JPH02301057A - magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify structure and to attain the miniaturization of a device by turning an arm with a tape guide and a tape draw-out member. CONSTITUTION:The tape draw-out member 9 is interlocked with a link 131 by turning the arm 130, and is moved along a guide groove 7. In the middle way, the member is pushed up with a rod 127 and the arm 130, and elastic parts 132 and 133 are deflected, and the draw-out members 9 and 10 generate pressing forces for a holder 155. Also, a pin 138 is abutted with the side plane of a lever 135 in the middle way that a cam gear 119 is rotated in a clockwise direction, which rotates the levers 135 and 136a in the clockwise direction. Thereby, a pinch arm 14a is turned in the clockwise direction with an abutting part 136b, and the tape guide 17 studded on the arm 14a is attached on a magnetic tape 5, then, a pinch roller 13 is abutted with a capstan 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and particularly to a moving mechanism of a tape guide thereof.

[Prior art] Figures 13 to 16 are shown in Japanese Patent Application Laid-open No. 61-248258, for example.
FIG. 13 is a plan view of the main parts mainly showing the parts attached to the top surface of the chassis, and FIG. 14 is a plan view of the main parts mainly showing the parts attached to the bottom surface of the chassis. Figure 15 is a plan view of the main parts showing the parts shown in Figure 13.
FIG. 16 is a side view of the vicinity of the main cam shown in the figure, and FIG. 16 is a sectional view of each transmission gear portion of FIG.

In the figure, (1) is the chassis, (2) is the chassis (1
), (3a) is a capstan supported on the chassis (1), (3b) is a capstan (3a)
), (4) is a tape cassette that engages with the reel (2) and is mounted on the chassis (1), (5) is a magnetic tape wound around the tape cassette (4), ( 6) is a rotary head assembly (7) provided in the chassis (1) and including a magnetic head.

(8) is a guide groove formed in the chassis (1); (9);
(10) is a tape pull-out member inserted into each of the guide grooves (7) and (8), (11) is a tension pin provided on the chassis (1), and (12a) is a tension pin (11).
) is implanted and rotatably supported on the chassis (1), (12b) is a tension arm (12b).
2a) and a tension spring whose ends are engaged with the chassis (1), (13) a pinch roller provided on the chassis (1), and (14a) a tension spring that allows the pinch roller (13) to rotate freely. Planted pinch arms, (15), (16),
(17) are tape guides provided on the chassis (1), (18) and (19) are gears rotatably supported under the chassis (1), and (20) and (21) are gears. (
18), an arm engaged with (19), (22),
(23) is rotatably attached to the arms (20) and (21) at one end, and the tape drawer member (9) is attached at the other end to the arm (20), (21).
), (10) is rotatably attached to the link, (24
) is the lower reciprocating member provided under the chassis (1), (
25) and (26) are slits formed in the lower reciprocating member (24), and (27) and (28) are slits (2), respectively.
The pin (29A) inserted through the pins (29A) and (26) and implanted in the chassis (1) engages with the gears (18) and (19) and is connected to the pin (27) as well as the lower reciprocating member (24). ),
(28) A pressing member having a slit inserted through the (29)
B) is a pressing spring engaged with the lower reciprocating member (24) and the pressing member (29A), and (30) is the lower reciprocating member (24).
The guide groove (31) is formed in a part of the chassis (1).
The main cam is rotatably supported under (32) the cam groove formed on the back side of the main cam (31), (33)
(34) is the pin engaged with the cam groove (32), and (34) is the pin engaged with the cam groove (32).
3) is implanted and rotatably supported under the chassis (1), (35) is a pin implanted in the arm arm (34), (37) and (38) are main cams (31 cam grooves (39) and (40) formed on the surfaces of the pins (41) engaged with the cam grooves (37) and (38), respectively.
), (42) are arms with pins (39) and (40) implanted therein, (43) is a pressing spring that has one end engaged with the pin (39) and the other end with the pinch arm (14), ( 44
) is an upper reciprocating member provided on the chassis (1), (
45) is a guide groove formed in a part of the upper reciprocating member (44), and (46) is engaged with the guide groove (45) and is connected to the arm (4).
2), the pin (47) is the upper reciprocating member (44)
), (48) is a slit formed in a part of (
The pin (49a) is inserted into the tape guide (15) and is rotatably attached to the chassis (1).
b) is a positioning pin implanted in the chassis (1), (4
9C) is a convex portion formed on a part of the arm (49a), (
50a) has the chassis (1) coaxially with the arm (49a).
The preload arm (50b) is rotatably attached to the preload arm (50b), and the pin (51) is implanted in a part of the preload arm (50a).
) is a torsion spring that has one end locked to a convex part (49c) and the other end to a pin (50b), (52) an engaging part that engages with the pin (sob), and (53) a flywheel (3b). (54) is a transmission gear that meshes with the gear (53) and the large gear part (54a) and is supported on the lower surface of the chassis (1); (55) is a transmission gear (54) formed on the outer periphery of the transmission gear (54); Similarly, the large gear part (5) is supported on the lower surface of the chassis (1).
5a> is a transmission gear that meshes with the small gear part (54b) of the transmission gear (54), and (36) is supported on the lower surface of the chassis (1) and is connected to the outer peripheral gear (31a) of the main cam (31) and the small gear part ( transmission gear meshed by (36a), (56);
is a solenoid fixed to the bottom surface of the chassis (1), (5
7) is a plunger slidably supported on the solenoid (56), (58) is an engagement pin implanted in the plunger (57), and (59) is a pin (59) on the chassis (1).
a) is rotatably supported and has a pin (58) on one end side.
), (60) is a slit formed on the other end side of lever (59), (61) is a clutch plate rotatably supported by a pin (61a) on the lower surface of chassis (1). , (62) is a pin implanted in a part of the clutch plate (61) and engaged with the slit (60), (63) is the slit portion formed in the clutch plate (61), and (64) is the chassis ( 1), which is rotatably supported on the lower surface of the transmission gear (55) and meshes with the small gear (55b) and large gear (64a) of the transmission gear (55).

In addition, in Fig. 16, (65) is the slit part (63).
and the clutch gear (64) and the chassis (1).
(66) is a compression spring arranged coaxially with the shaft (65), (67) is a clutch plate (
Surface A formed on the clutch plate (61), (68) is formed on the clutch plate (61).
) formed on the surface B, (69) is A (67) and 100 B
(68) is the slant part that connects with (68).

Next, the operation will be explained. The state shown by the two-dot chain line in FIGS. 13 and 14 shows the state in which the magnetic tape (5) in the tape cassette (4) is in the first position where it can be pulled out, that is, the state before loading.

The state shown by solid lines in FIGS. 13 and 14 is a second state in which the magnetic tape (5) is pulled out of the tape cassette (4) and attached to the magnetic head of the rotary head assembly (6).
It is a figure which shows the position, ie, the state in which loading is completed.

When loading is started in FIG. 14, the flywheel (3b) rotates counterclockwise. At the same time, the solenoid (56) is energized, the plunger (57) is attracted in the direction of the arrow (1000), the lever (59) rotates clockwise, and the clutch plate (61) rotates counterclockwise. At this time, the clutch gear (
64) comes into contact with the slant part (69) from the surface A (67), and resists the biasing force of the compression spring (66).
ride on. Then, the small gear part (64b) of the clutch gear (64) becomes the large gear part (36b) of the transmission gear (36).
), and the rotational driving force of the flywheel (3b) is transmitted through the transmission gear (54), the transmission gear (55), and the clutch gear (
64), is transmitted to the main cam (31) via the transmission gear (36), and rotates the main cam (31) in the direction of the arrow (1001).

Following this movement, the arm (34) moves with the arrow (1002
), and the lower reciprocating member (24) moves in the direction of the arrow (10
03). Then, the pressing member (29
The arms (20) and the gears (18) and (19) engage with the racks (29a) and (29b) formed in
(21) rotate in the directions of arrows (1004) and (1005), respectively, and the tape pull-out members (9) and (10) pull out the magnetic tape (5) from the tape cassette (4). ) attached to the magnetic head of the second
, i.e., the loading position, respectively, the guide grooves (7);
Move through (8).

Also, at the same time as the above operations, the operations of each member installed on the chassis (1) are as shown in Fig. 13, with the main cam (
31) rotates in the direction of the arrow (1001), the cam groove (
The pin (40) slides along the arm (42)
rotates in the direction of the arrow (100G), and the upper reciprocating member (4
4) moves in the direction of the arrow (1007). Then, the pin (50b) is pushed by the engaging part (52) and the preload arm (50a) and the torsion spring (51) rotate counterclockwise, so that the convex part (49c) and the torsion spring (51) The arm (49a) rotates counterclockwise due to contact with the
Part of the arm (49a) in the middle is the positioning pin (49b)
Although the preload arm (5) is prevented from rotating, the preload arm (5
0a) rotates, a preload is applied to the positioning pin (49b) of the arm (49a) by the biasing force of the torsion spring (51).

At the same time, when the pinch arm (14a) rotates in the direction of the arrow (1008) while contacting the tape guide (17) which rotates due to the driving force of another drive gear (not shown), the pinch arm (14a) rotates along the cam groove (37). As the pin (39) slides and the arm (41) rotates in the direction of the arrow (1008), the pin (39) resists the urging force of the pressing spring (43) and the pinch arm (14a) A pinch roller (13) attached to the capstan (3a) generates pressure against the capstan (3a). When the loading operation is completed in this way, the power supply to the solenoid (56) is cut off, the plunger (57) slides to the opposite side of the arrow (1000), and the lever (59) rotates counterclockwise. , the clutch plate (61) rotates clockwise, the clutch gear (64) is pushed back from the 8th plane (68) to the A plane (67) by the compression spring (66), and the small gear part ( 6
4b) is removed from the large gear part (36b) of the transmission gear (3G), so the rotational driving force of the flywheel (3b) is no longer transmitted to the main cam (31) and is simply transferred to the capstan (
3a) is rotated, and the magnetic tape (5) is transferred by the pressing force with the pinch roller (13).

In addition, when releasing the attachment between the magnetic head of the rotating head assembly (6) and the magnetic tape (5), the solenoid (5)
6) is energized and the clutch gear (64) is connected to the transmission gear (
36) and rotate the flywheel (3b) in the opposite direction to the loading time, that is, clockwise, the rotational driving force of the flywheel (3b) is transferred to the main cam (31).
is rotated to the opposite side of the arrow (1001), and following this movement, each lever, arm, and reciprocating member rotate or move in the opposite direction to each arrow, and the loading shown by the two-dot chain line is performed. Return to the previous position, ie the first position from which the magnetic tape can be pulled out.

[Problems to be Solved by the Invention] Since the conventional magnetic recording/reproducing device is configured as described above, the mechanism for moving the tape pull-out member (9) and the mechanism for moving the tape guide (15) are driven by power. Since it is separate and independent from the main cam (31) of the transmission path, it requires a large number of component parts, making the device complex and making it impossible to downsize it.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a magnetic recording/reproducing device that has a simple structure and can be miniaturized.

[Means for Solving the Problems] A magnetic recording and reproducing device according to the present invention has a rotatable link attached to an arm in which a tape guide is installed, and a tape pull-out member rotatably attached to this link. be.

[Function] In this invention, the tape guide and the tape pull-out member simultaneously suspend and move the magnetic tape from within the tape cassette by rotating one arm,
Form a predetermined tape pass.

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS. 1 to 11. Figure 1 is a plan view of the main parts that mainly shows the parts attached to the top surface of the chassis when loading is completed; The figure is a plan view of main parts showing mainly the parts attached to the top surface of the chassis before loading, Figure 4 is a plan view of main parts of Fig. 3 is a longitudinal sectional side view of the vicinity of the reel stand, FIG. 6 is a longitudinal sectional side view of the vicinity of the rotary head assembly of FIG. The figure is a cross-sectional view of the main part showing the photoelectric switch of Fig. 1, and Fig. 9 is a schematic diagram showing the cam groove of the first cam gear.
FIG. 10 is a plan view showing a fast-forward seven-rewind state, and FIG. 11 is a cross-sectional view of the main parts showing the cam groove and tape pull-out member in FIG. The explanation will be omitted.

In the figure, (2A) is a reel stand provided in the device, and the reel hook part (2A) engages with the hub inside the magnetic tape.
a), a stem part (2b), a reel rest part (2C), a reel coil (103), and a shaft part (2d),
Moreover, the shaft portion (2d) is attached to the metal substrate (101). (100) is a column fixed to the chassis (1), (101) is a metal printed circuit wiring board (hereinafter abbreviated as metal board) attached to the chassis (1) via the column (100), and (102) is a metal Capstan coils (103) are bonded to the substrate (101) and arranged radially around the capstan (3a); (103) is the metal substrate (101);
The reel coil (104) is attached to the metal substrate (101) and is arranged radially around the reel stand (2A).
The reel brake (105) is a transmission gear rotatably attached to the lower surface of the chassis (1) by a shaft (105a), and the small gear part (105a) is connected to the large gear part (55) of the transmission gear (55). 55a).

(106) is the shaft (106a) together with the transmission gear (105).
The arm (107) is rotatably attached to the chassis (1) by a shaft (106) attached to a part of the arm (10B).
a clutch gear rotatably mounted by b);
The small gear part (107a) meshes with the large gear part (105b) of the transmission gear (105). (108) is a first permanent magnet fixed to a part of the arm (106);
9) is a clutch coil (11) arranged almost directly below the permanent magnet (10B) and bonded to the metal substrate (101).
0) is a pin implanted in the arm (10B), (111)
is a tension spring whose one end is engaged with a pin (110) and the other end is engaged with a part of the chassis (1), (112) is a holder attached to the bottom surface of the chassis (1), and (113) is a holder (112). The second permanent magnet (114) is a contact portion formed by bending a part of the arm (10B), (
115), (116) are the bearings fixed to the bottom surface of the chassis (1), (117) are the holders attached to the top surface of the chassis (1), and (11B) are the holders (117
), the transmission gear (119) is rotatably supported by the shaft and meshed with the small gear part (36a) of the transmission gear (36), and the transmission gear (119) is rotated by the chassis (1) with a part of the reel stand (2A) inserted therein. The first cam gear (120) is freely supported and meshed with the transmission gear (118), and the first cam gear (120) is rotatably supported on the chassis (1) with a part of the reel stand (28) inserted through it. The second cam gears (121) and (122) that mesh with the cam gear (119) each mesh with the first cam gear (1
19) , cam grooves formed in the second cam gear (120), (123) and (124) cam grooves formed in the chassis (1), (125) cam grooves (121),
(123) is the roller inserted in it, (12B) is the cam groove (
122), a roller inserted through (124), (127)
) is a rod that rotatably supports a roller (125) at one end, (128) is a rod that rotatably supports a roller (126) at one end, and (129) is a rod (127) that rotatably supports a roller (126) at one end.
A link (130) is fixed to the chassis (
1) and is rotatably supported by a tape guide (1).
(131) has one end attached to the arm (
130), and the other end is rotatably supported by the tape pull-out member (130).
9) A link rotatably supported by a part of the (132)
, (133) are links (129) and (131), respectively.
(134) is a shaft inserted into the bearing part (115), (135) and (136a) are levers rotatably attached to the shaft (134), and (136b) is a lever. (137) is a contact part formed by bending a part of (136a), and one end of (137) is a lever (
135) is a torsion spring whose other end is engaged with the lever (136a); (138) and (139) are pins implanted in the first cam gear (119) and the second cam gear (120), respectively; 140) is the shaft (144) on the chassis (1)
(141) is a contact portion provided on a portion of the lever (140); (142) is an engagement portion provided on a portion of the lever (140); (143) is a lever rotatably supported by
) has one end part of the lever (140) and the other end part of the chassis (
1), a tension spring (145) is a holder attached to the chassis (1), (14B), (
147) and (148) are photoelectric switches provided on the holder (145), and (149) and (150) are the first cam gear (119) and the second cam gear (120), respectively.
) detection holes formed in (151), (152),
(153) and (154) are pins implanted in the chassis (1), and (155) is the rotating head assembly (6).
holder for attaching the to the chassis (1), (15
B) is an escape hole formed in the chassis (1), (157)
is the pin implanted in the tension arm (12), (15
8) is a contact portion formed on a part of the second cam gear (120), and (159) and (IGo) are respectively the chassis (1).
Reflective sheet attached to (161) is chassis (1)
This is an escape hole formed in the hole through which the transmission gear (118) is inserted.

Next, the operation will be explained. Figures 3 and 4 show the tape pull-out members (9), (10) and the tension pin (
11), pinch roller (13) and tape cassette (4)
FIG. 4 is a diagram showing a state in a first position where the device can be pulled out from the device, that is, a state before loading. Figures 1 and 2 show the state in the second position where the magnetic tape (5) is pulled out of the tape cassette (4) and attached to the magnetic head of the rotary head assembly (6), that is, the state in which loading is completed. FIG. When loading starts in Figure 4,
A current flows through a conductive pattern that is printed and wired on a metal substrate (101) (not shown) and soldered to a clutch coil (109). Then, the first permanent magnet (1
0B), according to Fleming's left-hand rule, a thrust acts in a direction perpendicular to the magnetic flux toward the current flowing through the coil, so the arm (106) is connected to the second permanent magnet (113) and the contact part (
It rotates counterclockwise against the adsorption force of the tension spring (114) and by the urging force of the tension spring (111), and a part thereof comes into contact with the bearing part (115) and stops. Then, the clutch gear (107) meshes with the gear (53) formed on the outer periphery of the flywheel (3b), resulting in the state shown in FIG. 2.

At this time, the flywheel (3b) rotates clockwise due to the action of the permanent magnet fixed inside and the current flowing through the capstan coil (102), so this rotational driving force of the flywheel (3b) is transferred to the clutch gear. (107)
, transmission gear (105), (55), (3B), (
118) to the cam gear (119), and in FIG. 3, the first cam gear (119) rotates clockwise. The second cam gear (119) meshes with this first cam gear (119).
The cam gear (120) receives rotational driving force from the first cam gear (119) and rotates counterclockwise. Then, the roller (125) and the roller (12B) are moved clockwise and counterclockwise by the cam grooves (121) and (122), respectively, and then the cam grooves (123) and (
The rod (127) moves along the shape of the rod (124).
) and (128) respectively move the tape pull-out member (10) and the arm (130) to the positions shown in FIG. Further, the tape drawing member (9) is moved in conjunction with the link (131) by the rotation of the arm (130), and moves along the guide groove (7) to the position shown in FIG. 1.

The intermediate tape pull-out members (9) and (10) are attached to the holder (1).
55), but still each rod (127)
), the elastic parts (132) and (133) are bent and the tape pull-out member (9) is pushed upward by the arm (130).

(10) each generate a pressing force against the holder (155). Further, while the first cam gear (119) rotates clockwise, the pin (13B) comes into contact with the side surface of the lever (135), causing the lever (135) and the lever (136a) to rotate clockwise. Then, the contact part (136b
), the pinch arm (14a) rotates clockwise, and the tape guide (14a) installed on the pinch arm (14a)
17) is attached to the magnetic tape (5), and the pinch roller (1
3) comes into contact with the capstan (3). Since the first cam gear (119) still rotates clockwise, the lever (1
35) rotates clockwise, the torsion spring (137) is deflected, and the pinch roller (13) pinches the magnetic tape (5) and applies pressure to the capstan (3a). Also, when the pin (139) comes into contact with the contact part (141), the lever (
140) rotates clockwise against the biasing force of the tension spring (143), and the pin (157) is released from the engagement portion (142), so that the tension arm (12)
The tension pin (12b) is rotated by the biasing force of the tension pin (12b).
1) applies tension to the magnetic tape (5). Then, when the first cam gear (119) rotates and the detection hole (149) comes directly below the photoelectric switch (146), the light emitted from the light emitting element will be 1 cam gear (1
19), it is reflected by the reflective sheet (159) through the detection hole (149) and enters the light receiving element, and the photoelectric switch (14B) is turned on.
Detects when loading is complete. Then,
When a current flows in the opposite direction to the clutch coil (109), the arm (106) rotates clockwise, and the abutment part (114) resists the biasing force of the tension spring (111) and rotates in the second direction. It is attracted to the permanent magnet (113). Then, the clutch gear (107) and the gear (53) are disengaged, so the rotational driving force to the first cam gear (119) and the second cam gear (120) disappears, and the flywheel (3b) Rotate in any direction and press the capstan (3
The magnetic tape (5) sandwiched between a) and the pinch roller (13) is transferred.

At this time, the first cam gear (119) is connected to the torsion spring (1
The pin (138) is pressed by the reaction force of
119) and the second cam gear (120) are prevented from rotating. The pin (39) to which the reaction force is transmitted by the tension spring (143) simultaneously moves the force that attempts to rotate the second cam gear (120) clockwise, but the latter is weaker.

Next, the relationship between the cam groove (121) and the cam groove (123) and between the cam groove (122) and the cam groove (124) will be explained in detail.

The cam groove (121) has a portion A (121a) formed almost radially from the rotation center of the first cam gear (119) and the first cam groove (121).
It consists of eight parts (121b) formed concentrically with the rotation center of the cam gear (119), and a cam groove (123).
0 part (123a) formed concentrically with the rotation center of the first cam gear (119) and the first cam gear (119)
The slant portion (123b) gradually moves away from the center of rotation of the first cam gear (119) as the rotation angle of the first cam gear (119) progresses in the clockwise direction. If the concentric interiors of these two cam grooves (121) and (123) are developed in a straight line (considering the radius of the first cam gear (119) as infinite), it will become as shown in Figure 9, and the Until the No. 1 cam gear (119) rotates approximately 120 degrees, the roller (125) is restricted from moving in the circumferential direction by the A portion (121a) and from radial movement by the No. 0 portion (123a). be transported. First cam gear (1
When the roller (19) rotates approximately 120 degrees, the roller (125) is guided outward with respect to the center of rotation of the first cam gear (119), but on the way, the roller (125) is guided by the tape pull-out member (10) and the link (1
29) and the rotation center of the first cam gear (119).
An imaginary line (1010) connecting the center of rotation of the roller (125)
) turns to the right, so the roller (125) moves around the elastic part (
Even if it receives the reaction force of 132), it does not slide to the left side of the slant part (123t), but rather stops at the rightmost end of the slant part (123b). In this state (the state in which the cam groove (121) is in the position indicated by the solid line), the roller (125) does not apply force to the cam groove (121) in the direction of rotating the first cam gear (119). The pinch arm (14a) is in the middle of loading, and the guide roller (17) has a magnetic tape (5) on it, as shown in Figure 10.
However, the magnetic tape (5) is not in contact with the pinch roller (13), and the reaction force applied to the pin (13B) by the tension spring (14b) is almost equal to that of the first cam gear (119). Since it faces in the direction that coincides with the rotation center, it does not reach the force that rotates the first cam gear (119). However, at this point, the detection hole (150) is placed directly below the photoelectric switch (147), and the photoelectric switch (
147) is turned ON, the current to the clutch coil (109) flows in the opposite direction, the clutch gear (107) separates from the flywheel (3b), and the first cam gear (119
) and the second cam gear (120) stop rotating, and a mode is entered in which the magnetic tape (5) is fast-forwarded and 7-rewinded.

In this state, the tension arm (12) is attached to the pin (1
39) is not in contact with the abutting portion (141), the pin (159) is pressed against the engaging portion (142) against the biasing force of the tension spring (12b), and the magnetic tape (5) To perform high-speed transfer without contacting a tension pin (11). When transitioning from the fast forward 7 rewind mode to the recording/playback mode, the 8th part (121b) of the cam groove (121) passes the outer periphery of the roller (125).
), no external force is applied, and the positions of the rod (127) and tape pull-out member (10) do not change. Also, the cam groove (12
The relationship between 2> and the cam groove (124) is that of the reel stand (2A).
It is almost symmetrical with respect to a line that is perpendicular to the line that connects the comrades.

Furthermore, the arm (130) and the rod (
128) and the rotation center of the roller (126), the imaginary line (1012) in episode 7 is on the left side, so the second
The direction in which the cam gear <120) is driven (counterclockwise)
Do not apply force in the opposite direction.

Next, when releasing the attachment between the magnetic head of the rotating head assembly (6) and the magnetic tape (5), a current is applied to the clutch coil (109) and the clutch gear (107) is released.
meshes with the gear (53) and rotates the flywheel (3b) in the opposite direction to the loading time, that is, counterclockwise, this rotational driving force is transferred to the transmission gears (105), (55) of the clutch gear (107). , (3B), (11B)
is transmitted to rotate the first cam gear (119) counterclockwise, and the second cam gear (120) rotates the first cam gear (
119), it rotates clockwise. Eight sections (12
1b), the photoelectric switch (148) is turned on, detects that unloading is completed, and releases the engagement between the clutch gear (107) and the gear (53).

In the above embodiment, the elastic part (133) is formed in a part of the link (131), but as shown in FIG. 12, the elastic part (133) is formed in a part of the rod (128). Alternatively, although not shown, elastic portions may be formed on both the link (131) and the rod (128) in FIG. 12.

Furthermore, in the above embodiment, the structure of the tape guide (15) and tape pull-out member (9) on the supply side (left side in FIG. 1) of the magnetic tape (5) with respect to the rotary head assembly (6) was shown. , the tape guide (17) on the winding side (right side in Figure 1) of the magnetic tape (5) and the tape pull-out member (10)
The present invention may also be applied to the configuration described above, and the same effects as those of the above embodiments can be obtained.

[Effects of the Invention] As described above, according to the present invention, the link to which the tape pull-out member is attached is rotatably attached directly to the arm in which the tape guide is installed, so that the tape guide and the tape pull-out member can be moved. The drive mechanism can now be shared,
The number of parts is reduced, resulting in a simpler structure, resulting in an effect of miniaturization.

[Brief explanation of the drawing]

Fig. 1 is a plan view of main parts showing an embodiment of the present invention, mainly parts attached to the top surface of the chassis when loading is completed, and Fig. 2 shows parts mainly attached to the bottom surface of the chassis in Fig. 1. Figure 3 is a plan view of the main parts shown in Figure 3, mainly showing the parts attached to the top surface of the chassis, and Figure 4 is the main part shown in Figure 3, mainly showing the parts attached to the bottom of the chassis. 5 is a vertical sectional side view of the vicinity of the reel stand shown in FIG. 3; FIG. 6 is a vertical sectional side view of the rotary head assembly shown in FIG. 1; and FIG. 8 is a sectional view of the main part showing the operation of the photoelectric switch shown in FIG. 1, FIG. 9 is a schematic diagram showing the structure of the cam groove of the first cam gear, and FIG. FIG. 11 is a sectional view of the main part showing the cam groove and tape pull-out member of FIG. 1, FIG. 12 is a plan view of another embodiment of the present invention, and FIG. 13 is a conventional device. Fig. 14 is a plan view of the main parts mainly showing the parts attached to the bottom of the chassis, and Fig. 15 is a plan view of the main cam of Fig. 13. FIG. 16 is a side view of the vicinity taken longitudinally, and a sectional view of each transmission gear portion of FIG. 14. In the figure, (1) is the chassis, (4) is the tape cassette, (5) is the magnetic tape, (8) is the guide groove, (9) is the magnetic tape, (8) is the guide groove, and (9) is the magnetic tape.
), (10) are tape pull-out members, (15), (16
), (17) is the tape guide, (130) is the arm,
(130a) indicates a pin, and (131) indicates a link. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] (1) In a magnetic recording and reproducing device in which a magnetic tape is pulled out from a tape cassette and set to a predetermined path by a tape running member including a tape pull-out member that runs along a guide groove in a chassis, a tape guide is installed in the chassis. comprising an arm rotatably attached, and a link rotatably attached to a pin implanted in a part of the arm,
A magnetic recording and reproducing device characterized in that the tape pull-out member is attached to the link.