WO1993014498A1

WO1993014498A1 - Tape loading mechanism

Info

Publication number: WO1993014498A1
Application number: PCT/JP1988/000206
Authority: WO
Inventors: Syousuke Oka
Original assignee: Syousuke Oka
Priority date: 1987-09-30
Filing date: 1988-02-26
Publication date: 1993-07-22
Also published as: JPS6456043U

Abstract

This invention relates to a tape loading mechanism of a magnetic recording/reproducing apparatus. In order to keep sufficient locating accuracy of a tape guide in both loading and unloading states, a tape guide arm (58) is moved in an interlocking manner with the rotation of rotary arms (41, 42) for moving a pair of guide post members (7, 8), the movement of this tape guide arm (58) is stopped by a check member (60) at a predetermined position of a magnetic tape travelling path and there is disposed a biasing member (54) for pressing the tape guide arm (58) to the check member (60). The invention is effective in that locating accuracy of a tape guide (17) mounted to the tape guide arm (58) can be kept on a high level. The invention can be used for a digital tape recorder and a VTR.

Description

Akira ism

Fine

Title of invention

Taping mechanism

Technical field

This invention, _Q relates Te Puro Di in g mechanism for running and along the magnetic tape to the head-de ram to the rotation of the magnetic recording and reproducing apparatus

Background art

Fig. 1 is a block diagram showing an example of a conventional tape-producing mechanism. In the figure, (1) is a chassis, (2) is a rotary head drum, and (3) is a system. A magnetic tape (4) is pulled out from a supply reel 24 by a tape cassette accommodated in the yaw 1 and is wound around a rotating head drum, and is taken up by a reel. ^ Is a guide rod provided in the tape cassette (3).

(5), (6) on both sides a pair of guide grooves formed on the sheet catcher over sheet (1), ⁽⁷⁾

( ⁸ ) is a pair of guide post members movably supported in the guide grooves (5) and ( ⁶ ), respectively, and ( ⁹ ) and ^ are the chassis (1). A guide tongue that is fixed to the mouth and receives the guide post members (7) and (8) in the mouthed state. , Is a capstan motor that rotates a capstan shaft ^. (^ Is the pinch arm, which is a support pin fixed upright to the chassis (1).

M is rotatably supported, and a pinch roller ^ is rotatably supported at the tip ο

The pinch roller arm (^ and its rotating means Shown in the figure. ^ Is a cam plate rotatably supported on a support shaft of a pinch roller ^, and a tape guide ^ is provided in the middle, and a spring member (not shown) is used in the figure. It is pressed in a counterclockwise direction, and in the figure, the tip abuts against a contact member 取付け attached to the chassis, and is received. When the pinch opening roller arm is turned counterclockwise, the cam 扳 ^ comes out of contact with the tip, and the stopper に ° (13a) provided on the pinch roller arm ^ is released. Will be accepted. Is a link plate movably supported in the A and B directions on support pins ^ which are fixed upright to the chassis (1). Both are moved via illustrations. ^ Is a slide plate movably supported on the link plate ^, which is pressed in the A direction by a tension spring ^ applied between the link plate 08) and has a long length. A hole (19a) is formed. An engaging pin fixed to the rear end of the pinch roller arm ^ is engaged with the elongated hole (19a), and the pinch roller arm ^ is moved to move the pinch roller. Rotate the ram.

The operation of the above conventional device is as follows. Attaching Tepuka set that accommodating the magnetic tape ⁽⁴⁾ to ⁽³⁾ to the sheet catcher over sheet (1). From this unloading state, the loading motor is rotated, and the guide members (7) and ( ⁸ ) are guided through movement transmitting means (both not shown). It is moved along the grooves ( ⁵ ) and (6) to enter the first loading state.

On the other hand, in the unloading state, the position in the B direction in FIG. The pinch roller arm is in the pivot position shown by the dashed line, and is received by the cam plate (^ is the stopper (13a)). By the rotation of the loading motor for one-loading, the link plate ^ is moved in the direction of the arrow A via the movement transmitting means (not shown). -The arm (^ is rotated clockwise to the position shown by the solid line), and the magnetic tape (does not touch the pinch roller $, the tape guide 7) The contacted first loading state is reached.

In the first loading state, the guide post members) and (8) are received and positioned by the guide stoppers ( ⁹ ) and ( ⁹ ), and the magnetic tape ( ⁴ ) is rotated. Although it is wound around the pad drum ( ² ) at a predetermined angle, the pinch roller (^ is not in contact with the magnetic tape ( ⁴ ) or the capstan shaft ^ The tape ( ⁴ ) is driven by the rotary drive of the take-up reel, that is, the magnetic tape ( ⁴ ) sent from the supply reel is guided by the guide bar. After passing through the stop member (8), the rotating head drum (2), and the guide post member (7), it is guided along the tape guide ^ and the guide rod ^. It is wound on a reel ^.

Further, when the loading motor is rotated, the link plate ^ is further moved in the direction A, and reaches the second loading state shown in FIGS. 1 and 2. In the process of moving the link plate ^, the cam plate ^ abuts against the contact member ^ and rotates clockwise, and the pinch rollers $ are captured via the magnetic tape ( ⁴ ). The abutment is applied to the shaft by a tension spring ^. The tape guide is fixed to the cam plate ^. In the second loading state, the position of the tape guide is between the vinch roller arm ^, the cam plate ^ and the contact member ^. It is determined by the engagement relationship.

As described above, when the second loading state of the loading is completed, the magnetic tape ( ⁴ ) is pressed by the capstan axis ^ and the pinch roller ^. The vehicle is driven by the rotation of the capstan motor Οί. Thus, the magnetic tape ( ⁴ ) passes through the guide post member (7), is guided along the tape guide W and the guide rod ^ via the capstan shaft ^, and is wound. It is wound on a reel.

In the conventional tape-propagating mechanism as described above, the position of the tape guide ω is determined by the engagement relationship between the link plate ^ and the pinch roller arm in the first loading state. In addition, the positional accuracy of the tape guide ^ was insufficient due to the position error of the link plate ^.

Further, even in the second loading state, the position of the tape guide is determined by the engagement relationship between the binch roller arm ^, the plate cam ^, and the contact member ¾. The position accuracy of the tape guide was insufficient. For this reason, there was a problem that the winding angle of the tape guide (17) was not constant, and it was difficult to obtain a stable tape running.

Also, between the tape guide ^ and the guide post member), (8) There are many parts that are engaged with, and it is difficult to obtain the dimensional relationship between them. For example, it is difficult to obtain the dimensional accuracy between the tape guide 7) in the unloading state shown by the dashed line in Fig. 3 and the guide post member), (S), and the tape cassette ( ³ ) When attaching to the chassis (1), is there a tape guide?)

There was a problem that it could not fit in the inner space (3a) of (3) and contacted the magnetic tape ( ⁴ ).

Disclosure of the invention

The tape-propagating mechanism according to the present invention moves the tape guide in conjunction with the rotation of the rotating arm for moving the pair of guide post members, while supporting the tape guide. The tape guide arm to be pivoted is pivoted at the pivot point of the chassis, and the tape guide arm is rotated in synchronization with the loading movement of the guide post member. An urging member that stops the movement of the tape guide arm at a predetermined position where the magnetic tape travels by a blocking member, and presses the tape guide arm against the blocking member. It is provided with.

According to the present invention, in both the first loading state and the second loading state, the tape guide is accurately maintained at a predetermined position, and the magnetic tape is wound around each guide member by a predetermined winding. Stable travel is obtained by contact at an angle, and since the tape guide is driven from the rotating arm, there are few intervening parts, so it is easy to obtain the relative dimensional relationship between the tape guide and the guide post member. Text in unloader status Tape cassette ゃ It is possible to prevent contact between the magnetic tape and the tape guide, which has the effect of providing a highly safe product.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a structural diagram showing an example of a conventional tape loading mechanism, FIG. ² is a plan view of a rotating means of a pinch roller arm in FIG. 1, and FIG. 3 is a plan view of the apparatus in FIG. FIG. 4 is a plan view showing a loading state, FIG. 4 is a plan view showing an unloading state of a tape opening / leading mechanism according to an embodiment of the present invention, FIG. FIG. 6 is a plan view showing the first and second loading states of the mechanism shown in FIG. 1, FIG. 7 is a detailed plan view of a main part of FIG. 4, and FIG. Fig. 5 is a detailed plan view of the main part of Fig. 5, Fig. 9 is an exploded perspective view of one of the rotating arm and the rotating means of the tape guy door in Fig. 4, and Fig. 10 is the locking lever of Fig. O in the exploded perspective view of the bar and cam gear

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 4 and FIG. 7 are a plan view and an enlarged plan view of a main part of an embodiment of the tape loading mechanism according to the present invention, showing an unloading state. In the figure, (1) to, ^, ^, 7), ^, and ^ are the same as those in the conventional apparatus described above. The rotation is transmitted from the pulley of the capstan motor Οί) to the flywheel (12a) of the capstan shaft via the belt ©. ^ Indicates the chassis (1 ) Is supported by the support pin 04 The pinch roller arm, which is currently supported, rotatably supports a pinch roller $ at the tip. ) Is a pinch arm (twist spring that is hung between the hooks (28a) and (28b) on both sides of ^ in the direction in which both legs expand), and W is a pinch armor. Tension spring that urges the arm ^ in the counterclockwise direction in the figure, and ^ is a locking lever that is rotatably supported by a support pin ^ that is fixed upright to the chassis (1). -, ^ Has a gear portion (not shown) on the outer circumference, a first cam groove ^ on the front surface, and a

2 A cam gear having a cam groove (65) formed thereon, which is rotatably supported by a support pin ^ which is fixed upright on the rear surface of the chassis (1).

The locking lever ^ and the gear gear ^ are shown in an exploded view in Fig. 1. An engaging pin ^ penetrates and is fixed to a tip end of the locking lever ^, and a lower portion (36a) of the pin is engaged with and guided by the first cam groove ^. When the locking lever is turned counterclockwise by this engagement guide, the pin upper portion (36b) locks one leg (29a) of the torsion bar.

Returning to Fig. 7, ^ and ^ are a pair of rotating gears rotatably supported on supporting pins 树 and ^, respectively, which are fixed upright on the rear side of the chassis (1). The rotating arm ^ and ぴ ^ are fixed. A link rotatably connects the rotating arm ^ to the guide post member ( ⁷ ), and a link rotatably connects the rotating arm ^ to the guide post member ( ⁸ ). It is a link. ^ Is a support fixed upright on the back side of the chassis (1). By means of the holding pin ^ and the supporting pins, ^, the slide plates movably supported in the A and B directions, © and ^ are attached to the slide plates ^ by A, B A pair of racks on both sides movably supported in the direction, meshing with the gears ® and ^, respectively. ^ And ^ are tension springs respectively hung between the racks ^ and ^ and the slide 扳 ^, and pull and urge the racks and ^ in the A direction. The rack ® attracted in this way is received by the stopper ^ which is fixed to the slide plate legs.

In (53), a tooth portion (53a) is formed concentrically with the shaft center.

The rotation transmitting body is rotatably supported on the rotation arm, and is rotated clockwise in the figure by an urging member ^, which is a tension spring force applied between the tip and the rotation arm ®. It is urged and received by the contact portion (41a) of the rotating arm and is maintained at this position.

Is a bracket fixed to the chassis, which rotatably supports the intermediate gear. As shown in FIG. 9, the intermediate gear (56) penetrates a hole (la) formed in the chassis (1), and has teeth on the upper and lower rain surfaces of the chassis (1). The portion is exposed to straddle and meshes with the tooth portion (53a) of the rotation transmitting body (53) below.

In FIGS. 7 and 9, reference numeral (58) denotes a tape guide arm rotatably supported by a support pin (57) fixed upright to the chassis (1), and a pinch roller is provided at a distal end thereof. Rotatably supported The toothed portion (58a) is formed on the outer periphery of the intermediate portion, and meshes with the intermediate gear (56) to be rotated.

In FIG. 7, reference numeral (60) denotes a blocking member fixed to the chassis (1), and the clockwise rotation of the tape guide arm (58) is a predetermined rotation of the pinch roller 7). The contact portion (58b) of the guide arm (58) abuts and stops so as to stop at the forward position.伝達 1) is a transmission arm, one end of which is rotatably supported on a support pin that is fixed upright on the back side of the chassis (1), and an engagement pin that is fixed near the tip. (64) is engaged and guided in the second cam groove の of the cam gear ^, and is rotated. A transmission pin (63) fixed to the end is formed by a length formed at one end of the slide plate. The slide plate ^ is engaged with the hole (45c) and is moved in the A and B directions.

Referring back to FIG. 4, 嗨 is a loading motor mounted on the chassis (1), and a reduction gear means (67) below the chassis (1) via a belt means. The rotation is transmitted to the cam gear via. (68) is a pair of guide rods on both sides fixed to the chassis (1).

Next, the operation of the apparatus of the above embodiment will be described. In Figs. 4 and 7, the tape cassette ( ³ ) is housed in the force chassis (1), and the magnetic tape ( ⁴ ) is in an unloading state. Guide post members (7) and (8), pinch rollers (1 $, tape guide ^) are all located in the space inside the tape cassette ( ³ ). The engaging pin (64) of the transmission arm (61) is located at the large radius portion of the second cam groove に対する with respect to the center of the shaft, and the slide plate ^ is shifted most in the Β direction. Therefore, the rack ^, The tape guide arm (58) is rotated most counterclockwise by the transmission action of the gear ^, the rotation transmitting member 呦, and the intermediate gear (56). In addition, the pinch roller arm ^ is biased by the tension spring ^ to rotate counterclockwise, and the tape guide arm (58) is abutted at the contact portion (28c). Therefore, the tape guide door (58) is constantly urged in a counterclockwise direction, and the backlash by the intermediate gears and the like is canceled.

Next, when the loading motor (66) is driven to rotate and the cam gear is rotated clockwise, the engaging pin (64) is guided along the second cam groove pottery, The clockwise rotation of the transmission arm (S1) causes the slide plate ^ to start moving in the A direction. The racks © and ^ are tension springs), and are moved in the direction A together with the slide plate ^ while being pressed against the stopper by ^. , Rotate the gear counterclockwise. As a result, the guidepost member (7) via the rotating arm ^ and the link plate ^ and the guideboth member (7) via the rotating arm ^ and the link plate ^ are provided. 8) are moved in direction C along guide grooves (5) and (6), respectively. In addition, since the rotation transmitting body (53) is pressed by the urging member ^ against the contact portion a of the rotation arm ©, the rotation transmission body (53) is integrated with the rotation arm in the clockwise direction. The tape gear door (58) is rotated clockwise via the intermediate gear (56). The vinyl roller arm ^ is in contact with the tape guide arm (58) at the contact part (28c) by the tension spring ^. In the moment given to the tape guide arm ( ⁵⁸ ) by W, the biasing member (54) also causes the tape guide arm ( ⁵⁸ ) to rotate. The pinch roller arm ¾ is not pushed by the tape guide arm (58) because one piece is set large enough: turn clockwise Will be done.

In the jar good of this, and Russia over de y in g electric motor (66) Ru continues to rotate, the hand over Puka cell Tsu door ⁽³⁾ the magnetic tape ⁽⁴⁾ in the guide post-members ( 7), (8) Pinch roller ^, tape guide 7) Pull out in the direction of mouth opening.

Furthermore, the rotation of the loading motor (66) causes the contact portion (58b) of the tape guide arm (58) to contact the blocking body (SO). At this time, the guide post members) and ( ⁸ ) have not yet contacted the guide stops ( ⁹ ) and 0, and the movement of the slide plate ^ in the direction A continues. ing. Here, the moment at the tooth wheel ^ by the tension spring ^) is set to be sufficiently larger than the moment at the gear by the urging member (54). Therefore, the tension spring does not extend, and the urging member (54) extends. Therefore, the guide post members (7) and ( ⁸ ) can be further moved in the C direction, so that the guide stoppers are provided. (9) The tension springs ^),) expand after contact with, and are pressed against the guide stopper (9), nan0 by these spring pressures. On the other hand, after the tape guide arm (2) comes into contact with the blocking body (60), the position is determined by the pressing force due to the extension of the urging member (54).

In this way, the guide post members (7) and (8) force S guide post (9) and ^, and the position of the tape guide 7) is determined by the blocking body (60), but the pinch roller ^ is still in contact with the cabinet shaft ^. No 1st loading state. This state is shown in FIGS. 5 and 8. In this state, the magnetic tape ( ⁴ ) is run by the winding reel ^. That is, in the first loading state, the magnetic tape ( ⁴ ) holds the rotating head drum (at a predetermined angle around the tape guide?) At the predetermined position. As a result, a high-speed cueing operation can be performed by rotation of the take-up reel, and the loading motor (66) rotates, and the cam gear continues clockwise. When the pivot pin rotates in the right direction, the engaging pin ^ is guided by the concentric part of the small radius part of the second force groove pot, the surface movement of the transmission arm ぉ 1) stops, and the slide plate ^ moves. Stops. On the other hand, the pin lower part (36a) engaged with the first cam groove is guided from the concentric groove part of the large radius part along the embossed groove part, and the locking lever 1 ^ is inverted. It is rotated clockwise. As a result, the pin upper portion (36b) abuts the bent portion of one leg (29a) of the twist spring ^ from outside. This torsion spring force; the pressing force applied to the hooks (28a) and (28b) of the pinch roller arm ^ is sufficiently larger than the moment by the tension spring. When the pin upper part (36b) comes into contact with the twist spring ^, the pinch roller arm © is turned clockwise in a state where it is integrated with the twist ^. Let As a result, the vinyl roller is captured via the magnetic tape ( ⁴ ). The twist spring ® pressed against the upper pin (36b) of the twist spring ® is in contact with the stand shaft ^ and the rotation of the locking lever ^ is continued, so that the angle between both legs is reduced. It is deformed and a gap is created between one leg (29a) and the hook (28b), and the pinch roller $ is carried by the pressing force of this twist spring. Press against the push shaft 軸 with the specified pressing force. In this way, the second loading state shown in FIG. 6 is obtained.

In this second loading state, the rotation of the capstan motor (U) rotates the capstan shaft (^), and the magnetic tape (4) travels to rotate. Recording and playback operation.

In the above embodiment, the slide plate ^ is moved to rotate the pair of guide post members) and (S) to rotate the rotating arms ^ and ^. H, and the rotating gear ®,

The slide plate © was moved by the linear motion conversion means using the cam gear ^ and the transmission arm ぉ 1) to drive the motor. For example, the sector gear is rotated by a cam gear, and the rotation arms ^, ^ are rotated by the pair of rotation gears directly or via an intermediate gear, and the sector gear is further rotated. The tape guide arm (58) may be rotated through the intermediate gear to the sector gear, so that the operation of the guide post member and the operation of the tape guide may be synchronized.

Further, in the above embodiment, the tape guide arm is driven by the biasing force of the tension spring 0) applied to the pinch roller arm ^. And apply counterclockwise torque to the backlash between the teeth (53a) of the rotation transmission body 653), the intermediate gear, and the teeth (58a) of the tape guide arm legs. It absorbs and improves the position accuracy of the tape guide α in the unloading state shown in Fig. 4 and Fig. 7, but the biasing body is directly engaged with the tape guide door. Thus, even if a torque in the counterclockwise direction in the drawing is given, the same effect as in the above embodiment can be obtained.

Industrial availability

The present invention is applied to a device for pulling out a magnetic tape stored in a tape cassette, such as a digital tape recorder or a VTR, and recording and reproducing the same.

Claims

The scope of the claims

1. A pair of guide post members are moved forward along a pair of guide grooves provided on both sides of the chassis to draw out the magnetic tape from the cassette, and a predetermined amount is inserted into the rotating head drum. In the tape loading mechanism, which loads over the angle and unloads the magnetic tape by retreating the pair of guide post members, the pair of bosses may be used. And a pair of rotating arms for moving the arm members along the guide grooves, respectively, and a rotational motion conversion transmission for rotating the pair of rotating arms by rotation of the loading motor. Means, which are rotated by the rotary motion conversion transmitting means, and in synchronization with the movement of the guide guide members, the tape guide is moved to stretch the magnetic tape in the loading direction. Tape guide door, above chassis A blocking body that is fixed and receives the rotation of the tape guide arm at a predetermined position in the loading of the tape guide, and a biasing member that presses the tape guide arm that has stopped rotating against the blocking body. Equipped tape loading mechanism.

2. The tape guide arm is supported at a pivot point provided on the chassis, and the teeth formed on the tape guide arm and the pivot arm are connected to each other. 2. The tape loading mechanism according to claim 1, wherein the engagement causes the tape guide arm to move in synchronization with the movement of the rotating arm. 3. The urging member is urged between the turning arm and a turning transmission member having teeth formed thereon. 2. The tape loading mechanism according to claim 1, wherein the tape guide arm is moved in synchronization with the movement of the rotation arm by engaging with a tooth formed on the tape guide door arm.