JPS61142557A - Tape loading mechanism for vtr - Google Patents

Abstract

PURPOSE:To add a mode switching function of a tape loading mechanism by rotating a control member and an intermediate member in accordance with the rotation of a driving gear if notches are opposed to the driving gear, and in other cases, rotating the driving ring too. CONSTITUTION:The driving ring 24 having the notches 22 opposed to the driving gear 14 are arranged so as to be engaged with the driving gear 14. Namely, when the notches 22 are opposed to the driving gear 14, the driving ring 24 is not engaged with the driving gear, and when the notches 22 are not opposed to the driving gear 14, the ring 24 is engaged with the gear 14 and rotated. When the driving ring 24 is rotated, a tape loading arm 26 on the ring 24 is moved between a tape loading position and a tape unloading position together with a tape loading post 28 to load/unload the tape.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention intermittently transmits the driving force of the loading motor to the drive ring, and when the drive ring is not rotating, the PLAY/
This invention relates to a tape loading mechanism for a VTR which is configured to change modes other than RECORD mode and is capable of not only tape loading operations but also mode switching.

[Conventional technology]

Known tape loading for VTR 41! All structures have only a tape loading function, FAST, EJ
A known VTR that does not have a mode switching function such as ECT or PLAY/RECORD is provided with a tape loading mechanism and a mode switching mechanism, respectively. Each mechanism is configured with its own components, including a separate drive source. Note that if the mode switching mechanism is switched between PLAY/RECORD and the 7th mode, the tape loading mechanism operates in advance to load the tape, and the PLAY/RECORD
In the CORD 7, the tape loading mechanism and mode switching mechanism are linked.

[Problem that the invention seeks to solve]

Known VTRs with such a configuration have a disadvantage that they are difficult to reduce in size and weight because they are complex and take up space. In addition, since there are many driving sources, there is a drawback that the battery is rapidly consumed, especially in a VTR integrated with a camera that uses a battery.

An object of the present invention is to provide a tape loading mechanism for a VTR that has not only a tape loading function but also a mode switching function.

[Means for solving problems]

To achieve this object, according to the present invention, the driving force of the loading motor is intermittently transmitted to the drive ring, and modes other than the PLAY/RECORD mode are switched when the drive ring is not rotating.

That is, the VTR tape loading mechanism according to the present invention includes a drive ring that meshes with the drive gear driven by the driving force of the loading motor and rotates five times to move the tape loading arm. are doing. A control member for controlling the mode is disposed in mesh with the drive gear. In addition, the control member is PLAY/
A notch is formed in the drive ring to partially prevent meshing between the drive ring and the drive gear in a range where modes other than RECORD are controlled. Furthermore, the control member has the same tooth profile as the drive ring and meshes with the drive gear, and the control member has the same tooth profile as the drive ring.
An intermediary member is disposed so as to be rotatable integrally with the drive ring within a range for controlling the ORD mode.

[Effect]

In such a configuration, if the notch faces the drive gear, the control member and the intermediary member rotate as the drive gear rotates; otherwise, the drive ring also rotates in addition to them. . In the former, random AY/RECO is generated according to the rotation of the control member.
Switched to a mode other than RD, in the latter mode PLAY/R
The ECORD code can be set, and tape loading or unloading is performed according to rotation of the drive ring. That is, mode switching and tape loading are performed appropriately by rotation of the drive gear by the loading motor, and the tape loading mechanism can have a mode switching function in addition to tape lobbing milling.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, a tape loading mechanism 10 according to the present invention includes a loading motor 12 and a drive gear 14, and a worm gear 16 is disposed coaxially with the drive gear. The driving force of the loading motor 12 is
Motor pulley 18, endless belt 19. Worm gear 1B via worm boo IJ20 and worm 21
is transmitted to drive the drive gear together with the worm gear. Note that the configuration for transmitting the driving force of the loading motor 12 to the drive gear 14 is not limited to the illustrated configuration, and other configurations may be used. Further, a WIA dynamic ring 24 having a notch 22 facing the drive gear 14 is arranged so as to be able to mesh with the drive gear. In other words, the driving ring 24 is! i
iT] When the notch 22 faces the drive gear 14, it does not mesh with the drive gear, and when it does not, it rotates in mesh. As the drive ring 24 rotates, the tape loading arm 26 on the drive ring is attached to the tape loading post 2.
A guide groove 3o for guiding the tape loading arm 2B is provided on the chassis (not shown), which moves between the tape loading position and the Qian loading position to perform tape loading or tape unloading. A stopper 31 is also provided for securing the tape unloading position. Furthermore.

An intermediary member 32 is disposed on the drive ring 24, and this intermediary member has the same tooth profile as the drive ring 24 and has substantially the same shape as the arc of the drive ring. And, the intermediary member 32 is a driving gear! 4 and constantly rotates in accordance with the rotation of the drive gear. Further, a pair of elongated holes 34 adapted to the rotating direction of the drive ring 24 are formed in the intermediary member 32.
A pair of guide pins 3B implanted in are loosely engaged in the long holes. Note that the intermediary member 32 is connected to the drive ring 2
Instead of the upper surface of 4, it may be disposed on the lower surface so as not to fall off.

Further, a control member 38 for switching modes is connected to the drive gear 14.
It is arranged in mesh with the The control member 38 is the drive gear 1
Rotates according to the rotation of 4, and switches the mode by rotating to FAST, EJECT, 5TOP, P
Set the mode such as LAY/RECORD. In addition,
The PLAY/RECORD mode includes a 5TILL mode.

Various configurations can be used to switch the mode; for example, the control member 38 has a cam function, moves the pulley appropriately according to the rotation angle in a predetermined direction, and transmits the driving force from the capstan motor to the reel stand. Alternatively, the eject lever may be unlocked depending on the rotation angle of the control member 38 to eject the cassette.

For convenience, 1 display EJECT, 5TOP, FAST, P
Assuming LAY/RECORD on the control member, the mode of display is set when aligned with the output display arrow 40. The control member rotates beyond the display FF and the display P
It is assumed that tape loading is completed when LAY/RECORD is aligned with arrow 40.

Here, the length of the elongated hole 34 of the intermediary member and the display EJECT,
The relationship between 5TOP and FAST is as follows. In other words, the intermediate member 3 is in the range where the right end 35P3 and the left end 37 of the elongated hole abut the guide pin 3B on the drive ring 24, respectively.
2 rotates, arrow 40 indicates FF and EJEC.
The included angles of the elongated hole 34 and the displays FAST and EJECT are determined so that the control member 38 rotates within the range in which T is aligned. Further, when the guide pin 3B is located at the center of the elongated hole 34, the 1 display 5TOP is aligned with the arrow 40.

Note that the notch 22 is indicated by the arrow 40.
When the control member 38 rotates through the range in which the CTs are aligned,
It is formed in a size that opposes the drive gear 14 and prevents the engagement of the drive ring 24.

The operation of the tape loading mechanism 10 having the above configuration will be explained below.

When the mode is in neutral, the display 5TOP of the control member 38 is aligned with the arrow 40, as shown in FIG. 2A. At this time, 1g dynamic rolling 24. Since the notch 22 faces the drive gear 14, it does not mesh with the drive gear 14, and the guide pin 36 is located in the elongated hole 34 of the intermediary member.
It is located in the center of This position of drive ring 24 is equivalent to the tape unloading position.

In FIG. 2A, the drive gear 14 is rotated counterclockwise until the display FAST is aligned with the arrow 4o (see FIG. 2B), and the intermediary member 32 is always in mesh with the drive gear 14. Therefore, it rotates clockwise as the drive gear rotates. Since the drive ring 24 does not rotate, the intermediary member slides on the drive ring 24 and when the control member 38 rotates until the 5 display FF is aligned with the arrow 40, the right end 35 of the elongated hole
The control member 3B, which is in contact with the guide pin 3B, is
While rotating until F is aligned with arrow 40, the operation of switching the mode from neutral to FF is performed. Thereafter, when the drive gear 14 is further rotated counterclockwise, the right end 35 of the elongated hole presses the guide pin 34, and the intermediate member 32 is further rotated clockwise together with the drive ring 24. The drive ring 24 is thus rotated integrally with the drive gear 14, but since the notch 22 is formed only in a part of the drive ring 24, the drive ring 24 is rotated to some extent by the intermediary member 32. After that, the drive ring 24 itself becomes the drive gear 1.
4 and rotated. In other words, the drive ring 24 is
It is rotated integrally by the intermediary member 32, and also rotated by meshing with the drive gear 14. When the drive ring 24 rotates until the tape loading column 2B and the tape loading post 2 move to the tape loading position, the display PLAY/R will appear as shown in FIG. 2C.
ECORD is aligned with arrow 40 and PLAY/RECO
Switched to RD mode.

Returning to the tape unloading position can be accomplished by performing the reverse operation as described above, that is, by rotating the loading motor 12 in the reverse direction and rotating the drive gear 14 clockwise as shown in FIG. 2C. As the drive gear 14 rotates clockwise, the drive ring 24 and the intermediate member 3 mesh with the drive gear.
2 rotate integrally in the counterclockwise direction. here,
Since the right edge 35 of the long hole is in back contact with the guide pin 3B,
No driving force is transmitted from the intermediary member 32 to the drive ring 24, and the drive ring 24 rotates due to meshing with the drive gear 14. Of course, the intermediary member 32 rotates by meshing with the drive gear 14. As the drive ring 24 rotates together with the intermediary member 32, the tape loading arm 26 and the tape loading post 2 follow the opposite course, and the tape loading arm comes into contact with the stopper 31, resulting in the initial state shown in FIG. 2A. It returns to the position and tape unloading is performed. Immediately before the drive ring 24 returns to its initial position, due to the presence of the notch 22, the drive ring and the drive gear 14 are disengaged, and the rotation of the drive gear is temporarily stopped.

However, the intermediary member 32 continues to rotate and slide on the drive ring 24, and the display 5TOP of the control member 38 changes to the arrow 40.
Stop the loading motor 12 when the J-
let Here, a rotary encoder is provided adjacent to the control member 38, and the rotary encoder is operated in accordance with the rotation of the control member to ensure that the rotation of the drive gear 14 is stopped when the display 5TOP is aligned with the arrow 40. It is preferable to control the drive of the loading motor 12 so that the drive ring 24 returns to its initial position through the notch 2.
When the drive ring 24 rotates to the position where the drive gear 14 faces the drive gear 14, the drive ring is in a free state. If a steel ball, which is provided on the circumferential surface of the drive ring 24 and acts as a cam surface, is suppressed by the spring force in this notch, the drive ring can be forcibly returned to the initial position. Here, conversely, a configuration may be adopted in which a cam surface is formed on the circumferential surface of the drive ring 24, and the spring force must be set to a magnitude that does not prevent the drive ring from being rotated by the intermediary member 32. Needless to say, when the display 5TOP of the control member 38 is aligned with the arrow 40, the drive ring 24 has already returned to its initial position, and the guide pin 36 of the drive ring is located at the center of the elongated hole 34 of the intermediate member. are doing.

To eject the cassette, the control member 38 can be rotated counterclockwise without rotating the drive ring 24 in FIG. Rotate drive gear 14 clockwise until aligned with arrow 40.

Since the notch 22 faces the drive gear 14, the drive ring 24 does not mesh with the drive gear and cannot be rotated once.On the other hand, the intermediary member 32 rotates counterclockwise due to the mesh with the drive gear 14. Rotate. However, since the guide pin 3B is not in contact with the left edge 37 of the elongated hole, the intermediary member 32 slides on the drive ring 24 until the 0 display EJECT, which does not transmit driving force to the drive ring, is aligned with the arrow 40. ,wJ
When the A moving gear 14 is rotated clockwise, the left edge 37 of the elongated hole
abuts the guide pin, but the control member 38. The intermediary member 32 does not rotate, so the left edge 37 is connected to the idle pin 3.
6 to rotate the drive ring 24 together with the intermediary member. While the 0 display EJECT is rotated until it is aligned with the arrow 40, the control member 38 locks the lock lever by, for example, its cam mechanism. Release it and eject the cassette.

Note that the guide pin 36 is connected to the right edge 35 and left edge 37 of the elongated hole.
In order to prevent a phase shift of the intermediary member 32, the included angle with respect to the center of rotation in the range where the intermediary member 32 contacts is set to correspond to an integral multiple of the gear pitch of the intermediary member.

To return from the EJECT mode to the 5TOP mode, as described above, insert the guide pin 36 in the center of the elongated hole 34 of the intermediary member.
The drive gear 14 may be rotated so that the position is located.

In order to reliably prevent the phase shift of the intermediary member 32 due to the self-weight of the vibration 2, etc., in the embodiment, the intermediary member is configured to be sufficiently long so that the drive gear 1 remains at the rotation limit of the drive ring 24.
4 is interlocked with an intermediary member.

However, as shown in FIGS. 3 and 4, a pair of elongated holes 34 are provided adjacent to each other, and the friction plate 4 is arranged so that the notch at the end engages with each guide pin 36.
Even in such a configuration, in which the intermediary member 32 is rotated in any direction, it is subjected to friction and one phase shift is prevented.

For example, a switch or a rotary encoder is arranged adjacent to the control member 38 to operate in accordance with each mode determined by the rotation of the control member, so that even if the power is turned off, the original mode can be restored by turning the power back on. Preferably, the control member 38 has system control functions such as:

In the embodiment, the control member 38 is provided on a separate axis from the drive ring 24, but the control member may be arranged coaxially with the drive ring, and the EJECT and FAST modes can be distributed to both sides of the 5TOP. PLAY/REC;OR
Although the D mode is set to the FAST side, the mode may be set to other forms, for example, PLAY/RECO
It may also be RD, 5TOP, FAST, or EJECT.

〔Effect of the invention〕

As described above, the VTR tape loading mechanism according to the present invention includes a drive ring that rotates in mesh with the drive gear driven by the driving force of the loading motor, and moves the tape loading arm by rotating. Equipped with and.

A control member for controlling the mode is disposed in mesh with the drive gear. In addition, the control member is PLAY/RE (:ORD
In addition to the mode, there is a notch that partially prevents the meshing of the drive ring and drive gear in the range where the mode is controlled.

formed in the drive ring. Furthermore, the control member has the same tooth profile as the drive ring and meshes with the drive gear, and the control member is PLAY/
An intermediary member is rotatably disposed integrally with the drive ring within a range for controlling the RECORD mode.

In such a configuration, if the notch faces the drive gear, the control member and the intermediary member rotate as the drive gear rotates; otherwise, the drive ring also rotates in addition to them. . In the former, PLAY/REC is controlled according to the rotation of the control member.
The mode is switched to a mode other than the ORD mode, and in the latter mode, the PL
The mode is switched to AY/RECORD, and tape loading is performed in accordance with the rotation of the drive ring. In other words, the driving force of the loading motor is intermittently transmitted to the drive ring, and when the drive ring is not rotating, the PLAY/R
EIII: Switching to a mode other than OI'ID mode is being performed. and.

Mode switching and tape loading are performed appropriately by rotation of a drive gear by a loading motor, and the tape loading mechanism can have a mode switching function in addition to a tape loading function. Therefore, a specific power source for mode switching can be omitted, and the number of components can be reduced accordingly. Therefore, it is possible to simplify the structure and reduce the size and weight. Also, battery consumption can be prevented.

The above-mentioned embodiments are for illustrating this invention, and are not intended to limit this invention in the same way, and any modifications, modifications, etc. made within the scope of technique #j of this invention are also included in this invention. Needless to say, it is included.

[Brief explanation of drawings]

Fig. 1 is a plan view of the JTR tape loading mechanism according to the present invention, Fig. 2 is a schematic plan view of the tape loading mechanism showing operations for setting each mode and tape coding, and Fig. 3 is a plan view of the tape loading mechanism for JTR according to the present invention. A schematic partial plan view of the tape loading mechanism, FIG. 4, showing a modification example for preventing phase shift of the intermediary member, is taken along the line -ff in FIG. 3. 10: VTR tape loading mechanism, 12: loading motor, 14: drive gear, 2
2: Notch, 24: Drive ring, 26: Tape loading arm, 28: Table loading post, 32:
Intermediary member, 34: long hole, 35: right edge of long hole, 38 guide pin, 37: left edge of long hole, 38: control member, 40: arrow, 42: friction plate.

Claims (4)

[Claims] (1) A drive gear driven by the driving force of a loading motor, and a drive ring that meshes with the drive gear and rotates to move the tape loading arm between a loading position and an unloading position. In a tape loading mechanism for a VTR, there is a control member that controls the mode by meshing with the drive gear and rotating, and a control member formed on the drive ring that controls the PLAY/REC mode.
A notch that partially prevents the meshing with the drive gear within the range of controlling modes other than ORD, and a meshing control member that has the same tooth profile as the drive ring and meshes with the drive gear is PLAY/RECOR.
A tape loading mechanism for a VTR, further comprising an intermediary member rotatable integrally with the drive ring within a range for controlling the D mode. (2) A guide pin is implanted in the drive ring, and a long hole in which the guide pin is loosely engaged is provided in the intermediate member, and the edge of the long hole abuts and presses the guide post, so that the intermediate member can be moved within a predetermined range. A tape loading mechanism for a VTR according to claim 1, which is rotatable integrally with the drive ring. (3) A tape loading mechanism for a VTR according to claim 1 or 2, wherein the intermediary member meshes with the drive gear over the entire range in which the drive ring rotates for tape loading. (4) A pair of elongated holes are formed adjacent to each other, and a friction plate is loosely engaged with the guide post in each elongated hole, so that friction is applied to the intermediary member even when the intermediary member rotates in either direction. A tape loading mechanism for a VTR according to any one of claims 1 to 3.