JP2004303402A - Magnetic recording/reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic recording/reproducing apparatus that has a small number of tape guide members and can increase the amount of torsion in a magnetic tape. <P>SOLUTION: When a second chassis means is at a predetermined position, a supply reel, first, second, and third tape guide members, and a cylinder are aligned in this order so that only the first, second, and third tape guide members guide the magnetic tape between the supply reel and the cylinder. The first tape guide member comes into contact with a magnetic surface; the second one come into contact with a non-magnetic surface; and the third one comes into contact with the non-magnetic surface. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a magnetic recording / reproducing apparatus capable of recording information on a magnetic tape and / or reproducing information from the magnetic tape.

  FIG. 7 shows a conventional magnetic recording / reproducing device 700 disclosed in Japanese Patent Application Laid-Open No. 11-273194.

  The magnetic recording / reproducing device 700 includes a main chassis 708 and a sub-chassis 703 slidable with respect to the main chassis 708. The subchassis 703 is configured so that a cassette 702 storing a magnetic tape 701 can be mounted.

  The magnetic recording / reproducing device 700 further includes a cylinder 738, an S reel base 704, a T reel base 705, and a capstan 750. The cylinder 738, the S reel base 704, the T reel base 705, and the capstan 750 are provided on the main chassis 708.

  The magnetic recording / reproducing device 700 further includes a plurality of tape guide members. The plurality of tape guide members guide the magnetic tape 701. The plurality of tape guide members are a tension post 714, an S3 post 749, an S2 post 744, an S1 post 745, a T1 post 746, a T2 post 747, a T3 post 751, and a T4 post 730. The tension post 714 is provided, for example, to provide appropriate tension to the magnetic tape 701 and to pull out the magnetic tape 701 from the cassette 702. Therefore, the tension post 714 receives a large pressure from the magnetic tape 701.

  When the sub-chassis 703 moves with respect to the main chassis 708 and at least one of the plurality of tape guide members moves with respect to the main chassis 708, the magnetic tape 701 is pulled out of the cassette 702. Further, a plurality of tape guide members guide the magnetic tape 701, and the magnetic tape 701 is wound around the cylinder 738, thereby forming a PLAY mode tape traveling path. The tape running path in the PLAY mode is a tape running path capable of recording information on the magnetic tape 701, reproducing information from the magnetic tape 701, and fast-forwarding the magnetic tape 701.

  Hereinafter, details of the tape running path in the PLAY mode will be described.

  The magnetic tape 701 is supplied from a supply reel (not shown) included in the cassette 702. The magnetic tape 701 supplied from the supply reel is sequentially wound around a tension post 714, an S3 post 749, an S2 post 744, and an S1 post 745 provided on the main chassis 708.

  Further, the magnetic tape 701 is wound around the cylinder 738 at a predetermined winding angle and a predetermined inclination angle in accordance with the standard for the tape recording pattern. The magnetic tape 701 is further wound sequentially around the T1 post 746, the T2 post 747, and the T3 post 751.

Further, the magnetic tape 701 is sequentially wound around the capstan 750 and the T4 post 730, and then wound around a take-up reel (not shown) included in the cassette 702.
JP-A-11-273194

  However, when the PLAY mode tape running path is formed, the tension post 714, the S3 post 749, the S2 post 744, and the S1 post 745 guide the magnetic tape 701 between the supply reel and the cylinder 738.

  Since the magnetic tape 701 is guided by many tape guide members as described above, the contact between the magnetic tape 701 and these tape guide members increases, and the friction between the magnetic tape 701 and these tape guide members increases. Therefore, the tape tension during running of the magnetic tape increases. As a result, the magnetic tape 701 is easily damaged when the tape runs.

  Further, since the magnetic tape 701 is guided by many tape guide members in this manner, the distance between these tape guide members is reduced. Therefore, in the magnetic recording / reproducing apparatus of the so-called torsion tape traveling path, the amount of twist of the magnetic tape 701 cannot be increased. As a result, the degree of freedom in designing the tape running path is hindered.

  Since the magnetic tape 701 is guided by many tape guide members in this manner, the distance between these tape guide members is reduced. Therefore, variations in the inclination accuracy and position accuracy of each tape guide member greatly affect the running stability of the tape. As a result, the inclination accuracy and the position accuracy of each tape guide member must be realized with high accuracy, which hinders simplification of the device, miniaturization of the device, and cost reduction of parts.

  Further, when the magnetic recording / reproducing apparatus includes a main chassis and a sub-chassis configured to be slidable with respect to the main chassis, the space for arranging the tape guide member is very small. A configuration requiring a large number of tape guide members is not desired.

  Furthermore, since the magnetic tape 701 supplied from the supply reel is wound around the tension post 714 without passing through another tape guide member, the position of the tension post 714 is not stable. This tendency is significant because the tension post 714 is movable with respect to the chassis means. Therefore, the running stability of the magnetic tape 701 is significantly reduced.

  The present invention has been made in view of the above problems, and it is possible to reduce the number of tape guide members required between a supply reel and a cylinder, and to increase the distance between these tape guide members. It is an object of the present invention to provide a magnetic recording / reproducing device capable of increasing the amount of twist of a tape.

  A magnetic recording / reproducing apparatus according to the present invention includes a cylinder for recording information on a magnetic tape having a magnetic surface and a non-magnetic surface and / or reproducing information from the magnetic tape, and a first cylinder provided with the cylinder. A chassis means, a second chassis means movably configured with respect to the first chassis means, and a second chassis means configured to mount a cassette including a supply reel for supplying the magnetic tape; At least three tape guide members including a first tape guide member, a second tape guide member, and a third tape guide member, wherein the second chassis means moves between a first position and a second position. The first position is a position where information can be recorded on the magnetic tape and / or the information can be reproduced from the magnetic tape, and the second position is a position where the magnetic tape can be read. When the second chassis means is at the first position, the position between the supply reel and the cylinder is not allowed when recording information on the tape and / or reproducing information from the magnetic tape is not possible. The supply reel, the first tape guide member, and the second tape guide member such that only the first tape guide member, the second tape guide member, and the third tape guide member guide the magnetic tape. The third tape guide member and the cylinder are arranged in the order of the supply reel, the first tape guide member, the second tape guide member, the third tape guide member, and the cylinder, and the second chassis means When in the first position, the first tape guide member contacts the magnetic surface, the second tape guide member contacts the non-magnetic surface, and The third tape guide member in contact with the non-magnetic surface, thereby the objective described above being achieved.

  When the second chassis means is at the first position, an angle at which the magnetic tape is wound around the second tape guide member is 100 degrees or more and 200 degrees or less, and the magnetic tape is attached to the third tape guide member. The angle around the member may be 45 degrees or more and 135 degrees or less.

  When the second chassis means is at the first position, the tangent to the magnetic tape exit side of the second tape guide member and the tangent to the magnetic tape entrance side of the third tape guide member are not on the same plane. Good.

  When the second chassis means is at the first position, a post whose magnetic tape winding tangent is substantially perpendicular to the magnetic tape advancing direction is defined as a vertical post, and the magnetic tape winding tangent is a magnetic tape winding tangent in the magnetic tape advancing direction. The non-perpendicular post may be defined as an inclined post, wherein the first tape guide member is a vertical post, the second tape guide member is an inclined post, and the third tape guide member is a vertical post.

A magnetic recording / reproducing apparatus according to the present invention includes a cylinder for recording information on a magnetic tape having a magnetic surface and a non-magnetic surface and / or reproducing information from the magnetic tape, and a first cylinder provided with the cylinder. A chassis means, a second chassis means slidable with respect to the first chassis means, wherein the second chassis means is configured to be mountable with a cassette including a supply reel for supplying the magnetic tape; At least three tape guide members including a first tape guide member, a second tape guide member, and a third tape guide member, wherein the second chassis means moves between a first position and a second position. The first position is a position where information can be recorded on the magnetic tape and / or the information can be reproduced from the magnetic tape, and the second position is a position where the magnetic tape can be read. A position where recording of information on a tape and / or reproduction of information from the magnetic tape is impossible, and when the second chassis means is at the first position, a position between the supply reel and the cylinder The supply reel, the first tape guide member, and the second tape guide member such that only the first tape guide member, the second tape guide member, and the third tape guide member guide the magnetic tape. The third tape guide member and the cylinder are arranged in the order of the supply reel, the first tape guide member, the second tape guide member, the third tape guide member, and the cylinder, and the second chassis means wherein when in the first position is L ₁ ≧ 2B, the B represents the width of said magnetic tape, wherein L _1, the second tape guide The distance between the magnetic tape exit point of the material and the magnetic tape entrance point of the third tape guide member is indicated, and the magnetic tape exit point of the second tape guide member is the magnetic tape exit point of the second tape guide member. A point of intersection of a side tangent and a center line of the magnetic tape, and the magnetic tape incident point of the third tape guide member is defined by a magnetic tape incident side tangent of the third tape guide member and the center line of the magnetic tape. And the above object is achieved.

  When the second chassis means is at the first position, the tangent to the magnetic tape exit side of the second tape guide member and the tangent to the magnetic tape entrance side of the third tape guide member are on the same plane. You don't have to.

When the second chassis means is at the first position, the magnetic recording / reproducing apparatus satisfies L ₂ ≧ 2B, and L ₂ is a distance between the magnetic tape emission point of the supply reel and the first tape guide. The distance between the magnetic tape entrance point of the member and the magnetic tape exit point of the supply reel is the intersection of the magnetic tape exit side tangent of the supply reel and the center line of the magnetic tape, and The magnetic tape incident point of one tape guide member may be an intersection of a tangent to the magnetic tape incident side of the first tape guide member and the center line of the magnetic tape.

  When the second chassis means is at the first position, the tangent to the magnetic tape exit side of the supply reel and the tangent to the magnetic tape entrance side of the second tape guide member may not be on the same plane. .

A magnetic recording / reproducing apparatus according to the present invention includes a cylinder for recording information on a magnetic tape having a magnetic surface and a non-magnetic surface and / or reproducing information from the magnetic tape, and a first cylinder provided with the cylinder. A chassis means, a second chassis means slidable with respect to the first chassis means, wherein the second chassis means is configured to be mountable with a cassette including a supply reel for supplying the magnetic tape; At least three tape guide members including a first tape guide member, a second tape guide member, and a third tape guide member, wherein the second chassis means moves between a first position and a second position. The first position is a position where information can be recorded on the magnetic tape and / or the information can be reproduced from the magnetic tape, and the second position is a position where the magnetic tape can be read. A position where recording of information on a tape and / or reproduction of information from the magnetic tape is impossible, and when the second chassis means is at the first position, a position between the supply reel and the cylinder The supply reel, the first tape guide member, and the second tape guide member such that only the first tape guide member, the second tape guide member, and the third tape guide member guide the magnetic tape. The third tape guide member and the cylinder are arranged in the order of the supply reel, the first tape guide member, the second tape guide member, the third tape guide member, and the cylinder, and the second chassis means When in the first position, the first tape guide member is in contact with the magnetic surface, and the second tape guide member is in contact with the non-magnetic surface. Said third tape guide member is in contact with the non-magnetic surface, when the second chassis section is in the first position is L ₁ ≧ 2B, the B represents the width of said magnetic tape, said L ₁ indicates the distance between the magnetic tape exit point of the second tape guide member and the magnetic tape entrance point of the third tape guide member, and the magnetic tape exit point of the second tape guide member is The point of intersection of the tangent to the magnetic tape exit side of the second tape guide member and the center line of the magnetic tape, and the point of incidence of the magnetic tape of the third tape guide member to the tangent to the magnetic tape entrance side of the third tape guide member. And the center line of the magnetic tape, and when the second chassis means is at the first position, the tangent to the magnetic tape exit side of the second tape guide member and the third tape guide portion The material is not coplanar with the tangent to the magnetic tape entrance side of the material, thereby achieving the above object.

  According to the magnetic recording / reproducing apparatus of the present invention, the supply reel is configured such that only the first tape guide member, the second tape guide member, and the third tape guide member guide the magnetic tape between the supply reel and the cylinder. The first tape guide member, the second tape guide member, the third tape guide member, and the cylinder are arranged in the order of a supply reel, a first tape guide member, a second tape guide member, a third tape guide member, and a cylinder. When the chassis means is in the first position, the first tape guide member contacts the magnetic surface of the magnetic tape, the second tape guide member contacts the non-magnetic surface, and the third tape guide member contacts the non-magnetic surface.

  Therefore, even if the first chassis means provided with the cylinder and the second chassis means slidable with respect to the first chassis means, the number of tape guide members between the supply reel and the cylinder is reduced. Can be reduced.

  As a result, it is possible to prevent the tape tension during the tape running from increasing and to stabilize the tape running (for example, (i) no tape damage occurs, (ii) the tape running in the tape running direction during the tape running). (Iii) that the tape does not buckle and deform; and (iv) that the contact pressure between the cylinder and the magnetic tape is stable.

According to the magnetic recording / reproducing apparatus of the present invention, when the second chassis means is at the first position, L ₁ ≧ 2B, B indicates the width of the magnetic tape, and L ₁ is the second tape guide. The distance between the magnetic tape exit point of the member and the magnetic tape entrance point of the third tape guide member is shown.

  Therefore, the interval between the tape guide members becomes longer, and variations in the inclination accuracy and position accuracy of each tape guide member do not affect the running stability of the tape.

  As a result, it is possible to realize simplification of the apparatus, downsizing, and cost reduction of parts. Further, the distance between the tape guide members becomes longer, the amount of twist of the tape can be increased, and the degree of freedom in designing the tape traveling path can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a structure of a magnetic recording / reproducing apparatus 100 in a first state according to an embodiment of the present invention.

  The magnetic recording / reproducing apparatus 100 includes a main chassis 1, a cylinder 2, a sub-chassis 3 in which a cassette 4 storing a magnetic tape 5 can be mounted, and a plurality of tape guide members.

  The first state is a state in which information can be recorded on the magnetic tape 5 and / or information can be reproduced from the magnetic tape 5. For example, after the user mounts the cassette 4 on the sub-chassis means 3, the sub-chassis means 3 moves in the direction of the cylinder 2, and the plurality of tape guide members pull out the magnetic tape 5 from the cassette 4, and remove the magnetic tape 5 from the cassette 4. It is wound around the cylinder 2 at a predetermined angle. As described above, the magnetic recording / reproducing apparatus 100 enters the first state in which information can be recorded on the magnetic tape 5 and / or the information can be reproduced from the magnetic tape 5.

  The arrow A shown in FIG. 1 indicates the running direction of the magnetic tape 5 when recording information on the magnetic tape 5.

  FIG. 2 shows the structure of the magnetic recording / reproducing device 100 in the second state according to the embodiment of the present invention.

  The second state is a state where recording of information on the magnetic tape 5 and / or reproduction of information from the magnetic tape 5 are impossible. For example, in the second state, the user can attach and detach the cassette 4 to and from the sub-chassis means 3.

  Hereinafter, the structure of the magnetic recording / reproducing apparatus 100 will be described in detail with reference to FIGS.

  The magnetic recording / reproducing apparatus 100 includes a main chassis 1, a cylinder 2 provided in the main chassis 1, a sub-chassis 3 in which a cassette 4 in which a magnetic tape 5 is stored can be mounted, and a plurality of tapes. And a guide member.

  The main chassis means 1 guides the sub-chassis means 3 which reciprocates along the cylinder 2 direction.

  The cylinder 2 records information on a magnetic tape 5 having a magnetic surface and a non-magnetic surface and / or reproduces information from the magnetic tape 5.

  The sub-chassis means 3 is configured to be slidable with respect to the main chassis means 1. The sub-chassis means 3 includes a position (first position) of the sub-chassis means 3 when the magnetic recording / reproducing apparatus 100 is in the first state, and a sub-chassis when the magnetic recording / reproducing apparatus 100 is in the second state. It moves between the position of the means 3 (the second position).

  The cassette 4 includes a supply reel 6 and a take-up reel 7. The magnetic tape 5 is wound around a supply reel 6 and a take-up reel 7.

  The plurality of tape guide members include, for example, a first tape guide member 8, a second tape guide member 9, a third tape guide member 10, a fourth tape guide member 11, a fifth tape guide member 12, and a sixth tape guide member 13. It is.

  The first tape guide member 8 is fixed to the sub-chassis means 3.

  The magnetic recording / reproducing device 100 further includes a first arm 9a and a rotating shaft 9b.

  The second tape guide member 9 is provided on the first arm 9a. The rotating shaft 9b is provided on the sub-chassis means 3. The rotation shaft 9b rotatably supports the first arm 9a. The driving means (not shown) moves the second tape guide member 9 from the position of the second tape guide member 9 in the second state with the movement of the subchassis means 3 from the second position to the first position. The first arm 9a is driven to move to the position of the second tape guide member 9 in the 1 state.

  The magnetic recording / reproducing device 100 further includes a first tape guide moving member 10a.

  The third tape guide member 10 is provided on the first tape guide moving member 10a. The driving means (not shown) moves the third tape guide member 10 from the position of the third tape guide member 10 in the second state with the movement of the sub-chassis means 3 from the second position to the first position. The first tape guide moving member 10a is driven to move to the position of the third tape guide member 10 in the 1 state.

  The magnetic recording / reproducing device 100 further includes a second tape guide moving member 11a.

  The fourth tape guide member 11 and the fifth tape guide member 12 are provided on the second tape guide moving member 11a. The driving means (not shown) moves the fourth tape guide member 11 and the fifth tape guide member 12 in the fourth state when the sub-chassis means 3 moves from the second position to the first position. The second tape guide moving member 11a is driven to move from the position of the tape guide member 11 and the fifth tape guide member 12 to the position of the fourth tape guide member 11 and the fifth tape guide member 12 in the first state. I do.

  The magnetic recording / reproducing device 100 further includes a second arm 13a and a rotating shaft 13b.

  The sixth tape guide member 13 is provided on the second arm 13a. The rotating shaft 13b is provided on the sub-chassis means 3. The rotation shaft 13b rotatably supports the second arm 13a. The driving means (not shown) moves the sixth tape guide member 13 from the position of the sixth tape guide member 13 in the second state with the movement of the sub-chassis means 3 from the second position to the first position. The second arm 13a is driven to move to the position of the sixth tape guide member 13 in the 1 state.

  The magnetic recording / reproducing device 100 further includes a capstan 14.

  The capstan 14 is provided on the main chassis means 1. A pinch roller (not shown) presses the magnetic tape 5 against the capstan 14. The capstan 14 drives the magnetic tape 5 so that the magnetic tape 5 runs.

  When the sub-chassis means 3 moves from the second position to the first position, the first tape guide member 8, the second tape guide member 9, the third tape guide member 10, the fourth tape guide member 11, and the fifth The tape guide member 12 and the sixth tape guide member 13 cooperate to draw out the tape 5 from the cassette 4 and wind the tape 5 around the cylinder 2 and the capstan 14.

  When the sub-chassis means 3 is at the first position, only the first tape guide member 8, the second tape guide member 9, and the third tape guide member 10 are provided between the supply reel 6 and the cylinder 2 by the magnetic tape 5. The supply reel 6, the first tape guide member 8, the second tape guide member 9, the third tape guide member 10, and the cylinder 2 so as to guide the supply reel 6, the first tape guide member 8, and the second tape. The guide member 9, the third tape guide member 10, and the cylinder 2 are arranged in this order.

  Since the magnetic tape 5 supplied from the supply reel 6 is wound around the first tape guide member 8 fixed to the sub-chassis means 3 without passing through another tape guide member, the running of the magnetic tape 5 is stabilized. Sex is improved.

  When the sub-chassis means 3 is at the first position, the first tape guide member 8 contacts the magnetic surface of the magnetic tape 5, the second tape guide member 9 contacts the non-magnetic surface, and the third tape guide member 10 Contact non-magnetic surface.

  The tape guide members (the second tape guide member 9 and the third tape guide member 10) in contact with the non-magnetic surface of the magnetic tape 5 are movable with respect to the sub-chassis means 3 in order to pull out the magnetic tape 5 from the cassette 4. is there.

  FIG. 3 shows a tape winding angle of the magnetic tape 5 with respect to the second tape guide member 9. FIG. 3 is a view of the second tape guide member 9 viewed from the axial direction when the sub-chassis means 3 is at the first position. The angle G is a tape winding angle of the magnetic tape 5 with respect to the second tape guide member 9. For example, the angle G at which the magnetic tape 5 winds around the second tape guide member 9 is 100 degrees or more and 200 degrees or less.

  FIG. 4 shows a tape winding angle of the magnetic tape 5 with respect to the third tape guide member 10. FIG. 4 is a view of the third tape guide member 10 viewed from the axial direction when the sub-chassis means 3 is at the first position. The angle C is a tape winding angle of the magnetic tape 5 with respect to the third tape guide member 10. For example, the angle C at which the magnetic tape 5 winds around the third tape guide member 10 is not less than 45 degrees and not more than 135 degrees.

  Hereinafter, the vertical post and the inclined post when the sub-chassis means 3 is at the first position will be described.

  The vertical post is perpendicular to the tape running direction. That is, when the magnetic tape 5 is wound around the vertical post, the height of the center line of the magnetic tape 5 and the inclination of the surface of the magnetic tape 5 do not change before and after the post of the magnetic tape 5.

  The inclined post is not perpendicular to the tape running direction. That is, when the magnetic tape 5 is wound around the inclined post, the height of the center line of the magnetic tape 5 and the inclination of the surface of the magnetic tape 5 change before and after the entry of the magnetic tape 5 to the post. The amount of change in the height of the center line of the magnetic tape 5 and the inclination of the surface of the magnetic tape 5 are (i) the angle between the inclined post and the incident tape running direction (tape incident angle on the post), and (ii) the inclined post. Based on the winding angle of the tape to the

  In the cassette 4, the height of the center line of the magnetic tape 5, the height of the supply reel 6, and the height of the take-up reel 7 are the same. Further, in the cassette 4, the inclination of the surface of the magnetic tape 5 is perpendicular to the tape running direction. For example, in a helical scan type VTR, the magnetic tape 5 is inclined at a predetermined angle, and the magnetic tape 5 is wound around the cylinder 2.

  When the sub-chassis means 3 is at the first position, the winding tangent between the first tape guide member 8 and the magnetic tape 5 intersects substantially perpendicularly to the direction of travel of the magnetic tape. That is, the first tape guide member 8 is a vertical post.

  When the sub-chassis means 3 is at the first position, the winding tangent between the second tape guide member and the 9 magnetic tape 5 crosses obliquely with respect to the direction of travel of the magnetic tape. That is, the second tape guide member 9 is an inclined post.

  When the sub-chassis means 3 is at the first position, the winding tangent between the third tape guide member 10 and the magnetic tape 5 intersects substantially perpendicularly to the direction of movement of the magnetic tape. That is, the third tape guide member 10 is a vertical post.

  FIG. 5 shows the distance between the second tape guide member 9 and the third tape guide member 10 when the sub-chassis means 3 is at the first position, and the distance between the second tape guide member 9 and the third tape guide member 10. Shows the relationship of the winding tangent. The relationship of the winding tangent is the relationship of the winding tangent between the second tape guide member 9 and the third tape guide member 10 as seen from the direction indicated by the arrow D shown in FIG.

  In FIG. 5, the magnetic tape 5 runs in the direction of arrow A. Reference numeral 5a indicates a winding tangent line between the magnetic tape 5 and the second tape guide member 9, that is, an end of a contact area between the magnetic tape 5 and the second tape guide member 9. The magnetic tape 5 is wound around the second tape guide member 9 up to the winding tangent 5a, and is separated from the second tape guide member 9 at the winding tangent 5a, so that the winding tangent 5a is a magnetic tape of the second tape guide member 9. It is also the emission side tangent 5a. In other words, the magnetic tape exit side tangent 5 a is a winding tangent of the magnetic tape 5 downstream of the second tape guide member 9.

  Reference numeral 5b indicates a winding tangent between the magnetic tape 5 and the third tape guide member 10, that is, an end of a contact area between the magnetic tape 5 and the third tape guide member 10. Since the magnetic tape 5 is wound around the third tape guide member 10 from the winding tangent 5b, that is, comes into contact with the third tape guide member 10 from the winding tangent 5b, the winding tangent 5b is Of the magnetic tape incident side 5b. In other words, the magnetic tape incident side tangent 5b is a winding tangent of the magnetic tape 5 on the upstream side of the third tape guide member 10.

  Reference numeral 5A is an intersection of the magnetic tape exit side tangent 5a of the second tape guide member 9 and the center line 5C of the magnetic tape 5, and indicates the magnetic tape exit point 5A of the second tape guide member 9. Reference numeral 5B is an intersection of the magnetic tape incident side tangent 5b of the third tape guide member 10 and the center line 5C of the magnetic tape 5, and indicates the magnetic tape incident point 5B of the third tape guide member 10.

There is a relationship of L ₂₃ ≧ 2B between the second tape guide member 9 and the third tape guide member 10. Width B is the width of the magnetic tape 5, the distance L ₂₃ is the distance between the magnetic tape entrance point 5B of the magnetic tape exit point 5A and the third tape guide members 10 of the second tape guide member 9.

The magnetic tape exit side tangent 5a of the second tape guide member 9 and the magnetic tape entrance side tangent 5b of the third tape guide member 10 are not on the same plane but on different planes. This is because the magnetic tape 5 is twisted between the magnetic tape exit side tangent 5a of the second tape guide member 9 and the magnetic tape entrance side tangent 5b of the third tape guide member 10. When the relationship of L ₂₃ ≧ 2B is satisfied, an experiment was performed to ensure a sufficient amount of twist (2 deg or more) between the second tape guide member 9 and the third tape guide member 10 without impairing the tape running stability. Could be confirmed.

  The torsion between the magnetic tape exit side tangent 5a and the magnetic tape entrance side tangent 5b will be described in more detail with reference to FIG.

It is more preferable that there is a relationship of L ₀₁ ≧ 2B between the supply reel 6 and the first tape guide member 8. Width B is the width of the magnetic tape 5, the distance L ₀₁ is the distance between the magnetic tape exit point of the supply reel 6 and the magnetic tape entrance point of the first tape guide member 8. The magnetic tape exit point of the supply reel 6 is the intersection of the magnetic tape exit side tangent of the supply reel 6 and the center line 5C of the magnetic tape 5, and the magnetic tape entrance point of the first tape guide member 8 is the first tape guide member 8. This is the intersection of the tangent of the tape guide member 8 on the magnetic tape incident side and the center line 5C of the magnetic tape 5.

  The tangent of the supply reel 6 on the magnetic tape exit side (the tangent of the tape winding on the downstream side of the supply reel) and the tangent of the second tape guide member 9 on the magnetic tape entrance side (the tape winding on the upstream side of the second tape guide member 9). The tangent line) is not on the same plane but on different planes. This is because the magnetic tape 5 is twisted between the tangent of the supply reel 6 on the magnetic tape exit side and the tangent of the second tape guide member 9 on the magnetic tape entrance side.

When the relationship of L ₀₁ ≧ 2B is satisfied, it has been experimentally confirmed that a sufficient amount of twist (2 deg or more) can be secured between the supply reel 6 and the second tape guide member 9 without impairing the tape running stability. did it.

The distance L between the two posts (for example, the distance L ₀₁ between the magnetic tape exit point of the supply reel 6 and the magnetic tape entrance point of the first tape guide member 8, the magnetic tape exit point of the second tape guide member 9) When the distance L ₂₃ ) between the third tape guide member 10 and the magnetic tape incident point is large, even if the position of each post and the inclination of each post greatly deviate from the desired position and the desired inclination, the magnetic force is reduced. The running stability of the tape 5 can be maintained.

  FIG. 6 shows a positional relationship between the second tape guide member 9 and the third tape guide member 10 in the first state position according to the embodiment of the present invention. This positional relationship is a positional relationship between the second tape guide member 9 and the third tape guide member 10 as viewed from the direction indicated by the arrow E shown in FIG.

  The angle F is a relative angle between the second tape guide member 9 and the third tape guide member 10. The magnetic tape 5 is twisted by an angle F between the second tape guide member 9 and the third tape guide member 10.

  When the distance L between the two posts is large, the magnetic tape 5 can be twisted between the two posts. The height of the center line of the magnetic tape and the inclination of the surface of the magnetic tape can be changed between before and after the entry of the post, depending on the amount of twist (the torsion angle) of the magnetic tape 5 between the two posts.

  By twisting the magnetic tape 5 in this way, it becomes possible to design a tape running path that could not be achieved with the vertical post and the inclined post. When the amount of tape torsion is increased, the degree of freedom in designing the tape running path is increased, and the number of tape guide members can be reduced as compared with the related art.

  The embodiments of the present invention have been described with reference to the drawings.

  In the drawings referred to in the description of the embodiments of the present invention, in order to further clarify the relationship of the winding tangent between the tape guide members, the winding angle of the tape to each tape guide member, the inclination angle of the tape guide member, and the like. It is shown exaggerated.

  In the embodiment of the present invention, the first tape guide member 8 is provided directly on the sub-chassis means 3, but the second tape guide member 9 is provided on the sub-chassis means 3 via the first arm 9a. Alternatively, the first tape guide member 8 may be provided on the sub-chassis means 3 via another component.

  In the magnetic recording / reproducing apparatus 100 of the present invention, the adjacent tape guide members other than the second tape guide member 9 and the third tape guide member 10, the winding tangents between the supply reel 6 and the take-up reel 7 and the magnetic tape 5, It does not matter whether they are on the same plane or not.

According to the magnetic recording / reproducing apparatus of the present invention, the supply reel is configured such that only the first tape guide member, the second tape guide member, and the third tape guide member guide the magnetic tape between the supply reel and the cylinder. The first tape guide member, the second tape guide member, the third tape guide member, and the cylinder are arranged in the order of a supply reel, a first tape guide member, a second tape guide member, a third tape guide member, and a cylinder. When the chassis means is in the first position, the first tape guide member contacts the magnetic surface of the magnetic tape, the second tape guide member contacts the non-magnetic surface, and the third tape guide member contacts the non-magnetic surface.
Therefore, even if the first chassis means provided with the cylinder and the second chassis means slidable with respect to the first chassis means, the number of tape guide members between the supply reel and the cylinder is reduced. Can be reduced.

  As a result, it is possible to prevent the tape tension during the tape running from increasing, and to stabilize the tape running.

According to the magnetic recording / reproducing apparatus of the present invention, when the second chassis means is at the first position, L ₁ ≧ 2B, B indicates the width of the magnetic tape, and L ₁ is the second tape guide. The distance between the magnetic tape exit point of the member and the magnetic tape entrance point of the third tape guide member is shown.

  Therefore, the interval between the tape guide members becomes longer, and variations in the inclination accuracy and position accuracy of each tape guide member do not affect the running stability of the tape.

  As a result, it is possible to realize simplification of the apparatus, downsizing, and cost reduction of parts. Further, the distance between the tape guide members becomes longer, the amount of twist of the tape can be increased, and the degree of freedom in designing the tape traveling path can be increased.

  As described above, the present invention has been exemplified using the preferred embodiments of the present invention, but the present invention should not be construed as being limited to these embodiments. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and common technical knowledge from the description of the specific preferred embodiments of the present invention. Patents, patent applications, and references cited herein are to be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

FIG. 2 is a diagram illustrating a structure of a magnetic recording / reproducing device 100 in a first state according to the embodiment of the present invention. FIG. 2 is a diagram illustrating a structure of a magnetic recording / reproducing device 100 in a second state according to the embodiment of the present invention. FIG. 9 is a diagram showing a tape winding angle of the magnetic tape 5 with respect to the second tape guide member 9; FIG. 4 is a diagram illustrating a tape winding angle of a magnetic tape 5 with respect to a third tape guide member 10. The distance between the second tape guide member 9 and the third tape guide member 10 when the sub-chassis means 3 is in the first position, and the winding tangent between the second tape guide member 9 and the third tape guide member 10 FIG. FIG. 4 is a diagram illustrating a positional relationship between a second tape guide member 9 and a third tape guide member 10 in a first state position according to the embodiment of the present invention. FIG. 1 is a diagram showing a conventional magnetic recording / reproducing device 700 disclosed in Japanese Patent Application Laid-Open No. 11-273194.

Explanation of reference numerals

Reference Signs List 1 Main chassis means 2 Cylinder 3 Sub-chassis means 4 Cassette 5 Magnetic tape 6 Supply reel 7 Take-up reel 8 First tape guide member 9 Second tape guide member 9a First arm 9b Rotating shaft 10 Third tape guide member 10a 1 tape guide moving member 11 fourth tape guide member 11a second tape guide moving member 12 fifth tape guide member 13 sixth tape guide member 13a second arm 13b rotating shaft 14 capstan 100 magnetic recording / reproducing device

Claims (9)

A cylinder for recording information on and / or reproducing information from the magnetic tape having a magnetic surface and a non-magnetic surface,
First chassis means provided with the cylinder;
A second chassis means configured to be movable with respect to the first chassis means, wherein a second chassis means configured to mount a cassette including a supply reel for supplying the magnetic tape;
And at least three tape guide members including a first tape guide member, a second tape guide member, and a third tape guide member.
The second chassis means moves between a first position and a second position;
The first position is a position where information can be recorded on the magnetic tape and / or information can be reproduced from the magnetic tape,
The second position is a position where recording of information on the magnetic tape and / or reproduction of information from the magnetic tape are impossible,
When the second chassis means is at the first position, only the first tape guide member, the second tape guide member, and the third tape guide member are provided between the supply reel and the cylinder. The supply reel, the first tape guide member, the second tape guide member, the third tape guide member, and the cylinder are configured to guide the magnetic tape, and the supply reel, the first tape guide member, A second tape guide member, the third tape guide member, and the cylinder arranged in this order;
When the second chassis means is at the first position, the first tape guide member is in contact with the magnetic surface, the second tape guide member is in contact with the non-magnetic surface, and the third tape guide member is A magnetic recording / reproducing device which is in contact with the non-magnetic surface.   When the second chassis means is at the first position, an angle at which the magnetic tape is wound around the second tape guide member is 100 degrees or more and 200 degrees or less, and the magnetic tape is attached to the third tape guide member. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein an angle around the member is 45 degrees or more and 135 degrees or less.   When the second chassis means is at the first position, the tangent of the magnetic tape exit side of the second tape guide member and the tangent of the magnetic tape entrance side of the third tape guide member are not on the same plane, The magnetic recording / reproducing apparatus according to claim 2. When the second chassis means is in the first position, a post whose magnetic tape winding tangent is substantially perpendicular to the magnetic tape advancing direction is defined as a vertical post, and the magnetic tape winding tangent is a magnetic tape advancing tangent in the magnetic tape advancing direction. Posts that are not perpendicular to it are defined as tilted posts,
The magnetic recording / reproducing apparatus according to claim 3, wherein the first tape guide member is a vertical post, the second tape guide member is an inclined post, and the third tape guide member is a vertical post. A cylinder for recording information on and / or reproducing information from the magnetic tape having a magnetic surface and a non-magnetic surface,
First chassis means provided with the cylinder;
A second chassis means slidable with respect to the first chassis means, wherein the second chassis means is configured to be capable of mounting a cassette including a supply reel for supplying the magnetic tape;
And at least three tape guide members including a first tape guide member, a second tape guide member, and a third tape guide member,
The second chassis means moves between a first position and a second position;
The first position is a position where information can be recorded on the magnetic tape and / or information can be reproduced from the magnetic tape,
The second position is a position where recording of information on the magnetic tape and / or reproduction of information from the magnetic tape are impossible,
When the second chassis means is at the first position, only the first tape guide member, the second tape guide member, and the third tape guide member are provided between the supply reel and the cylinder. The supply reel, the first tape guide member, the second tape guide member, the third tape guide member, and the cylinder are configured to guide the magnetic tape so that the supply reel, the first tape guide member, A second tape guide member, the third tape guide member, and the cylinder arranged in this order;
When the second chassis means is in the first position, L ₁ ≧ 2B;
B represents the width of the magnetic tape,
Wherein L ₁ represents the distance between the magnetic tape entrance point of said magnetic tape exit point of the second tape guide member third tape guide member,
The magnetic tape emission point of the second tape guide member is an intersection of a magnetic tape emission side tangent of the second tape guide member and a center line of the magnetic tape,
The magnetic recording / reproducing apparatus, wherein the magnetic tape incident point of the third tape guide member is an intersection of a tangent of the third tape guide member on the magnetic tape incident side and the center line of the magnetic tape.   When the second chassis means is at the first position, the tangent to the magnetic tape exit side of the second tape guide member and the tangent to the magnetic tape entrance side of the third tape guide member are on the same plane. The magnetic recording / reproducing apparatus according to claim 5, wherein the apparatus is not provided. When the second chassis means is at the first position, the magnetic recording / reproducing apparatus satisfies L ₂ ≧ 2B;
Wherein L ₂ represents the distance between the magnetic tape entrance point of the first tape guide member and the magnetic tape exit point of the supply reel,
The magnetic tape emission point of the supply reel is an intersection of the magnetic tape emission side tangent of the supply reel and the center line of the magnetic tape,
7. The magnetic recording / reproducing apparatus according to claim 6, wherein the magnetic tape incident point of the first tape guide member is an intersection of a tangent to a magnetic tape incident side of the first tape guide member and the center line of the magnetic tape. .   The magnetic tape exit side tangent of the supply reel and the magnetic tape entrance side tangent of the second tape guide member are not on the same plane when the second chassis means is at the first position. Item 8. A magnetic recording and reproducing apparatus according to Item 7. A cylinder for recording information on and / or reproducing information from the magnetic tape having a magnetic surface and a non-magnetic surface,
First chassis means provided with the cylinder;
A second chassis means slidable with respect to the first chassis means, wherein the second chassis means is configured to be capable of mounting a cassette including a supply reel for supplying the magnetic tape;
And at least three tape guide members including a first tape guide member, a second tape guide member, and a third tape guide member,
The second chassis means moves between a first position and a second position;
The first position is a position where information can be recorded on the magnetic tape and / or information can be reproduced from the magnetic tape,
The second position is a position where recording of information on the magnetic tape and / or reproduction of information from the magnetic tape are impossible,
When the second chassis means is at the first position, only the first tape guide member, the second tape guide member, and the third tape guide member are provided between the supply reel and the cylinder. The supply reel, the first tape guide member, the second tape guide member, the third tape guide member, and the cylinder are configured to guide the magnetic tape so that the supply reel, the first tape guide member, A second tape guide member, the third tape guide member, and the cylinder arranged in this order;
When the second chassis means is at the first position, the first tape guide member is in contact with the magnetic surface, the second tape guide member is in contact with the non-magnetic surface, and the third tape guide member is In contact with the non-magnetic surface,
When the second chassis means is in the first position, L ₁ ≧ 2B;
B represents the width of the magnetic tape,
Wherein L ₁ represents the distance between the magnetic tape entrance point of said magnetic tape exit point of the second tape guide member third tape guide member,
The magnetic tape emission point of the second tape guide member is an intersection of a magnetic tape emission side tangent of the second tape guide member and a center line of the magnetic tape,
The magnetic tape incident point of the third tape guide member is an intersection of the magnetic tape incident side tangent of the third tape guide member and the center line of the magnetic tape,
When the second chassis means is at the first position, the tangent to the magnetic tape exit side of the second tape guide member and the tangent to the magnetic tape entrance side of the third tape guide member are on the same plane. Not a magnetic recording and playback device.

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