (64) of the positive cam (63)
The protruding shaft (67) of the sector gear (65) is located at a), and the leading guide (2) (3) is connected to the C case/soto (
8) is waiting at a position corresponding to the leading guide fitting part (81).

As the positive cam (63) rotates counterclockwise, the sector gear (65) rotates clockwise, and the winding side gear (4)
Rotate counterclockwise. This allows the supply side gear (
5) rotates counterclockwise.

Lever (40) (50) and each leading guide (2) (3
) and two links (41) (42), (51) (52
), and the pivots (45) (55) which pivotally connect the links are slidably disposed in the guide slots (13) (14), so that the levers (40) (50)
Due to the rotation of the link (41) (42), (51) (5
The leading guides (2) and (3) are moved while the pivot parts of 2) are bent or extended, and the pivots (45) and (55) that pivotally connect the links move along a constant trajectory. As shown by line L4 in FIG. 9, the rotation area of the lever can be narrow, and interference of the lever with the supply side reel table can be avoided, and the area required for rotation of the levers (40) and (50) can be reduced. This can solve the problem of restrictions on the placement of other mechanisms due to the increased width.

As shown in Figure 3, when inserting the F cassette (9), the positive cam (
The protruding shaft (67) of the sector gear (65) is located in the central stop groove (64b) of the cam groove (64) of the sector gear (63).
The leading guides (2) and (3) are waiting at positions corresponding to the leading guide fitting portions (91) of the F cassette (9).

The subsequent loading operation is the same as above.

Furthermore, in the present invention, the first link (41) (51) and the second link
Pivot (45) that pivotally connects the link (42) (52)
Depending on the position of (55), tape leading guide (2) (3)
The direction in which the guide is pressed at the loading completion position can be set freely to some extent.

In addition, when implementing the present invention, the first and second links (41)
(42), (51) and (52) are pivotally connected (45)
) (55) is not limited to sliding the guide slots (13) (14);
) The present invention is not limited to the configuration of the embodiment, and can be modified in various ways within the scope of the claims.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the loading device when tape loading is completed, Fig. 2 is a front view of the loading device, Fig. 3 is a plan view showing the standby state of the tape leading guide when loading the C cassette, and Fig. 4 is A plan view showing the standby state of the tape leading guide when loading the F cassette, FIG. 5 is an explanatory diagram of the moving state of the tape leading guide of the magnetic recording/reproducing device for both C cassette and F cassette, and FIG. 6 shows conventional tape loading. 7 is a rear view of the device; FIG. 7 is a plan view showing the standby state of the tape leading guide when loading an F cassette in a conventional example;
This figure is a plan view showing the standby state of the tape leading guide when loading a C cassette in the conventional example, and FIG. 9 is a comparative explanatory view of the rotation area of the lever in the conventional example and the present invention. (1)... Chassis (2)... Tape leading guy on the winding side (3)... Tape leading guy on the supply side (4)... Winding side gear (5)... Supply side gear ( 6)...Rotary drive device Todo

Claims (1)

[Claims] (1) Slide the take-up side tape leading guide (2) and the supply side tape leading guide (3) into a pair of guide slots (13) and (14) formed from the cassette loading section to both sides of the head cylinder. Possible to deploy each lead guide (2) (3)
In a tape loading device, both tape leading guides (2) are connected to a rotary drive device (6) via levers and links, and the tape is loaded by hooking the tape onto a pin on the leading guide and pulling it out toward the head cylinder. )(
3) includes bosses (23) (on the loading side and unloading side) that engage with the guide slots (13) (14);
24), (33) and (34) are provided protrudingly, and each of the levers (
The first link (41) (51) is attached to the free end of 40) (50).
is pivotally mounted, and a second link (4) is attached to the boss (24) (34) on the unloading side of both tape leading guides (2) (3).
2) (52) is pivotally connected, and the first link (41) (51)
and the second link (42) (52) are tape leading guides (
2) The guide slot (
13) A tape loading device, characterized in that it is pivotally connected by pivots (45) and (55) slidably engaged with (14) or movably disposed along the guide groove.