JPS6154068A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To use common by a travelling system to a two-way system tape cassette by driving and changing two gradient guides in angle provided on an inlet or outlet of a tape guide drum and altering a tape travelling angle of the inlet or outlet part. CONSTITUTION:After tape guide 23, 24 delivered from the different two-way system cassette supply reel 3 or 5 travels the common routes of guides 144, 145, a tape 23 is taken up by a drum 70 at an incident angle of 5 deg. and a tape 24 is taken up at an incident angle of 5.94 deg. by the drum 70 through gradient guides 148, 149 and a vertical guide 150 route. For the tape 24, the height of taking in the drum, i.e. the incident angle is controlled by the gradient guides 148, 149. In addition, at use of the tape 23, guides 148-150 are fallen at their sides and made out of use, and at use of the tape 24, the guides 148-150 stand upright and are on use to make possible the common use of the tape travelling system against the different two-way system tape cassette.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a magnetic recording/reproducing device.

[Conventional technology]

In the current consumer video tape recorders (hereinafter abbreviated as VTR), βmax (registered trademark) and VH3
There is a conflict between the two types of VTRs, and there is no compatibility between the two types of VTRs.

By the way, both types of VTRs use tape cassettes,
A magnetic tape is pulled out from a tape cassette and wrapped around a tape guide drum at an angle of approximately 180°, and a pair of rotating magnetic tapes arranged at an angle of 180° are provided on the tape guide drum. The head modulates and records a video signal on the magnetic tape so as to form a diagonal track (tJi), and the rotating magnetic head scans the diagonal track to reproduce the modulated video signal. So the trajectory is set to -.

However, the structure and dimensions of the tape cassette, the dimensions and lead angle of the tape guide drum, the relative speed between the magnetic tape and the rotating magnetic head, the loading method of winding the tape pulled out from the tape cassette around the tape guide drum, the recording of the tape, etc. There are various differences in patterns, signal processing methods in recording and reproducing systems, etc.

First, the differences in size, shape, and function of both types of tape cassettes will be explained with reference to FIGS. 1 and 2. In FIGS. 1 and 2, (1) indicates a β-max tape cassette (hereinafter abbreviated as β-cassette), (la),
(lb) is on both sides, and (2) is a VHS tape cassette (hereinafter abbreviated as VHS cassette).
(2a) and (2b) respectively show both sides thereof, FIG. 1 is a perspective bottom view of the cassettes (1) and (21), and FIG. 2 is a side view of each short side thereof.

+3), +41 are the β supply and take-up reels and the interval is 11, (51, +61 are the VH3 supply and take-up reels and the interval is !2, then Ilx (=9
2 fins) R2 (=76 dragons), the difference 12-It1 is la
(=16 cranes). '4+lG is β cassette l-(
Each width of ll.

Depth, 6s, and IT are the respective widths of VH3 force/set (2).

The depth is l 4 (= 156 dragons) < 1s.
(-1B8 dragon), As (=96 cranes) < It t
(= 104 wow), and β cassette (1
) is smaller than the VHS cassette (2).

In addition, β and VHS cassettes (11, <21 thickness Re
(=25fi) are equal.

β and VHS cassettes) (1) and +21 both have a β tape (23) and a VHS
Opposing the tape (24) is a lid (7) with a substantially U-shaped cross section.
.

(8) are provided respectively, and β provided on both sides of each
Bin (91, VHS Bin α [By β Cassette (1)
, VHS cassette (21 is pivotally attached to the main body, and the opening on the tape side of each main body is opened and closed by these M[7), +8). These lids (?) and (8) are elastically biased counterclockwise in FIG. 2 by built-in return springs (not shown) so that they are closed when not in use. Also, when these lids +7) and (8) are in the closed state, there is a mechanism that locks the state, and β and the VHS reel (3).

(4) ; (51, (The mechanism for locking the rotation of 61 (both not shown) is β and VHS cassette (1)
, +2) respectively.

Each of these cassettes (11, (21) has a large symmetrical trapezoidal β notch (1
1) and a small asymmetrical trapezoidal V HS notch (12
) is provided.

However, as can be seen from Figure 1, both force sets (11,
+2) on its front side, and both supply reels (3).

When superimposed so that each axis of (5) coincides,
The VH3 notch (12) comes approximately at the center of the β notch (11).

On the bottom surfaces of both cassettes L-(11, +21), a pair of β through holes (13) and (14) into which a pair of positioning pins on the VTR side are inserted, respectively, and a pair of VHS through holes are provided on the front side. Holes (15) and (16) are bored, but their positions and intervals are different from each other.

The bottom of the β cassette l-(1) has a pair of slit-like notches (17 ), (1B) are provided.

Note that one notch (17) is cut into a part of the lower end of the β lid 7).

A slit-shaped cutout (19) into which a VHSM raising plate of a VTR is inserted is provided on the bottom of the VHS cassette (2) at a position biased to the side.

In addition, in the overlapping state of the above-mentioned double force sets (1) and +2), the β notch (18) and the Vf (S notch (
19) The distance between 1i11t l s is 9 cranes.

A protrusion (20) for unlocking the lid is provided on one side (2b) of the VHS cassette (2) at a position biased toward the front side.

The bottom of the VHS cassette (21) has a pair of insertion holes (21) in which the VTR's tape end sensor light source and reel lock release bin are inserted, respectively, at two locations in the front and back approximately in the center of the VHS cassette (21).
1) and (22) are provided.

Next, the conventional β-VTR, VH3-VTR (7) tape guide drum, tape running system, and loading of the tape onto the tape guide drum will be explained. First, β−
The VTR will be explained with reference to FIGS. 3 to 5. 3 and 4 show a state in which the magnetic tape is loaded onto the tape guide drum (U loading), and these figures will be explained below. (30) is the tape guide drum (74.487 mm in diameter), and the fixed upper drum (31)
, a fixed lower drum (32) and an intermediate rotating disk (
33), and a pair of rotating magnetic heads (3311) are attached to the rotating disk (33) so as to face the outside. Tape (23) is attached to the lower drum (32).
) in contact with the lower edge of the inclined lead guide (the lead angle is 5
°) is provided. A loading ring (34) is rotatably arranged around the drum (30), and both are spaced apart from each other. On the ring (34) is a rotation guide (35).
) to (37) and a pinch roller (38) are provided. Of these, the guide (35) is for drawing out the tape. The guides (35), (36) are planted directly on the ring (34). The guide (37) is a ring (34)
A pair of mutually rotating connecting arms (39
), (40) is planted at the free end of one arm (40). The guide (37) is guided by the long groove (notch) (41a) of the guide groove plate (41).

The pinch roller (38) is installed at the free end of an arm (42) rotatably supported on the ring (34).

(43) is a tension regulator arm, which is rotatably supported by a fixed part, and has a pin (guide) (4) at its free end.
3a) is planted. (44) is a full width erase head;
(45) is a sound/control head, (46) is a sound erasing head, and (47) is a capstan, all of which are provided on the fixed part.

Next, as shown in FIG. 3, FIG. 4, and FIG. 5C, the tape running path when the tape (23) is wound around the drum (30) will be described. The tape (23) fed out from the supply reel (3) passes through the guide in the cassette (1), and then passes through the pin (43a) of the tension regulator arm (43) and the erase head (44) to the drum. (30) (corner with S is 188°),
Then erase head (46) - audio/control head (45) - capstan (47) and pinch roller (3)
8) Between - Tape drawer guide (35) - Guide (36)
- It passes through the path of the guide (37) and is wound onto the winding reel (4) after passing through the guide in the cassette (1).

In Figure 4, the ring (34) rotates in the counterclockwise direction α during loading, and clockwise β during unloading.
Rotate to. γ indicates the running direction of the tape (23), and δ indicates the rotation direction of the rotating disk (33).

Figure 5 A-C shows tape (23) against drum (30)
As originally shown in Figure 5A, there are guides (35), (36), (37) and pinch rollers (38) inside the tape (23) on the front of the cassette (1). As the ring (34) rotates in the counterclockwise direction α, the tape (23) is pulled out by the guide (35), as shown in FIG. 5B.
) begins to be wound around the drum (30), and finally, as shown in Fig. 5C.
As shown in FIGS. 3 and 4, the winding of the tape (23) around the drum (30) is completed, and the tape (23) is wrapped around the drum (30).
3) is the capstan (47) and pinch roller (38)
It is clamped and driven to run at a constant speed.

The characteristic of loading tape onto the tape guide drum of β-VTR is that the tape is pulled out from the tape cassette and wound to the opposite side of the tape cassette with respect to the diameter of the tape guide drum parallel to the front surface of the tape cassette. be.

Next, referring to FIG. 6, the VH3-VTR will be explained. Figure 6 shows the state in which the magnetic tape is loaded onto the tape guide drum (M loading).
) is a tape guide drum (62 m in diameter) (β drum (3
0), and the rotating upper drum (51
), attached to a fixed lower drum (52) and a rotating upper drum (51), both drums (51).

(52) and a rotating magnetic head (53) mounted on the lower rotating drum (52) so as to be exposed to the outside.
It consists of Tape (24) on the lower drum (52)
An inclined lead guide that contacts the lower edge of the (lead angle is 5.
94°) is provided. (54) to (60) are guides, of which (55) is a back tension post guide, and (56) to (59) are moving guides for tape drawer/tape loading. The tape (24) is pulled out and loaded onto the drum (50). Of the movement guides (56) to (59), (57
), (5B) is the drum (5) of the magnetic tape (24).
The wrap around 0) is a tilted guide that determines the angle.
(63) and (64) are impedance rollers, which are respectively guided (56) via the tape (24).

(59).

(62) is a full-width erase head, (65) is an audio erase head, and (66) is an audio/control head.

(61) is the capstan, (67) is the pinch roller,
The tape (24) is held between these and driven at a constant speed.

Next, the tape running path when the tape (24) is wound around the drum (50) will be explained. Supply reel (5)
The tape (24) fed out from the cassette (2) passes through the guide (54)-guy)' (5
5) - Erasing head (62) - Impedance roller (6)
3) Wound around the drum (50) through the path of - guide (56) - guide (57) (winding angle is 157°)
, furthermore, a guide (58) - a guide (59) - an impedance roller (64) - an erasing head (65) - an audio/control head (66) - a guide (60) - a capstan (61) and a pinch roller (67). After passing through a guide in a cassette (2), it is wound onto a take-up reel (6). In addition, δ is the rotation direction of the rotating upper drum (51) (
(counterclockwise), T indicates the tape running direction.

As mentioned above, there are various differences between β-max type and Vr+s type VTRs in the structure and dimensions of the tape cassette, the structure and dimensions of the tape guide drum, and the method of loading the tape onto the tape guide drum. Although there are many, there is no possibility of commonality.

Therefore, a VTR for both the β system and the VH3 system, which can use tape cassettes, was published by the applicant in Japanese Patent Application Laid-Open No. 56-119916,
This is proposed in Publication No. 7, etc. This VTR stacks a VH3-type tape guide drum on a β-type tape guide drum, and by moving both drums up and down, the
and VHS mode switching.

[Problem that the invention seeks to solve]

In addition to the troublesome work of removing and installing the VHS drum when replacing the rotating magnetic head of the β system and the time required to reinstall the drum after replacing the head, such VTRs also require the tape guide drum. There is a disadvantage that the thickness of the device becomes large due to the large amount of space involved.

In view of these points, the present invention has a tape guide drum that has a simple structure, can reduce its height, and can change the tape running angle at the tape entrance or exit of the tape guide drum.
The present invention is intended to propose a magnetic recording/reproducing apparatus in which most of the tape running system can be shared, and tape cassettes of two different types of magnetic recording/reproducing apparatuses can be used.

[Means for solving problems]

In the present invention, the tape cassette (11, (21 to tape (23), <24) is pulled out and the rotating head H
A tape cassette (1) with a tape guide drum (70) with a size of 8.

(2) Wrapping approximately 180° to the opposite side of tape casing 7) 11° with respect to the diameter parallel to the front surface of (2) is a tape guide in a magnetic recording/reproducing device that winds at an angle. The tape is wound around the tape entry or exit part of the drum (70) using two 1-axis oblique guides (148) for corner regulation.

(149) and two inclined guides (148).
).

(149) is provided with a driving means for raising and lowering it depending on the use state and non-use state, and two inclined guides <148).

The present invention is characterized in that the tape traveling angle at the entrance or exit of the tape guide drum (70) is changed depending on whether the drum (149) is in use or not.

[Effect]

According to the present invention, depending on which of the two types of tape cassettes of the magnetic recording/reproducing device is used, there are two tape windings provided at the tape entry section or the exit section of the tape guide drum for corner regulation. (The tape running angle can be changed by undulating the diagonal guide, and the tape running system for the tape in the tape cassette of two types of magnetic recording and reproducing devices can be changed by using a tape guide drum with a simple configuration and small height. Most of it can be shared.

〔Example〕

An embodiment of the present invention will be described in detail with reference to FIG. 7 and subsequent figures. First, the tape guide drum device will be explained with reference to FIGS. 7 to 12 (mainly FIGS. 7 and 8). (69) shows the tape guide drum device as a whole. (70) shows the tape guide drum, (71) is the rotating upper drum ((7E) is its drive motor), (72)
is a fixed lower drum, and its root diameter is selected to be 74.48'bm, which is the same as the drum diameter of the β method. As shown in Fig. 8, on one half of the fixed lower drum (72) there is a β oblique lead guide (73) with a lead angle of 5.94°, and on the other half of the fixed lower drum (72) there is a lead guide (73) with a lead angle of 5.94°. +1+1 diagonal lead guides (74) for VH3 are formed respectively, β mode, VHS
The fixed lower drum is rotated approximately half a turn in both the positive and negative directions according to the mode, and the (lit diagonal lead guide of each mode is
It is positioned to the left in the figure. Note that the lead guide may not be provided directly on the drum, but may be provided separately around the drum. In Figure 7, H is a drum (7
A rotating magnetic head is attached to a drum (71) so as to face the outside between 1) and (72).

FIG. 8 illustrates the β mode state of the tape guide drum device (69), in which the tape (23) of the β cassette (1) is guided by the β area lead guide (73). ), (72) is wound diagonally.

Furthermore, in this tape guide drum device i (69), the axes AXβ and tVt of AXv in the β mode and the VIS mode of the drum (70) are connected to the tape outlet (inlet) of the drum (70). ) through the center P of the tape width,
β and VH around an axis perpendicular to the axis of the drum (70)
Angle α° corresponding to the difference in tape lead angle of 3 (uniform 1°
), and the tapes (23) in both modes exit the tape outlet of the drum (70).

The running angles of (24) are made to be equal.

(75) is a cylindrical base body to which a fixed lower drum (72) is attached by screwing, and a flange (75a) at the lower end thereof.
A large gear (76) is attached to the.

(77) is a cylindrical base, around which is a bearing (78).
), the above-mentioned cylindrical base (75) via (79)
is rotatably mounted. (80) is a substrate whose bottom surface is a cylindrical convex surface and which can swing in the circumferential direction;
(81) is a pedestal with a cylindrical concave upper surface, and receives the substrate (80) via four rollers (82) arranged at each corner of a rectangle. This pedestal (81) is a board (83)
fixed on top. (84).

Reference numerals (85) are regulating plates that regulate the swinging of the board (80), and are fixed to both sides of the pedestal (81). (86).

(87) is a tension spring stretched between the substrate (80) and the pedestal (82), and is elastic so as to press the substrate (80) against the roller (82) along a line symmetrical direction passing through the center P. It's biased. (88) is another tension spring stretched between the base plate (80) and the pedestal (82), which biases the base plate (80) counterclockwise in FIG.

(89) is an upper extension board extending from the board (80), on which 11 wheel pillars (92) having upper and lower gears (90) and (91) are rotatably supported by a shaft (93). has been done. An F section extension board (94) is attached to the lower side of this upper extension board (89), and this lower extension J+11
1i (94) double bent portions (94a), (94
b) Teeth in between! ! Worm (95) meshing with (91)
) and the motor that drives it (DC motor”) (9
6) is installed so that it is stretched across.

Thus, the gear (91) is rotated by the worm (95) being rotationally driven by the motor (96).

The gear (76) is rotated via the gear (90), thereby moving the drums (71) and (72) to the substrate (75).
At the same time, it is rotated approximately half a rotation around the base (77) in both positive and negative directions.

Next, about the driving means for swinging the substrate (80), the seventh
This will be explained with reference to FIGS. (100) is a plunger that holds the board (8) with the fixture (101) (see Figure 7).
3) Mounted on top. (100a) is the operating rod of the plunger (100). (102) is the substrate (83)
It is a roughly U-shaped frame attached to the frame, with shafts (
103) is handed over.

By this shaft (103), a thin plate-shaped arm (104) consisting of parts extending sequentially in the -Z-axis, X-axis, and Y-axis directions in the orthogonal coordinate system is rotated by the frame (102). freely supported. °? - The free end of the -Z-axis direction portion of the arm (104) is connected to the operating rod (100a) of the plunger (100).
connected to. A roller (105) is rotatably supported at the free end of the arm (104) in the Y-axis direction. A leaf spring (106) is attached to the lower surface side of the lower extension board (94), and the roller (105) can abut against the lower extension board (94) via this temporary spring (106).

In β mode, the operating rod (100) of the plunger (100)
The plunger (100) is biased so that the arm (104) moves to the right in FIG.
) is rotated counterclockwise in Figure 8, and the leaf spring (1
06) to slightly lift the lower extension base 1 (104), thereby rotationally biasing the base & (80) clockwise in FIG. At this time, the left side portion of the substrate (80) in FIG. 8 abuts against the regulation plate (84).

In the VHS mode, the plunger (100) is deenergized so that the operating rod (100a) of the plunger (100) moves to the left in FIG.
104) rotates clockwise in FIG.
8) causes the substrate (80) to be rotationally biased counterclockwise in FIG.

At this time, the right portion of the substrate (80) in FIG. 8 abuts against the regulation plate (85).

Next, referring mainly to FIG. 7 and FIGS. 9 to 12, the means for regulating the rotational positions of the drum (70) and the base body (75) will be described. The flange of the base body (75) has pins (111) on diameters perpendicular to each other.

(112): Elongated holes (115) in the circumferential direction that are screwed into (113) and (114) and bored in the respective gears.

(116) i (117) and (118) are loosely fitted. Pin (113) and gear (76
) and between the pin (114) and the gear (76) are a pair of symmetrical springs (121) and (122);
(123) and (124) are stretched. The elastic biasing force of the springs (121) to (124) causes the pins (111) to (114) to move into the elongated hole (1).
15) to (11B).

Especially for pins (111) and (112),
A pair of L-shaped stoppers (125) and (126) for β and VHS modes are provided on the substrate (80), respectively. The stopper (126) in VHS mode is located on the straight line connecting pins (111) and (112), but the stopper (125) in β mode is offset 15.5 degrees clockwise from that straight line. There is.

Next, mainly referring to FIGS. 7 and 9 to 12,
The rotational position detection means for the drums (71), (72) and the base (75) will be explained. (127).

(12B) are photosensors for β and VHS modes, respectively, and are arranged on the upper extension board (89) symmetrically with respect to the pin (114) at a predetermined angle. In addition, the sensors (127) and (12B) detect the rotational angle positions of the drum (70) and the base body (75), and the light shielding plates (129) and (130) in the VHS mode have teeth m(7
6) is attached to the bottom of the

Figure 13 shows β and VH provided on the fixed lower drum (73).
The positions and angles of the S-lead guides (73) and (74) are shown, and the angles (corresponding to the total wrapping angle of the tape) are 188° and 157°, respectively, with 4° on each side.

It has an overlap angle of 3.66°. The distance between both lead guides (73) and (74) is 7.
It is 5°. And the exit of the β tape (23) and the VHS
Place the drum (7) so that the outlet of the tape (24) coincides with the outlet.
1) , (72) and the base (75) are rotated by half a turn, more precisely 164.5°, to perform lead switching.

β and V by rotating the drum (70) and base (75)
When switching the lead guides (73) and (74) of H3, the gear (76) is rotated by the motor (96) via the reduction gear mechanism, but the pin (11)
1) or (112) is the stopper (125) or (126)
), at that point the photo sensor (127)
Or (12B) has not detected the light shielding plate (129) or (130) yet, so the gear (76) spring (121) ~
The light shielding plate (124) is further rotated against the biasing force of the light shielding plate (124), and the photo sensor (127) or (128)
29) or (130) is detected, the motor (96)
stops rotating, and the gears also stop rotating. Furthermore, gears (
The rotation stop state of 76) is locked by the jff4 engagement between the worm (96) and the gear (91).

Adjust the diameter of the drum (70) to the β system drum diameter, and set the rotating drum (71) at 11,300 rpm for the NTSC system.
, CCII? In the case of the VH3 method, the number of fields is the same as the β method, but the drum diameter is larger than the VH3 standard, so the time axis is the same as that of both drums. It is shortened according to the ratio of i. Therefore, in the case of the VHS system, the signal may be temporally compressed and recorded according to the ratio, and after reproduction, the signal may be temporally expanded and returned to the original signal.

Since the gap azimuths of the rotating magnetic heads for β and VH3 are 7° and 6°, respectively, the rotating magnetic heads (total of 4) for β and VH3 are attached to the upper rotating drum (71) at predetermined angular intervals. In this case, if you change the polarity of the common pulse generation magnet or increase the number of pulses, P
The number of G coils is 4 (but 211M is also fine. However,
Considering that the gap azimuth difference between both types is only 1°, head 2 (1
1i1 and one head with a gap azimuth of 6° (or vice versa). Furthermore, if azimuth correction is to be performed, the gap azimuth should be 6° or 7°.
It is also possible to provide only two ° heads.The number of channels of the zero rotation transformer corresponds to the number of heads, but
If the heads are switched within the rotating drum (71), only two channels are required.

If the tape guide drum (70) is composed of upper and lower fixed drums and a rotating disk therebetween, lead guides for β and VH3 may be provided on the upper and lower fixed drums, respectively.

Next, with reference to FIG. 14, loading (threading) of the tape onto the tape running thread and the tape guide drum will be described. Figure 14 shows a state in which the magnetic tape is loaded onto the tape guide drum.A ronde ring (134
) are rotatably arranged, and both are separated from each other. ring(
134) are provided with guides (135) to (139) and a pitch roller (140). Guide (13
5) is a tape pull-out river guide. (141) ~
(146) is a fixed guide attached to the fixed part.

Reference numeral (147) is a tensile regulator guide, which is not shown but is mounted on the tension arm and rotated as shown. (148), (149), and (150) are guides that are not used because they fall down as shown in FIG. 15 in the β mode, but stand up and are in use as shown in FIG. 16 in the VHS mode. Of these, guides (14B) and (149) are inclined guides and guides (
150) is an upright guide with a tsuba on the artist. These guides (14B) to (150) t guide (150)
(can be omitted), it is possible to make the tape running angle to the tape entrance portion equal in the β mode and in the VHS mode.

(14B) is the capstan, tape (23) or (2
4) in cooperation with the pinch rollers (140) and run at a constant speed. (168) is a full width erase head, (151A
) is the audio cancellation head for β and VH3, (151B) is the audio/control head for β, (151C) is for VH
This is a voice/control head for S.

Next, with reference to FIGS. 15 and 16, the guide (14
B) to (150) will be explained. Guide (149)
, (150) are installed on a common block (152), and this block (152) is rotatable around an axis (153).
It is rotatably attached via 2a).

A bar (154) is further rotatably supported around a shaft (155) and has a cylindrical free end (154a) of the lever (154).
) comes into sliding contact with the cam surface (156a) of the inclined cam (156).

The lever (154) is rotationally biased -ζ counterclockwise by a tension spring (165). According to the movement of the arm (157) to which the cam (156) is attached in the direction of the arrow,
The lever (154) is rotated around the shaft (155), so that the guides (149) and (150) stand up (in VHS mode) or fall down 90" to the side (in β mode). The arm (1
57) is attached to a switching means for switching the interval between the supply and take-up reel stands, which will be described later, according to β and the VHS mode, and is moved in conjunction with the switching.

On the other hand, the guide (148) is installed on the block (15B), and this block (152) is rotatable around the shaft (159).
A lever (160) rotatably mounted via a)
is rotatably supported around a shaft (161), and a lever (
The free end (160a) of the lever (160) is rotatably attached to the lever (163) via the shaft (162).
163) is the operating rod (164a) of the plunger (164)
mounted on. The lever (160) has a tension spring (16
6), it is rotationally biased counterclockwise. In this case, in the β mode, the plunger (164) is deenergized, the operating rod (164a) protrudes, and the guide (14B) is tilted laterally by 90° due to the elastic force of the spring (166). V
Conversely, in the HS mode, the plunger (164) is energized, the operating rod (164a) is retracted into the inner part 81S, and the spring (16
The guide (148) will stand up against the elastic force of step 6) at the time when the loading of the tape (23) onto the drum (70) is completed.

Next, by rotating the loading ring (134) in the counterclockwise direction β, the tape (23) or (24) is transferred to the drum (
70), the tape running path is the first
This will be explained with reference to FIG. β or V HS cassette (1
The β or VHS tapes (23) and (24) fed out from the supply reel (3) or (5) of 1, (21) are connected to the guide (144) - tension regulator guide (147).
) - erase head (149) - guide (145), the β tape (23) is wound on the drum (70) with an incident angle of 5°, and the VHS tape (24) is wrapped around the guide ( 148) - guide (149) - (150) with an angle of incidence of 5.94° onto the drum (70). The V HS tape (24) is engraved and the drum (7
After the tape (24) is adjusted by the guide (150) to the lead (74)
It will be done so that you are well guided.

The tape (23) or (24) that comes out of the drum (70) is the guide (143) - guide (142) - β, VH3 common erase head (151A) - β audio/control head (151B) - V HS audio・Control head (151G) - Guide (141) - Capstan (1
48) and pinch roller (140) - guide (135)
) - Guide (136) - Guide (137) - Guide (1
38)--Guide (139)--Guide (146) path to be wound onto the take-up reel (4) or (6).

In Figure 8, β, VHS tape (23).

(24) When the center of the tape width of the artificial part to be wound on the drum (70) is common, the base tFi (8
0) and guide (14B) in Fig. 14.
(150) may be provided on the tape exit side of the drum (70).

Next, the cassette mounting mechanism will be explained with reference to FIGS. 17 and 18. Here, FIG. 17 shows the β mode, and FIG. 18 shows the VHS mode.

In both figures, (200) is a supply reel stand, and coaxially with this is a reel shaft (201) and a supply reel motor (
202) are integrally arranged and rotatably attached to a supply reel base board (not shown).

(210) is a take-up reel stand, on which a reel shaft (211) and a take-up reel motor (212) are integrally arranged coaxially, and are rotatable on a movable take-up reel stand board (213). mounted on.

Both side edges (214) of the take-up reel base board (213) and (
215) are slidably supported in respective guide grooves (205) and (206) of guide members (203) and (204) fixed to the chassis. In addition, the reel base + ff1 (21
A rack (217) is fixed to the extension part (216) of 3).

(220) is a motor for switching operation modes, (221) is a worm, and each has a small pulley (222).
.

The large pulley (223) is installed, and both pulleys (22
Bell I-(224) is stretched between 2) and (223).

Worm wheel (22) that meshes with the worm (221)
5), and a gear (227) is attached to the other part of the rotating shaft (226), which is engaged with a rack (217) attached to the extension part (216') of the reel base board (213). ing.

(230) is a switching member with an L-shaped cross section, and a long hole (232) provided at one end of its horizontal portion (231).
The force of the fixed shaft (207) installed on the chassis < Iil+
At the same time, the other end of the horizontal portion (231) is connected to the connecting member (
On the vertical wall (234) of the switching member (230), which is connected to the reel base board (213) via the Slanted guide grooves (235) and (236) and 1 for VH3
A pair of inclined guide grooves <237) and (23B) are provided. In addition, each pair of diagonal guide grooves (235).

(236), (237), and (238) are formed so that their height changes are opposite to each other. Further, the arm (157) of the inclined cam (156) shown in FIGS. 15 and 16 is fixed to the vertical wall (234).

(240) is an opening member, and the upper edge (242) of the vertical part (241) bent into an L-shape is ff1 (7) of the tape cassette (1), +2) shown in FIG. ), +
81. The horizontal part (243) of the lid opening member (240)
) is provided with a long hole (244'I).
), a pair of guide pins (245) and (246) are planted on the other end of the horizontal portion (231) of the switching member (230).
) is inserted. The lid opening member (240) is biased to the right in the drawing by a biasing spring (not shown) in the extending direction of the horizontal portion (231'').

(251) and (252') are a pair of left and right positioning pins for β, which correspond to the positioning holes (13) and (14) of the tape cassette (1) for β shown in Figure 1 above. 0 pin (251) provided at the position (
Branch bins (253) and (25
4) is the β inclined guide groove (235) of the switching member (230)
, (236) respectively. Also,
Both positioning pins (251) and (252'') are connected to a pair of height regulating tubes (255) provided on the guide member (204).
), (256) so as to be movable up and down.

(261) and (262) are V l (left and right 1 for S
A pair of positioning pins, a through hole (15) for positioning the VHS tape cassette (2) shown in FIG. 1 above,
0-ryo bin (261) corresponding to (16), (2
Branch pin (263') provided on (62), (26
4) is the inclined guide groove (2) for VH3 of the switching member (230")
37) and (23B), respectively. Also, both positioning pins (261).

(262) is supported so as to be movable up and down within a pair of height regulating tubes (265) and (266) provided on the guide member (204).

(271) and (273) are tape cassettes for VH3.
) A light source for an end sensor and a reel lock H removal bottle for the (2), respectively, and both are fixed to a rotating shaft (274), and the rotating shaft (274) is connected to a supply reel stand (200) and a take-up reel stand (210). ) are arranged horizontally between the As shown in FIG. 18, the pin (272) provided at the bottom of the end sensor light source (271) is connected to the switching member (230).
It engages with a notch (239) provided in the vertical wall (234) of.

In the β mode (not shown in Fig. 17), there is a supply reel stand (7).
200) and the take-up reel stand (210") as shown in the above
In order to equalize the distance 11 between the supply reel (3) and take-up reel (4) of the β tape cassette (1) shown in the figure, the motor (220) is energized to rotate in the normal direction using a mode setting switch (not shown). When the worm wheel (225
”) is rotated counterclockwise, and the rotation is 18 as described in 1.
Ranked (21) by the Confederate Army (227) regulated to 0゛
7) are cooperated to move the guide member (203) so that the take-up reel base board (213) approaches the supply reel base (200).
, (204). In addition, the reel stand board (
As the switching member (213) moves, the switching member (
230) also slides to the left in FIG. 17 in the extending direction,
Positioning pin for β (251).

The branch pins (253) and (254) of (252) are connected to the inclined guide grooves (235') and (235') of the switching member (230).
236), (235h), (236h)
Since it is located at the positioning pin (251),
(252) is a height regulating cylinder (255).

It protrudes from (256). On the other hand, the VHS positioning pin (261) and the branch bottle (263) of (262)
, (264) is the inclined guide groove (
237), the lower part of (23B) (237it
) and (2381), the positioning pins (261) and (262) are located at the height regulating tube (2
65), descending within (266). Note that the end sensor light source (271) and reel lock release pin (2'73) become horizontal when the switching member (230) slides to the left in β mode, and the β tape cassette (1'73) becomes horizontal. ).

In the VHS mode shown in FIG. 18, the distance between the supply reel stand (200) and the take-up reel stand (210) is changed from the supply reel (5) of the VH3 tape force center 7H21 in FIG.
and the distance between the take-up reel (6)! 2, the motor (220) is set by a mode setting switch (not shown).
When the worm wheel (2
25) is rotated clockwise, and the rotation is 180 degrees as described below.
Rank (217) by the gear (227) regulated to °
) is driven, and the take-up reel base board (213) slides away from the supply reel base (200). Further, as the reel base board (213) slides, the switching member (230'') connected thereto also moves to the 18th position in its extending direction.
Slide to the right in the figure and insert the β positioning pin (251),
The branch bins (253) and (254) of (252) are connected to the inclined guide grooves (235) and (254) of the switching member (230).
236) lower part (235ff1).

(2361), so the positioning pin (25
1) , (252”) is a height regulating tube (255),
(256). On the other hand, the positioning pin (261) for VH3.

The branch pins (263) and (264) of (262) are connected to the inclined guide grooves (237) and (264) of the switching member (230).
23B) high part (237h), (238h
), so the positioning pin (261),
(262) is a height regulating cylinder (265).

Projects from (266).

Furthermore, in the VHS mode, when the switching member (230) slides to the right, the lower protrusion (272) of the end sensor light source (271) engages with the notch (239) of the vertical wall (234). Therefore, the end sensor light source (271> rotates 90 degrees around the rotation axis (274) and becomes vertical, and at the same time, the reel lock release pin (273) also becomes vertical. In this state, the VHS tape cassette (2)
When mounted, the end sensor light source (271) and reel lock release pin (273) are jilted into the insertion holes (21) and (22), respectively.

In addition, the opening member (240) moves to the right together with the switching member (230), but the sliding distance of the switching member (230), that is, the supply one take-up reel of the VH5 tape cassette (2) +
51, (6) The distance between 12 and the tape force cent for β (
As is clear from No. 1 and 1, the difference 13 between No. 11 and No.
240) is inserted into the notches (18) and (19) at the distance from the supply reel +31, +51 to f2 g of 1
Since it is larger than 9, the horizontal part (
The right edge (247) of the cover opening member (243) is brought into contact with a regulating member (not shown) to regulate the movement of the lid opening member (240) to a required distance.

Next, the cassette guide mechanism will be explained with reference to FIGS. 19 and 20. FIG. 19 shows the β mode, and FIG. 20 shows the VHS mode.

In both figures, (22B) is an eccentric cam, (229) is a rotation regulating cam, and a peripheral point (228a) at the maximum distance dl corresponding to β mode from the rotation center of the eccentric cam (228).
) and the peripheral point of the minimum distance d2 corresponding to VHS mode (2
28b) are arranged at an angular interval of 180°, and the regulating cams (
229), β mode and V
A pair of recesses (229a) and (229a) corresponding to HS mode
0-car cam (228) and (229b) are engraved with
229) are the maximum and minimum distance points (228a) and (2
28b) and both concave portions (229a) and (229
The worm wheel (225) is fixed to the rotating shaft (226) of the worm wheel (225) so that the straight line connecting the worm wheel (225) is parallel to the straight line connecting the worm wheel (225).

(281) is an S-shaped regulation lever, and the support shaft (281) is an S-shaped regulation lever.
2), and one end (283) of the regulation lever (281) is rotationally biased clockwise by a spring (2B4). Regulation lever (281)
The claw (285) at the other end engages the four parts (2) of the regulation cam (229).
29a) or (229b), and is connected to the operating rod (28B) of the C plunger (287) by a connecting member (286). A micro switch (2B) is installed on the side of one end (283) of the lever (281).
! l]) is in contact with the push button (289b) without being pressed.

(290) is the upper plate, which includes a guide slot (291) in the width direction, a slot guide hole (292) in the longitudinal direction, and a guide slot (292) in the longitudinal direction.
3) is provided. Further, a support shaft (294) is installed on the upper surface of the upper plate (290), and a long hole (294) is installed on the lower surface of the upper plate (290).
2) and (293), and in parallel thereto, a pair of guide members (295), (296), and (297) on the left and right.
, (29B) are attached. In addition, (299
) is the supply reel viewing window.

(301) and (302) are a pair of left and right cassette guide plates, each having notches (301c) and (302c).
are provided, and the bent portions (303) and (3
Link pins (305) and (306) on the top surface of
Guide pins (307) and (308) are also planted. Both guide plates (301) and (302) are connected to the upper plate (290).
), and both side edges of the respective bent portions (303) and (304) are the left and right guide members (295).

(296), (297), (298) in a slidable manner, and link pins (305) and (3
06) and guide pins (307) and (30B) are inserted into the long holes (292) and (293) of the upper plate (290).

(310) shows the link as a whole and its lever (3
11) is rotatably supported by a support shaft (294) installed on the upper plate (290). A roller (313) is rotatably attached to a shaft (312) provided at one end of the lever (311). The lever (311) is rotationally biased counterclockwise by the spring (314) and the roller (313) abuts the eccentric cam (228). A long hole (315) is provided at the other end of the lever (311), and a link pin (316) is inserted through this long hole (315) and the long hole (291) of the upper plate (290). This link pin (316) and the link pins (305), (306) of the left and right cassette guide plates (301), (302) are connected by connecting members (317), (318), respectively. 310).

When switching from VHS mode to β mode, the operation of the cassette guide mechanism is as follows.

When the β mode is set by the mode setting switch (not shown), the plunger (2B?) is first energized, and the claw (285) of the regulation lever (281) and the regulation cam (2
29) is disengaged from the fourth part (229b) corresponding to the V-HS mode, and the microswitch (289
) by displacement of the lever (289a), the push button (289b
) is pressed, turning on the microswitch and supplying power to the motor (220). and a worm wheel (
225), the gear (227), the eccentric cam (22B), and the regulating cam (229) rotate counterclockwise. When the claw (285) of the regulation lever (281'') comes into contact with the periphery of the regulation cam (229) due to this rotation, the microswitch (
289) is kept in the on state, so the plunger (2B
? ) are deactivated accordingly. As the eccentric cam (228) rotates, the distance between its rotation center and the peripheral edge that abuts the roller (313) increases from the shortest d2 to the longest dl.

When both cams (22B) and (229) rotate 180°, the pawl (285) of the regulation lever (281) engages with the β-corresponding recess (229a) of the regulation cam (229), and at the same time the motor (220) The worm wheel (225), gear (227') and eccentric cam (2
The rotation of 28) is restricted to the position shown in FIG.

As a result of this rotation of the eccentric cam (22B), the lever (311
) rotates clockwise around the support shaft (294) to the position shown in FIG. Move inside the hole (291) from the front to the back as shown. Then, this link pin (316) and each connecting member (3
The link pins (305) and (306) of the left and right cassette guide plates (301) and (302) connected by 17) and <318) are respectively connected to the long holes (292) and (293) of the upper plate (290). the left and right cassette guide plates (301).
) and (302) are determined corresponding to the β tape cucent (1).

When switching from β mode to VHS mode, the mode setting switch (not shown) reverses the energization polarity of the °C motor (220), and the worm wheel (225) etc. rotate clockwise, etc., as described above. Although it operates in reverse, detailed explanation thereof will be omitted.

Next, the cassette loading/unloading mechanism will be described with reference to FIGS. 21 and 22.

In FIG. 21, (330) indicates the cassette holder as a whole, and there are side plates (332) on the left and right sides of the bottom plate (331).

(333) and left and right bent parts (334), (33
5) is provided integrally. VH5 tape cassette (2
) A pair of locking pieces (336) on the left and right sides that restrict the inserted view.

(337) is integrally provided on the front edge of the bottom plate (331). The bottom plate (331) has a notch (33) through which the supply reel shaft (201) and take-up reel shaft (211) described above are inserted.
8) and (339) and end sensor light source (271)
) is provided, and an opening (341) is provided for inserting a β-VH3 switching protrusion (355), which will be described later.

The side wall (332) has an opening (34) for inserting a protrusion (342) for unlocking the VH3 cassette M (8).
3) are provided, and the bent portions (334) and (335
) is an elastic piece (344) for pressing the cassette.

(345) is provided. Also, a side wall (332).

There is a guide pin (346) on the outside of each (333”).
.

(347) is established.

(351) is a rocking plate, and the β tape force is set on its front edge! - A pair of left and right locking pieces (352) and (353) regulating the insertion amount of (11) are integrally provided, and a β cassette lid (7) is provided on the side of the locking piece (352).
A lock release plate (354) is integrally provided.

Further, the swing plate (351) is provided with an inclined protrusion (355). The rocking plate (351) is an elastic plate (35B).
) (357) connects with the bottom & (351).

In FIG. 22, (360) is a motor for the cassette-mounted JBit, and the worm (360) is connected to the worm (360) via the shaft (361).
62). The worm wheel (363) that meshes with this worm (362) has a first gear (3
64) are provided coaxially, and the second. Third. Fourth and fifth gears (365), (366), (367)
and (368) are engaged in sequence. (371) A rotary lever for driving the gear set holder (330), and is disposed coaxially with the fifth gear (368). The end (372) of the rotation lever (371) has a long hole (373).
) is provided. (380) is an L-shaped guide groove provided on one side wall of the chassis (not shown), and the guide pin (346) installed on one side wall (332) of the cassette holder (330) is The guide groove (380) and the elongated hole (373) of the rotary lever (371) are inserted in common. Note that the guide pin (347) on the other side wall (333) of the cassette holder (330) is also provided with a mechanism similar to that of the second float (365) and the following.
are connected by a rotating shaft (369) of a gear (365).

When the cassette holder (330) is in the position shown by the broken line in FIG. 22, the tape cassette (11 or (2)) is inserted.
).

(302) are both side walls (3) of the cassette holder (330).
32) and (333), and the bent part (3
34).

(335) are guide plates (302) and (30
1) is located within the notches (302c) and (301c).

Tape force set for β) If +11 is inserted, the oscillation will occur.

The lid lock release plate (354) of the moving plate (351) has a notch (1
7) into the tape cassette (1) and close the lid (7).
) and the reels (3) and 141 are unlocked at the same time.

When a VHS tape cassette (2) is inserted,
As the inclined protrusion (355) of the rocking plate (351) is pushed down by the 1111 people in the case, the β locking pieces (352) and (353) and the lid lock release plate (3
54) is released downward from the bottom & (331), and V
It does not come into contact with the lid (8) of the HS JTJ tape cassette (2). Also, the protrusion (342”) on the holder side plate (333”)
) is the lid lock release protrusion (20) of the tape cassette (2).
) to lock the lid (8).

When the tape cassette t1) or (2) is inserted and the motor (360) is energized, the driving force is transmitted through the worm (362) and the gear (36B), and the bar (371) rotates. Rotate counterclockwise to the position shown.

As the lever (371) rotates, the guide pin (346)
) first moves horizontally along the guide groove (380). At the end of this horizontal movement, the bent portions (334), (335) of the skein/gutter holder (330) and the skein/gutter guide plate (
301), the intersection state with (302) is M! Be erased. The lever (371) continues to rotate and the guide pin (
346) then descends vertically along the guide groove (380). At the end point of this vertical descent, the tape cassette throat (11 or (2) held by the cassette holder (330) engages with the positioning pins (251), (252) or (261), (262) in a predetermined state. , reel axis (201), (211) is reel +3)
, (4) or (51, (61).

Note that when tape unloading is complete, the motor (
360) is reversed, and the cassette holder (330) is moved back to the cassette insertion position.

〔Effect of the invention〕

According to the present invention described above, the configuration of the tape guide drum is simple, its size can be made small, and the tape running angle at the tape entrance or exit part of the tape guide drum can be changed.
It is possible to obtain a magnetic recording/reproducing apparatus in which most of the tape running system can be shared, and tape cassettes of two different types of magnetic recording/reproducing apparatuses can be used.

[Brief explanation of drawings]

1 and 2 are a perspective bottom view and a side view showing a tape cassette of a β and VH3 type magnetic recording and reproducing device that can be used in the magnetic recording and reproducing device according to the present invention, and FIGS.
5 and 5 are a plan view showing the tape running thread of a conventional β-type magnetic recording/reproducing device, a plan view showing the net view, and a plan view showing the tape loading process, and FIG. FIGS. 7, 8 and 9 are a perspective view showing a tape running system of a playback device; FIGS. 7, 8 and 9 are a perspective view, a side view and a plan view showing a tape guide drum device of an embodiment of the magnetic recording and playback device according to the present invention; FIG. 10 is a plan view showing a part of the tape guide drum device shown in FIGS. 7 to 9, and FIGS. 11 and 12 are partial cross-sectional views of various parts of the tape guide drum device shown in FIGS. 7 to 9. , FIG. 13 is a plan view of the tape guide drum device shown in FIGS. 7 to 9 without showing the tape guide tram, and FIG. 14 is a diagram showing the tape running system of an embodiment of the magnetic recording/reproducing device according to the present invention. 15 and 16 are perspective views showing the operating state of a part of the tape running system of FIG. 14, and FIGS. 17 and 18 are views of an embodiment of the magnetic recording/reproducing apparatus according to the present invention. A perspective view showing the operating state of the cassette loading mechanism, No. 19
20 and 20 are perspective views showing the operating state of the cassette guide mechanism of an embodiment of the magnetic recording/reproducing apparatus h1 according to the present invention,
FIG. 21 is a perspective view showing a cassette holder of an embodiment of the magnetic recording/reproducing apparatus according to the present invention, and FIG. 22 is a side view showing the driving mechanism of the cassette holder. (69) is a tape guide drum device, (70) is a tape guide drum, (71) is a rotating upper drum, (72) is a fixed lower drum, (148) and (149) are tape winding slopes for controlling corners. It is a guide. Figure 8 Figure 9 Figure 16 Diagram n Procedural Amendment October 22, 1980 Patent Application No. 176474 Passed 2/Invention 0 Title Magnetic Recording/Reproducing Device 3, Relationship to famous case for amendment Patent applicant

Claims (1)

[Claims] The tape is pulled out from the tape cassette to the opposite side of the tape cassette by approximately 18 mm with respect to a diameter parallel to the front surface of the tape cassette of the tape guide drum having a rotating head.
In a magnetic recording and reproducing device that winds the tape with a winding angle of 10°, two inclined guides for regulating the tape winding angle are provided at the tape entrance or exit of the tape guide drum, and A driving means is provided for driving the two inclined guides up and down depending on whether the two inclined guides are in use or not in use, and the drive means is provided at an inlet portion or an outlet portion of the tape guide drum depending on whether the two inclined guides are in use or not in use. 1. A magnetic recording and reproducing device characterized in that the tape running angle in the tape is changed.