JPS5948461B2 - magnetic tape device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing device using a tape storage case housing a magnetic tape, such as a video tape recorder (hereinafter referred to as VTR), in which the magnetic tape is stored by a tape pull-out member. A simple configuration ensures the positioning of a tape pull-out member relative to the tape guide drum when the tape is pulled out from a housing and wound at a predetermined angle around a tape guide drum having a magnetic head and rotating at a constant speed to form a predetermined tape running path. The object of the present invention is to provide a magnetic tape device with stable performance that can be used for various purposes.

An embodiment of the present invention will be described below using a TR as an example with reference to the drawings.

FIG. 1 shows a plan view of the TR, and 1 is a board on which the main mechanical parts of the TR are attached. 2 indicates a force set attached to the VTR body, and the force set 2 is attached to the magnetic tape 4.
It has inside thereof a supply reel 3a and a take-up reel 3b, which are wound with magnetic tape 4 and passed around each other.

The force set 2 also has openings 5a, 5b and 5c cut into the inside of the magnetic tape 4 stretched between the internal guide posts 52a and 52b and between the guide posts 52b and 52d. Reference numeral 10 denotes a tape guide drum which is mounted inclined to the left with respect to the substrate 1 and records and reproduces a video signal onto and around which the magnetic tape 4 is helically wound at a predetermined angle in a desired recording/reproducing operation mode to be described later. It consists of an upper drum 10a that rotates at high speed and a lower drum 10b that is fixed.
It has a magnetic head (not shown) for recording and reproducing a video signal therein, and the magnetic head rotates integrally with the upper drum 10a.

Further, as shown by the two-dot chain line in FIG. 5, the portion of the tape guide drum 10 below the substrate 1 constitutes a bearing portion, and is thinner than the upper portion. Reference numeral 21 denotes a capstan for running the magnetic tape 4 at a constant speed by sandwiching the magnetic tape 4 with a pinch roller 20 in a reproduction or recording mode, and is configured to be located in the opening 5c when the force set 2 is attached to the TR main body. has been done.

51 is a magnetic head (hereinafter referred to as an AC head) for recording and reproducing audio signals and control signals on the magnetic tape 4, and as shown in FIG. Head support arm 4 rotatably supported
It is fixed to the bottom of 6.

A tape guide 50 is attached to the lower side of the head support arm 46 like the AC head 51, but its height relative to the substrate 1 can be adjusted.

47 is an engagement pin planted on the head support arm 46;
In order to engage with the engagement groove 48 of the connection lever 62, which will be described later,
As shown in FIG.
The head support arm 46 is biased counterclockwise by a tension spring 49 stretched between the head support arm 46 and the head support arm 46.

That is, the AC head 51 is urged in a direction away from the tape guide drum 10. Reference numeral 23 denotes an erasing head, which is fixed on an erasing head arm 24 rotatably supported by an erasing head arm support shaft 25 set up on the substrate 1, as shown in FIG.

Reference numeral 26 denotes a press engagement pin, which is erected at the end of the erasing head arm 24 toward the substrate 1.
A tension spring 27 is stretched between the tape and the spring hanging pin 66 set on the substrate 1, and biases the erasing head arm 24 in the counterclockwise direction, that is, the erasing head 23 away from the tape guide drum 10. Furthermore, the lower end of the press engagement pin 26 is brought into contact with a cam surface 28 provided on a recording lever 31, which will be described later.

70a and 70b are tape pull-out members, and as shown in FIG. 1, before the magnetic tape 4 is pulled out, the openings 5a,
5b, and from the first position where the magnetic tape 4 is stored in the force set 2, the magnetic tape 4 is wound at a predetermined angle around the tape guide drum 10 as shown in FIGS. It is brought to a second position where a running path is formed.

Here, the structure of the tape loading means for bringing the magnetic tape 4 from the first position to the second position will be explained in some detail. First, the tape pull-out members 10a, 70b are connected to tape pull-out plates 6a, 6b, tape pull-out tape guides 7A, 7b, and tape pull-out pins 8a, 8b set up on the tape pull-out plates 6a, 6b, as shown in FIG. , These tape pull-out tape guides 7A
, 7bl tape pull-out pins 8a, 8b and engaging pins 12a, 12b planted on the opposite side. The right tape pull-out member 70b is placed so as to be slidable on the plate 13 along the guide groove 14a, and the engagement pin 12b of the right tape pull-out member 70b similarly engages with the guide groove 14b so that the right tape pull-out member 70b slides on the guide plate 13 along the guide groove 14b. It is slidably mounted. Further, as shown in FIGS. 1, 4, and 5, 11a is an upper tape loading ring, and 11b is a lower tape loading link, which are arranged coaxially with each other, and a part of the outer periphery is shaped like a gear. It is supported at three locations on the outer periphery by guide rollers 18a, 18b, and 18c so as to be rotatable around the guide drum 10. Further, the tape loading rings 11a and 11b are shown in FIGS.
As shown in FIG. 10, it is rotated by a rotary operation means centered around a drive gear that meshes with the outer peripheral gear. A loading knob 80 is integrally fixed to the end of a loading shaft 81 that is rotatably supported parallel to the substrate 1 by a support plate A 82 and a support plate B 83 attached to the substrate 1.

A screw gear A 84 is fixed to the other end of the loading shaft 81, rotates integrally with the loading shaft 81, and meshes with the screw gear B85.

As shown in FIG. 10, the screw gear B85 is rotatably supported by a bearing A96 fixed to the base plate 1, and is fitted with a D cut on the upper part of the shaft 86. A spur gear A8T is fixed to the lower end of the shaft 86 with screws or the like, and meshes with a spur gear B9O fixed to the lower end of the shaft 89, which is rotatably supported by a bearing B9T fixed to the base plate 1. axis 8
A spur gear C88 is fixed to the upper part of the upper loading ring 11a by D-cut fitting.
meshes with the outer gear. Reference numeral 91 denotes a spur gear D which meshes with the outer peripheral gear of the upper loading ring 11a and also meshes with the spur gear E93, and is rotatably supported by a support shaft 92 planted on the base plate 1.

Further, the spur gear E93 is integrally molded coaxially with the spur gear F94, and is rotatably supported by a support shaft 95 planted on the base plate 1, and the spur gear F94 meshes with the lower loading ring 11b. There is. Next, the structure of the detent means for positioning the rotation operation means will be explained.

In FIG. T and FIG. 8, 100 indicates detent means. Reference numeral 101 denotes a detent plate, which has a substantially circular shape and has V-shaped notches 105a and 105b on its outer periphery, and is fixed so as to rotate together with the loading shaft 81.

Further, the detent plate 102 is supported by a hole IOT provided in a bent portion 106 of the support plate 82 so as to fall into the notches 105a, 105b, and is supported by a leaf spring 103 fixed to the bent portion 106 with a screw 104. 101 is a pole that is biased toward the center. Further, the loading knob 80 is connected to the detent plate 1.
The ball 102 can rotate from a position where it falls into the notch 105b of No. 01 to a position where it falls into the notch 105b. Now tape loading ring I
The configuration of la and llb will be explained.

As shown in Figure 4, the upper tape loading ring Il
a has guide pins 16a, 16a' and a spring hook pin 59.
a is planted, and the upper tape loading ring Ila
A slide member 63a, which has a guide groove 15a that fits into the guide pins 16a, 16a' and is slidable in the circumferential direction of the outer gear portion, is placed on the top so that it fits into the guide pins 16a, 16a'. , a tension spring 58a is stretched between the slide member 63a and the spring hanging pin 59a,
The slide member 63a is biased in the direction A, which is the tape loading direction, as will be described later. Similarly, the guide pins 16b and 1 are attached to the lower tape loading ring Ilb.
6b' and a spring hanging pin 59b are installed, and the guide pin 16 is installed on the lower tape loading ring 11b.
A slide member 63b, which has a guide groove 15b that fits into the side pins 16b and 16b' and is slidable in the circumferential direction of the outer gear portion, is placed so as to fit into the side pins 16b and 16d. A tension spring 58b is stretched around the hanging pin 59b, and the slide member 63b is biased in the B direction. Furthermore, the slide members 63a, 63
b is bent into a U-shape, and there is an engagement groove 1T on the top surface.
a, I1b are open. Figure 1 shows the above information board 1.
3 is omitted, but as shown by the two-dot chain line in FIG. Above that is the upper tape loading ring Ila, above that is the guide plate 13, and as shown by the dashed line in FIG.
The engagement pin 12a is located in the engagement groove 1 of the lower slide member 63b.
Similarly, the engagement pin 12b of the right tape pull-out member TOb passes through the guide groove 14b of the guide plate 13 and engages with the engagement groove 1Ta of the upper slide member 63a. are engaged. 1 to 3 and FIG. 5, 9a and 9b are positioning members, and when the tape pull-out members TOa and TOb pull out the magnetic tape 4 along the guide grooves 14a and 14b of the guide plate 13, As shown in FIGS. 2 and 3, the tape pull-out tape guide 7A of the tape pull-out members TOa, TOb,
V that determines the position of Tb with respect to the tape guide drum 10
It has shape receiving grooves 9a' and 9d.

In addition, in FIGS. 1 to 3, 30 is a reproduction lever, 31
is a recording lever provided under the reproduction lever 30,
Reference numeral 32 denotes stop levers, and these levers are placed parallel to the substrate 1 so as to be slidable in the vertical direction in the figure.Tension springs 55 and 56 are stretched between the respective levers and the substrate 1. , 57, it is constantly biased downward in the figure. Reference numeral 33 designates a reproducing lock pin that is installed on the reproducing lever 30, 34 represents a recording lock pin that is installed on the recording lever 31, and 35 represents a stop pressing pin that is installed on the stop lever 32. Furthermore, the playback lever 30 and the recording lever 3
1. On the stop lever 32, there is a lock plate 36 which is placed so as to be slidable in the horizontal direction with respect to the board 1 in the figure, and the lock plate 36 has a tension spring 29 stretched between it and the board 1.
The lock plate 36 has locking grooves 64, 6 that penetrate and engage the reproducing lock pin 33, recording lock pin 34, and stop pressing pin 35, respectively.
5 and a pressing surface 67. As shown in FIGS. 1 to 3 and 5, a pressing pin 37 is installed at the tip of the reproduction lever 30 so as to pass through a hole 61 made in the substrate 1. As shown in FIGS.

Reference numeral 38 denotes a direction change lever that is rotatably supported on a rotation shaft 40 installed on the back side of the substrate 1, and is connected to the pressing pin 3.
An engagement groove 39 that engages with the connecting lever 62 is provided, and an engagement pin 41 is planted so that the engagement pin 41 engages with an engagement groove 42 formed in the connecting lever 62.

Further, guide grooves 44a and 44b are formed in the connecting lever 62, and guide pins 43a and 44b are installed on the back side of the substrate 1.
43b penetrates and slides along the guide pins 43a, 43b in parallel to the substrate 1 and in the left-right direction in FIG. Further, as described above, the engagement pin 47, which is integrally planted on the head support arm 46, engages with the engagement groove 48 provided at the end of the connection lever 62. Next, the main operations of this apparatus configured as described above will be explained.

First, from the first position shown in FIG. 1 before the magnetic tape 4 is pulled out from the force set 2, the magnetic tape 4 shown in FIGS. 2 and 3 is pulled out from the force set 2 to the second position,
A tape loading operation for forming a predetermined tape running path by wrapping the tape around the tape guide drum 10 at a predetermined angle will be described. Manually rotate the loading knob 80 shown in FIG. 7 clockwise. Since screw gear A84 and screw gear B85 have their teeth twisted in the left direction, screw gear B85 and spur gear A87 rotate counterclockwise, and spur gear B9O and spur gear C88 rotate clockwise. Therefore, the upper tape loading ring 11a meshing with the spur gear C88 rotates counterclockwise (direction A in FIGS. 1 and 4). Also, the upper tape loading ring 11
The spur gear D9l meshing with the spur gear D9l is rotated clockwise, and the spur gear E93 meshing with the spur gear D9l and the spur gear F94 integral with the spur gear E93 are rotated counterclockwise. Therefore, the lower loading ring 11b meshing with the spur gear F94 is rotated clockwise (direction B in FIGS. 1 and 4). In other words, the rotational force transmission path is loading knob 80→screw gear A84→screw gear B85→spur gear A87→spur gear B9O→spur gear C88→
Upper tape loading ring 11a→Spur gear D9l→
Spur gear E93→spur gear F94→lower tape loading ring 11b. By rotating the tape loading rings 11a and 11b in this way, the tape pulling member 70a placed on the guide plate 13
, 70b are tape loading rings 11a, 11b
Tape loading rings 11a and 11b are placed on the tape loading rings 11a and 11b.
The engaging pins 12a, 12b engage with the engaging grooves 17a, 17b of the slide members 63a, 63b that rotate integrally with the slide members 63a, 63b, thereby moving the guide grooves 14a, 14b along the guide grooves 14a, 14b of the guide plate 13. Move as a route. The right side tape pull-out member 70a pulls out the tape from the right side tape pull-out opening 5b of force set 2 and the tape guide 7b.
The right positioning member 9b0 moves until it comes into contact with the V-shaped receiving groove 9b', and the magnetic tape 4 is pulled out. Similarly, the left side tape drawer member. The tape pull-out tape guide 7a moves from the left tape pull-out opening 5a of the force set 2 until it comes into contact with the V-shaped receiving groove 9a' of the left positioning member 9a, and the magnetic tape 4 is pulled out. In addition, the left and right tape pull-out tape guides 7A, 7b are shaped into grooves 9a', 9.
After contacting the tape loading ring 11a, the tape loading ring 11a
, 11b are rotated until the ball 102 of the detent means 100 falls into the notch 105a, but the slide members 63a, 63b engaged with the tape pull-out members 70a, 70b by the engagement pins 12a, 12b are the tape pull-out members TOa, 11b. Since TOb is in contact with the V-shaped receiving groove, it cannot be rotated, and the rotation of the tape loading rings Ila, Ilb is controlled by a tension spring 58a stretched between the tape loading rings Ila, Ilb and the slide members 63a, 63b.
, 58b, and the force due to this elongation causes the tape pull-out tape guides Ta, TTb to move into the V-shaped receiving groove 9.
Tape is pressed on a', 9d The tape loading operation is completed. However, the tension springs 58a and 58b are stretched,
Tape pull-out tape guides Ta and Tb are placed in V-shaped receiving groove 9
The reaction force applied to a' and 9b' naturally tries to rotate the tape loading ring Ila clockwise and the lower tape loading ring Ilb counterclockwise, so the configuration of the rotation operating means As is also clear, the loading shaft 81 in FIG. T attempts to rotate counterclockwise. However, by biasing the detent means as described above, the ball 10 can be placed in the notch 105a of the detent plate 101.
2 by the leaf spring 103, the loading shaft 81 is prevented from rotating counterclockwise, and the positions of the tape guides Ta and Tb are stably determined. Next, I will explain the regeneration movement.

As shown in FIG. 2, when the playback lever 30 is pushed in after the tape loading operation is completed, the pressing pin 3T at the tip of the playback lever 30 is moved to the direction change lever 38.
is rotated in the C direction, the engagement pin 41 moves the connection lever 62 in the D direction, and the engagement groove 48 of the connection lever 62 is rotated.
By pulling the engaging pin 4T engaged in the direction D,
The head support arm 46 supporting the C head 51 is rotated in the E direction, and the AC head 51 and tape guide 50 are brought into contact with the magnetic tape 4 and moved to a predetermined position where an appropriate wrapping angle can be obtained. . Further, although not shown, a detection member such as a micro switch is provided to detect the movement of the reproducing lever 30, thereby attracting the plunger and bringing the pinch roller 20 into contact with the carburetor stan 21. At the same time, the take-up reel 3b is rotated to wind up the magnetic tape, and an electric circuit (not shown) is actuated to cause the magnetic head of the tape guide drum 10 and the AC head 5 to rotate the magnetic tape. A reproducing operation can be realized by reproducing the signal recorded on 4.

This movement mode is released when the regeneration lock pin 33 of the regeneration lever 30 is retained by the locking groove 64 of the lock plate 36 and pushes the bill stop lever 32 to slide the lock plate 36 to the right. Next, the recording operation will be explained.

As shown in FIG. 3, the tape traveling path during the recording operation is the same as the reproducing operation except that the erasing head 23 is in contact with the magnetic tape 4. Now, the recording operation can be realized by pushing the play lever 30 and the record lever 31 at the same time. The operation of the regeneration lever 30 is the same as that described in the regeneration operation. Record lever 3
1, the pressing engagement pin 26 is pushed to the left by the cam surface 28, the erasing head arm 24 rotates in the F direction, the erasing head 23 comes into contact with the magnetic tape 4, and an appropriate wrapping angle is obtained. At the same time, although not shown, a detection member such as a micro switch is provided to
The signal recorded on the magnetic tape 4 is erased by the erasing head 23, and the signal is erased by the magnetic head of the tape guide drum 10 and the AC head 51. Records can be realized by recording. In this movement mode, the playback lock pin 33 of the playback lever 30 and the record lock pin 34 of the record lever 31 are connected to the lock plate 3, as in the case of the playback movement.
The card is held by the locking grooves 64 and 65 of No. 6, and is released by pushing the bill stop lever 32 and sliding the lock plate 36 to the right. According to the present invention, VTR
As described above as an example, the present invention provides a tape storage case in which a magnetic tape is wound around a tape guide drum at a predetermined angle from a first position stored in a tape storage case to form a predetermined tape running path. a tape pull-out means for pulling out the tape to the second position; a positioning member for determining the second position of the tape pull-out means; a loading ring rotatable in a first direction and a second direction; and rotating the loading ring. A tension spring is stretched between a rotary manipulating means, a detent means for determining the position of the rotary manipulating means, and a loading ring that is slidably placed on the loading a predetermined distance, and the tape is a slide member engaged with the pull-out means, the tape pull-out means is brought to the positioning member by rotation of the loading ring, and further pressed against the positioning member by the tension spring;
Since the final rotational position of the loading ring is determined by the detent means, the pulled-out magnetic tape can be reliably positioned with an extremely simple configuration, and stable performance can therefore be obtained. In particular, it can be used for manual tape loading to provide a highly effective and inexpensive device.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a schematic plan view of the magnetic recording/reproducing device before taking out the tape, FIG. 2 is a schematic plan view of the magnetic recording/reproducing device in a reproducing operation mode, and FIG. A schematic plan view of the recording operation mode of the magnetic recording/reproducing device, FIG. 4 is a perspective view of the tape pull-out member and related mechanisms, FIG. 5 is a cross-sectional view of FIG. 1, and FIG. 6 is a right side view of the AC head. , FIG. 7 is a plan view of the tape loading means and detent means showing the main parts of the present invention;
8 is a front view of the detent means, FIG. 9 is a side view of the drive gear of the lower tape loading ring, and FIG. 10 is a sectional side view of the drive gear of the upper tape loading ring. 2...Force setting, 4...Magnetic tape,
10...Tape guide drum, 11a, 11b
...Tape loading ring, 13...
...Guidance plate, 70a, 70b...Tape pull-out member, 80...Loading knob, 84,
85... Screw gear, 87, 88, 90, 91,
93, 94... Spur gear, 101... Detent plate, 102... Ball.

Claims (1)

[Scope of Claims] 1. A magnetic tape is pulled out from a tape storage case, is wound at a predetermined angle around a tape guide drum that has at least one magnetic head and rotates at a constant speed, and runs along a predetermined tape running path. The device records or reproduces a signal by pulling out the magnetic tape from a first position stored in the tape storage case to a second position where the magnetic tape is wound around the tape guide drum at a predetermined angle, A first loading ring rotatable in a first direction to form a running path, a second loading ring rotatable in a second direction, and the first loading ring and the second loading ring are respectively rotated in the first direction. and a rotation operation means for rotating the rotation operation means in a second direction; a detent means for positioning the rotation operation means; , a slide member having a tension spring stretched between each loading ring; and a slide member that engages with the slide member and rotates together with the first loading ring and the second loading ring to move the magnetic tape into the tape storage case. The tape pull-out member is provided with a tape pull-out member that is pulled out from the body, and a positioning member that determines the second position of the tape pull-out member, and the first loading ring and the second loading ring are moved to the respective first positions by operation of the rotation operating means. and a second direction, the tape pulling means is brought into contact with the positioning member, and the first loading ring and the second loading ring are further rotated to cause the tension spring to cause the tape pulling member to come into contact with the positioning member. is pressed against the positioning member, and the final rotational positions of the first loading ring and the second loading ring are determined by the detent means. 2. The detent means has a rotary plate integrally provided with the rotary operation means, a notch is provided on the outer circumference of the rotary plate, and the notch is biased toward the center of rotation of the rotary plate by an elastic member. 2. A magnetic tape device according to claim 1, wherein the final rotational positions of said first loading ring and said second loading ring are determined by the falling of said ball or roller.