JP3066351U - Magnetic tape device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To quickly shift from loading and unloading of a magnetic tape to the next mode,
To reduce costs and reduce size. SOLUTION: A clutch body 42 is interposed between loading arms 8a and 8b and a driving side rotating body 48,
At the time of loading and unloading, the clutch body 42 is connected to the loading arms 8a and 8b and the driving-side rotating body 48, and the driving-side rotating body 48 is rotated forward and reverse to pull out or pull back the magnetic tape in the tape cassette. When the loading arms 8a and 8b reach the loading position and the unloading position in the magnetic tape device as described above, the loading pushing means 45 for pushing the clutch body 42 away from the driving-side rotating body 48 and the unloading means 45 are provided. A loading pushing means 46 is provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a magnetic tape device for recording, reproducing, or erasing data on a magnetic tape, and more particularly, to a method capable of quickly moving from loading and unloading of a magnetic tape to the next mode.

[0002]

[Prior art]

 Conventionally, there is a magnetic tape device of this type described in Japanese Utility Model Laid-Open Publication No. 3-28540. One example is described below. As shown in FIGS. 8 and 9, a head cylinder 2 is sandwiched between a chassis 1 and a chassis. A pair of left and right long holes 3a, 3b are formed, and a pair of movable tables 4a, 4b movable in the front-rear directions a, b along the respective long holes 3a, 3b, and on the movable tables 4a, 4b, respectively. An upright movable guide post 5a, 5b and a loading mechanism 6 for loading and unloading the magnetic tape t by moving the movable tables 4a, 4b forward and backward a, b are provided.

The loading mechanism 6 includes a pair of sector gears 7 a and 7 b pivotally attached to the rear surface of the chassis 1 and meshing with each other, loading arms 8 a and 8 b formed integrally with the respective gears 7 a and 7 b, It has connecting links 9a and 9b for connecting the loading arms 8a and 8b to the moving tables 4a and 4b.

As shown in FIG. 9, a rack 11 a provided at one end of a loading lever 11 is engaged with a pinion 10 integrally formed with one gear 7 a, and a pin protruding from the other end of the loading lever 11 is provided. 11b is fitted into a cam groove 12a of a rotating cam 12 rotatably provided on the chassis 1, and as shown in FIG. 8, a worm gear 14 meshes with a gear portion 13 formed on the outer peripheral surface of the rotating cam 12, and the worm gear 14 is linked to a cam motor 16 via a power transmission mechanism 15.

In the configuration described above, when loading the magnetic tape t, the rotating cam 12 is rotated by the cam motor 16 from the state shown in FIGS. 8 and 9 to pull the loading lever 11 toward the rotating cam 12, and 10 and 11, the magnetic tape t is pulled out of the tape cassette T by the movable guide posts 5a and 5b and wound around the head cylinder 2 as shown in FIGS. Has become.

Further, when the magnetic tape t is unloaded, the rotation cam 12 is rotated in the reverse direction by the cam motor 16, so that the operation reverse to the above is performed and the magnetic tape t is returned to the tape cassette T. .

In FIG. 8, reference numerals 18 and 19 denote a supply reel stand and a take-up reel stand for fitting the tape cassette T, 20 denotes a full-width erasing head, 21 denotes a sound erasing head, 22 denotes a sound / control head, and 23 Is a fixed tape guide post, 24 is a capstan motor that rotates the capstan 25, and 26 is a pinch roller that presses against the capstan 25 via the magnetic tape t.

Reference numeral 27 denotes a mode switching lever that can move in the left and right directions d and e. Reference numeral 28 denotes a swing lever that can swing around a pivot shaft 29. A pin 31 protruding from the other end is connected to the end of the mode switching lever 27, and swings by rotating the rotary cam 12 forward and reverse. The mode switching lever 27 is moved in the left and right directions d and e via the lever 28 to switch to a mode such as reproduction.

Reference numeral 33 denotes a tension post that is interlocked with the mode switching lever 27 and applies tension to the magnetic tape t during loading (see FIG. 10).

Reference numeral 34 denotes an idler mechanism provided between the supply reel table 18 and the take-up reel table 19, and has an idler gear 35 pivotally supported by a swing arm 37 that swings about a support shaft 36. The idler gear 35 is meshed with an intermediate gear 38 rotatably fitted to the support shaft 36 and is interlocked with the capstan motor 24 via pulleys 39 and 40 and a belt 41. By driving the belt 41 in the direction of arrow f by the capstan motor 24, the idler gear 35 meshes with the gear 18a of the supply reel base 18 (see the solid line in FIG. 10), and the magnetic tape t is wound around the supply reel base 18. The belt 41 is returned, and the idler gear 35 is engaged with the teeth 19a of the take-up reel base 19 by running the belt 41 in the direction opposite to the arrow f (see the phantom line in FIG. 10). The magnetic tape t is wound around the take-up reel base 19.

[0011]

[Problems to be solved by the invention]

 In the above-described conventional configuration, it takes a relatively long time to move from loading and unloading of the magnetic tape t to the next mode, resulting in a large loss time. In addition, during loading, the two moving tables 4a are moved by the cam motor 16 via the loading mechanism 6. , 4b are moved, and a large driving force is required to move the two moving tables 4a, 4b. Therefore, a large cam motor 16 is used, which increases the cost. . Further, the large moving stroke of the loading lever 11 is an obstacle to downsizing the magnetic tape device.

The present invention has been made in view of the above-mentioned conventional drawbacks, and has been made in view of the above drawbacks. Thus, a magnetic tape capable of quickly moving from loading and unloading of a magnetic tape to the next mode, and achieving cost reduction and miniaturization. An apparatus is provided.

[0013]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 includes a clutch body interposed between the loading arm and the driving-side rotating body, and connects the clutch body to the loading arm and the driving-side rotating body during loading. A magnetic tape device configured to rotate the loading arm through a clutch body to pull out a magnetic tape in a tape cassette by rotating the driving-side rotating body in a normal direction, wherein the loading arm is used for loading. A loading pushing means for pushing the clutch body in a direction away from the driving-side rotating body when the clutch body reaches the position is provided.

According to the above configuration, when the loading arm reaches the loading position, the clutch is pushed out by the loading pushing means in a direction to separate the clutch body from the driving-side rotating body. It is possible to move quickly from loading to the next mode to reduce the loss time.

According to a second aspect of the present invention, in the first aspect of the present invention, the loading push-out means includes an elastic projection provided on one of the clutch body and the loading arm so as to be elastically displaceable. And an engaging portion provided on the other side, and when the loading arm reaches the loading position, the engaging portion climbs over the elastic protrusion to move the clutch body away from the drive side rotating body. It is characterized by being extruded.

[0016] According to the above configuration, when the loading arm reaches the loading position, the clutch body is securely separated from the drive-side rotating body by utilizing the elastic force generated by the engaging portion getting over the elastic protrusion. Can be done.

According to a third aspect of the present invention, in the second aspect of the present invention, the elastic projection has an elastically deformable elastic piece left uncut by forming a slit in the clutch body; The elastic piece is elastically deformed by pressing an engaging portion provided on the loading arm against the convex portion, the convex portion being formed integrally with the piece, so that the engaging portion gets over the convex portion. It is characterized by.

According to the above configuration, since the elastic projection is formed integrally with the clutch body, the number of parts does not increase and the manufacturing cost can be reduced.

According to a fourth aspect of the present invention, a clutch body is interposed between the loading arm and the driving-side rotating body, and the clutch body is connected to the loading arm and the driving-side rotating body during unloading. When the loading arm reaches the unloading position in a magnetic tape device in which the loading arm is rotated via the clutch body by reversing the side rotator to pull the magnetic tape back into the tape cassette. Further, an unloading pushing means for pushing the clutch body in a direction away from the driving-side rotating body is provided.

According to the above configuration, when the loading arm reaches the unloading position, the clutch body is pushed out by the unloading pushing means in a direction to separate the clutch body from the drive-side rotating body. It is possible to move quickly from unloading to the next mode and reduce the loss time.

According to a fifth aspect of the present invention, in the device of the fourth aspect, the unloading pushing means includes an elastic piece elastically deformable provided on one of the clutch body and the loading arm, When the loading arm reaches the unloading position, the elastic piece is pressed against the engaging portion and elastically deformed, and the clutch body is elastically deformed by the elastic force. It is characterized in that it is pushed out in a direction away from the driving side rotating body.

According to the above configuration, when the loading arm reaches the unloading position, the clutch body is reliably moved from the drive side rotating body by utilizing the elastic force generated by the elastic piece being pressed against the engaging portion. Can be separated.

According to a sixth aspect of the present invention, in the device according to the fifth aspect, the elastic piece is formed in a substantially L-shape, and a base end of the elastic piece is integrally provided with the loading arm. The elastic piece is elastically deformed by pressing the tip of the piece against the engaging portion.

According to the above configuration, since the elastic piece is formed integrally with the loading arm, the number of parts does not increase, and the manufacturing cost can be reduced.

The invention according to claim 7 is characterized in that, in the invention according to any one of claims 1 to 6, the driving-side rotating body is linked to a capstan motor.

According to the above configuration, since the driving force of the loading arm is given by the capstan motor, a large load is not applied to the cam motor at the time of loading unlike the related art, and the cam motor can be downsized. At the same time, since the conventional loading lever is not required, the cost can be significantly reduced.

[0027]

[Embodiment of the invention]

 1 to 5 show a magnetic tape device according to an embodiment of the present invention. FIGS. 1 and 2 show an unloaded state of a magnetic tape t, and FIGS. 3 and 4 show a magnetic tape t. 5 shows a state before the tape cassette T is set on the chassis 1. FIG. 5 shows an interlocking mechanism 43 with a clutch body 42 for interlocking the capstan motor 24 and the loading mechanism 6. A clutch switching mechanism 44 for switching the clutch body 42 on and off is provided to push the clutch body 42 in the off direction when the loading arms 8a and 8b reach the loading position (see FIG. 3). A loading pushing means 45 is provided, and when the loading arms 8a and 8b reach the unloading position (see FIG. 1), the clamping means is closed. Unloading extrusion means 46 for extruding a switch 42 in the OFF direction. Since the configuration other than the above is substantially the same as the conventional example shown in FIGS. 8 to 11, the same portions are denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 2, the interlocking mechanism 43 includes a driving-side rotator 48 interlockingly connected to a pulley 39 that is rotated and driven by the capstan motor 24 via gear mechanisms 47a to 47d. Among the two sector gears 7a and 7b interlockingly connected to the moving tables 4a and 4b, a driven-side rotating body 49 is integrally and concentrically connected to one of the sector gears 7b. The drive-side rotator 48 is gear-shaped, and has teeth 48a all around. The driven-side rotating body 49 has a fan shape, and has a tooth portion 49a having a predetermined angle (about 90 degrees in this embodiment) and a predetermined angle (about 45 degrees in this embodiment) on its outer peripheral surface. °) is continuously formed with the arc surface 49b.

As shown in FIG. 2, the clutch body 42 is rotatably mounted on a support shaft 50 protruding from the chassis 1 between the drive-side rotator 48 and the driven-side rotator 49. A large-diameter fan portion 51 and a small-diameter fan portion 52 are arranged approximately in point symmetry about the axis 50 and are integrally formed with each other. A tooth portion 51a having an angle (about 135 ° in this embodiment) and an arc surface 51b having a predetermined angle (about 45 ° in this embodiment) are continuously formed. Further, on the outer peripheral surface of the small-diameter fan portion 52 facing the driven-side rotating body 49, a tooth portion 52a and an arc surface 52b are continuously formed at a predetermined angle (about 90 ° in this embodiment). .

As shown in FIG. 5, the clutch switching mechanism 44 has a mode switching lever 55 capable of reciprocating movement, a projection 55a protruding at one end thereof, and a rack 55b at the other end. A loading engagement piece 51c and an unloading engagement piece 51d are formed at both ends of the rear surface of the large-diameter fan section 51 so as to face the projection 55a, and face the rack 55b. A tooth portion 56a and an arc surface 56b are continuously formed at a predetermined angle (about 180 ° in this embodiment) on an outer peripheral edge of a circular cam 56 concentrically arranged on the rotating cam 12. A pair of cam pins 57 protruding from the circular cam 56 are movably fitted into an arc-shaped long hole 58 penetrating the circular cam 56, and the circular cam 56 is configured to be reciprocally rotatable by a play gap α. . Incidentally, reference numeral 59 denotes a mode switch interlocked with the rotary cam 12.

The loading operation will be described with reference to the above configuration. In a state where the tape cassette T is not set on the chassis 1, as shown in FIG. The tape cassette T is set at a predetermined position on the chassis 1 from this state, and the cam motor 16 is driven based on a detection signal for detecting the tape cassette T to move the rotary cam 12 to the arrow g. 2, the one end of the tooth portion 56a of the circular cam 56 is engaged with the rack 55b of the mode switching lever 55, thereby causing the mode switching lever 55 to move rightward. h, the projection 55a is pressed against the loading engagement piece 51c, the clutch body 42 is rotated in the direction of the arrow j, and the teeth 51a of the large-diameter fan section 51 are rotated on the drive side. The toothed portion 48a of the rolling member 48 is meshed with the toothed portion 52a of the small-diameter fan portion 52 and the toothed portion 49a of the driven-side rotator 49, so that the clutch body 42 is turned on.

Subsequently, the driving of the cam motor 16 is stopped based on the detection signal of the mode switch 59, and the capstan motor 24 is driven, so that the driving-side rotating body is driven via the gear mechanisms 47a to 47d. 48, the clutch body 42 is rotated in the direction of arrow j. As a result, as shown in FIGS. 1 and 2, the driven-side rotating body 49 is also driven, and the two moving tables 4a and 4b are advanced a through the sector gears 7a and 7b and the loading arms 8a and 8b. When the magnetic tape t is pulled out from the cassette T and the magnetic tape t is wound around the head cylinder 2 (see FIG. 3), the loading of the magnetic tape t is completed.

When the clutch body 42 is turned on as described above, the clutch body 42 does not move, so that the rotating cam 12 is rotated by the play gap α, and the impact caused by the driving of the cam motor 16 is reduced. Absorb.

Upon completion of the loading, as shown in FIG. 4, the arc surface 52 b of the small-diameter fan portion 52 comes into contact with the arc surface 49 b of the driven-side rotator 49, and the teeth 51 a of the large-diameter fan portion 51. Is separated from the drive side rotating body 48, the clutch body 42 is turned off, and the state in which the magnetic tape t is wound around the head cylinder 2 is maintained.

Next, the driving of the capstan motor 24 is stopped based on the detection signal of the mode switch 59. Subsequently, by driving the cam motor 16 and moving the mode switching lever 55 in the left and right directions h and i to switch the mode, the next operation such as reproduction is performed.

The unloading operation of the magnetic tape t will be described. From the state shown in FIGS. 3 and 4, by driving the cam motor 16 to rotate the rotary cam 12 in the direction opposite to the arrow g, the mode switching lever 55 is moved to the left. By moving in the direction i, the projection 55a is pressed against the unloading engagement piece 51d, and the teeth 51a of the large-diameter fan 51 mesh with the teeth 48a of the driving-side rotating body 48. Next, the clutch body 42 is rotated in the direction of arrow k by reversing the drive-side rotator 48. Thereafter, the unloading operation is performed in the reverse order of the above-described loading operation, and the magnetic tape t is pulled back into the tape cassette T.

According to the above configuration, the capstan motor 24 is used in place of the conventional cam motor 16 as a driving means for moving the movable tables 4a and 4b during loading, and a large load is not applied to the cam motor 16 during loading. Therefore, the cam motor 16 can be downsized, and the conventional loading lever 11 (see FIG. 11) is not required, so that the cost can be greatly reduced.

Further, the moving stroke of the mode switching lever 55 is smaller than that of the conventional loading lever 11, and the magnetic tape device can be downsized by the smaller amount.

As shown in FIG. 6, the loading pushing means 45 includes an elastic projection 61 provided at an end of the large-diameter fan 51 constituting the synthetic resin clutch body 42 on the tooth 51 a side. The elastic projection 61 includes a pin-shaped engaging portion 62 provided on the loading arm 8a. The elastic projection 61 is formed by forming a slit 63 in the large-diameter fan portion 51 and is left uncut. And a projection 61b integrally formed with the elastic piece 61a.

In the above configuration, when the drive-side rotating body 48 is rotated forward to rotate the clutch body 42 in the direction of the arrow j, and the loading arms 8a and 8b approach the loading position, as shown in FIG. 6A. Thus, the protrusion 61b is brought into contact with the engaging portion 62, and the engaging portion 62 rides on the protrusion 61b to elastically deform the elastic piece 61a (see FIG. 6B). When the portion 62 gets over the convex portion 61b, the clutch body 42 is pushed out in the direction j separating from the driving side rotating body 48, and the meshing state between the clutch body 42 and the driving side rotating body 48 is eliminated at a stroke. (See FIG. 6C).

In this case, when the loading arms 8a and 8b reach the loading position, the clutch body 42 can be reliably separated from the drive side rotating body 48 by utilizing the elastic force of the elastic projection 61. As a result, it is possible to quickly shift from the loading of the magnetic tape t to the next mode and reduce the loss time. Further, since the elastic projection 61 is formed integrally with the clutch body 42, the number of parts does not increase, and the manufacturing cost can be reduced.

In the above-described embodiment, the elastic protrusion 61 is provided on the clutch body 42 and the pin-shaped engaging part 62 is provided on one of the loading arms 8a. On the contrary, the pin is provided on the clutch body 42. The elastic engaging portion 62 may be provided and the elastic protruding portion 61 may be provided on one loading arm 8a.

As shown in FIG. 7, the unloading pushing means 46 includes a substantially L-shaped elastic piece 65 protruding from one of the synthetic resin loading arms 8 a, and a pin-shaped protruding from the clutch body 42. An engaging portion 66 is provided.

In the above configuration, when the driving-side rotating body 48 is rotated in the reverse direction to rotate the clutch body 42 in the direction of arrow k, and the loading arms 8a and 8b approach the unloading position, FIG. As shown, the tip of the elastic piece 65 is brought into contact with the engaging portion 66, and the tip of the elastic piece 65 is pressed against the engaging portion 66 and elastically deformed (see FIG. 7 (b)). The clutch body 42 is pushed out in the direction k away from the drive-side rotator 48 by the elastic force of, and the meshing state between the clutch body 42 and the drive-side rotator 48 is eliminated at once (see FIG. 7C). ].

In this case, when the loading arms 8 a and 8 b reach the unloading position, the elastic piece 65 is elastically deformed, and the clutch body 42 is securely moved from the drive-side rotating body 48 by utilizing the elastic force of the elastic deformation. This makes it possible to move quickly from the loading of the magnetic tape t to the next mode and to reduce the loss time. Further, since the elastic piece 65 is formed integrally with one of the loading arms 8a, the number of parts does not increase and the manufacturing cost can be reduced.

In the above-described embodiment, the elastic piece 65 is provided on the one loading arm 8a, and the engaging portion 66 is provided on the clutch body 42. Conversely, the engaging portion 66 is provided on the one loading arm 8a, 8b. In addition to providing the portion 66, the clutch body 42 may be provided with an elastic piece 65.

[0047]

[Effect of the invention]

 According to the first aspect of the present invention, when the loading arm reaches the loading position, the clutch body is pushed out by the loading pushing means in a direction to separate the clutch body from the drive-side rotating body. The loss time can be reduced by quickly moving from loading to the next mode.

According to the invention of claim 2, when the loading arm reaches the loading position, the clutch body is driven by the driving-side rotating body by utilizing the elastic force generated by the engaging portion getting over the elastic projection. Can be surely separated from the object.

According to the third aspect of the present invention, since the elastic projection is formed integrally with the clutch body, the number of parts does not increase and the manufacturing cost can be reduced.

According to the present invention, when the loading arm reaches the unloading position, the clutch body is pushed out by the unloading pushing means in a direction to separate the clutch body from the driving-side rotating body. In addition, the loss time can be reduced by quickly moving from the unloading of the magnetic tape to the next mode.

According to the invention of claim 5, when the loading arm reaches the unloading position, the clutch body is driven by the elastic member generated by pressing the elastic piece against the engagement portion. Can be surely separated from the object.

According to the invention of claim 6, since the elastic piece is formed integrally with the loading arm, the number of parts does not increase and the manufacturing cost can be reduced.

According to the invention of claim 7, since the driving force of the loading arm is given by the capstan motor, a large load is not applied to the cam motor at the time of loading unlike the related art, and the cam motor is downsized. In addition to the above, the conventional loading lever is not required, so that the cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a magnetic tape device according to an embodiment of the present invention in an unloaded state.

FIG. 2 is a schematic horizontal sectional view in the unloading state.

FIG. 3 is a schematic plan view of the loading state.

FIG. 4 is a schematic horizontal sectional view of the loading state.

FIG. 5 is a schematic horizontal sectional view showing a state before the tape cassette is set.

FIGS. 6 (a) to 6 (c) are plan views of main parts for explaining the operation of a loading extrusion means.

FIGS. 7 (a) to 7 (c) are plan views of main parts for explaining the operation of the unloading pushing means.

FIG. 8 is a schematic plan view of a conventional example in an unloaded state.

FIG. 9 is a schematic horizontal sectional view in the unloading state.

FIG. 10 is a schematic plan view of the loading state.

FIG. 11 is a schematic horizontal sectional view of the loading state.

[Explanation of symbols]

 8a, 8b Loading arm 24 Capstan motor 42 Clutch body 45 Loading push-out means 46 Unloading push-out means 48 Drive-side rotating body 61 Elastic projection 61a Elastic piece 61b Convex part 62 Engaging part 63 Slit 65 Elastic piece 66 Engagement Part T Tape cassette t Magnetic tape

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazumasa Nasu 7-7-1 Nakagakiuchi, Daito-shi, Osaka Funai Electric Co., Ltd.

Claims (7)

[Utility model registration claims] 1. A clutch body is interposed between a loading arm and a driving-side rotating body.
The clutch body is connected to the loading arm and the driving-side rotating body, and by rotating the driving-side rotating body forward, the loading arm is rotated via the clutch body to pull out the magnetic tape in the tape cassette. A magnetic tape device, comprising: a loading tape pushing means for pushing a clutch body in a direction away from a driving-side rotating body when the loading arm reaches a loading position. apparatus. 2. The loading arm according to claim 1, wherein the loading pushing means comprises an elastic protrusion provided on one of the clutch body and the loading arm so as to be elastically displaceable, and an engaging portion provided on the other of the clutch body and the loading arm. 2. The clutch according to claim 1, wherein when the clutch reaches the loading position, the engagement portion gets over the elastic projection to push the clutch body in a direction away from the driving-side rotating body. Magnetic tape device. 3. The elastic projection includes an elastic piece which is left uncut by forming a slit in the clutch body and is elastically deformable, and a projection integrally formed with the elastic piece.
3. The magnetic tape according to claim 2, wherein the elastic piece is elastically deformed by pressing an engaging portion provided on the loading arm against the convex portion so that the engaging portion gets over the convex portion. apparatus. 4. A clutch body is interposed between the loading arm and the driving-side rotating body, and when unloading, the clutch body is connected to the loading arm and the driving-side rotating body, and the driving-side rotating body is reversed. With this configuration, in the magnetic tape device in which the loading arm is rotated through the clutch body to pull the magnetic tape back into the tape cassette, when the loading arm reaches the unloading position, the clutch body is rotated on the drive side. A magnetic tape device provided with an unloading pushing means for pushing out in a direction away from a body. 5. The loading arm, wherein the unloading pushing means comprises an elastic piece provided on one of the clutch body and the loading arm so as to be elastically deformable, and an engaging portion provided on the other. When the clutch reaches the unloading position, the elastic piece is pressed against the engaging portion to be elastically deformed, and the clutch body is pushed out in a direction away from the driving side rotating body by elastic force due to the elastic deformation. 5. The magnetic tape device according to claim 4, wherein: 6. The elastic piece is formed in a substantially L-shape, and a base end thereof is integrally protruded from the loading arm, and the elastic piece is pressed by pressing a distal end of the elastic piece against an engaging portion. 6. The magnetic tape device according to claim 5, wherein the piece is elastically deformed. 7. The drive-side rotator is linked to a capstan motor in an interlocked manner.
The magnetic tape device according to any one of the above.