JPH04205953A - Tape recorder device - Google Patents

Abstract

PURPOSE:To lighten the load of a motor for driving a loading mechanism and to miniaturize the device on the whole and also to reduce the cost by improving the shape of a guide groove on a chassis. CONSTITUTION:One pair of guide grooves 1A and 1B possess at least two bends between a 1st position and a 2nd position respectively, and a crossing angle theta1 formed by guide lines between the individual bends of the guide grooves 1A and 1B and the 1st position is made larger than a crossing angle theta2 formed by guide lines between the individual bends and the 2nd position. Consequently, rotating force given to the loading mechanism can efficiently be converted into driving force in the linear direction. By this method, the load of a driving source for driving the loading mechanism is lightened, and the device can be miniaturized, reducing its cost.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a compact tape recorder, a VT
The present invention relates to tape recorder devices such as R (video tape recorder) and DAT (digital audio tape recorder).

(Prior Art) In recent years, tape recorder devices that record and play back signals using audio/visual video cassettes have become popular, and recently tape recorders that can record and play back digital signals using DAT cassettes have become popular. The device has also been commercialized.

In this tape recorder device, the tape in the DAT cassette is pulled out from within the DAT cassette by a loading mechanism, and is wound around a rotating head drum at a predetermined angle and length, where signal recording and playback are performed. .

By the way, a part of the above-mentioned loading mechanism has two positions along two guide grooves provided in the chassis: a first position when the tape cassette is installed, and a second position where signals can be recorded and played back on the tape. It is designed to move between.

(Problems to be Solved by the Invention) However, as will be explained later in the embodiments, the loading mechanism is composed of a rotatable triple structure of, for example, a loading arm, a loading link, and a slide base, and the loading mechanism is configured to rotate in conjunction with the rotation of the loading arm. If the slide base has a structure that converts the motion into a linear motion along the guide groove, especially near the start of movement from the first position,
The problem is that the rotational force of the loading arm cannot be efficiently used as driving force for the slide base, and an extra load is applied to the drive source that rotationally drives the loading arm.

The present invention was made to solve such problems,
The object of the present invention is to provide a tape recorder device that can reduce the size and cost of the device by reducing the load on the drive source that drives the loading mechanism.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the tape recorder device of the present invention includes a rotary head for recording and reproducing signals on a tape housed in a tape cassette; A loading mechanism that pulls out the tape from a tape force center to a position where it contacts a rotating head to form a tape running path, and a second position that allows this loading mechanism to be placed in a first position when a tape cassette is installed and a second position that can record and reproduce signals on the tape. In the tape recorder apparatus, the pair of guide grooves each have at least two guide grooves between the first position and the second position. It has a bent part, and the intersection angle of each guideline between each bent part and the first position of each guide groove is larger than the intersection angle of each guideline between each bent part and the second position. It is characterized by

(Function) In the tape recorder device of the present invention, by forming each guide groove of the chassis in the above-described shape, it is possible to efficiently convert the rotational force given to the loading mechanism into linear driving force. As a result, the load on the drive source that drives the loading mechanism is reduced, and the device can be downsized and cost reduced.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view for explaining the configuration of a tape recorder device according to an embodiment of the present invention.

In the figure, 1 indicates the main chassis. On this main chassis 1 is a DAT cassette (not shown).
A cylinder drum 3 equipped with a rotary head drum for recording and reproducing digital signals on a tape 2 stored in the cylinder drum 3, a capstan shaft 4, a first guide roller 5, and a cylinder drum for transferring the tape 2 from a DAT cassette. The tape 2 is pulled out to a position where it contacts the circumferential surface of the tape 2 at a predetermined angle and length, and is supported by a loading mechanism equipped with various roller groups that maintain the running path of the tape 2 thereafter.

This loading mechanism can be broadly divided into first and second loading mechanisms.
It consists of a movable mechanical section and a control mechanism section that controls each of these movable mechanical sections.

The first movable mechanical part has a pinch roller 6 attached to the capstan shaft 4 at one end, and a pinch roller support lever 8 rotatable around a shaft 7 fixed to the main chassis.
, a pinch roller pressure lever 10 which is rotatable about the shaft 7 and which applies pressure in the direction of arrow A1 to the pinch roller support lever 8 by the force of the coil spring 9; and a second guide roller 11 at one end. and main chassis 1
The pinch roller support lever 8 is centered around the shaft 12 fixed to the
and a guide roller support lever 13 that rotates as the roller rotates.

In this ml movable mechanical part, a guide shaft 10a is fixed to one end of the pinch roller pressurizing lever 10, and this kite shaft 10a slides in the directions of arrows B1 and B2 on a mechanical chassis (not shown). It engages a cam groove 22a of the control slider 22, which is supported thereon.

Thereby, the pinch roller pressurizing lever 10 is rotated about the shaft 7 by the movement of the control slider 22.

The second movable mechanical part includes loading arms 32A and 3 that support at one end a pair of loading gears 31A and 31B that mesh with each other on the back side of the main chassis 1, respectively.
2B, and a guide groove IA provided in the main chassis 1,
The guide rollers 33A, 33B and the inclined guide bin 34A are movable along the IB
Slide bases 35A and 35B equipped with , 34B
and loading links 36A, 36B that connect loading arms 32A, 32B and slide bases 35A, 35B, respectively.

In addition, in this second movable part, loading arms 32A, 32B and loading links 36A, 36B,
The slide bases 35A, 35B and the loading links 36A, 36B are rotatably connected to each other via rotation shafts.

Further, one (31B) of the pair of loading gears 31A and 31B is meshed with a gear of a loading lever 42 rotatably supported on a mechanical chassis (not shown) around a shaft 41. . The loading lever 42 and the control slider 22 are rotated and slid by a mode switching cam 44 rotatably supported on a mechanical chassis (not shown) about a shaft 43.

That is, this mode switching cam 44 is provided with cam grooves 44a and 44b corresponding to the loading lever 42 and the control slider 22, respectively.
The loading lever 42 and the guide shafts 42a, 22b of the control slider 22 are respectively engaged with the guide shafts 4a, 44b. The mode switching cam 44 is also provided with a cam groove (not shown) for controlling switching of the tension servo mechanism.

As a result, the first movable portion operates through the sliding movement of the control slider 22, and the pinch roller 6 on the pinch roller support lever 8 moves to a position where it is pressed against the capstan shaft 4. At the same time, the second movable part operates through the rotation of the loading lever 42, and the slide bases 35A and 35B slide toward the cylinder drum 3 along the guide grooves IA and IB provided in the main chassis 1. do. As a result, the tape 2 is wound around the circumferential surface of the cylinder drum 3 at a predetermined angle and length, making it possible to record and reproduce signals.

Note that the mode switching cam 44 is rotationally driven by a motor (not shown) through a driving force transmission means (not shown) such as a connecting gear or a worm gear.

Furthermore, although not shown, a reel motor pace equipped with two reel motors is fixed between the main chassis 1 and a mechanical chassis (not shown). A tape supply reel 50 and a tape take-up reel 51 are attached to each reel motor via a reel rotation support shaft, and the tips of these tape supply reels 50 and tape take-up reels 51 are connected to the main chassis 1. protrudes from the surface of

Although not shown, this tape recorder device also includes a tape tension detection mechanism that detects the tension of the tape 2 on the tape running path, and a tape supply reel that detects the tape tension detected by the tape tension detection mechanism. A brake mechanism and the like for applying braking to the rotary drive of 50 are also provided.

Next, the guide grooves IA and IB provided in the main chassis 1, which are characteristic parts of this tape recorder device, will be explained using FIG. 5.

As shown in the figure, the main chassis 1 includes guide rollers 33A, 33B, inclined guide pins 34A, 3, respectively.
Each slide base 35A, 35B equipped with 4B is
A pair of guide grooves IA and IB are provided for guiding between a first position when the AT cassette is installed and a second position where signals can be recorded and reproduced on the tape 2. Note that the figure shows a state in which each slide base 35A, 35B is in the second position where signal recording/reproduction is possible. Each of the guide grooves IA and IB has a substantially symmetrical planar shape, and there are two grooves between the first position and the second position.
Two bends are formed.

The intersection angle θ1 of each guideline between the bent portion and the first position of each guide groove IA, IB is set to be larger than the intersection angle θ2 of each guideline between the bent portion and the second position. .

Next, the operation of this tape recorder device will be explained with reference to FIGS. 2 to 5.

FIG. 2 shows a state in which a DAT cassette is installed in this tape recorder device.

As shown in the figure, at this time, each slide base 35A
, 35B, the guide rollers 34A, 34B, the 1-pin roller 6, and the second guide roller 11 are housed in a loading mechanism insertion opening (not shown) in the DAT cassette 60.

After 2, in FIG. 1, when the mode switching cam 44 is rotated in the direction of arrow D1 by the drive of a motor (not shown),
By rotating the loading lever 42 in the direction of arrow E1 and rotating each loading gear 31A, 31B while meshing with each other, the rotational force of each loading arm 3
2A, 32B and each loading link 36A, 36
is transmitted to the slide bases 35A and 35B through B,
As a result, the slide bases 35A, 35B move toward the cylinder head 3 along the guide grooves IA, IB provided in the main chassis 1, as shown in FIGS. 3 to 5.

In addition, in parallel with this operation, the arrow D of the mode switching cam 44
The rotation in one direction moves the control slider 22 in the direction of arrow B1, and as a result, the pinch roller support lever 8 rotates in the direction of arrow A1, and the pinch roller 6 comes into pressure contact with the capstan shaft 4 with the tape 2 in between.

As a result, the tape 2 is wound around the circumferential surface of the cylinder head 3 at a predetermined angle and length, and the first guide roller 5 and the guide roller on the slide base 35B are 33B
The slope on the inclined guide bin 34B1 and the slide base 35A is formed by the idling bin 33A, the guide roller 34A1, the capstan shaft 4, the pinch roller 6, and the second guide roller 11.

Furthermore, in parallel with this operation, the tension servo function starts operating.

After this, the tape supply reel 50, the tape take-up reel 51
, and the capstan shaft 4, tape running is started, and signals are recorded and reproduced on the tape 2.

During this time, the tension of the tape 2 is always detected by the tension detection mechanism, and braking corresponding to the detected tension is applied to the tape supply reel 50 through the brake mechanism.

By the way, in order to efficiently convert the rotational force of each loading arm 32A, 32B into the propulsive force of slide base 35A, 35B, the angle of B3 (loading arm 32A ,3
2B center line and loading links 36A, 36B
The intersection angle with the center line of B) is as close to 90 degrees as possible,
It is desirable that the angle be as close to 0 degrees as possible (the angle of intersection between the center lines of the loading links 36A, 36B and the center lines of the slide bases 35A, 35B).

Therefore, in this embodiment, as described above, each guide groove I
2 between the first and second positions of A and IB, respectively.
two bent portions are provided, and the intersection angle θ1 of each guideline between the bent portion and the first position of each guide groove IA, IB is made larger than the intersection angle θ2 of each guideline between the bent portion and the second position. Secondly, we are trying to get it close to the above conditions.

Thus, according to the tape recorder device of this embodiment, the guide groove IA is provided in the main chassis 1.

These guide grooves IA and IB are simply improved in the shape of IB.
The second result is that the load on the drive motor can be minimized when guiding the loading mechanism along the
The motor can be made smaller, and the entire device can be made smaller and costs can be reduced.

In the above embodiments, the tape recorder device using a DAT cassette has been described, but the present invention can also be applied to a tape recorder device using a videotape.

[Effects of the Invention] As explained above, according to the tape recorder device of the present invention, by simply improving the shape of the guide groove of the chassis, the load on the motor that drives the loading mechanism can be reduced, and as a result, It is possible to reduce the size and cost of the entire device.

[Brief explanation of the drawing]

FIG. 1 is a plan view for explaining the configuration of a tape recorder device according to an embodiment of the present invention, FIG. 2 is a plan view showing a DAT cassette installed in the tape recorder device of FIG. 1, and FIG. 5 to 5 are plan views for explaining the operation of the loading mechanism and the shape of the guide groove for guiding the loading mechanism in the tape recorder device of FIG. 1, respectively. DESCRIPTION OF SYMBOLS 1... Main shear, 2... Tape, 3... Cylinder tram, 6... Pinch roller, 8... Pinch roller support lever, 10... Pinch roller pressurizing lever, 11
...Second guide roller, 13...Guide roller support lever, 22...Control slider, 31A, 31B.
...Loading gear, 32A, 32B...Loading arm, 33A, 33B...Guide roller, 34A,
34B... Inclined guide bin, 35A135B... Slide base, 36A, 36B... Loading link. Applicant Toshiba Corporation Representative Patent Attorney Sasa Suyama −

Claims (1)

[Scope of Claims] A rotating head that records and reproduces signals on a tape stored in a tape cassette, and a loading mechanism that pulls out the tape from the tape cassette to a position where it contacts the rotating head to form a tape running path. and a chassis having a pair of guide grooves for guiding the loading mechanism between a first position when the tape cassette is installed and a second position where signals can be recorded and played back on the tape. In the device, each of the pair of guide grooves has at least two bent portions between the first position and the second position, and each of the pair of guide grooves has at least two bent portions between the bent portion and the first A tape recorder apparatus characterized in that an intersection angle of each guideline between the bending portion and the second position is larger than an intersection angle of each guideline between the bending portion and the second position.