JPH11203751A - Magnetic recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily assembled magnetic recording device having simple mechanisms around a capstan and a pinch roller and capable of reducing part costs. SOLUTION: This magnetic recording device is provided with a capstan 51 for traveling a tape 2, a pinch roller 31 for pressing the tape to this capstan, and a pinch roller arm 33 for swinging the pinch roller. The device is further provided with a guide arm 37 for swinging a guide pin 35. The swinging of the pinch roller arm 33 during the pulling-out of the tape and the swinging of the guide arm 37 during tape housing are operated by the pressing force of a screw coil spring 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording apparatus such as a video camera with a home camera. In particular, the present invention relates to a magnetic recording apparatus in which a mechanism around a capstan and a pinch roller is simple, the parts cost is reduced, and assembly is facilitated.

[0002]

2. Description of the Related Art The prior art will be described by taking a magnetic recording device for a video camera as an example. In the magnetic recording apparatus, a magnetic tape contained in a cassette is pulled out and applied to a magnetic drum to read and write information on the magnetic tape. To this end, a mechanism is provided for pulling out a magnetic tape from a cassette loaded in the apparatus and for storing the tape in the cassette when removing the cassette. The operation of pulling out the magnetic tape and applying it to the drum is referred to as loading, the operation of storing the tape in the cassette is referred to as unloading, and the mechanism therefor is also referred to as a tape loading mechanism.

[0003] The tape loading mechanism includes a guide pin, a guide roller, and a pinch roller for guiding the tape. The guide pin is a pin having a surface on which the tape slides, and the guide roller and the pinch roller are rollers that rotate in contact with the tape. The pinch roller presses the tape against the capstan. The capstan is driven to rotate, and the tape sandwiched between the capstan and the pinch roller runs at the same speed as the peripheral speed of the capstan.

The above-described guide pins, guide rollers, and pinch rollers are located in the cassette to be loaded at the unloading position, are located closer to the magnetic drum at the loading position, and move between both positions during loading and unloading. . The moving mechanism for that is realized by a slide mechanism or a swing mechanism. As an example of such a mechanism, a pinch roller arm for swinging a pinch roller and a guide arm for swinging a guide adjacent to the pinch roller are moved by a mechanism using two springs and a cam.

[0005]

The above conventional mechanism has a large number of parts and is complicated. Therefore, the parts cost and the assembly cost are required. The present invention has been made in view of such a problem, and provides a magnetic recording apparatus in which a mechanism around a capstan and a pinch roller is simple, and an improvement is made so as to reduce parts cost and facilitate assembly. The purpose is to do.

[0006]

In order to solve the above-mentioned problems, a magnetic recording apparatus according to the present invention is provided with a magnetic recording apparatus which pulls out a magnetic tape stored in a cassette, applies the magnetic tape to a magnetic drum, and writes / reads information on / from the magnetic tape. A recording device, a rotary drive roller (capstan) for running a tape, a pinch roller for pressing the tape against the capstan, a pinch roller arm for swinging the pinch roller, and a capstan and a pinch roller adjacent to the pinch roller. A guide for guiding the tape, a guide arm for swinging the guide, and a biasing member bridged between the pinch roller arm and the guide arm; a swing of the pinch roller arm when the tape is pulled out; and The swing of the guide arm when the tape is stored is operated by the biasing force of the biasing member. And characterized in that.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an unloading state of a magnetic recording device according to one embodiment of the present invention. The drawing shows the tape cassette 4, the magnetic drum 1, and the like. When the tape 2 is loaded in the magnetic recording apparatus, the tape 2 is substantially straight along the back side (upper side in the figure) of the cassette 4. Guide pins 7, guide rollers 9, guide pins 11, guide pins 25, guide rollers 27, pinch rollers 31, and guide pins 35 are arranged in this order from left to right on the near side of the tape (the lower side in the figure). I have. These four guide pins and two rollers move in the depth direction (upward in the figure) at the time of loading, pull out the tape 2 and press it against the front surface of the magnetic drum 1. The magnetic drum 1 rotates in synchronization with the tape 2. A magnetic head (not shown) is provided on the magnetic drum 1, and the magnetic head reads (or writes) magnetic information on the tape.

The left guide pin 7 on the front side of the tape 2 stands on the guide pin arm 5. The guide pin arm 5 rotates about the fulcrum 5a. The guide pin 7 and the arm 5 function as a tension regulator for the tape 2. The arm 5 is urged to rotate counterclockwise by a spring (not shown). However, in the state of FIG. 1, since the hanging piece 5 b on the back side of the arm 5 is pressed by the guide pin arm contact portion 15 a of the pin slider 15, it is stopped at the illustrated position.

The guide roller 9 and the guide pin 11 are erected on a left coaster (moving table) 13. The left coaster 13 is movable on the left side of the magnetic drum 1 along the guide groove 8 (cut on the magnetic drum base). Similarly, the guide pin 25 and the guide roller 27
It is erected on the right coaster 29. Right coaster 2
9 is movable on the right side of the magnetic drum 1 along the guide groove 28.

A pinch roller 31 is provided on the right coaster 29 slightly to the right of the guide roller 27. The pinch roller 31 is rotatably provided upright at the tip of a pinch roller arm 33. The pinch roller arm 33 has a substantially L-shape, and protrudes like a bird stalk on the rotating shaft 39 at the tip (the upper right part in the figure) of the L-shape short side, and abuts the right side of the coaster 29. . The pinch roller arm 33 is urged clockwise by the torsion coil spring 41 via the pinch limiter arm 43 and the spring 47. The pinch limiter arm contact portion 33b is formed in a stepped shape at the lower right of the L-shaped short side of the pinch roller arm 33. This pin dust limiter arm contact portion 33b is the same as that shown in FIG.
When the head 33 e of the pinch roller arm 33 is pressed as shown in FIG. 2 or FIG. 2, the pinch roller arm 33 is in contact with the protrusion 43 a of the pinch limiter arm 43.

A spring hook 33c is formed at the lower right end of the L-shaped short side of the pinch roller arm 33, and the right end of a pinch roller pressing spring 47 is engaged with the hook 33c. The upper side of the root of the hook 33c is the above-mentioned torsion coil spring contact portion 33b.

The pinch limiter arm 43 also has a rotating shaft 39.
It is a plate-like member that rotates around and is generally triangular. The upper right screw coil spring contact portion 43c of the pin dust limiter arm 43 is connected to one end 4 of the screw coil spring 41.
1b and is urged clockwise. The protrusion 43 a is formed on the pinch limiter arm 43. A hook 43b with which one end of a pinch roller pressing spring 47 is engaged is formed at the lower left end of the pinch limiter arm 43. The spring 47 is a tension spring and urges the pinch roller arm 33 clockwise. However, when the contact portion 33b of the arms 33 and 43 is in contact with the protrusion 44a, the urging force of the spring 47 does not act effectively. A pin 45 is provided upright at the lower left end of the pinch limiter arm 43. This pin 45
The position of the pinch limiter arm 43 for pressing the pinch roller 31 against the capstan 51 is regulated.

The guide pin 35 is located at the upper right of the pinch roller 31 in FIG. The guide pin 35 is provided upright on the left end of the guide arm 37. The guide arm 37 is similar to the pinch roller arm 33 described above, and
It rotates around 9. The guide arm 37 is a substantially rectangular plate-shaped member as a whole. Guide arm 37
A torsion coil spring contact portion 37a is provided upright at the upper right corner of the base end (where the rotation shaft 39 is located) so as to hang downward. One end 4 of the torsion coil spring 41 is provided in the same portion 37a.
The guide arm 37 is urged counterclockwise by the torsion coil spring 41.

The side 37b at the base end of the guide arm 37 is
It is bent downward. A guide arm contact portion 15z at the tip of the upper right projection 15y of the pin slider 15 contacts the lower portion of the side 37b. The pin slider 15
As will be described in detail later, when the tape is loaded, the guide arm abutment portion 15z pushes the front of the base end piece 37b of the guide arm (on the front side with respect to the rotation shaft 39) to the left, and the guide arm 37 Swing clockwise.

The pin slider 15 is a large plate-like member, and slides left and right to move each part when loading / unloading the tape. On the left side of the pin slider 15, a slit 15c extending left and right is opened. A pin 19 is fitted in the slit 15c. On the other hand, a slit 15x extending left and right is also opened on the right side of the pin slider 15. This slit 15x
, A pin 22 is fitted. Therefore, the pin slider 15 has the two pins 19 and 22 and the slits 15c and 1c.
It is structured so that it can be slid left and right guided by 5x.

On the right side of the slit 15c of the pin slider 15, a cam pin 21 is erected downward. The cam pin 21 is fitted in a cam slit 17a cut in the cam gear 17. A gear 17c is cut around the outer periphery of the cam gear 17, and the gear 17c meshes with a drive gear (not shown) driven by a tape loading motor (not shown). As a result, the cam gear 17 is driven to rotate by the tape loading motor when loading and unloading the tape. When the cam gear 17 rotates, the cam pin 21 slides right and left along the cam slit 17a at a timing corresponding to the shape of the slit. The other cam slit 17b cut by the cam gear 17 is for driving a brake slider (not shown).

FIG. 2 is a plan view showing the tape loading mechanism in the middle of pulling out the tape. Cam gear 17
Has rotated about 80 ° counterclockwise from the state shown in FIG. 1, and accordingly, the pin slider 15 has slightly moved to the left. The guide pin arm 5 on the left side of the figure has a guide pin arm contact portion 15a at the upper left of the pin slider 15 that has been moved to the left, so that the guide pin arm 5 is about 6
It has turned 0 °. Accordingly, the leftmost guide pin 7
Is lifted up in the drawing, and the tape 2 is pushed around the pin 7 and pulled out of the cassette 4.

The left coaster 13 has advanced to about half of the left guide groove 8. Also, the coaster 29 on the right
Has advanced to about half of the right guide groove 28. In addition,
Both coasters 13 and 29 are slid by a link-type drive mechanism that is located below the base of the magnetic drum 1.

The pinch roller arm 33 has an L
The head 33e at the tip of the long side of the character is in contact with the lower right side of the right coaster 29, and is urged by the torsion coil spring 41, as shown in FIG.
Has turned slightly clockwise from the state.

The guide arm 37 is rotated about 80 ° clockwise since the guide arm contact portion 15z of the pin slider 15 slides leftward and pushes the guide arm base end piece 37b leftward from the state of FIG. And stands in the back. Therefore, the guide pin 35 pulls the tape 2 upward in the drawing. 2, the tape 2 is in contact with the outer peripheral surface of the magnetic drum 1 on the near side.

FIG. 3 is a plan view showing the tape loading mechanism in a loading state where the tape has been completely pulled out. The cam gear 15 is further rotated counterclockwise by about 120 ° from the state of FIG. 2, and the pin slider 15 is slid to the left. The guide pin arm 5 on the left side of the drawing has an urging spring (ten regi spring, shown in the figure) because the guide pin arm contact portion 15a of the pin slider 15 is separated to the left from the hanging piece 5b of the guide pin arm 5. And can freely rotate counterclockwise.
However, since the guide pin 7 at the tip of the arm 5 is pushed by the tension of the tape 2 and the arm 5 receives a clockwise moment, the arm 5 stops at a position where the tension of the ten regi spring and the tension of the tape 2 are balanced. Reference numeral 3 above the guide pin 7 is a fixed guide pin.

The left coaster 13 advances to the upper end of the left guide groove 8 and enters the upper left of the magnetic drum 1. The tape 2 passes around the guide roller 9 and the guide pin 11, and is wound from the upper left to the front and upper right of the magnetic drum 1. The right coaster 29 advances to the upper end of the right guide groove 28 and enters the upper right side of the magnetic drum 1. Guide pin 25, guide roller 27
Guides the tape 2 to the upper right of the magnetic drum 1.

The pinch roller arm 33 is urged by the torsion coil spring 41 (the pinch limiter arm 43 and the pinch roller pressing spring 47) because the right coaster 29 is located at a position where it does not interfere with the pinch roller arm 33. Te) It has swung to the upper right. The reason why the pinch roller arm 33 is not directly biased by the torsion coil spring 41 is that the pinch limiter arm 43 is easier to design in terms of space. However, a structure for directly energizing may be adopted. The pinch roller 31 at the tip of the pinch roller arm 33 presses the tape 2 against the capstan 51. At this time, the pinch limiter arm contact portion 33b of the pinch roller arm 33,
There is a gap between the pinch limiter arm 43 and the protrusion 43a. The capstan 51 is rotationally driven by a drive mechanism (not shown), and drives the tape 2 to run on the outer peripheral surface thereof.

The guide arm 37 is connected to the pin slider 15.
The guide arm abutment portion 15z merely slides substantially to the left along the guide arm base end piece 37b from the state of FIG. 2, and thus has a posture almost the same as the state of FIG. Thus, the loading operation of the tape 2 is completed.

Next, an unloading operation for storing a tape in a cassette will be described. This operation is the opposite of the loading operation, and proceeds from FIG. 3 to FIG. 2 to FIG. That is, proceeding from FIG. 3 to FIG.
9 goes down. At this time, the right coaster 29
The tip 33a and the head 33e of the pinch roller arm 33 are pushed down, and the pinch roller arm 33 is turned counterclockwise. However, the guide arm 37 has its proximal end piece 3
7b and guide arm contact portion 15z of pin slider 15
The posture does not change because the contact continues.
Such a pinch roller arm 33 and a guide arm 37
, The torsion coil spring 41 is further twisted.

Next, when proceeding from FIG. 2 to FIG. 1, the left guide pin arm 5 is
Is pushed to the right by the guide pin arm contact portion 15a.
Turning clockwise, the guide pin 7 is lowered to the lower right. Also,
The left and right coasters 13 and 29 further descend toward the center. The pinch roller arm 33 is mounted on the right coaster 2.
It is pushed by 9 and goes down a little further.

On the other hand, the guide arm 37 is biased against the torsion coil spring 41 because the guide arm contact portion 15z of the pin slider 15 is protruded to the right of the guide arm base end piece 37b. Then, it rotates about 80 ° counterclockwise. Thereby, the guide pin 35 is lowered to the left front. Thus, the tape 2 is pulled into the cassette 4 and the tape unloading operation is completed. During this time, an appropriate tension is applied to the tape 2 by a cassette reel drive motor.

[0028]

As is apparent from the above description, according to the present invention, the swing of the pinch roller arm when the tape is pulled out and the swing of the guide arm when the tape is stored are operated by the urging force of the urging member. Therefore, it is possible to provide a magnetic recording apparatus in which the mechanism around the capstan and the pinch roller is simple, the parts cost can be reduced, and the assembly is easy.

[Brief description of the drawings]

FIG. 1 is a plan view showing an unloading state of a magnetic recording device according to one embodiment of the present invention.

FIG. 2 is a plan view showing a tape loading mechanism during tape withdrawal.

FIG. 3 is a plan view showing the tape loading mechanism in a loading state in which the tape has been completely pulled out.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magnetic drum, 2 ... Tape, 3 ... Guide pin, 5 ... Guide pin arm, 5a ... Support point, 5b ... Hanging piece, 7 ... Guide pin, 8 ... Guide groove, 9 ... Guide roller, 11 ... Guide pin, 13 ... Coaster, 15 ... Pin slider, 1
5a: Guide pin arm contact portion, 15b: Projection piece, 15c
... Slits, 15x ... Slits, 15y ... Protrusions, 15z
... Guide arm contact part, 17 ... Cam gear, 17a, 17
b: cam slit, 17c: gear, 19: pin, 21 ...
Cam pin, 22 pin, 25 guide pin, 27 guide roller, 28 guide groove, 29 coaster, 31 pinch roller, 33 pinch roller arm, 33a tip end, 33b pin pinch limiter arm contact part, 33c ... spring hook, 33e ... head, 35 ... guide pin, 37 ... guide arm, 37a ... torsion coil spring contact part, 37b ...
Base end piece, 39: rotating shaft, 41: torsion coil spring, 43
... Pin limiter arm, 43 ... a protrusion, 43b ... Hook, 43c ... Torsion coil spring contact part, 45 ... Pin, 4
7 ... Pinch roller pressing spring, 51 ... Capstan.

Claims (2)

[Claims] 1. A magnetic recording device which draws out a magnetic tape stored in a cassette, applies the magnetic tape to a magnetic drum, and writes / reads information on / from the magnetic tape; a rotary drive roller (capstan) for running the tape; A pinch roller for pressing the tape against the capstan, a pinch roller arm for swinging the pinch roller, a guide for guiding the tape adjacent to the capstan and the pinch roller, a guide arm for swinging the guide, and the pinch roller An urging member bridged between the arm and the guide arm; the swing of the pinch roller arm when the tape is pulled out and the swing of the guide arm when the tape is stored are operated by the urging force of the urging member. A magnetic recording device characterized in that the magnetic recording device is operated. 2. The magnetic recording apparatus according to claim 1, wherein the pinch roller arm and the guide arm swing around the same fulcrum, and the urging member is a torsion coil spring having the fulcrum as an axis.