KR900009032Y1 - Magnetic recording or reprodueing system - Google Patents

Abstract

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Description

Magnetic recording / playback device

1 is a plan view of one embodiment of a magnetic recording / reproducing apparatus of the present invention.

2 is a plan view for explaining the mechanism for driving the tape loading member.

3 is a side view showing the main part of the present invention.

4 is a side view of the ring gear and its drive mechanism.

5A is a plan view of a guide rail formed around the guide groove.

Section 5b extending to V _B -V _B during 5a.

A cross section connecting to V _C -V _C during 5c or 5a.

6 is a plan view of a state in which the tape loading member is pressed against the pressing member.

7 is a plan view of the state in which the pressure member is displaced in the direction of separation when the tape loading member moves.

8 is a perspective view for explaining a loading state.

9A is a side view showing a guide pole in a state of reaching upon unloading.

9b is a side view showing a state in which the guide pole stands up during loading.

* Explanation of symbols for main parts of the drawings

2: rotating drum 3: tape cassette

4: magnetic tape 7, 8: tape loading member

8d: protrusions 9, 10: guide groove

9a, 10a: guide rail 12: guide pole

15: connecting member 16: coil spring

24, 26: loading pole 26a: top

29, 30: stopper 26a: top

29, 30: stopper 30a: locking portion

31, 32: ring gear 32a: engagement portion

32a1, 32a2: slope 45: loading motor

47: protruding pin 48: roller

49: axis 51: protrusion

The present invention relates to a magnetic recording / reproducing apparatus, and more particularly, to a magnetic recording / reproducing apparatus configured such that a tape loading member for attaching a magnetic tape in a tape cassette to the outer circumference of a rotating drum is pressed against a stopper at a tape loading completion position.

Background Art Conventionally, as a magnetic recording / reproducing apparatus which records / reproduces a magnetic tape on a rotating drum having a rotating head such as a VTR, for example, by miniaturizing the outer diameter of the rotating drum, a miniaturized device is known. In such a device, a small hardening of the rotating drum increases the acute angle range of the magnetic tape with respect to the rotating drum, and the magnetic tape is guided to the pole of the tape loading member moving in tandem with the guide rail on the chassis to return upward in the tape travel direction. Drive as inclined as possible. Thus, when the tape loading member is moved to the loading completion position where the magnetic tape is attached to the rotating drum, the guide rail for guiding the movement of the tape loading member so that the pole of the tape loading member is inclined at an angle by the tape completion position is three-dimensional. Is formed into a curved surface.

However, since the bottom face of the tape loading member which slides on the guide rail surface is flat while the guide rail is curved, the tape loading member is provided to be inclined with respect to the guide rail. For this reason, in the conventional apparatus, the tape loading member is moved to the loading completion position in accordance with the rotation of the rotating body that transmits the rotational driving force from the driving source, and the stopper fixed to the chassis is brought into contact with the stopper. It was made to say. For this reason, the tape loading member became a press part in the state which does not incline with the press member, and guided the magnetic tape stably.

However, in the conventional magnetic recording / reproducing apparatus having the above constitution, since the pressing member is always displaced in the direction of pressing the tape loading member with the stopper, the tape loading member can be moved between the unloading position and the tape sticking completion position. At that time, the tape loading member was in contact with the pressing member and moved. Therefore, in the conventional magnetic recording / reproducing apparatus, since the tape loading member is brought into contact with the pressurization doubling not only at the tape-attached position but also during movement, when the tape loading member moves, the pressurization of the pressing member acts as a load, and the tape loading member There was a drawback that the smooth movement of.

The object of the present invention is to provide a magnetic recording / reproducing apparatus which eliminates the above defects.

The present invention provides a pair of rotating bodies which are provided up and down under the rotating drum, and which rotate in opposite directions from a driving source via a deceleration mechanism and an inverting mechanism, and from the tape cassette in response to the rotation of the respective rotating bodies. The tape loading member on the magnetic tape supply side and the tape loading member on the magnetic tape winding side connected to each of the rotating bodies which are pulled out of the magnetic tape and attached to the outer circumference of the rotating drum, and the tape loading members on the magnetic tape sticking completion position. A magnetic recording / reproducing apparatus having a pressing member adapted to press the tape loading member on the magnetic tape winding side of the tape loading member to the stopper when abutting against the stopper, wherein the tape loading member on the magnetic tape winding side When passing through the vicinity of the pressing member, so as not to contact the pressing member, An engagement portion is formed in the pivot connected to the tape loading member on the magnetic tape supply side, so that the engagement portion engages with the pressing member to displace the pressing member in the avoiding direction so that the movement of the tape loading member is made stable and smooth. It is.

1 and 2 show one embodiment of a magnetic recording / reproducing apparatus of the present invention. In both figures, the rotating drum 1 is provided on the chassis 1. The rotating drum 2 is provided with four video heads (rotating heads) at 90 ° intervals therein, the drum diameter is 2/3 smaller than the conventional one, and the magnetic tape is wound at 270 ° or more.

(3) is a tape cassette, and has a supply reel (5) and a winding reel (6) wound around a magnetic tape (4). (7) and (8) are tape loading members, respectively, and the tape loading member 7 is disposed on the supply shaft of the magnetic tape 4, and the tape loading member 8 is disposed on the winding side of the magnetic tape 4. It is. At the time of unloading, each of the tape loading members 7 and 8 is waiting at the position shown by the dashed-dotted line, and as described later, the tape loading members 7 and 8 are connected to the arc-shaped guide grooves 9 and 10 to the tape-attached position shown by the solid lines. Move.

In addition, the tape loading subsidiary materials 7 and 8 move in accordance with the rotation of the pair of ring gears 31 and 32 squeezed from the lower surface of the chassis 1 as described later.

As shown in FIG. 2, FIG. 3, and FIG. 8, 48 is a pressing member, and rotation is supported by the shaft 49 on the lower surface of the chassis 1 freely. Moreover, the press member 48 is equipped with the pin 48a which protrudes on the upper surface of the chassis 1 from the elongate hole 1e of the chassis 1, and the roll furnace 48b which protrudes below. 50 is a torsion spring, wound around the outer circumference of the bearing portion 48c of the pressing member 48 into which the shaft 49 is inserted, and one end 50a is locked to the front end side of the pressing member 48, and the other end thereof. 50b is locked to the chassis 1. For this reason, the pressing member 48 is rotationally pressurized counterclockwise by the elasticity of the torsion spring 50. As shown in FIG.

Moreover, as shown in FIG. 3, the pin 48a of the press member 48 protrudes in the position of the height which can contact the tape loading member 8 which moved to the tape adhesion completion position, and the roller 48b ) Protrudes at the position in contact with the ring gears 31 and 32.

The ring gears 31 and 32 are provided on the outer circumference, and the inner and outer diameters thereof are the same diameter, respectively, and are hit up and down on the same axis. For this reason, the press member 48 is added to the torsion spring 50, and the roller 48b is made to contact the outer periphery of the ring gear 31,32. In addition, the lower ring gear 32 has an engaging portion 3a protruding in the radial direction from the outer circumference. Incidentally, the inclined portions 32a ₁ and 32a ₂ are provided on both sides of the engaging portion 32a. As the ring gears 31 and 32 rotate, the outer circumferences of the ring gears 31 and 32 come into contact with the rollers 48b of the pressing member 48 so that the ring gears 31 and 32 rotate. The engaging portion 32a of the gear 33 abuts against the roller 48b, and the pressing member 48 rotates clockwise.

11 is an abutting part (broken line of FIG. 1 and FIG. 8) which is an arc-shaped object which contacts and displaces the arm part 11a which makes the front-end | tip abut on the wall part 1a, and the annular protruding pin mentioned later. The contact part 11b and the rib 11c provided in the side of the contact part 11b are provided, and are supported by the shaft 1b below the chassis 1.

In addition, the abutting member 11 is integrally molded by a synthetic resin, and the arm 11a is elastically displaced by the rotational displacement of the abutting portion 11b as described later.

12 is provided near the guide polo and the guide groove 10, and is supported by the mounting member 13 fixed to the upper surface of the chassis 1. In addition, the guide pole 12 is connected to the distal end of the abutting portion 11b of the abutting member 11 via the connecting member 15 and the coil spring 16. Rotation displacement by rotation.

Further, the guide pawl 12 falls when the tape loading members 7 and 8 are in the unloading position (Fig. 9A), and stands up by moving the tape loading members 7 and 8 to the tape-attached position. 9b).

In addition, as shown in FIG. 1, the audio canceling head 18 and the audio control signal recording / reproducing head 19 are fixed to the upper surface of the head arm 17 which is rotatably supported on the chassis 1. In addition, the head arm 17 is rotated to a position indicated by a dashed line at the time of unloading, and the tape loading members 7 and 8 are rotated to a position indicated by a solid line as the tape loading members move to the tape-attached completion position. (18,18) is attached to the magnetic tape (4).

In addition, the full width erasing head 21 is fixed to the upper surface of the head arm 20 supported by the upper surface of the chassis 1. Reference numeral 22 is an impedance roller, which is provided on the upper surface of the impedance roller arm 23 that engages and rotates with the head arm 20.

Next, a driving mechanism for driving the tape loading members 7 and 8 and a mechanism related thereto will be described.

The tape loading member 7 on the left side during FIGS. 2 and 8 holds the supply-side loading pawl 24 by the vertical axis of the upper surface, and has the inclined pawl 25 near it. Further, the tape loading member 7 on the left side is wound around the rotary drum 2 to guide the magnetic tape 4 to the inlet side.

The tape loading member 8 on the right side holds the loading pawl 26 wound by the upright shaft and has an inclined pawl 27 near this, as shown in parallel with FIG. 4. The guide groove 9 for guiding the movement of the tape loading member 7 on the left side is formed on the flat chassis 1. For this reason, the tape loading member 7 stably moves on the guide rail 9a provided in the peripheral edge part of the guide groove 9. In addition, the tape loading member 8 on the right side corresponds to the fact that the magnetic tape is wound about 270 ° around the outer circumference of the rotating drum 2, and as shown in FIGS. It is stopped by tilting at an angle of. For this reason, the guide groove 10 which guides the movement of the tape loading member 8 is continuously formed by the unloading position by the unloading position, as shown to FIG. 4 and FIG. 5A, and 3 It gradually descends while turning in dimensions. Therefore, the guide rail surface 10a provided in connection with the peripheral edge of the guide groove 10 is formed in the curved shape as shown to FIG. 5A, 5B, 5C.

In other words, the guide rail 5a during the surface (10a) is P ₀ and the straight section (10a ₁₎ between -P _1, and the inclined part (10a ₃₎ between the P ₂ -P _3, and a flat portion (10a ₁₎ ramp ( It consists of a torsional portion 10a ₂ that descends while continuing to rotate 10a ₃ ). As shown in FIG. 4, the flat part 10a ₁ protrudes upwards from the chassis 1, and the guide rail surface 10a is located in the dimension H higher than the chassis 1. As shown in FIG. In addition, as shown in FIG. 5B, the guide rail surface 10a of the flat part 10a ₁ is horizontal. The inclined portion 10a ₃ is inclined downward at a predetermined angle and has a cross-sectional shape shown in FIG. In addition, as shown in FIG. 4, the inclined portion 10a3 reaches the bottom of the chassis 1 at its end. For this reason, are connected by a flat part (10a1) and the inclined portion (10a ₃₎ the twist part (10a ₂₎ of the curved surface, the drop in the inner peripheral side of the guide rail face (10a) and down going curvature than the outer peripheral side between the have.

In addition, as shown in FIG. 4, in the tape loading member 8, the two guide protrusions 8a and 8b which penetrated in the guide groove 10 protrude from the lower surface. In addition, the tape loading member 8 is pushed to the guide rail surface 10a of the guide groove 10 by the leaf spring 28 screwed and fixed to one guide protrusion 8a. This configuration is also the same for the tape loading member 7 on the left side.

At the end of the guide grooves 9 and 10, stoppers 29 and 30 (FIG. 2) for positioning the tape adhesion completion positions of the tape loading members 7 and 8 are provided. Moreover, below the rotating drum 2, the lower annular ring gear (rotary body) 32 which moves the left tape loading member 7, and the upper side which moves the right tape loading member 8 is moved. The annular ring gear 31 is integrated. Moreover, the pair of ring gears 31 and 32 are supported by the guide roller 33 provided in the lower surface of the chassis 1 against three places (2nd figure) of the inner periphery.

The large diameter 34a of the reduction gear 34 is meshed with the upper ring gear 31, and the reverse gear 35 is connected to the small diameter gear 34b of the reduction gear 34 and the lower ring 32. This is interlocking.

The lower ring gear 32 has a guide piece 36 which is a resin resin molded article. It is provided so that sliding is possible in the shape of the cross section of the ring gear 32.

Between the ring gear 32 and the guide piece 36, a coil spring 37 crosses long. As a result, the ring gear 32 can move the tape loading member 7 via the coil spring 37 and the guide piece 36.

An arc-shaped ball 31b is formed in the upper ring gear 31, and one end of the arc-shaped guide plate 38 is supported by the caulking pin 39 so as to be movable. A pin 40 is provided at the tip of the guide plate 38, and the upper portion of the pin 40 is fitted into the arc 8c of the tape loading member 8 through the guide groove 10. In addition, the base of the guide plate 38 and the ring gear 31 are connected by a coil spring 41.

42 is a loading gear, and is provided below the chassis 1 coaxially with the large-diameter gear 42a provided with the small-diameter gear 42b provided in the ring gear 31, and the large-diameter gear 42a. have.

43 is a transmission gear, the large-diameter gear 43a which meshes with the small-diameter gear 42b of the loading gear 42, the small-diameter gear 43b provided above the large-diameter gear 43a, and the small-diameter gear 43b. It is comprised by the cam part 43c provided above (), and is supported by the shaft 1c of the lower side of the chassis 1.

The cam gear 44 includes the engagement gear 44a which meshes with the small-diameter gear 43b of the transmission gear 43, the cam part 44b which engages with the cam part 43c, a plurality of cam grooves (not shown), etc. Equipped with. 45 is a loading motor that rotates in the forward and reverse directions to rotationally drive the cam gear 44 via the gear 46. Accordingly, the rotational driving force of the loading motor 45 is transmitted to the ring gears 31 and 32 via the gear 46, the cam gear 44, the transmission gear 43, and the loading gear 42 to load and unload the operation. This is done.

As shown in FIG. 4, the protruding pin 47 is provided below the ring gear 32. As shown in FIG. In addition, the protruding pin 47 protrudes at an abutting position of the abutting portion 11 by the rotation of the ring gear 32.

Next, with reference to FIG. 6, FIG. 7, and FIG. 8 by an operation | movement at the time of loading, it demonstrates. 6 is a plan view showing a loading completion state, FIG. 7 is a plan view when the tape loading completed member passes in front of the pressing member, and FIG. 8 is a perspective view showing the loading state.

First, at the time of unloading shown in FIG. 2, the tape cassette 3 is mounted in the apparatus and then play operation is performed. The loading motor 45 is started by the play operation, and the cam gear 44 is driven clockwise via the gear 46. In addition, the rotational driving force from the cam gear 44 is decelerated by the transmission gear 43 and the cam gear 44 and transmitted to the upper ring gear 31. And since the loading gear 42 rotates clockwise, the ring gear 31 is driven in the arrow C direction. In addition, by the rotation of the ring gear 31, the lower ring gear 32 rotates in the direction of the arrow D via the reduction gear 34 and the inversion gear 35.

Therefore, the tape loading member 7 on the left side is pulled through the guide piece 36 by the lower ring gear 32 that rotates in the direction of arrow D, and the guide groove 9 from the unloading position shown in FIG. ), It moves to the tape adhesion warmer position shown in FIG. 1 and FIG. In addition, the tape loading member 8 is pulled through the guide plate 38 and the pin 39 by the upper ring gear 31 that rotates in the direction of arrow C, and moves from the unloading position to the tape sticking completion position. Move.

In this way, the tape loading members 7 and 8 move to the unloading position, and the magnetic tape 4 is pulled out of the tape cassette 3 to perform a loading operation. When the loading operation is performed, the protruding pins 47 are displaced in the same direction together with the rotation in the direction of the arrow D of the lower ring gear 32. In addition, as the ring gear 32 rotates, the tape loading member 8 pulled by the ring gear 31 passes near the guide pawl 12.

When the tape loading member 8 reaches the vicinity of the guide pawl 12, the protruding pins 47 abut against the abutting portion 11.

Again, the ring gear 32 rotates in the direction of the arrow D, and after the tape loading member 8 passes near the guide pawl 12, the abutting portion 11 is pressed against the protruding pins 47 and the ring It rotates and displaces in the circumferential direction of the gear 32. For this reason, the guide pole 12 rotates and stands up via the connecting member 15 which is displaced with the abutting part 11. The timing at which the guide pawl 12 stands up is after the tape loading member 8 passes through the guide pawl 12 (FIG. 9B). The tape loading member 8 passes in front of the guide pawl 12 by the rotation of the ring gears 31 and 32, and then comes in front of the pressing member 48. Immediately before the tape loading member 8 passes in front of the pressing member 48, the engaging portion 32a of the ring gear 32, which rotates in the direction of the arrow D, abuts against the roller 48b of the pressing member 48. All. For this reason, the roller 48b which was wet to the outer periphery of the ring gears 31 and 32 engages with the inclination part 32a ₁ of the ring gear 932 with rotation of the ring gears 31 and 32. As shown in FIG. While the roller 48b moves the inclination 32a ₁ of the engaging part 32, it is gradually displaced in the outer peripheral direction, and it contacts with the outermost part of the engaging part 32a.

Therefore, as shown in FIG. 7, the pressing member 48 is rotated clockwise by contacting the engaging portion 32a of the ring gear 32 just before the tape loading member 8 arrives.

The pin 48a which has entered the guide rail 10a in which the tape loading member 8 slides by the rotation of the press member 48 is displaced in the direction away from the guide rail 10a.

Moreover, while the ring gears 31 and 32 are rotated so that the outermost peripheral portion of the engaging portion 32a of the ring gear 32 is in contact with the roller 48b of the pressing member 48, the tape loading member 8 Passes through the front of the pressing member 48. Therefore, the tape loading member 8 is moved without touching the pressing member 48, and there is no irrationality that the tape loading operation is hindered by being loaded by the pressing of the pressing member 48.

For this reason, it smoothly slides on the guide rail 10a formed in the thin three-dimensional curved surface, and moves to the tape adhesion completion position. Moreover, since it does not act on the pressing force of the pressing member 48 of the tape loading member 8 during movement, the ring gear 31 which drives the tape loading member 8, the gear which drives the ring gear 31, etc. The extra load does not act on the drive mechanism, the motor 45, and the like.

Again, when the ring gears 31 and 32 are rotated, the tape loading members 7 and 8 wind the magnetic tape 4 around the rotating drum 2 and at the same time contact the stoppers 29 and 30 to complete the tacking. Stop at position When the tape loading members 7 and 8 reach the tape-attached position as shown in FIG. 6, the engaging portion 32 of the ring gear 932 passes through the roller 48b of the pressing member 48. As shown in FIG. Therefore, the roller 48b wets the inclined portion 32a ₂ of the engaging portion 32a and is displaced in the inner circumferential direction of the ring gear 32.

For this reason, when the tape loading member 8 reaches the tape-attachment completion position, the pressing member 48 again rotates counterclockwise. Thus, the tape loading member 8 is pressed from the side by the pins 48a of the pressing member 48 to impart elasticity of the spring 50.

As shown in FIG. 2, the tape loading member 8 abuts against the stopper 30 in a state inclined at a predetermined angle to the inclined portion 10a ₃ (FIG. 4) of the guide rail 10a. Is locked.

In addition, the ring gears 31 and 32 are rotated at a slight angle even after the tape loading members 7 and 8 contact the stoppers 29 and 30 so that the stoppers 29 and 30 are prevented by the tension of the springs 37 and 41. Is pressurized. That is, as shown in FIG. 3, the tape loading member 8 contacts the upper end 26a of the loading pawl 26 with the V-shaped locking portion 30a and simultaneously protrudes downward from the traveling direction. The protruding portion 8d is inserted into the lower side of the protruding piece 51 fixed to the chassis 1 and stopped.

Further, the tape loading member 8 joined in the advancing direction by the tension force of the spring 41 presses the upper surface of the projecting portion 8d against the lower surface of the projecting piece 51 of the stopper 30 and is displaced in the direction of arrow E. FIG. Determine the position in the prevented state. 3 and 6, the rear side portion of the tape loading member 8 is pressed by the pin 48a of the pressing member 48, and the upper end 26a 'of the loading pawl 26 is pressed. ) Back to the state not inclined to the locking portion (30a). For this reason, even though the tape loading member 8 is stopped in the inclined state at a predetermined angle, the tape loading member 8 is positioned without inclination in the arrow E direction and the arrow F direction, and the magnetic tape passed through the rotating drum 2. Guide (4) stably.

In this way, the magnetic tape in the tape cassette 3 is taken out and guided to the loading holes 24 and 26 of the tape loading members 7 and 8 so that the outer periphery of the rotating drum 2 is driven to record / reproduce.

Further, when returning the tape loading members 7 and 8 to the unloading position after recording / reproducing, the motor 45 rotates in reverse and the ring gears 31 and 32 rotate in the opposite directions of the loading operation, respectively. For this reason, when the tape loading member 8 moves from the tape-attachment complete position, the engagement part 32a again abuts on the roller 48b, and the pressing member 48 is clockwise so that it may be spaced apart from the guide rail 10a. Rotate to Accordingly, the tape loading member 8 returns smoothly without interrupting the movement to the unloading position without touching the pressing member 48 as described above even during the unloading operation.

In this way, the pressing member 48 does not press apart when the tape loading member 8 is moving, and the tape loading member 8 is on the tape sticking completion which connects the magnetic tape 4 to the rotating drum 2. Only when it arrives, the loading pawl 26 of the tape loading member 8 is pressed against the locking portion 30a of the stopper 30.

As described above, the magnetic recording / reproducing apparatus of the present invention is such that the pressing member does not contact the tape loading member of the magnetic tape winding side when the tape loading member of the magnetic tape winding side passes near the pressing member. In order to displace, the magnetic tape supply side connects with the tape loading member to form an engaging portion in the rotating body, and the engaging portion engages with the pressing member to displace the pressing member in the avoiding direction. Therefore, by pressing the tape loading member in motion, the unloading operation or unloading operation of the tape loading member on the magnetic tape winding side can be prevented from being unreasonably inhibited by the pressing of the pressing member. A smooth tape loading operation can be performed by smoothly moving the loading member. In addition, since the load by the tape loading member on the magnetic tape winding side during movement does not work, it is noted that an extra load also acts on each member of the drive mechanism for driving the tape loading member on the magnetic tape supply side and the magnetic tape winding side. At the same time, the tape loading member on the magnetic tape winding side is reliably pressurized to the tape-attached position so that the positioning can be performed without bias. The magnetic tape driving the rotating drum stably guides stably to provide good recording / It can be played back.

Claims (1)

It is provided in the lower side of the rotary drum 2 up and down, and also rotates in a mutually opposite direction from the drive source 45 to the reduction mechanisms 42, 43, 44, 46 and the inversion mechanisms 34, 35. The angles with which the magnetic tape 4 is drawn out from the tape cassette 3 and attached to the outer circumference of the rotating drum 2 in response to the rotation of the bodies 31 and 32 and the respective rotating bodies 31 and 32. The tape loading member 7 on the magnetic tape supply side and the tape loading member on the magnetic tape winding side connected to the rotating bodies 31 and 32, and the respective tape loading members 7 and 8 at the magnetic tape tacking completion position are stopped ( 29, 30 having a pressing member 48 adapted to press the tape loading member 8 of the magnetic tape winding shaft to the stopper 30, among the respective tape loading members 7, 8; In the magnetic recording / reproducing apparatus, the tape loading member 8 on the magnetic tape winding side is pressurized. An engaging portion 32a is formed in the pivoting body 32 connected to the tape loading member 7 on the magnetic tape supply side so as not to contact the pressing member 48 when passing near the ash 48. And a engaging portion engaging with the pressing member (48) so as to displace the pressing member (48) in the avoiding direction.