JPH02173965A - Tape loading device - Google Patents

Abstract

PURPOSE:To lower accuracy in fabricating a tape loading mechanism and to simplify its fabricating stages by position-regulating either a 1st tape pulling-out member or a 2nd pulling-out member at an unloading completing position and positioning the 1st and 2nd tape pulling-out members. CONSTITUTION:The 1st and 2nd tape members 39a and 39b pull out the tape of a tape cassette to wind around a cylinder 37. The 1st tape drawing member 39a is allowed to abut on the one end of a 1st guide hole 38a at the loading completing position to control position. Therefore, the 1st and 2nd tape pulling- out members 39a and 39b are positioned at the unloading completing position. Simultaneously, the 1st and 2nd tape pulling-out members 39a and 39b are energized toward the loading start position at the unloading completing position via a spring member. Therefore, the accurate positioning can be persuaded regardless of accuracy in fabricating the tape loading mechanism including a mode switching cam 32 that drives the 1st and 2nd tape members 39a and 39b. Thereby, in accuracy fabricating the mode switching cam 32 can be lowered and the fabricating stages can be simplified.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a video tape recorder (hereinafter referred to as VTR).
The present invention relates to a magnetic recording/reproducing device such as the above, and particularly relates to a tape loading device thereof.

(Prior Art) In general, in a VTR, when a tape cassette is inserted into a cassette holder in a substantially horizontal manner by a user, a front loading device is first activated to transport the cassette holder in a substantially horizontal manner to load the tape cassette into a tape cassette. Load it into the drive unit,
Thereafter, the tape loading device is operated, and the tape wound around the tape cassette is pulled out and loaded onto the cylinder.

Here, the operation mode of the tape drive unit is controlled to be switched to a predetermined mode, and the tape is driven.

By the way, the next requirement for such a VTR is to ensure highly accurate operation control of each part, and then to simplify the component parts and simplify their manufacture.

For example, a tape loading device that pulls out a tape from a loaded tape cassette and loads it into a cylinder is an example of such a device. That is, in the tape loading device, when the tape cassette is loaded into the tape drive section, the tape pulling member is brought into contact with the tape of the tape cassette,
By driving this tape drawer member, the tape in the tape cassette is pulled out and mounted on the cylinder so that the tape can be driven. At this time, in order to ensure high viscosity tape drive, accurate tape A loading operation is required.

Therefore, conventionally, the mechanism section including the tape loading mechanism that drives the tape drawer member between the loading start position and the loading completion position has been manufactured with high precision to achieve high precision drive control. The tape loading operation was ensured, and the reality was that little consideration was given to simplifying the components.

For this reason, in the tape loading device described above, the tape loading mechanism is complicated, and unless it is manufactured with high precision, it is difficult to realize a highly accurate tape loading operation, making the manufacturing process extremely difficult. This has the problem of being troublesome and expensive.

(Problem to be Solved by the Invention) As stated above, in the conventional tape loading device, the manufacturing precision has been improved to achieve accurate tape loading operation. This has the problem of being extremely troublesome and expensive.

This invention was made in view of the above circumstances, and an object of the present invention is to provide a tape loading device that has a simple configuration, can realize accurate operation control, and can be manufactured easily. do.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a tape loading device in which a tape wound in a tape cassette is pulled out and loaded on a cylinder, in which a tape inlet side and a tape outlet side of the cylinder are loaded. first and second guide portions provided correspondingly to the first and second guide portions;
and first and second tape pull-out members that are accommodated in a second guiding portion so as to be freely guided and that load the tape wound around the tape cassette onto the cylinder; and the first and second tape pull-out members. a tape loading mechanism that controls driving between one end of the tape loading start and the other end of the loading completion of the first and second guide parts;
and positioning means for positioning one of the second tape pull-out members to an unloading completion position to position the first and second tape pull-out members, and the first and second tape pull-out members positioned by the positioning means. A biasing means for biasing the tape pull-out member in the loading start direction.

(Function) According to the above configuration, when the first and second tape pull-out members are transferred by the tape loading mechanism, their positions are regulated and positioned at the unloading completion position, and the tape loading operation is completed. Therefore, the first and second
Since accurate positioning of the tape pull-out member is achieved regardless of the manufacturing accuracy of the tape loading mechanism, the manufacturing accuracy of the tape loading mechanism can be reduced and manufacturing efficiency can be simplified.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a VTR to which a tape loading device according to an embodiment of the present invention is applied. FIG. 1(a) shows the top side, FIG. 1(b) shows the side view, and FIG. c) shows the bottom side.

That is, 10 in the figure is a main chassis, and a frame 11 is provided at one end. A cassette holder 12 is supported by the frame 11 so as to be movable in the directions of arrows A and B. This cassette holder 12 is located at the cassette insertion position furthest in the direction of the arrow.
In conjunction with this, the loading drive mechanism 13 of the front loading device is driven to transport the tape cassette C in the direction of arrow B. (not shown) are loaded onto the reel stands 14 and 15 on the tape supply side and tape winding side of the tape drive section.

The reel stand 14.15 has a gear 14a.

15a are provided respectively, and these gears 14a.

A drive gear 1 constituting a tape drive section is located in the middle of the tape drive section 15a.
6 is arranged. This drive gear 16 is supported by one end of a swinging member 17. At the other end of this swinging member 17, a second
As shown, a gear 18 is mounted and meshed with drive gear 16. The gear 18 is provided coaxially with a first gear 19 of the clutch gear mechanism, and this first gear 19 is arranged in a stacked manner with a second single-jaw wheel 21 via a friction member 20. ing. These first and second gears 19.21 include a clutch switching gear 2.
2 are arranged opposite to each other so as to be able to freely approach and separate. This gear 22 is rotatably disposed via a switching slider 23 that is interlocked with an operation mode switching mechanism, and is selectively meshed with the first and second gears 19,21. A pulley 24 is disposed coaxially with the second gear 21 . And pulley 24
One side of the drive belt 25 is wound around the drive belt 25, and the other side of the drive belt 25 is wound around the drive pulley 26 (the first
(See figure (C)). This drive pulley 26 is fitted into a capstan motor 27 that can be rotated freely. A capstan 28 is coaxially provided on the capstan motor 27 , and its driving force is transmitted to the pulley 24 via the drive belt 25 and then to the second gear 21 .

A driving gear 29 is provided around the capstan motor 28.
is provided, and a lifting gear 30 is arranged opposite to this drive gear 29. This elevating gear 30 is connected to the main chassis 10
The switching lever 31 is provided to be movable in the axial direction via a spring mechanism (not shown), and one end of a rotatable switching lever 31 is engaged with the upper surface of the switching lever 31 (see FIG. 3). This switching lever 31
The other end is engaged with a first cam portion 32a formed on one side of a mode switching cam 32 of the operation mode switching mechanism, and the rotation is controlled via this mode switching cam 32, so that the cassette is loaded in the cassette loading state. , one end of which is spaced apart from the lifting gear 30, and the lifting gear 3o is connected to the spring mechanism (not shown).
is raised to mesh with the driving gear 29, and when the cassette loading is completed, it is reversed, and at one end, the lifting gear 30 is lowered in the axial direction against the spring force of the spring mechanism (not shown). and separate it from the drive gear 29.

Further, a pulley 33 is provided coaxially with the elevating gear 30, and one end of a drive belt 34 is wound around the pulley 33. The other end of the drive belt 34 is wound around a pulley 35. This pulley 35 is provided coaxially with the worm 36 (see FIG. 1(a)) of the loading drive mechanism 13, and the rotational force of the capstan motor 27 is
As the elevating gear 30 moves up and down, the signal is selectively transmitted to the pulley 33, drive belt 34, pulley 35, and worm 36 to drive and control the loading drive mechanism 13, thereby transporting the cassette holder 12 as described above.

Further, a helical scan type cylinder 37 equipped with a magnetic head is rotatably disposed in the main chassis 10 in correspondence with the frame 11, and a guide portion for guiding tape loading is provided around the cylinder 37. as the first and second guide holes 38a.

38b are provided corresponding to the tape inlet side and the tape outlet side. These first and second guide holes 38a,
38b, as shown in FIG. 4, there are first and second tape drawer members 39a, which constitute a tape loading mechanism.
39b is movably accommodated. The first and second tape pull-out members 39a, 39b include inclined bosses 40a, 40b substantially parallel to the cylinder 37, and main chassis 10.
Guide rollers 41a and 41b that are substantially perpendicular to each other are mounted in parallel. As shown in FIG.
and a second link mechanism 42a.

42b is connected at one end. The other ends of these first and second link mechanisms 42a and 42b are first and second drive gears 43a that are meshed with each other.

43b. A notched gear 44 is coaxially provided on the second drive gear 43b, and a sector gear 45a formed at one end of the drive lever 45 meshes with the notched gear 44.

The drive lever 45 has an intermediate portion rotatably supported by the main chassis 10 via a rotation shaft 46, and the other end portion is engaged with the second cam surface 32b of the three mode switching cams. . This drive lever 45 is adjusted in position with respect to the second cam portion 32b of the mode switching cam 32, for example, as shown in FIG. They are positioned and assembled in a state where the unloading completion position is brought into contact with the return spring member 46 and the position is regulated.

As shown in FIG. 7, the other second tape pull-out member 39b is positioned at one end of the second guide hole 38b at a predetermined distance δ. Thereby, the drive lever 45 is driven in conjunction with the operation of the mode switching cam 32, and the notched gear 44, the first and second drive gears 43a,
43b, and the first and second tape pull-out members 39a and 39b are driven via the first and second link mechanisms 42a and 42b to perform tape loading. Here, the first and second tape drawer members 39a and 39b are
The first tape pull-out member 39a contacts one end of the first guide hole 38a and is regulated in position, so that the first tape pull-out member 39a is moved toward the loading start position via the spring member 46 while being positioned at the unloading completion position. A spring force is applied. As a result, the first and second drive gears 43
a, 43b, the notched gear 44, and the fan-shaped gear 45a of the drive lever 45 are connected to the first and second tape pull-out members 39a.
, 39b, the spring force of the spring member 46 is applied,
The so-called mutual gnawing is prevented. Therefore, when the mode switching cam 32 is reversed during loading, the first and second tape pull-out members 39a and 39b are connected to the drive lever 45, the notched gear 44, and the first and second gears 43.
a, 43b, first and second link mechanisms 42a, 42b
are smoothly reversed by the spring force of the spring member 46, so that the tape loading operation, which is substantially the opposite of the tape unloading operation described above, is reliably performed.

In this manner, the tape loading device moves the first and second tape pull-out members 39, 39b, which pull out the tape t of the tape cassette C and load it onto the cylinder 37, to the loading completion position. The first guide hole 38a is brought into contact with one end of the first guide hole 38a to restrict its position, thereby positioning it at the loading completion position, and
These first and second tape drawer members 39a.

39b in the unloading completion position, and then release the spring member 4.
6 in the direction of the loading start position, and the first
and a second drive gear 43a.

The 43b1 notched gear 44 and the drive lever 45 are prevented from biting into each other, and a highly accurate tape loading operation can be realized. According to this, accurate positioning is possible regardless of the manufacturing accuracy of the tape loading mechanism including the mode switching cam 32 that drives the first and second tape pull-out members 39a and 39b. The manufacturing accuracy can be reduced, and the manufacturing efficiency can be simplified. Furthermore, a motor with low starting torque can be used as the drive source motor for the tape loading mechanism.

In addition, in the above embodiment, the first tape drawer member 39a
Although the configuration is such that the position is regulated by making the second tape drawer member 39b come into contact with the second guide hole 38b, the present invention is not limited to this. It is also possible to configure it in one direction, and it is also possible to provide it in both directions.

Further, in the above embodiment, the spring member 46 is provided corresponding to the first tape drawer member 39a, but the spring member 46 is not limited to this, and it is also possible to provide it corresponding to the second tape drawer member 39b.

Furthermore, in the above embodiment, a case has been described in which either one of the first and second tape pull-out members 39a and 39b is configured to directly abut the first and second guide holes 38a and 38b. , without limitation, the first and second
It is also possible to provide, for example, an abutment member at the end of the guide portion 38a38b for regulation.

Therefore, it goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As described in detail above, the present invention provides a tape loading device that is made of component parts that can realize accurate operation control and can be manufactured easily. be able to.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a VTR to which a tape loading device according to an embodiment of the present invention is applied, and FIGS. 2 to 7 are diagrams shown for explaining each part of the tape loading device of FIG. 1. It is. 10... Main chassis, 11... Frame, 12...
・Cassette holder, 13...Loading mechanism, 14
゜15... Reel stand, 28... Capstan, 32
...Mode switching cam, 37...Cylinder, 38a. 38b...first and second guide holes, 39a. 39b...first and second tape drawer members, 40a
, 40b - angled post, 41a. 41b...Guide roller, 42a, 42b...First
and second link mechanism, 43a, 43b...first and second drive gears, 44...notch gear, 45...
Drive lever 46... Spring member. Applicant's agent Patent attorney Takehiko Suzue Figure (b) Figure

Claims (1)

[Scope of Claims] A tape loading device in which a tape wound in a tape cassette is pulled out and loaded onto a cylinder, comprising a first and a first tape provided corresponding to a tape inlet side and a tape outlet side of the cylinder. first and second tape drawer members which are accommodated in the first and second guide parts so as to be freely guided and which load the tape wound around the tape cassette onto the cylinder; a tape loading mechanism that drives and controls first and second tape drawer members between one end of the first and second guide sections at which tape loading is started and the other end when loading is completed; and the first and second tapes. positioning means for positioning the first and second tape drawer members by regulating one of the drawer members to an unloading completion position; and loading the first and second tape drawer members positioned by the positioning means. 1. A tape loading device comprising: biasing means for biasing in a starting direction.