JPS62232753A - Magnetic recording and/or reproducing device - Google Patents

Abstract

PURPOSE:To attain a relaxing operation by a simplified mechanism, by releasing a load on a supply side reel feather by operating a tension arm and a head base, when a pole base is moved from a stop position to a load completing position. CONSTITUTION:In the moving process of a pole base 48 on a supply side from the stop position to a tape load completing position, the relaxing state of a tension band 114 interacting on a supply side reel feather 127 is generated by operating in order a head base 123 on which a tension arm 119, and an overall width erasing head 116 are loaded. And when the pole base 48 arrives at the load completing position, the tension band 114 interacts on the supply side reel feather 127 by the restoring operation of the tension arm 119, by relaxing the connecting state of the head base 116 generated by the pole base 48, thereby, a tape is prevented from being relaxed, and also, back tension is applied on the tape.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a magnetic recording and/or reproducing device that records or reproduces magnetic tape by winding it around a guide drum, and particularly relates to a magnetic recording and/or reproducing device that performs recording or reproducing by winding a magnetic tape around a guide drum. The present invention relates to a magnetic recording and/or reproducing device in which a tension arm can be smoothly operated with a small number of parts.

(Prior Art) Currently, efforts are being made to further reduce the size of current household video tape recorders (VTRs) without changing the recording pattern on the magnetic tape. One of the ideas for downsizing VTRs is to wrap the magnetic tape around a guide drum at approximately 270 degrees, exceeding the current approximately 180 degrees, and to wrap the video head four times at 90 degree intervals. There is a concept of reducing the diameter of the guide drum to two-thirds of the current diameter by providing the same number of guide drums, thereby reducing the diameter of the guide drum and making the VTR more compact.

In order to be compatible with the Eiko model, in addition to matching the video signal recording pattern on the magnetic tape, it is also necessary to make the audio from the guide drum of the magnetic tape so that the tracking servo is performed in the same way. - It is necessary to match the length along the tape path to the control head (A/C head) with the standard length.

Therefore, the applicant company reduced the diameter of the guide drum as described above and wound the magnetic tape symmetrically around the guide drum so that the length of the tape up to the A/C head coincided with the standard length. A magnetic recording and/or reproducing apparatus was proposed, for example, in Japanese Patent Application No. 127083/1983.

This type of magnetic recording and/or reproducing device uses a tension arm to prevent damage to the magnetic tape during tape loading, in which the attached tape cassette is spliced and wound around a guide drum over a predetermined angle range. works,
It is necessary to relax the tension band acting on the supply reel feather. At the end of loading, this tension band acts on the supply side reel feather again to prevent the tape from loosening, and also acts on it with battenion. Furthermore, when unloading the tape, the Tensicon arm must be evacuated from the movement path of the pole base on which the O-ding pole is mounted.

(Problems to be Solved by the Invention) By the way, in the conventional apparatus described above, there are many mechanisms for operating the tension arm to release the load on the tension band acting on the supply side reel feather during tape loading and unloading. This was done using component parts.

That is, for example, when loading a tape, the relay lever is rotated by rotating the cam gear and moving the play bar disposed on one side of the device, and the tension arm lever is further moved by the rotation of the relay lever. By rotating the tension arm disposed on the other side of the device, the tension band acting as a load on the supply side reel feather is once relaxed.

In this way, the tension arm is operated by multiple parts to once loosen the tensicon band during tape loading, which complicates the mechanism and reduces productivity. The need to secure space was a factor that hindered the miniaturization and weight reduction of equipment. Moreover, with the above configuration, el
There were problems such as an increase in the size of the vessel and an increase in cost.

Furthermore, the problem arises that the power consumption of the motor increases due to the increase in the number of component parts.

(Means for Solving the Problems) Therefore, the present invention has been made in view of the above problems, and provides a magnetic tape 2 that is pulled out from a tape cassette 1 installed in an apparatus, and is equipped with a rotating magnetic head. The magnetic tape 2 is placed on the entrance side and the exit side with respect to the guide drum 11.
I will guide you! [! A supply side loading means 33 and a take-up side loading means 28 are provided, each having a pole base 48.57 on which a straight pole 46.58 and an inclined pole 47.59 are mounted. In a magnetic recording and/or reproducing device formed by winding over an angular range, a full-width erase head 1
Head base 123 equipped with 16 and powered by rotational force
a supply reel feather 127 that rotatably supports the supply reel hub 6 of the tape cassette 1; a control member 114 that controls the rotation of the supply reel feather 127; and one end attached to the pole base 48 and the head base 123. The pole base 48 is placed in a position where it can be locked and is connected to the control member 114 at its other end, and has a tension arm 119 to which rotational force is applied to the other end, so that the pole base 48 can move the tape from the stop position. When moving to the loading end position, the pole base 48 operates the tension arm 119 and the head base 123 to release the load on the supply reel feather 127 caused by the control member 114. The present invention provides magnetic recording and/or reproduction IT.

(Function) During the process shown in FIGS. 16(A) to (C) in which the pole base 48 on the supply side moves from the stop position shown in FIG. 1 to the tape loading end position shown in FIG. 13, the tension arm 119 and The head base 123 equipped with the full-width erasing head 116 is sequentially operated to relax the tension band 114 acting on the supply side reel feather 127, and when the pole base 48 reaches the loading end position, the pole base 48 is released, the tension band 114 acts on the supply side reel feather 127 by the return operation of the tension arm 119, thereby preventing the tape from loosening and applying pack tension to the tape. let

Further, smooth and high responsiveness can be obtained with a small number of parts, and the load acting on the capstan motor 83 can be reduced to reduce power consumption. Furthermore, the simplification of the mechanism allows the desired operation to be performed in a small space, contributing to miniaturization and weight reduction of the device.

(Example) First, before explaining the magnetic recording and/or reproducing device according to the present invention, the configuration of a tape cassette applied to the device according to the present invention will be explained.

FIG. 9 shows a small tape cassette 1 used by being attached to the magnetic recording and/or reproducing apparatus of the present invention. This small tape cassette 1 includes a cassette housing 3 that stores a magnetic tape 2, and a cassette housing 3 that can be freely opened and opened on the front side of the cassette housing 3. The small tape cassette 1 is guided by left and right guide rollers 5. M4 protects the magnetic tape 2.

In this tape cassette 1, a supply reel hub 6 is fitted into a supply side reel feather of a device 10, which will be described later, and a gear portion 7a on the outer peripheral surface of a take-up reel hub 7 is connected to a drive gear (indicated by reference numeral 100 in FIG. 2) of the device. ) and are engaged with the recessed portions 3a and 3b on the front side of the cassette housing 3.

3C, with the vertical and inclined loading poles and capstans, etc., described below, relatively fitted in, and 114
is rotated to a horizontal position and is attached to the magnetic recording and/or reproducing apparatus 10 with the lFl lid closed.

1 to 5 show a preferred embodiment of the magnetic recording and/or reproducing device v1110 according to the present invention, and each shows a stop mode state when a tape cassette is loaded. and/or a schematic plan view excluding tape guide means such as a loading ring of the playback device 10, a second
The figure is a right side view of Fig. 1, Fig. 3 is a plan view showing the pole base drive system including the loading ring, Fig. 4 is a plan view showing the tape reel drive system including the capstan, and Fig. 5 is the top view showing the tape reel drive system including the capstan. It is a longitudinal cross-sectional view of the reel drive mechanism shown in the figure.

In each figure, a magnetic recording and/or reproducing device 10 includes a tape loading mechanism 15 for pulling out a magnetic tape and winding it around a guide drum 11 at a predetermined angle, and a tape loading mechanism 15 for driving the tape loading mechanism 15 and for running the tape. A gear mechanism 16 consisting of a plurality of gears that corrects the surface of the tape and drives a middle pole that serves as a tape guide.
and a reel drive mechanism 17 for driving the tape reel of the tape cassette 1, all of which are provided on a chassis base 14.

In each of FIGS. 1 and 2, 11 is a tape guide drum (guide drum) in which, for example, four video heads (rotating heads) are arranged at 90 degree intervals. It is composed of an upper drum 12 which is rotatably driven with wrapped. The video head operates by sequentially switching the tape attachment angle range as a negative operation unit, and the same track pattern as the current one is formed on the magnetic tape 2. Further, since the magnetic tape is wound as described later, the guide drum 11 remains inclined at a predetermined angle (approximately 10 degrees) in the X-x axis direction with respect to the vertical axis, and the inclination angle is small. Therefore, there is almost no increase in the occupied area and height due to the inclination, and the occupied area of the idle drum 11 within the apparatus 110 is small.
becomes small.

Further, the details of the installation state of this guide drum 11 are shown in FIG. 6, as shown in FIG. A plurality of leg portions 13a1 to 13a4 having sequentially different lengths can be integrally formed at the lower part of the lower drum 13 so as to correspond to the inclination angle and direction of the guide drum 11. Therefore, this guide drum 1
1 is connected to the chassis base 14 with its legs 13a1...
・If 13a4 is fixed directly with screws 18 etc., it can be installed while maintaining the predetermined angle of inclination, so high installation 71
The guide drum 11 can be installed in a small space to secure space for other mechanical mechanisms on the chassis base 14, and can also reduce the weight and cost of the device due to the reduction in the number of parts. It will make a contribution.

A tape loading mechanism 15 and a gear mechanism 16 that perform so-called parallel loading are both driven by a single loading motor 19 that can rotate in two directions, forward and reverse. One loading motor that directly drives these 11 vehicles t[M16 is shown in FIG.

As shown in Fig. 2 and Fig. 7, the worm gear 2 of the motor shaft
0, a worm wheel 21 that meshes with this worm gear 20, and a small gear 2 that is coaxial with this worm wheel 21.
2 meshes with the large gear 24 of the terminal gear assembly 23 to drive the terminal gear assembly 23 at a reduced speed.

The shaft gear 23a of the terminal gear assembly 23 is configured to rotationally drive a cam gear 26 that is integrated with a cam tooth rJ machine side 25 that drives a middle pole 39, which will be described later.

In addition, an intermediate gear 27t of the terminal gear structure 23 and a lower annular winding side loading gear (winding gear) 28 disposed in upper and lower stages of the tape loading mechanism 15 are provided.
This is driven to rotate counterclockwise around the guide drum 11 shown in FIG.

Then, the take-up gear 28 decelerates and drives the large gear 31 of the gear assembly 30 that meshes with the idle gear 29, thereby reducing the speed of the canine gear. Koyama ll3 that is one with $I31
2 is driven, the supply side loading gear (supply gear) 33 on the upper side of the tape loading mechanism 15, which is meshed with the small gear 32, is decelerated clockwise. Therefore, when the loading motor 19 is driven in normal rotation, its rotational driving force decelerates the take-up gear 28 at a predetermined speed via the worm wheel 21 and the terminal gear structure 23, and also decelerates the take-up gear 28 at a predetermined speed. Idle tooth 1 by drive! ! By decelerating the gear assembly 30 again via the gear mechanism 29, the supply gear 33 is moved clockwise around the guide drum 11 shown in FIG. (clockwise). This difference in the number of turns and the rotational speed of the supply gears 28 and 33 is due to the length of each movement path of the pole base, which will be described later.

Reference numeral 34 denotes an arm gear, and as shown in FIG. 16, a pin 35 installed at one end of the arm gear is engaged with a spiral cam groove 26a formed in the cam gear 26, and (l! !The fan-shaped gear 34a formed at the end meshes with the shaft gear 37 of the pole arm 36, which has an angled middle pole 39 upright at one end, and rotates counterclockwise about the pivot shaft 38.

Further, a lock arm 41 is integrally attached to the arm gear 34 and has a pivot shaft 40 provided upright from the arm gear 34 as a pivot point. When the arm gear 34 rotates counterclockwise due to the rotation of the cam gear 26 driven by the loading motor 19, one end of the lock arm 41 faces onto the idle rail 45 (described later), and a leaf spring 42 attached to the other end This elastically contacts the outer circumferential surface of the upper cam 43 that is integral with the cam gear 26 .

Therefore, during table loading when the arm gear 34 rotates a predetermined angle counterclockwise around the pivot @38,
The shaft gear 37 meshing with the sector gear 34a rotates clockwise in the opposite direction, and the pole arm 36 rotates clockwise, as shown in FIG. 1 from the state shown in FIG. 16 (A>). A fixed on the base plate while crossing the guide rail 45
/C crosses in front of the head AH and moves to the normal position as shown in FIG. 16(B). In the stop mode, as shown in FIG. 16(A), the O-lock arm 41 is in a position where its leaf spring 42 abuts against the small diameter portion 43a of the cam 43 to allow movement of the middle pole 39, and this pole During recording/reproduction when the arm 36 rotates, the lock arm 41
After the leaf spring 42 slides along the shape of the cam 43 and the pole arm 36 is rotated to a predetermined stop position,
The leaf spring 42 reaches the large diameter portion 43b of the cam 43, and the glE
As shown in FIG. 16(B), the lock arm 41 moves to lock the base of the middle pole 39, thereby placing it in a locked state.

Next, the tape loading mechanism 15 will be specifically explained.

As shown in FIGS. 1, 3, and 8 (A>(B)), the tape loading mechanism 15 winds the magnetic tape along the outer periphery of the guide drum 11 at an angle of approximately 270 degrees. In order to do this, a supply side guide groove 44a is formed on the left side, and a winding side guide groove 44b having a longer path than this supply side guide groove 448 is formed on the right side. The guide rail 45 and the above-described shape (
a supply gear 33 at the top of the ring) and a take-up gear 28 at the bottom
It is roughly structured as follows.

Each guide groove 44a, 44b of the guide rail 45 is shown in FIG.
As shown in FIG. 4, the parallel parts 44a+, 44t)+ on the insertion side front of the tape cassette 1, and the parallel parts 44a+,
Arc-shaped portion 44a2 connected to 44t)+.44t)2
It consists of

The supply side guide groove 448 is located on the chassis base 14,
On the other hand, in the winding side guide groove 44b, the terminal end of the arcuate portion 44b2 corresponds to the inclination angle and mounting height of the guide drum 11, and in order to maintain the magnetic tape horizontally, It has a displaced structure (a three-dimensional inclined surface as shown in FIG. 10, which is sequentially downwardly inclined from the central part to the rear side). In order to support the vertical roller pole 58 on the pole base 57, which will be described later, at the end of the arcuate portion 44b2, a U shaped U shaped corresponding to the diameter of the vertical roller pole 58 as shown in factor 10 is provided. Letter-shaped recess 129
A substantially U-shaped stopper portion 131 having V-shaped recesses 130 formed above and below is provided.

On the other hand, the end of the arcuate portion 44a2 on the supply side is bent inward toward the guide drum 11 from the vicinity of this end.
' And this? It is divided into a substantially Y-shape by a bending groove 4482' bent in the opposite direction a.

And, in order to support the vertical O-rapole 46 on the pole base 48 at the end of one of the divided arcuate portions 44 a 2 ″, similarly to the end of the guide groove 44 b on the winding side, A stopper portion (not shown) is provided with a U-shaped recess and a V-shaped recess formed above and below.Therefore, a rotatable vertical 0-lap pole (vertical pole) 46 and an inclined loading pole (inclined rotation pole) 47 are provided. When the pole base 48, which is erected close to each other, reaches the 0-ding end position from the stop mode position along the guide groove 44a of the guide rail as shown in FIGS. 13 and 17, the leading vertical pole 46 side By being guided by the bending groove 44a2,
This pole base 48 follows the arc of the other bending groove 44a2'! At the same time, the rear inclined pole 47 side is rotated counterclockwise around the straight pole 46, and at the same time, the axis of the vertical pole 46 is supported by the four upper and lower U- and V-shaped parts of the stopper part, and the pole base 57 is rotated. Positioning is done.

Here, the specific configuration of the take-up gear 28 and the supply gear 33, which serve as tape loading means, will be explained with reference to FIGS. 8(A) and 8(B).

As shown in FIGS. 1 and 7, both the take-up gear 28 and the supply gear 33 have a plurality of guide teeth II! that guide them. 49.
49, and the guide plate 50
They are arranged vertically at a predetermined distance.

As shown in FIG. 8(A), the winding gear 28 has a long hole 53a into which a vertically installed bottle 51, 52 is inserted.

Use 53b as a guide! ! ! 1) A guide plate 53 that rotates is placed on its upper surface, and relative movement of the guide plate 53 is restricted by a tension spring 61 stretched between the two. And this guide plate 5
An a-joint 55 that is vertically displaceable about a shaft 54 is rotatably supported on one side of the elongated hole 53a of 3. 5
7 has a vertical pole 58 rotatably supported on a shaft and an inclined fixed pole 59 erected in close proximity to each other, and the guide rail 4
5 is a pole base on the winding side that moves on the vertical pole 58 using part 1 of the vertical pole 58 as a guide shaft, and a tongue piece 57a that enters into the stopper part 131 is formed at the tip on the moving side. This pole base 57 has 5 tilted fixed poles on the J!
By being mutually pivotally supported with the connecting rod 55 via the moving rod 60, it can rotate horizontally on the winding gear 28, and can also be vertically displaced together with the moving rod 60 by the action of the connecting rod 55. Become.

Therefore, during loading when the winding gear 28 is driven by the gear depression 16 and rotates in the counterclockwise H1 direction, when the pole base 57 passes through the center of the guide rail 45 and reaches the three-dimensional inclined surface, Although the vertical distance between the pole base 57 and the guide rail 45 is large, the connecting rod 55
The pole base 57 moves up and down as shown in Figs. 13 and 17.
As shown in the figure, the loading end position of the three-dimensional inclined surface is surely reached.

Moreover, three bottles 62a are provided on the winding gear 28.

The bins 62b and 62c are arranged one after another with a predetermined spacing between them, and the bins 62b and 62a are located on the rear side of the guide plate 53 to form a pinch roller cam 73 which will be described later.
The other bins 62c are driven sequentially by the bins 62b and 6b so as to lock the eject lever 65 shown in FIG.
It is arranged at a position preceding 2a on the rotational direction side.

On the other hand, the supply gear 33 has the same structure as the take-up gear 28, as shown in FIG. 8(B), and has a long hole 34a.
, 34b as guides, a guide plate 64 with hanging bottles 65, 66 is mounted on its upper surface, and relative movement is regulated by a tension spring 67 stretched between the two plates. .

A connecting rod 70 is mounted on the guide plate 64 and is rotatable about a shaft 69 with a bottle 68 erected thereon. This bin 68 has a vertical pole 46 rotatably supported on a shaft and a tilted fixed pole 47 erected in close proximity to each other, and a pole base 48 having a tongue piece 48a formed at the distal end on the movable side is locked. ing.

Here, the operations of the pinch roller cam 73 and the pinch roller 71 that are operated in conjunction with the rotational operation of the take-up gear 28 shown in FIG. 8 (A) are shown in FIGS. 12, 13, and 18 (A). This will be explained with reference to (C).

A disc-shaped pinch roller cam 73 that drives the pinch roller 71 to a predetermined position is rotatably supported by a shaft 72.
At its outer periphery are bins 62b and 62 on the winding gear 28.
a, the first. Second locking grooves 73a, 73b are formed, and both locking grooves 73a, 73
A spring pin 75 is provided on the outer periphery of the side facing b and the shaft 72.
has been erected. In other words, both the locking grooves 73a, 73b and the bin 75 have a substantially triangular relationship.

When the take-up gear 28, which is rotated counterclockwise by the terminal gear structure 25 via the gear mechanism 16, rotates by a predetermined angle, the take-up gear 28 is erected as shown in FIG. 18(A). The preceding pin 62b locks the first locking groove 738 of the disc-shaped pinch roller cam 73 supported by the shaft 72.

Therefore, the pinch roller cam 73 rotates clockwise about the shaft 72 against the force of the reversing spring (first elastic means) 74 stretched between the spring pin 75 and the fixed pin 76. . This rotation of the pinch roller cam 73 causes the pinch roller arm 78 provided with the pinch roller 71 to rotate counterclockwise around the shaft 77 via the link 81 that connects the connecting bin 79 and the spring bin 75. and move to the cab stan 80 side. This pinch roller arm 78,
The link 81 and the pinch roller cam 73 constitute a toggle mechanism (boosting mechanism).

As the winding gear 28 continues to rotate counterclockwise, the bin 62b is disengaged from the first locking groove 73a, and the next bin 62a located on the tangential side is moved to the position shown in FIGS. 12 and 18 (B).
), the second locking groove 7 of the pinch roller cam 73
3b and locks this, the pinch roller cam 73 is rotated while further bending the reversing spring 74, so the link 81 is further pulled in the direction of the arrow, and the pinch roller arm 78 is rotated counterclockwise about the shaft 77. direction and bring it close to the capstan 80.

At this time, the toggle mechanism changes the distance 1fij+ between the center of the shaft 72 of the pinch roller cam 73 and the axis of the link 81, the distance j2 between the spring pin 75, the force F+ acting on the link 81 in the D direction, and the distance of the spring pin 75. The relationship with the force F2 acting in the rotational direction is Fl.11-F2.12.

Therefore, in the vicinity of the peak position of the toggle mechanism where the axis of the link 81 is close to the center of the shaft 72 due to the clockwise rotational force of the pinch roller cam 73, the relationship becomes 12>>I+, so according to the above formula, FIG>F2 Thus, the small rotational force of the pinch roller cam 73 can provide the large force necessary to operate the pinch roller 71, and the load on the loading motor 19 can be reduced.

After that, the rotation of the winding gear 28 causes the bin 62a to move to the first position.
8(C), the axis of the link 81 connecting the spring pin 75 and the connecting pin 79 crosses the line (peak line) connecting the centers of the shaft 72 and moves from the center position of the shaft 72 during the above operation. By slightly displacing to the opposite side and moving to the loading end position, the link 81 moves in the direction D using the spring bin 75 as a guide against the spring 82 stretched between the spring bin 75 and the spring bin 75. The pinch roller 71 is elastically pressed against the capstan 80 by a force of 82 (tape running state! 1 m).

At this time, due to the force F1 acting on the link 81 in the C direction, the spring pin 75 is forced to move F in the direction of rotation of the pinch roller cam 73.
Since a force of 2 is generated, this force acts in the rotational direction of the take-up gear 28 and supports the pressing force of the pole base 57 when it reaches the O-ding end position. In this way, the pinch roller arm 78, the link 81, and the pinch roller cam 7
Pinch 0 - Rough 1 pulled in direction D by the toggle mechanism according to 3 is reliably elastically pressed against the capstan 80 with a predetermined force due to the small rotational force of the pinch roller cam 73. By reducing the load on the driving winding gear 28 and reducing the load on the loading motor 19, the loading motor 19
This makes it possible to reduce the size of the motor and drive parts, thereby reducing weight.

Further, when the pinch roller 71 is pressed against the capstan 80, the biasing force of the reversing spring 74 is converted and the biasing force acts in the rotational direction of the pinch roller cam 73, so that the pinch roller cam 73 is pressed against the capstan 80. second elastic means) 82
Since the rotational force in the clockwise direction is applied by the reversing spring 74 and the rotational force in the clockwise direction, when the loading motor 19 is stopped and loading is completed, the rotational force due to the above-mentioned urging force of the pinch roller cam 73 is applied to the winding through the bin 62a. By further applying rotational force to the gear 28 in the normal rotation direction, the pole base 57 can be positioned more reliably.

Further, due to the elastic action of the reversing spring 74, the looseness that sometimes occurs when the pinch row 571 is attached can be absorbed.

In this way, by reducing the operating force of the pinch roller 71, this and ll131! Since the designed strength of each component can be reduced, the weight of the device 10 can be reduced and reliability can also be improved.

Here, the reel drive mechanism 17 will be described in detail with reference to FIGS. 1, 2, 4, and 5, respectively.

As shown in FIG. 2, the capstan motor 83 which has a flywheel 93 on its shaft and drives the capstan 8o has a pulley 84 integrated with the flywheel 93 and a belt 86.
A flange 8 fixed on the chassis base 14 via
1 supported on shaft 90 via 8! Moving gear body 85
The pulley 87 is decelerated and driven. The rotational force from the pulley 87 is applied to the input gear 89 of the oscillating gear structure 85 by r! i A pair of left and right planetary gears (idlers) 91 and 92 attached to the flange 88 so as to mesh with this input gear 89 are synchronously decelerated (reverse driven) by being transmitted through a friction plate (such as felt). )do.

The planetary gear 92 on the right side of the oscillating gear structure 85 is disposed close to the right side thereof as shown in FIGS. 2 and 5, and can selectively mesh with a large diameter gear 95 rotating around a shaft 94. in a state. And those large diameter teeth! I95 is friction plate 96
an upper large-diameter gear 97 of approximately the same diameter that rotates coaxially through the
Further, this large-diameter gear 97 meshes with nine small gears that rotate around a shaft 98 and are integrally provided with small teeth I1100 on the upper part. Therefore, when the tape cassette 1 is attached to the cassette 10 as shown in FIG. The upper pinion 1 is maintained horizontally by
00 meshes with the gear portion 7a on the outer peripheral surface of the take-up reel 7.

In FIGS. 1 and 4, 104 is a brake arm supported by @105, and when a rotational force in one direction is applied by a torsion spring (not shown) inserted into @105, , the brake pad 106 at the tip has the above-mentioned large diameter t.
's drum part 95a+ of the car 95: Although this is braked by frictional contact, the pinch roller 71 and the capstan 80
When the magnetic tape rotates in the forward direction during recording, etc., the brake pad 106 is moved away from the drum section 95a in conjunction with the moving operation of the pinch roller 71, thereby relieving the load on the drum section 95a.

Further, the other planetary gear 91 located on the left side of the oscillating gear structure 85 is mounted on one side built in the supply side reel feather 127 of the supply side reel disk structure 108 supported by a shaft 107 erected from the chassis base 14. It is selectively engaged with a large-diameter gear 110 that serves as an input flange of the clutch mechanism 109. And this large diameter gear 110 is r! i
The TA plate 125 rotates integrally with the sheet metal 25 and the supply side reel feather 127. Internal one-sided clutch mechanism 1 with output connectable via supply side reel feather 127 and roller 111
A tension band 114 is wound around the outer peripheral surface of the rotating body 112 of No. 09, and the tension band 114 has one end fixed to the chassis base 14 and the other end connected to one end of an arm lever 113 connected to a tension arm 119 described later. It's being passed around.

Therefore, during recording/reproducing rotation in which the capstan 80 rotates in the normal direction, the oscillating gear assembly 85 rotates in the F direction (shown in FIGS. 1 and 14), and the other planetary gear 92 is connected to the right large-diameter gear 95. By engaging with and rotating it clockwise,
Since the supply side reel feather 127 directly connected to the supply reel hub 6 of the tape cassette 1 rotates clockwise as the magnetic arp is fed out, the roller 111 enters into the wedge-shaped four parts 112a in the rotating body 112 and the rotating body 11
2 together clockwise. This rotating body 112
When the magnetic tape is rotated, the tension of the tension band 114 is applied, an appropriate pack tension is applied to the magnetic tape, and the magnetic tape is wound onto the winding wheel 7.

Furthermore, during reverse running of the magnetic tape, in which the oscillating gear assembly 85 rotates counterclockwise (in the E direction), one of the planetary gears 91 is connected to the supply side reel feather 127 and 1! ! m board 12
By meshing with the large-diameter gear 110 that rotates integrally through the rotating body 112, the gear 111 in the rotating body 112 moves in the escape direction of the wedge-shaped recess 112a, and the supply side reel feather 127 absorbs the load of the tension band 114. The tape can be rotated in the tape rewinding direction without being hit.

Therefore, for example, when the magnetic tape 2 is transferred from forward running when fed out from the supply reel hub 6 to reverse running such as rewinding, one planetary gear 92 of the oscillating gear assembly 85 and the large diameter gear 95 At the same timing when the meshing state with the reel feather 127 is released, the other planetary gear 91 meshes with the large diameter gear 110 of the supply reel feather 127 and immediately reverses the supply reel feather 127. In addition to achieving high responsiveness, the load acting on the capstan motor 83 is reduced and eliminated.
Power can be reduced. Also, during reverse running such as rewinding, the one-sided clutch mechanism 109 in the supply side reel feather 127
Since this can be done without loosening the tension band 114, in addition to the above, the mechanism can be simplified and the desired operation can be performed in a small space, thus contributing to the miniaturization of the device 10 and the structure of the rod.

Here, again, FIGS. 1, 14, and 19(A) to
(C) The tension arm 119 and arm lever 1 are operated in conjunction with the pole base 48 on the supply side.
13 and Kanayama erase head 116 will be explained.

A tension arm 119 rotatably supported on a shaft 120 erected on the chassis 14 has one end facing the pole base 48 so as to be latched thereto, and a tension arm 119 that is attached to the base 11.
An arm lever 113 that locks the tension band 114 is rotatably supported on the arm 9a. Although this tension arm 119 is biased with a counterclockwise rotational force by a biasing means such as a torsion spring (not shown), the pole base on the supply side returns to the rest position in the stopped state shown in FIG. 48 and stops against the force of the torsion spring. When the pole base 48 is in a stopped state, the tension band 114 is in a relaxed state with respect to the rotating body 112.

The impedance roller 115 is fixedly disposed between the full-width erasing head 116 and the tension arm 119, and absorbs vibrations of the running magnetic tape.

The shaft 12 supporting this impedance roller 115
2, a head base 123 on which a full-width erasing head 116 is mounted is rotatably supported, and a clockwise rotational force is applied by a spring (not shown). 123a is the tension arm 11
9 of the bins 124 can be locked.

Therefore, during tape loading, when the pole base 48 on the supply side moves toward the loading end position within the guide groove 44a on the supply side with the vertical roller pole 46 as the leading end, the tension arm 119 in the state shown in FIG. , as shown in FIG. 19(A), the pole base 48 is parallel to the parallel part 44.
Since it gradually separates from the pole base 48 during the movement process from aI to the arcuate portion 44a2, its locked state is released and the rotation returns in the counterclockwise direction about the shaft 120 due to the self-returning force of the torsion spring. Permissible. Then, when the pole base 48 separates from the tension arm 119 due to the subsequent movement of the pole base 48, at the same timing, the rotational force of the tension arm 119 causes the bin 124 to be mounted with the full-width erasing head 116 as shown in FIG. 19(B). One end locking part 12 of head base 123
3a, a rotational force is applied to the head base 123 in the D8 direction. At this time, the tension band 114 continues to be in a relaxed state with respect to the rotating body 112.

When the head base 123 is locked by the pin 124 of the tension arm 119, as the pole base 48 on the supply side continues to move, the pole base 48 further comes into contact with one side of the head base 123,
The head base 123 is rotated counterclockwise about the shaft 122. This rotation of the head base 123 causes the tension arm 119 to rotate slightly clockwise as shown in FIG. 19(B), and the tension band 1
14 continues to be in a relaxed state. And pole base 4
8 reaches the loading end position, the pole base 48
The head base 123, which had been rotationally displaced to the state shown in FIG. 19(B), is released from the contact state and rotates clockwise around the shaft 122 due to the biasing force, as shown in FIG. 19(C). It rotates back and is set at the desired setting position.

At this time, at the same time as the tension arm 119 rotates, the arm lever 113 is pulled in the Y1 direction as shown in FIG. This is a tense situation.

Also, when unloading the tape, the head base 12
3 and the tension arm 119 operate in a manner opposite to that at the time of O-ding, so a description thereof will be omitted. Therefore, at the time of tape loading and tape unloading, the tension arm 119 is operated in conjunction with the movement of the head base 123, so that the head base 123 is moved.
By appropriately changing the shape of the tension arm 119, the operation timing of the tension arm 119 can be set appropriately, and the tension band 114 can be loosened and tightened with a simple configuration, so that tape damage can be avoided and the number of parts is reduced. And the desired purpose can be achieved in a small space.
This also reduces the weight of the device and improves productivity such as assembly.

Here is a magnetic recording and/or reproducing device having the above configuration! 1
The operation of 0 will be summarized and specifically explained. The series of operations of each component is performed by a mode sensor section 128 provided on the cam gear 26 shown in FIG.

In the stop mode shown in FIGS. 1 to 4, the 9th
When a tape cassette 1 as shown in the figure is inserted into a cassette holder (not shown) floating above the top surface of I[i and pressed, the tape cassette 1 is pushed by the action of a pantograph mechanism (not shown) provided at the bottom of the cassette holder. The tape is lowered to a predetermined position on the loading device side, and preparations for tape loading are completed.

FIG. 12 is a plan view of the magnetic recording and/or reproducing apparatus 10 in a Rec lock mode state following tape loading, and FIG. 13 is a plan view showing the loading mechanism taken out after tape loading is completed.

When the device 10 is in the stop mode shown in FIG.
When the power switch is turned on and the eject switch is then pressed, the loading motor 19 reverses, and as the take-up gear 28 reverses, the bin 62c moves toward the eject lever 6.
5 is locked and rotated counterclockwise about its shaft 132 as shown in FIG. This rotation of the eject lever 65 releases the lower part of the pantograph mechanism of the cassette holder (not shown) which is locked thereto, and the cassette holder is raised upward. At this time, the pole base 48 on the supply side and the pole base 57 on the winding side move into the guide groove 48 in the direction opposite to the direction of movement during loading.
The parallel portion 44a+ of 48.44b is slightly retreated toward the bent portion 44b3. This eject mode is set to mode sensor section 1.
28, the eject lever 65 and each bow base 48, 57 return to the positions shown in FIG. Then, in the raised cassette holder, the ninth
By inserting the tape cassette 1 shown in the figure and lowering the cassette holder towards the apparatus, the locking means provided on the cassette holder engages with the fixing bin provided on the apparatus, and the cassette holder is attached to the apparatus. mounted in place.

When the tape cassette 1 is installed in the predetermined position of the '5A position 10 as shown in FIG. 2, the loading motor 19 starts to rotate normally as described above, and the worm gear 20. The terminal gear assembly 23 is decelerated and driven via the worm wheel 21 and the like.

By driving the terminal gear structure 23, this driving force is transmitted to the take-up gear 28 of the tape loading mechanism 15 via the intermediate gear 27 provided therein, and is transmitted counterclockwise in FIG. The guide drum 11 shown in FIG. On the other hand, this winding gear 28 drives the large gear 31, small gear 32, etc. of the gear assembly 30 that meshes with the winding gear 28 via the idle gear 29, thereby applying this driving force to the tape loading gear that meshes with the winding gear 28. The transmission is transmitted to the other supply gear 33 of the mechanism 15, and in synchronization with the winding gear 28, it is moved in the direction shown in FIG. 3, around the guide drum 11 shown in FIG. drive the rotation.

Further, by driving the supply gear 33 disposed above the tape loading mechanism 15, the supply side pole base 48, which has a vertical roller pole 46 and an inclined fixed pole 47 connected thereto, moves on the guide rail 45 in the first position. It is moved clockwise in the figure to a predetermined position.

As the pole base 48 on the supply side moves, the tension arm 119, which is locked to the pole base 48 and is biased with a counterclockwise rotational force by a torsion spring, changes from the state shown in FIG. 19 (A>) to the state shown in FIG. As shown in (B), the pin 124 locks the one end locking portion 123a of the head base 123 at the same time as the pole base 48 is released from the locking state and rotates counterclockwise.

As the supply-side pole base 48 continues to move due to the rotation of the tension arm 119, the head base 123, which is in contact with the supply-side pole base 48, is rotated about the shaft 122 in the counterclockwise direction, which is the escape direction.

As the tension arm 119 rotates slightly clockwise due to this rotation of the head base 123, the tension band 114 moves in the Y2 direction, and the rotating body 112, which rotates integrally with the supply side reel feather 127, maintains a relaxed state. be done.

When the pole base 48 on the supply side is rotated counterclockwise by the bending groove 44a' and reaches the loading end position, as shown in FIG. 19(C), the head base 123
The head base 123, which had been rotationally displaced until then, is rotated back clockwise about the shaft 122 and set at the desired setting position. At this time, the tension band 114 is pulled in the Y1 direction and exerts an additional force on the supply side reel feather 127, so that the magnetic tape does not become loose and development does not occur.

In addition, in this low loading process, the winding side pole base 57 having the vertical roller pole 58 and the inclined fixed pole 59 connected thereto is moved onto the guide rail 45 by the drive of the winding gear 28 on the lower side of the tape loading IaM4. When the winding gear 28 is moved by a predetermined angle in the counterclockwise direction in FIG. The first locking groove 73a is locked.

Therefore, the pinch roller cam 73 is operated by a reversing spring 74 stretched between a spring bin 75 and a fixed bin 76 that are set upright on the pinch roller cam 73.
It rotates clockwise about shaft 72 against the force of.

This rotation of the pinch roller cam 73 causes the pinch roller arm 78 provided with the pinch roller 71 to rotate in the counter-chronological direction about the shaft 77 via the link 81 connecting the connecting bin 79 and the spring bin 75. The pinch roller 71 is brought close to the capstan 80 side.

As the take-up gear 28 continues to rotate clockwise, the next bin 62a reaches the second locking groove 73b of the pinch roller cam 73 as shown in FIG. Since the pinch roller cam 73 is rotated while being bent, the link 81 is pulled in the direction of the arrow in FIG.
Rotate the capstan 8 counterclockwise around 7.
0, the next bin 62a moves as the take-up gear 28 rotates, and the axis of the link 81 crosses the line connecting the shaft 72, the spring bin 75, and the connecting bin 79 in a straight line, as shown in FIG. When the link 81 is displaced as shown in FIG. 1 and reaches the loading end position, the link 81 moves in the direction D using the bin 75 as a guide against the force of the spring 82 stretched between it and the bin 75, thereby lifting the pinch row 571. It is elastically crimped onto the capstan 80.

When this pinch roller 71 is pressed onto the capstan 80,
As described above, the above-mentioned toggle mechanism including the pinch roller cam 73 allows the pressure force of the pinch roller 71 to be transferred to the take-up gear 28.
Further, a force in the rotational direction is applied to securely position the pole base 57. Simultaneously with this positioning of the pawl base 57, the biasing force of the reversing spring 74 is converted, and this force biases the take-up gear 28 to rotate clockwise, thereby crimping the pawl base 57 against the stopper portion 131. support. In other words, the reversing spring 74 functions as a second toggle spring. (Rec Paus in Figure 13
e state...the state in which the capstan 80 is stopped) When the pole base 57 on the winding side is positioned on a three-dimensional plane as shown in FIG.
The stopper portion 13 whose upper surface is provided at the end of the guide groove 44b
1 and the rear end on the side of the inclined pole 59 is supported by the guide rail 45, resulting in a pinched state.
The vertical roller pole 58 is vertically supported by the upper U-shaped four parts 129 and the lower V-shaped recess 130 formed in the stopper part 131. Therefore, the pole base 57 is on the X axis at the loading end position.

Since the rotational displacement in the Y@ and Z axis directions is restricted, the positioning accuracy is significantly improved. Although the pole base 48 on the supply side is not shown, the pole base 5 on the winding side
7, the tongue piece 48a and the vertical pole 4
6 is positioned with high precision by the stopper portion, the U above and below the stopper, and the four ■-shaped portions.

On the other hand, in the movement process of each of the pole bases 48, 57, the driving of the terminal gear assembly 23 in conjunction with the driving of the loading motor 19 rotationally drives the cam gear 26 integrated with the cam gear mechanism 25 connected thereto. . As a result, the arm gear 34, in which the pin 35 is locked in the spiral cam groove 26a of the cam gear 26, is moved into the cam groove 26a.
Corresponding to the shape of 6a, the state shown in Fig. 16 (A) is changed from the state shown in Fig. 16 (A).
It is rotated counterclockwise to state B). Arm gear 34
As a result of the rotation, the fan-shaped gear 34a formed at the other end rotates the shaft gear 37 of the pole arm 36 on which the middle pole 39 is erected. This pole arm 36 has a pole base 57
It is rotated in the chronological direction about the pivot shaft 38, across the guide rail 45 and the fixed A/C head AH, so as to follow the movement of the A/C head AH. Then, the pole base 57 reaches the three-dimensional inclined surface of the guide rail 45 and the magnetic tape 2
At the same time as the lock arm 41 starts to be twisted,
The leaf spring 42 moves in accordance with the shape of the cam 43 and locks and fixes the base of the middle pole 39, thereby completing loading of the magnetic tape 2 onto the guide drum 11.

In this way, by making the middle pole 39 rotatable so as to follow the movement of the pole base 57, the mechanism is simpler than the conventional standing type, and the tilt of the middle pole 39 can be managed easily. It is easy to use as a single item, it is easy to assemble, and the magnetic arc 2 is not damaged during tape loading.

As shown in FIG.
．． Supply side vertical pole 46 via full width erase head 116
．． After the guide drum 11 is spliced and wound over an angular range of approximately 270 degrees from the inclined pole 47, the vertical pole 58. The middle pole 39 with the inclined pole 59 attached and further rotated. After being attached to the fixed A/C head AH, it is sandwiched between a capstan 80 and a pinch roller 71 and reaches the take-up reel hub 7.

When a recording switch (not shown) is turned on, the capstan motor 83 rotates normally (rotates clockwise) and rotates a pulley 87 connected by a belt 86.

The clockwise rotational force from the pulley 87 is shown in FIG.

The input gear 89 of the oscillating gear structure 85 as shown in FIG. Pair of left and right planets 11mff191
．． 92, which is rotated counterclockwise and transmitted to the lower large-diameter gear 95 on the take-up side.
Furthermore a! Upper large diameter gear 97 on the winding side via the friction plate 96
This rotational force is also transmitted to the small gear 99.

Therefore, in this state in which the tape cassette 1 is installed, the rotational force transmitted to the small gear 1oO is transmitted to the gear portion 7a on the outer circumferential surface of the take-up reel hub 7 in the cassette, causing it to rotate. (Rec state in FIG. 13) When the recording switch is turned on again, the capstan motor 83 is switched from the forward rotating state in the clockwise direction to the reverse rotating state in the counterclockwise S1 direction.

Along with this switching, the TI star gear 91 meshes with the large diameter gear 110 on the supply side, which serves as the input flange of the one-way clutch 11109, transmitting the rotational force from the capstan motor 83, and transmitting this rotational force. rc! , to the supply reel feather 127 via the swing plate 125 and the coil spring 126, rotates the supply reel 6 in the tape cassette 1, and reverses the tape wound on the take-up reel by several frames to the supply reel hub 6. Wind it up. (Backspace) At this time, due to the existence of the pair of planetary gears 91 and 92 meshing with the input gear 89 of the oscillating gear structure 85, the input gear 89
Since the rotational displacement angle of the magnetic tape can be minimized, the occurrence of slack in the magnetic tape can be minimized, tape damage can be reduced, and control pulses can be accurately read by the A/C head A++.

At this time, the rollers 111 of the one-way clutch mechanism 109 in the supply side reel feather 127 are on the biting side, so that winding is possible with the load applied by the tension band 114.

Thereafter, the capstan motor 83 is again advanced in the forward rotation direction by several frames less than the back space, and then the capstan motor 83 is stopped. Then, when the recording switch is turned on again, the capstan 80 is driven to rotate in the normal direction due to the normal rotation of the capstan motor 83.

This Rec or Rec Pause! 2! (13th
When the power switch is turned off in the state shown in the figure), the loading motor 19 rotates in the reverse direction as described above, and the loading ring rotates in conjunction with this.
Separate the pinch roller from the capstan. The mode sensor unit 128 detects this state, and the device again enters the ReC lock state as shown in FIG.

Thereafter, except for continuous recording, the power switch is turned off after a certain period of time has elapsed.

When the power switch is turned on again, the loading motor 19 rotates in the normal direction, and as shown in FIG.
When the recording switch is turned on after entering the e state, the recording mode is entered and predetermined recording is performed.

When a predetermined recording is completed and an eject switch (not shown) is turned on, the loading motor 19 is reversely rotated to enter an unloading state.

In the unloading state, the bin 6 of the winding gear 28 on the winding side
2c pushes the eject lever 65 to release the engagement with the locking means of the cassette housing and raise the cassette housing. This allows the tape cassette 1 to be taken out from the apparatus.

When the mode sensor unit 128 detects this eject mode, the loading motor 1.9 rotates normally, and each element
The stop mode state shown in FIG. 3, etc. is entered.

Although only recording has been described in the embodiment of the present invention, it goes without saying that reproduction can also be performed in the same way.

(Effects of the Invention) As described above, according to the magnetic recording and/or reproducing apparatus of the present invention, for example, when loading a tape, the pole base sequentially operates the tension arm and the head base equipped with the full-width erasing head. The tension band acting on the supply side reel feather is relaxed, and when the pole base reaches the loading end position, the locking state with the bed base is released.
As in the past, many parts are used to perform tension arm relaxation operations, and various operations can be performed smoothly with a small number of parts and a simple mechanism, and the desired operation can be performed in a small space by simplifying the Akebonobashi bridge. In addition, by appropriately changing the shape of the head base, the operation timing of the tension arm can be set to an exaggerated value. Furthermore, productivity is improved by simplifying the enclosure, and power consumption can be reduced by reducing the load on the drive motor, which also contributes to making the device smaller and lighter. It has the following features.

[Brief explanation of drawings]

1 to 5 show a stop mode state before loading a tape cassette of a preferred embodiment of the magnetic recording and/or reproducing apparatus according to the present invention, and FIG. 1 shows the magnetic recording and/or reproducing apparatus according to the present invention.
2 is a right side view of FIG. 1; FIG. 3 is a plan view showing the pole base drive system including the loading ring; and FIG. 5 is a plan view showing the tape reel drive system including the stun, FIG. 5 is a longitudinal sectional view of FIG. 4, and FIG. 6 (A
), (B) are a schematic sectional view and external perspective view of the guide drum, FIG. 7 is a side sectional view of the gear mechanism shown in FIG. 1, and FIG. 8 (
A> and (B) are assembled plan views of the loading ring on the supply side and the loading ring on the take-up side, and FIG. 9 is a perspective view of the small-sized Arp cassette used when attached to the magnetic recording and/or reproducing apparatus of the present invention. Figure 10 is a side view of the tape guide, Figure 11 is a plan view showing the state of the eject lever and pole base in the eject mode, and Figure 12 is a side view of the tape guide.
The figure is an explanatory diagram of operation in loading mode, No. 13
The figure is an explanatory diagram of the operation in ReC mode, Fig. 14 is a diagram showing the state of the pole base and head base when rope inking is completed, Fig. 15 is an explanatory diagram of the operation of the head base during loading, and Fig. 16 (A) , CB)
17 is an explanatory diagram of the movement of the pole arm that cooperates with the arm gear, FIG. 17 is an explanatory diagram showing the movement process of the pole base, and FIG.
Figures (A) to (C) are operation explanatory diagrams showing the operation of the pinch roller that cooperates with the pinch roller cam, and Figures 19 (A) to (C).
) is an operation explanatory diagram showing the relationship between the tension arm and the head base that cooperates with the pole base, and FIG. 20 is a timing chart. 1... Tape cassette, 11... Guide drum, 2
8... Winding side loading gear, 33... Supply side loading gear, 46.58... Vertical pole, 47.59... Inclined pole, 48.57... Pole base, 83... Capstan motor, 114... Tension band, 115... Full width erase head, 119... Tension arm, 123... Head base, 127... Supply side reel feather. 7 B IZI (A)? 8th torture t″B)

Claims (1)

[Claims] A magnetic tape is pulled out from a tape cassette installed in the apparatus, and a pole base equipped with a vertical pole and an inclined pole is installed to guide the magnetic tape on the entrance side and the exit side to a tape guide drum equipped with a rotating magnetic head. a supply side loading means and a winding side loading means, the magnetic tape is wound around the tape guide drum over a predetermined angular range;
Alternatively, in a playback device, a head base equipped with a full-width erasing head and energized with rotational force, a supply reel feather that rotatably supports a supply reel hub of the tape cassette, and a control that controls the rotation of the supply reel feather. a member, and a tension arm having one end facing a position where the pole base and the head base can be locked, the other end being connected to the control member, and a rotational force being applied to the other end. When the pole base moves from the stop position to the tape loading end position, the pole base operates the tension arm and the head base to release the load on the supply reel feather caused by the control member. 1. A magnetic recording and/or reproducing device characterized by comprising: