JPH0773555A - Loading post press-fixing mechanism - Google Patents

Abstract

PURPOSE:To perform the press-fixings of two loading posts with one energizing means and to realize reducing the size and thickness of a mechanism by eliminating the use of a double gear-with spring in a loading post press-fixing mechanism used in a magnetic recording and reproducing device. CONSTITUTION:First and second shafts 5, 6 are energized simultaneously respectively to directions in which feeding side and take-up side loading posts 1, 2 are locked with feeding side and take-up side stoppers 24, 25 being an locking means respectively by regulating a charging arm 13 being the energizing means at a position where the arm 13 can energize first and second shafts 5, 6 on feeding side and take-up side ring gears 3, 4. Thus, feeding side and take-up side loading posts 1, 2 are press-fixed and positioned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading post crimping mechanism in a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art In a conventional magnetic recording / reproducing apparatus, a gear for driving a loading gear is composed of a double gear, and a coil spring or the like is arranged around a center between two gears forming the double gear. It is configured such that one gear drives the double gear and the other gear transmits the driving force to the loading gear, and when the loading post driven by the loading gear is stopped by the stopper, The gear is rotated excessively against the other gear against the coil spring to obtain a pressing force for the stopper of the loading post.

For example, in Japanese Patent Laid-Open No. 3-127373, the rotational force of the cam gear 91 is the gear 9 as shown in FIG.
2 and the gear 93 to be transmitted to the loading main gear 94, and the rotational force thereof is further transmitted to the first loading gear 96 via the gear 95 coaxially connected to the loading main gear 94 and to the gear 97. It is transmitted to the second loading gear 99 via a gear 98 coaxially connected to this gear 97, and these gear 96 and gear 99 drive ring gears 100 and 101 provided with loading posts (not shown), respectively. . At this time, gears 94 and 95
The gears 97 and 98 are each formed of a double gear, and the gears 94 and 95 and the gears 97 and 98 are connected to each other via coil springs 102 and 103 disposed around the center, respectively, and Although the driving of the loading gear 96 and the second loading gear 99 is not hindered, the gears 94 and 97 are not locked when the loading posts interlocking with the ring gears 100 and 101 are stopped by the stopper (not shown) at the loading position. Rotate a little further and gears 94 and 9
5, the coil spring 102 between 5 and the coil spring 103 between the gears 97 and 98 are extended, and the spring force of each elastically presses the loading post to the stopper to ensure the holding of the loading post. There is.

[0004]

However, in the conventional magnetic recording / reproducing apparatus as described above, in order to elastically press the loading posts, the loading posts on the supply side and the loading posts on the winding side are attached respectively. Bias means are needed, many gears are required, and
The thickness and the occupied area increase. Especially when using two double gears with springs, the problem is large,
It was extremely disadvantageous in making it smaller, lighter, and thinner.

The present invention solves the above-mentioned problems of the prior art by eliminating the use of a double gear with a spring and allowing one biasing means to crimp two loading posts.
It is an object of the present invention to provide a loading post crimping mechanism that can be made compact and thin.

[0006]

In order to achieve this object, a loading post crimping mechanism of the present invention comprises a first shaft erected on a supply side ring gear for driving a supply side loading post, and a winding shaft. A second shaft erected on the take-up ring gear for driving the take-up loading post;
Locking means for locking the supply side and take-up side loading posts at the loading position and slidable arrangement with respect to the chassis, and the supply side and take-up side loading posts at the loading position. Urging means for urging the first and second shafts simultaneously in the direction of being locked by the urging means, and a position where the urging means can urge the first and second shafts and a position where they are not urged. And a position restricting means for restricting the position of the biasing means.

[0007]

With the above construction, the urging means is restricted to the position allowing the urging means to urge the first and second shafts at the loading position,
The first and second shafts are simultaneously urged in the directions in which the supply side and winding side loading posts are locked by the locking means. Therefore, the loading posts on the supply side and the winding side are crimped and positioned.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a loading post crimping mechanism at a loading position according to the first embodiment of the present invention. FIG. 2 is a plan view of the loading post crimping mechanism in the middle of loading according to the present invention. FIG. 3 is a plan view of the loading post crimping mechanism at the unloading position according to the present invention. 4 and 5 are side views of the loading post crimping mechanism according to the present invention.

In FIG. 1, on the supply side boat 20,
Supply side loading post 1 and supply side inclined post 21
And is locked to the supply side ring gear 3. A winding-side loading post 2 and a winding-side inclined post 23 are formed on the winding-side boat 22 and are locked to the winding-side ring gear 4. The supply side ring gear 3 has a tooth portion 3a formed in a predetermined range on the inner circumference thereof, and has a first shaft 5 and a third shaft 3a.
The axis 7 of is set up. On the winding side ring gear 4,
A tooth portion 4a is formed in a predetermined range on the outer circumference, and a second shaft 6 and a fourth shaft 8 are planted and arranged substantially coaxially with the supply side ring gear 3. On the upper surface of the cam gear 9, a cam portion 9a for restricting the position of a charge arm 13 which will be described later and a toothless portion 9b are provided in a predetermined range on the outer circumference so as to mesh with the winding side ring drive gear 11. Is configured. The winding-side ring drive gear 11 is the winding-side ring gear 4
It is configured so as to mesh with the tooth portion 4a of the above and also mesh with the intermediate gear 12. The supply side ring drive gear 10 meshes with the tooth portion 3 a of the supply side ring gear 3 and also has an intermediate gear 12
Is configured to mesh with. A torsion coil spring 14 is provided on the charge arm 13 as an urging means. One end of the charge arm 13 is always urged in the A direction and the other end is urged in the B direction, and the charge arm 13 is erected on the sliding plate 16. Shaft 17
Supported by. Further, both ends of the charge arm 13 have a first shaft 5, a second shaft 6, a third shaft 7, and a fourth shaft 8.
Is configured to be engageable with (see FIGS. 4 and 5). A regulation shaft 18 for regulating the turning angle of both ends of the charge arm 13 is erected on the sliding plate 16, and the charge arm 13 is provided with the first shaft 5, the second shaft 6, and the third shaft 6. In the course of the loading operation in which the shaft 7 and the fourth shaft 8 are not engaged, both ends of the charge arm 13 are always locked by the restriction shaft 18, whereby the rotation angle is restricted. The sliding plate 16 is disposed on the chassis 15 so as to be slidable in one direction by a predetermined amount. The lever 19 is rotatably arranged on the chassis 15, one end of which is engaged with the sliding plate 16 and the other end of which is engaged with the cam portion 9 a of the cam gear 9.

The operation of the loading post crimping mechanism of the present embodiment constructed as above will be described below. FIG. 3 shows the state of the unloading position before the start of the loading operation. In the unloading position, both ends of the charge arm 13 are placed at positions (see FIG. 4) in which the cam shaft 9 can be engaged with the third shaft 7 and the fourth shaft 8 via the levers 19.
The third shaft 7 is urged in the A direction and the fourth shaft 8 is urged in the B direction because the position is regulated by the supply boat 20.
The take-up boat 22 is positioned.

Next, when the loading operation is started,
The driving force from the loading motor (not shown) is transmitted to the cam gear 9, and the cam gear 9 rotates counterclockwise.
Further, the sliding plate 16 is driven in the C direction in association with the rotation of the cam gear 9, and the charge arm 13 is moved to the first shaft 5, the second shaft 6, the third shaft 7, and the fourth shaft 8. The third shaft 7 and the fourth shaft 8 pass without interfering with the charge arm 13 because they are restricted to the position where they are not biased (see FIG. 5). In this state, the supply side ring gear 3 and the winding side ring gear 4 can be driven without interfering with the charge arm 13. At the same time, the winding-side ring gear 4 rotates counterclockwise via the winding-side ring drive gear 11, and the winding-side boat 22 is driven. Similarly, the supply-side ring gear 3 rotates clockwise through the winding-side ring drive gear 11, the intermediate gear 12, and the supply-side ring drive gear 10 to drive the supply-side boat 20 (see FIG. 2).

When the loading operation further progresses and the first shaft 5 and the second shaft 6 pass the charge arm 13, the sliding plate 16 is driven in the D direction, and the charge arm 13 is moved to the first shaft 5. Since the second shaft 6, the third shaft 7, and the fourth shaft 8 are restricted to positions that can be engaged (see FIG. 4),
The first shaft 5 and the second shaft 6 are biased to both ends of the charge arm 13. At the same time, the toothless portion 9 provided on the cam gear 9
The drive of the supply side and take-up side ring gears 3 and 4 is stopped by b. Accordingly, the loading operation is completed by bringing the supply boat 20 into contact with the supply stopper 24 serving as the locking means and the winding boat 22 in contact with the winding stopper 25 serving as the locking means. The winding-side boat 22 is crimped and positioned at the loading position (see FIG. 1). The unloading operation is achieved by rotating the cam gear 9 in the clockwise direction. However, the operation is the reverse of the above-described loading operation, and a description thereof will be omitted.

As described above, according to the present embodiment, the pressure of the two loading posts can be achieved by one urging means, and at the same time, the tip of the charge arm has the shape shown in FIGS. 4 and 5. The moving distance for restricting the position of the biasing means can be shortened, and the loading post crimping mechanism excellent in downsizing and thinning of the mechanism can be realized.

In this embodiment, the charge arm urges the third and fourth shafts at the unloading position. However, it is not necessary to urge the charging arm as long as the positions of the supply boat and the winding boat can be maintained. .

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a plan view of a loading post crimping mechanism at the loading position according to the second embodiment of the present invention. FIG. 7 is an operation explanatory view showing a state in which the first and second shafts engage with the first and second pressing plates at the loading intermediate position of the loading post crimping mechanism according to the present invention. FIG. 8 is an operation explanatory diagram showing a state of the first and second pressing plates of the loading post crimping mechanism according to the present invention, which are maintained in the posture at the loading intermediate position.
FIG. 9 is an operation explanatory view showing a state in which the third and fourth shafts engage with the first and second pressing plates at the loading intermediate position of the loading post crimping mechanism in the present invention. Figure 10
FIG. 4 is a plan view of the loading post crimping mechanism at the unloading position in the present invention. FIG. 11 is a side view of the loading post crimping mechanism according to the present invention. Figure 1
2 is a plan view of the first and second pressing plates of the loading post crimping mechanism according to the present invention. FIG.

In FIG. 6, the feeding side loading post 1, the winding side loading post 2, the feeding side ring gear 3, the winding side ring gear 4, the feeding side ring drive gear 10,
The winding side ring drive gear 11, the intermediate gear 12, the supply side boat 20, the winding side boat 22, the supply side inclined post 21, the winding side inclined post 23, the supply side stopper 24, and the winding side stopper 25 are shown in FIG. The configuration is the same as that of. Figure 1
The configuration is different from that of No. 1 in that the position regulating means for regulating the position of the biasing means is not provided. Further, the first, third, and second, fourth shafts are formed on the surfaces of the supply-side ring gear 3 and the winding-side ring gear 4 that are substantially coaxial with each other and do not face each other. Is. Furthermore, the structure of the biasing means is that the first, second, third and fourth shafts are biased via the pressing plate.

The structure of the biasing means will be described below.
In FIG. 6, the sliding plate 16 on which the support shaft 17 is erected is slidable by a predetermined amount in the directions (E and F directions) toward and away from the supply side and take-up side ring gears 3, 4. It is located above. Since both ends of the torsion coil spring 14 whose center of rotation is supported by the support shaft 17 are locked by the locking shafts 29 set up in the chassis 15, the sliding plate 16 is provided.
Are always biased in the E direction. The first pressing plate 27 and the second pressing plate 28 are rotatable by a predetermined amount on a rotation shaft and are supported by the support shaft 17. Further, the first pressing plate 27 and the second pressing plate 28 are respectively provided with the first shaft 5,
It is configured to be engageable with the third shaft 7, the second shaft 6, and the fourth shaft 8 (see FIG. 11). Further, as shown in FIG. 12, the first and second pressing plates 27 and 28 are respectively
Notches 27a, 28a, second notches 27
b, 28b and third cutout portions 27c, 28c. In addition, the first pressing plate 27 and the second pressing plate 28
Are the first axis 5, the third axis 7, and the second axis 6, respectively.
A posture holding shaft 30 is provided on the chassis 15 for holding the postures of the first and second pressing plates 27 and 28 at positions in the middle of the loading operation that are not engaged with the fourth shaft 8.

The operation of the loading post crimping mechanism of the present embodiment constructed as described above will be described below. FIG. 10 shows the state of the unloading position before the start of the loading operation. At the unloading position, the first notch portion 27a of the first pressing plate 27 is attached to the third shaft 7 and the second notch portion 27a
The second cutout portion 28b of the pressing plate 28 is engaged with the fourth shaft 8 and the sliding plate 16 is biased in the E direction. It is positioned at the unloading position.

When the loading operation is started, the driving force from the loading motor (not shown) is applied to the main gear 2.
6, and the main gear 26 rotates counterclockwise. At the same time, the winding-side ring gear 4 rotates counterclockwise via the winding-side ring drive gear 11, and the winding-side boat 22
Is driven. Similarly, the supply-side ring gear 3 rotates clockwise through the winding-side ring drive gear 11, the intermediate gear 12, and the supply-side ring drive gear 10, and the supply-side boat 20
Is driven. Further, the first pressing plate 27 engaged with the third shaft 7 as the supply ring gear 3 rotates causes the third pressing shaft 27 to rotate.
The torsion coil spring 14 while maintaining the state of being engaged with the
It rotates counterclockwise against the urging force of. Similarly, with the rotation of the winding side ring gear 4, the second gear engaged with the fourth shaft 8
The pressing plate 28 rotates in the clockwise direction against the biasing force of the torsion coil spring 14 while maintaining the engagement with the fourth shaft 8. Therefore, the first and second pressing plates 27, 2
8, the sliding plate 16 moves in the F direction (see FIG. 9).
reference).

When the loading operation further proceeds,
The third and fourth shafts 7 and 8 engaged with the second pressing plates 27 and 28 are separated (see FIG. 8). Third and fourth shafts 7, 8
Is completely separated from the first and second pressing plates 27 and 28, the sliding plate E is moved by the urging force of the torsion coil spring 14.
Moving in the direction, the third notches 27c, 28c of the first and second pressing plates 27, 28 are locked to the posture holding shaft 30,
The postures of the first and second pressing plates 27 and 28 are maintained (see FIG. 8).

When the loading operation further proceeds, the first shaft 5 engages with the second notch portion 27b of the first pressing plate 27 and counteracts the first pressing plate 27 counterclockwise against the biasing force. And the sliding plate 16 moves in the F direction. Similarly,
The second shaft 6 is the first cutout portion 28a of the second pressing plate 28.
The second pressing plate 28 is rotated in the clockwise direction while resisting the urging force while being engaged with, and the sliding plate 16 moves in the F direction. At the same time, the third notch 27 of the first and second pressing plates 27, 28 is formed.
The locked state between the c and 28c and the posture holding shaft 30 is released (see FIG. 7).

When the loading operation further proceeds, the first shaft 5 rotates the first pressing plate 27 counterclockwise and the second shaft 6 rotates the second pressing plate 28 clockwise. At the same time, the sliding plate 16 moves in the F direction.

When the loading operation further proceeds, the supply boat 20 is placed on the supply stopper 24 and the winding boat 2
2 is locked by the take-up side stopper 25, and at the same time, the drive of the supply side and take-up side ring gears 3 and 4 is stopped by the toothless portion 26a provided in the main gear 26. Also, the first and second
The pressing plates 27 and 28 are urged in the E direction while maintaining the engaged state with the first and second shafts 5 and 6. Therefore,
After the loading operation is completed, the supply boat 20 and the winding boat 22 are crimped and positioned in the direction in which they are locked by the supply stopper 24 and the winding stopper 25 (see FIG. 6). The unloading operation is achieved by rotating the main gear 26 in the clockwise direction. However, the operation is the reverse of the above-described loading operation, and a description thereof will be omitted.

As described above, according to this embodiment, since two loading posts can be crimped by one urging means, a double gear with a spring is not required, which is extremely useful for thinning the mechanism. Is effective for. In addition, it is not necessary to use a Geneva gear for the intermittent drive mechanism of the loading ring, and it is possible to simplify not only the thickness but also the drive mechanism.
Further, a loading post crimping mechanism that is excellent in reducing the size and thickness of the mechanism and reducing the number of mechanical parts, such as a drive mechanism for driving the crimping mechanism, is realized.

In this embodiment, the first pressing plate urges the third shaft and the second pressing plate urges the fourth shaft in the unloading position. There is no need to energize as long as you can hold the position of the boat. Further, in the present embodiment, the first and second pressing plates press and bias the first, second, third and fourth shafts by the biasing force of the torsion coil spring, but the cam via the lever is used. It may be biased by a gear (not shown).

[0027]

As described above, the first embodiment of the present invention is
A first shaft set up on a supply side ring gear for driving the supply side loading post, and a second shaft set up on a winding side ring gear for driving the winding side loading post; Locking means for locking the supply side and take-up side loading posts at the loading position and slidable arrangement with respect to the chassis, and lock means for the supply side and take-up side loading posts at the loading position. Urging means for urging the first and second shafts simultaneously in the direction in which the first and second shafts are locked, and a position where the urging means is capable of urging the first and second shafts, respectively. By providing the position and position regulating means for regulating the position of the urging means, it is possible to achieve crimping of the two loading posts with one urging means, and at the same time, the tip shape of the charge arm is shown in FIG. Shown in 5 Movement distance for the position regulating of the urging means to you are Jo can take short, compact, the loading post crimping mechanism with excellent thin can be realized.

In the second embodiment of the present invention, the first shaft erected on the supply side ring gear for driving the supply side loading post and the winding shaft for driving the winding side loading post. A second shaft erected on the take-up ring gear, locking means for locking the supply-side and take-up-side loading posts at the loading position, and a first pressing plate engageable with the first shaft. And a second pressing plate engageable with the second shaft are rotatably arranged on the rotary shaft by a predetermined amount, and are slidable with respect to the chassis by a predetermined amount, and the rotary shaft core is always provided. In the direction close to the supply side and take-up side ring gears.
By providing a biasing means for biasing the pressing plate of
Since two loading posts can be crimped by one biasing means, a double gear with a spring is not required, which is very effective for thinning the mechanism. In addition, it is not necessary to use a Geneva gear for the intermittent drive mechanism of the loading ring, and it is possible to simplify not only the thickness but also the drive mechanism. Further, it is possible to realize a loading post crimping mechanism which is excellent in reducing the size and thickness of the mechanism and reducing the number of mechanical parts, such as a drive mechanism for driving the crimping mechanism is unnecessary.

[Brief description of drawings]

FIG. 1 is a plan view of a loading post crimping mechanism at a loading position according to a first embodiment of the present invention.

FIG. 2 is a plan view of a loading post crimping mechanism at a loading intermediate position in the first embodiment.

FIG. 3 is a plan view of a loading post crimping mechanism at an unloading position in the first embodiment.

FIG. 4 is a side view of the loading post crimping mechanism according to the first embodiment.

FIG. 5 is a side view of the loading post crimping mechanism according to the first embodiment.

FIG. 6 is a plan view of a loading post crimping mechanism at a loading position according to a second embodiment of the present invention.

FIG. 7 is an operation explanatory view showing a state in which the first and second shafts engage with the first and second pressing plates at the loading intermediate position of the loading post crimping mechanism in the second embodiment.

FIG. 8 is an operation explanatory view showing a state of the first and second pressing plates in which the posture of the loading post crimping mechanism in the second embodiment is maintained at the loading intermediate position.

FIG. 9 is an operation explanatory view showing a state in which the third and fourth shafts engage with the first and second pressing plates at the loading intermediate position of the loading post crimping mechanism in the second embodiment.

FIG. 10 is a plan view of a loading post crimping mechanism at an unloading position in the second embodiment.

FIG. 11 is a side view of the loading post crimping mechanism according to the second embodiment.

FIG. 12 is a plan view of first and second pressing plates according to the second embodiment.

FIG. 13 is a plan view of a loading post crimping mechanism in a conventional example.

[Explanation of symbols]

 1 Supply Side Loading Post 2 Winding Side Loading Post 3 Supply Side Ring Gear 4 Winding Side Ring Gear 5 First Shaft 6 Second Shaft 7 Third Shaft 8 Fourth Shaft 9 Cam Gear 13 Charge Arm 14 Torsion Coil spring 15 Chassis 19 Lever 24 Supply side stopper 25 Winding side stopper 27 First pressing plate 28 Second pressing plate 30 Posture holding shaft

Claims (5)

[Claims] 1. A loading position at which a magnetic tape in a tape cassette is pulled out and wound around a rotary head device at a predetermined angle to complete the pulling-out operation of the magnetic tape,
A loading post crimping mechanism of a magnetic recording / reproducing apparatus that performs a loading operation between unloading positions where the magnetic tape is housed in the tape cassette, and is mounted on a supply side ring gear for driving a supply side loading post. An upright first shaft, a second shaft erected on a take-up ring gear for driving the take-up side loading post, and an engagement between the supply side and take-up side loading post at the loading position. Locking means for stopping and a slidable arrangement with respect to the chassis, and at the loading position, the supply side and take-up side loading posts are arranged in the first and second directions in a direction to be locked by the locking means. And a biasing means for simultaneously biasing the second shaft, and a position at which the biasing means is capable of biasing each of the first and second shafts and does not bias the biasing means. Loading post crimping mechanism; and a position regulating means for regulating the position of said biasing means and location. 2. A third shaft set up on a supply side ring gear for driving the supply side loading post, and a third shaft set up on a winding side ring gear for driving the winding side loading post. No. 4, an urging means for simultaneously urging the third and fourth shafts in the unloading position in the direction in which the supply-side and take-up-side loading posts move from the loading position to the unloading position. 2. The position regulating means for regulating the position of the biasing means at a position where the biasing means can bias each of the third and fourth shafts and a position where the biasing means does not bias the biasing means. Loading post crimping mechanism. 3. A loading position for pulling out the magnetic tape in the tape cassette and winding the magnetic tape around the rotary head device at a predetermined angle to complete the pulling-out operation of the magnetic tape,
A loading post crimping mechanism of a magnetic recording / reproducing apparatus that performs a loading operation between unloading positions where the magnetic tape is housed in the tape cassette, and is mounted on a supply side ring gear for driving a supply side loading post. An upright first shaft, a second shaft erected on a take-up ring gear for driving the take-up side loading post, and an engagement between the supply side and take-up side loading post at the loading position. A locking means for stopping, a first pressing plate engageable with the first shaft, and a second pressing plate engageable with the second shaft are rotated by a predetermined amount on a rotation shaft. It is freely arranged and slidable with respect to the chassis by a predetermined amount, and always biases the first and second pressing plates in the direction in which the rotating shaft core is close to the supply side and winding side ring gears. And a biasing means for At the loading position, the first and second pressing plates press and bias the first and second shafts in a direction in which the supply side and take-up side loading posts are locked to the locking means. Characteristic loading post crimping mechanism. 4. A third shaft set up on a supply side ring gear for driving the supply side loading post, and a third shaft set up on a winding side ring gear for driving the winding side loading post. No. 4, the first pressing plate is engageable with the third shaft, and the second pressing plate is engageable with the fourth shaft, and in the unloading position, the first and second pressing plates are engaged. 4. The plate presses and biases the third and fourth shafts in the direction from the loading position to the unloading position.
The loading post crimping mechanism described. 5. The loading operation midway position in which the first pressing plate does not engage with the first and third shafts and the second pressing plate does not engage with the second and fourth shafts, and the first and second shafts are engaged. 5. The loading post crimping mechanism according to claim 4, further comprising posture holding means for holding the pressing plate of 1. in a specific posture.