JPS6218641A - Mode detector - Google Patents

Abstract

PURPOSE:To simplify the constitution of a control part by driving a mechanism part connected to a moving means in accordance with each mode by the control part to which the output of a detecting means which counts detected parts to detect each mode is inputted. CONSTITUTION:The stop mode is detected by a detector 239 with a leaf switch 237 turned off in accordance with the number of times of transmission of light of a light source 240 through a detecting hole 71 provided on a cam 65, and a loading motor 55 is stopped by the control signal from a system control 286 to set the stop mode. If a fast forwarding button is turned on in the stop mode, the state is detected by the system control 286, and the loading motor 55 is rotated forward by the control signal of the system control 286, and the cam 65 is rotated clockwise around a supporting shaft 72 up to the fast forwarding/rewinding mode. Pins 80, 179, 216 are moved in cam grooves 68, 67, and 69 simultaneously. The same part to be detected is provided for each mode to simplify the constitution, and the constitution of the control part is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a detection device for detecting each mode in a magnetic recording/reproducing device.

(B) Prior Art Conventionally, a technique for detecting each mode of a magnetic recording/reproducing apparatus has been proposed, for example, in Japanese Patent Application Laid-Open No. 172557/1983. To briefly describe this technology, by rotating the rotating cam while making contact with a specific conductive pattern provided on the rotating surface of the rotating cam and a plurality of contacts fixed at predetermined positions, The contacts were made conductive with each other, and each mode was detected according to the conductive state.

In addition, unlike the contact type mentioned above, a non-contact type technology using a light source and a light receiving element has also been proposed, and a detection hole is interposed between the light source and the light receiving element and is provided in a rotating body etc. to form an optical path. It was possible to change the number of for each mode.

(c) Problems to be Solved by the Invention However, in the former case, there is a problem in that the conductive pattern and the contacts wear out due to long-term use, resulting in poor contact and malfunction of the device. Also, in the latter case,
Since the number of detection holes had to be changed for each mode, there were problems such as the configuration of the control unit becoming a double ball.

(d) Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and includes a magnetic recording/reproducing device having a stepped portion on its periphery and a plurality of steps for detecting each mode. a moving means having a detected portion; and a retaining portion that engages with the peripheral edge and the stepped portion;
The number of detected parts is counted without contacting the detected part, using a switch means that operates according to the engaged state and the engaged position of the engaging part with respect to the boundary between the peripheral edge and the stepped part as a reference. The mode detecting device includes a detecting means for detecting each mode, and a control section to which the output of the detecting means is input drives a mechanical section connected to the moving means according to each mode.

(e) Operation According to the mode detection device of the present invention, by using the position where the engaging portion provided in the switch means engages with the periphery of the moving means and the boundary of the stepped portion as a reference, the number of detected portions is determined by the detecting means. is counted, each mode is detected, and the -C mechanism is driven according to each mode by the control signal at this time.

(f) Example The details of the present invention will be specifically explained with reference to illustrated embodiments.

1 and 2 are plan views showing the mode detection device of the present invention, FIG. 3 is a side view of the main parts of FIGS. 1 and 2, and FIGS.
FIG. 10 shows each mode of eject, remaining tape, stop, fast forward, 7 rewind, record/play, pause, and rewind play in a magnetic recording and reproducing apparatus using the mode detection device of the present invention, and shows the chassis. Plan view in transparent state, 11th
The figure is a plan view of a magnetic recording/reproducing device using the mode detecting device of the present invention, seen from the front, FIG. 12 is a plan view of FIG. 11 seen from the back, and FIG. 14 to 20 are side views showing a magnetic recording and reproducing apparatus using the mode detection device of the present invention, in which eject, tape remaining amount, stop, fast forward 7 rewind,
Side view showing the relationship between the rotary lever and the ohm shaft in each mode of recording/playback, pause, and rewind playback, No. 21
22 is a plan view showing a tape loading mechanism provided in a magnetic recording/reproducing device using the mode detecting device of the present invention, and FIG. 22 is a tension arm provided in the magnetic recording/reproducing device using the mode detecting device of the present invention. FIGS. 23 and 24 are cross-sectional views showing the state in which the sector gears are coupled, and FIGS. 23 and 24 show a state in which multi-pole magnets are coupled to the lower surfaces of the reel stand and pinch roller of a magnetic recording and reproducing apparatus using the mode detection device of the present invention. 25 is a side view showing a magnetic recording/reproducing device using the mode detecting device of the present invention for front cassette loading, and FIG. 26 is a magnetic recording device using the mode detecting device of the present invention. FIG. 27 is a side view showing a state in which the playback device is adapted for loading a top cassette, and FIG. 27 is a plan view of a main part showing the inside of the tape cassette.

To explain the figure numbers and configurations for Figures 1 to 27,
(1) is a cylinder base fixed to the chassis (2), (3) is a cylinder placed on the cylinder base (1), (4) is a full-width erasing head, (5) is an impedance roller, (6) is a mounting table on which a sound erasing head (7) and a sound control head (8) are mounted, and which is elastically held by a spring (10) around a support shaft (9) installed on the chassis (2); 11) has a taper on which the mounting table (6) comes into contact, and the support shaft (9)
), (12) and (13) are tape guide pins installed on the chassis (2), and (14) and (15) are Loading posts and inclined balls (18) and (19) are implanted on a sliding body (17) that slides in a loading groove (16) provided in the chassis (2).
), a loading post and an inclined pole are installed on a sliding body (21) that slides in a loading groove (20) provided in a loading groove (20), (22) is a bearing fully connected to the chassis (2), and (23) is a pin. (24), is coupled to a support shaft (25) that is loosely fitted into the bearing (22>), and is elastically held by a spring (27) that is engaged between one end of the support shaft (25) and a stopper (26). A tension arm (28) is connected between the locking device (29) and the tension arm (23), and a band brake (31) is connected to one end thereof and a band brake for brake-holding the supply reel stand (30). a brake piece (35) that is elastically held around the support shaft (34) by a spring (33) fully engaged between the brake pieces (32) and that brakes and holds the supply reel stand (30) via the band brake (28); ) is elastically held around the spindle (38) by the spring (37) fully locked between its one end and the locking tool (36), and the brake shoe (39) is brought into pressure contact with the take-up reel stand (40). The brake piece that holds the brake,
(41) is elastically held around the support shaft (44) by a spring (43) that is locked between one end of the spring (41) and the locking tool (42), and the brake shoe (45) is brought into pressure contact with the take-up reel stand. (40) Brake piece that holds the brake, (
46) is a gear (46) provided on the supply reel stand (30).
47) and rotates around a support shaft (49) installed on the sub-chassis (48) coupled to the back side of the chassis (2), (50) being coaxial with the gear (46); A gear (51) having friction is meshed with a gear (52) provided on the take-up reel stand (40), and is connected to a support shaft (5) installed on the sub-chassis (48).
3), the gear (54) rotates around the gear (51);
) and a gear that is coaxial with and has friction, (5
5) is a loading motor, (56) is a pulley that is press-fitted into the morph shaft (57) of the loading motor (55), and (58) is a pulley (60) that is press-fitted into the morph shaft (57) of the loading motor (55).
) and is rotated by the driving force of the loading motor (55) transmitted by a belt (61) stretched between the pulleys (56) and (60);
(62) is a gear to which the driving force reduced by the ohm gear (58) is transmitted and rotates around a support shaft (63) installed on the back side of the chassis (2); (64) is the gear A gear coaxial with and coupled to (62), (
65) a gear (66) meshing with the gear (64);
A cam groove (67) provided on the surface having the gear (66)
cam grooves (68) and (69) provided on the surface opposite to the surface having the gear (66), and a notch (70) as a stepped portion provided in a part of the periphery; A circular cam (73) is composed of a detection hole (71) as a detected part for mode selection, and is a moving means that rotates around a support shaft (72) installed on the back side of the chassis (2). A housing (74) is connected to the back side of the chassis (2) to protect the loading motor (55), and a long hole (75) in which the support shaft (72) is guided, the housing (73)
) into which the pins (76) and (77) are guided.
78) (79), the regulating piece (284), and the cam groove (
A moving lever (81) is provided with a pin (80) for moving the moving lever (68), and (81) is pivotally supported by the moving lever (74), and a spring latched to one end of the moving lever (74) and one end of the moving lever (74). (82) is a rotary lever that is elastically held around the support shaft (83) and is provided with a locking piece (84) that locks on the rotating shaft (59); A link (87), which is pivotally supported by a shaft (74) and rotates around a support shaft (8G), has a pin (88>), and one end of which is fully connected to the link (85) and is connected to the chassis (2). The link (90) rotates around a support shaft (89) installed on the back side, and the link (90) is a long hole (93) (94) through which the pin (91) (92) installed on the chassis (2) is guided. )
, a long hole (95) in which the pin (88) of the link (87) is guided, a cam (285), and pins (96) (97).
a link (10
0) is connected to the subchassis (48) by a spring (102) locked between one end of the spring (102) and a locking tool (101).
) The link (104) is elastically held around a support shaft (103) installed on the back side of the sub-chassis (48), and the link (104) has a length that allows the pin (105) installed on the sub-chassis (48) to be guided and loosely fitted. a hole (106), a lower side surface (1) of the gear (46);
07), a brake shoe (110) that is pressed against the lower side surface (109) of the gear (51), and one end of the link (100) is connected to the support shaft (283). Brake pieces combined as (1
11) is connected to the subchassis (4) by a spring (113) locked between one end of the spring (113) and a locking tool (112).
The cam (90) of the link (90) is held elastically around the support shaft (114) installed on the back side of the link (90).
The link (116) is provided with a pin (115) that slides on the subchassis (48), and one end of the link (116) is connected to the link (111), and the support shaft (117) is installed on the back side of the subchassis (48). A link that rotates around the center, (118) is a link that is fully connected using one end of the link (116) as a support shaft (279), (119) is a support shaft (120) implanted in one end of the link (11B) Rotate around the side (
107) An idler (121) made of rubber or the like that is pressed against (109) has pins (122) and (123), and rotates around a support shaft (124) planted on the back side of the chassis (2). The movable link (125) has an elongated hole (126), and a support shaft (127) installed on the back side of the chassis (2).
) The link (128) rotates around the elongated hole (1
pin (129) guided by the chassis (26);
) and an engagement piece (134), through which the pins (130) and (131) are guided.
(135) having said pin (130) (1
(140) is a link having elongated holes (136) and (137) through which the link (31) can be guided, an engagement piece (13B) that engages with the engagement piece (134), and a clamping piece (139); ) (135); springs (143) that are fully locked into the locking holes (141) and (142) and elastically hold the two;
has a pin (144) held by the holding piece (139), and a support shaft (145) coaxial with the take-up reel stand (40).
), the link (146) rotates around the link (
The idler (149) is made of rubber or the like and is rotatably supported around a support shaft (147) implanted at one end of the pulley (148), (149) is a pin (150).
and a protruding piece (151>), one end of which and a locking tool (15
2) The spring (153) fully engaged between the shafts (154) installed on the back side of the sub-chassis (48)
), the link (155) is elastically held around the elongated hole (156) in which the pin (150) is guided and the protrusion (1
(57), and a link (159) that rotates around a support shaft (158) implanted on the back side of the subchassis (48);
) is a capstan motor, (160) is a brake shoe (161) that holds the capstan motor (159), and a spring that is locked between one end of the brake shoe (161) and a locking hole (162). (163), a brake piece (165) is elastically held around a support shaft (164) installed on the back side of the chassis (2), and (165) is coaxial with the capstan motor (159), and The pulley (166) fully connected to the stun motor (159) is connected to the support shaft (16) installed on the back side of the sub-chassis (48).
The pulley (168') rotates around the belt (168') which rotates around the belt (165) and (166).
9) is a gear coaxial with the pulley (166) and coupled to the pulley (166), and (170) is a support shaft (171) that passes through the subchassis (48) through a bearing (not shown). A gear (172) is a rotating body coupled to the shaft (171), and (173') is a rotating body coupled to the shaft (171) and meshes with the gear (169). The meshing gear (174) has a pin (175) at one end thereof, and a rotation arm (176) that is in a friction relationship with the support shaft (171) and rotates around the shaft (171). ) is a gear idler coupled rotatably around a support shaft (177) implanted at the other end of the rotating arm (174); (178) is a pin (179) that moves in the cam groove (67); and pins (180) (181) planted on the back side of the chassis (2).
) are guided through the elongated holes (182) and (183), (184) are the cams (185) and (286), and the gear (1
86), and a pin (1) implanted on the chassis (2).
87) (188) is guided through the elongated hole (189>(190)
), the link (192) is connected to the link (178) and is elastically retained by a spring (191) that is locked between one end of the link (178) and the locking tool (36);
) has a gear (193) that meshes with the gear (186) and a pin (194), and a link (196) that rotates around a support shaft (195) installed on the chassis (2);
) has a pin (197) and a protrusion (278), and rotates around a support shaft (198) implanted on the chassis (2), and (199) is a pinch roller arm ( 196) A pinch roller that rotates around a support shaft (200) provided above, (201) is a capstan, (
202) is a long hole (20) in which the pin (194) is guided.
3) and a link coupled to said pin (197);
(204) is a long hole (2) through which the pin (197) is guided.
05) and is connected to the pin (194), (206) is a compressed spring that is fully engaged between the links (202 and 204), and (2o7) is the link that is connected to the pin (204).
8), the link <211) is elastically held by a spring (209) and rotates around a support shaft (210) planted on the chassis (2);
Bearing 1), (212) is a link that has a pin (213) and rotates around a support shaft (214) implanted on the back side of the chassis (2), and (215) is a link that has a pin (213) and is connected to the cam groove (69). ), the fan-shaped gear (21
8) is a link whose one end is connected to the sliding body (17) and whose other end is connected to the link (220) that engages the notch (219); (221) meshes with the sector gear <215);
A gear (223) is a pin that moves in the notch (219); 224), coaxial with the gear (221) and coupled to the gear (221);
(225) is the link (220) and pin (224)
A spring (226) is locked between the links, one end of which is fully connected to the sliding body (21), the other end of which is fully connected to a link (228) having a notch (227), and (229) a link that is fully connected to the notch (227). a pin (230) that moves within the chassis (227) and meshes with the gear (223);
) and rotates around a support shaft (231) that passes through one end of the link (22B), <2
32) is a spring locked between the link (22B) and the pin (230), (233) is a multi-pole magnet fixed to the lower surface of the supply reel stand (30), (234)
(2) is a detector that detects the rotation speed of the magnet (233);
35) is a multi-pole magnet fixed to the lower surface of the pinch roller (199), (236) is a detector for detecting the rotation speed of the magnet (235), and (237) is a protrusion (237) as an engaging portion. A leaf switch (239) as a switch means having a light source (238) is connected to a light source (239) through the detection hole (71).
a detector for detecting the number of times of light from (240), (286)
(241) is a cassette stage which has a pair of pins (242) on its side and on which a tape cassette (243) is placed; (280) is a chain double-dashed line; The magnetic tape shown in (
281) (282) is a reel hub; (244) is a vertical plate provided on one side of the chassis (2), having a guide groove (245) for sliding the pin (242);
246) has a guide groove (not shown) for sliding a pin (not shown) that is a pair with the pin (242), and a vertical plate provided on the other side of the chassis (2); 24
7) is a horizontal plate provided on the vertical plate (244) and is horizontal to the chassis (2); (248) is an ohmic axis passing through the horizontal plate (247); and (249) is the ohmic axis. Ohm gear (25g) connected to shaft (24g)
0) is a pulley connected to the ohmic shaft (248);
(251) is a belt hung between the pulleys (148) and (250), and (252) is the ohm gear (249).
) and rotates around a support shaft (253) provided on the vertical plate <244'), (254) is coaxial with the gear (252) and can be coupled to the gear (252). The gear (255) meshes with the gear (254) and supports the support shaft (25) provided on the vertical plate (244).
The gear (257) rotates around the pin (2).
42), and has a gear (259) that meshes with the gear (255), and rotates around a support shaft (260) provided on the vertical plate (244). A rotating arm that rotates while holding the pin (242) in a pair is not shown;
) is placed on the cassette stage, (262) is the notch (
263), and the cassette stage (261') is rotatably coupled to a support shaft <264) provided on the side surface of the cassette stage (261), and is provided at one end thereof. The link (267) has a pin (265) inserted into the hole (266), and the link (267) is connected to the support shaft (264), and the pin (268) provided at one end thereof is inserted into the elongated hole (269). a vertical plate provided on one side of the chassis (2), the link (270) having a long hole (272) through which a pin (271) provided at the other end of the link (267) is guided; (273) is a horizontal plate provided on the vertical plate (270) and is horizontal to the chassis (2), (248) is an ohmic axis passing through the horizontal plate (273), and (274') is the horizontal plate that is horizontal to the chassis (2). Vertical board (270)
A shaft (275) passes through the shaft and is connected to the other end of the link (262), and the shaft (275) has a pin (276) that moves within the notch (263) and connects the ohm gear (24).
a sector gear (277) meshing with the link (262) and the pin (274) and coupled to the shaft (274);
Although not shown here, the spring is locked between the link (262) <267> and the hole (276).
266), long hole (269), support shaft (264), vertical plate (
270), sector gear (275), and spring (27
7) is also symmetrically provided on the other side of the chassis 2), and the shaft (274) passes through its vertical plate (not shown). The mechanism section includes the moving lever (74), the link (178), and the sector gear (215).
), and the detection means includes the detector (239) and light? jX (240).

Hereinafter, the operation of the brake device of the present invention will be explained for each mode. Here, in Figs. 14 to 20, the motor shaft (5
The counterclockwise rotation in 7) is defined as forward rotation, and the clockwise rotation is defined as reverse rotation. First, in the eject mode shown in FIG. 4, the loading motor (55) is stopped at this time, and the components present in the transmission path of the driving force of the loading motor (55) are not driven. Also, the supply reel stand (
A brake piece (31) via a band brake (28) is in pressure contact with the side surface of the take-up reel stand (40).
On the side of the brake shoe (39) of the brake piece (35)
) are in pressure contact with each other, and brake pieces (10
The brake shoes (108) (110) of 4) are in pressure contact. In addition, the idler (146) is connected to the capstan motor (
For the link (135) that is brought into contact with the side surface of (159),
The link (128) is moving against the elastic force of the spring (140), and from this, the idler (146) is connected to the capstan motor (159) in order to ensure that the driving force of the capstan motor (159) is fully transmitted. is in pressure contact with the side of the Here, as shown in FIG. 14, the locking piece 84) is not locked to the ohmic shaft <59).

Then, from the above-mentioned state, as shown in FIG. 25, when the tape cassette (243) is placed on the cassette stage (241) and pressed in the insertion direction, a microswitch (not shown) is turned on at the predetermined position, and the system The controls work. At this time, the capstan motor (159) rotates clockwise in response to a control signal from the system control (286>), and the idler (146) and pulley (148) rotate counterclockwise around the support shaft (147>). The rotational force is transmitted to the pulley (250) via the bell 1-(251) and rotates the ohm gear (249).The rotation of the ohm gear (249) causes the gear (252)<254
) rotates clockwise around the support shaft (253), and the gear (255) rotates counterclockwise around the support shaft (256), and the rotating arm (257) rotates clockwise.From this, U
The bottle (242) held in the groove (258) is inserted into the guide groove (
245), that is, the cassette stage (241) moves and the tape cassette (243) is moved to the supply reel stand (3).
0) and the take-up reel stand (40). Furthermore, the mounting of the tape cassette (243) on the supply reel stand (30) and take-up reel stand (40) is not only limited to that shown in FIG. 25, but also the clockwise rotation of the capstan motor (159) The configuration shown in FIG. 26 may be used, and its operation will be explained below. First, tape cassette (24
3) is placed on the cassette stage (261), a microswitch (not shown) is turned on, the system control (286) is activated, and the control signal causes the capstan motor (159) to rotate clockwise. This causes the ohm gear (249) to rotate, and the sector gear (275) to rotate.
rotates clockwise around the support shaft (274),
Link (262) due to the elastic force of spring <277>
also rotates clockwise around the support shaft (274). The rotation of this link (262) causes the cassette stage (26
1) is pushed down, and the bottles (268) (271) provided in the link (267) are pushed down into the long holes (259) (272).
), and the tape cassette (243) is placed on the supply reel stand <30> and the take-up reel stand (40).

After that, the fan-shaped gear (275) has a notch (
The tape cassette (243) rotates clockwise about the support shaft (274) against the elastic force of the spring (277) until it comes into contact with the supply reel stand (30) and the take-up reel stand (263). 40) It will be securely placed on top.

Here, the rotational force of the pulley (165), which rotates clockwise together with the capstan motor (159), is applied to the belt (168).
The transmission is completed to the pulley (166) through the gear (
169) and (170), the rotating arm (174)
) tries to rotate counterclockwise around the support 1I8II+ (172), but as the pin <175) comes into contact with the projection (151), the rotating arm (174) and the support shaft (1
71), and as a result, the gear idler (176) rotates clockwise around the support shaft (177) but does not mesh with the gear (54).

As mentioned above, when the tape cassette (243) is placed on the supply reel stand <30) and the take-up reel stand (40), another micro switch (not shown) is turned on and the system control (286') The loading motor (55) rotates forward in response to the control signal. The rotational force is transmitted to the ohm shaft (59) via the pulley (56), belt (61) and pulley (60), and is transmitted to the ohm gear (59).
8) tl - Rotate. The rotation of the ohm gear (58) causes the gears (62) and (64) to rotate counterclockwise around the support shaft (63), and the engagement of the gears (64 and 66) causes the cam (65) to move from the position shown in FIG. Rotate clockwise around the support shaft (72) until the tape remaining amount mode shown in FIG. 5 is reached. At this time, the pin (80) provided on the moving lever (74), the pin (179) provided on the link (178), and the fan-shaped gear (
Each pin (216) provided on the cam (65)
cam grooves (68), (67), and (69) provided at the same time.

When the pin (80) moves in the cam groove (68), the support shaft (7
2) and pins (76) (77) are long holes (75) (78)
(79), the moving lever (74) moves upward. Here, as shown in FIG. 15, the rotating lever (81) rotates clockwise about the support shaft (83) against the elastic force of the spring (82), but the locking piece (84) It does not lock onto the ohmic shaft (59). At this time, the link (85) rotates slightly clockwise about the support shaft (86), and
7> rotates clockwise around the support shaft (89). As the link (87) rotates, the pins (91) and (92) move into the long holes (
93) and (94), the link (90) moves to the left against the elastic force of the spring (99). Then, the pin (96) provided on the link (90) moves to the left and presses the link (100), thereby causing the link (1
00) rotates clockwise around the support shaft (103) against the force of the spring (102) (7)'313, which causes the brake shoes (108) (110) to move against the side surface (10).
7) Separated from (109). Further links (9
Since the pin (97) provided on the link (125) also moves to the left, the engagement of the pin (97) with the link (125) is released. Then, the idler (146) is separated from the side surface of the capstan motor (159) by the elastic force of the belt (251>), and the link (143) is moved away from the support shaft (145).
The engagement piece (134X) rotates clockwise around
138) engage with each other, and the links (128) and (135) move downward. Also, the pin (129) is in the long hole (126).
is fully guided, and the link (125) rotates clockwise around the support shaft (127). Therefore, since the idler (146) is spaced apart from the side surface of the capstan motor (159), even if the capstan motor (159) continues to rotate clockwise, the rotational force is not transmitted to the idler (146). First, the tape cassette (243) is properly placed on the supply reel stand (30) and the take-up reel stand (40).

Also, the cam (285) of the link (90) moving to the left
The pin (115) slides, and the link (111) rotates counterclockwise about the support shaft (114) due to the elastic force of the spring (113). From this, the link (116) rotates clockwise around the support shaft (117), and the idler (1
19) is pressed against the rotating body (172) via the link (118).

When the pin (216) moves in the cam groove (69), the cam groove (69) is concentric with the cam (65) in this range, so the fan-shaped gear (215) does not rotate, but in its transmission path. Components present in are not driven.

When the pin <179) moves in the cam groove (67>), the pin (
180) (181) are guided through the elongated holes (182) (183), and the link (178) moves to the left. Furthermore, the pins (187) and (188) are guided through the elongated holes (189) <190>, and the link (184) also moves to the left. The link (192) is then meshed with the gears (186) and (193).
> rotates clockwise around the spindle (195), and connects the pinch roller arm (1
96) connects the pinch roller (199) to the capstan (2).
01) and rotates counterclockwise around the support shaft (198) without being brought into pressure contact with the support shaft (198). At this time, the link (207) is pressed by the projection (27g) and rotates clockwise about the support shaft (210) against the elastic force of the spring (209).

When the protruding piece (238) enters the notch 70), that is, the leaf switch (237) is turned off, the cam (
A light source (240) that passes through a detection hole (71) provided in
) The detector (239) detects the tape remaining amount mode from the number of times the light is emitted, and the loading motor (55) is temporarily stopped by a control signal from the system control (285).

Here, since the capstan motor (159) continues to rotate clockwise as described above, the rotating body (172) rotates counterclockwise. The rotational force causes the link (11
8) is the side (10) with the idler (119) stopped.
The idler (119) rotates in the direction of the hour hand around the support shaft (279) until it comes into pressure contact with the support shaft (120).
Rotate clockwise around the center. From this, the gear (51) rotates counterclockwise around the support shaft (53), and the gear (51) rotates counterclockwise around the support shaft (53).
) (52) rotates the take-up reel stand (40) clockwise. Therefore, the supply reel stand (30) also rotates clockwise via the magnetic tape (280).

Now, the magnetic tape (280) is prevented from touching the capstan (201) by the link (207), and the pinch roller (
The magnetic tape (280) is in contact with the spindle (200) and rotates clockwise due to the take-up reel stand (40) and the supply reel stand (30). (199) can be rotated counterclockwise. The rotation speed of the pinch roller (199) is detected by a magnet (235) and a detector (236) fixed to the bottom surface of the pinch roller (199).
199) rotates a predetermined number of times, the clockwise rotation of the capstan motor (159) is stopped by a control signal from the system control (286). Therefore, the rotation speed of the supply reel stand (30) at this time is determined by the magnet (2) fixed to the bottom surface of the supply reel stand (30).
33) and a detector (234), and calculates the remaining amount of time that can be recorded on the magnetic tape (280).

Furthermore, when the clockwise rotation of the capstan motor (159) stops, the capstan motor (159) rotates counterclockwise in response to a control signal from the system control (286). From this, the rotating body 72) rotates clockwise, and the idler (119) to which the rotational force is transmitted,
The link (118) rotates counterclockwise around the support shaft (279), and the side surface (107)
press against. The gear (
46) rotates clockwise around the spindle (49), and the supply reel stand (30) is rotated by the meshing of the gear (46>(47)).
rotates counterclockwise. From this magnetic tape (280
), the take-up reel stand (40) also rotates counterclockwise, and the magnetic tape (280) further rotates the pinch roller (199) clockwise around the spindle (200) while running to the left. I'm letting you do it. The rotation speed of this pinch roller (199) is determined by the magnet (235) and the detector (236) as described above.
), and when the pinch roller (199) rotates by the predetermined amount described above, a control signal from the system control (286) allows the capstan motor (159) to stop rotating in the counterclockwise direction. Therefore, magnetic tape (
280) is rewound to its original position.

An example of a method for calculating the remaining recordable time on the magnetic tape (280) will be described below. Reel hub (281) (282
) radius is r, and the magnetic tape (2
The radius of the wound state of the magnetic tape (280) is R, and the radius of the magnetic tape (280
) is μ, and the length of the magnetic tape (280) completely wound around the reel hub (281) is 2, then P=π(R”−
r")/μ......■, and if the running speed of the magnetic tape (280) is ν and the remaining amount time corresponding to ri is T, then from the formula (■), T=π(R"-r") /μν
・・・・・・■. Here, the number of pulses generated when the supply reel stand (30) rotates once is N, and the length of the magnetic tape (280) that runs when the pinch roller (199) is rotated a predetermined number of times (for example, 5 rotations) is X.
, If the number of pulses generated by the supply reel stand (30) rotating when the magnetic tape (280) runs is n, then ■
From the formula, T = (x”N”/4 rrμν)X(1
/n”)-π% /μν ・・・・・・
■It becomes. Therefore, the remaining amount time T can be calculated by inputting the necessary conditions shown on the right side of Equation 0 to a calculation means (not shown) or the like.

As mentioned above, the magnetic tape (280) is
When the is rewound to its original position, the loading motor (
55) rotates in the forward direction, and the cam (65) rotates clockwise around the spindle (72>) to the stop mode shown in FIGS. The respective cam grooves (68)<67) and (69) are moved simultaneously.

When the pin (80) moves in the cam groove (68), the support shaft (7
2) and pins (76) (77) are long holes (75) (78)
(79) is completely guided, and the moving lever (74) moves downward. Here, as shown in FIG. 16, the rotating lever (81) is rotated counterclockwise around the support shaft (83) by the elastic force of the spring (82), and the locking piece (84) is attached to the ohm shaft. (59) does not lock. At this time, the link (85) is the support shaft (
The link (86) rotates slightly counterclockwise in the direction of the hour hand.
7) rotates counterclockwise around the support shaft (89). The pins (91) and (92) are guided through the elongated holes (93>(94) by the rotation of the link (87), and the link (90) is moved to the right by the elastic force of the spring (99). The pin (96) provided on the link (90) moves to the right and the engagement of the pin (96) with the link (100) is released, causing the link (100) to release the spring (
The elastic force of the brake shoe (102) causes the brake shoe (108) to rotate counterclockwise around the support shaft (103).
110) are pressed against the side surfaces (107) and (109).

At the same time, the cam (285) of the link (90) moves to the right.
), and the link (111) rotates clockwise about the support shaft (114) against the elastic force of the spring (113). From this, the link (116) rotates counterclockwise around the support shaft (117), and the idler (119) is connected to the rotating body (172) via the link (118).
).

At this point, set the capstan motor (
Even after the counterclockwise rotation of the gears (46) and (51) is stopped, the gears (46) and (51) try to rotate clockwise around the support shafts (49) and (53) due to their inertia. (109) and the brake shoe (110), the brake piece (104) is
83) in a counterclockwise direction to increase the pressing force of the brake shoe (110) against the side surface (109). Take-up reel stand (4o) and supply reel stand (
30) is reliably stopped via the magnetic tape (280).

When the pin (216) moves in the cam groove (69), the cam groove (69) is concentric with the cam (65) in this range, so the fan-shaped gear (215) does not rotate, but in its transmission path. Components present in cannot be driven.

When the pin (179) moves in the cam groove (67), the pin (
180) (181) are guided through the elongated holes (182) (183), and the link (178) moves to the right. Furthermore, the pins (187) and (188) are guided through the elongated holes (189 and 190), and the link (184) also moves to the right. Then, due to the meshing of the gear (186) < 193), the link (192)
) rotates counterclockwise around the spindle (195), and the pinch roller arm (196) rotates around the link (202) (204
), it rotates clockwise about the support shaft (198) and separates from the magnetic tape (280). At this time, link (
207) is released from the suppression by the projection (27B>), rotates counterclockwise about the support shaft (210) by the elastic force of the spring (209), and comes into contact with the bearing (211).

And with the leaf switch (237) turned off,
The stop mode is detected by the detector (239) from the number of times the light from the light source (240) passes through the detection hole (71) provided in the cam (65), and the system control (286)
), the loading motor 55) is stopped and enters a stop mode.

When the fast forward button (not shown) is turned on from the stop mode shown in FIG.
6), the loading motor (55) rotates forward in response to the control signal, and the cam (65) rotates clockwise around the spindle (72) until the fast forward 7 rewind mode shown in FIGS. Rotate in the direction. and pin (80) (179
) (216) are the cam grooves (68) (67) (69), respectively.
move at the same time.

When the pin (80) moves in the cam groove (68), the support shaft 7
2) and pins (76) (77) are long holes (75) (78)
(79), the moving lever (74) moves upward. As shown in FIG. 17, since the locking piece (84) comes into contact with the ohmic shaft (59), the rotation lever (81)
) is the support shaft (83) against the elastic force of the spring (82).
Using the rotational force of the ohmic shaft (59) which rotates clockwise around the center and then counterclockwise, the rotating bar (81) is rotated by the elastic force of the spring (82). (83) in a counterclockwise direction, and the locking piece (84) locks with the ohmic shaft (59). At this time, the link (85) rotates slightly clockwise around the support shaft (86), and the link (87) rotates clockwise around the support shaft (89). The rotation of the link (87) causes the link (90) to release the spring (9) in the same way as in the tape remaining amount mode described above.
9) to the left, separating the brake shoes (108) (110) from the side surfaces (107) (109) and moving the idler (119) towards the rotating body (172).
).

When the pins (216) (179) move in the cam grooves (69) (67), the cam grooves (69) (67) are concentric with the cam (65) in this range, so the sector gear (215)
and links (178) are inoperative and the components present in their transmission paths are not driven.

The projecting piece (238) is pushed out from the notch (70),
That is, with the leaf switch (237) turned on, the fast forward 7 rewind mode is detected by the detector (239) from the number of times the light from the light source (240) passes through the detection hole (71), and the system control (286) ) The loading motor (55) is stopped by a control signal from.

When the loading motor (55) stops, the capstan motor (159) rotates clockwise at high speed in response to a control signal from the system control (286), and the rotating body (
172) rotates counterclockwise. Due to the rotational force, the link (118) rotates clockwise around the support shaft (279) until it comes into pressure contact with the side surface (109) with the idler (119) stopped, and then the idler (119) It rotates clockwise about the axis (120).

As a result, the gear (51) rotates counterclockwise around the support shaft (53), and the winding table (40) rotates clockwise at high speed due to the meshing of the gears (51) and (52). Therefore, the supply reel stand (30) also rotates at high speed clockwise via the pinch roller (199) and the magnetic tape (280) that is not in contact with the capstan (201), and the magnetic tape (280)
) is wound onto the reel hub (282) side.

Also, if you turn on the rewind button (not shown) from the stopped state,
As in the above-mentioned fast forward mode, the locking piece (84) locks on the ohm shaft (59) as shown in FIG. 119) is pressed against the rotating body (172).

Then, the system control (286) (7) control signal causes the capstan motor (<159) to rotate counterclockwise at high speed, contrary to the above-mentioned fast forward mode, and the rotating body (
172) rotates clockwise. Due to the rotational force, the link (118) rotates counterclockwise around the support shaft (279) until it comes into pressure contact with the side surface (107) with the idler (119) stopped, and then the idler (119) It rotates counterclockwise around the support shaft (120). From this, the gear (46) rotates clockwise around the support shaft (49),
By meshing gears (46) and (47), supply reel stand <3
0) rotates counterclockwise at high speed. Therefore, the take-up reel stand (40) also rotates at high speed counterclockwise via the pinch roller (199) and the magnetic tape (280) that is not in contact with the capstan (201), and the magnetic tape (280) is rotated at high speed in the counterclockwise direction. rolled up on the side.

From the fast forward 7 rewind mode shown in Figure 7 above, press the stop button (
(not shown) is turned on, this state is detected by the system control (286), and the control signal stops the high-speed rotation of the capstan motor (159) clockwise or counterclockwise, and the loading motor ( 55) rotates in the reverse direction 17, and the cam (65) rotates counterclockwise around the support shaft (72) from FIG. 7 to FIG. 6. And the pin (
80) (179X216) respectively, and the cam grooves (68) (6
7) Move (69) at the same time.

When the pink 80) moves in the cam groove (68), first the ohmic shaft (59) rotates clockwise in FIG.
Due to the friction generated between them, the rotating lever (81) rotates clockwise about the support shaft (83) against the elastic force of the spring (82), and the locking piece (84) is rotated against the ohmic shaft (59). ) is released, turn the rotation lever (81
> is supported by the support shaft (83) due to the elastic force of the spring (82).
Rotate counterclockwise around the center. Here, the pin (80) is movable even when the cam (65) is stopped, that is, it is located in part A of the cam groove (68) shown in FIGS. The locking piece (84) can be released from the ohmic shaft (59) by only a slight rotation (about 1/4 turn) of the ohmic shaft (59). Therefore, almost simultaneously with the start of rotation of the loading motor (55), the locking piece (84) is released from the ohmic shaft (59), and the support shaft (7) is released from the locking piece (84).
2) and pins (76) (77) are long holes (75) < 78)
(79), the moving lever (74) is guided by the cam groove (6
8) Instantly move downward within the range of part A. At this time,
Links (85) (87) (90) (100) (111)
(1U6) By the operation of (Us), the idler (119)
are instantly separated from the rotating body (172), and the brake shoes (10B) (110) are moved away from the side surfaces (107) (10
9) Press instantly.

When changing from the fast forward mode to the stopped state, even after the capstan motor (159) has stopped rotating at high speed in the clockwise direction, the gears (46) and (51) will continue to move toward the support shafts (49) and (53) due to their inertia. tries to rotate counterclockwise around the center, but the side (107) and brake shoe (1
08) Brake piece (104) due to the friction between
rotates clockwise around the support shaft <283>, thereby increasing the pressure of the brake shoe (108) against the side surface (107). Furthermore, when changing from the rewind mode to the stop state, even after the high-speed rotation of the capstan motor (159) in the counterclockwise direction has stopped, the gear (46
) tries to rotate clockwise around the support shaft (49x53) due to its inertia, but the brake piece (104) rotates around the support shaft (283) due to the friction between the side surface (109) and the brake shoe (110). It rotates counterclockwise, and the pressing force of the brake shoe <110) against the side surface (109) increases.

Therefore, the take-up reel stand (40) and the supply reel stand (30)
is stopped reliably and instantaneously via the magnetic tape (280). Thereafter, the bottle (80) moves along the cam groove (68) to the position shown in FIG. 6 and stops.

When the pins (216) (179) move in the cam grooves (69) (67), the cam grooves (69) (67) are concentric with the cam (65) in this range, so the sector gear (215)
and links (178) are inoperative and the components present in their transmission paths are not driven.

Then, when the protruding piece (238) enters the notch (70), that is, the leaf switch (237) is turned off, the detector (239) is determined from the number of times the light from the light source (240) passes through the detection hole (71). The stop mode is detected, and the loading motor (55) is stopped by a control signal from the system control (286) to enter the stop mode.

From the stop mode shown in Figure 6 above, press the record button (not shown).
Alternatively, when the playback button (not shown) is turned on, this state is detected by the system control (286), and the loading motor (55) rotates forward in response to the control signal, and the cam (
65) rotates clockwise around the support shaft (72) from FIG. 6 to the recording/reproduction mode shown in FIG. The pins (80), (179), and (216) are respectively connected to the cam groove (68).
(67) and (69) at the same time, and then move the cylinder (3
) rotates at high speed.

When the pin (80) moves in the cam groove (68), the support shaft (7
2) and pins (76) (77) are long holes (75) (78)
(79) is completely guided and moves/<-(74) moves upward. Then, as shown in Fig. 18, the locking piece (84) comes into contact with the ohmic shaft 59), and the rotating lever (81) moves the support shaft (83) against the elastic force of the spring <82). The rotating lever (8
1) is supported by the support shaft (83) by the elastic force of the spring (82).
) in the counterclockwise direction. In addition, the rotation lever (8
1) comes into contact with the regulating piece (284) of the moving lever (74) due to the elastic force of the spring (82), and the ohm shaft (5)
9). At this time, the link (85) rotates slightly counterclockwise around the support shaft (86), and the link (
87) rotates clockwise around a support shaft 89). As the link (87) rotates, the pins (91) and (92) are guided through the elongated holes (93 and 94), and the link (90) moves to the left against the elastic force of the spring (99). Then link (100) with the pin (96) that moves to the left.
is suppressed, link (100) is spring (102)
The brake shoe (108>(110) is rotated clockwise around the support shaft (103) against the elastic force of the brake shoe (108>(110))
07) (109). In addition, the link (121) that presses the brake shoe (<160) and presses the brake shoe (161) 'd#' = M from the side of the capstan motor (159) is the pink 9 that moves to the left.
7), it rotates clockwise around the support shaft (124), and is separated from the brake piece (160). However, the brake piece (160) is pink 97).
As a result, the brake shoe (161) is separated from the side surface of the capstan motor (159). Further, the brake piece (41) is released from being suppressed by the pin 123〉 and is pressed by the pin (122), and the brake shoe <45) is pressed against the take-up reel stand (40).
It rotates clockwise around the support shaft (44) by the elastic force of the spring (43) without coming into pressure contact with the side surface of the support shaft (44).

Also, the cam (285) of the link (90) moving to the left
The pin (115) slides, and the link (111) rotates clockwise around the support shaft (114>) against the elastic force of the spring (113). (117) and rotates counterclockwise around the idler (
119) is in a state separated from the rotating body (172). Furthermore, by rotating the link (116) counterclockwise,
Link (149) is pressed and spring (153)
It rotates clockwise around the support shaft (154) against the elastic force of the pin (150), and the elongated hole (156) is pressed against the pin (150).
The link (155) rotates counterclockwise around the support shaft (158). This expands the regulation range of the pin (175), that is, the rotation range of the rotation arm (174).

When the pin (216) moves in the cam groove (69), the sector gear (215) rotates clockwise about the support shaft (25). Due to the meshing of the sector gear (215) and the gear (221), the gears (221) and (223) rotate counterclockwise around the support shaft (222), and the link (220) is also pulled by the spring (225). (221) and (223) rotate counterclockwise around the support shaft (222>.The sliding body (17) slides in the loading groove (16) via the link (218), and the cylinder Base (1
) side. Even after that, the pin (224) is notched (21).
The gear (223) holds the spring (22) until it comes into contact with the spring (22).
The sliding body (1) rotates counterclockwise against the elastic force of the sliding body (1).
7) is crimped onto the cylinder base (1) side. At the same time, due to the meshing of gears (223) and (229), gear (22
9) rotates clockwise around the support shaft (231), and the link (228) is pulled by the spring (232) and rotates clockwise with the rotation of the gear (229). The sliding body (21) slides on the loading groove (20) via the link (226) and comes into contact with the cylinder base (1). Thereafter, the gear (229) continues to rotate clockwise against the elastic force of the spring (232) until the pin (230) comes into contact with the notch (227), moving the sliding body (21) toward the cylinder base (1). It is crimped. Also, when loading a tape before recording/playback mode, the pin (
80) moves in the cam groove (68), the brake shoe (45) comes into pressure contact with the side surface of the take-up reel stand (40), and from this the magnetic tape (280) is moved so that the loading post (14) < 18 > and tilted ball (15
) (19) causes the reel hub (281) to be pulled out from the rule and completely wrapped around the cylinder (3).

Furthermore, since the sliding body (21) has moved away from the tension arm (23), the tension arm (23) rotates counterclockwise about the support shaft (25) due to the elastic force of the spring (27). Here, the link (212) is pressed by the pin (24) provided on the tension arm (23) and rotates clockwise around the support shaft (214), and the pin (212) provided on the link (212) ) is cam (65)
It enters the notch (70) provided in the. When the tension arm (23) rotates to the position shown in Figure 8 and applies tension to the magnetic tape (280), the band brake (28) is wound around the side of the supply reel stand (30) and is pressed into contact with the band brake (28). The tension arm (23) and the sector gear (215) are both connected to the support shaft (25) as shown in Fig. 22.
Since it rotates independently around the center, the small space of the chassis (2) is effectively utilized.

When the pin (179) moves in the cam groove (67), the pin (
180) (181) are guided through the elongated holes (182) (183), and the link (178) moves to the left. Further, the pins (187) and (188) are guided through the elongated holes (189 and 190), and the link (184) also moves to the left. The link (192) is then meshed with the gears (186) and (193).
) rotates clockwise around the spindle (195), and the pinch roller arm (196) is connected to the links (202) (204).
It rotates counterclockwise around the support shaft (198) via the support shaft (198). From this, the pinch roller (199) is attached to the magnetic tape (28
0), the pinch roller arm (196) contacts the capstan (201') through the capstan (201'), and then the pinch roller arm (196) resists the elastic force of the spring (206), which is also compressed. The pinch roller (199) is pressed against the capstan (201).

At this time, the link (207) is pressed by the projecting piece (278), and the support shaft (210) resists the elastic force of the spring (209).
) rotates clockwise. Here the pivot (195)
Since the pins (194 and 197) are on a straight line, the pressing force of the pinch roller (199) is applied to the support shaft (195) via the pinch roller arm (196) and links (202 and 204). As a result, the pinch roller (199) properly applies aJ to the capstan (201) without applying any external force to the side surface of the cam groove (67).
is maintained in the same state. Further, the brake piece (31) is pressed by the cam (286), rotates counterclockwise around the support shaft (34) against the elastic force of the spring (33), and separates from the band brake (28). . Brake piece (35)
is fully pressed by the cam (185), rotates counterclockwise around the support shaft (38) against the elastic force of the spring (37), and the brake shoe (39) is pressed against the take-up reel stand (40). Move away from the sides.

Then, the protruding piece (238) is pushed out from the notch (70),
Immediately, with the leaf switch (237) turned on, the recording/playback mode is detected by the detector (239) from the number of times the light source (240) passes through the detection hole (71), and the system control (286) ) The loading motor (55) is stopped by a control signal from the motor. At this time, the magnetic tape (280) is attached to the tape guide bins (12) (13).
), impedance roller (5), full width erase head (4
), audio erasure head (7), audio control head (
8) and the pin (208).

When the loading motor (55) stops, the capstan motor (159) rotates clockwise at low speed according to the control signal from the system control (286), and the gear <1
73) rotates counterclockwise. Due to the rotational force, the rotating arm (174) rotates counterclockwise around the support shaft (171) until it meshes with the gear (54) while the gear idler (176) is stopped.
6) rotates clockwise around the support shaft (177). Here, when the rotating arm (174) rotates counterclockwise, the pin (175) comes into contact with the protrusion (153), so that the gear idler (176) and the gear (54) mesh appropriately. The gear (5) is rotated by the rotational force of the gear idler (176).
4) rotates counterclockwise around the support shaft (53), and the take-up reel stand (40) rotates clockwise at low speed due to the engagement of the gears (51X52). Therefore, pinch roller (199
) and the magnetic tape (280) held between the capstan (201).
2) It is wound up to the side and the recording/playback mode can be executed.

Note that the amount of winding of the magnetic tape (280) around the reel hubs (281) and (282) constantly changes as the magnetic tape (280) travels. The rotation speed is magnetic tape (28
0) will constantly change depending on the running. On the other hand, since the rotational speed of the capstan motor (159) is constant, the gear (51) is controlled by the gear idler (17B).
The rotational speed transmitted to (54) is constant. From this, as mentioned above, between the gears (51) and (54), and between the gears (46)
(50) Due to the friction generated between them, the take-up reel stand (40) and the supply reel stand (30) rotate at a rotational speed commensurate with the amount of winding of the magnetic tape (280) around the reel hubs (281) and (282), respectively. do.

Press the pause button (
(not shown), this condition is detected by the system control (286), and the control signal causes the cylinder (3) to continue rotating at high speed, and the capstan motor (159) to rotate clockwise at low speed. When the rotation is allowed to stop, the loading motor (55) rotates forward and the cam (65) rotates clockwise about the support shaft (72) to the temporary stop mode shown in FIGS. 8 to 9. The pins (80), (179), and (216) are respectively connected to the cam groove (68).
(67) and (69) are moved simultaneously.

When the pin (80) moves in the cam groove (68), the support shaft (7
2) and pins (76) (77) are long holes (75) (78)
(79) is completely guided, and the moving lever (74) moves downward. As shown in FIG. 19, the ohmic shaft (59) rotates counterclockwise, but the rotary lever (81) does not rotate and does not come into contact with the ohmic shaft (59). It moves only slightly from the state shown in the figure. At this time,
The link (85) rotates slightly clockwise around the support shaft (86), and the link (87) rotates counterclockwise around the support shaft (89). The rotation of the link (87) causes the pin (
91) and (92) are fully guided through the elongated holes (93) and (94), and the link (90) moves to the right due to the elastic force of the spring (99), but the link (100) engages with the pin (96). Since the brake shoes (108) and (110) do not rotate in this state, the brake shoes (108) and (110) are in a state separated from the side surfaces (107) and (109). Also, the pin (115) is a link (
90), but since the link (111) does not rotate, the link (116) also does not rotate, and the components in the transmission path are connected to the recording/reproducing mechanism described above. However, the brake shoe (16
'o) is released from the oppression by the pin (97) and rotates counterclockwise around the support shaft (164) by the elastic force of the spring (163), and the brake shoe (161) is connected to the capstan motor (159). The brake of the capstan motor (159) is securely held by pressing the capstan motor (159) against the side surface of the capstan motor (159). At the same time, the link (121) is pressed by the pin (97) and rotates slightly counterclockwise around the support shaft (124), which causes the brake piece (41) to be released from the oppression by the pin (97). The support shaft (4) is supported by the elastic force of the spring (43).
Rotate clockwise around the brake shoe (45).
) is brought into pressure contact with the side surface of the take-up reel stand (40) to hold the take-up reel stand (40) with the brake.

When the pins (216) (179) move in the cam grooves (69) (67), the cam grooves (69) (67) are concentric with the cam (65) in this range, so the sector gear (215)
and links (178) are inoperative and the components present in their transmission paths are not driven.

And with the leaf switch (237) turned on,
The temporary stop mode is detected by the detector (239) from the number of times the light from the light source (240) passes through the detection hole (71), and the loading motor (55) is stopped by a control signal from the system control (286). Therefore, the slow clockwise rotation of the capstan motor (159) is stopped, and the take-up reel stand (40) and the magnetic tape (280) held between the pinch roller (199) and the capstan (201) are Supply reel stand (30) (7
) The low-speed clockwise rotation stops and the machine enters pause mode.

When the pause button is turned on again from the pause mode shown in FIG. 9, the system control (286) detects the cancellation of the pause mode, and the control signal causes the loading motor (55) to rotate in the reverse direction. Cam (65)
rotates counterclockwise around the support shaft (72) from FIG. 9 to FIG. 8. and pins (80) (179) (216
) respectively move simultaneously in the cam grooves (68), (67), and (69), the components then operating in their transmission paths moving in a manner opposite to that of FIGS. 8 to 9. to do. Then, the capstan motor (159) rotates clockwise at low speed in response to a control signal from the system control (286), and the magnetic tape (280)
) side, and the recording/playback mode is then executed.

When the rewind button is turned on from the playback mode shown in FIG. ) rotates forward, and the cam (65) rotates clockwise about the support shaft (72) from FIG. 8 to the rewind play mode shown in FIG. 10. And the pins (80) (179) < 216) are each
The cam grooves (68), (67), and (69) are moved at the same time. To execute the rewind playback mode from the playback mode, it is necessary to go through the pause mode shown in FIG. 9, and from this, the pin (80) <179> (216) is A case will be described in which the cam grooves (68), (67), and (69) are moved up to.

When the pin (80> moves in the cam groove (68), the support shaft (7)
2) and pin (76>(77) are long holes (75) (78)
(79), the moving lever (74) moves to the first position. As shown in FIG. 20, the ohmic shaft (59) rotates counterclockwise, but the rotary lever (81) does not rotate and does not come into contact with the ohmic shaft (59). Move slightly from the state shown in the figure. At this time, the link (85) rotates slightly counterclockwise around the support shaft (86), and the link (87) rotates counterclockwise around the support shaft (89). The rotation of the link (87) causes the pin (9
1) (92) is guided through the elongated holes (93) and (94), and the link (9o) moves to the left against the elastic force of the spring (99), but the link (100) is not connected to the pin (96). Since the brake shoes (108) and (110) do not rotate while still being engaged with the links, the brake shoes (108) and (110) are separated from the side surfaces (107 and 109).
o), but the link (
Since the link (111) does not rotate, the link (116) also does not rotate, and the components present in the transmission path remain in the above-mentioned regeneration mode.

Furthermore, the link (121) does not rotate and the take-up reel stand (4o)
is a state in which the brake is held by the brake piece (41). However, the brake piece (160) is
7), the brake shoe (161) rotates clockwise about the support shaft (164) against the elastic force of the spring (163), and the brake shoe (161) separates from the side surface of the capstan motor (159).

When the pins (216) (179) move in the cam grooves (69) (67), the cam grooves (69) (67) are concentric with the cam (65) in this range, so the sector gear (215)
and links (178) are inoperative and the components present in their transmission paths are not driven.

Further, since the pin (213) is pushed out from the notch (70), the link (212) rotates counterclockwise about the support shaft (214) while being pressed by the pin (24).

From this, the tension arm (23) rotates clockwise around the support shaft (25), releasing the tension on the magnetic tape (280) and applying the band brake (28) to the side of the supply reel stand (30). Unwind.

And with the leaf switch (237) turned on,
The rewind playback mode is detected by the detector (239) from the number of times the light from the light source <240) passes through the detection hole (71), and the reloading motor (55) is detected by the control signal from the system control (286). stops.

When the loading motor (55) stops, a control signal from the system control (286) causes the capstan motor (159) to rotate counterclockwise at the speed for rewinding and playback, and the gear (173) rotates clockwise. do. The rotational force causes the rotating arm (174) to engage the gear idler (
176) rotates clockwise around the spindle (171) until it meshes with the gear (50), and then the gear idler (176) rotates counterclockwise around the spindle (177). do. Here, when the rotating arm (174) rotates clockwise, the pin (175) comes into contact with the protrusion (157), so the gear idler (176) and the gear (5
0) mesh properly. The gear (50) rotates clockwise around the support shaft 49) due to the rotational force of the gear idler (176), and the supply reel stand (30) rotates counterclockwise due to the engagement of the gears (46) < 47). .

Therefore, pinch roller (199) and capstan (20
The take-up reel stand (40) also rotates counterclockwise via the magnetic tape (280) held between the magnetic tape (280)
80) is wound onto the reel hub (281) while being given appropriate back tension by the brake piece (41), and the rewind play mode is executed.

In addition, when the fast forward button is turned on from the playback mode, the fast forward playback mode is activated by the capstan motor (1) in the playback mode.
It is only necessary to convert the slow clockwise rotation of 59) to the speed for fast-forward playback mode. .

When the stop button is turned on from the recording/playback mode shown in FIG. (159) rotates counterclockwise, and the loading motor (55)
rotates in the opposite direction, and the cam (65) rotates counterclockwise around the support shaft (72) from FIG. 8 to FIG. 6. And the bottle (
80) (179) (216) are respectively connected to the cam grooves (68) (
67) and (69) at the same time.

The bottles (80) (179) (216) are in the cam groove (68) (
67) and (69), a reverse operation is performed from the operation from FIG. 6 to FIG. 8 described above, but here, the links (149) and (155) are The position is the same as in the recording/playback mode, and the pivoting range of the pivoting arm (174) remains expanded. Further, the brake shoe (45) is in pressure contact with the side surface of the take-up reel stand (40). The rotational force of the gear (173), which rotates clockwise due to the counterclockwise rotation of the capstan motor (159), causes the rotating arm (174) to engage the gear (50) with the gear idler (176) stopped. Rotate the spindle (171) until it engages properly.
), and then rotates clockwise around the gear idler (1
76) rotates counterclockwise around the support shaft (177). From this, the supply reel stand (30) is rotated counterclockwise while the take-up reel stand (40) is stopped, and the magnetic tape (280) is wound onto the reel hub (281) side to perform tape unloading. ing. Then, as mentioned above, the stop mode is detected by the detector (239), and the loading motor (55) and capstan motor (15) are activated by the control signal from the system control <286').
9) stops and enters stop mode.

Next, in a mode other than the above-mentioned eject mode, if the power supply is interrupted due to a power outage, etc., the backup power supply operates, and the loading motor (55) rotates in forward and reverse directions according to the control signal from the system control (286). It turns out. From this bottle (80) (179
) (216) simultaneously move through the cam grooves (68), (67), and (69), and the components present in their transmission paths operate as described above. As shown in Figure 2, when the system control (286) detects that the leaf switch (237) is turned on at the end of the notch (70), the loading motor (55) is stopped by the control signal. , it enters a state of waiting for the power supply to be restored. In this state, the magnetic tape (280') is inserted into the tape cassette (243').
) and will not damage the magnetic tape (280). Further, when the power supply is restored from the above-described standby state, the loading motor (159) rotates in the opposite direction, and the cam (65) rotates counterclockwise about the support shaft (72). From this, as shown in Figure 1, the protruding piece (238) has a notch (7
0) and the leaf switch (237) is off, the detector (239) detects the stop mode from the number of times the light source (240) passes through the detection hole (71), and the system control (286) ) The loading motor (55) is stopped by a control signal from. Then, by turning on a predetermined operation button, a predetermined mode is executed.

(g) Effects of the Invention According to the mode detection device of the present invention, each mode can be detected by using the position where the switch means engages with the periphery of the moving means and the boundary of the stepped portion as a reference. The detected parts provided in both may be the same, which simplifies the structure of the present invention and reduces costs.The control part also has a simple structure, and since the detection means and the detected part are non-contact, it can be used for a long time. Benefits such as longer service life can be obtained.

[Brief explanation of the drawing]

1 and 2 are plan views showing the mode detection device of the present invention, FIG. 3 is a side view of the main parts of FIGS. 1 and 2, and FIG.
Figures 5, 6, 7, 8, 9, and 10
11 is a plan view of a magnetic recording/reproducing apparatus using the mode detecting device of the present invention as seen through the chassis; FIG. FIG. 12 is a plan view of FIG. 11 seen from the back, FIG. 13 is a side view showing a magnetic recording/reproducing apparatus using the mode detection device of the present invention, FIGS. 14, 15, and 16.
17, 18, 19, and 20 are side views showing the relationship between the rotary lever and the ohm shaft in a magnetic recording/reproducing device using the mode detection device of the present invention.
FIG. 1 is a plan view showing a tape loading mechanism provided in a magnetic recording/reproducing device using the mode detection device of the present invention;
FIG. 22 is a sectional view showing the coupled state of the tension arm and sector gear provided in a magnetic recording/reproducing device using the mode detection device of the present invention, and FIGS. 23 and 24 are FIG. 25 is a bottom view showing a state in which multi-pole stones are coupled to the reel stand and the bottom surface of the pinch roller of a magnetic recording and reproducing device that has been used in a magnetic recording and reproducing device that uses the mode detection device of the present invention for front cassette loading. FIG. 26 is a side view showing a state in which the magnetic recording/reproducing device using the mode detection device of the present invention is used for top cassette loading, and FIG. 27 is a main part showing the inside of the tape cassette. FIG. Explanation of main drawing numbers (65)...Cam, (70)...Notch, (71)
)...Detection hole, (74)...Movement lever, (17
8)...link, (215)...sector gear, (2
37)...Leaf switch, (238)...Protrusion piece,
(239)...Detector, (240)...Light source,
(286)...System control. Applicant Sanyo Electric Co., Ltd. and one other representative Patent attorney Shizuo Sano Figure 21 Figure 22 Figure 23 Figure 24 Figure 27
Drawing Procedure Amendment (Method) July 27, 1985 Patent Application No. 157319 2, Name of Invention Mode Detection Device 6, Relationship with the Person Who Makes the Amendment Case Patent Applicant Name (188 ) 1 person outside Sanyo Electric Co., Ltd. 4, representative
Address: 2-18 Keihan Hondori, Moriguchi City Contact: Telephone (Tokyo) 835-11114! Contents of amendments by Nakagawa 7, who is stationed at Inter. Figures 8, 9, and 10 are corrected as shown in the attached sheet. that's all

Claims (1)

[Claims] (1) A magnetic recording/reproducing device, which has a stepped portion on its periphery and a moving means having a plurality of detected portions for detecting each mode, and an engaging portion that engages with the periphery and the stepped portion; The number of parts to be detected is counted without contacting the part to be detected, using a switch means that operates according to the engagement state and the engagement position of the engaging part with respect to the boundary between the peripheral edge and the stepped part as a reference. 1. A mode detecting device comprising: a detecting means for detecting each mode, and a control section to which the output of the detecting means is input, drives a mechanical section connected to the moving means according to each mode.