JPS6159653A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To share most of a tape running course to simplify the constitution by moving a take-up reel turntable connected to a rack and a switching member by a prescribed length with respect to a supply reel turntable and raising and lowering a tape guide. CONSTITUTION:When a motor 220 is rotated forward, a substrate 213 and a take-up reel turntable 210 approach a supply reel turntable 200 through a gear 227 by a rack 217, and the interval between them is allowed to coincide with the length between reel centers of a cassette for BETA. A switching member 230 and an arm 157 are slid left by this movement, and a cam 156 raises and lowers the tape guide through a pin 154a. By vertical movement of branch pins 253, 254, 263, and 264, pins 251 and 252 for BETA are projected from height control cylinders 255 and 256, and pins 261 and 262 for VHS are lowered into cylinders 265 and 266. In the VHS mode, the operation opposite to this operation is performed by reversing of the motor. Thus, the reel turntable is moved by a prescribed length in accordance with cassettes different in dimensions, and most of the running course is shared to simplify the structure.

Description

[Detailed description of the invention] 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 so as to form a tilted track on the magnetic tape, and the rotary magnetic head scans the tilted track to reproduce the modulated video signal. 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, (11 is a β-max tape cassette (hereinafter abbreviated as β-cassette), (la),
(lb) shows both sides of it, and (2) shows the VH5 tape cassette (hereinafter abbreviated as VHS cassette).
2a) and (2b) respectively show both sides,
Figure 1 is a perspective bottom view of cassero I-(1) and (2).
FIG. 2 is a side view of each short side thereof.

(3), (41 is the β supply and take-up reel and the interval is 11, (5), T61 is the VH3 supply and take-up reel, and the interval is 12, Ill (-92 m
) <12 (=76), the difference is 12-I1. β3
(=16m). 14+1G is β cassette) (1
) width.

Depth, 15mm, AT is VH3 power ('7 and (2) width respectively.

The depth is 14 (-156 cranes) <j! 5(-
188 Shinho), I! e (-96ml
) <jv (-1041㎽), and the β cassette (1) is smaller than the VHS cassette (2). In addition, β and VHS cassettes (11
, (thickness im of 21 (=25 forehead) is equal.

β and VHS cassettes) (1) and (2) both have a β tape (23), 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
pin (9), β cassette (1) by VHS pin aψ
, VHS cassette (2) is rotatably attached to the main body, and the opening on the tape side of each main body is opened and closed by these lids (71, (81).It should be noted that these lids (7) , (81 is elastically biased counterclockwise in FIG. 2 by a built-in return spring (not shown) so that it is in the closed state when not in use.
7+, (when s+ is in the closed state, its state is locked, and β and V HS reel (3).

(4) ; (5) and (6) are locking mechanisms (none of which are shown) for β and VHS cassettes) (
1) and (21) are built in, respectively.

Each of these cassettes (11, (21) has a large symmetrical trapezoidal β notch (1
1) and a small asymmetric trapezoidal VH3 notch (12)
is provided.

However, as can be seen from Figure 1, both force sets (11,
(21 on its front side, and the re-supply reel (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 of the dual force sets (1) and (2), on the front side thereof, 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 V
H3 through holes (15) and (16) are drilled, but their positions and intervals are different from each other.

The bottom of the β cassette (1) has a pair of slit-shaped notches (17 ), (18) are provided.

Note that one notch (17) is cut at 3 into a part of the lower end of 2M (7).

A slit-shaped notch (19) into which a VH3 lid raising plate of a VTR is inserted is provided on the bottom surface of the VHS socket (2) at a position biased to the negative side.

In addition, in the overlapping state of both cassettes (1) and (2) mentioned above, the β notch (18) and the VH3 notch (
19) The distance between l1lt19 is 9m.

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.

On the bottom of the VHS cassette (2), there are a pair of insertion holes (2) in the front and back approximately in the center, into which the light source for the tape end sensor of the VTR and the reel lock release pin are respectively inserted.
1) and (22) are provided.

Next, we will explain the conventional β-VTR, VH5-VTR (D tape guide drum, tape running system, and tape loading onto the tape guide drum.
TR will be explained with reference to FIGS. 3 to 5. Third
4 and 4 show the 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 (
diameter 74.487 m), fixed upper drum (31),
A fixed lower drum (32) and a rotating disk (3
3), and a pair of rotating magnetic heads (33H) are attached to the rotating disk (33) so as to face the outside. The lower drum (32) has an inclined lead guide (lead angle is 5°) that contacts the lower edge of the tape (23).
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) there is a rotation guide (35) ~
(37) and pinch rollers (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) includes a pair of mutually rotating couplings 7 and 7 which are pivotally supported on the ring (34).
, (40) (7) On the other hand (7) 7'-mu (40)
It is planted at the i-end of the tree. The guide (37) is a guide groove plate (4
1) is guided by the long FJ (notch) (41a).

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 bin (43a)-erase head (44) path of the tension regulator arm (43) to the drum. (30) (the winding angle is 188°), then the erase head (46) - the audio/control head (
45) - Capstan (47) and Pinch Cola (38)
) - the tape pull-out guide (35) - guide (36) - After passing through the guide (37) and the guide in the cassette (1), it is wound onto the take-up reel (4).

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 ANC is tape (23) for drum (30)
As shown in FIG. 5A, the guides (35), (36), (37) and the pinch roller (38) are located inside the tape (23) on the front of the cassette (11). Then, as the ring (34) rotates in the counterclockwise direction α, the tape (23) is pulled out by the guide (35), and the tape (23) is pulled out 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 V) fS-VTR will be explained. FIG. 6 shows a state in which the magnetic tape is loaded onto the tape guide drum (M loading). (50)
is a tape guide drum (diameter 62 mm) (β drum (30 mm)
), 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 movement guides for tape drawer and tape loading. 24) and code it on the drum (50). Among movement guides (56) to (59), (57)
, (58) is the drum (50) of the magnetic tape (24).
) is a slanted guide that determines the angle.
(63) and (64) are impedance rollers,
They are positioned near the guides (56) and (59), respectively, via the tape (24).

(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)
After passing through the guide in the cassette (2), the tape (24) fed out from the cassette (2) passes through the guide (54) - guide (55).
- Erasing head (62) - Impedance roller (63)
It is wound around the drum (50) through the path of - guide (56) - guide (57) (the angle of the winding is 157°), and then the guide (58) - guide (59) - impedance roller (64). ) - Erase spatula)' (65) - Audio/control head (66) ~ Guide (60) - After passing through the path of capstan (61) and pinch roller (67), and passing through the guide in cassette (2) It is wound onto a take-up reel (6). Note that δ indicates the rotation direction (counterclockwise) of the rotating upper drum (51), and T indicates the tape running direction.

As mentioned above, the V of βmax method and VH3 method
Although there are many differences from TR in the structure and dimensions of the tape cassette, the structure and dimensions of the tape guide drum, the method of loading the tape onto the tape guide drum, etc., there is a possibility of commonality.

Therefore, a VTR for both the β system and the VH3 system, which can use tape cassettes, has been published by the applicant in Japanese Patent Laid-Open No. 56-119916 and Japanese Patent Laid-open No. 56-11996.
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]

Such VTRs have the disadvantage that the height of the tape guide drum is large and that a complicated mechanism is required to raise and lower the tape guide drum. Furthermore, a plurality of tape running paths having different heights on the elevator platform are required in correspondence with each mode, making the configuration even more complicated.

In view of these points, the present invention enables the reel stand to be moved a predetermined distance in response to a plurality of tape cassettes having different dimensions, and also simplifies the configuration by making most of the tape running path common. The purpose of the present invention is to provide a magnetic recording/reproducing device that can be used as a magnetic recording/reproducing device.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a motor (220
) is driven through the worm (221) by the tooth!
The rack (217) that engages with the reel stand (227)
10) and a switching member (230) are combined, and a tape guide undulating means (154'') is engaged with a cam (156) connected to this switching member (230).

[Effect]

The means of the invention works as follows.

When the gear (227) driven by the motor (220) via the worm (221) rotates, the reel stand (21
0) and the switching member (230) move a predetermined distance, and the cam (156) coupled to this switching member (230)
The tape guides (149) and (150) are raised and lowered by the tape guide raising and lowering means (154) engaged with the tape guides (149) and (150).

〔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) indicates the tape guide drum, (71) indicates the rotating upper drum ((71M) indicates its drive motor), (72)
is a fixed lower drum, and its root diameter is selected to be 74.7187 mm, 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 inclined lead guide (73) with a lead angle of 5.94°, and on the other half there is a VHS with a lead angle of 5.94°. The fixed lower drum is rotated approximately half a turn in both the positive and negative directions according to the β mode and the VHS mode, and the inclined lead guides (74) in each mode are arranged in the left direction in FIG. It is made to be located on the side. 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 the drum (71),
(72) A rotating magnetic head is attached to a drum (71) facing the outside in between.

FIG. 8 illustrates the state of the β mode of the tape guide drum device (69), and shows how the tape (23) of the β cassette (1) is guided by the inclined lead guide (73) for the drum (71). ), (72) is wound diagonally.

Furthermore, in this tape guide drum device (69), the axis AXβ of the drum (70) in β mode and VHS mode,
The tape of β and VH3 is passed through the center P of the tape width of the drum (70) (7) tape exit part (the entrance part is also possible), and the AXV (7) inclination is passed through the center P of the tape width of the tape exit part (the entrance part is also possible), and the tape of β and VH3 is passed around the axis perpendicular to the axis of the drum (70). The tapes (23) of both modes exit the tape outlet of the drum (7o) with a difference of angle α° (#1°) corresponding to the difference in lead angle.

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 with screws, and a large gear (76) is attached to the flange (75a) at the lower end thereof.

(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;
1) is a pedestal with a cylindrical concave upper surface, and the substrate (
80). This pedestal (81) is fixed on the substrate (83). (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 a gear column (92) having gears (90) and (91) above and below is rotatably supported by a shaft (93). ing. A lower extension board (94) is attached to the lower side of this upper extension board (89).
) between both bent parts (94a) and (94b),
A worm (95) that meshes with the gear (91) and a motor (DC motor) (96) that drives the worm are installed so as to extend across the gear.

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 the drums <71) and <72) are connected to the substrate (75).
At the same time, it is rotated approximately half a rotation in both positive and negative directions around the base (77).

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 base! (133
), and has a shaft (103) extending between its legs.

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 arm (104) in the -Z axis direction is connected to the operating rod (100a) of the plunger (100). 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),
The roller (105) is adapted to abut against the lower extension board (94) via this leaf 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 Fig. 8, and the slope spring (1
06) to slightly lift the lower oVi extension board (104), thereby rotationally biasing the board (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 V I-I S mode, the plunger (100) is deenergized such that the operating rod (100a) of the plunger (100) moves to the left in FIG. 8, thereby causing the arm (104) to move to the left in FIG. The substrate (80) is rotated clockwise in FIG. 8, and the elastic force of the spring (88) biases the substrate (80) counterclockwise in FIG.

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

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

(112) ; (113) and (114) are screwed into long holes (115) and (116) i (117) in the circumferential direction, which are bored in the respective gears.
(118) is loosely fitted. Between the pin (113) and the gear (76) and between the pin (114) and the gear (76)
), there are a pair of symmetrical springs (121) and (1
22) ; (123) and (124) are stretched. And this spring (121) ~ (1
24), the pins (111) to (114)
) is located at the center of the elongated holes (115) to (118).

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).

(128) are photosensors in 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. Also, in β and VHS modes (7) in which these sensors (127) and (12B) detect the rotation angle positions of the drum (70) and the base (75)! Tip plate (129), (130')
It is attached to the lower side of the gearwheel (76).

Figure 13 shows β and VH provided on the fixed lower drum (73).
S'J-)'Gail' (73), (74)
(7) The position and angle (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 the HS, the gear (76) is rotated by the motor (96) via the reduction gear mechanism, but the pin (1
11) or (112) is the stopper (125) or (12
6), at that point the photo sensor (127
) or (128) has not yet detected the light shielding plate (129) or (130), therefore, the gear (76) and the spring (121)
It is further rotated against the biasing force of ~ (124), and the light shielding plate (
129) or (130) is detected, the motor (96) is detected.
The engine stops rotating and the gears also stop rotating. In addition, the gear (
The rotation stop state of 76) is locked by the 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 1800 rpm for the NTSC system.
In the case of the CCIR method, it is rotated at a rotation speed of 1500 rpm, but in the case of the VH3 method, the number of fields is the same as the β method, but since the drum diameter is larger than the VH3 standard, the time axis is different from that of both methods. It is shortened according to the drum diameter ratio. Therefore, in the case of the VH3 system, the signal may be temporally compressed and recorded according to the ratio, and after playback, the signal may be temporally expanded and returned to the original signal.

Since the gap azimuths of the rotating magnetic heads for β and VHS are 7° and 6°, respectively, the rotating magnetic heads for β, Vl (S (total of 4) are mounted on the upper rotating drum (71) at a predetermined angular interval. In this case, if you change the polarity of the common pulse generation magnet or increase the number of pulses, you can use two PC coils instead of four.However,
Considering that the difference in gear/knob azimuth for both types is only 1°, we will provide 2 head/nods with a gap azimuth of 7° and 11111 head/nods with a gap azimuth of 6° (the reverse is also possible). Is possible. Furthermore, if azimuth correction is to be performed, it is also possible to provide only a gap azimuth force (6° or 7° head 2 + [lil).The number of channels of the rotary transformer corresponds to the number of heads, but If the heads are switched in (71), only two channels are required.

If the tape guide drum (70) is composed of upper and lower fixed drums and a rotating disk between them, lead guides for β and VH5 may be provided on the upper and lower fixed drums, respectively.

Next, with reference to FIG. 14, a description will be given of the tape running system and the loading (threading) of the tape onto the tape guide drum. FIG. 14 shows a state in which the magnetic tape is loaded onto the tape guide drum. There is a rondin ring (13
4) are rotatably arranged, and both are separated from each other. Guides (135) to (139) and a pinch roller (140) are provided on the ring (134,). Guide (1
35) is a guide for drawing out the tape. (141) ~
(146) is a fixed guide attached to the fixed part.

Reference numeral (147) denotes a tension legiator guide, which is not shown but is mounted on the tension arm and rotated as shown. (148), (149), and (150) are guides that fall down and are not used in the β mode as shown in FIG. 15, and stand up and are in use as shown in FIG. 16 in the VHS mode. Of these, guides (148) and (149) are inclined guides and guides (
150) is an upright guide with a collar under the rain. These guides (148) to (150) (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.

(148) is the capstan, tape (23) or (2
4) in cooperation with the pinch rollers (140) and run at a constant speed. (168) is the full width erase head, (151Δ
) is a voice erasing head for β and VH3, (151B) is a voice/control head for β, (151G) is a VH3
This is a voice/control head for use.

Next, with reference to FIGS. 15 and 16, the guide (14
8) 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).
A lever (154) rotatably mounted via the lever (154)
) is further rotatably supported around a shaft (155), and the 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 pivoted counterclockwise by a tension spring (165). In response to 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), thereby causing the guides (149) and (150) to stand up. It is controlled so that it tilts horizontally (in VHS mode) or 90 degrees horizontally (in β mode). Furthermore, arm (157)
is the supply and take-up reel stand spacing, which will be described later, as β and VH.
It is attached to a switching means that switches according to the S mode, and is moved in conjunction with the switching.

On the other hand, the guide (14B) is installed on the block (15B), and this block (152) is made rotatable around the shaft (159).
A lever (160) rotatably mounted via the lever (160)
) is rotatably supported around a shaft (161), and 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).
). The lever (160) has a tension spring (1
66) in a counterclockwise direction. 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).

Conversely, in the VHS mode, the plunger (164) is energized, the operating rod (164a) is retracted inside, and the spring (166)
) The guide (148) stands up against the elastic force of the tape (23) at the completion of loading onto the drum (70).

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) (S cassero l-(
11, the β or VHS tape (23), (24) fed out from the supply reel (3) or (5) of (21) is connected to the guide (144) - tension regulator guide (14).
7) - After going through the common path of erase (149) - guide (145), the β tape (23) is wrapped around the drum (70) with an incident angle of 5°, and the VHS tape (24)
is the drum (70) with an incident angle of 5.94° via the path of guide (148) - guide (149) - (150).
wrapped around. For VHS tape (24), guides (148) and (149) guide drum (7).
After winding (height and angle of incidence) is adjusted on the tape (24) on the lead (74) by the guide (150).
It will be done so that you are well guided.

The tape (23) or (24) coming out of the drum (70) is guided by the guide (143) - guide (142) - β, VH5
Shared erase head (151Δ) - β audio/control head (151B) - V HS audio/control head (151G) - Guide (141') - Between capstan (14B) and pinch roller (140) - Guide (
135) - guide (136) - guide (137) - guide (138) - guide (139) - guide (146) and is wound onto the take-up reel (4) or (6).

In addition, in FIG. 8, β, VHS tape (23).

(24) When the center of the tape width at the entrance part for winding onto the drum (70) is common, the substrate (80) is rotated around an axis passing through the center and orthogonal to the axis of the drum (70). guides (148) to (15) in Fig. 14.
0) 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. Further, a rank (217) is fixed to the extension part (216) of the reel base board (213).

(220) is a motor for switching operation modes, (221) is a worm, and each has a small pulley (222'
) large pulley (223) is installed, both pulleys (2
Bell 1-(224) is stretched between 22) and 223.

Worm wheel (22) that meshes with the worm (221)
5), and both sides (227) are attached to the other part of the rotating shaft (226), and are engaged with the 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 the horizontal part (231)
A fixed shaft (207) set up on the chassis is inserted, and the other end of the horizontal portion (231) is connected to the reel base board (213) via a connecting member (233). The vertical wall (234) of the switching member (230) is provided with a pair of inclined guide grooves (2) for β whose heights are changed at both ends as shown in the figure.
35) and (236) and a pair of inclined guide grooves (237) and (238) for VH5 are provided. In addition, 1 each
A pair of inclined guide grooves (235), (236) and (237),
(23B,) are formed so that the height changes are opposite to each other. 1. The arm (157) of the inclined cam (156) shown in FIGS. 15 and 16 is fixed to the vertical wall (234').

(240) is a lid opening member, and the upper edge (242) of the vertical part (241) bent into an L shape is the lid (7118+) of the tape socket (1) i2) shown in FIG. The horizontal part (243) of the lid opening member (240) has a long hole (2
44) is provided, and a switching member (244) is provided in this elongated hole (244).
A pair of guide pins (245), , and (246) planted at the other end of the horizontal portion (231) of 30) are inserted. The lid opening member (240) is biased to the right in the drawing in the extending direction of the horizontal portion (231) by a biasing spring (not shown).

(251) and (252) are a pair of left and right positioning mechanisms for β, which are similar to the tape cassette for β shown in FIG.
They are provided at positions corresponding to the positioning holes (13) and (14) of 1). Both bottles (251>, (
252”) branch pins (253), (2
54) is the β inclined guide groove (235) of the switching member (230).
”) and (236), respectively. In addition, both positioning pins (251) and (252) are inserted into the pair of height regulation wI(
255), (256) The inner part is supported so as to be movable up and down.

(261) and (262) are a pair of left and right positioning pins for VH3, which are through holes (15) and (1) for positioning the VHS tape cassette (2) shown in FIG.
Corresponds to 6). Both bottles (261), (262)
The branch bins (263) and (264) provided in the switching member (230) and the inclined guide groove for OVH3 (237),
(238) respectively. Also, both positioning pins (261) (262) are guide members <204).
A pair of height regulating tubes (265) and (2
66) so as to be movable up and down.

(271) and (273) are the end sensor optical edge and reel lock release pin for the VH3 tape force center (2), respectively, and both are fixed to the rotating shaft (274,), and the rotating shaft (274) is the supply It is arranged horizontally between the reel stand (200) and the take-up reel stand (210). 1st
As shown in Figure 8, a pin (272) provided at the bottom of the end sensor light source (271) engages with a notch (239) provided in the vertical wall (234) of the switching member (230). .

In the β mode shown in FIG. 17, the supply reel stand (2
00> and the take-up reel stand (210) to be equal to the distance 11 between the supply reel (3) and take-up reel (4) of the β tape cassette yH1) shown in FIG. When the motor (220) is energized to rotate in the normal direction by the motor (not shown), the worm wheel (225) rotates counterclockwise, and the rack is rotated by the gear (227) whose rotation is regulated to 180° as described below. (217) is driven so that the take-up reel base board (213') approaches the supply reel base (200>).
(204). In addition, the reel stand board (213)
As the switching member (230) is connected to the
The positioning pin for β (251) also moves to the left in FIG. 17 in the extending direction.

The branches (253) and (254) of (252) are the inclined guide grooves (235) and (23) of the switching member (230).
6), so the 11 positioning pins (251), (
252) is the height regulation? i? Projects from j (255) (256). On the other hand, VHS positioning pin (261),
(262) technique pin (263), (264)
is the inclined guide groove (237) of the switching member (230),
The lower part of (238) (237ff1), (23
8A>, so the positioning pin (261),
(262) is the height regulating tube (265), (26
6) It is descending within. In addition, the light source for the end sensor (2
71) and the reel lock release pin (273) are in a horizontal state when the switching member (230) slides to the left in β mode, and do not obstruct the β tape cassette (1).

In the VHS mode shown in FIG. 18, the distance between the supply reel stand (200) and the take-up reel stand (210) is
Supply reel (5) of VH3 tape cassette (2) shown in the figure
In order to equalize the distance a2 between the take-up reel (6) and the take-up reel (6), the motor (220)
When the worm wheel (2
25) is rotated clockwise, and the rotation is 111 as described below.
The rack (21
7) is driven, and the take-up reel base board (213) slides away from the supply reel base (200'').Also, as the reel base base board (213) slides, a The switching member (230) also has the first switching member (230) in its extending direction.
Slide to the right in Figure 8 and insert the β positioning pin (251).
(252') branch pin (253), (254
) is the inclined guide groove (235) of the switching member (230),
Lower part (235E) of (236).

(236N), so the positioning pin (25N)
1), (252) is the height regulating tube (255),
(256). On the other hand, the branch pin (263) of the VH3 positioning pin (261”) (262),
(264') is the inclined guide groove (23) of the switching member (230).
7,), the high part of (238) (237h),
(238h), so the positioning pin (
261) and (262) are height regulating tubes (265) (
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" around the rotation axis (274'I) and becomes vertical, and at the same time, the reel lock release pin (273) also becomes vertical. In this state, the VH3 tape cassette (2)
When installed, the end sensor light source (271) and reel lock release pin (273) are inserted 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)
In other words, as is clear from FIG. Notches (18) and (19) into which the opening members (240) of tape cassettes (1) and (2) are inserted
The difference in distance between the supply reels (3) and (5) is larger than that of the horizontal part (24) of the opening member (240).
The right edge (247) of 3) 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, (228) is an eccentric cam, (229) is a rotation regulating cam, and the peripheral point (228) is the maximum distance d 1 corresponding to the β mode from the rotation center of the eccentric cam (22B).
a) and the peripheral point of the minimum distance d2 corresponding to VHS mode (
228b) are arranged at an angular interval of 180°.

A pair of recesses (2
29a) and (229b) are engraved. Both cams (
22B) and (229) are the maximum and minimum distance points (22B) and (229)
A straight line connecting 8a) and (228b) and both concave portions (229a
) and (229b) so that they are parallel to each other,
It is fixed to the rotating shaft (226) of the worm wheel (225).

(281) is an S-shaped regulation lever, and the support shaft (2B
2) By times! Ij is freely supported, and one end (283) of the regulation lever (281) is rotationally biased clockwise by a spring (284). Regulation lever (2
The claw (285) at the other end of the regulating cam (229) is engaged with the recess (229a) or (229b) of the regulating cam (229), and the connecting member (286) engages the plunger (287).
is connected to the operating rod (288). Lever (281
The lever (289a) of the microswitch (289) is connected to the push button (289b) on the side of one end (283'') of
It is touching 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 parallel to these, a pair of guide members (295), (296) and (297) on the left and right
), (29B) are installed. In addition, (29
9) is the supply reel viewing window.

(301) and (302) are a pair of left and right skein and throat guide plates, each having a notch (301c) and (302c).
) are provided, and the bent portions (303) and (
Link pins (305) and (306) on the top surface of
Also, guide pins (307) and (30B) are 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) and (297), (298'), and is slidably abutted on link pins (305) and (306) and guide pins (307) and (30B).
) are inserted into the long holes (292) and (293) of the top plate (290).

(310) shows the link as a whole and its lever (3
11) is the support shaft (294) installed on the upper plate (290')
It is rotatably supported. A roller (313) is rotatably attached to a shaft (312) provided at one end of the lever (311). Lever (311) Spring (314)
) is rotationally biased counterclockwise by the roller (313
) comes into contact with the eccentric cam (22B). Lever (311
) is provided with a long hole (315') at the other end of the long hole (315').
A link pin (316) is commonly inserted through the elongated hole (291) of the top plate (290). This link pin (
316) and left and right cassette guide plates (301),
(302) link pin (305), (306
) are connected by connecting members (317) and (318), respectively. The above is the configuration of the link (310).

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

When β mode is set by a mode setting switch (not shown), the plunger (287'') is first energized, and the claw (285) of the restriction lever (281) and the restriction cam (2
29) is disengaged from the recess (229b) corresponding to the VHS mode, and the microsinch (2E19) is disengaged from the recess (229b) corresponding to the VHS mode.
) by displacement of the lever (289a), the push button (289
b) is pressed, the microswitch is turned on and power is supplied to the motor (220). And worm wheel (225), gear (227), eccentric cam (228)
and the regulating cam (229) rotates 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 (
287) is appropriately deactivated. As the eccentric cam (22B') rotates, the distance between its center of rotation and the peripheral edge that abuts the roller (313) increases from the shortest d2 to the longest dl.

When both cams (228) 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 (22B) are de-energized.
) is restricted to the position shown in FIG.

As a result of this rotation of the eccentric cam (228), 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
17) and (31B) link pins (
cassette guide plates (301
) and (302) are determined corresponding to the β tape cassette (1).

When switching from β mode to VHS mode, the mode setting switch (not shown) reverses the energization polarity of the motor (220), and the worm wheel (225) etc. rotate clockwise, in the opposite manner to the above. It works, but its detailed explanation 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), (3
35) are integrally provided. VH3 tape cassette (
2) A pair of left and right locking pieces (336) that regulate the amount of insertion.

(337) is integrally provided on the front edge of the bottom plate (331'').The bottom plate (331) is provided with the aforementioned supply reel shaft (201).
and a notch (3) for inserting the take-up reel shaft (211).
3B ) and (339) and end sensor light source (27
1)) is provided, and an opening (341) is provided through which a β-VH3 switching protrusion (355'), which will be described later, is inserted.

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

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

There are guide pins (346) on the outside of (333), respectively.

(347) is established.

(351) is a rocking plate, and a pair of left and right locking pieces (352) and (353) for regulating the amount of insertion of the β tape cassette (1) are integrally provided on its front edge. Beta cassette lid (7) on the side of the stopper (352)
A lock release plate (354) is integrally provided.

Further, the swing plate (351) is provided with an inclined protrusion (355). And the rocking plate (351) is an elastic plate (356)
(357) is connected to the bottom plate (351).

In FIG. 22, (360) is a motor for loading a cassette, and a worm (362) is connected via a shaft (361).
is combined with The worm wheel (363) that meshes with this worm (362) has a first gear (364).
are provided coaxially, and the second. Third. The fourth and fifth gears (
365), (366), (367) and (
36B) are engaged sequentially. (371) is a rotary lever for driving the cassette holder (330), and is disposed coaxially with the fifth gear (368). The end (372) of the rotating 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 a guide pin (346 ) is this guide groove (38
0) and the elongated hole (373) of the rotation lever (371). The guide pin (347) of the other side wall (333) of the cassette holder (330) is also provided with a mechanism similar to the above-described second tooth i (365), and the second gear (365) are connected by a rotating shaft (369).

When the cassette holder (330) is in the position shown by the broken line in FIG. 22, the tape cassette (1) or (2) is inserted. At this time, the aforementioned cassette guide plate (301) (
302) are both side walls (33) of the cassette holder (330).
2), located inside (333), bent part (33
4) (335) is each guide 4 tan (302),
It is located within the notch (302c) and (301c) of (301).

When the β tape cassette (1) is inserted, the lid lock release plate (354) of the rocking plate (351'')
) into the tape cassette (1) and the lid (7).
and the reels (3) and (4) are unlocked simultaneously.

When the VH3 tape cassette (2) is inserted, the inclined protrusion (355) of the rocking plate (351) is pushed down as the cassette is inserted, so that the β locking piece (352)
, (353) and the lid lock release plate (354) are released downward from the bottom plate (331) and do not come into contact with M(8) of the VH3 tape cassette (2). Also, the protrusion (342) on the holder side plate (333) is attached to the tape cassette (2).
), press the lid lock release protrusion (20), and press M (8).
will be unlocked.

When the tape cassette (1) 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 rotation lever (
371) is rotated 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 bending part (3) of the cassette holder (330)
34”), (335) and cassette guide plate (3
01) and (302) are resolved.

The lever (371) continues to rotate and the guide pin (34)
6) Next, at the end of the vertical descent along the guide groove (380), the tape cassette (1) or (2) held in the cassette holder (330) is placed in the positioning bin (251) in a predetermined state. ) , (252) or (2
61), (262), and the reel shafts (201), (211) engage with the reels (31, (4)
Or engages in (5) or (6).

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.

The loading on the drum in the above embodiment is β
This is a case where the U1 coding method used in the VTR system is adopted, but the ML used in the VHS system is
A J-ding method can also be adopted. Below is the second
Referring to FIG. 3, the tape running system and the loading (threading) of the tape onto the tape guide drum in this case will be described.

072), (173) is the tape guide drum (70mm tape inlet αIJ movement guide) in β mode,
(172) is an upright guide, and (173) is a vertical guide. (174) and (175) are V I-I
(174) is an upright guide, and (175) is an inclined guide (the degree of inclination is different from the oblique guide (173) around 1). (176).

(177) is a drum (7o) for both β and VHS modes
(176) is an inclined guide, and (177) is an upright guide. Therefore, the guide (172), (173) or (174),
(175) and guides (176) and (177) pull out the tape (23) or (24) from the cassette (not shown) and wrap it around the drum (70). (170),
(171).

(178) and (179) are fixed guides. (
180) is a capstan, and (181) is a pinch roller.

Next, the running path of the tape wound around the drum (70) will be explained. The tape (23) or (24) fed out from the supply reel (not shown) passes through the guide (1).
70) - Guide (171) - Full width erase head (14
9), the β tape (23) passes through the guide (17).
2) - (173) route, VHS tape (24
) is wound around the drum (70) via the guides (174") and (175). The tape (23) or (24) coming out of the drum (70) is wrapped around the guide (176) - guide (177) - β , VHS common audio erasure Henshita (15
1A)-β voice/control belly button F (15111)
-v■+s audio/control head (151C)-
It passes through the paths of guide (178) - capstan (180) and pinch roller (181) - guide (179) and is wound onto a take-up reel (not shown).

In addition, guide (172), (173) and guide (1
74) (175) means that the unused guides are laid down so that they can be used selectively.

In this case as well, the drum (70) is placed at a predetermined position in the tape width direction of the tape outlet (or tape inlet) of the drum (70), for example, around an axis that passes through the center and is orthogonal to the axis of the drum (70). It is rotated by the difference between the tape lead angles of β and VHS.

The rest of the configuration is similar to the VTR of the above-described embodiment.

〔Effect of the invention〕

As described in detail above, according to the present invention, the reel stand and the switching member are moved a predetermined distance in response to multiple types of tape cassettes, and the reel stand and the switching member are moved by a predetermined distance, and the reel is moved in only one mode by a cam directly connected to the switching member. Since the tape guide is made to undulate (conceal), most of the tape running path can be made common with a simple configuration, and the mechanism can be made smaller.

[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 and a perspective view showing the tape running system of a conventional β-type magnetic recording/reproducing device, and a plan view showing the tape loading process, and FIG. 7, 8, and 9 are perspective views showing a tape running system; FIGS. 7, 8, and 9 are perspective views, side views, and plan views showing a tape guide drum device of an embodiment of the magnetic recording/reproducing apparatus according to the present invention; FIG. is a plan view showing a part of the tape guide drum device shown in FIGS. 7 to 9, and FIGS.
FIG. 13 is a schematic plan view showing the tape guide drum of the tape guide drum device shown in FIGS. 7 to 9, and FIG. 14 is a cross-sectional partial view of each part of the tape guide drum device shown in FIGS. FIGS. 15 and 16 are a plan view showing a tape running system of an embodiment of a magnetic recording and reproducing apparatus according to the present invention, and FIGS. 17 and 16 are perspective views showing a part of the tape running system of FIG. FIG. 18 is a perspective view showing the operating state of the cassette mounting mechanism of an embodiment of the magnetic recording/reproducing apparatus according to the present invention, and FIGS. 19 and 20 are views of the gusset guide mechanism of the embodiment of the magnetic recording/reproducing apparatus according to the present invention. FIG. 21 is a perspective view showing the cassette holder of an embodiment of the magnetic recording/reproducing apparatus according to the present invention, FIG. 22 is a side view showing the drive mechanism of the cassette holder, and FIG. FIG. 7 is a plan view showing a tape running system of another embodiment of the magnetic recording/reproducing apparatus according to the invention. (149), (150) are tape guides, (15
4) is the lever, (156) is the diagonal cam around 1, (157) is the arm, (211) is the reel stand, (217) is the rack,
(220) is the motor, (221) is the worm, (225
) is Wormwheel, (227) is Confederate, (23
0) is a switching member. 6th factor Figure 8 Figure 9 Figure 7 7n

Claims (1)

[Claims] a motor, a deceleration means including a worm gear, a gear means driven by the motor via the deceleration means, a reel stand and a switching member coupled to a rack means that engages with the gear means, and a switching member a tape guide undulation means that engages with the coupled cam means to undulate the tape guide means, and moves the reel stand a predetermined distance in response to a plurality of types of tape cassettes having different sizes; 1. A magnetic recording and reproducing device characterized in that a tape guide means is undulating.