JPH04325956A - Tape loading mechanism for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve operational reliability and to make the device compact and light in weight by respectively independently setting timing for moving and pressurizing operations while maintaining a single drive source for the first and second tape guide members. CONSTITUTION:A cylinder 6 mounting a rotating magnetic head is loaded on a main chassis 1. Tape guide members 16 and 17 are loaded on a first guide base member 51, and a tape guide member 18 is loaded on a second guide base member 52. The first guide base member 51 is driven by a second driving member 62 freely turnably engaged to a first driving member 61. On the other hand, the second guide base member 52 is driven by a third driving member 63 linked through a fourth driving member 64, which idly varies the engage position in the moving direction of the first driving member 61, to the first driving member 61. Thus, the tape loading mechanism for the magnetic recording and reproducing device, which can be made compact and light in weight, can be presented with the high operational reliability at the low equipment cost.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a tape loading mechanism for a magnetic recording/reproducing device, and in particular, the present invention relates to a tape loading mechanism for a magnetic recording/reproducing device.
The present invention relates to a tape loading mechanism that is suitable for magnetic recording and reproducing devices that increase the tape winding angle around the cylinder to around 300° and miniaturize the device.

0002

2. Description of the Related Art In order to downsize the device and improve the operational reliability of the mechanism, for example, as described in Japanese Patent Laid-Open No. 2-21455, in a tape loading mechanism, a ring-shaped drive member for driving each tape guide member is used. Some use a drive member of In this type of device, each tape guide member engages with a ring-shaped drive member via a connecting member, and an independent drive member is used for each tape guide member.

0003

The above-mentioned prior art is very advantageous in improving the reliability of the mechanism. however,
Especially in systems where the tape is wrapped at a large angle around the cylinder.
In order to achieve a stable tape loading operation and to achieve downsizing, it may be necessary to increase the number of moving tape guide members. At this time, as mentioned above, in the case of a method in which a single tape guide member is driven by a single drive member,
This increases the number of drive members and drive sources for the drive members, increases the number of parts, increases the cost of the device, and is disadvantageous in reducing the size of the device.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape loading mechanism for a magnetic recording/reproducing apparatus that has high operational reliability, low component cost, and can be made smaller and lighter.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the first tape guide member is driven by a second drive member connected to the first drive member, and the second tape guide member is driven by the second drive member connected to the first drive member. The fourth drive member is connected to the first drive member via a third drive member whose engagement position is variable in the moving direction of the first drive member. In addition, the posture change operation of the first tape guide member just before the end of the loading operation is performed not only by the loading guide member (guide plate) but also by the second drive member engaged with the first tape guide member and the second drive member engaged with the first tape guide member. A biasing spring for attitude changing operation is provided between the third drive member that engages with the second tape guide member or the fourth drive member that engages with the third drive member, and this The structure is such that it also serves as a pressure bonding spring for biasing the position regulating member of the tape guide member.

[0006]

[Operation] With the above structure, the tape guide member is biased in a desired direction during tape loading operation by the biasing spring provided on the drive member that connects the tape guide member and the ring-shaped drive member. The biasing spring makes it possible to reliably regulate the crimp position while converting the attitude of the tape guide member into a positioning member. This allows the first tape guide member and the second tape guide member to have independent movement and crimping timing settings while maintaining a single drive source, and also reduces the number of parts to the necessary minimum. It is possible to keep it. Furthermore, since it is possible to simplify the shape of the loading guide member, it is also advantageous for reducing the cost of the device.

[0007]

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.
This will be explained using FIG. FIG. 1 is a plan view showing the entire tape loading mechanism according to an embodiment of the present invention.
This shows the state before the tape loading operation starts (unloading state). FIG. 2 is a plan view showing the end of the tape loading operation (loading completion state). 3 is a schematic plan view showing the structure of the tape loading mechanism in the unloading state shown in FIG. 1, and FIG. 4 is a schematic plan view showing the structure of the tape loading mechanism in the loading completed state shown in FIG.

In the figure, 1 is a main chassis, and 2 is a subchassis. A cylinder 6 equipped with a magnetic head (not shown) and a capstan motor 9 are mounted on the main chassis 1. A supply reel stand 4, a take-up reel stand 5, and a cassette 3 (indicated by two-dot chain lines) are mounted on the subchassis 2. The magnetic tape 7 sent out from the supply reel 4 in the cassette 3 has a tape guide member 10,
11, 12, 13, 14, 15, 16, 17, 18, 1
9 and 21, it is stably wound around the cylinder 6, held between the pinch roller 20 and the capstan 9, driven, and taken up by the take-up reel 5 in the cassette 3.

The driving force of the drive motor 8, which is the power source for mode operation, is transmitted through transmission mechanisms 23, 24, 25, and 26 to a cam member 27 having a grooved cam 27a on the gear, and further a grooved cam 28a on the gear. , b. The arrow in the figure shows the state from the unloading state to
It shows the rotation and movement directions of each transmission mechanism when moving to the loading completion state (during loading operation). A portion 34c of an operating member 34, which is also a sub-chassis driving arm, is engaged with the grooved cam 28a, and one end 34b of the operating member 34 is engaged with the main chassis 1. Operation member 3
4 is rotatably supported by the sub-chassis 2. With the movement of each transmission mechanism shown by the arrow in the figure during the loading operation, the operating member 34 rotates about 34a as shown by the arrow L in the figure. The position relative to the main chassis 1 is changed by being guided by the guide member on the main chassis 1 inserted therein.

Next, details of the tape loading mechanism will be explained using FIGS. 3, 4, 5, 6, and 7. Figure 5,
6 and 7 are perspective views showing details of a tape loading mechanism according to an embodiment of the present invention.

As shown in the figure, a rack gear part 104 is integrally formed on the sub-chassis 2 along the direction of movement of the sub-chassis 2 during the loading operation, and a sub-chassis part 104 forming a rack gear is slightly longer than the rack gear part 104. A rack gear member 106 is engaged with the subchassis 2 via a compression spring member 105 so as to be movable in the moving direction of the subchassis 2 .

[0012] On the main chassis 1, a drive gear 101,
102 and 103 are installed.

Further, a first drive member 61 is supported on the main chassis 1 through rotary guide members 55, 56, 57, and 58 and engaged with a drive gear 103 so as to be rotatable in the circumferential direction. There is. A second drive member 62 is supported on the first drive member 61 via a rotation shaft 68 so as to be rotatable about the rotation shaft 68 . The tape guide members 16 and 17 are mounted on the first guide base member 51, and the aforementioned second drive member 62 is rotatably mounted on the engagement shaft 51a on the first guide base member 51. engaged. The tape guide member 18 is mounted on the second guide base member 52, the second guide base member is mounted on the third drive member 63, and the third drive member 63 is mounted on the fourth drive member 63. Drive member 6
The fourth drive member 64 is rotatably supported by a rotation shaft 67 on the above-mentioned first drive member 61, and the fourth drive member 64 is rotatably supported by a rotation shaft 67 on the above-mentioned first drive member 61.
6, the first drive member 61 is movably engaged with the first drive member 61 in the circumferential direction.

The tension spring member 70 has one end engaged with the engaging portion 62a of the second driving member 62 described above, and the other end engaged with the engaging portion 63b of the third driving member 63 described above. It matches. Due to the spring force of the tension spring member 70, the second drive member 62 is rotated about the rotation shaft 68 toward the center of the first drive member 61, and is biased. The fourth driving member 64 is the first driving member 61
The third drive member 63 is urged toward the second drive member 62 on the circumference thereof, and the third drive member 63 is rotated toward the center of the first drive member 61 about the rotation shaft 67. dynamically energized.

Next, the operating state of the above tape loading mechanism will be explained. As described above, during the tape loading operation, the sub-chassis 2 changes its position relative to the main chassis 1 along the long grooves 2a, 2b, and 2c of the sub-chassis 2 by the driving force from the drive motor 8. Accordingly, the driving force is transmitted to the driving gears 101, 102, and 103, and each driving gear rotates as shown by the arrow in the figure. Further, the driving force is transmitted to the first driving member 61 described above, and the first driving member 61 rotates as shown by the arrow in the figure. As the first drive member 61 rotates, the first guide base member 51 and the second guide base member 52 on which the tape guide members 16, 17, and 18 are mounted move around the supply reel 48 in the cassette 3 described above. The magnetic tape 7 is pulled out from the cylinder 6, and moved around the cylinder 6 along the first guide path 81 (indicated by the two-dot chain line), and from the middle of the tape loading operation, the first guide base member 51 moves along the second guide path 81. Moving along path 82, the second guide base member
Move along the third guide route 83. Thereafter, the first guide base member 51 is brought into contact with the first position regulating member 92, the second guide base member 52 is brought into contact with the second position regulating member 69, and tape loading is completed. The magnetic tape 7 is wound around the cylinder 6 while the position is regulated. At this time, the aforementioned subchassis 2 and each member mounted on the subchassis 2 move in a direction approaching the cylinder 6, and as a result, each tape guide member 10, 11, 21 mounted on the subchassis 2 and the main The tape guide members 14 and 15 mounted on the chassis 1 perform predetermined rotational movement and parallel movement, and are regulated to a predetermined position to complete the tape loading operation.

Next, the operation of moving the first guide base member 51 of the tape loading mechanism according to an embodiment of the present invention from the first guide path 81 to the second guide path 82, and
Regarding the movement of the second guide base member 52 from the first guide route 81 to the third guide route 83, FIGS. 8 and 9
, will be explained using FIG. 8, 9, and 10 show the first guide base member 51 and the second guide base member 52 from the first guide route 81 to the second guide route from the middle of the tape loading operation to the end of the tape loading operation. 82 is a plan view showing a movement operation to the third guide route 83. As shown in FIG. 8, as the tape loading operation progresses, the first guide base member 51
Traveling along the first guide route 81, at a branch point 110 from the first guide route 81 to the second guide route 82, the guide groove width of the third guide route 83 is the same as that of the guide groove of the second guide route 82. The guide groove width of the first guide route 81 is set to be sufficiently smaller than the width, whereas the guide groove width of the first guide route 81 is set to be the same as that of the second guide route 82. The user is guided from the first guide route 81 to the second guide route 82 . As the tape loading operation progresses, the first guide base member 51 is guided along the second guide path 82 as shown in FIG. The robot is guided along the guide route 81 of No. 1. As described above, the guide groove width of the third guide path 83 is sufficiently smaller than the guide groove width of the second guide path 82, but the second guide base member that engages with the third guide path 83 The width of the engaging portion 52a (see FIG. 6) of 52 is also sufficiently smaller than the guide groove width of the first guide route 81 and the guide groove width of the second guide route 82. Therefore, at the branch point 110, the branch point guide member 111 is installed on the guide plate 35 so that the second guide base member 52 is biased in the direction of the arrow G in FIG. Therefore, the third drive member 63 is rotated by the branch point guide member 111 in the direction of arrow H in the figure. Further, a branch guide member 91 is installed on the main chassis 1 near the branch point 110 between the first guide route 81 and the third guide route 83, and a branch guide member 91 is installed on the main chassis 1.
The branch guide surface 63a (see FIG. 5) installed in the branch guide member 91 engages with the branch guide surface 63a (see FIG. 5), and the second guide base member 52 is guided toward the third guide path 83. The third drive member 63 has only the degree of freedom of rotation about the axis center of the rotation shaft 67, and the branch guide member 91 ensures that the third drive member 63 It is biased toward the route 83 side. Further, the branch guide member 91 described above is installed at a position where it does not engage with or come into contact with the second drive member 62, first drive member 61, and first guide base member 51 described above. Therefore, the second guide base member 52 will not mistakenly enter the second guide path 82 side, and the branch guide member 91 will not interfere with the moving operation of the first guide base member 51. As the tape loading operation progresses, the first drive member 61 further rotates as shown by arrow A, and the first guide base member 51 rotates along the second guide path 82 as shown in FIG. , the second guide base member 52 is guided and moved along the third guide path 83, respectively.

In the above embodiment, the branch guide member 9
1 is installed on the main chassis 1, but even if it is installed on the back side of the guide plate 35 instead of on the main chassis 1, the same operation and effect can be obtained. That is self-evident.

Next, the detailed operating state of the first guide base member 51 just before the end of the tape loading operation described above is shown in FIGS. 11, 12,
This will be explained using FIG. 13. FIGS. 11, 12, and 13 are
FIG. 7 is a plan view showing detailed operating states of the first guide base member 51 and the second guide base member 52 just before the end of the tape loading operation. 13 shows a tape loading operation completed state, FIG. 12 shows a state immediately before the state shown in FIG. 13, and FIG. 11 shows a state immediately before the state shown in FIG. As the tape loading operation progresses, the first guide base member 51 and the second guide base member 52 move as shown in FIGS. 11, 12, and 13. That is, as shown in FIG. 11, as the tape loading operation progresses, the first drive member 61
rotates as shown by arrow A in the figure. With this operation, the first guide base member 51 moves along the second guide path 82 and guides the guide groove 92c of the first position regulating member 92.
will be guided to. Further, the second guide base member 52 moves along the third movement path 83.

Further, when the first driving member 61 described above rotates in the direction of arrow A, the second guide base member 52 comes into contact with the second position regulating member 69, and is prevented from moving as shown in FIG. Since it is stopped and its position is regulated, the third drive member 63 and the fourth drive member 64 also stop, and only the first drive member 61 rotates. With the above operation, the aforementioned tension spring member 70 is expanded,
The tension spring member 70 generates a load P in the direction of arrow B in the figure. Due to the load P in the direction of arrow B, the second drive member 6
2 rotates in the direction of arrow C in the figure with respect to the rotation shaft 68. In the state shown in FIG. 12, the tape guide member 16 on the first guide base member 51 is engaged with the engaging portion 92a on the first position regulating member 92, and the main chassis 2
The first guide base member 51 is restricted from moving in a substantially horizontal direction relative to the tape guide member 16, and the first guide base member 51 is rotatable only around the central axis of the tape guide member 16. At this time, as described above, since the second drive member 62 rotates in the direction of arrow C, the first guide base member 51 rotates around the central axis of the tape guide member 16 as indicated by arrow D in the figure. The tape guide member 17 moves in a direction approaching the cylinder 6 while changing its attitude. Further from the state shown in FIG.
The drive member 61 rotates further, and the tape loading operation ends in the state shown in FIG. Next, a press load state for regulating the positions of the first tape guide member 51 and the second tape guide member 52 in the state shown in FIG. 13, that is, in the tape loading completed state, will be described. When the tape loading operation is completed, the first drive member 61
receives a pressure bonding load F0 from the drive gear 103 described above. This crimp load F0 becomes a crimp load F1 at the rotation shaft 68 on the first drive member 61. In the first guide base member 51, the crimp load F1 is composed of a crimp load component F2 in the direction of entry of the first guide base member 51 into the first position regulating member 92, and a crimp load component in a direction perpendicular to F2. It is distributed to force F3. Crimp load component force F2, F
3, the first guide base member 51 is press-fitted to the first position regulating member 92, and its position, angle of inclination, and direction of inclination are regulated. In the tape loading completion state shown in FIG. 13, the tension spring member 70
generates a load P as shown in the figure. Due to this load P, the second drive member 62 receives a moment force M1 so as to rotate in the direction of arrow C with respect to the central axis of the circuit shaft 68, and this moment force M1 causes the second drive member 62 to rotate in the direction of arrow C with respect to the central axis of the circuit shaft 68. A load F4 that presses the member 51 is generated. At the same time, due to the load P, the second guide base member 52 is given a crimp load F5 to the second position regulating member 69, and a crimp load component F in a direction perpendicular to the crimp load F5 is applied to the second guide base member 52.
7 is given.

As described above, the above-mentioned tension spring member 7
0 generates an eccentric force during the tape loading operation of the first guide base member 51 and a pressure regulating force at the completion of the tape loading operation, and the second
The guide base member 52 also controls the generation of the pressure regulating force at the end of the tape loading operation. In the above embodiment, one end of the tension spring member 70 is engaged with the engaging portion 62a of the second driving member 62, and the engaging portion 62a is the center of rotation of the second driving member 62. By disposing the second drive member 62 inside the movement locus of the shaft 68, the second drive member 62 is intended to bias the first guide base member 51 toward the cylinder 6. If the second drive member 6 is placed outside the movement locus of
2 can also bias the first guide base member 51 in a direction away from the cylinder 6 just before the end of the loading operation. Furthermore, although the other tension spring member 70 is engaged with the third drive member 63 in this embodiment, almost the same operation can be achieved even if the engagement portion is installed on the fourth drive member 64. It is possible and the same effect can be obtained.

[0021]

Effects of the Invention According to this embodiment, in order to downsize the device and achieve stable tape loading operation, even if the number of tape guide members to be moved during loading increases, the increase in the number of parts is kept to the minimum necessary. This is very advantageous for simplifying, downsizing, and lowering the cost of the device. Also, during tape loading operation,
The attitude change of the first tape guide member is provided in the second drive member that connects the first tape guide member and the ring-shaped first drive member, without relying only on the loading guide member (guide plate). Since this is performed by the biasing spring member for changing the posture, it is possible to reliably and reliably change the posture of the first tape guide member during the tape loading operation. In addition, the above biasing spring is
Since it is also used as a compression spring to bias the positioning member of the tape guide member, an increase in the number of parts can be prevented, and the shape of the loading guide member (guide plate) can be simplified, reducing the cost of the device. It is also very advantageous.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the overall configuration of a tape loading mechanism before starting a tape loading operation.

FIG. 2 is a plan view showing the overall configuration at the end of the tape loading operation.

FIG. 3 is a plan perspective view showing the configuration of the loading mechanism in the state of FIG. 1;

FIG. 4 is a plan perspective view showing the configuration of the loading mechanism in the state of FIG. 2;

FIG. 5 is a perspective view showing details of the tape loading mechanism.

FIG. 6 is a perspective view showing details of the tape loading mechanism.

FIG. 7 is a perspective view showing details of the tape loading mechanism.

FIG. 8 is a plan view showing the operation from the middle of the tape loading operation to the end of the tape loading operation.

FIG. 9 is a plan view showing the operation from the middle of the tape loading operation to the end of the tape loading operation.

FIG. 10 is a plan view showing the operation from the middle of the tape loading operation to the end of the tape loading operation.

FIG. 11 is a plan view showing the operation just before the end of the tape loading operation.

FIG. 12 is a plan view showing the operation just before the end of the tape loading operation.

FIG. 13 is a plan view showing the operation just before the end of the tape loading operation.

[Explanation of symbols]

1...Main chassis, 2...Sub chassis, 3...cassette, 6...Cylinder, 7...Magnetic tape, 8... Drive motor, 51...first guide base member, 52...Second guide base member, 61...first driving member, 62...Second driving member, 63...Third driving member, 64... Fourth driving member, 70...Tension spring member, 81...first guide route, 82...Second guidance route, 83...Third guidance route, 91... Branch guide member.

Claims (4)

[Claims] [Claim 1] A cylinder (6) equipped with a rotating magnetic head.
a main chassis (1) on which a magnetic tape (7) is placed, and a tape guide member (10, 11) for pulling out a magnetic tape (7) from a cassette (3) and winding it around the cylinder (6) to form a predetermined tape running path. ,12,13,14,15,16,1
7, 18, 19) and the tape guide member (10, 11)
, 12, 13, 14, 15, 16, 17, 18, 19)
A first guide base member (51) on which one or more tape guide members are mounted, and a tape guide member (10) other than the tape guide member mounted on the first guide base member (51). ,11,12,13,14
, 15, 16, 17, 18, 19) of the cylinders (
a second guide base member (52) on which one or more tape guide members are mounted on the same side as the first guide base member (51) with respect to the first guide base member (6); 51) and the second guide base member (
each drive member (61, 62, and 63) that drives the drive member (61, 62, and 63)
, 64) for a magnetic recording/reproducing device, wherein the first guide base member (5
1) is driven by a second drive member (62) rotatably engaged with the first drive member (61), while the second guide base member (52) is driven by the first drive member (61) The fourth drive member (
64) A tape loading mechanism for a magnetic recording/reproducing apparatus characterized in that it is driven by a third drive member (63) connected to the first drive member (61) via a tape loading mechanism. 2. One end of the first guide base member (51) is locked to the second drive member (62), and the third drive member (63) of the second guide base member (52) is fixed to the second drive member (62). The tape loading mechanism for a magnetic recording/reproducing apparatus according to claim 1, further comprising a tension spring member (70) whose other end is locked to the fourth drive member (64). [Claim 3] Cylinder (6) equipped with a rotating magnetic head
A tape guide member (10, 11, 12, 13, 14, 15, 16, 17
, 18, 19) and the tape guide member (10, 11,
A first guide base member (51) on which one or more of the tape guide members (12, 13, 14, 15, 16, 17, 18, 19) is mounted; Tape guide members (10, 11, 12, 13, 14,
15, 16, 17, 18, 19), or a second guide base member (52) on which one or more tape guide members are mounted;
) and a driving member (61, 62, 63, 64) that drives the second guide base member (52), and the first guide base member (51) and the second guide base during tape loading or unloading operation. Component (52)
a first guide route (81) that guides both of the above, and a second guide route (82) that branches off from the first guide route (81) and guides only the first guide base member (51). )
, branching from the first guide route (81) and leading to the second guide route (81).
In the tape loading mechanism of a magnetic recording/reproducing device, the tape loading mechanism is provided with a third guide path (83) in which only the guide base member (52) is guided.
) and a third guide path (83) have different guide groove widths. 4. From the first guide route (81) to the third guide route (83) of the second guide base member (52).
4. The magnetic recording and reproducing apparatus according to claim 3, wherein a branching guide member (91) for guiding the branching operation to the branching point is arranged outside the movement locus of the first guide base member (51) near the branching point. tape loading mechanism.