JPH0644643A - Tape driving device - Google Patents

Abstract

PURPOSE:To make a mechanism and a whole device small in size and light in weight by reducing a flat area of a pedestal of a chassis and the like. CONSTITUTION:In chassis 1, a diagonal state external form section 1a is formed from the neighborhood of a tape guiding drum 2 to the neighborhood of a tape running driving means, and a tape running path of output side is formed along this diagonal state external section 1a. Also, the center of a capstan 7 and a pinch-roller 8 are arranged at opposite side to the tape guiding drum 2 with respect to a straight line Y-Y' which is perpendicular to a straight line X-X' passing through the center O, O' of reels 4, 5 and passes through the center O' of the reel 5. By using this constitution, a tape running path can be shortened, while the area of the chassis 1 can be reduced, especially, a tape path between a tape driving means such as the capstan 7 and an intake opening of a cassette 3 can be shortened, and friction of a tape 6 can drastically be reduced.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus using a tape such as a VTR as a recording medium, and more particularly to a tape drive apparatus suitable for miniaturization and weight reduction in a camera-integrated VTR or the like. Regarding 2. Description of the Related Art Conventionally, in a device such as a VTR, the main factors that govern the size of the mechanism are the tape guide drum size, the cassette size, and the loading mechanism that are systematically determined. This loading mechanism, for example,
In recent years, in order to support a VTR integrated camera such as a VHS-C cassette, a wide angle winding is required as a 4-head small-diameter drum system, so that a ring is becoming the mainstream. That is, a ring is arranged substantially concentrically around a tape guide drum containing a rotary head, a tape guide group is connected to the ring, and a ring (tape guide driving member) is rotated to perform loading / unloading of the tape. It is a thing. Such a ring system can easily handle wide-angle winding around a drum, as compared with the conventional arm system, and can also reduce the number of parts without requiring a complicated articulated arm. A base on which these mechanisms are mounted is usually formed in a rectangular shape. Related to this type of device, there is, for example, the structure described in JP-A-60-18848. [0003] In the above-mentioned prior art, sufficient consideration has not been given to reducing the size and weight of the mechanism. Since the chassis has a rectangular shape, the shape of the mechanism is unnecessarily large. Was becoming. On the other hand, the camera-integrated VTR, which is required to be small and lightweight, is configured not only to have a mechanism but also to have a circuit portion and a camera portion. Therefore, it is necessary to arrange them compactly as a whole. Therefore, if the mechanism that forms the main shape is rectangular, the camera-integrated VTR
This also affects the overall shape of the device, resulting in an increase in the size of the entire device and an increase in weight. An object of the present invention is to eliminate the disadvantages of the prior art and to reduce the size and weight of the mechanism and the size and weight of the device by reducing the plane area of the chassis. In order to achieve the above object, the present invention comprises a reel for feeding or winding a tape, and a tape running including a guide drum by a tape guide means on a base. In a tape drive device having a structure in which a path is formed and the tape is driven to be driven by a tape running drive means, the tape running drive means is characterized in that a center of a capstan is perpendicular to a straight line connecting the two reel axes, and With respect to the straight line passing through the axis of the reel on the winding side, it is arranged on the opposite side of the guide drum, and the base has a slanted outer shape in the direction from the guide drum side to the tape running drive means side. And the tape guide means is formed between the guide drum and the tape running drive means so as to form the tape running path in the vicinity of the slanted outer shape portion. It has a different configuration. The base supports at least the tape running path formed by the tape guide means including the guide drum. The guide drum guides the tape at its outer peripheral portion and records or reproduces a signal on the tape by a rotary head or the like. The reel supplies or winds the tape to the side of the tape running path. Further, since the tape running path is formed between the guide drum and the tape running driving means in the vicinity of the slanted outer shape portion, the tape running path can be formed short, and particularly, the center of the capstan. Is arranged as described above, the length of the tape path between the capstan and the pin of the tape take-in port of the cassette 3 is shortened, and accordingly, the bending at this tape path is reduced, and the tape 6 generated at this portion is reduced. Can significantly reduce the friction. An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view showing a loading completion state of a magnetic recording / reproducing apparatus using a tape drive apparatus of the present invention, wherein 1 is a chassis and 2 is a rotary magnetic head (not shown).
A tape guide drum 3 on which the tape 6 is wound obliquely at a predetermined angle, 3 is a cassette containing the tape 6 wound around the supply reel 4 and the take-up reel 5, and 7 is a motor 9 directly connected to the lower end. A capstan 8 is a pinch roller, 10 is an erasing head for erasing over the entire width of the tape 6, and 11 is an audio control head for recording and reproducing audio signals and control signals at the upper and lower ends of the tape 6. In FIG. 1, when the cassette 3 is mounted on the apparatus, the lid 12 on the front surface of the cassette 3 is opened, and the tension pin 16, the guide roller 17 and the tilt pin 18 are provided in the opening 13 of the cassette 3. The guide roller 19 and the inclined pin 20 are inserted into the opening 14 of the cassette 3, and the inclined pin 21 and the capstan 7 are inserted into the opening 15 of the cassette 3 at positions indicated by broken lines and solid lines, respectively. At this time, the pinch roller 8 is also in the position shown by the broken line. When the loading operation is performed, each guide moves while pulling out the tape 6. The guide roller 17 and the inclined pin 18 together constitute a first guide roller group, which are paired and horizontally moved to be positioned near the illustrated tape guide drum 2. Further, the guide roller 19 and the inclined pin 20 together constitute a second guide roller group, which, as a pair, move horizontally to the vicinity of the audio control head 11 and then move obliquely downward from there. The tape guide drum 2 is positioned in the vicinity. By positioning the first and second guide roller groups in this manner, the tape 6 is wound around the tape guide drum 2 by approximately 270 °. [0012] Here, the second positioned as described above.
The position of the guide roller group of the second guide roller group is set outside the chassis 1, so that the second guide roller group thus positioned can be arranged at a position lower than the surface of the chassis 1, and The height of the entire mechanism can be made lower than that of the arrangement on the upper side of the first structure. The tilted pin 21 is horizontally moved from the rear of the tilted pin 20 and fixed to the upstream side of the audio control head 11, whereby the attitude of the tape 6 is corrected and guided to the take-up reel 5. As a result of the above, the tape 3 is spirally wound around the tape guide drum 2 through the tension pin 16, the height regulation guide 22, the erasing head 10, the guide roller 17, and the inclined pin 18 from the cassette 3, and the guide roller is formed. 19, the inclined pin 20, the inclined pin 21, the fixed guide 23, the audio control head 11, the height regulation guide 24, the fixed guide 25, the portion held by the capstan 7 and the pinch roller 8, and the take-up reel 5 Tape 6
, A tape running path is formed. And
When the capstan 7 is rotationally driven, the tape 6
Runs on this tape running path. Here, the straight line connecting the center O of the supply reel 4 and the center O'of the take-up reel 5 is XX ', and the take-up reel 5 is shown.
A straight line passing through the center O'of the
Assuming Y ′, the centers of the capstan 7 and the pinch roller 8 are arranged on the side opposite to the tape guide drum 2 with respect to the straight line YY ′. As a result, the pinch portion of the tape 6 by the capstan 7 and the pinch roller 8 is set near the tape loading port of the cassette 3, so that the pinching portion of the tape 6 and the pin of the tape loading port of the cassette 3 are The tape path length between the two is shortened, and therefore, the bend in this tape path is reduced, and the friction of the tape 6 generated at this portion can be greatly reduced. The tape running path on the output side of the tape guide drum 2 is formed so as to extend along the tape guide drum 2 side as much as possible. For this reason, since a portion of the chassis 1 outside the tape running path on the output side becomes a complete space, the chassis 1 is provided with a tape guide drum 2 as shown in the drawing.
The motor 9, the capstan 7, the pinch roller 8 from the side
The slanted outer shape portion 1a is formed over the side in the vicinity of the tape running drive means, and the space portion is removed to reduce the area of the chassis 1. As a result, the size of the entire device can be reduced. FIG. 2 is a side view showing the state when the loading is completed, and FIG. 3 is a side view showing the state when the unloading is completed. The parts corresponding to those in FIG. 1 are designated by the same reference numerals. In FIG. 2, reference numeral 26 is a guide base, on which the guide roller 17 and the inclined pin 18 are planted, which is positioned and held by a catcher 28. Further, 27 is also a guide base, on which guide rollers 19 and inclined guides 20 are planted, and similarly positioned and held by a catcher 28. As shown in the figure, the tape guide on the output side of the tape guide drum 2 is lowered largely by the width of the tape as compared with the tape input side. As a result, the tape guide drum 2
The tape guide drum 2 can be arranged under the front lid 12 that opens to the front of the cassette 3 when the cassette 3 is mounted by reducing the inclination angle of the tape guide drum 2 and arranging the tape guide drum 2 at a position slightly lower than the cassette 3. We are trying to make it smaller and lighter. Now, the loading mechanism in the magnetic recording / reproducing apparatus shown in FIG. 1 will be described in detail. FIG. 4 is a perspective view showing a guide moving member on the exit side of the loading mechanism. In the same figure, the guide base 2 on which the guide roller 19 and the inclined pin 20 are set up
7 is rotatably supported in the plane by a connecting plate 29 as indicated by an arrow in the figure, and the connecting plate 29 is also rotatably connected in the plane by another arrow. Supported by 30. This connecting plate 30 is supported by one end of the output side drive member 31 so as to be swingable in the vertical direction, as indicated by another arrow. The delivery-side drive member 31 has an arc shape, and a gear portion 31a is provided on the outer periphery thereof. FIG. 5 is a perspective view showing a guide moving member on the entrance side of the loading mechanism. In the figure, a guide base 2 for arranging the guide roller 17 and the inclined pin 18
6 is a connecting plate 3 which is rotatable in a plane as shown by an arrow.
2, the connection plate 32 is supported by the entrance side drive member 3
A U-shaped portion 33b provided at one end of the shaft 3 is rotatably supported as indicated by another arrow. Delivery side drive member 31
Is inside the U-shaped portion 33b, that is, the entrance side drive member 33
Since it moves under the connecting plate 32 on the above, the two driving members do not collide with each other or the driving member and the guide group during the movement. The entry side drive member 33 is also arcuate in shape, and a gear portion 33a is provided on the outer periphery thereof. FIG. 6 is a perspective view showing the cam 34 of the loading mechanism. In the figure, the cam 34 is composed of two upper and lower stages, an upper stage has a gear portion 34a and a cam portion 34b from the left side, and a lower stage has a stopper surface 34b corresponding to a Geneva gear (described later) and a loading surface after loading. There are a cam portion 34c corresponding to the mode operation, a cam portion 34f corresponding to the middle of loading / unloading, and a cam portion 34e corresponding to the mode operation after the unloading, and the whole has an arc shape. These are arranged concentrically on the chassis 1 in the order of the outlet drive member 31, the inlet drive member 33, and the cam 34 from the top. FIG. 7 is a plan view showing a moving mechanism of the inclined pin 21 arranged on the exit side of the loading mechanism. In the figure, the gear portion of the support roller 67d engaged with the gear portion of the delivery side drive member 31 is also the gear 6
9 and engages with the gear 69,
The gear 70 that decelerates to 2 passes through the gears 71 and 72 and then the gear 73.
Connected to. Therefore, the rotation of the output side driving member 31 is transmitted to the gear 73 via these gears, and the gear 73 is rotationally driven thereby. At this time, the rotation is reduced to about 1/2 by the gears 69 and 70. The gear 73 is coaxially engaged with the arm 74 via a crimp spring (not shown), and moves the inclined pin 21 implanted at the tip of the arm 74 to a predetermined position defined by the catcher 75 and crimps it. To do. It should be noted that the tilt pin 21 is carried out at the above timing.
The tilting pin 21 is loaded following the guide base 27 by driving the. That is, since the movement loci of the inclined pin 21 and the guide base 27 partially overlap, when the guide base 27 precedes and passes the overlapping portion, the delivery side drive member 31 and the support roller 67d are engaged with each other. The position of the support roller 67d and the reduction ratio of the drive system of the arm 74 are set so as to drive the tilt pin 21. Therefore, since the movement of the arm 74 is controlled by the movement of the output side driving member 31, there is no interference at the overlap portion. Further, since the single output roller 67d supports the output side driving member 31 and transmits the driving force, the number of parts can be reduced. As described above, according to the present invention,
Since the friction of the running tape can be reduced and the flat area of the base on which each mechanical element of the mechanism is mounted can be minimized, the tape drive mechanism can be made compact and lightweight, and the entire device can be used. The size and weight can be easily reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a magnetic recording / reproducing device to which an embodiment of a tape drive device according to the present invention is applied. FIG. 2 is a side view showing a state of the magnetic recording / reproducing apparatus shown in FIG. 1 when loading is completed. 3 is a side view showing a state of the magnetic recording / reproducing apparatus shown in FIG. 1 during unloading. 4 is a perspective view showing an outlet tape guide driving member and a tape guide group of a loading mechanism in the magnetic recording / reproducing apparatus shown in FIG. 5 is a perspective view showing an entry side tape guide driving member and a tape guide group of the loading mechanism in the magnetic recording / reproducing apparatus shown in FIG. FIG. 6 is a perspective view showing a mode operation unit by a cam member of the loading mechanism in the magnetic recording / reproducing apparatus shown in FIG. 7 is a plan view showing an output side inclined pin drive mechanism of a loading mechanism in the magnetic recording / reproducing apparatus shown in FIG. [Explanation of reference numerals] 1 chassis 1a slanted outer shape 2 tape guide drum 3 cassette 4 supply reel 5 take-up reel 6 tape 7 capstan 8 pinch rollers 17, 19 guide rollers 18, 20, 21 inclined pins 26, 27 guide base 28 Catcher (Tape Guide Positioning Mechanism) 31 Outgoing Side (Second) Tape Guide Driving Member 33 Incoming Side (First) Tape Guide Driving Member 34 Cam Member

Claims (1)

[Claims] 1. A tape feeding path including a guide drum is formed on a base by a tape guide means including a reel on the tape supply side and a reel on the winding side, and the tape runs along the tape running path by the tape running drive means. In the tape drive device having a configuration for traveling drive, the tape traveling drive means is such that a center of the capstan is perpendicular to a straight line connecting the axes of the two reels and a straight line passing through the reel winding side. On the other hand, the base is provided on the opposite side of the guide drum, and the base has a slanted outer shape in the direction from the guide drum side to the tape running drive means side. A tape drive device, characterized in that the tape travel path is formed between the tape travel drive means and the oblique outer shape portion so as to be adjacent thereto. 2. The base is configured such that a start portion of the slanted outer shape portion is located closer to the guide drum between the guide drum and a center of a rotating portion of the tape running drive means. The tape drive device according to the first section. 3. The tape guide means includes a tape guide member provided on a tape ejecting side portion of the guide drum, which is near an outer peripheral surface of the guide drum, and is formed from one side of the base on which the start portion of the oblique outer shape portion is formed. The tape drive device according to claim 2, wherein the tape drive device is configured to be moved to the outside.