JPH075562Y2 - Tape recording / reproducing mechanism of magnetic recording / reproducing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tape loading mechanism of a magnetic recording / reproducing apparatus.

[Conventional technology]

What is shown in FIGS. 5 and 6 is, for example, Japanese Patent Laid-Open No. 61-187.
FIG. 16 is a plan view showing a tape loading mechanism of a conventional magnetic recording / reproducing apparatus shown in Japanese Patent No. 155.

In the figure, reference numeral (1) is a chassis, (2) and (3) are guide grooves formed in the chassis (1), and (4).
(5) is a tape pulling member slidably supported in the guide grooves (2) and (3), and (14) and (15) are second positions for pulling out the magnetic tape from the cassette and abutting it on the magnetic head. Stoppers for positioning the tape pull-out members (4) and (5), and (6) and (7) are pivotally supported by shafts (12) and (13) provided upright on the chassis (1). ) (5), a tape pull-out arm that is rotatably pin-coupled to each other,
Gears pivotally supported by 3), (19) (20) are springs stretched between the tape withdrawing arms (6) (7) and gears (10a) (11), and (10b) is the above. A reversing gear (16) meshing with the gear (10a) is a driving member (17) (18) guided by guide grooves (1a) (1b) formed on the chassis (1). ) Is a rack fixed to the drive member (16), and the racks (17) and (18) mesh with the reversing gear (10b) and the gear (11).
(27) is a pulley to which a driving force from a motor (not shown) is input, and (21) to (26) decelerate the driving force input to the pulley (27) and the gear (10a). It is a reduction gear that is transmitted to.

Next, the operation of this conventional device will be described.

FIG. 5 is a plan view showing a state where the tape pull-out members (4) and (5) are in the first position in the cassette, that is, a state before loading, and when loading is started, a motor (not shown) Therefore, the pulley (27) is driven, and this driving force is transmitted through the reduction gears (21) to (26) to the gear (10
The tape pull-out arm (6) is rotated counterclockwise via the shaft (12).

By the rotation of the tape pull-out arm (6), the tape pull-out member (4) pin-engaged with the long groove formed at the end of the tape pull-out arm (6) moves from the first position toward the second position in the guide groove (2).
Move along.

At the same time, the gear (10a) moves the drive member (16) in the direction of arrow A through the reversing gear (10b) and the rack (17),
Further, the tape pull-out arm (7) is rotated clockwise through the rack (18) and the gear (11), and is pin-engaged with the long groove formed at the end of the tape pull-out arm (7). The tape pull-out member (5) present is moved from the first position toward the second position along the guide groove (3).

The tape pull-out members (4) (5) are stoppers (14) (1
After reaching 5), the motor continues to rotate and the gear (10a)
(11) rotates counterclockwise and clockwise respectively, and installs springs (19) (20) stretched between the gears (10a) (11) and the tape pull-out arms (6) (7). Bend the tape pull-out members (4) and (5) to the stopper (14), respectively.
Press and fix to (15).

FIG. 6 shows the above-mentioned state in which loading is completed.

Next, the unloading operation will be described.

At the time of unloading, the operation is the reverse of the above description.
That is, the motor rotates in the reverse direction and the reduction gears (21) to (26)
After that, the gear (10a) and the tape pull-out arm (6) are rotated clockwise to move the tape pull-out member (4) from the second position to the first position along the guide groove (2).

At the same time, the gear (10a) is the reversing gear (10b), the rack (17)
Drive member (16) in the direction of arrow B through the rack (18) and gear (11) to move the tape pull-out member (5) from the second position to the first position along the guide groove (3). And move it to return to the state shown in FIG.

[Problems to be solved by the invention]

As described above, the conventional tape loading mechanism is configured, and the tape pull-out member is pressed and fixed by the spring at the second position, but at the first position, the positioning accuracy of the tape pull-out member is the driving force transmission. Due to the dimensional error of the intervening parts and the cumulative amount of clearance between the parts, it becomes extremely unstable and may be displaced due to external vibration or shock. Due to instability of the positioning of the tape pull-out member, the magnetic tape is damaged by the post on the tape pull-out member every time the tape cassette is loaded.

The present invention has been made to solve the above problems, and has a simple mechanism in which the tape pull-out member is not only at the second position when loading is completed but also when the unloading is completed. Even in the position, it is accurately positioned and fixed, and when loading the tape cassette,
An object of the present invention is to provide a tape loading mechanism of a magnetic recording / reproducing apparatus which does not damage the magnetic tape.

[Means for solving problems]

A tape loading mechanism of a magnetic recording / reproducing apparatus according to the present invention has a transmission member slidably supported on the drive member in the same direction as the operation direction of the drive member and a predetermined interval in the operation direction of the transmission member. And a third spring formed on the drive member so as to overlap the first and second spring hooks formed on the transmission member and the first and second spring hooks when the transmission member is in the neutral position of sliding. When the transmission member and the transmission member are in the neutral position, one end is engaged with the overlapping first and third spring engaging parts, and the other end is engaged with the overlapping second and fourth spring engaging parts. When the transmission member slides relative to the drive member from the neutral position to one side, the spring has one end only for the first spring hook portion and the other end only for the fourth spring hook portion. And the transmission member When the spring is biased toward the position and the transmission member slides to the other, one end of the spring is engaged only with the second spring hook portion, and the other end is engaged with only the third spring hook portion. The transmission member is biased toward the neutral position.

[Action]

The tape loading mechanism according to the present invention uses a spring stretched between a drive member and a transmission member to press and fix the tape pull-out member at the completion of loading and to accurately fix the tape pull-out member at the completion of unloading. Proper positioning and fixing are performed.

〔Example〕

The present invention will be described below with reference to the drawings showing an embodiment thereof.

In this embodiment, this invention is based on the DAT (Digital Audio
This is an example implemented in the loading mechanism of a tape recorder.

In FIGS. 1 to 3, reference numeral (31) is a chassis, (3
2) (33) is a guide groove formed in the chassis (31), (34) (35) is a tape pull-out member, and the guide groove (3
2) It is slidably supported along (33). Reference numerals (36) and (37) denote tape pull-out arms, one end of which is engaged with the tape pull-out members (34) and (35) via links (38) and (39) which are rotatably supported. Gears (40) (41) are fixed to the other end, and are pivotally supported by shafts (42) (43) standing on the chassis (31).

(44) and (45) are stoppers at the second position of the tape pull-out members (34) and (35), and (46) is a drive member, and guide grooves (46a) (46b) provided on the drive member (46). ) (46
c) guides and slides on the shaft (47) and the shafts (42) and (43) which are erected on the chassis (31).

Reference numeral (48) is a rack which is a transmission member, and is engaged with the gear (40) and is supported on the drive member (46) in the sliding direction in the same direction as the reciprocating motion of the drive member (46). Also (49)
Is a rack which is the other transmission member, and is engaged with the gear (41). Like the rack (48), it is a drive member (4).
6) Slidably supported on.

(48a) is a first spring hook formed on one side of the rack (48), (48b) is a second spring hook formed on the other side of the rack (48), (46b) (46e) ) Is the drive member (4
The third and fourth spring hook portions formed in 6) are arranged at positions corresponding to the first and second spring hook portions (48a) (48b) of the rack (48), respectively. . Further, (49a) is a first spring hook portion formed on one side of the rack (49), (49b) is a second spring hook portion formed on the other side of the rack (49), and (46f) ( 46g) is a drive member (4
The third and fourth spring hook portions formed in 6) are arranged at positions corresponding to the first and second spring hook portions (49a) (49b) of the rack (49), respectively. . In the following description, each is simply referred to as a spring hook,
Distinguish only by the sign.

Next, (50) and (51) are springs, and the spring (50) engages the hook portion at one end thereof with the spring hooking portions (46b) and (48a) as shown in FIG. The hook portion at the other end is engaged with the spring hook portions (46e) and (48b) together, and the spring hook portions (46d) and (48a) and the spring hook portions (46e) and (48b) are always engaged. ) The biasing force is working so that Similarly, the spring (51) engages the hook portion at one end thereof with the spring hook portion (46f) (49a), and further, the hook portion at the other end of the spring hook (46g) (49b). Are engaged with each other, and the biasing force acts so that the spring hooking portions (46f) and (49a) and the spring hooking portions (46g) and (49b) overlap each other. A cam (52) is driven by a motor (not shown), and is pivotally supported by a shaft (53) erected on the chassis (31). Reference numeral (54) is a cam groove formed in the cam (52), and both end portions (54a) (54b) of the cam groove (54) are formed concentrically with the shaft (53). (55) is an arm, one end of which is a shaft (56) erected on the chassis (31).
The engaging groove (5) formed in the drive member (46) and the pin (57) which is pivotally supported by the cam groove (54) at the other end.
It has a pin (59) that engages with 8).

Next, the operation of the above embodiment will be described.

FIG. 1 is a plan view showing a state where the tape pull-out members (34) (35) are in the first position in the cassette, that is, a state before loading, and when the loading operation is started,
The cam (52) rotates clockwise, following the change from the outer circumference to the inner circumference of the cam groove (54), and the arm (55) moves toward the shaft (5
Rotate in the direction of arrow c with 6) as the fulcrum. This arm (5
By the rotation of (5), the driving member (46) is guided in the direction of arrow D by the pin (59) and the engaging groove (58).
6b) (46c) moves while being guided by the shafts (47) (42) (43).

In the state shown in FIG. 1, since the drive member (46) and the rack (48) of the spring (50) are relatively displaced from each other, the spring hooking portion (46d) of the drive member (46) and the rack (48) are separated from each other. ), And the rack (48) is biased to the left in the figure, and accordingly, the gear (40), the tape pull-out arm (36) and The tape pull-out member (34) is pressed and positioned to the lower end of the guide groove (32) via the link (38).

Similarly for the spring (51), the spring hooking portion (46) of the drive member (46).
It is stretched between f) and the spring hooking part (49b) of the rack (49), and the tape pull-out member (35) is pressed and positioned to the lower end of the guide groove (33) in the same manner as above. .

Here, as the drive member (46) moves in the direction of the arrow D as described above, each spring of the drive member (46) and the rack (48) and between the drive member (46) and the rack (49) is spring-loaded. The flexure of the springs (50) (51) will be restored at the time when the tapes have moved by the deviation of the parts, and the tape pull-out members (34) (35) will be moved from the first position along the guide grooves (32) (33) for the first time. The movement starts in the second position direction.

FIG. 2 shows a state in which the tape pull-out members (34) (35) that have started moving in this way are moving, in which the racks (48) (49) are neutral with respect to the drive member (46). In position.

Tape drawer members (34) (35) are stoppers (44) (45)
The tape pull-out members (34) (35), the tape pull-out arms (36) (37), the gears (40) (41), and the rack (4).
8) Even after (49) has stopped, the cam (52) continues to rotate,
The drive member (46) is provided with movement through the arm (55), so that the drive member (46) is stopped by the rack (48) (4).
9) Moves to the right in the figure, causing a gap between each other. The spring (50) is placed between the spring hooking portion (48a) of the rack (48) and the spring hooking portion (46e) of the driving member (46), whereby the rack (48) is In the figure, an urging force is generated in the right direction, and the gear (4
0), the tape pull-out member (34) is pressed and fixed to the stopper (44) via the tape pull-out arm (36) and the link (38).

Similarly, the spring (51) has a spring hooking portion (49a) and (4).
6g) and the tape pull-out member (35) is pressed and fixed to the stopper (45).

FIG. 3 shows the time when the loading is completed, that is, the state where the tape pull-out members (34) (35) are in the second position.

Next, the unloading operation will be described.

The cam (52) rotates counterclockwise from the state where the tape pull-out members (34) (35) in FIG. 2 are in the second position, and follows the change from the inner circumference to the outer circumference of the cam groove (54). Then, the arm (55) rotates in the arrow E direction with the shaft (56) as a fulcrum.

By this rotation, the guide groove (46a) (46b) (46c) of the drive member (46) moves in the direction of arrow F in the drawing so that the shaft (47) (42).
The springs (50) (51) move back while being guided by (43), and then the racks (48) (49) move together with the drive member (46) to move the gears (40) (41), Tape pull-out member (34) via the tape pull-out arm (36) (37)
(35) is moved from the second position to the first position.

In this way, the tape pull-out members (34) (35) reach the lower ends of the guide grooves (32) (33), and the tape pull-out members (34) (35), tape pull-out arms (36) (37), Even after the gears (40) (41) and the racks (48) (49) have stopped,
The cam (52) continues to rotate, the drive member (46) continues to move via the arm (55), and the drive member (46) moves rightward with respect to the stopped racks (48) (49). The springs (50) (51) are displaced and deflected, whereby the tape pull-out members (34) (35) are pressed against the lower ends of the guide grooves (32) (33) to be positioned. In this state, the pin (57) of the arm (55) reaches the end (54b) which is a concentric circle of the cam groove (54), completes the unloading operation, and returns to the state shown in FIG. .

In the above embodiment, the transmission from the motor to the drive member (46) is performed by the cam (52) and the arm (55) swinging by the cam groove (54), but the invention is not limited to this. However, the transmission may be continuous transmission by a gear or the like, or intermittent transmission such as a notched gear mechanism or the like.

In addition, the reciprocating motion of the drive member (46) is changed by the rack (48) (4
9) and the gears (40) (41) convert the rotational movement of the tape pull-out arm, but it may be achieved by means of, for example, a cam or engagement between a pin and a groove.

Further, in the above embodiment, DAT (digital audio
Although the tape recorder) has been described, it goes without saying that it can also be used for a tape loading mechanism in a magnetic recording / reproducing apparatus such as a VTR.

[Effect of device]

As described above, according to the present invention, the transmission member slidably supported on the drive member in the same direction as the operation direction of the drive member and the transmission member at a predetermined interval in the operation direction of the transmission member. The formed first and second spring hooks and the third and fourth formed on the drive member so as to overlap the first and second spring hooks when the transmission member is in the sliding neutral position.
And the transmitting member is in the neutral position, one end is engaged with the overlapping first and third spring engaging parts and the other end is engaged with the overlapping second and fourth spring engaging parts. When the transmission member slides from the neutral position to one side with respect to the drive member, the spring engages only one end with the first spring hook portion and the other end only with the fourth spring hook portion. When combined, the transmission member is biased toward the neutral position and the transmission member slides to the other, the spring has one end only for the second spring hook portion and the other end for the third spring hook portion. Since the transmission member is configured to be biased toward the neutral position by being respectively engaged with each other, the tape pull-out member has a simple structure not only when the loading is completed but also when the unloading is completed. Position by pressing to the correct position Tape loading mechanism of a magnetic recording and reproducing apparatus capable of has the effect of can be obtained.

[Brief description of drawings]

1 is a plan view of a tape loading mechanism in an unloading state according to an embodiment of the present invention, FIG. 2 is a plan view showing a state in the middle of the loading process of FIG. 1, and FIG. 3 is a loading state of FIG. Plan view of No. 4,
FIG. 5 is a detailed exploded view of essential parts of FIG. 1, and FIG. 5 is a plan view showing an unloading state of a conventional tape loading mechanism,
FIG. 6 is a plan view showing the loading state of FIG. (32) (33) …… Guide groove, (34) (35) …… Tape pull-out member, (36) (37) …… Tape pull-out arm, (4
0) (41) …… Gear, (46) …… Drive member, (46d) (46
e) (46f) (46g) (48a) (48b) (49a) (49b) ……
Spring hooking part, (48) (49) …… Transmission member (track),
(50) (51): Elastic member (spring). In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A predetermined path between a first position where a magnetic tape in a cassette can be pulled out from the cassette and a second position where the magnetic tape can be attached to a rotating drum at a predetermined angle. In a tape loading mechanism of a magnetic recording / reproducing apparatus, which comprises a reciprocating tape drawing member, a driving member reciprocating by a driving device, and a transmission means for converting the reciprocating motion of the driving member into the movement of the tape drawing member. A transmission member slidably supported on the drive member in the same direction as the movement direction of the drive member, and first and first transmission members formed on the transmission member at a predetermined interval in the movement direction of the transmission member. The third spring and the fourth spring formed on the driving member so as to overlap the first spring and the second spring when the transmission member is in the neutral position of sliding. When the spring hook portion and the transmission member are in the neutral position, one end is engaged with the overlapping first and third spring hook portions and the other end is engaged with the overlapping second and fourth spring hook portions, respectively. When the transmission member slides from the neutral position to the one side with respect to the drive member, one end of the spring is only the first spring hook portion and the other end is the fourth spring. When the transmission members are respectively engaged with only the hook portions to urge the transmission member toward the neutral position and the transmission members slide to the other, the spring has one end only in the second spring hook portion. , And the other end is engaged with only the third spring hooking portion to bias the transmission member toward the neutral position. mechanism.