JPH0725880Y2 - Magnetic recording and / or reproducing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a magnetic recording and / or reproducing apparatus for recording or reproducing by winding a magnetic tape on a guide drum, and more particularly to a vertical loading pole and a tilted loading pole. The present invention relates to a magnetic recording and / or reproducing apparatus in which the position regulation of a pole base mounted with is ensured.

(Prior Art) Currently, development is being made to further miniaturize the current home video tape recorder (VTR) without changing the recording pattern on the magnetic tape. One of the ways to make VTRs smaller is to use magnetic tape as a guide drum.
The diameter of the guide drum is reduced to 2/3 of the current one by wrapping it around 270 degrees in excess of the current 180 degrees, and providing four video heads at 90 degree intervals, reducing the diameter of the guide drum. There is an idea to try to achieve the miniaturization of VTR.

Here, in order to be compatible with the current model, in addition to matching the video signal recording pattern on the magnetic tape, the tape guide drum (guide It must match the standard length along the tape path from the drum) to the audio control head (A / C head).

Therefore, the applicant company set the guide drum to have a small diameter as described above, and wind the magnetic tape symmetrically around the guide drum to match the tape length to the A / C head with the reference length. Another magnetic recording and / or reproducing apparatus has been proposed as Japanese Patent Application No. 58-127083. This is arranged in the vicinity of a tape cassette in which a guide drum is mounted to reduce the size of the device.

On the other hand, the pole base mechanism as a means for pulling out the tape from the attached tape cassette is as shown in FIG.
The pole base 134 is equipped with a pair of loading poles such as a vertical loading pole 132 and an inclined loading pole 133. Then, the pole base 134 is X at the tape loading end position.
It is necessary to reliably restrict rotation about the axes, the Y axis, and the Z axis.

22 (A) and (B) are side views showing a conventional position regulating method for the pole bases on the supply side and the winding side at the loading end position.

As shown in FIG. 9A, the pole base 134 on the supply side is guided by the guide rail to reach the loading end position.
₁ has a stopper 135 ₁ whose upper surface is supported by a stopper 135 ₁ formed at a terminal end of a guide rail 138, and a base of a vertical loading pole 132 ₁ which is formed so as to sandwich a pole base 134 ₁ vertically. ₁ of the upper V-groove (recess) 136 ₁
And it is supported respectively on the lower side of the U-groove 137 _1. on the other hand,
Pole base 134 _{and second} winding side as shown in FIG. (B), the upper surface of its distal end as with the supply-side guide rail 138
It is supported in the stopper 135 ₂ provided in the end portion, and a vertical loading pole 132 ₂ stopper 135 ₂ its upper end
While being supported by the V-groove 136 in ₂ formed, in which the lower end is respectively supported within U-channel 137 ₂ formed in the end portion of the guide rail 138 at the lower side of the pole base 134 ₂ . Thus each pole base 134 _1, 134 ₂ will be restricted in position at the end of the guide rail 138.

(Invented problem to be solved) However, in positioning of the pole base 134 _1, 134 ₂ at the end tape loading pole base 134 ₁ of one of the supply side, is the vertical loading pole 132 ₁ is its base since it is intended to be supported by V grooves 136 _1, U grooves 137 ₁ close to each other at, not only it is difficult to issue a regulation accuracy of Y-axis rotation of the pawl base 134 _1, the vertical loading pole 132 ₁ It is difficult to regulate the fall of Moreover, the pole base 134 ₂ for the other of the winding side is rotated in the X-axis around the center of the upper V-groove 136 ₂ by applying a force to the upper surface of the distal end portion is crimped in crimping the stopper 135 ₂ , Tip and V groove 136 ₂
Therefore, it is difficult to obtain accuracy around the X-axis due to variation in pressure bonding at the tip end. Furthermore, since sufficient force to the V-groove 136 ₂ which is located away against compression forces acting on the pole base 134 ₂ from the driving source does not act,
There is a possibility that the vertical loading pole 132 ₂ cannot be completely inserted into the V-groove 136 ₂ and the regulation accuracy around the Y axis of the pole base 134 ₂ is not obtained and stable tape running cannot be obtained. There is a nature.

(Means for Solving Problems) Therefore, the present invention provides a magnetic recording and / or
Or, the purpose is to provide a playback device,
A feeding side loading means having a pole base mounted with a vertical roller pole and an inclined pole for pulling out a magnetic tape from a tape cassette mounted on the apparatus and guiding the magnetic tape at an inlet side and an outlet side with respect to a tape guide drum, and winding. A magnetic recording and / or reproducing apparatus comprising a magnetic tape and a tape guide drum, the magnetic tape being wound around the tape guide drum over a predetermined angle range. The upper portions of the vertical roller poles provided on the side loading means are supported by the U-shaped concave portions formed on the stopper portions provided near the loading end position on the upper portions of the roller poles, and the lower portions are respectively formed by the V-shaped concave portions. Provided is a magnetic recording and / or reproducing apparatus characterized by being configured to support Is shall.

(Operation) In the stop mode state as shown in FIGS. 1 to 4, the magnetic tape 2 is pulled out from the tape cassette 1 shown in FIG. 9 and wound around the tape guide drum 11 at a predetermined angle.
At the end of the tape loading as shown in FIG. 13, the pole bases 48 and 57 having the inclined poles 47 and 59 and the vertical roller poles 46 and 58 mounted at the respective end portions of the guide rails 45 are shown in FIGS. ), The upper portions of the vertical roller poles 46, 58 are restricted by the U-shaped concave portions 129a, 129b of the stopper portions 131a, 131b, respectively, and the lower portions thereof are respectively formed by the V-shaped concave portions 130a, 130b. By regulating the position, the vertical roller pole is surely positioned, and therefore the tape path is set with high accuracy, so that stable tape running can be performed.

(Embodiment) First, before describing the magnetic recording and / or reproducing apparatus according to the present invention, the structure of a tape cassette applied to the apparatus according to the present invention will be described.

FIG. 9 shows a small tape cassette 1 used by being mounted in the magnetic recording and / or reproducing apparatus of the present invention. The small tape cassette 1 is provided with a cassette housing 3 accommodating a magnetic tape 2 and an openable and closable front side, and is guided by left and right guide rollers 5, 5 to cross the front surface of the cassette housing 3. It comprises a lid 4 for protecting the magnetic tape 2 present.

In this tape cassette 1, a supply reel hub 6 is fitted to a supply reel feather of a device 10 described later, and a take-up reel hub 7 is provided.
The gear part 7a on the outer peripheral surface of the device is the drive gear of the device (10 in FIG. 2).
(Shown by 0), the vertical and inclined loading poles and capstans, which will be described later, are relatively fitted in the concave portions 3a, 3b, 3c on the front side of the cassette housing 3, and the lid 4 is horizontal. It is attached to the magnetic recording and / or reproducing apparatus 10 in a state in which it is rotated to the position and the lid is opened.

1 to 5 show a preferred embodiment of a magnetic recording and / or reproducing apparatus 10 according to the present invention, each showing a stop mode state before mounting a tape cassette, and FIG. 1 shows magnetic recording. And / or a schematic plan view excluding a tape guide means such as a loading ring of the reproducing apparatus 10, FIG.
Right side view of the figure, FIG. 3 is a plan view showing a pole base drive system including a loading ring, FIG. 4 is a plan view showing a tape reel drive system including a capstan, and FIG. 5 is a reel shown in FIG. It is a longitudinal cross-sectional view of a drive mechanism.

In each drawing, a magnetic recording and / or reproducing apparatus 10 drives a tape loading mechanism 15 for pulling out a magnetic tape and winding the magnetic tape around a guide drum 11 at a predetermined angle, and also drives the tape loading mechanism 15. The gear mechanism 16 including a plurality of gear groups that corrects the surface of the tape and drives the middle pole that serves as the tape guide, and the reel drive mechanism 17 that drives the tape reel of the tape cassette 1 and the like. It is constructed, and these are all provided on the chassis base 14.

In each of FIG. 1 and FIG. 2, 11 is a tape guide drum (guide drum) in which, for example, four video heads (rotary heads) are arranged at 90 degree intervals,
It is composed of an upper drum 12 that is equipped with this video head and is driven to rotate, and a lower drum 13 that is fixed to a chassis 14. The diameter of the drum is 2/3 that of the conventional one, and the magnetic tape is 270 degrees or more. Wrapped around. The video head sequentially operates by switching the tape contact angle range as one 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 will be described later, the guide drum 11 has an X-axis with respect to the vertical axis.
The inclination angle is small because it is inclined by a predetermined angle (about 10 degrees) in the X-axis direction. Therefore, there is almost no increase in the occupied area and height due to the inclination, and the guide drum in the device 10
The area occupied by 11 is small and the device 10 is small.

Further, as shown in FIG. 6 for details of the mounting state of the guide drum 11, the lower drum 13 is conventionally fixed to the chassis via a separate drum base. A guide drum 11 is provided below the lower drum 13.
It is possible to integrally form a plurality of leg portions 13a ₁ ... 13a ₄ having different lengths corresponding to the inclination angle and the inclination direction. Therefore, the guide drum 11 can be mounted with a predetermined inclination angle by directly fixing the legs 13a ₁ ... 13a ₄ to the chassis base 14 with the screws 18 or the like, so that a high mounting accuracy can be secured. , This guide drum 11
The mounting space can be reduced to secure the space for other mechanical mechanisms on the chassis base 14, and contributes to weight reduction of the device and cost reduction due to the reduction of the number of parts.

The tape loading mechanism 15 and the gear mechanism 16 that perform so-called parallel loading are both driven by a single loading motor 19 that can rotate in both forward and reverse directions. The loading motor 19 that directly drives the gear mechanism 16
As shown in FIGS. 1, 2, and 7, a worm gear 20 of a motor shaft, a worm wheel 21 meshing with the worm gear 20, and a small gear 22 coaxial with the worm wheel 21.
Engages with the large gear 24 of the terminal gear assembly 23 to reduce the speed of the terminal gear assembly 23. And
The shaft gear 23a of the terminal gear structure 23 is configured to rotationally drive a cam gear 26 that is integral with a cam gear mechanism 25 that drives a middle pole 39 described later.

Further, the intermediate gear 27 of the terminal gear assembly 23 meshes with a lower annular winding-side loading gear (winding gear) 28 arranged in the upper and lower two stages of the tape loading mechanism 15 so as to engage with the same. It is rotated 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 structure 30 meshing with the winding gear 28 via the idle gear 29, whereby the small gear 32 integrated with the large gear 31 is driven. The supply-side loading gear (supply gear) 33 on the upper side of the tape loading mechanism 15 meshing with the small gear 32 is decelerated in the clockwise direction. Therefore, the loading motor
When the 19 is driven in the normal direction, its rotational driving force decelerates and drives the winding gear 28 at a predetermined speed via the worm wheel 21 and the terminal gear structure 23, and at the same time, the winding gear 28 is driven.
By driving the gear assembly 30 again through the idle gear 29 by driving 28, the supply gear 33 is synchronized with the take-up gear 28 at a slower speed than this and rotates clockwise around the guide drum 11 shown in FIG. The winding gear 28 is rotationally driven in the counterclockwise direction. The difference in rotation speed between the two winding / supply gears 28 and 33 is
This is due to the length of each movement path of the pole base described later.

Reference numeral 34 denotes an arm gear.As shown in FIG. 16, the arm 35 has a pin 35 planted at one end locked in a spiral cam groove 26a formed in the cam gear 26 and at the other end. The formed fan-shaped gear 34a meshes with the shaft gear 37 of the pole arm 36 having the middle pole 39 erected at one end, and rotates counterclockwise about the pivot shaft 38. Also, this arm gear
A lock arm 41, which has a pivot shaft 40 standing upright as a pivot, is integrally attached to the 34. When the arm gear 34 rotates counterclockwise by the rotation of the cam gear 26, one end of the lock arm 41 faces a guide rail 45 described later, and a leaf spring 42 attached to the other end of the lock arm 41 integrates the cam gear 26 with the cam gear 26. It elastically contacts the outer peripheral surface of the upper cam 43.

Therefore, at the time of tape loading in which the arm gear 34 rotates counterclockwise by a predetermined angle about the pivot 38, the shaft gear 37 meshing with the fan gear 34a rotates counterclockwise, From the state shown in FIG. 16 (A), the pole arm 36 crosses the guide rail 45 shown in FIG. 1 and also crosses the front of the A / C head A _H fixed on the base plate,
It moves to the regular position as shown in FIG. In the stop mode, the lock arm 41, as shown in FIG.
The leaf spring 42 is in a position where it comes into contact with the small diameter portion 43a of the cam 43 to allow the movement of the middle pole 39, and at the time of recording / reproducing when the pole arm 36 rotates, the leaf spring 42 of the lock arm 41 moves. Sliding along the shape of the cam 43, the pole arm 36
After rotating to a predetermined stop position, the leaf spring 42
16B, the lock arm 41 moves to lock the base of the middle pole 39 and locks it, as shown in FIG. 16 (B).

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

The tape loading mechanism 15 is shown in FIGS. 1, 3 and 8
As shown in FIGS. (A) and (B), in order to wind the magnetic tape along the outer circumference of the guide drum 11 over an angle range of approximately 270 °, a supply-side guide groove 44a is formed on the left side of the magnetic tape, and a right-side guide groove 44a is formed on the right side. The upper guide rail 45 fixed on the chassis base 14 by forming the winding side guide groove 44b having a longer path than the supply side guide groove 44a, and the guide rail 45.
The upper part of the supply gear 33 and the lower part of the take-up gear 28, which are arranged in the lower part of the above-mentioned shape (ring), are roughly configured.

The guide grooves 45a and 44b of the guide rail 45 are parallel portions 44a ₁ and 44 on the front side of the insertion side of the tape cassette 1 shown in FIGS.
b ₁ and the arcuate portion 44 that is continuously provided with the parallel portions 44a ₁ and 44b _1.
It is composed of a ₂ and 44b ₂ . The guide groove 44a on the supply side is located on the chassis base 14, while the guide groove 44b on the winding side has the end of the arcuate portion 44b ₂ corresponding to the inclination angle and mounting height of the guide drum 11, and the magnetic tape. In order to maintain the horizontal position, the structure is sequentially displaced to the lower side of the chassis base 14 (three-dimensional inclined surface inclined inward from the central portion toward the rear side). Then, the end portion of the arcuate portion 44b _2, in order to position the pole base 57 which will be described later, a shape corresponding to the diameter of the vertical roller pole 58 to support the upper and lower vertical roller pole 58 thereon A substantially U-shaped stopper portion 13 in which a U-shaped recess 129a and a V-shaped recess 130a are formed, respectively.
1a is provided.

On the other hand, the end of the arc-shaped portion 44a ₂ on the supply side has a groove 44a ₂ ′ that is bent inward on the guide drum 11 side from the vicinity of this end, and a bent groove 44a that is bent on the opposite side to this groove 44a ₂ ′. ₂ "and it is more divided form into a substantially Y-shape. Then, the arc-shaped portion 44a _2" in the end of, in order to position the pole base 48 which will be described later as with the guide groove 44b of the take-up , This vertical roller pole to support the top and bottom of the vertical roller pole 46 on it
A substantially U-shaped stopper portion 131b in which a U-shaped recess 129b and a V-shaped recess 130b each having a shape corresponding to the diameter of 46 are formed.
(Shown in FIG. 10) are provided.

The vertical roller pole (vertical pole) 46 and the inclined loading pole (inclined fixed pole) 47, which are rotatably supported on the shaft, are vertically arranged in close proximity to each other to form a pole base 48.
The guide groove 44 of the guide rail 45 as shown in FIG. 13 and FIG.
When the position from the stop mode position to the loading end position is reached along a, the leading vertical pole 46 side is guided to the bending groove 44a ₂ ″, so that this pole base 48 is moved to the other bending groove.
Along the circular arc of 44a ₂ ′, the rearward tilted pole 47 side is pivotally displaced counterclockwise about the vertical pole 46, and at the same time,
The axis of the vertical pole 46 is positioned and supported by the U and V-shaped recesses 129b and 130b above and below the stopper 131b.

Here, when the pole base equipped with the vertical roller pole and the inclined pole moves to the loading end position,
Since the stopper provided near the loading end position has a U-shaped recess on the upper side and a V-shaped recess on the lower side, the vertical roller pole can be positioned reliably, and therefore the tape path can be set with high accuracy. Therefore, the reason why stable tape running is performed will be described.

When the loading operation is started, the pole base on which the vertical roller pole and the inclined pole are mounted moves toward the loading end position, and the upper and lower portions of the vertical roller pole come into contact with the U-shaped concave portion and the V-shaped concave portion, respectively. that time,
Due to the shape of the concave portion, the lower portion of the vertical roller pole first comes into contact with the V-shaped concave portion, and then, with this V-shaped concave portion as a reference (fulcrum), a moment acts in the upper direction of the vertical roller pole,
The upper part of this vertical roller pole comes into contact with the U-shaped recess. At this time, the action of the force on the upper portion of the vertical roller pole is restricted by the V-shaped concave portion as described above, and therefore the action of the force on the upper portion becomes small. Since the amount of movement of the pole is inevitably small, the vertical roller pole is reliably positioned, and the tape path is set with high accuracy, so that stable tape running is possible.

Next, specific configurations of the winding gear 28 and the supply gear 33 will be described with reference to FIGS. 8 (A) and 8 (B).

Both the winding gear 28 and the supply gear 33 are horizontally supported by a plurality of guide gears 49, 49 for guiding them, as shown in FIGS. It is arranged at intervals.

As shown in FIG. 8 (A), the winding gear 28 has a guide plate 53 that slides using the long holes 53a and 53b into which the pins 51 and 52 that are erected on the winding gear 28 are inserted as guides. , The guide plate 53 by the tension spring 61 stretched between them.
Regulates the relative movement of. On one side of the long hole 53a of the guide plate 53, a connecting rod 55 that is vertically displaced around a shaft 54 is rotatably supported.

57 is a pole base on the take-up side in which a vertical pole 58 rotatably supported by a shaft and an inclined fixed pole 59 are erected close to each other, and the lower part of the vertical pole 58 moves on the guide rail 45 as a guide shaft. And the stopper on the moving side tip
A tongue piece 57a that enters into 131 is formed. The pole base 57 is pivotally supported on the inclined fixed pole 59 side by the connecting rod 55 via the swing rod 60, whereby the winding gear 28 is rotated in a horizontal state and the action of the connecting rod 55 is exerted. It is possible to displace vertically as well.

Therefore, when the winding gear 28 is driven by the gear mechanism 16 and rotates counterclockwise to pass through the central portion of the guide rail 45 to reach the three-dimensional inclined surface, the pole base 57 and the guide Although the vertical distance between the rails 45 becomes large, the vertical movement of the connecting rod 55 surely reaches the loading end position as shown in FIGS. 13 and 17.

Further, three pins 62a, 62b, 62c are sequentially erected on the take-up gear 28 at predetermined intervals, respectively.
And 62a are located on the rear side of the guide plate 53 and drive a pinch roller cam 73 which will be described later.
c is a pin 6 for locking the eject lever 65 shown in FIG.
It is arranged at a position ahead of 2b and 62a on the rotational direction side.

On the other hand, as shown in FIG. 8 (B), the supply gear 33 is a winding gear.
A guide plate 64 having vertically extending pins 65 and 66 that slide using the long holes 34a and 34b as guides is placed on the upper surface of the guide plate 64 and is stretched between the two. The tension spring 67 regulates the relative movement. Then, on the guide plate 64, a connecting rod 70 is mounted, which is provided with a pin 68 standing upright and rotatable about a shaft 69. The pin 68 has a tongue piece 48a formed at the distal end on the moving side, and locks a pole base 48 in which a vertical pole 46 rotatably supported by a shaft and an inclined fixed pole 47 are erected close to each other. Then, the state shown in FIGS. 1 and 3 is maintained.

Here, referring also to FIG. 3 and FIGS. 18 (A) to 18 (C), the operation of the pinch roller 71 operated in association with the rotation operation of the winding gear 28 shown in FIG. 8 (A). explain.

When the winding gear 28, which is rotationally driven in the counterclockwise direction by the terminal gear assembly 25 via the gear mechanism 16, rotates by a predetermined angle, it is erected on the winding gear 28 as shown in FIG. 18 (A). The preceding pin 62b locks the first locking groove 73a of the 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 74 stretched between the spring pin 75 and the fixed pin 76 which are erected on the pinch roller cam 73. By the rotation of the pinch roller cam 73, the pinch roller arm 78 provided with the pinch roller 71 rotates counterclockwise about the shaft 77 via the link 81 connecting the connecting pin 79 and the spring pin 75. Then approach Capstan 80.

As the winding gear 28 continues to rotate in the counterclockwise direction, the next pin 62a located on the rear side moves to the second locking groove of the pinch roller cam 73 as shown in FIGS. 12 and 18 (B).
When it reaches 73b, the pinch roller cam 73 is rotated while further bending the reversing spring 74, so that the link 81 is further pulled in the direction of arrow D and the pinch roller arm 78 is rotated counterclockwise about the shaft 77. Let it be close to Capstan 80.

Thereafter, the rotation of the winding gear 28 causes the pin 62a to move to the loading end position as shown in FIG. 18 (C), beyond the line connecting the shaft 72, the spring pin 75 and the connecting pin 79 in a straight line. Due to the toggle action of the 82 and the reversing spring 74, the urging force acts in the radial direction of the pin 62a engaged with the second locking groove 73b of the pinch roller cam 73, so that the pinch roller cam 73 moves the spring 82. And the reversing spring 74 urges the turning force in the clockwise direction, so that the winding gear is stopped when the loading motor 19 is stopped.
The base of 28 is further urged by the rotational force in the forward direction.
The reliable positioning of 57 is performed.

At this time, the link 81 is moved in the D direction by the spring 82 stretched between the pin 81 and the pin 75, and elastically presses the pinch roller 71 to the capstan 80 (tape running state).

Here, the reel drive mechanism 17 is installed in FIG. 1, FIG. 2, and FIG.
A detailed description will be given with reference to FIGS.

As shown in FIG. 2, a cap motor 83, which has a flywheel 93 on its axis and drives a capstan 80, has a flange 88 fixed on the chassis base 14 via a pulley 84 and a belt 86 integrated with the flywheel 93. The pulley 87 of the oscillating gear structure 85 supported by the shaft 90 is driven to decelerate. Rotational force from the pulley 87 is transmitted to the input gear 89 of the oscillating gear structure 85 via a friction plate (felt, etc., not shown), so that the left and right attached to the flange 88 so as to mesh with the input gear 89. The pair of planetary gears 91 and 92 synchronously perform deceleration drive (reverse rotation drive).

The right planetary gear 92 of the oscillating gear assembly 85 is disposed close to the right side of the right planetary gear 92 as shown in FIGS. 2 and 5, and is brought into a state where it can be selectively meshed with the large diameter gear 95 rotating about the shaft 94. is there.
This large-diameter gear 95 is connected via a friction plate 96 to a large-diameter gear 97 at the lower part of the same diameter that rotates coaxially, and this large-diameter gear 97 further has a small gear at the upper part that rotates about a shaft 98. gear
It meshes with a small gear 99 that has 100 integrated. Therefore, the second
As shown in the drawing, when the tape cassette 1 is mounted on the apparatus 10, the supply reel hub 6 is fitted with a supply reel feather described later, and is positioned on each of the studs 101 and 102 and maintained horizontally. Thus, the upper small gear 100 meshes with the gear portion 7a on the outer peripheral surface of the take-up reel 7.

In FIGS. 1 and 4, reference numeral 104 denotes a brake arm supported by a shaft 105, and a tip end of the brake arm is biased in a clockwise direction by a torsion spring or the like (not shown) fitted in the shaft 105. Although the brake pad 106 of the above frictionally contacts the drum portion 95a of the large-diameter gear 95 to brake the drum portion 95a, the pinch roller 71 and the capstan 80 cause the magnetic tape to run in the forward direction, for example, during normal rotation such as during recording. Pinch roller
The brake pad 106 is connected to the drum section 9 in conjunction with the movement operation of 71.
The load on the drum portion 95a is released by moving the load away from 5a.

In addition, the other planetary gear located on the left side of the oscillating gear assembly 85
91 is selectively in mesh with a large-diameter gear 110 that serves as an input flange of a one-way clutch mechanism 109 in a supply-side reel disk structure 108 supported by a shaft 107 that stands upright from the chassis base 14. Then, this one-way clutch mechanism 109
On the outer peripheral surface of the internal rotating body 112, which provides an output connectable via the large-diameter gear 110 and the roller 111, one end is fixed to the chassis base 14, and the other end is described below in the tension arm 11
A tension band 114, which is connected to one end of an arm lever 113 connected to 9, is wound.

Therefore, when the capstan 80 rotates, the oscillating gear structure 85 rotates in the F direction, and the planet gear 92 meshes with the large diameter gear 95 on the right side to rotate this clockwise, so that the magnetic tape is wound. It is wound on the reel 7. At this time, the rotating body 11 on the supply side
The roller 111 does not enter the wedge-shaped recess formed in 2, the power is not transmitted to the rotating body 112, and the supply-side reel feather 127 is in a free state.

Here, the operation of the full width erasing head 116 which is operated in association with the tension arm 119, the arm lever 113 and the supply side pole base 48 will be described with reference to FIG. 1 again.

A tension arm 119 pivotally supported by a shaft 120 erected on the chassis 14 is pivotally supported at one end thereof.
The arm lever 113 is rotatably supported by the base 119a. The tension arm 119 is biased by a biasing means such as a torsion spring (not shown) in the counterclockwise direction, but is returned to the rest position in the stopped state shown in FIG. It is locked by 48 and stopped against the force of the torsion spring.

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

A head base 123 on which a full width erasing head 116 is mounted is rotatably supported on a shaft 122 supporting the impedance roller 115, and a rotating force in a clockwise direction is biased by a spring (not shown). The one end locking portion 123a of the head base 123 faces the pin 124 of the tension arm 119 so as to be locked.

Therefore, when loading the tape, the pole base on the supply side
48 is a guide groove on the supply side with the vertical roller pole 46 as the leading end.
When moving to the loading end position in 44a,
Since the tension arm 119 in the state shown in FIG. 1 gradually separates from the pole base 48 during the movement process of the pole base 48 from the parallel portion 44a ₁ to the arc-shaped portion 44a ₂ as shown in FIG. 19A, The tension arm 119 is released from the locked state, and the self-returning force of the torsion spring allows the turning force (returning force) of the shaft 120 about the shaft 120 in the counterclockwise direction. By the rotation of the tension arm 119, the pin 124 locks the one-end locking portion 123a of the head base 123 on which the full width erasing head 116 is mounted as shown in FIG.

With the pin 124 in contact with the head base 123 due to the rotation of the tension arm 119, the pole base 48 on the supply side continues to move, whereby the pole base 48 comes into contact with one side of the head base 123, The head base 123 is rotationally displaced counterclockwise about the shaft 122. The tension arm 119 is slightly rotated clockwise by the rotation of the head base 123, so that the tension band 114 is in a relaxed state. Then, when the pole base 48 reaches the loading end position, the head base 123, which has been rotationally displaced to the state shown in FIG. 19B, pivots back around the shaft 122 in the clockwise direction, and As shown in C), it is set at the intended setting position. At the same time when the tension arm 119 rotates, the arm lever 113 is moved to the position shown in FIG. 19 (C).
As shown in FIG. 7, the rotating body 112 is attracted in the Y ₁ direction and a braking force is applied to the rotating body 112 to prevent its rotation.

Here, the operation of the magnetic recording and / or reproducing apparatus 10 configured as described above will be specifically described. The series of operations of each component is performed by the mode sensor unit 128 provided on the cam gear 26 shown in FIG.

When the tape cassette 1 as shown in FIG. 9 is inserted into the cassette holder (not shown) floating from the upper surface of the apparatus in the stop mode state shown in FIGS. By the action of a pantograph mechanism (not shown) provided in the lower part, the pantograph mechanism descends to a predetermined position on the apparatus side, and preparation for tape loading is completed.

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

When the apparatus is in the stop mode state shown in FIG. 1, when the power switch is turned on and then the eject switch is pressed, the loading motor 19 rotates in the reverse direction and the winding gear 28 is rotated.
The pin 62c locks the eject lever 65 and rotates the eject lever 65 counterclockwise about the shaft 130 as shown in FIG. By the rotation operation of the eject lever 65, the locked state of the lower part of the pantograph mechanism of the cassette holder (not shown) locked to this is released, and the cassette holder is raised. At this time, the supply-side pole base 48 and the winding-side pole base 57 are slightly retracted to the parallel portions 44a ₁ and the bent portions 44b ₃ of the guide grooves 44a and 44b, contrary to the moving direction at the time of loading. This eject mode is set to the mode sensor unit 12
Upon detection by 8, the eject lever 65 and each of the bases 48 and 57 are returned to the positions shown in FIG. Then, by inserting the tape cassette 1 shown in FIG. 9 into the raised cassette holder and lowering the cassette holder toward the apparatus side, for example, the locking means provided in the cassette holder and the fixing pin provided in the apparatus are provided. Upon engagement, the cassette holder is mounted in place on the device.

When the tape cassette 1 is mounted at a predetermined position of the device 10 as shown in FIG. 2, the loading motor 19 starts to rotate in the normal direction as described above, and the terminal is connected via the worm gear 20, the worm wheel 21 and the like connected thereto. The gear structure 23 is decelerated. By driving the terminal gear assembly 23, this driving force is transmitted to the winding gear 28 of the tape loading mechanism 15 via the intermediate gear 27 provided therein, and this is shown in the counterclockwise direction in FIG. 3 in FIG. The guide drum 11 is driven to rotate. On the other hand, the winding gear 28 drives the large gear 31, the small gear 32, etc. of the gear structure 30 meshed with the take-up gear 28 via the idle gear 29, so that the driving force is applied to the tape loading gear 28. It is transmitted to the supply gear 33 of the mechanism 15, and in synchronization with the winding gear 28, this is turned clockwise in FIG.
Moreover, it is rotated around the guide drum 11 shown in FIG.

Further, by driving the terminal gear structure 23, the cam gear 26 integrated with the cam gear mechanism 25 connected thereto is rotationally driven. As a result, the spiral cam groove of the cam gear 26
The arm gear 34 having the pin 26a and the pin 35 locked to the pin 26a is rotated counterclockwise from the state shown in FIG. 16 (A) to the state shown in FIG. 16 (B). By the rotation of the arm gear 34, the fan 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, and the pole arm 36 is rotated clockwise about the pivot shaft 38. Rotate.

Therefore, the pole arm 36 having the middle pole 39 rotates clockwise across the guide rail 45 and the fixed A / C head A _H , and the middle pole 39 is changed from the state shown in FIG. When it moves to the proper position as shown in B), the lock arm 41 uses the pivot shaft 40 of the arm gear 34 as a pivot fulcrum.
The leaf spring 42 moves along the shape of the cam 43 with a delay to lock and fix the base portion of the middle pole 39. Further, by driving the supply gear 33 arranged on the upper side of the tape loading mechanism 15, the supply-side pole base 48 having the vertical roller pole 46 and the inclined fixed pole 47 connected to the supply gear 33 first moves on the guide rail 45. It is rotated clockwise in the figure to a predetermined position.

As the pole base 48 on the supply side moves, the tension arm 119 locked by the pole base 48 and biased by a torsion spring in the counterclockwise direction has the same tension arm 119 from the state shown in FIG. 19 (A). As shown in the figure (B), the lock state is released and the pin 124 is rotated counterclockwise.
Locks one end locking portion 123a of the head base 123.

Further, the rotation of the tension arm 119 causes the pin 124 to come into contact with the head base 123, which is further moved by the continuous movement of the supply side pole base 48.
Is further rotated and displaced.

This rotation of the head base 123 causes the tension arm 1
Since 19 rotates slightly clockwise, the band 114 moves in the Y ₂ direction and the supply reel feather 127 is maintained in a relaxed state.

When the supply-side pole base 48 is rotationally displaced counterclockwise by the bending groove 44a 'to reach the loading end position as shown in FIG. 19C, the rotationally displaced head base 123 is rotated. It returns clockwise around 122 and is set to the desired setting position, and the tension band 114 is Y
_It is attracted in _one direction to exert an additional force on the reel disk and exert a back tension on the magnetic tape.

On the other hand, a take-up side pole base 57 having a vertical roller pole 58 and a tilted fixed pole 59 connected to the take-up gear 28 arranged below the tape loading mechanism is driven to move above the guide rail 45. When it rotates counterclockwise in FIG. 1 by a predetermined angle, the preceding pin 62b erected on the winding gear 28 moves to the first position of the pinch roller cam 73 supported by the shaft 72 as shown in FIG. 18 (A). The first locking groove 73a is locked.

Therefore, the pinch roller cam 73 is a spring pin erected on this.
It rotates clockwise about the shaft 72 against the force of the reversing spring 74 stretched between the 75 and the fixing pin 76.

By the rotation of the pinch roller cam 73, the pinch roller 71
A pinch roller arm 78 provided with a connecting pin 79 and a spring pin
A pin 81 is rotated counterclockwise about a shaft 77 via a link 81 connecting 75 to bring the pinch roller 71 close to the capstan 80 side.

When the winding gear 28 continues to rotate clockwise, the next pin 62a reaches the second engaging groove 73b of the pinch roller cam 73 as shown in FIG. 18 (B). Since the pinch roller cam 73 is rotated while bending the 74, this time the link 81 is pulled in the direction of the arrow D in FIG. 3, and the pinch roller arm 78 is rotated counterclockwise about the shaft 77 to move the cap. When the pin 62a crosses the line connecting the shaft 72, the spring pin 75, and the connecting pin 79 to reach the loading end position by the rotation of the winding gear 28, the pinch roller cam 73 reverses the reversing spring. 74
Since the clockwise turning force is urged by the toggle action, the pole base 57 is surely positioned by further urging the winding gear 28 in the rotation direction.

At the same time as positioning the pole base 57, pinch rollers
Since the link 81 connecting the 71 and the pinch roller cam 73 is separated from the shaft 72 in the state of FIG. 18B from the state of FIG. 18B, the spring 82 stretched between them is separated from the pinch roller 71. Capstan 80 is elastically crimped. Further, the elastic force acts in the same direction as the action direction of the reversing spring 74, and assists the pushing force of the reversing spring 74 on the pole base 57. That is, the spring 82 functions as a second toggle spring. (Rec Pause state in FIG. 13 ... Capstan 80 stopped) The pole base 57 on the take-up side is positioned at a three-dimensional plane as shown in FIG. 57a enters into the stopper portion 131b. As a result, the pole base 57 is attached to the upper surface of the tongue piece 57a at its tip and the stopper portion 1
Rotation around the X-axis is restricted so that the stopper 131b and the guide rail 45 sandwich the stopper 31b and the guide rail 45, and the pole base 57 is also crimped. You can do it. Because of this, the upper U
The letter-shaped recess 129b does not cause any trouble even if it has a slight play dimension in the depth direction of the recess. The axis of the vertical roller pole 58 is the U-shaped concave portion 12 above the stopper 131b.
By supporting the upper and lower sides with a predetermined span in the 9b and the lower V-shaped concave portion 130b, the Y of the pole base 57 is reduced.
By regulating the rotation around the axis, the positioning accuracy of each pole is improved. Further, the rotation of the pole base 57 about the Z axis is restricted by the guide groove 44b. Therefore,
Since the rotation of the pole base 57 about the X-axis, the Y-axis, and the Z-axis is completely controlled by each element, stable tape running can be performed and the stopper portion 131b can be easily processed.

Further, as shown in FIG. 10 (A), the pole base 48 on the supply side is held between the guide rail 45 by being supported by the tongue piece 48a and the stopper portion 131a at the tip end portion, similarly to the pole base 57. Thus, the rotation around the X axis is restricted. Further, the vertical pole 46 is supported in the U and V-shaped concave portions 129a and 130a of the stopper portion 131a in the same manner as above, respectively, so that the vertical pole 46 is similar to the pole base 57 on the winding side. Positioning is surely performed on the guide rail 45 in a state where rotation in the three axial directions is restricted. And
The magnetic tape 2 sent from the supply reel hub 6 is the 13th
As shown in the figure, after the guide drum 11 is attached from the vertical pole 46 and the inclined pole 47 on the supply side through the impedance roller 115 and the full width erasing head 116, the vertical roller pole on the winding side.
58, the inclined pole 69 is attached, and further, the middle pole 39 and the A / C head A _{H, which} are rotationally displaced, are attached, and then they are held by the capstan 80 and the pinch roller 71 to reach the take-up reel hub.
In this tape loading state, the vertical roller pole 46 supported in the U- and V-shaped recesses 129a and 130a is in a direction substantially orthogonal to the direction in which the tape tension acts by the rotation of the supply-side pole base 48. Therefore, even if the pressure of the pole base 48 is weak, each pole will not fall down.

By positioning the pole bases 57 and 48 as described above, the vertical roller poles 46 and 58 can be downsized and the pole bases 57 and 58 can be reduced in weight.

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

The clockwise rotational force from the pulley 87 is transmitted via an unillustrated friction plate (felt) of the input gear 89 of the oscillating gear structure 85, and is attached to the flange 88 so as to mesh with the input gear 89. One of the pair of left and right planetary gears 91, 92 is meshed with the gear 92, which is rotated counterclockwise and transmitted to the large diameter gear 95 on the lower side of the winding side.
Is transmitted to the upper large diameter gear 97 on the take-up side via this and the rotational force is transmitted to the small gear 99.

Therefore, in this state where the tape cassette 1 is mounted, the rotational force transmitted to the small gear 100 is transmitted to the gear portion 7a on the outer peripheral surface of the take-up reel 7 in the cassette to rotate it. (Rec state in Fig. 13) When the recording switch is turned on again, the capstan motor
83 switches from the clockwise normal rotation state to the counterclockwise reverse rotation state.

Along with this switching, the planetary gear 91 meshes with the large-diameter gear 110 on the supply side that serves as the input flange of the one-way clutch mechanism 109, and the rotational force from the capstan motor 83 is transmitted. It is transmitted to the supply reel feather 127 via the friction plate 125 and the coil spring 126, the supply reel 6 in the cassette is rotated, and the tape wound on the winding side reel for several frames is wound up to the supply side in reverse. 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 rotational displacement angle of the input gear 89 can be suppressed to a minimum, so that the slack of the magnetic tape is prevented. can be suppressed to a minimum, as well as reduce the tape damage can be read control pulse precisely by a / C head a _H.

At this time, the one-way clutch mechanism inside the supply-side reel disc
Because the roller 111 of 109 is on the escape side, the tension band 11
Winding is possible even when 4 is braked.

Thereafter, the capstan motor 83 is advanced again in the forward direction by a few frames smaller 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 normally driven by the normal rotation of the capstan motor 83.

When the power switch is turned off in this Rec or Rec Pause state (state shown in FIG. 13), the loading motor 19 rotates in the reverse direction as described above, and the loading ring rotates in conjunction with this, and the pinch roller is capped. Separate from Stan. This state is detected by the mode sensor, and the apparatus again enters the Rec lock state as shown in FIG.

After that, except for continuous recording, the power switch is turned off after a certain period of time.

When the power switch is turned on again, the loading motor
19, the normal rotation, as shown in Fig. 13, the Rec Pause state,
After that, when the recording switch is turned on, the recording mode is entered and predetermined recording is performed.

When the predetermined recording is completed and the eject switch (not shown) is turned on, the loading motor 19 is rotated in the reverse direction to be in the unloading state.

Pin of loading 33 on the winding side in the unloading state
62c pushes the eject lever 65 to release the engagement with the locking means of the cassette housing, and raises the cassette housing. As a result, the tape cassette 1 can be taken out.

When the mode sensor unit 128 detects the eject mode, the loading motor 19 rotates in the normal direction and enters the stop mode state shown in FIGS. 1 and 3.

In the embodiment of the present invention, only recording has been described, but it goes without saying that reproduction can be performed in the same manner.

(Effect of the Invention) As described above, according to the magnetic recording and / or reproducing apparatus of the present invention, the vertical roller pole and the inclined pole for guiding the magnetic tape on the inlet side and the outlet side of the tape guide drum are mounted. When the supply side loading means and the winding side loading means having the above pole base reach the tape loading end position, the vertical roller pole on the pole base is supported by the stopper portion at the upper portion thereof by the U-shaped concave portion. In addition, since the lower part is supported by the V-shaped recesses respectively, the vertical roller poles are positioned accurately, and the tape path is set with high accuracy, so stable tape running is possible. There are practical advantages such as

[Brief description of drawings]

1 to 5 show a stop mode state before mounting a tape cassette of a preferred embodiment of a magnetic recording and / or reproducing apparatus according to the present invention, and FIG. 1 shows a magnetic recording and / or reproducing apparatus according to the present invention.
Alternatively, a schematic plan view excluding tape guide means such as a loading ring of the reproducing apparatus, FIG. 2 is a right side view of FIG. 1, FIG. 3 is a plan view showing a pole base drive system including a loading ring, and FIG. FIG. 5 is a plan view showing a tape reel drive system including a capstan, FIG. 5 is a longitudinal sectional view of FIG. 4, and FIG.
Figures (A) and (B) are a schematic sectional view and an external perspective view of the guide drum, FIG. 7 is a side sectional view of the gear mechanism shown in FIG. 1, and FIGS. 8 (A) and (B) are supply side loadings. FIG. 9 is a perspective view of a small tape cassette mounted and used in the recording and / or reproducing apparatus of the present invention, FIG. 10 (A) and FIG. 10 (B) are assembly plan views of the ring and the winding side loading ring. FIG. 11 is a side view showing the relationship between the stopper portion and the pole base, FIG. 11 is a plan view showing the states of the eject lever and the pole base in the eject mode, FIG. 12 is an operation explanatory diagram in the loading mode, and FIG. 13 is Rec. Fig. 14 is a diagram for explaining the operation in the mode, Fig. 14 is a diagram showing the state of the pole base and the head base when the loading is completed, Fig. 15
Fig. 16 is a diagram for explaining the operation of the head base during loading, Figs. 16 (A) and (B) are diagrams for explaining the operation of the pole base that cooperates with the arm gear, and Fig. 17 is a diagram for explaining the movement process of the pole base. 18 (A) to (C) are operation explanatory views showing the operation of the pinch roller which cooperates with the pinch roller cam.
19 (A) to 19 (C) are operation explanatory views showing the relationship between the tension arm and the pole base and the head base that cooperates, FIG. 20 is a timing chart, FIG. 21 is a perspective view of the pole base mechanism, 22 (A) and 22 (B) are side views showing the positioning of the conventional pole base. 1 ... Tape cassette, 11 ... Guide drum, 46, 58 ... Vertical roller pole, 47, 59 ... Inclined pole, 48, 57 ... Pole base, 48a, 57a ... Tongue piece, 129a, 129b ... U-shaped recess, 130a, 130
b ... V-shaped concave portions, 131a, 131b ... Stopper portions.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References 60-60347 (JP, U) Actual 60-16348 (JP, U) Actual 63-118732 (JP, U) Actual

Claims (1)

[Scope of utility model registration request] 1. A supply having a pole base for mounting a vertical roller pole and an inclined pole for pulling out a magnetic tape from a tape cassette mounted on the apparatus and guiding the magnetic tape on an inlet side and an outlet side with respect to a tape guide drum. A magnetic recording and / or reproducing apparatus comprising a side loading means and a winding side loading means, wherein the magnetic tape is wound around the tape guide drum over a predetermined angle range. The upper portions of the vertical roller poles provided in the loading means and the winding-side loading means are supported by the U-shaped concave portions formed in the stopper portion provided near the loading end position, and the lower portions are respectively supported by the V-shaped concave portions. A magnetic recording and / or reproducing apparatus, characterized in that